2. electrical safety practice

8/8/2019 2. Electrical Safety Practice

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ELECTRICAL SAFETY-

STATUTES, MANUALS

& PROCEDURES

A presentation by

C.P.Geor e



ELECTRICAL SAFETY- STATUTES,

MANUALS & PROCEDUR ES

1. Indian Electricity Act 2003

2. IndianEl

ectricity Rules

3. Safety Systems & procedures

4. Accident prevention methods

5. Safety codes and practices and lack thereof

6. Safety Gadgets



IE Act 2003

Section 53 of the Act provides that ³TheCentral Electricity Authority may in

consultation with the State Government

specify suitable measures for:-

(a) Protecting the public (including the

persons engaged in the generation,

transmission, distribution or trading) from

dangers arising from the generation,transmission, distribution or trading or use of

electricity supplied or installation,

maintenance or use of any electric line or



53 (b) Eliminating or reducing the risksof personal injury to any person, or

damage to property of any person or

interference with use of such property.

(c) Prohibiting the supply or

transmission of electricity except bymeans of a system which conforms to

the specifications as may be specified.

IE Act 2003- Contd.



53 (d) Giving notice in the specified form tothe Appropriate Commission and Electrical

Inspector, of accidents and failures of

supplies or transmissions of electricity. (e) Specifying action to be taken in relation

to any electric line or electrical plant, or any

electrical appliance under the control of aconsumer for the purpose of eliminating or

reducing the risk of personal injury, or

damage to the property or interference with

IE Act 2003- Contd.



Section 73(c) relates to CEA specifying thesafety requirements for construction, operation

and maintenance electric plants and electric

lines.

Section 161 relates to reporting of accidents

and inquiry of accident. Section 162 deals with appointment of Chief

Electrical Inspector and Electrical Inspector.

IE Act 2003- Contd.



Section 185(1) is regarding repeal of the IndianElectricity Act, 1910, the Electricity (Supply)

Act, 1948 and the Electricity Regulatory

Commissions Act, 1998.

Section 185(2) (C) states that Indian Electricity

Rules, 1956 made under Section 37 of theIndian Electricity Act, 1910 as it stood before

such repeal shall continue to be in force till the

regulations under Section 53 of this Act are

IE Act 2003- Contd.



In exercise of powers, conferred Section 37

of Indian Electricity Act 1910, Electricity

Rules were made by Central ElectricityBoard.

These Rules have been saved in the

Electricity Act, 2003 Section 185 and shall

continue to be enforced till regulations/rules

under Section 53 of the Electricity Act 2003

IE Rule 1956



IE Rules

1. Preliminary

Covering Definitions &

Authorizations

2. InspectorsCovering the Authority &

related aspects of Electrical

Inspectors

3. License

Covering the procedure

of Obtaining the License

for Supply of Electricity

4. General SafetyRequirements

Covering the safety aspects

pertaining to Electric

Supply Lines & Apparatus



IE Rules5. General Conditions

relating to Supply & Use

of Energy

Covering the Power Supply

aspects related to

Consumers

6. Electric Supply Lines,

Systems & Apparatus for

Low & Medium Voltages

Covering Earthing Systems

& Testing

7. Electric Supply Lines,

Systems & Apparatus for

High & Extra High

Voltages

Covering the Approvals.

O&M, Testing, Earthing &

other aspects

8. Overhead Lines

Covering the Statutory

Requirements forOverhead Lines of all

voltag e levels



IE Rules

10. Additional Precautions tobe adopted in Mines & Oil

Fields

Covering the Electrical

installations / services in Mines

& Coal Fields11. Miscellaneous

Covering the penalties,

Relaxation provisions,

Standard forms & training

9. Electrical TractionCovering the Electric

Traction System



General Safety Requirement20 rules from Nos. ² 29 to 46

Rule

No.Description Coverage

29

Construction,

installation, protection,

operation &

maintenance of

electric supply lines& apparatus

All electric Supply lines

& apparatus to be of sufficient rating for power,

insulation, fault current &

mechanical strength

Should conform to BISspecifications



30 Service Lines

& apparatus on

Consumer's

premises

The Electrical lines / apparatus in

consumer¶s premises under

supplier¶s control to be safe

Service Lines to be insulated &secured under all conditions

The same applies to the

consumer¶s part as well

31 Cut-out onconsumer¶s

premises

Supplier to provide the suitablecut-out to each conductor other

than the earthed neutral or earthed

conductor & so is the owner

General Safety Requirement




RuleNo.

Description Coverage

32

Identification of

earthed & earthedneutral conductors

& position of

switches & cut-

outs there-in

Indication of a permanent nature to be

provided by the owner of the earthed or

earthed conductor

No cut-out other then a linked switch

should operate simultaneously other than

testing or if the switch is used to control a

generator / transformer

33

Earthed Terminal

on Consumer¶s

premises

Supplier to maintain the accessible

earthed terminal at consumer¶s premises

Consumer should take precautions torotect the same



34 Accessibility

to bareconductors

The owner of the conductor to ensure

that there are no bare live conductors

Live part of the conductors to be

exposed only to the switches that can

render them dead

General Safety RequirementRule

No.


35 Danger Notices

Danger Notice to be provided for all theapparatus at the conspicuous places so

that it is easily visible to all the

personnel



36 Handling of

electric

Supply Lines

& apparatus

Before handling a line precautions of earthing

or other to be taken to discharge it electrically

& to avoid the accidental charging. All persons

should have adequate tools & all safety gadgets

No person should work on live lines

All telecommunication line on supports

carrying HV or EHV lines to be deemed as HV

Line

37 Supply to

vehicles,

cranes etc.

The owner of such apparatus using external

source should provide adequate cut-out

switches

RuleNo.






RuleNo.


38Cables for portable or

transportable

apparatus

Heavily insulated & with adequate mech.

Strength cables to be provided for transportable

apparatus Metallic covering to be provided wherever

applicable & for 1-ph & 3- ph wiring on LT

should have 3 / 4 cores with one easily

identifiable earth wire

39

Cable

protected by

bituminous

material

Other types of pipes (if metallic is not

available) to be used for the cables

Should be tested periodically & the test results

duly recorded by the supplier / owner




Rule No.


40 Street Boxes Street Boxes should be gas / water proof

Distinct sources in street boxes to be made

easily identifiable & adequate safe supports

for HV/EHV systems

Periodic checking should be done & the

street boxes should have proper gas passing

system for any fire/f lash-overs & should have proper covers etc

41 Distinction of

different

circuits

Permanent indication for the distinct circuits

should be their for the apparatus




Rule No. Description Coverage

41 A

Distinction of

theinstallation

having more

than one feed

The installation with more then one fedshould be given a permanent indication for

easy distinction

42Accidental

Charge

The circuits should be arranged in such a

manner that no accidental charging can be

done




Rule No. Description Coverage

43

Provisions

applicable to

protectiveequipment

Fire Buckets, Fire extinguishers should

be conspicuously placed & tested

First Aid boxes & other things proper ly

marked & equipped

Gas mask for Gen. Stn > 5 MW & for

Transformer > 5 MVA

44

Instruction

for

restoration of

persons

suffering

from shock

Instructions in Eng./Hindi to be placed

conspicuously & distributed to all personnel& made them acquainted about

the same

Artificial respirator for every manned

substation




Rule


44 AIntimation of

Accident

The person not below JE to send the

telegraphic report of accident to the

Inspector within 24 hrs and a written

report within 48 hrs of occurrence

45

Precautions to be

adopted by the

consumers,

owners, electrical contractors,

electrical

workmen &

suppliers

Licensed electrical contractor should

execute the installation / change in

network / circuit




Rule


46

Periodical

inspection &

Testing of installation

Any installation should be inspected

within every five years



PERMIT TO WORK

70 mm



Responsibilities

Permit holder is responsible for Contacting the Area Control (SS/CR) to report

on the applicable permit

Co-coordinating equipment conditions & work activities with all job site supervisors

Communicating the conditions of circuits or equipment to all crews/Job site supervisors

Informing the Area Control of any permittransfers to other authorized personal



Notifying the Area Control if there is a changein the scope of work or job conditions

Contacting the Area Control to report clear of

the applicable permit as soon as the work is

completed

Advising the Area Control of any special

circumstances as a result of the work performed

that may affect the operation of the system

Responsibilities



Ensuring that it is safe for the

circuit/equipment to be re-energized

Returning all switching devices &

equipment back to the configurationsfound when accepting the permit

Responsibilities



Reviewing & answering that all

applicable work practices are followed

Responsible for the safety of all

personnel at the work location & for

the overall coordination & supervisionof the job

Responsibilities



Area Control is responsible for

Ensuring that the person requesting the

permit is authorized to receive the permit

Authorizing permits

Responsibilities



T he Departments that utilize the permit & tagging

system are responsible for

Ensuring that revisions/updates to the authorized

personnel list are completed

Ensuring that initial training & annual refresher

training of permit & tagging procedure are

completed Ensuring that personal they have authorized are

trained & qualified as permit holders

Responsibilities



Authorized Personnel List

Proper & safe operations on the electric systemare the qualifications of the people who areresponsible for performance of the work.

It is important that people in charge of jobs be

knowledgeable of the hazards & means for providing safe conditions to accomplish thenecessary work.

For this reason, only authorized people will be permitted to request permits to work onsubstation premises or to perform work oncircuits requiring Circle Control involvement.



Each Zonal manager (Exe. Engineer) shall

determine the qualifications of the personnel

authorized as Permit Holders to hold permits

within substation premises, on circuits or onfeeders.

They shall submit to HOG (Power System

Control) all changes to the Authorized Personnel List. Each Zone shall review the list as required

but not less than once per year.

Authorized Personnel List



Description of tags

DO NOT OPERATE (DOP) Tag

DOP tags are associated with the outage of thecircuit/equipment for which the PTW is obtained

from the Circle Control.

DOP will have the same number as the PTW for the circuit/equipment.

DOP has to be filled by the permit holder and to

be necessarily placed at all theisolating/grounding points for the

circuits/equipments that are taken out or isolated

from the system & are not energized.



The Permit Holder to notify the Circle Control

about the number of DOP tags to be placed on

isolating/grounding points for the

circuits/equipments that are taken out or isolatedfrom the system & are not energized.

DOP tags are to be attached to open switches,

breakers, isolators, disconnects. Jumpers, taps,GO Switches & other means through which

known sources of electric energy may be supplied

to the lines & equipment.

Description of tags




The DOP tag acts as a lock. Once the tag is

attached to a piece of equipment that equipment

cannot be connected to known sources of electric

energy not even for test purposes.

Switching personnel are responsible for

placement & removal of DOP tags.

Description of tags




TAG

Front Back



CAUTION OR DER TAG A Caution Order tag may be used in

conjunction with the PTW

A Caution Order shall be used to providegeneral information on the status of new,abandoned, or abnormal equipment, cables,abnormal isolating features and Transformer and breaker alarms

The caution order is used to notify anyabnormal condition of the equipment.



PURPOSE1. Caution Order tag is used to indicate abnormal

conditions such as failure, hazards, relay

inoperative, equipment not in service, temporary

changes in operating rules etc. This tag can be

placed on either energised or de-energised

equipment. This Caution Order tag may be

issued either to a person or placed on equipmentto designate a particular operating condition.

CAUTION OR DER TAG



(2) DESIGNATING EQUIPMENTFAILURE/DEFECT.

Equipment failures/defects are designated by placing Caution Order tags on control switches,

valves etc. until the equipment is taken out for inspection and repairs.

(3) DESIGNATING HAZARDS,

CAUTIONING AGAINST OPERATION OFSWITCHES, DISCONNECTS, VALVES ANDPUMPS (WHICH PROHIBITS THEOPERATION OF EQUIPMENT)

CAUTION OR DER TAG



(4) ISSUING TO A PERSON

The Caution Order may be issued to a personwhen he/she is working near energised lines or equipment and there is a possibility that the

working personnel accidentally come in contactor foul the equipment.

While getting a caution order issued, theworking party should indicate to the operating

party the possible hazards by way of nature of caution and by way of nature of work.

Contd.

CAUTION OR DER TAG



Contd..

For transmission lines with auto-re-

closing facility, when a Caution Order

of this nature is issued, the re-closing

gear is to be made INOPERATIVE.

CAUTION OR DER TAG



It should be clear ly understood that

A CAUTION OR DER ISSUED TO A PERSON

NEITHER AUTHORISES HIM/HER TOOPERATE THE EQUIPME NT NOR DOES IT

PROTECT HIM/HER FROM OPERATION OR

E NERGISING OF THE EQUIPME NT EXCEPT

WHE N AN AUTOMATIC TRIP OUT OCCURS.

CAUTION OR DER TAG



CAUTION OR DER

Front Back

Ci l t l d id &



Check the

Status & decide

for the Outage of

the Equipment

required

Request Circle Control

for Outage, 2 days in

advance through

mail/written request

Circle control decides &

authorize for outage with

a PTW No. Circle Control

to confirm the number of

DOP tags & the no. of

points where DOP tags

are to be placed

Give the list

of outage with

the area

affected to

Corp. Comm.

For

information to

consumers

SANCHAR &

FM/PRESS

release is done to

inform the

consumers

After getting the PTW

No. the PTW holder

distribute the jobs to

labor with clear

instructions of puttingthe DOP tags at

isolation points &

Back feed the area

All material

& safety

gears to be

arranged

prior to

starting thework

Concerned

site to be

cordonedoff

FLOW CHART EXPLAINING

THE PROCEDURE TO OBTAIN

PTW & USAGE OF DO NOT

OPERATE TAGS



Energize the

equipment &

restore the

power supply

or normalize

the Back feed

Remove all the DOPtags from the isolating

points & un-cordon

the equipment

Inform Circle

Control after completing the

work & clear the

PTW before

energizing the

equipment

Work to be done withall the isolations done

& the relevant DOP

Tags as mentioned to

the Circle Control to

be put at the isolating

point

O i Di ib i h h



Outages in Distribution where the usage

of Safety Tags is warranted

1.Outage of the 11 kv Overhead Feeder (Isolationfrom Grid)

2.Outage of the 11 kv Underground (Cable) Feeder

(Isolation from Grid)3.Outage of the 11 kv Overhead Feeder Section

between Two substations

4.Outage of the 11 kv Overhead Feeder Section between Two substations when Isolations are done by removing the jumpers on the poles

5.Outage of the 11 kv Underground Cable Section

between Two substations



6. Outage of the 11 kv HT Switchgear of a substation7. Outage of the 11/0.433 kv Distribution

Transformer

8. Outage of the LT main feeder cable from thesubstation

9. Outage of the LT Overhead Feeder

10. Outage of the LT Overhead Feeder section where

Isolations are to be done by removing the jumperson the poles

(This is not t he exhaust ive list, and t he Safety

Taggin g & PTW s y st em is Applicable to all t he

Outages in Distribution where the usage




11 KV Bus at the

Grid Station 11 KV

440 V

1st Switching Station

Distribution Transformer

Outage of the 11 kv Overhead

Feeder (Isolation from Grid)

Do Not Operate

(DOP) tags to be put

on these points

PTW for the outage

of this 11 kv feeder istaken

Outage of the 11 kv



11 KV Bus at the

Grid Station 11 KV

440 V



Outage of the 11 kv

Underground (Cable) Feeder

(Isolation from Grid)

Do Not Operate


on these points

PTW for the

outage of this

11 kv

Underground

(Cable) feeder

is taken



11 KV Bus at the

Grid Station 11 KV

440 V



Outage of the 11 kv Overhead Feeder

Section between Two substations

Do Not Operate


on these points

PTW for the

outage of this 11kv Overhead

Section is taken



11 KV Bus at the

Grid Station 11 KV

440 V



Outage of the 11 kv Overhead Feeder

Section between Two substations when Isolations are

done by removing the jumpers on the poles

Do Not Operate (DOP)

tags to be put on thesepoles where jumpers are

removed to isolate

PTW for the


Section is taken



11 KV Bus at the

Grid Station 11 KV

440 V



Outage of the 11 kv Underground Cable

Section between Two substations

Do Not Operate


on these points

PTW for the


Section is taken



11 KV Bus at the

Grid Station 11 KV

440 V



Outage of the 11 kv HT Switchgear

of a substation

Do Not Operate


on these points

PTW for the outage

of this 11 kvSwitchgear in the s/s

is taken

Backend

assembly

flashover or

others



11 KV Bus at the

Grid Station 11 KV

440 V



Outage of the 11/0.433 kv


Do Not Operate


on these points

PTW for the outage

of this DT is taken

Usage of Safety Tags in Distribution (Zones)



11 KV Bus at the

Grid Station 11 KV

440 V



Outage of the LT main feeder

cable from the substation

Cut Out Point at LT

PTW for the outage

of this LT O/H feeder

is taken


tags to be put on the

ACB & the pole where

jumpers are removed to

isolate

U sage of Safety T ags in Distribution (Zones)

Usage of Safety Tags in Distribution (Zones)



11 KV Bus at the

Grid Station 11 KV

440 V



Outage of the LT Overhead Feeder

Cut Out Point at LT

PTW for the outage

of this LT O/H feeder

is taken


tags to be put on the

ACB & the pole where

jumpers are removed to

isolate





11 KV Bus at the

Grid Station 11 KV

440 V



Outage of the LT Overhead Feeder section where

Isolations are to be done by removing the

jumpers on the poles

Cut Out Point at LT

PTW for the

outage of this LT

O/H feeder is

taken


tags to be put on these

poles where jumpers are

removed to isolate

g f f y g ( )



Usage of Caution Order


ACB ACB

Case of ACB Burning

ACB Bypassed to restore the supply

Caution Order to be put at this point

after taking the number from Circle

Control Indicating the abnormal

Condition that the ACB is bypassed but

the supply is restored & the concerned

equipment (ACB) is energized



Outages in Systems where the usage


1.Outage of Power Transformer (66/33 kv, 66/11

kv, 33/11 kv & 11/0.433 kv Stn. Tr.)

2.Outage of Transmission Lines3.Outage of 66/33 kv Bus Bars at the Grid

Substation

4.Outage of 66/33 kv PTs5.Outage of 66/33 kv CTs

6.Outage of HT (66/33 kv) Breaker

i h h



Outages in Systems where the usage


7. Outage of LT (33/11 kv) Breaker

8. Outage of GOD / Earth Switch / Isolators

9. Outage of 11 kv Bus

10. Outage of 11 kv Outgoing Feeder Breaker

11. Outage of Capacitor Banks

(This is not t he exhaust ive list, and t he Safety

Taggin g & PTW s y st em is Applicable to all t he

out ages.)

O tage of Po er Transformer



Outage of Power Transformer

(66/33 kv, 66/11 kv, 33/11

kv)66/33 kv Bus - I

66/33 kv Bus -I I

PTW for

the outage

of this

Power

Transforme

r is taken

To 33/11 kv Bus



points of isolation for

the Power Transformer

O f 66 33 k



Outage of 66 or 33 kv

Transmission Lines

PTW for the outage of this 33 or 66

kv Transmission Line is taken




the 33 or 66 kv

Transmission Line

Grid Station No - 1 Grid Station No - 2





(66/33 kv, 66/11 kv, 33/11

kv & 11/0.433 kv Stn. Tr.)66/33 kv Bus - I

66/33 kv Bus -I I

PTW for the

outage of this

Station (Local)

Transformer is

taken




the Station (Local)

Transformer

11 kv Bus 440 v Bkr



Outage of 66 or 33 kv Bus

Bars at the Grid Substation66/33 kv Bus - I

66/33 kv Bus -I I

PTW for the

outage of this

66 or 33 kv Busis taken

Do Not Operate (DOP)tags to be put on these


the Bus No. - II

11 kv Bus 440 v Bkr



Outage of 66 or 33 kv Bus PT

at the Grid Substation66/33 kv Bus - I

66/33 kv Bus -I I

PTW for the

outage of this

66 or 33 kv PT

is taken


tags to be put on thesepoints of isolation for

the PT

11 kv Bus 440 v Bkr



Outage of 66 or 33 kv CT at

the Grid Substation66/33 kv Bus - I

66/33 kv Bus -I I

PTW for

the outage

of this 66

or 33 kv

CT istaken



the CT

11 kv Bus 440 v Bkr



Outage of (HT) 66 or 33 kv

Breaker Grid Substation66/33 kv Bus - I

66/33 kv Bus -I I

PTW for

the outage

of this 66

or 33 kvBreaker is

taken



the 66 or 33 kv Breaker

11 kv Bus 440 v Bkr



Outage of (LT) 11 kv

Breaker Grid Substation66/33 kv Bus - I

66/33 kv Bus -I I

PTW for the outage

of this 11

kv

Breaker is

taken



the 11 kv Breaker

11 kv Bus 440 v Bkr

O t f GOD / E th S it h



Outage of GOD / Earth Switch

/ Isolators66/33 kv Bus - I

66/33 kv Bus -I I

PTW for

the outage

of this

Isolator

(GOD)

taken



the Isolator (GOD) that is

taken out.

NOTE :- It should be

noted that all the

Isolators as pointed by

YELLOW arrow should be in OPEN condition &

that the Bus ± II should

be in de-energized state

11 kv Bus 440 v Bkr



Outage of (HT) 11 kv Bus

at the Grid Substation66/33 kv Bus - I

66/33 kv Bus -I I

PTW for the outage of this 11 kv Bus is taken

Do Not

Operate

(DOP) tags tobe put on

these points

of isolation

for the 11 kv

Bus

11 kv Bus 440 v Bkr

utage o v



Outgoing Feeder

Breaker at the Grid

Substation66/33 kv Bus - I

66/33 kv Bus -I I

PTW for the outage of this 11 kv Outgoing

Breaker Feeder is taken

Do Not Operate

(DOP) tags to beput on these

points of isolation

for the 11 kv

Outgoing Feeder

Breaker

11 kv Bus 440 v Bkr

Outage of 33 kv Capacitor



Outage of 33 kv Capacitor

Bank at the Grid

Substation66 kv Bus - I

66 kv Bus -I I

PTW for the

outage of

this 33 kv

Capacitor

Bank is taken

Do Not Operate

(DOP) tags to be

put on these

points of isolation

for the 33 kv

Capacitor Bank

33 kv Capacitor

Bank

33 kv Bus -I I

33 kv Bus -I

O t f (LT) 11 k C it



Outage of (LT) 11 kv Capacitor

Bank at the Grid Substation

66/33 kv Bus - I

66/33 kv Bus -I I

PTW for the outage of this 11 kv Capacitor Bank

is taken

Do Not Operate(DOP) tags to be

put on these

points of isolation

for the 11 kv

Capacitor

11 kv Bus 11 kv Capacitor

Bank

2. electrical safety practice

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