GE AV-Line Instruction Manual

GEH

2621

Instructions

Line

Switchboards

Installation

and

Maintenance

Elicit

EaGB

•

;

•

“

GENERAL

ELECTRIC

Courtesy of NationalSwitchgear.com

Table

Contents

PAGE

DESCRIPTION

LINE

Switchboard

Construction

Receiving

Handling

and

Storage

Installing

the

Bus

Stub

For

LVD

Stubs

For

Armor

Clad

Stubs

Short

Circuit

Cable

Bracing

MAIN

CABLE

Switchboards

utilizing

cord

for

Short

Circuit

Protection

Switchboards

utilizing

cord

for

Short

Circuit

Protection

LOAD

CABLE

Switchboards

utilizing

cord

for

Short

Circuit

Protection

Installing

the

Switchboard

Maintenance

)

Courtesy of NationalSwitchgear.com

Line

Switchboard

Construction

These

instructions

not

purport

cover

ail

tails

variations

equipment

nor

they

pro

vide

for

every

possible

contingency

met

connection

with

installation

operation

mainte

nance

Should

further

information

desired

should

particular

problems

arise

which

are

not

covered

sufficiently

for

the

purchaser

’

purpose

the

matter

should

referred

the

General

Electric

Company

051

tin

Spa

FIGURE

Typical

group

mounted

distribution

construction

FIGURE

Typical

individually

mounted

distribution

construction

Courtesy of NationalSwitchgear.com

Receiving

Handling

and

Storage

RECEIVING

MINIMUM

Before

leaving

the

factory

the

switchboard

given

final

spection

and

packed

workmen

experienced

the

proper

handling

and

packing

electrical

equipment

Upon

receipt

any

apparatus

immediate

inspection

should

made

for

any

damage

sustained

transit

damage

noted

indication

rough

handling

visible

claim

for

damage

should

filed

with

the

carrier

Information

damaged

parts

part

number

case

number

requisition

number

etc

should

accompany

the

claim

regard

claims

for

damaged

shipments

shortages

and

incor

rect

material

the

following

excerpt

from

the

Published

Supplemental

Terms

and

Conditions

Sale

for

products

the

Distribution

Equipment

Division

General

Electric

Company

“

Title

and

risk

loss

shall

pass

upon

delivery

the

products

the

carrier

the

point

and

invoices

shall

payable

with

out

deduction

for

losses

shipment

the

Purchaser

’

sponsibility

file

claims

with

the

carrier

for

loss

damage

transit

”

“

Claims

for

shortages

incorrect

material

must

made

writing

within

days

after

receipt

the

shipment

the

Pur

chaser

and

the

failure

give

the

Company

such

written

notice

within

the

day

period

shall

unqualified

acceptance

the

products

and

waiver

the

Purchaser

all

claims

for

short

ages

incorrect

material

”

HANDLING

FIGURE

Using

lifting

slings

spreader

Using

lifting

plates

angles

and

blocking

are

not

furnished

beams

which

are

furnished

with

equipment

Equipment

may

moved

into

position

means

construction

rollers

under

the

shipping

skids

Remove

all

outer

packaging

Lifting

crane

other

hoisting

methods

done

shown

Figures

and

remove

the

LINE

Switchboard

from

the

skids

after

taking

out

the

shipping

bolts

carefully

slide

the

equipment

that

the

rear

side

off

the

skids

resting

the

floor

(

see

Fig

)

Tit

the

entire

equipment

slightly

the

rear

release

the

skids

Caution

advised

sliding

and

tilting

this

equipment

due

its

height

and

weight

can

become

top

heavy

tilted

too

far

Slide

the

switchboard

into

place

pushing

the

frame

Blow

out

any

dust

loose

particles

packing

material

which

may

have

col

lected

the

device

parts

Remove

all

protective

blocking

relays

devices

breakers

with

equipment

LIFTING

INSTRUCTIONS

not

pass

cables

ropes

through

support

holes

Always

use

load

rated

shackles

safety

hooks

support

holes

Rig

that

legs

sling

(

Figs

and

)

are

less

than

from

horizontal

REMOVE

STORAGE

necessary

store

the

equipment

for

any

length

time

the

following

precautions

should

taken

prevent

corrosion

breakage

Uncrate

equipment

Store

clean

dry

rodent

free

area

moderate

tempera

ture

Cover

with

suitable

canvas

prevent

deposits

dirt

other

foreign

material

movable

parts

and

electrical

con

tact

surfaces

(

Heavy

duty

plastic

covers

are

recommended

)

stored

cool

damp

areas

heat

should

provided

keep

the

equipment

dry

outdoor

switchboards

this

may

accomplished

making

temporary

power

connection

the

heaters

installed

the

equipment

indoor

switch

boards

two

standard

120

volt

lamps

rated

100

watts

can

used

inside

each

vertical

section

REMOVE

FIGURE

Remove

lag

bolts

Slide

unit

off

skid

and

remove

skid

CAUTION

Remove

all

cartons

and

other

miscellaneous

pack

ing

material

from

inside

the

units

before

energizing

any

heaters

Courtesy of NationalSwitchgear.com

Installing

The

Bus

Stub

STUB

COVER

STUB

COVER

FLANGE

ADAPTER

REMOVABLE

FRAME

MEMBER

REMOVE

REAR

COVER

FIGURE

For

LVD

stubs

FIGURE

For

Armor

Clad

stubs

INSTALLATION

PROCEDURES

Slide

flange

adapters

together

slot

access

switchboard

bus

point

connection

busway

stub

limited

wall

other

obstruction

stub

must

installed

before

board

placed

final

location

)

Loosely

fasten

bus

stub

flange

stub

cover

with

hardware

furnished

with

stub

(

)

Bolt

stub

bus

switchboard

bus

(

see

Fig

)

(

)

Bolt

neutral

splice

bus

(

required

)

stub

neutral

with

hard

ware

furnished

with

the

neutral

splice

bus

(

)

After

stub

and

switchboard

bus

properly

aligned

and

bolted

tighten

down

flange

screws

Remove

shipping

screws

holding

bus

stub

flange

adapter

stub

cover

Slide

adapter

apart

allow

stub

enter

through

slot

cover

When

space

limited

the

top

rear

frame

mem

ber

may

removed

that

the

stub

with

stub

cover

may

installed

horizontally

instead

vertically

SWITCHBOARD

BUSBAR

BUS

STUB

FLAT

WASHER

BOLT

OPEN

SLOT

LOCK

WASHER

NOT

FILL

OPEN

SLOT

WITH

HARDWARE

FIGURE

For

Armor

Clad

stubs

Courtesy of NationalSwitchgear.com

WARNING

Short

Circuit

Cable

Bracing

Required

LOAD

CABLE

BRACING

MAIN

CABLE

BRACING

Load

cable

short

circuit

bracing

required

for

each

component

installed

switchboard

section

with

available

short

circuit

currents

000

rms

symmetrical

amperes

and

above

Main

cable

bracing

required

when

five

cables

per

phase

less

feed

switchboard

available

short

circuit

currents

100

000

and

150

000

rms

symmetrical

amperes

and

eight

cables

per

phase

less

available

short

circuit

current

200

000

rms

symmetrical

amperes

Assembly

purchasing

and

maintenance

instructions

for

main

cable

short

circuit

bracing

can

found

pages

and

Assembly

purchasing

and

maintenance

instructions

for

load

cable

short

circuit

bracing

can

found

page

Installing

The

Main

Cable

AND

SWITCHBOARDS

UTILIZING

CORD

FOR

SHORT

CIRCUIT

PROTECTION

PRIOR

INSTALLATION

minimum

making

revolutions

around

the

”

and

“

phase

main

cables

and

revolutions

around

the

“

and

“

”

phase

main

cables

Now

with

the

remaining

cord

wrap

the

main

cable

lashing

the

cable

braces

between

phases

with

revolu

tions

tieing

knot

the

cable

braces

you

complete

your

last

revolution

All

revolutions

should

made

tight

possible

prevent

whipping

during

short

circuits

Before

any

installation

work

performed

study

all

drawings

furnished

the

General

Electric

Company

for

the

particular

installation

These

include

arrangement

drawings

(

front

end

and

plan

view

)

connection

diagrams

and

schedule

equip

ment

Any

material

external

the

equipment

which

may

required

meet

any

local

codes

(

railings

etc

)

not

furnished

INSPECTION

AFTER

MAIN

CABLE

INSTALLATION

CABLE

BRACE

prevent

heating

there

should

closed

loop

steel

around

single

conductor

group

conductors

which

does

not

include

all

the

conductors

(

including

the

neutral

)

the

circuit

the

conductors

must

pass

through

separate

holes

piece

steel

slots

should

cut

between

the

holes

not

allow

cables

carrying

heavy

current

come

near

instruments

meters

this

may

affect

their

accuracy

Use

the

minimum

amount

cable

necessary

accomplish

the

connections

The

increased

resist

ance

longer

cables

generates

unnecessary

heat

Main

cable

lashing

should

checked

monthly

)

•

fol

[

MAIN

CABLE

TERMINALS

FIGURE

INSTALLATION

PROCEDURES

FOR

MAIN

CABLE

WITH

SHORT

CIRCUIT

PROTECTION

Align

conduit

holes

linear

orientation

directly

over

possible

the

braces

Consideration

should

given

installing

conduits

sleeves

which

might

required

for

future

connections

Run

and

bend

the

main

cable

most

convenient

orientation

making

sure

the

main

cable

has

been

located

directly

against

the

cable

braces

before

connects

the

main

cable

terminals

Lash

the

main

cable

according

Figure

above

using

polyester

braided

rope

having

tensile

strength

2000

lbs

)

Courtesy of NationalSwitchgear.com

Installing

The

Main

Cable

SWITCHBOARDS

UTILIZING

CORD

FOR

SHORT

CIRCUIT

PROTECTION

CABLE

BRACE

Cal

[

;

FIGURE

PRIOR

INSTALLATION

INSPECTION

AFTER

MAIN

CABLE

INSTALLATION

Before

any

installation

work

performed

study

all

drawings

furnished

the

General

Electric

Company

for

the

particular

installation

These

include

arrangement

drawings

(

front

end

and

plan

view

)

connection

diagrams

and

schedule

equip

ment

Any

material

external

the

equipment

which

may

required

meet

any

local

codes

(

railings

etc

)

not

furnished

prevent

heating

there

should

closed

loop

steel

around

single

conductor

group

conductors

which

does

not

include

all

the

conductors

(

including

the

neutral

)

the

circuit

the

conductors

must

pass

through

separate

holes

piece

steel

slots

should

cut

between

the

holes

not

allow

cables

carrying

heavy

current

come

near

instruments

meters

this

may

affect

their

accuracy

Use

the

minimum

amount

cable

necessary

accomplish

the

connections

The

increased

resis

tance

longer

cables

generates

unneccessary

heat

Main

ble

lashing

should

checked

monthly

INSTALLATION

PROCEDURES

FOR

MAIN

CABLE

WITH

SHORT

CIRCUIT

PROTECTION

Align

conduit

holes

linear

orientation

distance

equal

the

radius

bend

the

cable

Consideration

should

given

stalling

conduits

sleeves

which

might

required

for

future

connections

(

see

Figure

)

Run

and

bend

the

main

cable

most

convenient

orientation

making

sure

the

main

cable

has

been

located

directly

against

cable

braces

before

connects

the

main

cable

terminals

(

see

Figure

)

Lash

the

main

cable

according

Figure

above

using

polyester

braided

rope

having

atensile

strength

2000

lbs

minimum

making

revolu

tions

around

the

“

”

and

“

”

phase

main

cables

and

revolu

tions

around

the

“

”

and

“

”

phase

main

cables

Now

with

the

remaining

cord

wrap

the

main

cable

lashing

the

cable

brace

between

phases

with

revolutions

and

tie

knot

the

cable

brace

you

complete

your

last

revolution

All

revolutions

should

made

tight

possible

prevent

whipping

during

short

circuits

Courtesy of NationalSwitchgear.com

Installing

The

Load

Cable

•

AND

SWITCHBOARDS

UTILIZING

CORD

FOR

SHORT

CIRCUIT

PROTECTION

•

CABLE

BRACE

(

FIGURE

INSPECTION

AFTER

LOAD

CABLE

INSTALLATION

PRIOR

INSTALLATION

Before

any

installation

work

performed

study

all

drawings

furnished

the

General

Electric

Company

for

the

particular

installation

These

include

arrangement

drawings

(

front

end

and

plan

view

)

connection

diagrams

and

schedule

equip

ment

Any

material

external

the

equipment

which

may

required

meet

any

local

codes

(

railings

etc

)

not

furnished

prevent

heating

there

should

closed

loop

steel

around

single

conductor

group

conductors

which

does

not

include

all

the

conductors

(

including

the

neutral

)

the

circuit

the

conductors

must

pass

through

separate

holes

piece

steel

slots

should

cut

between

the

holes

not

allow

cables

carrying

heavy

current

come

near

instruments

meters

this

may

affect

their

accuracy

Use

the

minimum

amount

cable

necessary

accomplish

the

connections

The

increased

resis

tance

longer

cables

generates

unnecessary

heat

Load

cable

lashing

should

checked

monthly

INSTALLATION

PROCEDURES

FOR

LOAD

CABLE

WITH

SHORT

CIRCUIT

PROTECTION

Locate

the

load

cable

braces

which

can

found

every

the

back

the

switchboard

Run

and

bend

the

load

cable

the

most

convenient

manner

making

sure

that

the

load

cable

against

the

load

cable

brace

closest

the

component

’

load

terminals

(

see

Figure

)

and

every

load

cable

brace

above

below

depending

the

load

cable

will

exit

the

switchboard

top

bottom

(

see

Figure

)

After

running

the

load

cable

against

the

load

cable

braces

and

using

polyester

braided

rope

having

tensile

strength

2000

lbs

minimum

lash

the

load

cable

the

load

cable

brace

making

revolutions

around

the

cable

and

the

brace

Tie

knot

the

cable

brace

after

completion

the

last

revolution

All

revolutions

should

made

tight

possible

prevent

whipping

during

short

circuits

Courtesy of NationalSwitchgear.com

Installing

The

Line

Switchboard

PRIOR

INSTALLATION

Before

any

installation

work

performed

study

all

drawings

furnished

the

General

Electric

Company

for

the

particular

installation

These

include

arrangement

drawings

(

front

end

and

plan

view

)

connection

diagrams

and

schedule

equip

ment

Any

material

external

the

equipment

which

may

required

meet

any

local

codes

(

mats

screens

railings

etc

)

not

furnished

LOCATION

locating

the

switchboard

consideration

should

given

the

aisle

space

required

The

space

the

front

must

sufficient

permit

the

opening

doors

and

the

insertion

and

withdrawal

removable

breakers

The

space

the

rear

must

sufficient

for

opening

doors

well

the

cables

inspection

and

mainte

nance

Check

local

codes

for

special

aisle

space

requirements

FIGURE

Bolting

the

switchboard

directly

the

floor

—

indoor

construction

FRONT

FOUNDATION

REQUIREMENTS

Indoor

Equipment

—

The

floor

foundation

must

strong

enough

prevent

sagging

from

the

weight

the

switchboard

structure

the

foundation

subject

vibrations

special

mounting

must

provided

prevent

the

transmittal

vibra

tions

the

equipment

Because

its

high

structural

strength

the

LINE

Switchboard

may

bolted

directly

the

floor

(

see

Fig

)

The

floor

must

entirely

level

without

any

high

spots

which

might

cause

misalign

ment

the

floor

not

level

recommended

that

floor

channels

used

The

steel

floor

channels

when

used

should

embedded

level

concrete

slab

with

the

top

surface

the

channels

flush

with

the

finished

floor

avoid

distortion

the

structure

essen

tial

that

the

steel

channels

level

and

aligned

with

each

other

prior

the

final

anchoring

The

recommended

foundation

con

struction

and

method

mounting

the

switchboard

the

founda

tion

shown

Fig

Channels

should

grouted

after

installation

FIGURE

Switchboard

mounted

floor

channels

—

indoor

construction

FRONT

Outdoor

Equipment

—

Outdoor

equipment

usually

installed

concrete

pad

with

level

and

smooth

surface

Channel

sills

are

supplied

with

the

switchboard

two

with

the

non

walk

type

and

three

for

the

walk

type

shown

Figs

and

Channels

should

set

the

pad

and

filled

with

grout

Conduits

—

the

time

the

foundation

channels

are

being

stalled

any

conduits

sleeves

required

for

power

and

control

cables

that

are

enter

the

equipment

from

underneath

should

located

and

installed

within

the

available

space

shown

the

floor

plan

drawings

Consideration

should

given

installing

conduits

sleeves

which

might

required

for

future

connec

tions

Conduit

stubs

should

extend

above

the

floor

just

enough

prevent

the

entrance

water

Consideration

should

given

the

location

components

the

switchboard

and

space

should

allowed

for

swinging

cables

after

they

leave

the

conduit

The

lowest

live

metal

part

the

switchboard

will

approximately

minimum

above

the

bottom

the

switchboard

(

not

including

floor

sills

)

should

noted

that

the

switchboard

must

lifted

over

the

conduit

stubs

The

conduits

should

terminate

the

switchboard

with

the

appropriate

conduit

connectors

Conduits

may

require

grounding

electrical

connection

the

switch

board

enclosure

FIGURE

Non

walk

type

switchboard

—

outdoor

construction

FRONT

FIGURE

Walk

type

switchboard

—

outdoor

construction

Courtesy of NationalSwitchgear.com

Installing

The

Line

Switchboard

PHASE

WIRE

SUPPLY

SERVICE

ENTRANCE

MAIN

BREAKER

))

)

FIELD

CONNECTIONS

AND

TESTING

GROUND

FAULT

PROTECTION

SYSTEMS

(

)

the

service

entrance

section

the

neutral

conductor

shall

bonded

the

switchboard

ground

bus

“

main

bonding

jumper

”

(

ground

strap

)

(

NEC

250

;

891

Para

23.8

and

23.12

)

This

grounding

point

the

neutral

conductor

shall

located

the

supply

side

any

ground

fault

sensors

volving

the

neutral

conductor

(

891

Para

15.4

and

15.5

)

Grounding

connections

shall

not

made

the

neutral

con

ductor

the

load

side

the

service

disconnecting

means

(

NEC

250

;

891

Para

15.4

)

(

)

load

feeders

run

all

phase

conductors

(

and

neutral

used

)

through

the

sensor

window

(

)

with

all

the

same

direction

with

respect

sensor

polarity

(

)

not

run

equipment

ground

conductors

through

ground

fault

sensors

Connect

them

directly

the

switchboard

ground

bus

(

not

the

neutral

bus

)

(

891

Para

38.39

)

(

)

Connect

the

service

grounding

electrode

(

water

pipe

etc

)

the

lug

provided

the

switchboard

ground

bus

for

this

pur

pose

(

NEC

250

;

891

Para

23.6

)

(

)

Whenever

service

derived

from

grounded

neutral

sup

ply

the

grounded

neutral

conductor

must

brought

into

the

service

entrance

equipment

even

the

grounded

conductor

not

needed

for

the

load

supplied

the

service

(

NEC

250

)

This

required

provide

low

impedance

ground

fault

current

return

path

the

neutral

assure

operation

the

overcurrent

device

for

safety

personnel

and

property

(

)

Refer

GEI

48907

for

instructions

for

conducting

perfor

mance

tests

new

installations

ground

fault

protection

systems

required

NEC

230

(

)

WIRE

IGF

NEUTRAL

aus

;

)

FDR

IGF

INTEGRAL

GROUND

FAULT

PROTECTION

WIRE

IGF

GHD

PHASE

—

WIRELOAD

PHASE

—

WIRE

LOAD

TYPICAL

SINGLE

SOURCE

GROUND

FAULT

PROTECTION

USING

INTEGRAL

GROUND

FAULT

TRIPS

FIGURE

FUSE

SELECTION

The

proper

fuses

for

each

circuit

should

selected

based

load

characteristics

(

see

Ambient

Temperatures

and

Circuit

)

and

available

short

circuit

current

the

line

terminals

the

switchboard

Select

fuse

for

which

the

rating

the

combination

fuse

and

switch

equals

exceeds

the

available

short

circuit

current

Removable

link

type

fuses

are

not

recommended

TESTING

AND

INSPECTION

After

the

equipment

has

been

installed

and

all

connections

made

should

tested

and

inspected

BEFORE

ENERGIZING

Although

the

equipment

and

devices

have

been

inspected

the

factory

final

field

test

should

made

certain

that

the

equipment

has

been

properly

installed

and

that

all

connections

are

correct

and

have

not

become

loose

transportation

recommended

that

the

switchboard

completely

wire

checked

and

all

bolts

and

terminals

double

checked

for

tightness

Check

all

Kirk

key

interlocking

schemes

insure

desired

performance

The

incoming

line

should

completely

energized

while

the

tests

are

progress

addition

these

mechanical

checks

the

switchboard

should

meggered

Meggering

should

performed

with

all

switchboard

devices

the

open

position

and

all

instrumentation

and

control

fuses

removed

megger

(

megohmmeter

)

developing

500

volts

should

used

guide

switchboards

tested

when

leaving

the

factory

have

shown

typical

minimum

values

100

megohms

Any

switchboards

job

tested

under

the

above

conditions

showing

values

considerably

below

this

should

inspected

for

possible

tracking

insulation

breakdown

All

scraps

wire

plaster

dust

and

other

foreign

material

must

removed

Vacuum

cleaning

the

recommended

method

removal

After

thorough

cleaning

and

inspection

the

megger

reading

still

low

may

still

safe

energize

the

equipment

When

restoring

flooded

wet

equipment

service

for

example

accepted

maintenance

prac

tice

require

minimum

one

megohm

before

energizing

Under

damp

humid

conditions

considered

good

practice

operate

the

equipment

lower

than

rated

voltage

for

short

time

possible

improve

the

low

megger

reading

Instructions

for

inspection

and

testing

low

voltage

power

circuit

breakers

are

given

the

applicable

individual

instruction

book

Direc

tions

for

testing

devices

such

relays

instruments

and

meters

are

given

the

instruction

book

furnished

for

each

device

Protective

relays

must

coordinated

with

other

relays

the

system

therefore

these

relays

are

set

the

purchaser

General

instructions

setting

the

relays

are

given

the

relay

instruction

books

PHASE

WIRE

SUPPLY

ALTERNATE

SENSOR

ARRANGEMENTS

ALTERNATE

SENSORS

FOR

MAIN

BREAKER

GFP

ZERO

SEQUENCE

GROUND

RETURN

SENSOR

)

SERVICE

ENTRANCE

MAIN

BREAKER

GFR

(

ZERO

SEQUENCE

RESIDUAL

SENSOR

RESIDUAL

NEUTRAL

BUS

(

XXX

RESIDUAL

Epl

)

))

GFR

GROUND

FAULT

RELAY

FDR

GFR

FDR

GRD

sus

©©

PHASE

—

WIRE

LQAD

PHASE

—

WIRE

LOAD

TYPICAL

SINGLE

SOURCE

GROUND

FAULT

PROTECTION

USING

GROUND

FAULT

RELAYS

FIGURE

Courtesy of NationalSwitchgear.com

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