GE AKR-30S User manual

GEH

5019

Power

Circuit

Breakers

Installation

and

Maintenance

Instructions

Types

AKR

and

AKRU

GENERAL

ELECTRIC

Courtesy of NationalSwitchgear.com

CONTENTS

Description

Page

Description

Page

SECTION

—

Electrical

Replacement

Control

Components

SECTION

—

Receiving

Handling

and

Storage

Closing

Solenoid

Coil

Replacement

“

”

Relay

“

”

Relay

Replacement

Cut

off

Switch

SECTION

—

Installation

Location

Stationary

Breakers

(

Code

)

Draw

Out

Breakers

(

Code

)

Breaker

Insertion

Breaker

Removal

Replacement

Closing

Switch

Replacement

Shunt

Trip

Device

Replacement

Adjustment

SECTION

—

Operation

Electrical

Operation

Manual

Operation

Connections

Control

Connections

SECTION

—

Protective

Devices

Undervoltage

Device

Adjustment

Static

Time

Delay

Undervoltage

Electric

Lockout

Device

Bell

Alarm

Switch

and

Lockout

Attachments

Operation

Open

Fuse

Lockout

Device

(

OFLO

)

Operation

Adjustments

Replacement

Draw

Out

Interlocks

SECTION

—

Maintenance

Inspection

Separation

Front

and

Back

Frame

Lubrication

Troubleshooting

SECTION

—

Basic

Breaker

Components

Disconnects

Primary

Disconnects

Secondary

Disconnects

Replacement

Movable

Secondary

Disconnects

SECTION

—

MicroVersaTrip

Trip

Device

Programmer

Unit

Fault

Trip

Indicators

Remote

Fault

Indication

Arc

Quencher

Replacement

Breaker

Contact

Structure

Contact

Adjustments

Contact

Replacement

General

Preparation

Removal

Movable

Contacts

Removal

Stationary

Contacts

Replacement

Stationary

Contacts

Replacement

Movable

Contacts

Contact

Springs

Mechanism

Adjustment

Latch

Adjustment

Mechanism

Replacement

Removal

Front

Escutcheon

MicroVersaTrip

Installation

Current

Sensors

Replacement

Flux

Shift

Trip

Device

Troubleshooting

Resistance

Values

False

Tripping

—

Breakers

Equipped

with

Ground

Fault

SECTION

—

Electrical

Characteristics

SECTION

—

Renewal

Parts

Manual

Breakers

Auxiliary

Switch

Replacement

1984

General

Electric

Company

Courtesy of NationalSwitchgear.com

NOTE

Before

installing

operating

these

circuit

breakers

carefully

read

Sections

and

SECTION

—

Receiving

Handling

and

Storage

the

packaging

material

Blow

out

any

dirt

loose

particles

packaging

material

remaining

the

breaker

the

circuit

breaker

not

placed

service

once

store

clean

dry

location

upright

position

Support

prevent

bending

the

studs

damage

any

the

breaker

parts

not

cover

the

breaker

with

packing

other

material

which

absorbs

moisture

that

may

cause

corrosion

breaker

parts

covering

kraft

other

non

absorbent

paper

will

prevent

dust

from

settling

the

breaker

Upon

receipt

circuit

breaker

immediately

examine

for

any

damage

loss

sustained

shipment

injury

loss

rough

handling

evident

file

damage

claim

once

with

the

transportation

company

and

notify

the

nearest

General

Electric

Sales

Office

Unpack

the

circuit

breaker

soon

possible

after

has

been

received

Exercise

care

unpacking

avoid

damage

the

breaker

parts

sure

that

loose

parts

are

missing

left

SECTION

Installation

Location

The

outline

drawings

Table

provide

basic

dimensional

information

for

designing

the

panel

enclosure

mounting

choosing

location

for

the

installation

these

breakers

there

are

two

factors

considered

The

first

the

location

’

environmental

impact

the

breaker

Better

performance

and

longer

life

can

expected

the

area

clean

dry

dust

free

and

well

ventilated

The

second

convenience

for

operation

and

maintenance

The

breaker

should

easily

accessible

the

operator

and

there

should

sufficient

space

available

for

maintenance

work

Table

—

Outline

Drawings

Outline

Dwg

Breaker

Type

AKR

Draw

Out

AKRU

Draw

Out

AKR

Stationary

139

5317

139

5318

139

5319

Stationary

Breakers

(

Code

)

These

breakers

are

designed

for

mounting

switchboard

enclosure

designed

and

constructed

others

Mounting

consists

bolting

the

breaker

frame

supporting

structure

within

the

switchboard

enclosure

connecting

the

power

buses

cables

and

making

any

necessary

control

connections

The

front

cover

the

breaker

enclosure

may

hinged

door

plate

bolted

the

panel

including

cutout

opening

through

which

the

front

escutcheon

the

breaker

can

protrude

The

surface

which

the

breaker

mounted

must

flat

avoid

internal

distortion

the

breaker

The

supporting

structure

must

rigid

enough

avoid

any

possibility

the

breaker

studs

supporting

the

weight

the

breaker

Minimum

cutout

dimensions

given

the

appropriate

outline

drawing

must

maintained

provide

adequate

electrical

clearance

Connecting

bus

and

cables

must

rigidly

supported

prevent

undue

stress

the

breaker

terminals

Draw

Out

Breakers

—

Code

AKD

Switchgear

and

Substructure

The

draw

out

breaker

supported

two

protruding

pins

each

side

its

frame

;

these

pins

engage

slots

telescoping

slide

rails

(

tracks

)

mounted

each

sidewall

the

switchgear

All

draw

out

breakers

are

equipped

with

deep

escutcheon

with

side

labels

showing

these

discrete

positions

CONNECTED

—

This

the

breaker

’

“

service

”

position

fully

inserted

its

compartment

;

the

primary

and

secondary

disconnect

contacts

are

fully

engaged

The

breaker

must

tripped

before

can

racked

into

out

this

position

TEST

—

this

position

the

primary

contacts

are

disconnected

but

secondary

contacts

remain

engaged

This

allows

complete

breaker

operation

without

energizing

the

primary

circuit

Courtesy of NationalSwitchgear.com

Power

Circuit

Breakers

SECTION

—

Installation

DISCONNECTED

—

Both

primary

and

secondary

contacts

are

disengaged

WITHDRAWN

—

With

the

compartment

door

open

the

breaker

can

manually

pulled

out

the

WITHDRAWN

position

this

point

the

tracks

are

fully

extended

and

the

breaker

completely

out

its

compartment

ready

for

removal

Note

that

the

racking

mechanism

not

employed

for

movement

the

breaker

between

the

DISCONNECTED

and

WITHDRAWN

positions

Using

the

lifting

wire

provided

raise

the

breaker

above

the

elevation

the

tracks

Slowly

lower

and

guide

the

breaker

that

the

breaker

mounting

pins

drop

into

the

slots

the

tracks

Remove

the

lifting

wire

Push

the

breaker

into

the

compartment

until

reaches

the

stops

This

the

DISCONNECT

position

this

point

the

racking

arms

are

positioned

engage

the

fixed

racking

pins

the

compartment

ready

begin

the

racking

motion

Push

the

inner

rails

and

the

compartment

door

Insert

the

racking

handle

into

the

racking

screw

opening

the

compartment

door

clockwise

rotation

the

handle

move

the

breaker

through

the

TEST

position

into

the

CONNECTED

position

;

the

latter

indicated

when

the

jackscrew

comes

solid

stop

Breaker

Insertion

Prior

lifting

breaker

its

intended

compartment

location

observe

the

following

precautions

Breaker

Removal

With

the

door

closed

and

latched

trip

the

breaker

Insert

the

racking

handle

and

rotate

counterclockwise

until

the

breaker

travels

from

CONNECTED

through

TEST

the

DISCONNECTED

position

indicated

the

jackscrew

coming

solid

stop

This

operation

should

performed

with

the

door

closed

Open

the

compartment

door

and

pull

inner

rails

the

extended

position

Pull

the

breaker

out

the

travel

limit

—

this

the

WITHDRAWN

position

Attach

the

lifting

wire

and

hoist

the

breaker

until

its

mounting

pins

clear

the

track

slots

Swing

the

breaker

forward

until

the

primary

disconnects

clear

the

compartment

and

lower

the

breaker

onto

flat

surface

free

protrusions

that

could

damage

the

breaker

’

internal

parts

PRECAUTIONS

Check

the

compartment

ensure

that

free

foreign

objects

Verify

that

the

breaker

the

correct

type

for

that

compartment

Ensure

that

the

breaker

OPEN

Apply

thin

fresh

coat

lubricant

the

breaker

’

primary

disconnects

Ensure

that

the

racking

cams

the

breaker

are

correctly

positioned

for

initial

engagement

with

the

pins

the

compartment

this

insert

the

racking

handle

and

rotate

fully

counter

clockwise

Courtesy of NationalSwitchgear.com

Operation

SECTION

would

ensue

one

the

automatic

trip

devices

were

activated

the

time

closing

The

“

”

relay

together

with

the

cutoff

switch

provides

the

anti

pump

feature

The

mechanical

action

closing

operates

the

cutoff

switch

reversing

the

position

the

contacts

from

that

shown

the

diagram

This

energizes

the

“

”

relay

contact

still

maintained

the

closing

switch

with

the

result

that

the

“

”

relay

circuit

opened

“

”

contacts

This

prevents

the

“

”

relay

from

again

becoming

energized

“

”

contact

seals

the

“

”

coil

long

contact

maintained

the

closing

switch

Electrically

operated

breakers

may

also

closed

means

the

maintenance

handle

which

furnished

with

the

breaker

This

separate

tool

and

simply

lever

which

permits

operator

push

upwards

the

closing

solenoid

armature

Two

small

hooks

one

end

maintenance

handle

are

engaged

slots

(

)

Fig

located

the

lower

portion

the

front

escutcheon

(

)

Rotation

the

long

end

the

handle

downwards

forces

the

shorter

end

the

handle

upwards

against

the

bottom

the

solenoid

armature

and

closes

the

breaker

Electrical

Operation

(

See

Fig

)

The

electrically

operated

breaker

closes

whenever

the

closing

solenoid

coil

energized

This

causes

upward

movement

the

solenoid

armature

which

initiates

the

mechanical

closing

action

The

closing

signal

may

given

either

remote

switch

relay

closing

button

the

front

escutcheon

the

breaker

equipped

Either

action

(

refer

the

elementary

the

wiring

diagram

)

energizes

the

coil

the

“

”

relay

through

the

normally

closed

contacts

cutoff

switch

and

the

normally

closed

contacts

the

“

”

relay

When

the

“

”

relay

contactor

energized

closes

its

contacts

One

these

(

“

”

)

seals

the

“

”

coil

The

other

three

sets

contacts

which

are

arranged

series

activate

the

closing

solenoid

The

breaker

control

scheme

has

anti

pump

feature

which

allows

only

one

closure

the

breaker

for

single

operation

the

closing

switch

matter

how

long

the

switch

may

held

closed

This

prevents

the

repeated

operations

that

)

REMOTE

(

)

FUSE

STANDARD

LIST

ABBREVIATIONS

(

SOME

DEVICES

MAY

NOT

INCLUDED

DIAGRAMS

)

TRIP

—

SECONDARY

DISCONNECT

LOCATED

TOP

LEFT

FRONT

VIEW

—

SECONDARY

DISCONNECT

LOCATED

TOP

CEN

TER

FRONT

VIEW

—

SECONDARY

DISCONNECT

LOCATED

TOP

RIGHT

FRONT

VIEW

CLOSING

SOLENOID

ANTI

PUMP

RELAY

—

CUT

OFF

SWITCH

—

CLOSING

RELAY

—

(

AUXILIARY

SWITCH

)

“

”

CONTACTS

TAKE

POSI

TION

BREAKER

CONTACTS

“

”

CONTACTS

OPPOSITE

BREAKER

CONTACTS

—

SHUNT

TRIP

DEVICE

—

PUSH

BUTTON

CLOSING

SWITCH

BREAKER

•

AUX

(

FUSE

(

)

(

)

(

)

(

)

Fig

Typical

wiring

diagram

—

electric

operation

Courtesy of NationalSwitchgear.com

Power

Circuit

Breakers

SECTION

—

Operation

Connections

The

breaker

may

tripped

open

any

one

number

electrical

tripping

devices

which

will

described

detail

later

these

instructions

individual

breaker

may

have

none

any

combination

these

devices

They

are

the

overcurrent

tripping

device

shunt

tripping

device

undervoltage

tripping

device

and

open

fuse

lockout

device

All

them

affect

tripping

displacing

the

trip

latch

the

mechanism

The

trip

latch

rigidly

attached

trip

shaft

which

runs

through

the

breaker

from

left

right

Whenever

the

trip

shaft

rotated

counterclockwise

direction

looking

from

the

right

the

latch

displaced

The

tripping

devices

are

all

equipped

with

strikers

trip

arms

which

act

against

trip

paddles

rigidly

fastened

the

trip

shaft

causing

rotate

its

bearings

direction

trip

the

breaker

The

shunt

trip

device

has

set

auxiliary

switch

“

”

contacts

its

curcuit

(

“

”

contact

open

when

the

breaker

contacts

are

open

)

This

prevents

its

operation

unless

the

breaker

closed

The

undervoltage

device

coil

normally

continually

energized

When

the

control

voltage

low

non

existent

when

the

breaker

has

been

drawn

out

for

inspection

maintenance

the

breaker

rendered

trip

free

the

undervoltage

device

desired

the

breaker

the

device

armature

must

tied

down

blocked

closed

against

the

magnet

The

open

fuse

lockout

device

used

all

AKRU

(

fused

)

breakers

The

purpose

this

device

trip

the

breaker

upon

the

blowing

any

one

the

breaker

fuses

all

electrical

connections

good

joint

conductivity

must

When

making

power

connections

stationary

breakers

the

mating

joint

surfaces

must

clean

and

have

smooth

finish

They

should

parallel

and

firmly

bolted

clamped

together

addition

the

bus

cable

conductors

must

have

ample

ampacity

prevent

overheating

Control

Connections

The

equipment

connections

breaker

’

accessories

and

control

devices

must

accordance

with

the

specific

wiring

diagram

applicable

that

breaker

Control

connections

stationary

breakers

are

made

terminal

board

mounted

the

breaker

Figure

shows

typical

closing

and

tripping

connections

equipped

with

overcurrent

trip

device

which

includes

ground

fault

element

for

use

wire

circuits

additional

terminal

board

provided

the

breaker

for

connecting

the

equipment

mounted

neutral

sensor

(

physically

located

the

neutral

conductor

)

draw

out

breakers

the

control

circuits

terminate

the

breaker

compartment

the

stationary

portion

separable

secondary

disconnects

See

Fig

TERMINAL

BOARD

MOUNTED

RIGHT

SIDE

BREAKER

CUSTOMER

CONNECTIONS

Manual

Operation

The

manually

operated

breaker

closed

first

rotating

the

handle

counterclockwise

direction

through

degrees

then

rotating

clockwise

back

its

normal

vertical

position

The

counterclockwise

stroke

resets

the

mechanism

readying

for

the

clockwise

closing

stroke

The

breaker

may

tripped

manually

pushing

the

manual

trip

button

This

action

pushes

rod

against

trip

paddle

the

trip

shaft

rotating

and

causing

the

mechanism

trip

latch

displaced

This

allows

the

mechanism

linkage

collapse

through

the

action

the

mechanism

operating

springs

CLOSING

SOURCE

FUSE

TRIP

SOURCE

CAUTION

THE

BREAKER

TRIPPED

MANUALLY

WHILE

THE

OPERATING

HANDLE

THE

RESET

POSITION

THE

HANDLE

SHOULD

LOWERED

THE

RIGHT

HAND

WHILE

OPERATING

THE

TRIP

BUTTON

WITH

THE

LEFT

HAND

TRIP

SOURCE

1 0

Fig

Control

connections

stationary

breakers

—

front

view

Courtesy of NationalSwitchgear.com

Operation

SECTION

(

)

CONTROL

SOURCE

TRIP

FUSE

SOURCE

—

(

)

(

)

TRIP

SOLENOID

(

)

SOURCE

H r

AAAAAAA

J l

STATIONARY

SECONDARY

DISCONNECT

BLOCKS

LOCATED

TOP

COMPARTMENT

—

POSITIONS

AND

FURNISHED

ONLY

WHEN

REQUIRED

Fig

Control

connections

draw

out

breakers

—

front

view

breaker

compartment

Courtesy of NationalSwitchgear.com

Power

Circuit

Breakers

SECTION

—

Maintenance

Inspection

Remove

the

arc

quenchers

(

see

“

Arc

Quenchers

”

Section

)

Disconnect

the

two

insulated

connecting

links

(

)

Fig

between

the

mechanism

and

the

crossbar

(

)

removing

the

tie

bolt

(

)

and

slipping

the

ends

the

links

off

the

ends

the

shouldered

the

mechanism

Removal

the

two

top

flux

shifter

support

screws

will

permit

disengagement

the

reset

activator

CAUTION

BEFORE

INSPECTION

ANY

MAINTENANCE

WORK

DONE

SURE

THAT

THE

BREAKER

THE

OPEN

POSITION

ALL

ELECTRICAL

POWER

BOTH

PRIMARY

AND

CONTROL

SOURCES

SHOULD

ALSO

DISCONNECTED

the

breaker

draw

out

type

with

secondary

disconnects

remove

the

secondary

disconnect

supporting

bracket

from

the

breaker

back

frame

Also

remove

any

wiring

bundle

retainers

that

may

attached

the

back

frame

Remove

the

rear

elastic

stop

nut

from

each

two

studs

(

)

which

tie

the

upper

ends

the

mechanism

frame

the

back

frame

the

breaker

Remove

two

side

support

standoff

bolts

attached

back

frame

Remove

two

bolts

(

Hex

)

supporting

the

programmer

mounting

bracket

Disconnect

programmer

harness

current

sensor

terminal

boards

Note

polarity

and

tap

setting

(

where

applicable

)

Remove

the

two

elastic

stop

nuts

(

Hex

)

which

fasten

the

wraparound

portion

the

front

frame

the

back

frame

One

these

located

each

side

the

breaker

about

the

distance

down

from

the

top

edge

the

back

frame

The

two

frames

are

now

disconnected

Periodic

inspection

the

circuit

breaker

recommended

least

once

year

frequent

inspections

are

recom

mended

severe

load

conditions

dust

moisture

other

unfavorable

conditions

exist

the

breaker

remains

open

closed

for

long

period

time

recommended

that

arrangements

made

open

and

several

times

succession

preferably

under

load

all

times

important

not

permit

pencil

lines

paint

oil

other

foreign

materials

remain

the

insulating

surfaces

the

breaker

they

may

cause

low

resistance

between

points

different

potential

and

result

eventual

electrical

breakdown

Always

inspect

the

breaker

after

short

circuit

has

been

interrupted

the

time

periodic

inspection

the

following

checks

should

made

after

the

breaker

has

been

energized

Manually

operate

the

breaker

several

times

checking

for

obstructions

excessive

friction

Electrically

operate

the

breaker

several

times

(

breaker

has

electrical

control

)

ascertain

whether

the

electrical

attachments

are

functioning

properly

Remove

and

inspect

the

arc

quencher

Breakage

parts

extensive

burning

will

indicate

need

for

replacement

Check

contact

condition

and

depression

Check

latch

engagement

Check

operation

tripping

devices

including

overcurrent

trip

devices

making

sure

all

have

positive

tripping

action

(

discernible

movement

tripping

direction

beyond

point

tripping

)

(

For

detailed

information

breaker

features

listed

refer

appropriate

sections

these

instructions

)

CAUTION

CARE

SHOULD

EXERCISED

SEPARATING

THEM

AVOID

DAMAGE

THE

TRIP

SHAFT

ARMS

AND

PADDLES

While

the

back

frame

held

steady

lift

the

front

frame

and

mechanism

and

out

Reassembly

the

two

breaker

halves

accomplished

following

the

procedure

outlined

reverse

order

Lubrication

general

the

circuit

breaker

requires

very

little

lubrication

Bearing

points

and

sliding

surfaces

should

lubricated

very

lightly

the

regular

inspection

periods

with

thin

film

lubricant

(

Mobil

)

Hardened

grease

and

dirt

should

removed

from

latch

and

bearing

surfaces

the

use

safe

cleaning

solvent

such

kerosene

Latch

surfaces

should

left

clean

and

dry

and

not

lubricated

Separation

Front

and

Back

Frames

(

See

Fig

)

Many

maintenance

operations

will

either

require

greatly

facilitated

separating

the

front

frame

and

mechanism

the

breaker

from

the

back

frame

base

which

consists

the

current

carrying

parts

and

their

supporting

structure

The

procedure

for

this

operation

follows

NOTE

All

excess

lubricant

should

removed

with

clean

cloth

order

avoid

any

accumulation

dirt

dust

each

maintenance

period

all

silver

friction

points

such

primary

disconnects

should

cleaned

and

given

fresh

coat

lubricant

Courtesy of NationalSwitchgear.com

Maintenance

SECTION

Troubleshooting

The

following

table

lists

several

possible

symptoms

breaker

malfunction

together

with

their

causes

and

remedies

any

time

these

symptoms

are

observed

their

cause

should

determined

and

the

necessary

corrective

action

should

taken

Remedy

Cause

Trouble

Adjust

contacts

Contacts

not

aligned

Overheating

Clean

contacts

Contacts

dirty

greasy

coated

with

dark

film

Replace

contacts

Contacts

badly

burned

pitted

Clean

surfaces

current

carrying

parts

Current

carrying

surfaces

dirty

Relocate

provide

adequate

enclosure

Replace

corroded

parts

Corrosive

atmosphere

Increase

capacity

bus

cable

Insufficient

bus

cable

capacity

Tighten

but

not

exceed

elastic

limit

bolts

fittings

Bolts

and

nuts

terminal

connections

not

tight

Check

breaker

application

modify

circuit

decreasing

load

Current

excess

breaker

rating

Provide

adequate

ventilation

Excessive

ambient

temperature

adjust

replace

tripping

device

and

check

mechanism

latch

adjustment

Travel

tripping

device

does

not

provide

positive

release

tripping

latch

Failure

Trip

Replace

trip

unit

Worn

damaged

trip

unit

parts

Check

disconnect

plug

fit

and

terminals

Loose

disconnected

programmer

plug

Tighten

replace

harness

Loose

broken

current

sensor

harness

connections

Check

application

overcurrent

trip

device

False

Tripping

Overcurrent

trip

device

pick

too

low

Check

application

overcurrent

trip

device

Overcurrent

trip

device

time

setting

too

short

adjust

clearances

and

check

latch

adjustment

Insufficient

clearance

trip

paddles

Tap

setting

current

sensors

incorrectly

set

Check

application

Check

polarity

and

connections

Check

continuity

conductors

connecting

the

neutral

sensor

External

ground

sensor

coil

improperly

connected

Failure

and

Latch

align

and

adjust

attachments

Binding

attachments

preventing

resetting

latch

Latch

out

adjustment

Adjust

latch

Latch

return

spring

too

weak

broken

Replace

spring

Clean

bearing

and

latch

surfaces

Hardened

gummy

lubricant

Replace

solenoid

coil

adjust

replace

device

;

verify

minimum

closed

circuit

voltage

(

see

Table

)

Closing

solenoid

burned

out

Solenoid

control

device

not

functioning

properly

Courtesy of NationalSwitchgear.com

Power

Circuit

Breakers

SECTION

—

Basic

Breaker

Components

Disconnects

purpose

enclosure

mounted

breakers

The

secondary

disconnects

allow

removal

the

breaker

without

the

necessity

having

detach

external

connections

The

movable

part

the

secondary

disconnect

consists

insulating

body

which

holds

conducting

spring

loaded

plunger

which

flexible

lead

attached

the

breaker

moves

into

its

enclosure

the

plunger

depressed

sliding

onto

the

stationary

disconnects

the

enclosure

Primary

Disconnects

The

primary

disconnects

are

attached

the

ends

the

breaker

studs

the

rear

side

the

breaker

base

Each

disconnect

assembly

consists

two

pairs

opposed

contact

fingers

These

are

secured

the

breaker

stud

bolt

which

passes

through

the

assembly

and

the

stud

When

engaged

with

the

stationary

stud

the

enclosure

the

disconnect

fingers

exert

set

amount

force

against

the

stationary

stud

through

the

action

the

compression

springs

Retainers

and

spacers

hold

the

contact

fingers

correct

alignment

for

engagement

with

the

stud

The

amount

force

which

the

fingers

exert

against

the

stud

determined

the

degree

which

the

springs

are

compressed

the

bolt

and

nut

which

hold

the

assembly

together

for

any

reason

the

disconnects

must

taken

apart

the

position

the

nut

the

bolt

should

carefully

noted

that

reassemblying

the

original

amount

compression

will

restored

replacing

the

nut

its

former

position

the

bolt

The

nominal

compressed

spring

height

inch

Replacement

Movable

Secondary

Disconnects

replace

movable

secondary

disconnects

proceed

follows

Unfasten

disconnect

body

from

breaker

back

frame

Open

tabs

which

hold

wires

inner

side

Pull

contact

tip

loose

from

hollow

tube

Remove

contact

tip

cutting

wire

its

base

Push

wire

through

hollow

tube

new

disconnect

assembly

Strip

insulation

off

end

wire

about

inch

from

end

Place

new

contact

tip

end

wire

and

crimp

Pull

wire

through

hollow

tube

until

contact

tip

fits

snugly

against

end

hollow

tube

Secondary

Disconnect

(

See

Fig

)

The

secondary

disconnects

serve

connections

between

breaker

control

circuit

elements

and

external

control

circuits

They

are

used

only

draw

out

type

breakers

terminal

board

serves

the

same

purpose

stationary

mounted

and

general

Fig

Movable

secondary

disconnects

Courtesy of NationalSwitchgear.com

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