Nominal

System

Voltage

Phase

to

Ground

Phase

to

Phase

(mm )

6.6 1

16mm /

kV Um

20mm /

kV Um

Creepage Distance

(mm )

Recommended

no. of

Disc Insulator

Units

(minimum)( kV )

- 22

Withstand Voltage

Lightning

Impulse

Swtching

Impulse

Power

Frequency

-

-

-

28

50

70 726

116

194 242

33

75

95

150

200

11

22

Standard Insulation Levels and Clearance Distances

2

3

150 200

200 270

320 430

430 580

1

387

581

145

484

Crossarm

D - Shackles orAdaptor Plate -+/- 300mm.

Arcing Horn

Insulator StringConductor

Suspension Clamp

Phase Conductor

VibrationDamper

1 460mm

1022mm

730mm

584mm

44kV

66kV

88kV

132 kV

9001000

1100

1200Safe Work Clearances

3656

1256

1022

1320

844

2544

MEWP

( IAD )

1m

2m

3m

4m

5m

6m

7m

8m

9m

10m

11m

12m

13m

14m

MEWP( IAD )

ConventionalClimbing

Procedural

Applications

Technical

Directive

Suspension Insulators

Strain Insulators

MEWP ( IAD )

❶

PEDESTALMOUNTED LADDER

POLE MOUNTED PLATFORM

❹

EXTENTION LADDER

❺

❷

CLIMBING IRONS

❸

PROCEDURE FOR CHANGING INTERMEDIATE POLE TO STRAIN STRUCTURE FROM AN INSULATING AERIAL DEVICE

OVERHEADSWITCH

HIGH (HV)

MEDIUM (MHV)

C3M - LIVE WORK Maintenance

1m

2m

3m

4m

5m

6m

7m

8m

9m

10m

11m

12m

13m

14m

15m

16m

17m

18m

StrainInsulators

StaticBonding

Lead

Hand Line

Lineman

(10)

SINGLE

CONDUCTOR ADAPTORS

TWIN TRIPLE QUAD SLEEVE

LIVE YOKE

X

LIVE END

SLEEVE

XCONDUCTOR

HOOK

220kV(13)

X

275kV(16)

400Kv(23)

X

132kV(10)

SINGLE

"V" STRING - 132kV > 400kV

4 X 4 Boom

WireTong

STRUCTURE

YOKE

" Diamond " - Carona Cage

S W L

( Safe Working Load )

of

Strain Pole Assembly

3 500 kG

INSULATOR "i" & "V" STRINGS WITH 50mm STRAIN POLE

ASSEMBLY AND CONDUCTOR CONFIGURATIONS

EXTRA HIGH (EHV)

ConventionalClimbing

SuspensionInsulators

16m

17m

18m

19m

20m

21m

22m

23m

24m

25m

26m

27m

28m

29m

30m

Ju

mp

ers

❽③① ②❽ TR

AN

SM

ISS

ION

Su

spe

nsi

on

St

rain

Ju

mp

ers

D

amag

ed

Co

nd

uct

or

❸ ❹ ❸ ❺ ❻

Ea

rth

Wir

e D

amp

er

A

viat

ion

Sp

he

re

❼ ❼⑤ ⑥

A

viat

ion

Sp

he

re

Sp

ace

rs

❻ ⑦ ⑧④

Fu

ll T

en

sio

n

Ea

rth

Wir

e D

amp

er

❹❶ ❷

DIS

TR

IBU

TIO

N

❷

A B

③ ④ ⑤ ⑥ ⑧

D

amag

ed

Co

nd

uct

or

❺❶

Sp

ace

rs

Fu

ll T

en

sio

n

⑦

Su

spe

nsi

on

St

rain

① ②

LIVE WORK PROCEDURAL APPROACH

DISTRIBUTION - 44kV > 132kV MAIN TRANSMISSION SYSTEM - 132kV > 765kV

Insulators Line HardwareLine HardwareInsulators

" Hot Seat " Method

• Suspension Insulator Change

• Strain Insulator Change

LIVE LINE MAINTENANCE

• Replacing section of damaged conductor O/Ph.

• Replacing Spacers & Minor Repairs O/Ph.

• Earthwire Damper Replacement E/Wi.

Linesman

• Full Tension Repairs / Installation

• Earthwire Damper Replacement

• Aviation Sphere Installation

• Replacing Spacers & Minor Repairs

• Replacing section of damaged conductor

• Full Tension Repairs / Installation E/Wi.

• Aviation Sphere Installation E/Wi.

• Inspecting hardware,jumper connections & replacement of minor hardware

• Inspecting hardware,

jumper connections

& replacement of minor hardware

• Removing / replacing / installing an

earthwire vibration damper

• Centre phase conductor repairs

Linesman

•Removing / replacing /installing an earthwire

vibration damper•

Centre phaseconductor repairs

•

Tower to Tower

" Underslung " Method

Conventional

Climbing

Air Mobile

MEWP ( IAD )

" Bare Hand "

Rope & Cart

Method

❶

❶

❷

❸

❹

❺

LWT '98 - PHS/SS 07

LWT '98 - PHS/SS 07

DISTRIBUTION

DISTRIBUTION

DISTRIBUTION

DISTRIBUTION

DISTRIBUTION

" I " Suspension " V " Suspension

StrainSTRAIN &SUSPENSION

REMOVINGBUSBAR

JUMPERS

STRAININSULATOR

STRINGS

SUSPENSIONINSULATOR

STRINGS

BYPASSLINKS

ENERGY

ERA(C)SECTOR

ENERGY

ERA(C)SECTOR

ENERGY

ERA(C)SECTOR

ENERGY

ERA(C)SECTOR

ENERGY

ERA(C)SECTOR

TRANSMISSION

DISTRIBUTION

ENERGY

ERA(C)SECTOR

HOT STICK& BARE HAND

TECHNICAL PROCEDURES

MEWP ( IAD )

❶

HS&BHMHOT STICK & BARE HAND METHODS

DIRECTIVE

LIVE WORKSUBSTATIONS

PERSONNELPOSITIONING

& EQUIPMENT

❷

❸

❹

❺

❻

METALLINER

❶

Informative . . .

ENERGY

ERA(C)SECTOR

❶

TRANSMISSION

DISTRIBUTION

SPRAYWASHING

CONVENTIONAL

❷

TRANSMISSION

DISTRIBUTION

SPRAYWASHING

AIR MOBILE

Overhead Lines&

Substations

TO

OL

S

&

EQ

UIP

ME

NT

I

DE

NT

IFIC

AT

ION

B

Y

CL

ASS

IFIC

AT

ION

STR

UC

TU

RE

SO

verh

ead

L

ines

STRUCTURE

IDENTIFICATION( HV & EHV )

44kV - 400kV

DUAL CIRCUIT

❿

CAMEL NECK

❽

❾

248 TYPE - "III"

❼

5 - POLE

LIGHT DELTA

" KITE "

❶

H - POLE

❷ ❸

LATICE

❹ ❺

248 TYPE - "IVI"

❻

⓫

⓬ ⓭

DELTA - "VVV" DUAL CIRCUIT

DELTA - "VVV" CONCORD NOSE

⓮

GUYED ROPE

⓯

GUYED - "V"

⓰

STRAIN

❶ > ❺ ❻ > ⓰

MEWP ( IAD )

❷

QMSSTANDARD &

PROCEDURAL

REQUIREMENTS

DIRECTIVE

EXT. & HOOK LADDER

❹

LADDER ASSEMBLY

POSITIONING

& EQUIPMENTPERSONNEL

AIR MOBILE

❸

ROPE & CART

❻ ❼

CONVENTIONAL

❶

HS&BHMHOT STICK & BARE HAND METHODS

1Pager

ISO 9001 : 2008

⌂ ⌂ ⌂ " IMS " ⌂ ⌂ ⌂

Line

man

Jumper

⓭

CRADLE POLEASSEMBLY

⓫

INSULATING LADDERASSEMBLY

❾

HANDLINGEQUIPMENT

❺

MAINTENANCE

& REPAIR

TOOLS &

EQUIPMENT

SPECIFICATIONS By

CLASSIFICATION

TENSIONINGEQUIPMENT

❹

ELECTRICALPROTECTION

❷

ACCESSEQUIPMENT

❶

MECHANICALPROTECTION

❸

STRAIN & CRADLEPOLE ASSEMBLY

❼

SUPPORT POLES

& ACCESSORIES

❿

TROLLEY POLEASSEMBLY

TESTINSTRUMENTS

❻

UNIVERSAL TOOLS

⓬

⓯

STRAIN POLEATTACHMENTS

STRAIN POLEYOKES

⓮

⓲⓱

AIR MOBILE

ACCESSORIES

❽

INSULATING POLES

SHUNT &TOOL BOX

⓰

Hot Stick & Bare Hand Methods

ISO 9001 : 2015

CHAIN SAW &PETROL DRILL

FLEXIBLE COVERS

MECHANICALPROTECTION

❸

MEWP ( INSULATING

AERIAL DEVICE )

❶

ELECTRICALPROTECTION

❷

❹

RIGID COVERS

6"

❺

SHUNT

❻

HANDLINGEQUIPMENT

❼

Manual

Cord

less

Manual

Cord

less

CRIMPING &

CUTTING TOOLS

Cord

less

Cord

less

POWER TOOLS

MAINTENANCE& REPAIR

TESTINSTRUMENTS

SUPPORT POLES& ACCESSORIES

❿

⓬

⓬

GIN

❾

⓬

⓭ ⓮

TOOLS &

EQUIPMENT

SPECIFICATIONS By

CLASSIFICATION

CRANE TRUCK& Ext. LADDER

⓯

1Pager

ISO 9001 : 2008

⌂ ⌂ ⌂ " IMS " ⌂ ⌂ ⌂

⓫

INSULATING POLES

TENSIONINGEQUIPMENT

❽

TECHNICAL

PROCEDURES

( MHV )11kV - 33kV

MAIN LINEC

LOS

ING

SP

AN

CLOSING SPAN

❿

SWITCHES

❽

BIRDS / STAYS /TREES / B.I.L.

❾

LINKS

❼

HORISONTAL

STEEL "KITE"

VERTICAL STRAIN

❶

DELTA

❷ ❸

VERTICAL

❹ ❺

"WISHBONE"

❻

POLE CHANGE& CONVERSIONS

⓫

IGMINSULATING GLOVE METHOD

QMS

STANDARD &

PROCEDURAL

REQUIREMENTS

DIRECTIVE

ISO 9001 : 2015

. . . DIRECTIVES . . .

STRUCTURE

IDENTIFICATION