specification for oil cooling unit with casing for ... spec for... · specification for oil cooling...

of 23

Issued on XX/10/2017 Spec. No. RDSO/2016/EL/SPEC/0123, Rev. ‘1’

lR;eso t;rs

GOVERNMENT OF INDIA

MINISTRY OF RAILWAYS

Specification for Oil Cooling Unit with Casing for

Transformer/Converter of Three Phase Locomotives

Specification No. RDSO/2016/EL/SPEC/0123, Rev. ‘1’

Issued on XX/10/2017

ELECTRICAL DIRECTORATE

RESEARCH, DESIGNS & STANDARD ORGANISATION

MANAK NAGAR, LUCKNOW – 226 011

Prepared by Checked by Issued by

SSE/SE&AM

ADE/SE&AM

EDSE/SE&AM

Approved by Signature

Sr.EDSE

of 23

Issued on XX/10/2017 Spec. No. RDSO/2016/EL/SPEC/0123 Rev. ‘1’


SSE/SE&AM

ADE/SE&AM

EDSE/SE&AM

Status of Revision

S. N. Date of Revision Page No. Revision Reasons for Revision

1. - All 0 First Issue.

2. XX/10/2017 7 1 1. Clause no: 9 stipulated as “The

Motor, Impeller and Casing shall be

interchangeable with other make so that

the performance of the Oil Cooling Unit

is kept within the limits of the standard ”

modified to “ The motor and blower unit

(casing + impeller) shall be

interchangeable with other make”

2. Clause no: 16 stipulated as “The

drawings are for guidance. However,

the dimensions are to be followed so

as to ensure interchangeability of

motor, impeller and casing with other

makes”. modified to “The drawings

are for guidance. However, the

dimensions are to be followed so as to

ensure interchangeability of motor,

blower unit (impeller + casing ) with

other makes”.

3. Clause no: 16 table item no : vi

title stipulated “Impeller for Oil

Cooling Unit for

transformer/converter” modified to

“Impeller for Oil Cooling Unit for

transformer/converter ( for guidance

only )”.

4. Clause no: 16 table column title

‘Revised Drawing number as per RDSO

specification’ deleted.

of 23



SSE/SE&AM

ADE/SE&AM

EDSE/SE&AM

INDEX

Clause Number Item Page no

1.0 Scope 4

2.0 Terminology, Symbols and Units. 4

3.0 Reference Standards 4

4.0 Technical Particulars 4

5.0 Service Conditions. 5

6.0 Design and General Construction 6

7.0 Special construction features 6

8.0 Finish 7

9.0 Inter-Changeability 7

10.0 Marking plate 7

11.0 Maintenance Instructions 7

12.0 Drawings 7

13.0 Data 7

14.0 Tests 7-10

15.0 Field Trial 10

16.0 List of Drawings 10

Technical particulars of oil cooling unit. Annexure-I 11&12

Standard procedure for calculation of fan delivery

parameters Annexure-II 13-15

Data Sheet of Oil Cooling Unit

Annexure-III 16

Motor for Oil cooling Unit Annexure-IV 18

Oil Cooling Unit for transformer/converter

Annexure-V 19

Annexure-VI 20

Annexure-VII 21

Annexure-VIII 22

Annexure-IX 23

of 23



SSE/SE&AM

ADE/SE&AM

EDSE/SE&AM

SPECIFICATION AND TEST SCHEDULE FOR OIL COOLING UNIT FOR

TRANSFORMER /CONVERTER

1.0 Scope

1.1 This specification covers the performance requirements and tests of Oil Cooling

Unit(OCU) with Centrifugal Design Impellers for transformer/converter fitted in 25 KV

AC/50 Hz 3 phase drive electric locomotives.

1.2 Oil Cooling Unit includes following.

- Blower casing

- Mounting Base

- Blower including 3 –phase Induction motor

1.3 Each locomotive is equipped with 3 auxiliary converters each rated at 100 KVA. These

converters directly gets supply from a common auxiliary winding of 1000 V (corresponds

to 25 KV catenary voltage) from the main transformer. The three phase output voltage of

the auxiliary convertor 1&2 feeds variable voltage and variable frequency to the Oil

Cooler Unit in 3 steps (17 Hz, 33Hz, and 50 Hz) by the control electronics which gets

signal from the temperature sensors in Oil Cooling Unit circuit.

1.4 All OEMs who were approved for centrifugal design OCU as per CLW specification no.

CLW/ES/3/0647 Alt. E will remain approved with this specification also with same

status.

1.5 All the provisions contained in RDSO’s ISO procedure laid down in Document

No.QO-D-7.1-11 dated 19.07.2016(titled “Vendor-Changes in approved status”)and

subsequent versions/amendments thereof, shall be binding and applicable on the

successful vendor/vendors in the contracts floated by Railways to maintain quality of

products supplied to Railways.

2.0 Terminology, Symbols and Units.

For the purpose of this specification, the definitions given in IS: 4894 and shall apply.

3.0 Reference Standards

In preparing this specification assistance has been taken from the following

specifications.

IS: 4894 - Specification for centrifugal fans.

IS: 12075 - Measurement and Evaluation of Vibration of Rotating Electrical Machines.

ISO-1940 - Specification for dynamic balancing.

IEC 61373 - Shock & Vibration test.

4.0 Technical Particulars

The technical particulars of Oil Cooling Unit is given under Annexure-I.

of 23



SSE/SE&AM

ADE/SE&AM

EDSE/SE&AM

5.0 Service Conditions.

5.1 The equipment and mounting arrangement shall be of robust design for traction duty and

shall withstand satisfactorily the vibration and shocks normally encountered in service as

indicated below:

a) Maximum vertical acceleration 1.0g

b) Maximum longitudinal acceleration due to shock. 3.0g

c) Maximum transverse acceleration 1.0g

5.1.1 The vibrations are of sine wave form and the frequency ‘f’ vibration is between 1 Hz and

50Hz. The amplitude ‘A’ expressed in millimeters is given as a function of f, by the

equations:

A= 25/f for values of f from 1 Hz to 10 Hz

A= 250/f2 for values of f exceeding 10 Hz upto 50Hz.

5.1.2 In the direction corresponding to the longitudinal movement of the vehicle, the

equipment is subjected for 2 min to 50 Hz vibration of such a nature that the maximum

acceleration is equal to 3g (amplitude ‘A’=0.3mm).

5.1.3 The level of harmonics in three phase electric locomotives is of the order of 50% each for

voltage & current.

5.1.4 Climatic and Environmental conditions

Atmospheric

temperature

: Maximum temperature of metallic surface under the Sun: 75oC

and in shade: 55oC .

Minimum temperature: - 10oC (Also snow fall in certain areas

during winter season).

Humidity : 100% saturation during rainy season.

Reference site

conditions

: i) Ambient temperature: 50oC .

ii) Humidity: 100%.

iii) Altitude: 1776 m above mean sea level.

Rain fall : Very heavy in certain areas.

Atmospheric

conditions

: Extremely dusty and desert terrain in certain areas. The dust

concentration in air may reach a high value of 1.6 mg/m3. In

many iron ore and coal mine areas, the dust concentration is very

high affecting the filter and air ventilation system.

Coastal area : Humid and salt laden atmosphere with maximum pH value of 8.5,

Sulphate of 7 mg per liter, maximum concentration of chlorine 6

mg per liters and maximum conductivity of 130 µ Siemens / cm.

Wind speed : High wind speed in certain areas, with wind pressure reaching

150 kg/m2.

of 23



SSE/SE&AM

ADE/SE&AM

EDSE/SE&AM

6.0 Design and General Construction

6.1 Drive and coupling

The fan impeller shall be directly mounted on the motor shaft. A Steel/Aluminium boss of

circular shape should be cast/rolled and fixed with bolting /welding/brazing to Aluminum

impeller (centrifugal design). The drive may be by a key of adequate strength with the

impeller locked in position shall be further locked against, unscrewing in service by

locking plates. Alternatively a tapered shaft without a key but with locking arrangement by

bolt and locking plate may be used.

6.2 Direction of rotation

An arrow indicating the direction of rotation shall be permanently marked on the blower

casing.

6.3 Balancing

The rotor and the blower impeller shall be dynamically balanced individually, in quality

grade G 2.5 of ISO-1940.

6.4 Vibration:

The peak to peak value shall not exceed 25 microns on motor body, foot and bearing of

motor and 40 microns at blower casing.

6.5 Lifting arrangements

Suitable lifting arrangement for the blower fan and the motor separately and for the

complete unit shall be provided.

7.0 Special construction features

7.1 Special manufacturing processes: As the blowers operate for long periods at high speeds;

the impeller blade should be designed with a higher margin of safety as compared to

normal industrial designs and stress calculation for the same shall be furnished.

7.2 Casing

Casing should be of heavy duty industrial design and shall be of mild steel with minimum

thickness of 3 millimeter or Aluminium alloy of 5 millimeter thickness. It should not

deform during lifting. It should be of single side intake having mixed flow form with axial

intake direction and radial discharge direction with centrifugal impeller flow fan. All

outside welds of the housing should be welded continuously. Casing shall be designed as

per existing arrangement of centrifugal fans provided on 25 KV ac electric locos type

WAP-5 & 7 /WAG-9.

The inlet cone may be manufactured by spinning/fabrication/welding process. It shall not

be hammered to give the cone shape. Inlet cone shall be die formed.

7.3 The mounting arrangement of the blower on the casing shall be properly secured so as to

avoid loosening during the vibrations countered in service.

7.4 Centrifugal Impeller can be Fabricated /Casted. The dimension stipulated in the drawing

placed at Annexure –IX is for reference.Impeller diameter shall not be more than 710 mm.

of 23



SSE/SE&AM

ADE/SE&AM

EDSE/SE&AM

8.0 Finish

The fan motor, blades and the casing shall be suitably treated to remove rust and should

be coated with an anti-rust primer and finished with two coats of RAL 7030 stone grey

silk paint. All hardwares shall be cadmium plated.

9.0 Inter-Changeability

The motor and blower unit (casing + impeller) shall be interchangeable with other make.

10.0 Marking plate

Each Oil Cooling Unit shall have a suitable name plate having the following information

engraved/punched on it:

i) Manufacturer’s name, Type and Serial Number.

ii) Air Delivery

iii) Total Head at 200C.

iv) Rated Speed.

v) Make of the Motor

vi) Power consumption in KW.

vii) Impeller Diameter.

viii) Weight of the unit.

ix) Manufacturing Date and Year.

x) Impeller Serial Number , Manufacturing Date & Year to be punched /etched on

Steel /Aluminium boss.

11.0 Maintenance Instructions

The manufacturer shall supply detailed Maintenance Instructions as desired by the

purchaser.

12.0 Drawings

The drawings (to be asked by the purchaser) giving the overall dimensions of the Oil

Cooling Unit shall be supplied with the tender.

13.0 Data

The particulars of the Oil Cooling Unit set shall be furnished in the data sheet at

Annexure -III.

14.0 Tests

14.1 General

Tests are classified as Type and Routine tests.

14.2 Type & Routine tests on Motor

The Type & Routine tests on prototype motor shall be conducted as per RDSO

specification no. E-10/3/09(Motor) with latest amendments.

of 23



SSE/SE&AM

ADE/SE&AM

EDSE/SE&AM

14.3 Tests on Oil Cooling Unit

The following are the different tests on the complete Oil Cooling Unit with Casing.

a) Type Tests

i) Air Delivery Test.

ii) Starting Time Test.

iii) Starting Duty Test.

iv) Endurance Test.

v) Vibration level Test in line with IEC 61373.

vi) Weighment.

vii) Checking of bearing by shock pulse meter.

viii) Checking of dimensions, workmanship, clearances of impeller fixing and locking

arrangement.

ix) Starting Current , Running Current , Starting Time with full load at

- 373V, 33Hz

- 415V, 50Hz to be recorded.

x) The balancing of rotor with impeller shall be done and to be witnessed by

inspecting officials. The balancing shall conform to grade 2.5 of ISO-1940.

xi) Visual Inspection for workmanship and Dye Penetrant Test (DPT) on impeller

welding.

xii) Noise measurement at a distance of one meter from the equipment in all direction.

b) Routine Tests

i) Checking of obligatory dimensions and clearances of impeller fixing and locking

arrangement.

ii) Starting time test

iii) Vibration level test.

iv) Condition of bearing by shock pulse meter.

v) Visual inspection for workmanship and DPT on impeller welding.

vi) Noise measurement at a distance of one meter from the equipment in all direction.

Unless otherwise specified in the contract the test and the method of measurement

adopted shall comply with Indian Standard specifications for centrifugal flow

fans.

14.3.1 Details of Type Tests

14.3.1.1 Air delivery test

Test shall be carried out with the supply to the driving motor maintained at 415(± 10%)

at 50Hz. However it is desirable to conduct the tests at 33 Hz also with supply from the

VVVF drive. Adequate number of observations shall be made on both sides of the

operating point to plot the characteristic curve. Measure the following quantities.

i) Line voltage

ii) Line current

of 23



SSE/SE&AM

ADE/SE&AM

EDSE/SE&AM

iii) Power input

iv) Speed

v) Total pressure.

vi) Ambient temperature.

The manometer pressure readings shall be taken at 4 points at least to arrive at a mean

value as per IS 4894.

Calculate the blower output at standard conditions Wt. =1.2 kg/m3.The standard

procedures to be followed for calculation of fan delivery parameters is given under

Annexure-II.

14.3.1.2 Starting time test

With a test installation similar to that adopted for the air delivery test, start the blower

successively at 415V and 373V. Measure oscillographically or by any other accurate

method, the starting time of the motor for Oil Cooling blower Unit from zero speed to

the full speed. Record starting current, running current, starting time with full load at

373V, 33Hz and 415V, 50Hz.

14.3.1.3 Starting duty test

The Oil Cooling Unit shall be subjected to repeat “start and stop” cycle for 1000 times

at a supply voltage of 415V. The ‘ON’ and ‘OFF’ period shall be 1 minute in each case.

If the unit takes more than 1 minute to stop fully, the next start shall commence

immediately after the unit has stopped. At the end of the test, the efficacy of impeller

locking device shall be checked; the impeller shall then be dismantled and various parts

like key, key way and the fit of the impeller on the shaft shall be examined for wear and

any abnormal condition.

14.3.1.4 Endurance test

This test shall be conducted for a period of 48 hours with rated output and head with

415 V supply at the motor terminals. After the test, the blower and the motor shall be

dismantled and examined for wear and tear of the parts and conditions of bearings etc.

14.3.1.5 Vibration level test.

For the measurement of vibration intensity, electronic vibration measurement

equipment having a frequency range of 5 to 2000 CPS shall be employed. Vibration

measurement shall be made at motor body, foot and bearing of motor and blower

casing.

Limits of vibration intensity: The peak to peak value shall not exceed 25 microns on

motor body, foot and bearing of motor and 40 microns at blower casing.

14.3.1.6 Condition of bearing by shock pulse meter

Condition of bearing shall be checked at rated voltage and frequency. The deflection

shall be within green zone of the instrument.

14.3.1.7 Testing of material and welding strength.

(i) Suitable size of test piece of material used for manufacturing of impeller shall be

prepared for testing .

of 23



SSE/SE&AM

ADE/SE&AM

EDSE/SE&AM

(ii) Two sets of test piece shall be welded & be kept ready for checking the welding

strength.

Note: The test for welding strength shall preferably be done at firms premises.

However, same may be tested at Government Accredited Laboratory if facility

is not available.

14.3.2 Details of Routine Tests

Same as item no: 14.3 b) and its procedure given in type test 14.3.1

15.0 Field Trial

Oil Cooling Unit with Casing shall be subjected to extensive field trials for a period of

at least 12 months after fitment on locomotives. During field trials; performance of

the OCU with casing shall be observed & recorded.

16.0 List of Drawings

The drawings are for guidance. However, the outer dimensions required so as to ensure

interchangeability of motor, blower unit (impeller + casing ) should be followed.

SN Existing Drawing No.as

per CLW Specification

no: CLW/ES/3/0647 ALT E

Title Page no.

i CLW/ES/3/SK-2/0647 Motor(200L) for oil Cooling Unit for

transformer/converter

ANNEXURE-IV

ii CLW/ES/3//0647 ALT B Oil Cooling Unit for


(for guidance only)

ANNEXURE-V

iii CLW/ES/3/SK-4/0647

ALT B

Oil Cooling Unit for


ANNEXURE-VI

iv CLW/ES/3/SK-5/0647 Bracket for casing(WAG-9) ANNEXURE-VII

v CLW/ES/3/SK-6/0647 Support for bracket , self gripping

rubber gasket, looming bar & MS

channel.

ANNEXURE-VIII

vi CLW/ES/3/SK-1/0647 Impeller for Oil Cooling Unit for


(for guidance only)

ANNEXURE-IX

Note:

a) All rubber items and hardwares shall be procured from CLW approved sources.

b) OEMs shall submit the Bill of material (BOM) and shall get approved by RDSO.

of 23



SSE/SE&AM

ADE/SE&AM

EDSE/SE&AM

ANNEXURE-I

TECHNICAL PARTICULARS OF OIL COOLING UNIT

1. Blower

(i) Type : Aluminum Impeller of centrifugal design

(ii) Fan Duty Point at rated speed

and 200C

: 8.2m3/s at 1781 Pascal

(iii) Rated speed : 2920 rpm

(iv) Driving motor : 30kW Squirrel cage Induction Motor

(v) Details of Pressure drops

- Cooler section ,air

side

: 800Pa

- Inlet/Outlet

ducts/filters

: 930Pa

- Reserve : 51Pa

- Total fan Pressure : 1781Pa

2. Motor

(i) Type : 3 Phase, 30kW, 2 Pole Squirrel Cage, Totally

enclosed surface cooled as per RDSO

specification No.E-10/3/09(Motor) with latest

amendments.

(ii) Frame Size & Mounting

Arrangement

: 200L foot mounted as per IS 1231

(iii) Motor Rating:

(a) Nominal Mechanical Power

:

30kW

(b) Rated Speed : 2920 rpm

(c) Rated Voltage : 415 ±10%V,3 Phase

(d) Rated Current : 50Amp

(e) Starting Current : 320Amp or less

(f) Class of Protection : IP 54

(g) Type of Enclosure : TESC

(h) Duty cycle : S1 continuous

(i) Wave form : Quasi-square wave

(j) Cos Ø : Not less than 0.84

(k) Efficiency : Not less than 88%

(l) Bearing Size : DE & NDE 6312-open type

of 23



SSE/SE&AM

ADE/SE&AM

EDSE/SE&AM

Make: From RDSO approved sources of

relevant size

(m) Insulation : H class VPI (corona resistant copper winding

wire of RDSO approved make should be used)

(n) Harmonics in Voltage : 50%

(o) Harmonics in current : 50%

(p) dv/dt : Less than 1000V/micro second

Note: - Other parameters & performance requirement of motor will remain same as

mentioned in RDSO specification No. E-10/3/09 (Motor) with latest

amendments.

3. Starting performance: The blowers shall accelerate from stop to the full speed within

six seconds over the entire range of supply voltage i.e.415±10%.

4. The following tolerance shall be applicable:

Characteristic Tolerance

Volume flow -5%

Motor Power input +10%

Static or total efficiency -5%

Speed ±10%

5. The centrifugal flow fans covered by this specification are capable of working against

pressure.

of 23



SSE/SE&AM

ADE/SE&AM

EDSE/SE&AM

ANNEXURE-II

STANADARD PROCEDURES FOR CALCULATION OF FAN DELIVERY

PARAMETERS

1. Test set up for air delivery shall be as per IS 4894.

2. Make a sketch of testing duct and record various dimensions of test set up arrangement.

3. Air delivery test shall be carried out at 373V, 415V and 457V, all at 50Hz, 3 phase power

supply to driving motor.

4. Starting from full open position to full close ,adequate number of measurements on either

side of duty point shall be recorded as per procedure given in IS 4894 so that sufficient

data point becomes available for drawing a smooth fan characteristic curve. In any case,

at least 2 readings on either side of duty point and one reading near duty point must be

taken. The suitable no: of charges of mesh with difference holes simulating to 25% ,50%

& 75 % closing shall be available in line with IS 4894.

Observed values starting from full open to

full close position

Observations Full open Full close

Pressure at section AA(Paa) in mmWG

Pressure at section BB (Pbb) in

mmWG

Test speed in rpm

Current(Amp)

Voltage(Volts)

Power Factor

Motor Input(kW)

Frequency of supply

Ambient temperature near section

BB(t) in degree Celsius

5. For each of above observations, the values of air flow, fan total pressure, fan static

pressure; fan efficiency and overall combined unit efficiency shall be calculated and shall

be converted at rated speed and temperature.

6. From the values of air flow and fan total pressure at rated speed and temperature, Fan

characteristics curve along with system resistance curve shall be drawn. The curves for

fan efficiency and static pressure versus flow shall be drawn on same graph. The

intersection of fan characteristics curve and system resistance curve shall be taken as

operating point of the fan. The operating point should fall on right side of the specified

fan duty point.

7. Three set of observations, calculations sheets and curves for 373 V, 415 V and 457 Volts

shall be furnished.

8. Calculation sheet along with formulas to be used for determining fan characteristic curve

& efficiency is as under.

of 23



SSE/SE&AM

ADE/SE&AM

EDSE/SE&AM

Duty Point at 200C as per spec.

Rated Q(m3/s)

Rated FTP at 200C(Pa)

Rated RPM

Fan Diameter

Test Duct diameter in meter, D

Test Duct Area(sq m)

Fan Outlet area(sq m)

Barometric Pressure(mmHg)

‘B’

Coefficient of discharge, Cd

Cd2

Motor efficiency (%)

Observations Observations from

full open to full

close

Paa (mmWG)

Pbb-Ps(mmWG) ,

Ps:- absolute pressure of the

ambient atmosphere.

Test Speed(rpm)

Motor Input(kW)

Amb Temp(t) near section

BB ,0C

Calculations Formulae

Density of air at section BB,

Wt(kg/m3)

1.2 X (B+0.737Ps) X (273+20)

760 (273+t)

Inlet Volume, Qv(m3/hr) 12500XCdXD

2X√(Paa/Wt)

Outlet Velocity (Vo),m/hr Qv/Outlet Area

Velocity Pressure at

outlet,Vpot = Tpot

(mmWG)

Wt X (Vo/16000)2

Velocity Pressure at fan

inlet (mmWG), Vpi Paa X Cd

2

Total Pressure at fan

inlet(mmWG),Tpi Pbb + Vpi

Fan Total Pressure at temp t Tpot - Tpi

of 23



SSE/SE&AM

ADE/SE&AM

EDSE/SE&AM

(mmWG),FTPt

Motor Output (Mo), kW (Motor input x Efficiency)x100

Conversion to Rated Speed and Temperature

Volume at rated speed in

m3/hr,Q1

Qv X Test Speed

Rated speed

Volume at rated speed in

m3/s,Q2

Q1

3600

Outlet Velocity(VO) at

rated speed, m/hr

Q1

Outlet Area

Velocity Pressure at

Outlet at rated speed and

temp, Vpo

1.2 X(VO /16000) 2

FTP at rated RPM and

temp

2

Rated rpm 1.2

FTP X Test rpm Wt

Fan Static Pressure at

rated rpm and temp FTP-Vpo

Shaft Power(kW) at rated

speed & temp

3

Mo X Rated rpm X 1.2

Test rpm Wt

Air power in kW at rated

speed & temp

2.723 X Q1 X FTP X 10-6

Fan efficiency (%)

Air Power

X 100

Shaft Power

Overall efficiency of the

combined unit

(OCB+Motor)(%)

Air Power

X 100

Motor input

of 23



SSE/SE&AM

ADE/SE&AM

EDSE/SE&AM

ANNEXURE-III

Data sheet for Oil Cooling Unit

1. Blower

A.1 Type, model and make.

A.2 Air delivered in cubic meter per minute and total head in mm WG corrected to 200C and

760 mm barometric pressure at rated voltage

A.3 Design data

a) Impeller diameter.

b) Type of impeller blades.

c) Number of blades.

d) Method of fixing of the blades.

e) Clearance between inlet cone and impeller (maximum 6mm and minimum 1.5mm)

f) Maximum shaft speed of the impeller.

g) Motor shaft and impeller bore diameter (maximum and minimum).

h) Method of fixing of impeller on motor shaft and locking arrangement.

i) GD2 value of the impeller (indicated the maximum variation in manufacture).

J) Stress calculation for impeller and casing.

Note: GD2 value of the impeller will be made use for calculating the starting

performance of the blower with regard to the specified electric motor. As such the

value to be furnished should take into account the inertia, the friction and the

resistive torque of the impeller while it is being started.

A.4 The manufacture shall furnish the speed- torque characteristic of the blower. This is

required for matching the motor and the impeller.

A.5 Torque necessary for the blower when working against constant rated head and

delivering the rated output.

A.6 The supplier shall enclose the following characteristic curves at 200C and 55

0C.

a) Total and Static head vs. air delivery.

b) Total and Static efficiency vs. air delivery.

c) Air horse power vs. air delivery.

d) Power absorbed vs. air delivery.

e) Speed vs. Air quantity in m3/sec.

A.7 Vibration level in microns.

A.8 Furnish the welding strength calculation for the joint between impeller and back plate and

cone.

of 23



SSE/SE&AM

ADE/SE&AM

EDSE/SE&AM

A.9 Furnish calculation for locking strength, impeller locking arrangement and key strength.

A.10 Necessary dimensioned drawings of the blowers and its all components showing the

constructional and material specification as per IS or any other relevant international

standard for assembly details shall be submitted.

2. Data sheet for Motor

1 Application

2 Type

3 Rated voltage

4 Number of phases(Star/Delta)

5 Frequency

6 Speed

7 Continuous rating(HP/kW)

8 Rated current

a)At rated voltage (415V)

b)At lowest voltage(373V)

9 Slip at full load in percentage at-

a) Rated voltage (415V)

b)Lowest voltage(373V)

10 Class of insulation

11 Type of enclosure

12 Method of ventilation

13 Type of protection

14 Frame size

15 Overall dimension

16 Type & make of bearing

17 Size of bearing and their estimated L10 life

18 Weight of the motor

- Weight of rotor

19 Rotor construction

20 GD2 value of the rotor(indicate the maximum variation)

21 Starting current and torque in kgm

a) at 373 V

b) at 457 V

c) at 415 V

22 Any deviation from the specification indicating reasons thereof may please be

explained.

23 Corona resistant winding wire used as per amendment no 3

of 23



SSE/SE&AM

ADE/SE&AM

EDSE/SE&AM

ANNEXURE-IV

of 23



SSE/SE&AM

ADE/SE&AM

EDSE/SE&AM

ANNEXURE-V

of 23



SSE/SE&AM

ADE/SE&AM

EDSE/SE&AM

ANNEXURE-VI

of 23



SSE/SE&AM

ADE/SE&AM

EDSE/SE&AM

ANNEXURE-VII

of 23



SSE/SE&AM

ADE/SE&AM

EDSE/SE&AM

ANNEXURE-VIII

of 23



SSE/SE&AM

ADE/SE&AM

EDSE/SE&AM

ANNEXURE-IX

specification for oil cooling unit with casing for ... spec for... · specification for oil cooling...

Documents