egkjktiqj xokfy;j & 474 005 - welcome to rdsordso.indianrailways.gov.in/works/uploads/file/data...

CAMTECH/E/16-17/Databank-OHE/1.0

May, 2016

Hkkjr ljdkj GOVERNMENT OF INDIA

jsy ea=ky; MINISTRY OF RAILWAYS

dsoy dk;Zky;hu mi;ksx gsrq

(For Official Use Only)

egkjktiqj, Xokfy;j & 474 005 Maharajpur, GWALIOR - 474 005

End User :TrD Maintenance Staff

QUALITY POLICY

“To develop safe, modern and cost effective Railway

Technology complying with Statutory and Regulatory

requirements, through excellence in Research, Designs and

Standards and Continual improvements in Quality

Management System to cater to growing demand of

passenger and freight traffic on the railways”.

DATABANK OF

IMPORTANT GUIDELINES, LETTERS, INSTRUCTIONS,

CIRCULARS ETC. FOR OHE

FOREWORD

Electrification of railway tracks plays an important role for reliable and pollution free operation of trains. Various instructions, circulars, letters

etc. are being issued time to time by Board/ RDSO/ Railways to keep Over Head Equipment (OHE) in good condition. During erection of OHE and its

operation and maintenance, various schedule of dimensions (SODs), manuals, reports, letters etc. are required to be referred.

For the convenience of OHE construction/maintenance staff CAMTECH has prepared this "databank on important guidelines, letters,

instructions, circulars etc. for OHE" which provides details and reference at the same place and may be used as and when required.

I am sure this databank will be useful for OHE construction as well as OHE maintenance and operation staff.

CAMTECH, Gwalior A.R.Tupe

Date: 24th May,2016 Executive Director

PREFACE

Over 26 thousands kilometers track has been electrified over Indian Railways and electrification work is in full swing to cater growing

demand of traffic. To maintain such a widespread OHE network, various instructions, circulars, guidelines etc. are issued by Railway Board,

RDSO, Zonal Railways for the reference of Railways.

Participants during various seminars held at Gwalior requested to prepare a data bank for OHE. This "data bank of important guidelines,

letters, instructions, circulars etc. for OHE" prepared by CAMTECH gives the details on various items with their references at a glance in a

tabular format. The databank covers instructions regarding construction, maintenance and operation of Over Head Equipment (OHE) over

Indian Railways. Some items have been added on basis of field experience of field staff. It is expected that this databank will serve as a

"KNOWLEDGE BANK" for field staff maintaining OHE.

It is clarified that this databank does not supersede any existing provisions laid down by Railway Board/RDSO/ Zonal Railways. This

databank is for guidance only and it is not a statutory document.

I am thankful to Zonal Railways and especially to Shri Shiv Ranjan Gupta, SSE/EL of this organization who put all his efforts and

lifelong service experience in making this databank useful. I am also thankful to all field personnel who have helped us in preparing this

databank

Technological up-gradation & learning is a continuous process. Hence feel free to write to us for any addition or modification in this

report. We shall highly appreciate your contribution in this direction.

CAMTECH, Gwalior (Peeyoosh Gupta)

Date: 23rd May, 2016 Director Electrical

e-mail: [email protected]

mailto:[email protected]

CCOONNTTEENNTTSS

SSrr..NNoo.. DDeessccrriippttiioonn PPaaggee NNoo..

Foreword iii Preface iv Contents v Correction Slip viii

11.. FFoouunnddaattiioonn 0011

2. ELECTRICAL CLEARANCES 08

3. CADMIUM COPPER CATENARY WIRE 15

4. HARD DRAWN GROOVED COPPER (HDGC) CONTACT WIRE 17

5. TURN OUT & CROSS OVER 21

6. CURRENT COLLECTION TEST 25

7. BONDING & EARTHING 26

8. AUTO TENSIONING DEVICE (ATD) 31

9. INSULATED CADMIUM COPPER CATENARY 32

10. IMPLANTATION (SETTING DISTANCE) 33

11. TRACK CENTRE 38

12. HEIGHT OF FOB-ROB 40

13. POWER LINE CROSSING 42

14. STAINLESS STEEL WIRE ROPE 51

15. DROPPER AND ENCUMBRANCE 53

16. HEIGHT GAUGE 56

17. OVER DIMENSION CONSIGNMENT (ODC) 57

18. MAXIMUM MOVING DIMENSION (MMD) 59


19. WIND LOAD 62

20. CODAL LIFE (OHE ASSETS) 63

21. TWO TRACK CANTILEVER (TTC) 64

22. THERMO VISION CAMERA 65

23. STAGGER 66

24. SPAN 68

25. TRACK CENTRE 69

26. TOWER WAGON 71

27. OHE & PSI SPARE ITEM 77

28. NEUTRAL SECTION 78

29. OHE IMPEDANCE 81

30. INSULATOR 82

31. TRACK 86

32. TEMPORARY SPEED RESTRICTION 87

33. PORTAL 88

34. TRIMMING /CUTTING OF TREE 90

35. INSPECTION 91

36. WORKING OF LADDER TROLLEY 93

37. CORROSION RESISTANT PAINT SYSTEM FOR OUTDOOR STRUCTURE OF TRACTION DISTRIBUTION 94

38. JOINT PROCEDURE ORDER (S&T, ELECTRICAL). 96

39. OHE RELIABILITY 12 POINTS. 97

40. RETO REFLECTING NUMBER PLATE 99


41. SLEWING OR ALTERATIONS TO TRACK 101

42. SAFETY OF RAILWAY STAFF IN 25 KV AC, 1500 ,DC 102

43. NEW PLAN HEAD TRD 104

44. RUNNING OF TRAINS AT 150 Kmph SPEED 105

45. ISSUE OF COMPETENCY CERTIFICATE TO POINTS MAN 107

46. ANTI THEFT ENERSISATION DURATION 108

47. SAFETY RULES FOR OHE 109

REFERENCE 120

IISSSSUUEE OOFF CCOORRRREECCTTIIOONN SSLLIIPP

The correction slips to be issued in future for this handbook will be numbered as follows:

CAMTECH/ E/2016-17/Databank-OHE/ # XX date---

Where “XX” is the serial number of the concerned correction slip (starting from 01 onwards).

CORRECTION SLIPS ISSUED

Sr. No. Date of issue Page no. and Item no. modified Remarks

CAMTECH/E/16-17/Databank-OHE/1.0 1

Databank of Important Guidelines, Letters, Instructions, Circulars etc. for OHE May, 2016

1. FOUNDATION

Sr. Parameters Details Authority

Observation Action

1. General

i. Measurement Top of Foundation above ground

level

50-100 mm ACTM, Vol-II, Part-II 6.5.9 Appendix

–I (Page-13)

ii. Regulated OHE Length of mast below rail level for

regulated OHE

1850 mm

iii. Unregulated OHE Length of mast below rail level for

unregulated OHE

1750 mm

iv. Measurement Embedment length of mast in

concrete

1350 mm

v. Measurement of

cushion

Concrete cushion below the bottom

of mast

150 mm

vi. Super block Super block may be made of length

and width equal to top of foundation

As per requirement

vii. Slope bank Foundation are constructed on the

slop of bank, no part of it expose.

500 mm from rail level ACTM, Vol-II, Part-II 6.5.8 Appendix

–I (Page-13)

2. Selection of Foundation

i. Side bearing

(Type – B)

300 mm solder width is available on

the bank

Soil bearing capacity

11,000 & 21,000

kgf/m2

ACTM, Vol-II, Part-II 6.5.3 Appendix –

I (Page-13) & RDSO/ Drg. no.

ETI/C/0058

ii. Side bearing

(Type – B)

550 mm solder width is available on

the bank for overlap inter mast and

mast on the inside of curve


11,000 & 21,000

kgf/m2

ACTM, Vol-II, Part-II 6.5.3 Appendix –

I (Page-13) & RDSO/ Drg. no.

ETI/C/0023

2 CAMTECH/E/16-17/Databank-OHE/1.0

May, 2016 Databank of Important Guidelines, Letters, Instructions, Circulars etc. for OHE


Observation Action

iii. Side gravity

(Type – BG)

Adequate solder width is not

available


8,000 & 11,000 kgf/m2

ACTM, Vol-II, Part-II 6.5.5 Appendix –I

(Page-13) & RDSO/ Drg. no. ETI/C/0058

iv. Side gravity

(OHE foundation

drawings for

increase

implantation from

2800 mm to 2900

mm from center

line of nearest

track)

„C‟ dimension as 800 mm

(instead of 600 mm) and

dimension has been shown as

600 mm

As per RDSO Drg. no.

TI/DRG/CIV/FDN/RDSO/

00001/04/0 (sheet-1) has

been modified as Mod –

„B‟

i. RDSO letter No. TI/CiVIL/FDN12

dated 26.03.2012

ii. CEE, CORE‟s letter No.

ELCORE/T/OHE/ALD/FIT/410(Pt.

III) dated 14.02. 2012 & 06.02.2012

iii. RDSO Drg. no.

TI/DRG/CIV/FDN/RDSO/00001/04/ 0

(sheet 1 to 5)

iv. RDSO Drg. no. ETI/OHE/ G/01403 (

sheet 1to 3)

v. Pure gravity

( Type- G)

Soil surrounding the

foundation is loose and cannot

exert passive pressure on the

foundation


5,500, 8,000 & 11,000

kgf/m2



vi. Pure gravity

( Type- P)

Base only take all the bending

moment. Used for portal


8,250 & 11,000 kgf/m2



vii. New pure gravity

(Type- NG)

Foundation should not be

exposed or 300 mm shoulder

width is not available.


5,500, 8,000 & 11,000

kgf/m2

ACTM, Vol-II, Part-II 6.5.2 (1- ii) & 6.5.4

Appendix –I (Page- 11&13) & RDSO/

Drg. no. ETI/C/0058

viii. Pure gravity for

black cotton soil

(Type-WBC)

Foundation are not be used

where swelling / shrinkage is

not expected at the foundation

level


16,500 kgf/m2

ACTM, Vol-II, Part-II 6.5.7.2 Appendix –I

(Page-13) & RDSO/ Drg. no. ETI/ C/0058




Observation Action

ix. New pure gravity

for black cotton

soil (Type- NBC)

Foundation to be used where

swelling/ shrinkage are expected to

occur, depth is 2.5 m


8,000 kgf/m2

ACTM, Vol-II, Part-II 6.5.7.2 Appendix

–I (Page-13) & RDSO/ Drg. no. ETI/ C/

0058

x. Dry black cotton

soil (Type- NBC)

Foundation to be used where

swelling/ shrinkage are expected to

occur, depth is 3.0 m


11,000 & 16,500

kgf/m2

ACTM, Vol-II, Part-II 6.5.2 (1- iii)

Appendix –I (Page-11) & RDSO/ Drg.

no. ETI/C/ 0058

xi. New pure gravity

(Type-NG or SPL)

Different soil and site condition

and foundation are 500 mm

exposed.

- ACTM, Vol-II, Part-II 6.5.2 (1- iv)


no. ETI/C/ 0058

xii.

Soft rock Foundation to be used where soil

are soft rock.


45,000 kgf/m2

ACTM, Vol-II, Part-II 6.5.2 (1-vi)


no. ETI/C/ 0059

xiii. Hard rock Foundation to be used where soil

are hard rock.


90,000 kgf/m2

ACTM, Vol-II, Part-II 6.5.2 (1-vii)


no. ETI/C/ 0060

xiv. For portal Ordinary soil ACTM, Vol-II, Part-II 6.5.2 (2-i)


no. ETI/C/ 005/ 68

Dry back cotton soil ACTM, Vol-II, Part-II 6.5.2 (2-ii)


no. ETI/C/ 0063

xv. Sand core

foundation

The core hole is filled with

perfectly dry sand and well packed

with bitumen sealing at the top.

Top of foundation should always be

kept above ground level.

Foundation is not used

for portals and

location having

bending moment more

than 5000 kg. m

Treatise Volume II Para- 3.5.7 page 119

& RDSO Drg. No. ETI/C/0012/69




Observation Action

3. Special information as discussed during seminar held at CAMTECH on 29.03.2016 is furnished below

i. Type of cement,

Aggregates and

water to be used in

concrete work.

Portal cement conforming to IS: 269 (latest version) or Portland

Pozzolana cement (fly ash based) as per IS: 1489 Pt.I (latest

version) is to be used.

As per IS-269 (latest version) or as

per IS-1489 Pt.I (latest version)

ii. The graded coarse aggregate 40 mm normal size (IS: 383 latest

version) shall be used or foundation. A coarse aggregate for

grouting muffs and embedding shall be of 20 mm graded nominal

size as per IS: 383.

As per IS:383 latest version Group Grade

Designation

Specified Characteristic

Compressive Strength of 150mm

Cube at 28 days in N/mm2

i. Ordinary M 10 10

ii. Concrete M 15 15

iii. M 20 20

4. Minimum cement

content and water

cement ratio

The water cement ratio is an important factor for durability of

concrete. Appropriate values for minimum cement content and the

maximum free water cement ratio are given below in table of IS:

456 or different exposure condition.

As per IS: 456

Exposure Plain Concrete

Min. cement

content Kg/m2

Max. free water

cement ratio

Min. grade of

concrete

i. Mild 220 0.60 --

ii. Moderate 240 0.60 M-15

iii. Severe 250 0.50 M-20

iv. Very Severe 260 0.45 M-20

v. Extreme 280 0.40 M-25




Observation Action

5. Concrete

mixture

proportioning

The mix proportions shall be selected to ensure the work ability of the fresh

concrete and when concrete is hardened, it shall have the required strength,

durability and surface finish.

Concrete for foundations as well as for grouting, muffing embedding of

structures in foundations and for cable trenches at switching stations shall be

obtained by mixing cement, coarse aggregate, fine aggregate and water in

accordance with proportions. The same is reproduced below.

IS: 456 (latest version)

Proportions for nominal mix concrete (Clause 9.3.1)

Grade of

concrete

Total quantity of dry

aggregate by mass per 50

kg. of cement to be taken as

the sum of the individual

masses of the fine and

coarse aggregates, kg, max

Proportion of fine

aggregate of

coarse (by mass)

Quantity of

water per

50kg. of

cement (max

litres)

i. 1 2 3 4

ii. M 5 800 Generally 1:2 but

subject to an

upper limit o

1:1.5 and a lower

limit of 1:2.5

60

iii. M 7.5 625 45

iv. M 10 480 34

v. M 15 330 32

vi. M 20 250 30

Note: The proportions of the fine to coarse aggregates should be adjusted from

upper limit to lower limit progressively as the grading of the fine aggregates

becomes finer and the maximum size of coarse aggregate becomes larger.

Graded coarse aggregate shall be used.




Observation Action

Example:

For average grading of the fine aggregate (that is zone II of IS: 383, 1970 the proportions

shall be 1:1.5 and 1:2 and 1:2.5 for maximum size of aggregate 10 mm, 20 mm and

40mm respectively.

Specification or coarse and fine aggregate from natural sources for concrete (second

revision).

"Volume batching may be allowed only where weigh-batching is not practical and

provided accurate bulk densities of materials to be actually used in concrete have earlier

been established. Allowance for bulking shall be made in accordance with IS: 2386

(Part-3) (latest version). The mass volume relationship should be checked as frequently

as necessary. The frequency for the given job is being determined by Engineer-in-charge

to ensure that the specified grading is maintained."

4. Quality

Assurance

measures

The job of quality control and quality assurance would involve quality audit of both the

inputs as well the outputs. Inputs are in the form of materials for concrete, workmanship

in all stages of batching mixing, transportation, placing, compaction and curing in order

to ensure proper performance, it Is necessary to inspect each step in concreting.

5. Compaction

and curing

Concrete should be thoroughly compacted and fully worked around the reinforcement,

around embedded fixture.

Curing is the process of preventing the loss of moisture from the concrete while

maintaining a satisfactory temperature regime. Exposed surface of concrete shall be kept

continuously wet condition by covering with a layer of sacking and kept continuously

wet for at least 10 days from the date of placing concrete.

6. Supervision Supervision is of extreme importance to check the concrete. Hence constant and strict

supervision of all the items of the construction is necessary during the mixing of the

concrete.




Observation Action

7. Acceptance

criteria

In acceptance criteria, compressive strength of concrete by random sampling procedure

should be included in the contract documents.

Samples from fresh concrete shall be made as per IS: 1199 and cubes shall be made, cured

and tested at 28 days in accordance with IS: 516. The minimum frequency of sampling of

concrete of each grade as mentioned in para-15.2.2 IS:456 (2000) is furnished below:

As per IS:

1199, IS:516

and IS: 456

(2000)

Quantity of concrete in the work,

m3

Number of samples

1 - 5 1

6 - 15 2

16 - 30 3

31 - 50 4

51 and above 4 plus one additional sample for each additional 50m

3

or part thereof.

Note: At least one sample shall be taken from each shift.

8. Test result of

sample

The test results of sample shall be the average of the strength of three specimens. The

individual variation should not be more than +15 percent of the average. If more, the test

results of the sample are invalid.

The compressive strength specified in table shall be the criterion for acceptance or rejection

of the concrete. The same is reproduced below: As per IS:383

latest version Group Grade

Designation

Specified Characteristic Compressive Strength of

150mm Cube at 28 days in N/mm2

i. Ordinary M 10 10

ii. Concrete M 15 15

iii. M 20 20



2. ELECTRICAL CLEARENCES

Sr.

Items Parameter Details Authority

Observation Action

1. Electrical clearance

Vertical and lateral distance between 25 kV live parts and earthed parts of fixed structures or moving loads/rolling stocks shall

be as large as possible. The minimum vertical and lateral electrical clearances to be maintained under worst condition of

temperature, wind etc. between only any live part of the over head equipment or pantograph and parts of any fixed structures

(earthed or otherwise) or moving loads / rolling stocks.

Minimum

electrical

clearance

Long duration

(vertical)

Between live &

earth for 25 kV AC

250 mm i. As per Rly Board‟ Letter No.2011/ CEDO/SD/

IRSOD /Elect/02 dated 14.03.2012.

ii. ACS No.-7 to the Indian Railway SOD (BG) 2004.

chapter V-A Electric Traction ( 25 kV AC Cycles)

iii. Railway Board letter No. 2000/RE/161/ Pt-III

(ACTM) dtd. 24.05.2006

Long duration

(Horizontal)

Between live &

earth for 25 kV AC

250 mm

Short duration

(vertical)

Between live &

earth for 25 kV AC

200 mm

Short duration

(Horizontal)

Between live &

earth for 25 kV AC

200 mm

Note:

a. Long duration means when the conductor is at rest and short duration means when the conductor is not at rest.

b. A minimum vertical distance of 270 mm shall normally be provided between rolling stock and contact wire to allow for a 20

mm temporary raising of the track during maintenance. Wherever the allowance required for track maintenance exceeds 20

mm, the vertical distance between rolling stock and contact wire shall correspondingly be increased.

c. Where adoption of above clearance is either not feasible or involves abnormally high cost, permanent bench mark to be

provided to indicate the level of track to be maintained.



Sr.


Observation Action

2. Minimum height from rail level to the underside of live conductor

i. Minimum height Minimum height

from rail level to

the underside of

live conductor

Under bridges and in

tunnels

4.80 m i. As per Rly Board‟Letter No.2011/

CEDO/SD/ IRSOD /Elect/02 dated

14.03.2012.

ii. ACS No.-7 to the Indian Railway SOD

(BG) 2004. chapter V-A Electric

Traction ( 25 kV AC Cycles)

ii. In the Open 5.50 m

iii. At level crossing 5.50 m

iv. In running and

carriage sheds

5.80 m

Note:

a. In cases where it is proposed to allow only locomotives or stocks not higher than 4.42 m, the minimum height of contact

wire, specified under Item 2(i), may be reduced to 4.69 m.

b. In sections, where the minimum height of contact wire has been kept at 4.54 m as per earlier provisions of IRSOD, 2004,

a board showing the restriction and specifying "locomotives or stocks higher than 4.27 m are not permitted to ply on this

section", should be exhibited at the entrance to the section.

c. For movement of over dimensional consignments, the height specified under Item 2(i) above shall be increased by the

difference between the height of the consignment contemplated and 4.42 m, In case, such on over dimensional

consignment is moved at speed not exceeding 15 kmph and is also specially escorted by authorized Railway staff, the

derived height of contact wire may be reduced by 50 mm.

d. On curves, all vertical distances specified in Item (2) above, shall be measured above the level of the inner rail, increased

by half the super-elevation.

e. Suitable prescribed gradient on the height of contact wire shall be provided for connecting these wires installed at different

heights.



Sr.


Observation Action

3. Maximum variation in alignment of the live conductor wire on either side of the centre line of track under static condition

i. Maximum

variation of

the live

conductor

wire

Either side of

the centre

line of track

under static

condition

On straight track 200 mm i. As per Rly Board‟Letter No.2011/ CEDO/SD/


ii. ACS No.-7 to the Indian Railway SOD (BG)

2004. chapter V-A Electric Traction ( 25 kV AC

Cycles)

ii. On curves 300 mm

Note: These limits would not apply to special locations like insulated overlaps and out of run wires.

4. Maximum width of pantograph collector : 2030 mm

i. Pantograph Width of

pantograph

collector

2030 mm

Tolerance

of 10 mm

maximum

width is

permissible

i. As per Rly Board‟Letter No.2011/ CEDO/SD/



2004. chapter V-A Electric Traction ( 25 kV AC

Cycles)

Note: A tolerance of plus 10 mm on maximum width specified is permissible to accommodate variation in manufacture and

mounting with respect to the centre line of vehicle.

5. Minimum clearances between live bare conductors / pantographs and structure

It is desirable to provide the maximum possible clearances in the case of lines equipped for 25 kV AC 50 cycles single phase

electric traction.

i. Minimum

clearance

Short Term

Clearances

Vertical and lateral distance

between live and earth

(normally existing only for a

brief period)

200 mm i. As per Rly Board‟Letter No.2011/CEDO/SD/

IRSOD/Elect/02 dated 14.03.2012.


2004. Appendix „A‟ to chapter V-A Electric

Traction ( 25 kV AC Cycles).



Sr.


Observation Action

ii. Minimum

clearance Long term

clearance

Vertical and lateral distance between

live conductor's and earth (which may

remain for a considerable period)

250 mm

i. As per Rly Board‟Letter

No.2011/CEDO/SD/

IRSOD/Elect/02 dated

14.03.2012.

ii. ACS No.-7 to the Indian

Railway SOD (BG) 2004.

Appendix „A‟ to chapter V-A

Electric Traction ( 25 kV AC

Cycles).

a. In order to ascertain whether the requisite clearance would be available under an

existing structure, the permissible height of the contact wire shall first be determined

by competent authority. For this purpose the following particulars should be known

i. Particulars of the structure including profile

ii. Allowance for slewing of track

iii. Allowance for low joints in tracks

iv. Radius of curvature of track under the structure

v Super-elevation of track under the structure

vi. Maximum permissible speed under the structure

vii. Maximum dimensions of over-dimensional consignments which are permissible and safety

measures which would be taken for movement of over-dimensional consignments

viii

.

Location of the structure in relation to level crossings, water columns and turnouts in the

vicinity

ix. Type of overhead equipment

b. After determining permissible height of the contact wire based on above particulars,

the clearance required between the lowest portion of the bridge or structure and the

top most position of the overhead wire shall be determined in each case after study of

the following

i. System of tensioning of the overhead equipment

ii. Atmospheric conditions



Sr. Items Parameter Details Authority

iii. Maximum permissible number of electric locomotives per train (double or triple

headed)

i. As per Rly Board‟Letter No.2011/


14.03.2012.

ii. ACS No.-7 to the Indian Railway

SOD (BG) 2004. chapter V-A Electric


iv. Location of the structure in relation to points and crossings, overlap, spans etc.

v. Length of structure along tracks

vi. Type of structure, girder, masonry etc.

vii. The span of overhead equipment under the bridge

viii. Presence of traction feeder

ix. Likelihood of diesel locomotive halting under' the structure

c. The minimum height of contact wire for a stock height of 4.42 m to be able to

run on all sections electrified with 25 kV A.C. traction system with live

traction overhead equipment

i. Height of the locomotive 4.42 m

ii. Maximum short time clearance to contact wire 0.25 m

iii. Allowance for track maintenance 0.02 m

iv. Minimum height of contact wire (Total) 4.69 m

Note : For OHE span length of 49.5 m or below, the oscillations of contact wire

get reduced to 0.05 m and the minimum height of contact wire in Para 4(a) (iv) can

be reduced to 4.69 m.

d. After determining the minimum height of contact wire on the assumption that

it would permit passage of standard locomotives and stock, the maximum

height of over dimensional consignments (ODC) with the live over head

equipment at speed over 15kmph (when vertical (C) oscillation of overhead

equipment is pronounced) is derived as under



Sr. Items Parameter Details Authority

i. Minimum height of contact wire 4.65 m

i. As per Rly Board‟Letter No.2011/


14.03.2012.

ii. ACS No.-7 to the Indian Railway

SOD (BG) 2004. chapter V-A Electric


ii. Less

iii. Minimum electrical clearance 0.20 m

iv. Track allowance 0.02 m

v. Allowance for' vertical oscillation of contact wire under

influence of moving pantographs

0.05 m

vi. Total 0.27 m

vii. Permissible maximum height of over dimensional

consignment

4.42 m

e. If on Over Dimensional Consignment (ODC) is moved at slow speed not

exceeding 15 kmph, there will be no downward displacement (due to oscillation)

of contact wire. However, to cater for the likelihood of an Over Dimensional

Consignment halting under a structure, a clearance of 0.25 m under rest condition

is to be provided, vide item 1 of Chapter V-A. In this case the derived height of

contact wire may be reduced by 50 mm.

f.

In the case of light structures such as foot-over bridges, it would be desirable to

keep a standard height of contact wire of 5.50 m. In case of heavy structures,

such as flyover bridges or road over bridges, it is desirable to keep the height of

contact wire as low as possible, consistent with the requirements of movement of

Standard Class 'C' Over-Dimensional.

Consignments of height 4.80 m.



Sr.


Observation Action

6. Clearance working

clearance

Between the earthed part of the

installation where men may

work and nearest live part of

any conductor

2 m

ACTM, Vol-II, Part-II. Appendix-I, Para-

3.2. (Page-7)

Treaties Volume-II, Part-4 Chapter 7

Para 4.7.2.5.1(b)

7. Return

conductor

clearance

Static condition Return conductor to any part

which is earthed or likely to be

earthed

150 mm

Dynamic

condition

80 mm

8. Return

conductor and

OHE

Clearance

between return

conductor and

live part of OHE

Return conductor and live part

of overhead equipment under

the worst conditions

400 mm

9. Minimum

electrical

clearance are

not available

Working

clearance not

available

Danger to personnel Earthed

protective

screen to be

provided

10. Height Height of

conductor

Height of any conductor from

ground level

3 m

ACTM, Vol-II, Part-I,Para-20945 (Page-

190)

11. Distance Clearance Distance between any live part

(25 kV) and earth part or part

likely to be earthed

500 mm

12. Minimum

height

Projected fenced Minimum height of any live

part projected beyond the

fenced enclosure.

6.1 m or

more

13. Clearance Clearance from

overhead

equipment

Minimum clearance of 25 kV

feeder crossing OHE of

different elementary section.

2 m

ACTM, Vol-II, Part-II , 22.2 Appendix –

I (Page-37)



3. CADMIUM COPPER CATENARY WIRE

S.No Item Parameters Details Authority

Observation Action

1. Strands of Catenary Wire

i. Strands Maximum number

of parted strands

allowed in section.

i. If strands are broken

upto 20%.

ii. If strands are broken

more than20%.

i. Broken strands

binded by soft copper

wire.

ii. Splice must be done.

ACTM, Vol-II, Part-I , Para-

20326.2 (b) (i) (Page-79)

ii. Strands Maximum number

of parted strands

allowed in section.

i. If strands are broken

upto 03 numbers.

ii. If strands are broken

more than 03

numbers.

i. Broken strands

binded by soft copper

wire.

ii. Splice must be done.

CEDE/ER's letter No.El/94/2

/HWH/SKP dated-21.02.05

(File No.- EL/94/2/ Genl/Vol-

IX , page-65)

2. Properties of cadmium catenary wire

i. Properties Equivalent copper

area

Nominal equi-valent area

of hard drawn copper

53 mm2 Cadmium Copper Conductor

Wire, RDSO Specification

No.ETI/OHE/50 (6/97) ii. Strands and

diameter

No. of strands and

diameter of wire.

19/2.12 mm2

iii. Over all diameter Approximate over all

diameter

10.50 mm

iv. Calculated area Calculated area on

cadmium copper

64.84 mm2




Observation Action

3. Chemical Composition Cadmium Copper Conductor Wire, RDSO Specification No.ETI/OHE/50 (6/97)

i. Catenary

wire

Chemical

composition

Element % ppm

Cu+Ag > 99.99%

Bi+Te+Se < 20 ppm

Pb < 5 ppm

Sb < 4 ppm

As < 5 ppm

Sn+Ni+Fe+Si+Zn+Co < 50 ppm

Oxygen < 450 ppm

ii. Weight Per Km Standard weight per km Standard - 597.3 Kg.

Maximum - 609.2 Kg,

Minimum - 585.3 Kg

iii. Resistance Resistance per km at

200

C

Standard 0.3360 Ohm

Maximum 0.3920 Ohm

iv. Breaking Load Approximate breaking

load of conductor

3920 Kgf

4. Codal life of cadmium catenary wire

Catenary

wire

Codal life Life of cadmium

catenary wire

60 Years Rly Bd's letter No. 2002/AC-

II/I/10 dated 24.5.06 (File No.-

EL/94/0/ Codal Life, page-57)



4. HARD DRAWN GROOVED COPPER (HDGC) CONTACT WIRE


Observation Action

1. Height of Contact Wire

i. Contact wire Standard height of

contact wire at

various locations

i. Regulated OHE (new Lines)

ii. Regulated OHE (old lines)

iii. Un-Regulated OHE

5.60 m

5.55 m

5.75 m

ACTM Vol.-II, Part-II, Para – 7.1

(Page-14)

ii. Contact wire Standard height of

contact wire

Loco sheds / Inspection Pits 5.80 m ACTM Vol.-II, Part-II, Para –

7.2.1 (Page-14)

iii. Contact wire Standard height of

contact wire

Level crossings 5.50 m ACTM Vol.-II, Part-II, Para –

7.2.2 (Page-14)

iv. Contact wire Minimum height Minimum height of contact wire

from rail level to the underside of

live conductor

4.80 m As per Rly BD‟LNo

2011/CEDO/SD/IRSOD/Elect/02

dated 14.03.2012. ACS No.-7 to

the Indian Railway SOD (BG)

2004. v. Contact wire Minimum height in

special case

Minimum height of contact wire,

where locomotives or stocks not

higher than 4.42 m.

4.69 m

vi. Contact wire Tolerance (Except

on over bridge)

In contact wire height ± 20 mm ACTM Vol.-II, Part-II, Para – 7.3

(Page-14)

2. Gradient of Contact Wire

i. Contact wire Gradient Main Line OHE 3 mm/m ACTM Vol.-II, Part-II, Para – 7.4

(Page-15)

ii. Contact wire Gradient Siding Line OHE 10 mm/m ACTM Vol.-II, Part-II, Para – 7.4

(Page-15)




Observation Action

3. Properties of Contact Wire

i. Properties of

contact wire

Area Cross sectional area 107 mm2 Hard Drawn Grooved Contact

Wire, RDSO Specification No.

ETI/OHE/76(6/97) ii. Weight Standard weight per km 951.2 Per Km

iii. Resistance Max. resistance per km at 20 deg C 0.1699 Per Km

iv. Tensile Strength Min. tensile strength 36.5 Kg/mm2

v. Elongation Min. Elongation in 200 mm 3%

4. Chemical composition of contact wire

i. Contact wire Chemical

composition of

wire

Element % ppm Hard Drawn Grooved Contact

Wire, RDSO Specification No.

ETI/OHE/76(6/97) Cu+Ag > 99.95%

Bi < 2 ppm

Te < 2 ppm

Se < 2 ppm

Bi+Te+Se < 3 ppm

Pb < 5 ppm

Sb < 4 ppm

As < 5 ppm

Fe < 10 ppm

S < 15 ppm

Sn+Ni+Fe+Si+Zn+Co < 20 ppm

Cr+Mn+Sb+Cd+As+P < 15 ppm

Oxygen < 230 ppm




Observation Action

5. Thickness of Contact Wire

i. Contact

wire

Thickness by

micrometer

Measure thickness of new contact

wire in vertical direction

12.24 mm ACTM, Vol-II,

Part-I,

Para-20309

(Page-64)

ii. Thickness by

micrometer

Measure worn thickness of new

contact wire in vertical direction

8.25 mm

iii. Thickness by

micrometer

Measure worn thickness of new

contact wire in vertical direction

8.00 mm

iv. Clearance Clearance shall be available between

the bottom points of the dropper clip,

PG Clamp. contact wire splice and the

pan of pantograph

02 mm

v. Thickness by

micrometer

Thickness shall be measured at same

point at each location in successive

years

Measurement should be taken 20

mm before the swivel clip in the

direction of the traffic

vi. Identification

of location

A wide band shall be painted on the

face of the mast

75 mm wide band with black

paint

6. Splice ( RI No. 1080 or 1080-1)

i. Splice Location Minimum distance of splice from

support

5 m ACTM, Vol-II,

Part-I,

Para-20310

(Page-65)

ii. Splice Numbers of

splice

Maximum number of splices in one

tension length

Not more than15 nos.

iii. Splice Distance of

splice

Minimum distance between splices

More than 100 mtrs

iv. Splice Use of splice Provision of old splice Not re- used



S.No Item Parame

ters

Details Authority

Observation Action

7. Codal Life of Contact Wire

i.

Contact wire Codal

life

Life of contact wire 40 Years Rly Bd's letter No. 2002/AC-II/I/10 dated

24.5.06

(File No.- EL/94/0/ Codal Life, page-57)



5. TURNOUTS/CROSSOVERS

S.N o Item Parameters Details Authority

Observation Action

1. Particulars of Turnout/crossover (i.e.1:8½, 1:12 etc.)

i. Turnout/ Cross over

number & type

Measure as per site Measure as per site RDSO Maintenance

Instruction

No.TI/MI/0028 Rev.-2

dated 28.09.2001 ii. Section As per site

Location No. As per site

ii. Date checked As per site

iv. Type of Arrangement - Crossed type/Overlap type Measure as per site

2. Height of contact wire above rail level

i. Height At support at

Obligatory Structure

i. Main line contact wire (mm)

ii. Turnout contact wire (mm)

H

H+50

RDSO Maintenance

Instruction


dated 28.09.2001

3. Obligatory structure

i. Turnout span &

Crossed type

arrangement

Turnout span Measure turnout span 54 m or less

ii. Crossed type

arrangement

Measure turnout span Turnout spans as per

Drg, ETI/OHE/G/02141

Rev.C

ii. Track

separation

For best result,

track separation

Track separation at obligatory

structure

Between 500 mm to 700

mm

iv. Track

separation

As per site condition

track separation

Track separation at obligatory

structure

Between 150 mm to 700

mm




Observation Action

i. Drop bracket Supporting the steady

arm assembly with

steady arm hook

Vertical distance between

register arm axis and contact

plane

300 mm

ii. Drop bracket Steady arm with eye

piece and steady arm

clamp

Distance between register

arm axis and contact plane

250 mm

iii. Implantation At obligatory structure If implantation is less than 3

m, take corrective action to

increase it to 3 m.

03 m

iv. Register arm

tubes

At obligatory structure Register arm tubes of the

bracket assembly are not

displaced.

Horizontal position

v. Clearance Clearance of nearest

obstruction

Measure clearance bracket

insulator, register arm tube

etc. from the dynamic panto

swept zone

more than 100 mm

vi. Electrical

clearance

Between extreme of

panto swept zone and

any nearest earthed

structure

Measure the clearance Not less than 320

mm

4. Height of Contact Wire in Overlapping Zone

i. Height At overlapping zone i. Main line contact wire (mm)

ii.Turnout contact wire (mm)

H1

H1+50

RDSO Maintenance

Instruction


dated 28.09.2001




Observation Action

5. Stagger

RDSO Maintenance

Instruction


dated 28.09.2001

i. Stagger At Obligatory structure i. Main line contact wire (mm)

ii. Turnout contact wire (mm)

200 max

300 max

6. Movement of tower wagon

i. From mainline to turnout i. Take off

ii. Point of take off (in m from

O/S)

650 mm to 720 mm from

centre line of pantograph

to be measured

ii. From turnout to mainline i. Take on

ii. Point of take on (in m from

O/S)

650 mm to720 mm from

centre line of pantograph

to be measured

7. Section Insulator

i. Stagger Stagger of section

insulator

At turnout/crossover +/- 100 mm

ii. Track

separation

At the location of section

insulator

i. Runners towards the centre

of turnout

ii. Runners away from the

centre of turnout

1.65 mtrs Min

1.45 mtrs Min

iii. Section

Insulator

Leveling of runners By sprit level horizontal plane

iv. Sag Sag of section insulator Adjust it to zero by adjustable

droppers of section insulator

and/or by re-droppering the

OHE of the span.

Zero




Observation Action

v. Panto pan Panto passage under

section insulator

Runners are not hit by panto pan.

Smooth passage of

panto pan

RDSO Maintenance

Instruction


dated 28.09.2001

8. Auto- Tensioning Device (ATD)

i. ATD Condition Pull the balance weight with

balance weight downwards

Free to move up

and downwards

ii. ATD Hex tie rod Redundant length of hex tie-rod of

limiting device should be bridged

by inserting pipe of suitable length

on OHE side

As per SMI No.

TI/MI/0035 Rev.1

9. 'G' jumper

i Jumper Distance Distance from obligatory structure 5.6 m RDSO Maintenance

Instruction


dated 28.09.2001

As per Drg. No.

ETI/OHE/G/05102

Rev.C.

ii. Jumper Length Length of jumper 4.0 m

iii. Nuts & bolts PG Clamp Nuts & bolts at PG clamps tighten Neither too tight

nor too loose.

iv. Adjustments done ,if any Note/ attend



6. CURRENT COLLECTION TEST


Observation Action

1. Current collection test by Oliver ‘G’

i. Current

collection

Duration of Current

collection test by

Oliver „G‟

By SSE/ AEE/TRD level Every two months their

entire section

28th MSG TRD at SCR on

Feb 2011 item no. 28.19

CAMTECH/ E/ 11-12/

OHE-Schedule/ 1.0

August, 2011(Chapter 4.2

page 8

ii. Sr.DEE /TRD Entire section once in six

months

iii. Current

collection

Current collection

test by Oliver „G‟

More than 100 units (High

Intensity)

Attend within a week

iv. Between 60 – 100 units

(Medium Intensity)

Attend within a fortnight

v. Between 40 – 60 units

(Low Intensity)

Attend within a month

2. Current collection test by Mirror

i. Current

collection

By Mirror By Depo/OHE in charge

JE/SSE level

Once in three months over

his entire section

ACTM, Vol-II, Part-

I,Para-20324 (Page-77)

CAMTECH/E/11-12/OHE

Schedule/ 1.0August,2011

(Chapter 4.1 page 7

ii. Current

collection

By Mirror By ADEE/TrD with

Depo/OHE in charge

JE/SSE level

Once in Six months over

his entire section

iii. Current

collection

By Mirror Sr.DEE/TrD with Depo

incharge SSE

Once in a year over his

entire Division



7. BONDING & EARTHING

SL No Item Parameters Details Authority

1.i.

ii.

iii.

iv.

Bonds

Bond

Bond

Bonds

Structure Bond

Rail Bond/

Longitudinal

Bond

Impedance

Bond

Connects the traction mast or structure to

the rail by means of M.S. flat strip of size

40 mm x 6 mm.

Connects rail joints across two consecutive

lengths of rails. It is made of M.S. flat strip

of size 40 mm x 6 mm

Bond installed by S & T department, which

provides a low impedance path for the

traction return current and a relatively high

impedance path for track circuit current

Between two rails of a track or two rails of

an adjacent track. It is also called

transverse bond. It is made of M.S. flat

strip of size 40 mm x 6 mm

CAMTECH/E/2008/BE/1.0. April 2009.

Chapter-2, para 2.1.1on page-5

ACTM Vol.-II, Part-II, Appendix II 2.0

(Page-51)


Chapter-2, para 2.1.2 on page-5



Treatise Vol.-II, Part-III, 3.11.7 (Page-149)




(Page-51)

Cross Bonds/

transverse bond

2. Bonds Signal Bond Across the rail joint provided by S&T

department to facilitate flow of track circuit

current.

* Treatise Vol.-II, Part-III, 3.11.7 (Page-

149)

3. Bonds Track Bonding

In station yards elsewhere, where a track is

not wired for its entire length, it shall be

wired for a distance of up to 50 m beyond

the traction mast at which the over head

equipment has been terminated. Rail

bond/cross bond shall be provided for a

distance of up to 50 m beyond the last

traction mast.


(Page-53)




4. Bonds Bonding in

Single Rail

Track circuited

section.

The Traction rail shall be provided with rail

bonds over the entire length and also for a

distance of 50 m on both sides of track circuited

length. In addition the track Rail shall be cross

bonded to the traction rail of the adjacent track

at interval not less than 100 m.

In single line section, provided with single rail

track circuit, the non track circuited rail shall be

provided with rail bond over the entire length

and for a further 50 m on both sides. It shall

also be connected to an earth at distances not

exceeding 100 m from each others. The

connections of the non track circuited rail to

each of the earths shall be made by two separate

mild steel flat strips of size 40 mm x 6 mm

each. The need for providing an earth wire is

thus obviated.




(Page-53)

5. Bonds Bonding in

Double Rail

Track circuited

section

Since no traction rail is available for structure

bonding, an earth wire shall be run on the

traction mast/structure/support. If the length of

the earth wire exceeds 1000 m, it shall be made

electrically discontinuous by providing cut-in

insulator. Each such section of earth wire shall

be connected to an earth at two traction

mast/structure/support at a distance not

exceeding 500 m, apart.




(Page-53 & 54)




No cross bond shall be provided between the

rails of the same track or between the rails of

different track in a double rail track circuited

section.

6. Bonds Bonding adjacent

to TSS/FP

Opposite to the TSS/FP the traction rail shall

be provided with rail bonds for a distance of

1000 m on either sides or cross bonded at

distances of 300, 500, 700 and 1000 m.




(Page-54)

7. Bonds Bonding of

track in loco

sheds and

Loco/EMU

stabling sidings

All traction rails shall be provided with cross

bonds at distance of not more than 100 m

apart. All sidings and/or dead ends shall be

connected by rail bonds. The rails on wooden

or concrete sleeper / support in Loco / EMU

inspection pits shall be provided with rail

bonds for the entire length of the pit and also

upto a length of 50 m on both side and

connected to 10 Ohm earth.




(Page-54)

8. Bonds Bonding of

rails in a tunnel

All traction rails shall be provided with rail

bonds over the entire length inside the tunnel

and wire for a length of up to 50 m, on both

sides outside the tunnel. Besides, a cross bond

shall be provided between the traction rails at

either end of the tunnel.




(Page-54)

9. Bonds Bonding at

level crossing.

All traction rails shall be provided with cross

bonds at only one location within 5 m from

either of the transverse edges of the level

crossing.




(Page-54)




10. Bonds Bonding at oil

depots siding

Both the rails of the siding secondary loop

line shall be provided with longitudinal

bonds. Besides transverse bond shall be

provided between the rails at distance not

exceeding 30 m apart. The rails shall be

connected to an earth at both ends

immediately outside the neutral zone. The

value of earth resistance of the earth

electrode shall not exceed 10 ohm. Each

and every noncurrent carrying part of a

traction mast /structure/support and other

metallic structure in the vicinity shall be

provided with structure bonds. Only copper

rivets shall be used for connection.




(Page-54 & 55)

RDSO's letter No TI/OHE/GA /05 dated

28/29-06-07

(File No.- EL/94 /0/Policy/ Vol-II, Page No.-

234)

11. Bonds Bonding of

Girder bridge

Steel structure of a girder bridge shall be

connected to a A.C traction rail or to an earth

by means of two mild steel flat strip of size

40 mm x 6 mm each. The traction rails on

the bridge shall be connected by cross bonds

at distances not exceeding 100 m apart. In a

single rail track circuited section, the non-

track –circuited rail which is the traction rail

shall be provided with rail bonds and

connected to an earth at either end of the

bridge.




(Page-55)

12. Bonds Bonding of

over line

structure

The metallic parts shall be connected either

to a traction rail or to an earth (10 ohm) by

means of two mild steel flat strips of size 40

mm x 6 mm each.




(Page-55)




13. Bond Bonding of exposed

metallic parts likely to

come into direct contact of

25 kV AC overhead

equipment and located

within a distance of 20 m

from the nearest electrified

track and running parallel

to it for a distance of more

than 20 m

Less than

350 m

Platform structure/

sheds, metallic

fencing, wires, pipes

and such other items,

shall be connected to

an earth or traction rail

CAMTECH/E/2008/BE/1.0. April

2009. Chapter-2, para 2.2.6 on page-10


(Page-55) More than

350 m

Connected to a

separate earth at a

distance not exceeding

350 m apart.

14. Bond Bonding of earthing heels

of isolator switch

The earthing heel of an isolator

switch shall be connected by two

mild steel flats of cross section not

less than 200 mm2 each to the

supporting traction

mast/support/structure which in turn

is connected to a traction rail or earth

wire and to an earth.



ACTM Vol.-II, Part-II, Appendix II

4.3 (Page-56)



8. AUTO TENSIONING DEVICE (ATD)

Sr No ITEM Parameters Details Authority

1. Auto Tensioning Device

i. Winch

Type

Replacement of winch type ATD Should be planned on

condition/ performance

basis.

RDSO's letter No TI/GEN/MTG/ESC 54

dated 7/11-09-06 (File No-EL/94/1/ESC

/Vol-II, Page-131)

ii. Pulley

Type

All future procurement of 3

pulley type ATD

Should be done with

modified pulley groove

arrangement only.

27th

MSG item 27.01

(File No-EL/94/4/16/ RDSO/MSG (27tth

)

/Vol-III, Page-120/1)

2. Counter weight

1. Counter

Weight

Winch type (Conventional)

Winch type (Tram way)

Pulley type (Conventional)

Pulley type Modified (Tram way)

Pulley type (5:1)

400 kg

250kg

665 kg

415kg

400 kg

RDSO‟s specification No- ETI.OHE/48

RDSO Drg. No. ETI/OHE/P/5090-3 Rev - F

RDSO‟s specification TI/SPC/OHE/ATD/

0060 Rev. 1

RDSO Drg. No. ETI/OHE/P/5090-5 Rev - B

Maintenance

1. ATD

Checking

Bearing

Free movement of ATD

Bearing Replacement

By slightly 10 kg force

pushing up or pulling down

the counter weights with the

help of spring balance

Bearings should be replaced

with only SKF 6305 – 2RS1

or NBC 6305-LLU.

RDSO‟s Maintenance Instruction

No.TI/MI/00018 (Rev-3)

2. Hex Tie

Rod

Provision of GI Hex tie rod Provision of 20 mm GI pipe

on hex tie rod of Auto

Tensioning Device

RDSO‟s Maintenance Instruction TI/MI/0035

Rev.1



9. INSULATED CADMIUM COPPER CATENARY WIRE


Observation Action

1. Provision of Insulated Cadmium Copped Catenary Wire

i. Insulated

catenary

Provision of insulated

cadmium copped Catenary

wire

Minimum projection on

either side of over line

structure

2.0 m Special Maintenance Instruction

No. TI/MI/0036 Rev. 0 dated -

08.09.1999

ii.

Insulated

catenary

Purchasing Material specification As per RDSO

specification

RDSO Spec. No.

ETI/OHE/75(4/95)

with A&C Slip No. 1&2.



10. IMPLANTATION (SETTING DISTANCE)


Observation Action

1. Standard implantation for new electrification works

a. Implantation

Main Line

Mast having

single OHE

i. If minimum formation

width in embankment

available is as per SOD Para

16, 17 schedule 1, chapter 1.

ii. If this formation width is

not available, implantation

may be permitted upto 2.5

m without approval of CEE

iii. Upto 2.36 m with approval

of CEE. (ref:- Para 20.1,

page 29 of ACTM 1994)

2.8 m

2.5 m

2.36 m

i. Railway Bd letter no.

2000/RE/161/1 Pt.III

dated 03.11.2010

ii. Your office letter no.

RVNL/BPL/Elect/B

YT-URK/21 dated

22.09.10.

iii. This office letter no.

2006/RE138/4 dated

26.02.10.

iv. ACTM Advance

correction slip no. 20

dated 3.11.10

b. Implantation

In Yard

Mast having

single OHE

If 2.8 m is not available,

implantation can go down

minimum upto 2.36 m

Any specific approval not

required from CEE

c. Implantation

Mast carrying

more than one

OHE

Portal upright & Head span Not less than 3.0 m which

may be relaxed to 2.8 m with

the personal approval of CEE

d. Implantation

Portal Mast carrying more than one

OHE

Not less than 3.00 m ACTM, Vol-II, Part-II,

Appendix-I, 20.1 (Page-

29) e. Implantation TTC Main line 3.00 m

Curve track: The minimum setting distance of masts including portals, head span masts etc. on curve is obtained by adding

the curve allowance and 150 mm slewing allowance to the setting distance. For Trunk routes and main lines,

where the speed may be increased in near future. Curve allowance for maximum speed of 200 kmph.




Observation Action

f. Implantation

Outside

curve

Radius As per

ACTM

As per

Treatise

i. ACTM Vol.-II, Part-II,

Appendix-I, Para-20.2 (Page-

29)

ii. Treatise volume-II,Part –III,

chapter-6, Para3.6.4.2

Radius of curvature greater than or

equal to 875 m

2.50 m

2.80 m

Radius of curvature less than 875 m 2.65 m 2.95 m

g. Inside curve Radius of curvature greater than or

equal to 3500 m

2.90 m 3.20 m


equal to 2350 m but less than 3500 m

3.05 m 3.35 m



3.25 m 3.55 m



3.30 m 3.60 m

2. Masts with Counter Weight

i. Implantation

Masts with

counter

weight

Displacement of counter weight

from the track centre in the worst

condition due to wind transverse

± 50 mm ACTM Vol.-II, Part-II,

Appendix-I Para-20.3, (Page-

32)

3. Implantation of platform mast

i. Implantation

Mast on

platform

Setting of mast on platform Not less than 4.75 m ACTM Vol.-II, Part-II, 20.4

page -32

4. Implantation of obligatory mast

i. Implantation

Obligatory

structure

Turnout Minimum – 3.00 m RDSOs SMI no. TI/MI/0028 Rev-2

ii. Cross- over




Observation Action

5. Implantation of CLS AT Mast

i. Implantation

CLS AT mast Minimum setting distance of the

AT mast

3.50 m RDSO‟s drawing No-ETI/PSI/0036

6. Implantation of Gantry upright

i. Implantation

Gantry

upright

Minimum setting distance of the

gantry upright

4.30 m ACTM Vol.-II, Part-II, 23.2

Appendix-I (Page-38)

7. Colour Light Signal without route indicator. Where there is no approach Signal is provided

i. Implantation

Colour light

signal

Setting distance of mast near signal As per

ACTM

As per

Treatise

i. ACTM Vol.-II, Part-II, Para –

20.5.1,

ii. Treatise 5 (a) Vol. II, Page -

129 ii. Setting distance up to 80 m 3.25 m 3.55 m

iii. Setting distance from 81 m -110 m 3.10 m 3.40 m

iv. Setting distance from 111 m-190 m 3.05 m 3.35 m

v. Setting distance from 191 m -270 m 2.90 m 3.20 m

vi. Setting distance from 271 m -400 m 2.75 m 3.05 m

8. Where approach Signal is provided and signals other than for distant signals

i. Implantation

Colour Light

Signal

Setting distance of mast near signal As per

ACTM

As per

Treatise

i. ACTM Vol.-II, Part-II, Para –

20.5.1,

ii. Treatise 5 (a) Vol. II, Page -129 ii. Setting distance up to 50 m 3.25 m 3.55 m



v. Setting distance from 116 m -160 m 2.90 m 3.10 m

vi. Setting distance from 161 m - 240 m 2.75 m 3.05 m




Observation Action

9. Colour Light Signal with route indicator. With horizontal route indicator.

i. Implantation

Colour Light Signal Setting distance of mast near signal As per

ACTM

As per

Treatise


Para – 20.5.1,

ii. Treatise 5 (a) Vol. II,

Page -129 ii. Setting distance up to 60 m 3.72 m 4.02 m

iii. Setting distance from 61 m-125 m 3.50 m 3.80 m


v. Setting distance from 171 m-215 m 3.05 m 3.35 m

vi. Setting distance from 216 m-250 m 2.90 m 3.20 m

vii. Setting distance from 251 m-310 m 2.75 m 3.05 m

10. With other than horizontal route indicator

i. Implantation

Colour Light Signal Setting distance of mast near signal As per

ACTM

As per

Treatise


Para – 20.5.1,

ii Treatise 5 (a) Vol. II, Page

-129 ii. Setting distance up to 70 m 3.50 m 3.80 m



v. Setting distance from 171 m-215 m 2.90 m 3.20 m

vi. Setting distance from 216 m- 280 m 2.75 m 3.05 m

11. Colour Light Signal located between tracks. Signals without route indicators

i. Implantation Signals without

route indicators

OHE mast in the same line with the

signal may be at a distance

600 m ACTM Vol.-II, Part-II, Para

– 20.5.2 (a) (Page-33)




Observation Action

ii. Implantation

Signals without route

indicators

Drop arm of portal in the

same line with the signal may

be at a distance

600 m

iii. Semaphore signal

located outside the

track, the minimum

setting of mast before

the signal first mast

First mast 3.05 m ACTM Vol.-II,

Part-II, Para- 20.5.3

(Page-34) Second mast 2.90 m

Next three masts 2.75 m

12 Mast on bridge piers

i. Implantation The setting of masts on piers of bridges As large as possible ACTM Vol.-II, Part-II,

Para – 20.6 (Page-34)

ii. Implantation Maximum variation in

setting distance

Check variation from SED If variation above

more than 30 mm

advised to Concerned

P. Way

ACTM, Vol-II, Part-I

Para-20306 (Page-62)

13 Minimum horizontal distance from centre line of the track to face of foundation of OHE Mast/ Portal

For facilitating working of track machine, following dimensions may also be ensured in the new electrification works either

connected with new lines/work of laying multiple lines/RE/gauge conversion:-

i. Horizontal

distance

Minimum horizontal

distance from centre

line of the track to face

of foundation of

OHE/Portals

Below the rail level up to the

formation level of the track on

straight line and curves upto

radius of

875m (2575mm)

Railway Board letter

No. 200/RE/161/1 Pt.III

dated-28.08.2012

ACTM Correction slip

no. 23 dt- 28.08.2012 Below the rail level up to the

formation level of the track on

curves with radius less than

875 m (2725 mm)



11. TRACK CENTRE


Observation Action

1. Spacing of Track NB :- For curve more than 5 degree extra clearance to be calculated and account for

i. Track Centre Minimum distance

of center to center of

track

Existing works 4265 mm Schedule of Dimension (SOD)

Schedule-I, Chapter-I, 1 (Page-4) New works/Addition to

existing work

5300 mm

2. Minimum Horizontal distance from centre of track to any structure except at a platform

i. Track Centre Distance from centre

of track to any

structure except at a

platform


Schedule-I, Chapter-I, 8.0

(Page-5) ii. New works/Addition to

existing work

2360 mm

iii. For Dedicated Freight

Corridor Limited

(DFCL)

2825 mm RDSO‟s letter No.- CT/ DG/DFC

dated 21/26-11-07

(File No.- EL/94/6/ Freight Corridor)

(Page-113)

3. Spacing of Track for yard

Note:

i. For spacing of 5300 mm, extra clearance upto 5 degree has been accounted for. Extra clearance for curves more than 5

degree are to be calculated and accounted for.

ii. New/additional works cove lying of a new line. Extension of existing for replacement of points & crossings will not be

treated as new track.

i. Track Centre Distance center to

centre of track for

yard


Schedule-I, Chapter-II, 1(i) Page - 10

ii. New works/ Alteration to

existing work

5300 mm




Observation Action

4. Workshop and Running sheds

Note :

Where there is a structure between tracks, the distance of center to center of tracks is to be increased by the amount of the

width of the structure like OHE post etc.

i. Track Centre Distance center to centre

of track

Existing works 4570 mm

Schedule of Dimension (SOD)

Schedule-I, Chapter-III, 2

(Page-17)

New works / Alteration

to existing work

4570 mm

ii. New works or alterations

to existing works

In workshop 4570 mm

Running sheds 5260 mm

5. Tunnels, Through and semi through girder bridges

i. Track Centre Distance center to centre

of track

Existing works 4.495 mm Schedule of Dimension (SOD)

Schedule-I, Chapter-I, 13 (Page-8)

New works/Addition to

existing work

4.725 mm



12. HEIGHT OF FOB/ROB

Sr.No. Item Parameter Details Authority

Observation Action

1. Height of ROBs & FOBs During Railway Electrification Work

a. Height of

ROBs & FOBs

Railway Electrification work Minimum height above rail

level for a distance of 915mm

on either side of the centre of

track for overhead structures

4875 mm i. Railway board letter

No.

2011/CEDO/SD/IRS

OD/Elect./02 dated-

14.03.2014

ii. Addendum &

corrigendum slip

(ACS) No. 7 dated-

14.03.2014. Indian

Railway SOD (BG)

2004

Where D.C. electric traction

is in use or is likely to be

used, this dimension shall be

5410 mm

b. For new overhead structure and

alteration to existing overhead

structures

Light overhead structures,

such as foot over bridges

6250 mm

Heavy overhead structures,

such as Road over bridges

5870 mm

c. Height of

ROBs & FOBs

for existing

overhead

structures

Wherever feasible, the height of

contact wire shall be as high as

possible, under the overhead

structures, to allow the passage of

Over Dimensional Consignment/

rolling stock of 4.8 m height. (For

4.8 m height of rolling stock/over

dimensional consignment)



6250 mm

Heavy overhead structures,

such as road over bridges

5870 mm



Sr.No. Item Parameter Details Authority

Observation Action

d. Existing

overhead

structures

Under restricted height of overhead

structure, the minimum height above rail

level for a distance of 1600 mm on either

side of the centre of track for 4.8m height

of contact wire from rail level



5270 mm i. Railway board letter

No.

2011/CEDO/SD/IRS

OD/Elect./02 dated-

14.03.2014

ii. Addendum &

corrigendum slip

(ACS) No. 7 dated-

14.03.2014. Indian

Railway SOD (BG)

2004

Heavy overhead

structures, such as road

over bridges

5070 mm

Note: See Appendix for extra clearance required on curves.

i. Extra

clearance

In case of existing structures, a special study shall be made, which will be accepted by

the concerned Electrical Inspector of the Railways, as indicated in Appendix-A to

Chapter V-A before 25 kV A.C. traction is introduced.

ii. In areas where 25 kV AC traction is used or likely to be used, if any turnout or

crossover is located under a heavy overhead structure or within 40 m from its nearest

face irrespective of the position of level crossing gate, the minimum height of such

overhead structure shall be 6250mm*. Also, in case the turnout is beyond 40 m but

the level crossing gate is within 520 m from the nearest face of the bridge, the height

of such overhead structure shall be 6250mm*.

iii. The height mentioned against items 10(a), 10(b) & 10(c) above shall be measured

from the higher or super-elevated rail.

iv. On lines proposed to be electrified on 25 kV A.C system and also in other sections,

necessary provision shall be made in overhead structure and overhead equipment, if

necessary by using longer traction overhead equipment masts to permit an allowance

of 275 mm for raising of track in connection with the introduction of modern track

structure in future and for catering to increased ballast cushion, forger sleeper

thickness and deeper roil sections.

*(Under restricted situations, the minimum height shall be 5270 mm for 4.80 m high

contact wire)



13. POWER LINE CROSSING

I - Clause 17.3 (ACTM VoLII, Part.II), Appendix-IV (Regulations for Power Line Crossings of Railway Tracks 1987) to be

replaced as under:


1.(a) 17.3 (a) Vertical Clearance for OHE (Other than high rise OHE):

Vertical clearances

for OHE (Other

than high rise

OHE)

Minimum clearance from Rail Level Advanced correction Slip No. 27,


no.2015/RE/138/4/ FTS - 137487

dated - 06.05.2016

Overhead crossing voltage Existing Power Line Crossing for

existing non-Electrified line

i. Up to & including11 kV By Cable

ii. Above 11 kV up to 33 kV 10860

iii. Above 33 & upto 66 kV 11160

iv. Above 66 & upto 132 kV 11760

v. Above 132 kV & upto 220 kV 12660

vi. Above 220 KV & upto 400 kV 14460

vii. Above 400 kV & upto 500 kV 15360

viii. Above 500 kV & uoto 800 kV 18060

b. Vertical clearances

for OHE (Other

than high rise

OHE)

Overhead crossing voltage New Power Line Crossing( for

Electrified or non electrified

routes) or existing Power Line

Crossing planned for alteration or

modification (for electrified or

non electrified routes)

i. Up to & including11 kV By cable








vi. Above 220 KV & upto 400 kV 18260



2. Clearances required for 25 kV AC traction

Vertical clearances

for power line

crossings of

Railway tracks

Overhead crossing voltage Minimum clearance

to be maintained

between lowest

transmission line

crossing conductor

and Railway

structure as per

clause 61 CEA

Minimum clearance

to be maintained

between lowest

transmission line

crossing conductor

and Railway

structure as per

clause 61 CEA

Advanced correction

Slip No. 27, Railway

Board letter

no.2015/RE/138/4/ FTS -

137487 dated -

06.05.2016

At Structure At Mid Point

i. Up to & including11 kV By Cable

ii. Above 11 kV up to 33 kV 3700 2440

iii. Above 33 & upto 66 kV 4000 2440

iv Above 66 & upto 132 kV 4600 3050

v. Above 132 kV & upto 220 kV 5500 4580

vi. Above 220 KV & upto 400 kV 7300 5490

vii.. Above 400 kV & upto 500 kV 8200 7940

vii. Above 500 kV & uoto 800 kV 10900 7940




3. a. 17.3 (a) Vertical Clearance for OHE (High rise OHE):

Vertical Clearance

for OHE (High rise

OHE)

Overhead crossing voltage Minimum clearance from Rail level

Advanced correction


Board letter

no.2015/RE/138/4/

FTS - 137487 dated -

06.05.2016

Existing Power

Line Crossing for

existing non-

electrified line

New Power Line

crossing

(electrified/non-

electrified routes) or

existing Power Line

crossing planned for

alteration or

modification

(electrified/non-

electrified routes)

i. Up to & including11 kV Normally

clearances

mentioned in 4 are

applicable for

double stack

container routes

however EIG may

relax as per clause

21.4

By Cable





v. Above 220 KV & upto 400 kV 20260



b. Vertical Clearance for OHE (High rise OHE

Vertical clearance

for OHE (High rise

OHE)

Overhead crossing voltage Minimum clearance to be maintained

between highest traction conductor and

lowest transmission line crossing

conductor




At structure as per

clause 61 CEA

At mid span as per

clause 69 CEA

Advanced correction


Board letter

no.2015/RE/138/4/


06.05.2016

i. Up to & including11 kV By underground cable

ii. Above 11 kV up to 33 kV 3700 2440

iii. Above 33 & upto 66 kV 4000 2440

iv. Above 66 & upto 132 kV 4600 3050

v. Above 132 kV & upto 220 kV 5500 4580

vi. Above 220 KV & upto 400 kV 7300 5490

vii. Above 400 kV & upto 500 kV 8200 7940

viii. Above 500 kV & uoto 800 kV 10900 7940

Note : Applicable for 17.3 (a) & (b) Advanced correction Slip

No. 27, Railway Board

letter no.2015/RE/138/4/


06.05.2016

i. All heights/clearances are in mm under condition maximum sag.

ii. For existing power line crossing

(a) In case of new line (with or without electrification) column 4 shall be applicable.

(b) Dimension at column 5 are applicable if the nearest OHE structure/fixed structure is within 6000 mm

from overhead crossing conductor. In other cases, dimensions at column 6 are applicable.

iii. If crossing is provided with guarding, a minimum clearance of 2000 mm shall be maintained between

bottom of the guard wire and highest traction conductor.

iv. Height of the double stack container to be taken as 7100 mm.

4. Relaxation for existing power line crossings Clause 21.1, 21.2, 2E3 & 21.4 will be replaced as below

i.

Clause 21.1

Power line crossing in station area and yards to be avoided. Under un

unavoidable circumstances, relaxation by EIG will be necessary.

Advanced correction Slip

No. 27, Railway Board

letter no.2015/RE/138/4/


06.05.2016




ii. Clause 21.2 For electrification works of existing lines and existing electrified lines, existing

power lines crossing can continue. If dimension are as per column (5) & (6)

above. EIG of the concerned Railway to ensure fulfillment of vertical clearances

at column (5) & (6), with additional safeguards if necessary. Wherever feasible,

special design of traction overhead equipment, return conductor, 25 kV feeder

line be developed keeping in view the need for economy.

iii. Clause 21.3

All new power line crossing, whether in electrified and non – electrified

territories, must satisfy the dimensions as mentioned at column 4, 5 & 6.

iv. Clause 21.4

In case of non- electrified line in double stack container route all efforts should

be made for maintenance of dimensions as per column 4. However EIG may

issue relaxation with suitable safeguards on a case basis, after ensuring vertical

clearances as per dimensions in column 5, considering height of double stack

container as 7100 mm from rail level. power line crossing

II - Clearance for Power Line Crossings Including Telephone Line Crossings of Railway Tracks (Para-11(i), Chapter-I,

Schedule I of SOD 2004 BG)


Clearance For Power Line Crossings Including Telephone Line Crossings Of Railway track (Para-11(i), Chapter-I,

Schedule I of SOD 2004 BG) (Page-7, 8 to IRSOD 2004)

Minimum height above rail level of the lowest portion of any conductor of crossing, including guard wire, other than

telegraph, telephone and other such low tension wires or traction trolley wire, under conditions of maximum sag shall be as

follows

a. For Existing

Power Line

Crossings

Overhead crossing voltage Minimum clearances from

Rail Level in mm

Addendum & corrigendum slip (ACS)

No. 7 Indian Railway of SOD.

Railway Board letter No.


dated- 14.03.2012




i. Up to & including 11 kV By cable

ii. Above 11 & up to 66 kV 14100

iii. Above 66 & up to 132 kV 14600

iv. Above 132 kV & up to 220 kV 15400

v. Above 220 KV & up to 400 kV 17900

vi. Above 400 kV & up to 500 kV 19300

vii. Above 500 kV & up to 800 kV 23400

b. For New Power Line Crossings or Alteration to Existing Power Line Crossing in electrified

Vertical clearances for

power line crossings of

Railway tracks

Overhead crossing voltage Minimum clearances required

from rail level

Addendum & corrigendum slip

(ACS) No. 7 Indian Railway of

SOD. Railway Board letter No.


2 dated- 14.03.2012

Clearance at

OHE Structures

in mm

Clearance at

Mid OHE

span in mm

i. Upto & including 11 kV By Cable

ii. Above 11 & up to 33 kV 14660 12384

iii. Above 33 & up to 66 kV 14900 12384

iv. Above 66 kV & up to 132 kV 15560 12994

v. Above 132kV & up to 220 kV 16460 14524

vi. Above 220 KV & up to 400 kV 18260 15434

vii. Above 400 kV & up to 500 kV 19160 17884

viii. Above 500 kV & up to 800 kV 21860 17884




c. For Power Line Crossings in Non-Electrified sections

Vertical clearances

for power line

crossings of

Railway tracks

Overhead crossing voltage Minimum clearance on

existing routes from

rail level for new track/

additional line or gauge

conversion when line Is

not anticipated to be

electrified in mm

Minimum clearances

from rail level for

new power line

crossing or

alternation to

existing power line

crossing in mm

Addendum &

corrigendum slip

(ACS) No. 7 Indian

Railway of SOD.


No. 2011/CEDO/

SD/IRSOD/Elect/02

dated- 14.03.2012


ii. Above 11 & Up to 33 kV 10860 14600

iii. Above 33 & up to 66 kV 11160 14960

iv. Above 66 & up to 132 kV 11760 15560

v. Above 132kV & up to 220 kV 12660 16460

vi. Above 220 KV & up to 400 kV 14460 18260

vii. Above 400 kV & up to 500 kV 15360 19160

viii. Above 500 kV & up to 800 kV 18060 21860

d. Minimum Clearance Between Highest Traction Conductor & Lowest Crossing Conductor

Clearances Between

Highest Traction

Conductor & Lowest

Crossing Conductor

Overhead crossing voltage Minimum clearance between highest traction

conductor and lowest crossing conductor (as

per I.E Rule 1956,CI. 80)


ii. Above 11 & up to 66 kV 2440




iii. Above 66 & up to 132 kV 3050

iv. Above 132kV & up to 220 kV 4580

v. Above 220 KV & up to 400 kV 5490

vi. Above 400 kV & up to 500 kV 7940

vii. Above 500 kV & up to 800 kV 7940

Note – i. All height/clearances are in mm and under maximum sag conditions

ii. Clearances at mid OHE span (Column-4) in Para 11(i)(b) can be adopted if the OHE

structure/fixed structure is beyond 6000 mm of nearest conductor of overhead crossing.

iii. If the crossing is provided with a guarding, a minimum clearance of 2000 mm shall be

maintained between the bottom of the guard wire and highest traction conductor.

iv. Power line crossing in. yards & stations area shall be avoided.

Para- 11(ii) Minimum clearance between any conductor not adequately insulated and any

railway structure under most adverse conditions

Crane working

under overhead

Voltage Minimum clearance in

mm

i. Up to and including 650 volts 2500

ii. Above 650 volts and up to & including 33 kV 3700

iii. Above 33 kV and up to & including 66 kV 4000

iv. Above 66 kV and up to & including 132 kV 4600

v. Above132 kV and up to & including 165kV 4900

vi. Above 165 kV and up to & including 220 kV 5500

vii. Above 220 kV and up to & including 400 kV 7300

viii. Above 400 kV and upto & including 500 kV 8200

ix. Above 500 kV and up to & including 800 kV 10900




Para (iii). Minimum height above rail level for telegraph, telephone and other such low tension

wires crossing a railway – 6100 mm

Para (iv). Minimum Horizontal Distance Of Structures

The minimum horizontal distance measured at right angles from the centre of nearest track to any port

of a structure carrying electrical conductors crossing a railway shall be : For existing work

i. From rail level to 305 mm above rail level 1675 mm

ii. From 305mm above rail level to 4420mm above rail level and

beyond

2135 mm

(a) For rigid and well founded post/ structure, it‟s fitting and projections : For existing work

i. From rail level to 305 mm above rail level 1905 mm

ii. From 305mm above rail level to 4420mm above rail level and

beyond

2360 mm

Note : Any post/structure which is so constructed or guyed as to remain in a vertical position, or

failing this to continue to provide the clearances specified above, with one or all of the

conductors broken with its conductors attached, when subjected to maximum wind pressures,

may be considered to be a "rigid well founded post/structure",

(b)

However, for other structures not covered in (a) above, it shall be equal to the height of structure

in meters above ground level plus 6 meters.



14. STAINLESS STEEL WIRE ROPE

Sr No Item Parameters Details Authority

Observation Action

1. SS Wire Rope Check

i. SS Wire

Rope

Condition of stainless

steel wire rope by

Magnifying Glass

For loose wires/

strands, broken wires/

strands, rusting,

pitting/ corrosion and

bird caging

Replaced immediately

with new lubricated

wire rope

RDSO/No.TI/MI/00018 Rev-3.

dated 01.04.2006


Dated 01.04.2006

ii. Ovality of

SS wire

rope

checked at three places

(near pulleys) 300 mm

apart by measuring rope

diameter at right angles

If ovality is found

more than 0.51 mm,

wire rope

Replaced immediately

with new lubricated

wire rope


dated 01.04.2006


Dated 01.04.2006

iii. Special care of SS wire

Rope

Inserting the wire rope

in SS wire rope end

fitting.

The strands of wire

rope should not be open

out while reeving over

the wedge piece.


dated 01.04.2006-3. Dated 01

RDSO/No.TI/MI/0029

Rev.04.2006

iv. SS Wire

Rope

End reversal --- During each POH

2. Recommended Practices of SS Wire Rope Lubrication during AOH

i. SS wire

rope

Lubrication on Rope Proper lubrication of

each wire & strands of

wire rope with

adequate pressure

Lubricated the wire

ropes with lubricant

“BALMEROL

ROPELUBE 1000

RDSO/TI/IN/0015 Rev „0‟

dated 01.02.2010

RDSO/No.TI/MI/0029 Rev.04.

2006

ii.

SS wire

rope

Cleaning of SS wire

rope by a jet of air and

wire brushing methods

Rope should be dried

and cleaned

Lubricated the wire


“BALMEROL

ROPELUBE 1000


dated 01.02.2010

RDSO/No.TI/MI/0029 Rev.04.

2006



Sr No Item Parameters Details Authority

Observation Action

iii. SS wire

rope

Lubrication on rope Straight portion if the

rope towards counter

weight (leaving 250

mm vertical length of

rope from center line

of mast side pulley

towards counter

weight)

Lubricated the wire


“BALMEROL

ROPELUBE 1000 by

brush/swabbing


dated 01.02.2010

RDSO/No.TI/MI/0029

Rev.04.2006

iv. SS wire

rope

Re- lubricant Should be carried out

regularly

Wire rope replaced

after first damage has

been ascertained.


dated 01.02.2010

RDSO/No.TI/MI/0029

Rev.04.2006

3. Equipments Recommended for lubrication during AOH

i. Wire brushes RDSO/TI/IN/0015 Rev „0‟

dated 01.02.2010

ii. Spray gun

iii. Lever operated grease gun

4. Recommended Practices for Lubrication during POH

i. SS wire rope Rope should be dried

with a jet of air and

cleaned with wire

brushing methods

Rope should be passed under

the pulley submerged in the

lubricant. Lubricant can also

be applied through spray gun

or spray nozzle on the rope

passing over the pulley

Lubricant can

also reach to all

the wire.


dated 01.02.2010

RDSO/No.TI/MI/0029

Rev.04.2006



15. DROPPER AND ENCUMBERANCE


Observation Action

1. Types of Droppers

i. Dropper Arrangement of

droppers

Dropper assembly To be used RDSO Drg no. ETI/OHE/P/1190

ii. Dropper Distribution of

droppers

In Span Droppers To be used RDSO Drg no. ETI/OHE/G/00161

iii. Dropper Special Dropper Provided in special case

wherever unavoidable

To be used RDSO Drg no. ETI/OHE/P/1400

iv. Dropper Girder bridge Dropper is provided on the

girder bridge where the

OHE is supported on

member of girder bridge

To be used RDSO Drg no.ETI/OHE/P/1410

v. Dropper Rigid Dropper It is made of contact wire,

where dip is not available

It should not be adopted

on main running line

ACTM, Vol-II, Part-II,Appendix-1

Item -10.4 (Page-18)

vi. Dropper Minimum dropper

length

Minimum Encumbrance 150 mm ACTM, Vol-II, Part-II,Appendix-1

Item – 9.3 (Page-18)

vii. Dropper Minimum dropper

length with loop

If the shortest dropper is

loop type and more than

150 mm

No speed restriction ACTM, Vol-II, Part-II,Appendix-1


viii. Dropper Minimum dropper

length with loop

If the shortest dropper is

without loop or of rigid

type or less than 150 mm

OHE is suitable up to

90 km/hr. speed

ACTM, Vol-II, Part-II,Appendix-1


ix. Dropper Dropper material Electrolytic Copper Hard

drawn

- ACTM, Vol-II, Part-II,Appendix- X

Page- 235




Observation Action

x. Dropper Diameter Diameter of in-span

dropper

5 mm Handbook on principle of Design of

25 kv AC OHE Chapter -2, para

2.18.1, page- 43

xi. Dropper Diameter Diameter of inclined

dropper

7 mm Handbook on principle of Design of

25 kv AC OHE Chapter -2, para

2.18.2, page- 45

xii. Dropper Spacing of „A‟ dropper

tolerance (1st dropper from

the support) is

± 30 mm (As per RDSO latter no.

TI/OHE/GA/3013 dated 14.05.13)

xiii. Dropper Length of „A‟ dropper

tolerance (1st dropper from

the support)



xiv. Dropper Length of other droppers

tolerance



xv. Dropper Spacing of other dropper

tolerance



xvi. Dropper Distance of 2nd

dropper

from 1st dropper in 60 m

non standard span length

5.25 m

xvii. Dropper Dropper distance

from support

First dropper Always provide 2.25 m

apart from centerline of

support

Treatise vol 2 part iii & iv Chapter 2

para 4.2.1 page 214

xviii Dropper Dropper distance

from support

Second dropper Always provide either

6.75 m or 9.00 from

first dropper depending

upon the length of

standard span selected

Treatise vol 2 part iii & iv Chapter 2

para 4.2.1 page 214




Observation Action

xix. Dropper Dropper distance

from support

Third dropper Other droppers are

spaced 9.00 m apart.

Treatise vol 2 part iii & iv Chapter

2 para 4.2.1 page 214

xx. Dropper Non-standard

spans droppers

Droppers at girder bridges.

Droppers are spaced as

per dropper calculations.

Treatise vol 2 part iii & iv Chapter

2 para 4.2.1 page 214

xxi. Encumb

rance

Normal

Encumbrance

Used at single cantilever

structures

1.4 m ACTM, Vol-II, Part-II, Appendix-1


xxii. Encumb

rance

Overlaps

Encumbrance

Encumbrance of 0.4 m, 0.75

m and 0.9 m are used

To get adequate

mechanical and electrical

clearances

Handbook on principle of Design

of 25 kv AC OHE Chapter -2, para

2.16, page- 41

xxiii. Encumb

rance

Over line

structure

Encumbrance

Encumbrance of 0.6 m, 0.5

m and 0.4 and 0.3 m are

used

To get adequate electrical

clearances



16. HEIGHT GAUGE


Observation Action

1. Height gauge Height Height of the top member of level

gauge above the road

Not more

than 4.67 m

ACTM, Vol-II, Part-II, Appendix -

VII 2 (e) (Page-151)

2. Height gauge Minimum

distance

Minimum distance of rail height

gauge from the nearest track

8 m Question Bank of OHE (

CAMTECH/E/13-14/QB/TRD/OHE/

1.0, Chapter-6- item 6.16



17. OVER DIMENSION CONSIGNMENT (ODC)


Observation Action

1. ODC

i. ODC Any package before

loading exceeds the

following dimensions,

is called “ODC” or

“out of gauge” load

Length 13716 mm ACTM,Vol-I, 10434

(Page-46)

Height at center 2743 mm

Height at corners 2134 mm

Width 2997 mm

Top width 610 mm

2. Classification of ODC

i. ODC 'A' Class ODC having clearance of 230 mm

and above from fixed structure

Treatise Vol. II, 3.2.2

Page – 5

ii. 'B' Class ODC having clearance of 150 mm

and above but less than 230 mm

from fixed structure

iii. 'C' Class ODC having clearance of less than

150 mm but more than 80 mm

from fixed structure

3. Movement of ODCs in 25kV AC electrified sections

Movement of ODC shall be undertaken only after sanction of competent authority has been obtained.

i. Movement

of ODC

.A' Class Gross clearance more than 250

mm

No speed restriction

required


Page – 5




Observation Action

ii. 'B' Class Gross clearance between 250

mm - 200 mm.

A representative should

accompany to supervise safe

movement of the ODC.

15 kmph speed

restriction to be

imposed and ODC

would not be stopped

under critical locations


Page – 5

iii. 'C' Class Gross clearance less than 200 mm

but more than 100 mm.

A representative should

accompany to supervise safe

movement of the ODC

15 kmph speed

restriction to be

imposed with OHE

power must be

switched off.

iv. No movement of ODC Gross clearance less than 100 mm ODC movement not

permitted



18. MAXIMUM MOVING DIMENSION (MMD)


Observation Action

1. Rolling Stock (Carriage & Wagon)

i. Maximum

Moving

Dimension

Maximum width for

passenger vehicles

Maximum width over open doors,

including all projection for passenger

vehicles

4.04 m Schedule of Dimension

(SOD) Schedule-I, Chapter-

IV (A), 27 (Page-21)

ii. Maximum width for

goods vehicles

Maximum width over open doors,

including all projection for goods vehicles

(Doors of horse boxes, brake vans, luggage

vans raising and falling flap doors of

Goods wagon are exempted from this rule



IV (A), 28 (Page-21)

iii. Maximum height

above rail level

Maximum height above rail level for a

width of 760 mm on either side of the

centre of unloaded vehicle

(Destination boards for passenger vehicle

may project 76 mm above the dimensions

upto maximum height above rail level at

sides when empty)



IV (A), 29 (Page-21)

2. Rolling Stock (3660 mm width) (EMU width is also 3660 mm)

i. Maximum

Moving

Dimension

Width Maximum width 3.66 m Schedule of Dimension


IV (B), 1 (iv)(Page-23)




Observation Action

ii. Maximum width for

passenger vehicles

Maximum width over open doors, including

all projection for passenger vehicles

4.495 m Schedule of Dimension (SOD)

Schedule-I, Chapter-IV (B), 2

(Page-23)

iii. Maximum width for

goods vehicles

Maximum width over open doors, including

all projection for goods vehicles



(Page-23)

iv. Maximum height

above rail level

Maximum height above rail level for a width

of 915 mm on either side of the center of

unloaded vehicle



(Page-23)

3. Rolling Stock (Locomotive)

i. Maximum

Moving

Dimension

Maximum width

from rail level when

fully loaded and

empty

Maximum width from 1170 mm above rail

level when fully loaded to a height of 3735

mm when empty.


Schedule-I, Chapter-IV (C), 11

(iv) (Page-25)

ii. Maximum height on

either side of empty

locomotive

Maximum height (above rail level for a width

of 760 mm on either side of center of empty

locomotive.


Schedule-I, Chapter-IV (C), 12

(Page-25)

iii. Maximum width (X-

Class locomotives)

Maximum width (X- Class locomotives) from

1145 mm above rail level when fully loaded to

a height of 3735 mm when empty.


Schedule-I, Chapter-IV (C),

14(iv) (Page-25)

iv. Maximum height Maximum height (X-Class locomotives)

(above rail level for a width of 305 mm on

either side of center of empty locomotive.


Schedule-I, Chapter-IV (C),

15,(Page-25)




Observation Action

4. MMD for Dedicated Freight Corridor

i. Maximum

Moving

Dimension

Maximum width

with fully loaded

Maximum width over all projections from

305 mm above rail level, to 725 mm above

rail level, when fully loaded.

3.505 m

RDSO‟s letter No.- CT/

DG/DFC dated 21/26-11-07

(File No.- EL/94/6/ Freight

Corridor) (Page-114)



19. WIND LOAD


Observation Action

1. Wind Load

i. Wind Load Wind Zone Green Zone (light) 75 kg / m2

ACTM, Vol-II, Part-II ,

Appendix- I, para 4.1 (Page

No- 7) ii. Wind Load Wind Zone Yellow Zone (medium) 112.5 Kg / m2

iii. Wind Load Wind Zone Red zone ( Heavy) 150 Kg / m2

iv. Wind Load Loading

calculation

Rolled beams total projected area ACTM, Vol-II, Part-II ,


No- 8) Fabricated structures one and a half times the

projected area

Conductor and other

circular members

2/3 of the projected area

v. Safety Safety of mast Safety of mast and portal

are checked for two

conditions

At 350

C temperature and full

wind pressure

ACTM, Vol-II, Part-II ,


No- 8) At 4

0 C temperature and 20%

of the governing wind

pressure



20. CODAL LIFE (OHE ASSETS)

S.No. Class of Assets Average Life in Years Authority

1. OHE conductors & components – for normal zone Board‟s Letter no. 2002/ACII/1/10 ( Vol.II ) dated

25.02.2009

(Advance correction slip no.101) a OHE fixed structure

Mast/structure/guy road / foundation 80

b Other than fixed structure

i. Cantilever assembly and all types of

insulator

40 Board‟s Letter no. 2002/ACII/1/10 ( Vol.II ) dated

25.02.2009 (Advance correction slip no.101)

ii. Isolator/ATD 30

c Wires

i. Catenary wire/feeder wire/return

conductor

60 Board‟s Letter no. 2002/ACII/1/10 ( Vol.II ) dated

25.02.2009 (Advance correction slip no.101)

ii. Contact wire 40 or on the basis of

condemning diameter

2. OHE conductors & components – for polluted zone

i. Cantilever assembly and all types of

insulator

On condition base

ii. ATD On condition base



21. TWO TRACK CANTILEVER (TTC)


Observation Action

1. Drop Arm

i. Drop arm Style „A‟ It is used on N, O, G, BFB type

portal. Made of 6”x6” BFB

6”x 6” BFB drop arm is

suitable for single and

single back to back

bracket

Treatise volume II, Part-3,

para3.5.13, item- 6 and RDSO‟s

Drg no. ETI/C/0076

ii. Drop arm Style „B‟ It is used in two track

cantilever

8”x 6” RSJ drop arm is

suitable for multiple back

to back brackets

iii. Drop arm 8”x 6” RSJ

Three Cantilever arrangement At a distance of 6.5 m

from face of TTC upright

RDSO‟s letter no. TI/CIV/MS/12-

dated 22nd

May 2012

iv. Drop arm 8”x 6” RSJ

Three Cantilever arrangement

on 8 m boom

Away from 6.5 m from

TTC upright is to be

unsafe and unstable

2. Boom is found to be safe if 3 cantilevers are provide on two Drop Arm

i. Drop arm 8”x 6” RSJ

One Drop arm is to be

provided with one cantilever

At the midpoint of boom

(TTB)

RDSO‟s letter no. TI/CIV/MS/12-

dated 22nd

May 2012

ii. Drop arm 8”x 6” RSJ

Another drop arm is to be

provided with two cantilever

arrangement.

at farthest end of 8 meters

boom

iii. Drop arm 8”x 6” RSJ

Single or Double Cantilevers is

to be provided on single drop

arm

At a distance of 7.5 meters

from upright.

iv. TTC TTC OHE arrangement On TTC RDSO Drawing No. ETI/C/0076 &

ETI/C/0013/69.

v. TTC Span length Anchor span Not less than 54 m As per RDSO guide line Para 5,5(vi)

of ACTM, Volume-II, Part-II]



22. THERMO VISION CAMERA


Observation Action

1. Condition based maintenance

i. Thermal

imaging

infrared

camera

Check hot spots, heat

development on

loose connections at

OHE ghat section

i. All types of jumpers and their PG clamps

ii. Catenary splice, „U‟ clamps and bulldog

clamps

iii. Contact splices

iv. Isolators contacts, connectors, jumpers

and their PG clamps

v. Feeder wire jumpers connected with

OHE and their PG clamps

Depot /OHE in-

charge (SE/JE)

should inspect his

entire section

once in a six

months

28th MSG TRD at

SCR on Feb 2011 item

no. 28.19

ii. Thermal

imaging

infrared

camera

Check hot spots, heat

development on

loose connections at

OHE Section

i. All types of jumpers and their PG clamps

ii. Catenary splice, „U‟ clamps and bulldog

clamps

iii. Contact splices

iv. Isolators contacts, connectors, jumpers

and their PG clamps

v. Feeder wire jumpers connected with

OHE and their PG clamps

Depot /OHE in-

charge (SE/JE)

should inspect his

entire section

once in a year

28th MSG TRD at SCR

on Feb 2011 item no.

28.19



23. STAGGER


Observation Action

1. Stagger contact wire and catenary wire

i. Stagger tangent Contact wire Stagger on tangent track at

support

± 200 mm

ACTM, Vol-II, Part-II Appendix –

I, Para-8.1 (Page-16)

ii. Stagger tangent Catenary wire Stagger on tangent track at

support

Zero ACTM, Vol-II, Part-II Appendix –


iii. Stagger curve Catenary wire Stagger curved track at

support

Not exceed (± 300

mm)



iv. Stagger curve Catenary wire

standard

Stagger curved track at

support

Zero, ± 200 mm


I, Para-8.3 (Page-16) and drg no.

ETI/OHE/G/00202

v. Stagger section

insulator

Section

insulator

Staggers at section insulator

type neutral section

Normally zero, exceed

± 100 mm


I, Para-11.1- iii (Page-18)

vi. Stagger PTFE PTFE Stagger at PTFE type

neutral section

Zero at support ACTM, Vol-II, Part-II Appendix –

I, Para-8.7.2 (Page-17)

vii. Stagger T/O &

Diamond

crossing

Catenary wire Stagger at turnouts and

diamond crossing

Branch line not

exceed 300 mm at any

point in the span

2. Stagger at Un- insulated overlaps

i. Stagger tangent

(3-span)

Contact wire Stagger in running line on

tangent track at support.

Only one contact wire is in-

running

Not exceed 200 mm ACTM, Vol-II, Part-II Appendix –I,

Para-8.5 (Page-16) and drg.

no.RE/33/G/02121 sheet-1




Observation Action

ii. Stagger curve

(3-span)

Contact wire Stagger in running line on

curve track at support. Only

one contact wire is in- running

Not exceed 300

mm

ACTM, Vol-II, Part-II Appendix –I,

Para-8.5 (Page-16) and drg.


iii. Stagger curve

(4-span)

Contact wire Only one of the contact wire is

in- running mid span stagger

of the in running contact wire

Not exceed as per

RDSO drg no.

ETI/OHE/G/00202


Para-8.5(Page-16) and drg.


iv. Stagger

distance

Contact wire

runs parallel

Two contact wire run parallel

to each other between the

intermediate support

200 mm from each

other

ACTM, Vol-II, Part-II Appendix–I,

Para-8.5 (Page-16)

v. Overlapping Contact wire Overlapping zone 2.0 m to 9.0 m

3. Stagger at Insulated overlap

i. Stagger distance Contact wire

runs parallel

Intermediate masts the two

contact wire run parallel from

each other

Minimum

clearance 500 mm


Para-8.6 (Page-16) and RDSO drg.

no.ETI/OHE/G/02131 sheet-1

ii. Parallel path Contact wire Overlapping zone for smooth

change over by the pantograph

Not less than 2.0

m to 9.0 m

maximum





24. SPAN


Observation Action

1. Span

i. Span Span length Minimum 27 m Treatise Vol. II, 3.3.2

Page -7 ii. Span Span length Maximum 72 m

iii. Span Maximum difference of

span

Maximum difference between two

consecutive spans in main line.

18 m ACTM, Vol-II, Part-II, 5.5. (i)

(Page -8)

iv. Span Span of cross type

OHE, turn outs

Maximum span length of anchor span of

cross type OHE at turnouts.

54 m ACTM, Vol-II, Part-II, 5.5. (vi)

(Page -9)

v. Span Span length at level

crossings

Maximum span length at level crossings

where earth wire is provided.

58.5 m ACTM, Vol-II, Part-II , 5.5.

(vii) (Page -9)

vi. Span Tramway OHE

Regulated

Maximum span length tramway type

Regulated OHE

63 m ACTM, Vol-II, Part-II, 24.1.2

(Page -38). RDSO drg. no.

ETI/OHE/G/04203

vii. Span Tramway OHE Un-

regulated

Maximum span length tramway type Un-

regulated OHE

30 m ACTM, Vol-II, Part-II, 24.2.1

(Page -38)

viii. Span Tramway OHE Un-

regulated in station area

Conventional OHE with contact catenary

wire, the maximum span may be increased

31.5 m

ix. Span Mast both side of track Mast located on both side of a track. It

shall be staggered

4.5 m ACTM, Vol-II, Part-II, 18.4 (Page

-26)

x. Span Difficult locations Spans in rocky cuttings, girder bridges,

location of mast on bridge piles and within

station area

No

standard

span

ACTM, Vol-II, Part-II , 5.5.(v)

(Page -9)



25. TRACK CENTRE


Observation Action

1. Spacing of track

i. Track

centre

Minimum distance of

center to center of track on

Main line.(BG)

Existing work 4265 mm Schedule of Dimension (SOD) Schedule-

I, Chapter-I, para - 1 (Page-4) ii. New works/Addition to

existing work

5300 mm

iii. Minimum radius of curve Curve 75 mm

(10 degree)

Schedule of Dimension (SOD) Schedule-

I, Chapter-I, para - 2 (Page-5)

2. Building and Structure

i. Horizontal

distance

Min. horizontal distance

from centre of track to any

structure except at a

platform

Existing work 2135 mm Schedule of Dimension (SOD)

Schedule-I, Chapter-I, para - 8 (Page-5) ii. New works/alterations

to existing work

2360 mm

iii. For Dedicated freight

corridor (DFCIL)

2825 mm RDSO‟s letter No.- CT/ DG/DFC dated

21/26-11-07 (File No.- EL/94/6/ Freight

Corridor) (Page-113)

3. Station Yard

i. Track

Centre

Minimum distance centre

to centre tracks


Schedule-I, Chapter-II, 1(i) (Page-10) ii. New works/ Alterations

to existing works

5300 mm

4. Workshops and running sheds

i. Track

Centre


to centre tracks


Schedule-I, Chapter-III, para - 2

(Page-17)

ii. New works/ Alterations to

existing works

In Workshop 4570 mm

In running sheds 5260 mm




Observation Action

Note : Where there is a structure between tracks, the distance of center to center

of tracks is to be increased by the amount of the width of the structure like OHE

post etc.

5. Tunnels, Through and semi through girder bridges

i. Track

Centre


to centre tracks


Schedule-I, Chapter-I, para - 13 (Page-

8) ii. New works/ Alterations

to existing works

4725 mm



26. TOWER WAGONS


Observation Action

1. Tower Wagon (4-Wheeler Mark-II)

i. Tower

Wagon

4-Wheeler

Mark-II

Salient Feature

Make- Kanchrapara ACTM, Vol-II, Part-I Para-20318 (Page-72)

Engine Capacity 83 HP (Simpson make)

Axle load 6.8 tonne

Pay load 3 tonne

Transmission Gear Box system

Brake system Vacuum

Speed potential 40 Kmph RDSO‟s letter No.- MC/TW dated 21-10-99

(File No.- EL/92/25/0/ Policy, Vol-I, Page-96)

Number of

Engine

Single

Make of Engine P-6, Perkinson /TATA

Engine Position Under Slung

2. Tower Wagon (4-Wheeler Mark-III )

i. Tower

Wagon

4-Wheeler

Mark-III

( DHTW)

Salient

Feature

Make Jamalpur / Ventra ACTM, Vol-II, Part-I Para-20318 (Page-72)

Diesel Engine 185 HP

Type Diesel Hydraulic CAMTECH Training module for 4W-tower

wagon driver issued on February 2003 Transmission Hydraulic Transmission

Brake system Compressed air brake

Pay Load 10 Tonnes RDSO Specification

no.TI/SPC/OHEWDHTW/0070 /dated.

30.06.2007, chapter-2 page 9 &10 Axle load 16 Tonnes

Speed potential 75 Kmph

Tare Weight 22 Tonne

Number of

Engine

Single -

ii. Make of Engine KCL

iii. Engine Position Under Slung




Observation Action

3. Tower Wagon (4-Wheeler Mark-IV )

i. Tower

Wagon

4-Wheeler

Mark-IV

(DHTW)

Salient

Feature

Make Jamalpur Ventra Locomotive‟s Operation and

Maintenance manual for 4-Wheeler

OHE Tower Car Mark-IV.

Diesel Engine 205-215 HP

Brake system Compressed air brake

Transmission Hydraulic

Axle load 16 tonnes

Engine Position Under Slung

Make of Engine Cummins (CIL)

Number of Engine Single

Pay Load 10 Tonnes RDSO‟s specification No.-

TI/SPC/OHE/4-WDHTW/ 0070 , June‟

2007 (Page-10)

Speed potential

75 Kmph

RDSO‟s Specification no.TI/SPC/

OHE/4-WDHTW/0070 /dated.

30.06.2007, chapter-2 page 9

4. Tower Wagon (8-Wheeler DHTC )

i. Tower

Wagon

8-Wheeler

DHTC

Salient Feature

Make- ICF/SAN Engg./BEML

CAMTECH/2003/E/8-TW/1.0 -March

2003

ii. Brake system Compressed air brake

iii. Diesel Engine Single 530 HP, Twin 285 HP

iv. Number of Engine Single, Double.

v. Make of Engine KCL, Cummins

vi. Engine Position Under Slung, On Board

vii. Alternator 24V/30A- Lucas TVS make,

110/4.5 KW, KEL make




Observation Action

viii. Tower

Wagon

8-Wheeler

DHTC

Salient

Feature

Generator set 230 V single Phase 2.1/2.4 KVA

of Shriram Honda

ix. Axle load 16 t RDSO‟s Specification

no.TI/SPC/OHE/8-W DHTW/0070 Rev.-

1 /dated. 14.07.2010, chapter-2 page 9 &

10

x. Maximum speed Maximum speed: 110 Km/h

xi. Pay load Approx.12 t

xii. Transmission Voith's hydraulic

ACTM, Vol-II, Part-I , Para-20318

(Page-73)

5. Tower Wagon (8-Wheeler DETC )

i. Tower

Wagon

8-Wheeler

DETC

Salient

Feature

Make- Integral Coach Factory (ICF) ICF Manual for DETC

ii. Input to traction 620 HP Maintenance Schedule for

Diesel Electric type 8 Wheeler

Tower Wagon

(CAMTECH/2009/E/DETC

/1.0, December 2009

iii. Axle load 18 Ton (Max.)

iv. Gear ratio 20/91

v. Power transmission AC/DC

vi. Operating speed 100 kmph (max.)

vii. Hauling capacity 150 Ton (approx.)

viii. Brake systems Twin pipe air brake suitable to haul

air/vacuum.

ix. Clearance above rail

level

Minimum of 102 mm with coaches fully

loaded &wheels in fully worn condition.

x. Wheel diameter 952mm (new) 877mm (fully worn)

914.5mm (half worn)

xi. Wheel arrangement of

power

BO – BO (All axles independently

powered)

xii. Minimum radius of

curve

175 mm




Observation Action

6. Maintenance Schedule of 8- wheeler tower car for DETC and DHTC

i. Maintenance

Schedule

(TW)

DETC and

DHTC

With Engine stop

With Engine stop

Monthly RDSO Maintenance Instruction no.

TI/MI/0043 Rev 0 dated 01.08.2008 Three

Monthly

Half Yearly

Yearly

ii. POH of Traction Motor

iii. Maintenance of Rectifier

iv. Maintenance of Engine

v. Maintenance of Transmission

vi. Maintenance of Axel Drive

vii. Maintenance of torsion rod assembly

viii. Maintenance of Lifting and Swiveling Platform

ix. Overhauling during IOH/POH

7. Periodicity of major schedules of tower wagons

i. 4-W Tower

wagon

Major

schedule

1st major schedule equivalent to AOH 12 month

Rly. Bd.'s letter No.- 84/RE/158/1/Pt.-

dated - 31-01-06 (File No.- EL/92/25

/0/Policy, Vol-I, Page-181 ii. 2nd (intermediate O/H) of subsystem 24 month

iii. 3rd major schedule 36 month

iv POH 48 month

i. 8- W Tower

wagon

Major

schedule

1st major schedule equivalent to AOH 18 month

ii. 2nd (intermediate O/H) of subsystem 36 month

iii. 3rd major schedule 54 month

iv. POH 72 month




Observation Action

8. Codal Life of 8-W and 4 –W Tower wagon & all types Advance Correction Slip No. 73 Rly.

Bd.'s letter No.- 2002/AC-

II/2/10/Vol.II.- dated – 22.08.2012

(RBA/No. 28/2012)

i. Tower wagon Codal life 8-Weeler,4-Weeler

and all types

40 years

9. Schedule of Standard Examination of 8- wheeler tower car for DETC and DHTC

i. Maintenance

Schedule

(C&W)

DETC and

DHTC

Fill water in lavatory

in over head tank.

Drain valves of brake

system etc

Daily RDSO Maintenance Instruction no.

TI/MI/0043 Rev 0 dated 01.08.2008

Body, Under frame,

bogies, brake rigging

etc.

Weekly

Monthly

Quarterly

Six monthly

Yearly

Eighteen months

Thirty six months

Fifty four months

Periodical overhaul (POH)

seventy two months

10. Tower Wagon offering time during breakdown

i. Tower

Wagon

Breakdown Day time 30 minutes after fault

localization

JPO of COM/ER & CEE/ER vide No.-

EL/92/25/0/ Policy dtd - 05-06-2002

(File No.- EL/92/ 25/0/Policy, Vol-I,

Page-81) Night time 45 minutes after

blowing siren




Observation Action

11. Norms / Yardstick for provision of Tower Wagon

i. Tower

wagon

Provision/Norms

/ Yardstick of

Tower wagon

Divisional HQ and ARMV

location (at the nearest OHE

depot to this two locations

8- Wheeler Tower Wagon

Rly. Bd.' letter No.- 84/RE

/158/1/Pt.-dated - 19-01-06

Ref:

Board‟s letter no.

97/Elect.(G)/ 148/2 dated

20.05.1998

ii. All other depots 4 Wheeler

iii. Types of Tower

wagon

8- W Tower Wagon Twin Engine under slung

version with hydraulic drive

iv. 4- W Tower Wagon Diesel hydraulic with speed

protection of 75-90 Kmph

12. Maintenance of Tower wagon

i. Tower

wagon

Maintenance of

Tower wagon

Engine and drives Through OEMs Rly. Bd.' letter No.- 84/RE

/158/1/Pt.-dated - 19-01-06

Ref: Board‟s letter no.

97/Elect.(G)/ 148/2 dated

20.05.1998

ii. Vehicle portion Workshops nominated by

Zonal Rlys.

iii. Rehabitation/ maintenance of

other sub assemblies

OEMs / Sources considered /

approved by CEE

13. Scheduled time for POH

i. Tower

wagon

8-Wheeler

Tower wagon

POH schedule time 4 month Minutes of meeting on 15-

05.06 vide SME/Crane/HQ

letter No.- MS/547/ Pt-II

dated-05/06/06 (File No.-

EL/92/ 25/4-Wh, Page-71)

ii. Tower

wagon

4-Wheeler

Tower wagon

POH schedule time 4-

Wheeler Tower wagon mark-

III & IV

3 month 15 days

iii. POH schedule time 4-Wheeler

Tower wagon mark- II

1 month 15 days

14. Future Procurement of Tower Wagon

i. Tower

Wagon

Procurement Design & procurement of

tower wagon

Only 8- Wheeler rolling stock

on Indian Railways

Railway Board‟s letter No.

2012/CEDO/SD/RS/04 dated

17.10.2012



27. OHE & PSI SPARE ITEM


Observation Action

Spare Item

i. Spare

Spare item OHE Spare 3% 26 th MSG item 26.7 & 26.8

(File No.- 94/4/RDSO/ MSG Meeting/Vol-II)

Spare item PSI equipment 5%



28. NEUTRAL SECTION


Observation Action

Neutral sections are provided to isolate different phases of power supply in adjoining overhead equipment fed by adjacent

substations, which are normally connected, to different phases of supply. The neutral sections maintain mechanical but not

electrical continuity of OHE

1. Overlap type

i. Neutral

section

Conventional

overlap type can

be used

Except in suburban and

heavy graded section

- RDSO's Drg.

no.ETI/OHE/G/02161, Sheet-

1Mod-C

ii. Neutral length Neutral length of

overlap type neutral

section

41.0 m

2. Short neutral section of section insulator assembly type

i. Short neutral

section

where adoption of

overlap type

neutral section is

not feasible

In heavily graded

section and suburban

section.

Short neutral section of 5

m length may be adopted

i. RDSO's Drg.

no.ETI/OHE/G/02161, Sheet-2

ii. ACTM Volume II (Part- II)

Appendix-I, Para16.0

ii. Treatise Part-4. Chapter- 5 page

249

ii. Speed Speed restricted to 120

km/h

if the runners are in

trailing direction,

otherwise to 80 km/h.

iii. Tension length Half tension length Not exceeding 500 m

iv. Adoption of short

neutral section

Avoided in main

running line

Due to heavy weight,

restricted speed and

frequent maintenance

3. Short neutral section assembly (PTFE) type

a. Short neutral

section

speed Bi- directional 200 Km/hr i. ACTM Volume II (Part- I)

Para 20312 page 67

ii. Treatise Part-4. Chapter-

5,para-4.5.4, page 249.




Observation Action

b. Short neutral

section

Installation location

from cantilever

supports

i. Where locomotives of any

type may become stationary

Short neutral section

must not be

installed.

i. ACTM Volume II

(Part- I) Para 20312

page 67 of ns drawing. ii. At a midpoint anchor

location of the OHE

iii. On a streep gradient where

the interruption of power

will have an adverse effect

on the smooth passage of

the locomotive

c. Short neutral

section


from cantilever

supports

i. Neutral section shall be

located away from stop

signal

Short neutral section

shall be installed

ACTM Volume II (Part- II)

Appendix-I, Para16.4, page-

23

ii. Away from level crossing

and on tangent track and on

level to the possible extent.

d. Short neutral

section


from cantilever

supports

After the stop signal on tangent

track

At least 400 m ACTM Volume II (Part- II)

Appendix-I, Para16.4, page-

23

before the stop signal on tangent

track

At least 200 m

4. Arthur Flury AG Neutral Section

i. Short neutral

section

speed Bi- directional 200 Km/hr As per Arthur Flury AG

Neutral section manual

ii. Short neutral

section

Diameter Diameter of new rod in good

condition.

24 mm




Observation Action

iii. Measurement of

diameter If the diameter is

reduced by 2 mm at

any point.

It should be turned by 72 deg

(2 marks). Insulating rods with

reference to direction of

traffic.

iv. All skids Profile at bottom

portion of all the skids

and record thickness

If thickness of bulb reduced to

2 mm or less the skids should

be replaced immediately

v. Earthing of middle

section insulator

i.Earth resistance

ii.Earth wire diameter

i. Should be less than 10

Ohm

ii. Shall be 12.0 mm to 13.0

mm

vi. Thickness of skids Check the profile at

bottom portion of all

the skids

If thickness of bulb reduced to

2 mm or less the skids should

be replaced



29. OHE IMPEDANCE


Observation Action

1. OHE Impedance

i. OHE

Impedance

OHE Impedance

value

Single track OHE without RC 0.41 ohm/Km ACTM, Vol-II, Part-II , Appendix

-V, 1

(Page-99) ii. Double track OHE without RC 0.24 ohm/Km

iii. Single track OHE with RC 0.70 ohm/Km

iv. Double track OHE with RC 0.43 ohm/Km



30. INSULATOR


Observation Action

1. Composite Insulator

i. Composite

Insulator

Use of 25 kV

insulators on

AC traction

system based

on Equivalent

Salt Deposit

Density

(ESDD) test

i. Use of only composite

insulators of 1050 mm CD

for stone pelting menace

areas with the approval of

CEE

ii. Use of porcelain insulators

of 1050 mm CD for other

areas

ESDD ≤ 0.3

i. Policy circular No. RB/Elect/ TrD

dated 04.2012

ii. Railway Board letter No.

2002/Elect.(G)/161/21 Vol.II

dated 04.07.2012

iii. Ref: a. DSO's letter no.

TI/OHE/INSCOM/SL/11/1 dated

04.01.2011

b. RDSO's letter No.

TI/OHE/INS/GEN/12 dated

07.06.2012.

c. This Office of even

Number dated 13.04.2010

ii. Use of composite insulators

of 1600 mm CD in all the

areas with the

approval of CEE

ESDD > 0.3

iii. Severity of

pollution

Method adopted is Brush

Wash of a polluted insulator

Equivalent Salt Deposit

Density (ESDD) as per

IS: 13134

RDSO Maintenance Instruction no.

TI/MI/040 (Rev.0) dated 05.04.2005

2. Porcelain Insulator

i. Porcelain

Insulator

Failure of

insulator

Check failure is due to

external reasons

i. Monkey/ Vulture

electrocution

ii. Pantograph

entanglement

iii. Tree cutting

iv. Short circuit by

snake, stay wire etc.

v. Stone throwing by

miscreant

RDSO Instruction no. TI/IN/0007

(Rev.0) dated 07.09.2001




Observation Action

vi. Brake block hitting the mast

vii. Bad weather

viii. Potential difference at FP

ix. Pollutant deposition

x. Contact/catenary wire or any

other external reason

3. Load to be applied for testing of 25 kV Porcelain Insulator

Type of

insulator

Specified

SML in kgf

Routine Tensile

Load (RTL) @

55% of specified

value in kgf

Dead Load Y to be provided for

double rail in kg

i. RDSO Maintenance Instruction

no. TI/MI/0042 (12/2008) Rev.0

dated 12.12.2008

ii. ETI/OHE/15(9/91) Insulator

manufactured prior to 2000 120 kg/m 104 kg/m

i. Stay arm and

Bracket

5400 2970 66 118

ii. 9-ton 9900 5445 447 499

i. Stay arm and

Bracket

7000 3850 201 254 i. RDSO Maintenance Instruction

no. TI/MI/0042 (12/2008) Rev.0

dated 12.12.2008

ii. ETI/OHE/15(9/91) with a & c

slip no.1to 6

ii. 9-ton 9900 5445 447 499

i. Stay arm and

Bracket


no. TI/MI/0042 (12/2008) Rev.0

dated 12.12.2008

ii. TI/SPC/OHE/INS/0070 ii. 9-ton 11000 6050 540 592




Observation Action

4. Load to be applied for testing of 25 kV Composite Insulator

Type of insulator Specified

SML in kgf

Routine Tensile Load

(RTL) @ 55% of

specified value in kgf

Dead Load Y to be provided

for double rail in kg

i. RDSO Maintenance Instruction

no. TI/MI/0042 (12/2008) Rev.0

dated 12.12.2008

ii. TI/SPC/OHE/INSCOM/0090 or

TI/SPC/OHE/INSCOM/0091

120 kg/m 104 kg/m

i. Stay arm and

Bracket

5400 3780 191 243

ii. 9-ton 9900 6930 675 727

iii. Stay arm and

Bracket


no. TI/MI/0042 (12/2008) Rev.0

dated 12.12.2008

ii. TI/SPC/OHE/INSCOM/1070 iv. 9-ton 11000 7700 794 846

5. Following batches have been declared as FAILURE PRONE batches

i. Type of insulator Make Batches RDSO Instruction no. TI/IN/0012

Rev.0 dated 13.12.2005

ii. Stay arm insulator MPL 1966.1968 &1969 ( for undivided S.E Rly only)

iii. Bracket insulator 1960, 1968 &1975 ( for undivided S.E Rly only)

iv. Bracket insulator GDR 1966

v. 9- tone insulator All batches

vi 9- tone insulator JSI 5/96, 12/96, 2/97,

vii. Bracket insulator 2/89

viii. Bracket insulator WSI 9/88

ix. Stay arm insulator 9/88

x. 9- tone insulator 1/89




Observation Action

xi. 9- tone insulator MIL 10/87, 12/87, 11/2000

xii. 9- tone insulator W.G 1982

xiii. Bracket insulator BHEL 6/82

6. Suspected to be Failure Prone Batches

i. 9- tone insulator NGK 1980 RDSO Instruction no. TI/IN/0012

Rev.0 dated 13.12.2005 ii. 9- tone insulator JSI 2/96

iii. Composite

insulator

How to

handle 25 kV

composite

insulator

i. Receiving, unpacking & storage

ii. Transport to construction site

iii. On site handling

iv. Installation by TrD staff/vendors

v. Conductor stringing & cantilever assembly

vi. Final inspection before energisation

vii. Care during maintenance

RDSO Instruction no. TI/IN/0013

Rev.0 dated 19.12.2005

For polluted zone Rly. Bd.'s letter No.-2005/RE/220/2

dated - 29-10-07

(File No.- EL/94/4/ RDSO/ Vol-III.

(Page- 293) & 2002/RE/161/21 dated -

29-08-07

(File No.- EL/94/4/RDSO/ Vol-III,

(Page-285)

iv Could be used in Non-polluted zone

v. Insulator Creepage

distance

Standard 850 mm RDSO‟s specification No-

TI/SPC/OHE/INS/0070 vi. Polluted 1050 mm

vii. Insulator Replacement

of insulators

having

broken shed

Maximum number of

broken sheds of insulator

allowed

2 sheds ACTM, Vol-II, Part-I, Para-20326.2

(a) (ix)

(Page-79)

viii. Maximum number of

broken end sheds of

insulator allowed in line

1 sheds CEE/ER's letter No.-

EL/94/4/ASN/CKS (133) dated 12-

06-07 (Page-94)



31. TRACK


Observation Action

i. Gauge Standard Track gauge 1676 mm Gauge (BG) Indian Railways Schedule of

Dimensions revised 2004

ii. Track Maximum

tolerance

Provision for future track

raising

275 mm ACTM Vol.-II, Part-II,

Appendix-I, Para – 7.5 (Page-15)



32. TEMPORARY SPEED RESTRICTION


Observation Action

Temporary speed restriction

The instructions regarding sped restriction, in electrified sections are being notified under GR-17.09. The temporary speed

restrictions shall be imposed by Electrical (TRD) Deptt, as per GR-4.09 wherein a caution order shall be handed over to driver

at the stopping station immediately short of the place where such precautions are necessary. While imposing temporary speed

restrictions, the following guidelines shall generally be followed:

i. Speed

restriction

Temporary

speed

restriction

Temporary mast is provided.

For new mast foundation to

be casted. Curing time 5/6

days. OHE shifting on new

mast.

Speed restriction 15-40 kmph

depending upon the site

condition total time in this

process is about 10 days and

block availability.

ACTM Advance & correction

slip no.- 12 vide Rly.Bd.'s letter

No.- 2004/RE/ 161/1/ Pt-III

(ACTM) dated 03/05/2005

ii. Bent mast, if the same is

straightened using tirfor.



condition time duration 3-4

days and block availability

iii. OHE damages due to panto

entanglement, providing

temporary dropper etc, (not

affecting OHE mast)



condition (Time duration 4

days). and block availability

iv. Speed potential of regulated

tramway type OHE (old

lines)

90 kmph

RDSO's letter No.- ETI/OHE

/GA dated-10/19-06-97 (File

No.-EL/94/0/ Policy/ Vol-II,

Page-225)



33. PORTALS


Observation Action

Portals: Where adequate track centre are not available and track cannot be slewed, portal are used.

i. Portal „N‟ Type

portal

It is used to cover multiple

OHE (8 cantilevers) and return

conductors for Up & Dn lines.

It is capable of carrying

anchors on uprights.

i. Maximum 4 tracks

ii. Clear span 10.0 m to 20.4 m

iii. Maximum bending moment

8000 kgm at base

iv. Cross section 450 mm x 450

mm

i. ACTM, Vol-II, Part-II,

Appendix -I, Para- 6.3.1,

(Page-10)

RDSO's Drawing No.-

ETI/C/0064

ii. Treatise Volume II, Part

III., Annexure 3.5.1 page

75

ii. „O‟ Type

portal


OHE (12 cantilevers) and

return conductors for Up & Dn

lines. It is capable of carrying


i. Maximum 6 tracks

ii. Clear span 20.4 m to 30.5 m


17000 kgm at base


mm

iii. „BFB‟

Type portal

It is used where track centre

are very minimum and un

avoidable, cover multiple OHE

(6 cantilevers) and return




i. Maximum 5 tracks

ii. Maximum clear span 24.6 m


8000 kgm at base


mm,10.66 m

iv. „R‟ Type

portal


OHE and two return

conductors on uprights. It is

capable of carrying anchors on

uprights.

i. Maximum 8 tracks

ii. Clear span 36 m


20,000 kgm at base Cross

section 600 mm x 600 mm




Observation Action

v. „G‟ Type

portal

It is used where track centre

are very minimum and un-

avoidable, cover multiple OHE

(12 cantilevers) and return




i. Maximum 6 tracks

ii. Maximum clear span 30.5 m


17000 kgm at base


mm,10.8 m

vi. Head span In yards where unregulated

OHE is used head span may be

used.

It is not used normally‟

It can cover more than 6 tracks ACTM, Vol-II, Part-II,

Appendix -I, Para- 6.4, (Page-

11). RDSO Drg .no.

ETI/OHE/G/03201



34. TRIMMING/CUTTING OF TREES


Observation Action

Trimming/ cutting of trees

i. Trimming/

cutting of

trees

Cutting of

trees

Whole sale cutting of tree

i.e. cutting of trunks in the

electrified territories

By Engineering

department in presence

of authorized TrD staff i. Advance correction(AC) slip No. 79 dated

10.10.2002 of Indian Railways Permanent Way

Manual 1986- Edition

ii. Railway Board Letter No. 2008/Elect (G)/161

/8Pt. dated 05.09.2012.

Policy Circular No.RB/Elect/TrD-06-2012

ii. Trimming

of trees

Day to day trimming of

the tree branches,

wherever required

By the authorized TrD

staff and supervisor

iii. Clearance Maintain

clearance

Maintain clearance

between OHE to

tree/branches

4 m



35. INSPECTION

S.No. Item Parameters Details Authority

Observation Action

1. Inspections

i. Inspection

Foot Patrol OHE / PSI depot

Incharge / supervisors

Total Jurisdiction once in

2 months

HQ letter No.- EL/94/2/

Reliability/CKS dated-13/7/07

(File No.- EL/94/2/ Reliability/

Vol-II (Page-16)

ii. Foot Plate OHE / PSI depot

Incharge / Supervisors

Total Jurisdiction once a

month

iii. Tower Wagon AEE/TRD Total Jurisdiction once a

month

iv. Tower Wagon Sr.DEE/TRD Total Jurisdiction once in 6

months

v. Tower Wagon Sr.DEE/TRD-SP/FP/TSS Total Jurisdiction once in

12 months

2. Schedule of Monthly Inspection

i. Inspection Traction Sub Station Sr.DEE/TrD 01 ACTM Volume II (Part-I)

Annexure 2.01

(Parac20202,20223) DEE/TrD 01

AEE/TrD 02

Depot In-charge/SSE 04

ii. Inspection Switching Station Sr.DEE/TrD 01

DEE/TrD 02

AEE/TrD 03

Depo In-charge/SSE 04



S.No. Item Parameters Details Authority

Observation Action

iii. Inspection PSI Depots Sr.DEE/TrD 01 ACTM Volume II (Part-I)

Annexure 2.01

(Parac20202,20223) DEE/TrD 02

AEE/TrD 04

iv. Inspection Grid sub stations Sr.DEE/TrD 2 in a years

DEE/TrD 01

AEE/TrD 02

Depot In-charge/SSE 01

v. Inspection Office Inspection Sr.DEE/TrD 01

DEE/TrD 01

AEE/TrD 01



36. WORKING OF LADDER TROLLEY


Observation Action

Ladder Trolley

Ladder

Trolley

Guideline of

ladder trolley

working of

OHE work

i. Working in

traffic block

i. With open line maintenance block

(shadow block)

ii. Observe all safety requirements

Railway Board letter no. 200/RE/161/1-

Pt.II dated 18.05.2006

Ref:i. Board‟s letter no. 2000/RE/161/1

dt-09.11.2005

ii. GM/CORE‟s DO letter no.

EL/CORE/CRS dt 04.04.2006

Use of ladder

trolley

It cannot be used to carry material

Ladder trolley

governed in

accordance

GRs- 15.18.15.19.15.20,15.22,15.26 and

15.27(2)

Movement of

trolley

i. Ladder trolleys are non moving

trolleys from station to station

ii. Wheel aid for movement by a few

meters( 100 to 200 meters)

Para 9.4 CRS report is applicable for lorries only



37. CORROSION RESISTANCE PAINT SYSTEM FOR OUTDOOR STRUCTURE OF TRACTION DISTRIBUTION


Observation Action

Corrosion Resistant Paint System for Outdoor Structure of Traction Distribution

Following guidelines are issued for use/ application of Corrosion Resistant Paint System as per RDSO Specification

No.TI/SPC/CIV/POR/0080(08/2008

i. Anti

corrosion

paint

OHE structure Anti corrosion paint

applied on the OHE

structure primarily up to

1.5 m height from muff

Avoid the

corrosion at the

bottom of

structure

i. RDSO‟s letter no. TI/CIV/09 dated –

21.05.2012

ii. Rly Bd letter no. 2003/RE/161/1 Vol.2.

dated-18.09.2008

iii. RDSO‟s letter no. TI/CIV/GCP/08

dated-22.03.2012

iv. RDSO specification no.TI/SPC/CIV

/POR/0080 (08/2008)

ii. Rusted structure The anti corrosion paint

shall be used on rusted

structures if it is inevitable

As per para 1.1

of specification

iii. Rusted structure

of outdoor

Paint shall be applied over

rusted surface of outdoor

galvanized steel structures

Exposed to atmospheric

condition for several years

and have started rusting

As per para 2.1

of specification

iv. Rusted structure Masts, structures, and other

equipments of OHE and

traction power supply

exposed to atmosphere

where corrosion/rusting is

surfacing

As per para „D‟

of specification




Observation Action

v. Rusted

Cantilever

Anti corrosion paint shall

be applied over the rusted

cantilever assembly

judiciously over the rusted

parts

As per of

specification

i. RDSO‟s letter no. TI/CIV/09 dated –

21.05.2012

ii. Rly Bd letter no. 2003/RE/161/1 Vol.2.

dated-18.09.2008

iii. RDSO‟s letter no. TI/CIV/GCP/08

dated-22.03.2012

iv. RDSO specification no.TI/SPC/CIV/

POR/0080 (08/2008)

vi. Paint system Paint system shall be

carefully applied on the

corroded surface as per the

laid down safety norms of

Original Equipment

Manufacturer (OEM)

As per para „9‟

of specification

Note:

i. The anti corrosion paint shall be used on rusted structures if it is inevitable.

ii. Paint shall be applied over rusted surface of outdoor galvanized steel structures exposed to atmospheric

condition for several years and have started rusting.

iii. Masts, Structures, and other equipments of OHE and traction power supply exposed to atmosphere where

corrosion/rusting is surfacing

iv. Anti corrosion paint shall be applied over the rusted cantilever assembly judiciously over the rusted parts.

v. Paint system shall be carefully applied on the corroded surface as per the laid down safety norms of Original

Equipment Manufacturer.



38. JOINT PROCEDURE ORDER (S&T and Electrical cable)


Observation Action

Joint Procedure Order for protecting S&T & Electrical Cables

i. Joint

Procedure

Joint procedure order for undertaking

digging work in the vicinity of

underground signaling, electrical and

telecommunication cables.

Between electrical, signaling,

engineering and

telecommunication

i. Rly Bd letter no. D.O.No.

2011/sig/ 8F/1/Pt dated-

23.04.2012

ii. Rilway Board's JPO No.

2004/Sig/G//7 dated

16/17.12.2004

iii. Guideline on signaling cable

laying issued by RDSO in Oct

2011



39. OHE RELIABILITY 12 POINTS


Observation Action

1. Measures for improving OHE reliability 12 points action plan

Work Yearly

i. Railway Bd letter No.

2008/Elect(G)/161/8/Punct

dated 07.10.2011

ii. AM/L's DO letter No.

2008/Elect(G)/161/8/ Punct.

dtd. 08.09.10

iii. Board's letter No 2008/

Elect(G)/161/8/Punct dtd.

28.09.10

i. OHE

Reliability

Turn outs/cross over OHE for its adjustment/alignments During

maintenance

schedule ii. Live line checking bt Tower wagon

iii. Free movement of cantilever

iv. Status of overhauls of ATD and its free movement

v. Checking of PG clamps, splices by thermo vision camera

vi. Provision of missing structure bonds/Rail bonds

vii. Cleaning of insulator at finalized interval

viii. Checking and calibration of protective relays at specified

interval

ix. Attention to critical implantation (< 2.36 m + curve

allowance) mast on maim line

x. Replacement of rusted cantilever assembly

xi. To check the healthiness of lightning arrestor in lightning

prone area

xii. Replacement of silver brazing joints in contact wire

xii. Provision of screen to 1.83 m height on all FOBs to cover

gaps wherever existing between two lines




Observation Action

2. Progress of Nerta Car run:

S.no. Section Running

date

Nos. of

bad

location

Total Nos.

location

attended

% of

location

attended

Target date

for

remaining

location

Action

plan



dated 07.10.2011



dtd. 08.09.10



28.09.10

3. Population of predictive maintenance Tools:

Railway Division Oliver-G Thermo vision

camera

GPS mapping for

Netra Car



dated 07.10.2011



dtd. 08.09.10



28.09.10



40. RETO- REFLECTING NUMBER PLATE


Observation Action

Provision of retro-reflective number plate on OHE mast

i. Retro-reflective

number plate

Guideline of

provision of recto-

reflective number

One no. of retro-reflective OHE number plates

should be provided in each kilometer at the

beginning of kilometer.

i. 2001/Electrical (G)/170/1 Pt

dated- 07.05.2012

ii. RDSO's letter No

TI/OHE/STR/NOP/04 dated

16/20.04.04 & 23.11.2011

ii. Retro-reflective number plates should be provided

at critical locations like before the stop signals and

before the permanent speed restrictions

iii. All other warning boards like DJ open, DJ close,

500m board, 250 m board, coasting, dangers etc.

which are used in OHE (not PSI) should be retro-

reflective type as it will improve the visibility of

running staff.

iv. Number plate background i.e. traffic blue colour

will be non reflective type with no borders

v. Only the letters & figures will be retro-reflective

type in deep yellow colour.

vi. Sigma strips wherever provided should be on the

lower post of mast for proper retro- reflection

vii. Sigma strips may be provided on fog prone area

only.




Observation Action

viii. The retro-reflective strip in sigma shape for

identification of all signals shall be provided two

masts prior to all signal locations for easy

identification during foggy weather. The detailed

design for provision of sigma strip shall be

finalized by RDSO, It shall be advised to running

staff that this is only an aide to the running staff

and its non- availability/ damaged number plate or

poor visibility will not be considered the reason for

any signal overshooting.



41. SLEWING OR ALTERATIONS TO TRACK


Observation Action

P.Way Maintenance Manual

i. Slewing of

alteration of track

As per Para 283(g)

86 (h) of Chapter II

of P.Way

Maintenance Manual

Alteration of track

involving adjustment of

contact wire and alteration

to track bonding

Strictly

implementation

No 2005 Elect (G) 161/8

Punct. Pt.II Dated 17.08.20 12

Policy Circular No.RB/Elect.

/TRD 05-2012

Alteration of Tracks

i. Slewing of

alteration of track

Involving adjustment

of contact wire

(outside the agreed

maintenance limits)

Engg. department

sufficient notice should be

given to concerned traction

department

Traction department shall

arrange to adjust the OHE i. No 200 Elect (G) 161/8

Punct. Pt.II Dated 17.08.20

12

ii. Policy Circular

No.RB/Elect./TRD 05-

2012iii

iii. ACTM Vol II, Part-I, Para

20306

ii. Permission to work Due notice shall be given

to TrD dept. by Engg. dept

before commence the work

TrD department may be

adjusted to confirm to the

new conditions

iii. Joint checking of rail

level and setting

distance

Yearly maintenance of

OHE

Any variations above 30

mm in setting distance and

20 mm in rail level should

be advised to the PWI for

correction

Alterations to track bonding

i. Bonding Removal and fixing

of bind

By Engineering

department

This activities shall be

reported to ADEE/TD in

charge without delay

No 200 Elect (G) 161/8 Punct.

Pt.II Dated 17.08.20 12 Policy

Circular No.RB/Elect./TRD

05-2012



42. SAFETY OF RAILWAY STAFF IN 25kV AC, 1500 v DC


Observation Action

Precautions to be followed by Railways

i. Safety of

Railway

staff

Working of

Railway staff in

electrified

section

Electrified section, no Rly staff should climb

on top of any Rly vehicle including

engineering machine, electric locomotive

,tower wagon, crane, or any other structure

including platform shelter roofs where 25 kV

wire crossing the shelter on the electrified

track.

OHE Power supply is completely

switched off and earthed

Railway Board

lettr No. 2009/Re/

161/4 FTS- 748

dated- 26.08.2014

ii. In emergency climbing of the top of any

vehicle due to any reason

i. PTW (Permit to Work) must

be taken.

ii. OHE dead and earthed

iii. In the presence of OHE

supervision

iv. Private number will have to

exchange both at the time of

availing the block and at the

time of cancelling the block

iii. Counsel of staff All senior supervisor have counseled their

staff

Senior supervisor maintain a

register in which acknowledgment

of all staff under their control

have been taken

iv. For new staff joins Counseled immediately &

acknowledgement taken




Observation Action

v. Caution Board Caution board and written instructions to be

provided

At Departmental vehicle/track

machine /platform shelters for the

same in Hindi/ English shown as

below

Railway Board

lettr No.

2009/Re/ 161/4

FTS- 748 dated-

26.08.2014 vi.



43. NEW PLAN HEAD (TRACTION DISTRIBUTION)


Observation Action

Creation of new plan head- TrD

i. New plan head TrD assets Traction Distribution (TrD)

Works including replacement of

over aged TrD assets.

Traction Distribution

Work PH-3700

i. Railway Board letter No.

2011/Elect(G)/148/3 dated-

04.05.2012

ii. RBA No. 8/2012. Rly Bd letter

No. 2011/ACII/3/1 dated

03.04.2012

ii. Excluding TrD Other electrical works Plan Head-3600



44. RUNNING OF TRAINS AT 150 Kmph SPEED


Observation Action

Technical requirements for running of trains at 150 Kmph speed

i. Technical

requirements

Drop bracket

assembly

As per Drg. No. ETI/OHE/P/2360 along with steady arm as per

Drg.no. ETI/OHE/P/2390 to give apush up of 110 mm

Railway Board latter No.

2001/Elect(G)/170/1Pt.

dated- 30.062009 ii. Cross type OHE Cross type OHE to be modified on priority

OHE tension Increase in tension is not required

iii. Contact wire gradient The contact wire gradient should be reduced from 3 mm per

meter to 1 mm per meter and difference in contact wire gradient

between two adjoining spans be reduced from 1.5 mm per meter

to 0.5 mm meter

iv. Pre sag Pre sag of contact wire should be reduce from 1.4 mm per meter

to 0.8 mm per meter

v. Condemning diameter The Condemning diameter of contact wire shall not be

channeled

vi. Dropper The flexible droppers for increasing current capacity are not

required as there is adequate provision of 'C' & 'G' jumper

vii. PTFE PTFE type short neutral section should be provided wherever

required

viii. Number plate Retro- reflective number plate should be provided

ix. Traction Sub station The Traction substation should not be augmented for running

only one train of high speed




Observation Action

x. Adjustment of OHE Railway must ensure that the adjustment of OHE shall have

same provision as mentioned in above in following condition as

these adjustment will save large scale adjustments required

later on to raise 150 kmph speed

xi. i. At the time of adjustment work of contact wire existing

main line OHE

ii. New construction work of OHE on main line



45. ISSUE OF COMPETENCY CERTIFICATE TO POINTSMEN


Observation Action

Issue of Competency Certificate To Pointsmen for opening isolator during emergency

i. Competency

certificate to

pointsmen

Opening of isolator

during emergency

Station Master/ Assistant Station Master/

Pointsmen should be issued with

competency certificate, after giving

practical training to enable them to operate

specific isolator under instructions of

Traction Power Controller (TPC)

ACTM para

20970-5 modified

Railway Board letter no.

2001/Electrical(G)/138/4 Pt.

dated- 10.01.2013

Advanced correction slip no. 24

dated-10.01.2013



46. ANTITHEFT ENERSISATION DURATION


Observation Action

Antitheft Energisation Duration

i. Anti- theft Duration Period of anti-theft energisation

Item No. of ACTM Vol.II,Pt.II,

Appendix VII -1.2

Decided with approval of

CEE of the Zonal Railways

Rail Board letter No.

200/RE/161Pt.III (ACTM)

dated31.03.2010



47. SAFETY RULES FOR OHE


1. General

i. Shock treatment

chart

Display of shock

treatment chart

Electric shock treatment chart should be exhibited in every OHE

maintenance depot, equipment room, switching station, cabin, OHE

inspection car shed, loco shed, OHE inspection car and wiring train and

also in offices of SM, ASM, CYM, AYM and HTXR.

Treatise (OHE) page

159

ACTM Volume- II,

Part I, para-20332 page

- 87 ii. First Aid Boxes Provision of

First aid box

First aid box shall be kept at every switching station, maintenance depot,

in OHE Inspection Car, breakdown vehicle and wiring train

iii. Testing Testing of tools Ropes, come-along clamps, tirfor etc should be tested once in six months

at least, in the presence of SSE/JE and record of such tests maintained in

each depot

2. Documents to be kept with OHE Supervisors for Work on OHE

i. Lay out plan Keeping of drawing A Complete set of structure erection drawings, lay out plans,

sectioning diagram, SWR and general supply diagram etc

pertaining to the overhead equipment under his charge

Treatise (OHE) page

159

ACTM Volume- II, Part

I, para-20333 page - 87 ii. Responsibility

of SSE/JE

(OHE)

Responsibility of

SSE/JE (OHE) or in

his absence the

senior most official

in-charge of the

work

i. Ensure that all safety rules prescribed are actually observed by

the staff when carrying out work on traction installations.

ii. Duty of the supervisor to remind the staff periodically of the

various safety rules to be observed at work site

3. Permit to work

i. Commencing

of work

PTW shall be taken Before commencing work on any part of the dead OHE or within 2

m of live OHE, a permit to work shall be obtained from TPC or

other authorized person

Treatise (OHE) page

159


I, para-20334 page - 87




4. Protection of Staff against Traffic Movements and Protection of Trains

Protection of

staff

Working as per GR &

SR

i. The supervisory official in-charge of work on OHE shall observe

relevant provisions of GR and SR for protection of trains before

work on OHE is commenced and for the whole time the work is in

progress.

ii. Measures laid down for power block shall be observed by all

concerned to prevent accidental energisation of the section under

power block on account of electric train movements.

Treatise (OHE) page 159

ACTM Volume- II, Part I,

para-20335 page - 87

5. Earthing before Commencement of Work

Earthing Earthing before

commencement

i. All metallic parts within reach (either directly or through tools

etc) shall be earthed, after they are made dead.

ii. Each working party shall be protected by at least two

independent earths, one on each side of a working party.

iii. If the distance between the working parties exceeds 100 m

intermediate earths shall be provided in such manner as to

ensure that the distance between earths does not exceed 100 m.

iv. Even when earthing is provided by isolator switches with

earthing heels, additional temporary earths as about shall also

be provided.

Treatise (OHE) page

159


I, para-20336 page - 87

6. Procedure for Providing Temporary Earths

i. Safety of

working party

& temporary

earth

Men posted on both

side of working

party for warn of

working party

Men shall be posted on both sides of the site of work to warn the

working party of any approaching train on the same track and

adjacent track(s).

Treatise (OHE) page

159


I, para-20337 page - 88 ii. Permit to work The permit-to-work shall be obtained prior to commencing work to

make sure that power supply has been switched off.




iii. Providing temporary

earth on OHE

For providing temporary earth on the OHE or other equipment after

it has been made dead, only discharge / earthing pole assembly

specially designed for this purpose alone should be used. The cable

shall be flexible and should have adequate cross-section (40 mm 2)

to be able to withstand short circuit currents.

iv. Procedure of

earthing clamp on

OHE mast

Fix the earthing clamp securely to a mast at least one span away on

one side of the work site after making sure that the mast to earth rail

bond of this masts is intact. Alternatively, the clamp may be fixed to

the bottom flange of one of the traction rails, taking the cable under

the rails.

v. Procedure of

earthing clamp in

single-rail-track-

circuited sections on

OHE mast

In single-rail-track-circuited sections, the earthing clamp should be

fixed to the traction rail i.e., non-track-circuit rail; on double-rail-

track-circuited sections the earthing clamp should be fixed to the

mast.

The mast-end or rail-end clamp of the discharge / earthing pole

assembly should be checked for tightness just before connecting the

top clamp on to the OHE as the earthing clamp fixed to the rail or

mast in advance could have worked loose

vi. Discharge rod hook

secure to the OHE

conductor

Hook securely with a snap action the top clamp of discharge /

earthing pole assembly to the OHE conductor close to the mast /

structure and tie the earthing pole to the mast / structure. Never

hook on the top hook of the earthing cable to the OHE, till the other

end has been first connected to earth

vii. First earthing clamp

to the mast then top

clamp to be hooked

OHE

The earthing clamps should always be fixed to the traction rail or

mast/ structure first and then the top clamp should be hooked to the

OHE to be earthed.

Repeat operations 4 and 5 for the second temporary earth on the

other side of the working party.




Staff may start

maintenance work

After temporary earths have been fixed on the OHE on both sides of

the work site, staff may proceed with the maintenance work.

After completion of

work men, material,

earth remove on the

OHE and OHE

supply restored

After work is completed and men, materials and tools have been

removed and the OHE is clear, the above earthing rods may be

removed in the reverse order i.e., first remove the hook on the OHE

and then the clamp fixed to the rail or mast / structure.

After warning all staff that supply will be restored and that they

should keep away from the equipment, the permit-to-work may be

returned and supply restored.

7. Precautions in Regard to Discharge / Earthing Pole Assembly

i. Discharge /

Earthing pole

assembly

Checking of cable

continuity once a

fortnight

The continuity of the cable connection between the top clamp and

the earthing clamp should be checked once a fortnight.

Treatise (OHE) page

159

ACTM Volume- II,

Part I, para-20338

page - 88 ii. Cable should be renewed if more than 20% strands are broken.

during use, cable should be continually examined for fraying and

breakage of strands.

iii. Inspection of

Discharge / Earthing

pole assembly

Discharge / Earthing pole assembly should be inspected by

TFO/ATFO once a month.

iv. Procedure of

discharge / earthing

pole assembly

during accident

During accidents when slewing the OHE and in similar

circumstances, the discharge / earthing pole assembly should be

provided at a location where it is not likely to be interfered with

during crane working or due to work on the permanent way.




8. Work on OHE or any Conductor having a Sectioning Point

When work is to be carried out on OHE or conductors which are not electrically bonded, following additional precautions are required

i. Work on OHE Work at sectioning

point

The two sections of conductors or ends of conductor which may

have snapped may be at different potentials. Each end should,

therefore, be separately earthed at two points after switching off

supply to both parts of the OHE or conductor.

Treatise (OHE) page

159

ACTM Volume- II,

Part I, para-20339

page - 89 ii. This precaution should also be observed when working on or in the

vicinity of a sectioning point and cut-in insulators.

iii. Neutral Sections should be treated as live equipment and earthed

separately at two points on either side of the work party before

commencing work

iv. When work is to be carried out on an isolator, both sides of the

isolator should be earthed at two points or more conveniently,

isolator jumpered temporarily.

9. Rules for use of Ladders

i. Ladder Use of ladder It shall be the responsibility of the supervisor to ensure that ladders are

stored in a protected enclosure properly maintained and reconditioned as

often as required.

A ladder should never be in such a position so as to likely to fall on a live

part.

Treatise (OHE) page

159


I, para-20342 page - 89

ii. Ropes used with ladders should be of cotton or jute. Use of metallic ropes

is prohibited. A ladder should be held by one person on the ground to

prevent slipping, while the top end should be tied to the supporting

structure or conductor to keep it in position and prevent in sliding away.

iii. Ladders should never be allowed to fall on or rest against the contact wire.




iv. If the nature of the work involves risk of the conductor breaking

into two parts (due to opening out of sleeves or splices) the ladder

shall not be rested against the conductor. Trolley ladders shall be

used in such cases.

v. More than one person shall not normally be allowed on a ladder as

far as possible

vi. Climbing on a ladder with wet or slippery foot-wear is forbidden.

Ladders should not be used for transporting materials

vii. A rope should be used to pass tools or any equipment to the men

working on a ladder

viii. No one should stand directly below a work spot under a ladder.

10. Other Important Precautions to be taken while Carrying out Works on OHE

i. Other

Important

precautions

While working on

OHE

The useful cross section of a conductor shall not be reduced while

making joints.

Treatise (OHE) page

159

ACTM Volume- II,

Part I, Para- 20343,

page- 90

ii. Any contact with conductors which are not specifically earthed is

forbidden.

iii. The strength of the anchoring rope should not be less than that of

the cable to be anchored.

iv. Temporary anchoring of conductors should only be done by using

stranded flexible steel cable at least of the same tensile, strength as

the cable to be anchored. Use of two cables of different strengths

joined together is prohibited. Use of cotton, jute or other non-

metallic ropes for anchoring is forbidden.

v. Structure bonds and cable connections of the structure to earth shall

be maintained in proper condition. No heavy materials should be

stacked on the rail bonds; transverse bonds between two rails of the

same track as well as rails of different tracks shall also be

maintained in proper condition.




vi. Where rails to which structures are connected are replaced, the

structure shall be connected to the new rail immediately after it has

been laid.

11. Work on Overhead lines Running Parallel to Electrified Tracks

No work on any span of any overhead line (LT power line or other line) running parallel to an electrified track where the minimum

distance between the nearest conductor of the overhead line and he centre-line of the nearest electrified track is less than 8m, should be

done without switching off power from the 25kV traction line(in addition to making dead and earthing the overhead line on which

work is to be carried out, in the normal manner ) excepting for the following specific items for work

i. Overhead lines Work on Overhead

lines Running Parallel

to Electrified Tracks

Replacement of lamps, if below line Treatise (OHE) page

159


I, Para- 20345, page- 90

ii. Painting of structures/poles upto a distance of 2 m from the live

wires of the power line.

iii. Reinforcement of foundations where such reinforcement does not

involve any prior weakening of the foundation at any time during

the work.

iv. Replacement of aerials fuses

12. Procedure for Effecting Shut-Down for Work on Auxiliary Transformers

Auxiliary

Transformers

Procedure for

Effecting Shut-down

for work on auxiliary

transformers

Power supply to auxiliary transformers is affected through fuse-

switches on the 25 kV side and the LT side is controlled through

fuses or double pole iron clad switch fuses. Isolating fuse switches

should be opened out and fuses removed both on the HT and LT

sides and the transformer earthed before starting work.

Treatise (OHE) page

159


I, Para- 20344, page- 90

13. Isolators

Isolator Precaution taken

while opening and

closing of isolator

switches

Isolating switches on the 25kV system shall not be opened or closed

when current is passing through them. Normally, isolators should

only be opened or closed, after power supply to the section has been

switched off by opening the appropriate interrupter.

Treatise (OHE) page

159


I, Para- 20347, page- 91




14. Petroleum Sidings

The following arrangements/precautions would be necessary:-

i. Petroleum

Sidings

Arrangements/preca

utions

An equi potential link between the petroleum sidings installation

earth and the track via a switch.

Treatise (OHE) page

159


I, Para- 20348, page- 91 ii. Setting up of neutral zones (insulating joints) in the track to avoid

any risk of propagating stray current.

iii. Setting up of neutral zones / sections in the contact wire similar to

loco inspection pits

iv. The tracks must be provided with longitudinal bonds on both the

rails as well as transverse bond (30m intervals). All masts and

metallic structures in the vicinity of the track / sidings should be

provided with structure bonds. Copper rivets should be used for

bonding.

v. 10 ohm earths must be connected to the petroleum siding on each

side at the insulated joint

vi. Precautions

vii. No oil tanker is permitted to stable under live OHE for inspection

purpose

viii. Fueling to be done by side filling arrangement only.

ix. Pipe lines in the vicinity of the track should be properly earthed.

x. Minimum 2 m electrical clearance from live OHE of the adjacent

track or only other structure nearby must be maintained.

xi. During filling/loading and unloading of petroleum products, the

isolators at the neutral section of OHE should be kept open to

ensure that the OHE is dead and earthed.




15 Protective Helmets

i. Helmet Staff are advised

wear helmets

At the work-site, staff are advised to wear helmets to protect their

heads against any tools or equipment which may drop down

accidentally, as well as to minimize head injury in case of accidental

fall from a height.

Treatise (OHE) page

159


I, para-20340 page - 89

16 Safety Belt

i. Safety Belt Staffs should wear

safety belt while

working on structure

/ ladder

Staffs working on structures or a ladder are advised to protect

themselves against an inadvertent fall by wearing a safety belt for

supporting themselves by a rope sling.

Treatise (OHE) page

159


I, para-20341 page - 89

17 FORMS AND REGISTERS

The recommended proforma for power block and permit-to work messages have been given. Particulars of other essential records to be

maintained in regard to OHE maintenance are given below:

i. Forms and

Registers

Records to be

maintain

Daily report of OHE maintenance to be submitted by the Supervisor

in-charge of field work to ATFO. The form in which reports are to

be submitted by the ATFO/CTFO to AEE (TrD) and

Sr. DEE / DEE (TrD) may be laid down locally by each Division.

Treatise (OHE) page

159


I, Chapter V, para

20349, page-91 ii. Register for foot-patrol reports. The reports regarding foot-

patrolling should be entered by the linesman in a register to be

maintained for the purpose by each section supervisor.

iii. Cantilever assembly maintenance register.

iv. Register of contact wire thickness measurements.

v. Register of clearance under over line structures.




vi. Records to be

maintain

Register of earth resistance measurements.

vii. Register of current collection tests shall be maintained

viii. Register of regulating equipment shall be maintained by each depot

/ sub-depot for its jurisdiction. This register should have a page

allotted for each regulating equipment. Particulars of adjustments

carried out, amount of catenary and contact wire cut etc. shall be

recorded in this Register, indicating the dates on which these items

of work have been done.

ix. Register for isolator Switches shall be maintained by each depot /

sub-depot indicating dates on which the isolators have been

inspected and the details of work carried out.

x. Register for Turn outs and Cross over shall be maintained by each

depot / sub-depot. This should indicate the dates on which each turn

out / crossover has been checked for adjustment and particulars of

work done.

xi. Register of vulnerable foundations- This should contain details of

checks carried out on foundations at vulnerable locations, such as

on over bridges, embankments susceptible to erosion etc.

xii. Register of feeder lines shall be maintained by concerned

depots/sub-depots to indicate particulars of patrolling of 25kV

feeder lines and maintenance carried out on such feeder lines.

xiii. Register of critical implantations- The annual check of implantation

at critical locations shall be recorded in this Register




xiv. Records to be

maintain

Register of level crossing - This should contain dates on which

height of contact wire at level crossings as well as that of the height

gauges at level crossing have been checked.

xv. Register of splices.

xvi. Register of OHE break-downs - Each depot/sub-depot should

maintain particulars of OHE break-down occurring in its

jurisdiction. For each break-down a page should be allotted.

References to detailed reports submitted should also be given to

facilitate investigations subsequently.

xvii. Register may also be maintained for any other additional items in

the proforma prescribed by CEE.

xviii. The register should be of A-4 size. As they are required for

permanent record they should be cloth-bound. The nomenclature of

the register should be shown on the cover in 6 mm block letters.



REFRENCES

1. Manual of AC Traction Maintenance and Operation Volume II (Part–I) Fixed Installations 1994

2. Manual of AC Traction Maintenance and Operation Volume II (Part–II) Fixed Installations 1994

3. Special Maintenance Instruction, Specifications, Instructions letters issued by RDSO Lucknow

4. Treatise of OHE Indian Railways Institute of Electrical Engineering NASIK.

5. Indian Railways Schedule of Dimensions (SOD) 1676 mm Gauge (BG), Revised 2004

6. Manual of OLIVER-G plus M/s. Total Solution, Bhopal

7. Details of Thermo Vision Camera 28th MSG TRD at SCR on Feb 2011 item no. 28.19

8. Circulars, Instructions, Correction Slips and letters etc issued by Railway Board New Delhi

9. Suggestion given by participant for various Railways during seminar conducted on 29.04.2016 at IRCAMTECH,

Gwalior.

To upgrade maintenance technologies and methodologies and achieve improvement in productivity and performance of all Railway assets and manpower which inter-alia would cover reliability, availability, utilisation and efficiency.

OUR OBJECTIVE

CAMTECH is continuing its efforts in the documentation and up-gradation of information on maintenance practices of electrical assets. Over the years a large number of publications on electrical assets have been prepared in the form of handbooks, pockets books, pamphlets & video films etc. These publications have been uploaded on the internet as well as rail net.

For downloading these publications please do following:

1. On internet visit : www.rdso.indianrailways.gov.in

Go to Directorates CAMTECH Publications for download Electrical Engineering

2. On Railnet visit RDSO website at 10.100.2.19

Go to Directorates CAMTECH Publications for download Electrical Engineering

For any further information regarding publications please contact:

Director (Elect.) – 0751- 2470740 (O) BSNL, 9752447030 (CUG)

SSE/Electrical - 9755549297 (CUG)

E-mail at [email protected]

Fax - 0751- 2470841

Write at : Director (Electrical)

Indian Railways

Centre for Advanced Maintenance technology,

In front of Hotel Adityaz,

Airport Road, Maharajpur,

Gwalior, Pin code – 474 005

http://www.rdso.indianrailways.gov.in/