GE Power Break II User manual

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Power

Break

Circuit

Breaker

Accessories

Mechanical

interlock

for

Draw

Out

Breakers

2500

4000

Frames

Introduction

The

Mechanical

Interlock

accessory

catalog

number

SPDOWB

and

shown

Figure

can

installed

2500

4000

ampere

frame

Power

Break

draw

out

circuit

breakers

This

accessory

for

use

only

with

circuit

breakers

draw

out

substructures

and

shutters

with

manufacture

date

code

later

than

640

(

where

represents

the

plant

where

manufactured

the

year

the

week

that

year

and

the

decade

code

—

this

case

the

)

When

two

breakers

adjacent

compartments

are

connected

with

interlock

rod

shown

Figure

this

accessory

prevents

the

simultaneous

closing

both

breakers

When

either

breaker

the

other

will

immediately

trip

attempt

made

turn

also

When

both

breakers

are

OFF

either

breaker

may

turned

However

when

one

breaker

attempt

the

second

breaker

causes

its

closing

springs

discharge

without

moving

the

contact

arms

override

feature

provided

case

race

condi

tion

(

both

breakers

turned

simultaneously

)

that

the

breaker

designated

primary

turns

and

the

secondary

breaker

trips

Either

both

circuit

breakers

may

CHARGED

any

time

but

the

interlock

operation

activates

only

when

one

the

breakers

Figure

Mechanical

Interlock

attached

Power

Break

draw

out

circuit

breakers

Horizontal

Vertical

Connection

The

interlocked

breakers

can

mounted

and

con

nected

either

vertically

(

one

breaker

above

the

other

)

horizontally

(

breakers

mounted

side

)

The

connecting

rod

can

installed

either

two

posi

tions

for

the

desired

action

All

end

connectors

are

provided

the

customer

need

only

supply

threaded

rod

the

appropriate

length

Installation

WARNING

Before

installing

any

accessories

turn

the

breaker

off

disconnect

from

all

voltage

sources

and

discharge

the

charging

springs

AVERTISSEMENT

Avant

’

installer

tout

accessoire

mettre

disjoncteur

position

OFF

deconnecter

toute

tension

’

alimentation

decharger

les

ressorts

’

armement

EPW

shutters

have

been

installed

the

draw

out

substruc

ture

they

must

removed

before

the

mechanical

interlock

can

installed

Reinstall

the

shutters

after

completing

installation

the

interlock

Figure

Mechanical

Interlock

accessory

components

Courtesy of NationalSwitchgear.com

Breaker

Unit

The

primary

breaker

unit

has

solid

operating

and

the

secondary

breaker

unit

has

spring

loaded

override

link

the

event

race

condition

which

both

breakers

are

turned

simultaneously

while

both

are

OFF

the

primary

unit

turns

and

the

secondary

unit

trips

Either

the

primary

secon

dary

breaker

may

installed

the

top

right

com

partment

Use

the

following

procedure

install

the

interlock

units

each

circuit

breaker

Remove

the

knockout

the

rear

the

breaker

shown

Figure

sure

clean

the

edges

the

hole

that

the

interlock

plunger

can

move

freely

and

out

Install

the

interlock

step

shown

Figure

Install

the

interlock

mechanism

shown

Figure

that

the

roller

goes

into

the

slot

the

trip

claw

Secure

with

four

Philips

head

screws

tightened

Check

that

the

fork

the

interlock

mechanism

moves

freely

Rotating

counterclockwise

should

actuate

the

trip

plunger

Closing

the

breaker

should

move

clockwise

while

tripping

the

breaker

should

return

the

center

position

link

Figure

Interlock

mechanism

installed

the

breaker

plunger

the

hole

made

Substructure

unit

and

Interconnection

Use

the

following

procedure

install

the

interconnect

components

into

the

draw

out

substructures

and

connect

the

breakers

The

type

unit

has

link

attached

the

bottom

tee

connection

while

the

type

unit

has

the

curved

link

attached

the

top

tee

connec

tion

The

two

units

thus

operate

opposite

directions

provide

the

interlock

function

The

type

unit

must

installed

the

top

compart

ment

for

vertical

installation

the

left

compart

ment

for

horizontal

installation

This

provides

“

pull

”

operation

that

the

rod

connecting

the

com

partments

does

not

buckle

After

performing

steps

and

which

are

identical

for

both

vertical

and

horizontal

connections

the

appropriate

step

continue

the

installation

Remove

the

screw

the

rear

the

substructure

indicated

Figure

Knockout

removed

for

installation

the

interlock

plunger

figure

Screw

that

must

removed

provide

clearance

for

the

substructure

interlock

mechanism

Install

the

units

the

breaker

mounting

sup

ports

shown

Figure

Attach

with

four

Philips

head

each

compart

screws

ment

tightened

the

breakers

are

mounted

one

above

the

other

(

vertical

connec

Figure

Interlock

plunger

installed

the

breaker

Courtesy of NationalSwitchgear.com

Horizontal

Interconnection

For

horizontal

installation

attach

the

long

rod

ends

the

pins

the

pivots

shown

Fig

ure

variety

connecting

hardware

pro

vided

the

Mechanical

Interlock

kit

;

the

threaded

rod

supplied

the

customer

Slip

the

provided

heat

shrink

tubing

over

the

rod

that

provides

insulation

within

the

compartment

through

which

the

rod

passes

(

right

side

unit

)

Shrink

the

tubing

place

with

hot

air

source

100

—

300

(

212

—

572

)

Adjust

the

length

the

rod

that

the

pivot

distance

equal

the

center

dis

tance

between

the

two

compartments

Figure

Installation

compartment

unit

onto

the

breaker

mounting

support

Rod

Extender

tion

)

the

type

unit

must

installed

the

upper

compartment

and

the

type

the

lower

the

breakers

are

mounted

side

(

horizontal

connection

)

the

type

unit

must

installed

the

right

compartment

and

the

type

the

left

Rod

Connector

Unit

Attach

Lower

Long

Rod

End

Pivot

Point

Vertical

Interconnection

For

vertical

installation

attach

the

rod

ends

the

pivots

shown

Figure

The

rod

ends

are

provided

the

Mechanical

Interlock

kit

;

the

threaded

rod

supplied

the

cus

tomer

Adjust

the

length

the

rod

that

the

pivot

distance

equal

the

distance

between

the

two

compartments

Both

Units

Lock

Nut

Figure

Attachment

the

interconnection

rod

the

compartment

units

for

horizontal

installation

The

view

from

the

rear

the

compartment

Lower

Link

Installation

Testing

Unit

Before

installing

the

breakers

verify

that

the

rod

linkage

centered

and

free

move

either

direc

tion

After

installing

the

breakers

the

compartments

charge

the

closing

springs

both

breakers

one

the

breakers

then

attempt

the

other

The

second

breaker

should

immediately

trip

Repeat

the

test

with

the

breakers

the

opposite

order

the

sec

ond

breaker

does

not

trip

either

case

check

that

the

rod

connecting

the

breakers

free

move

both

directions

when

the

breakers

are

sequenced

from

OFF

the

rod

adjusted

too

short

one

the

breakers

will

nuisance

trip

even

when

the

other

breaker

off

the

rod

adjusted

too

long

the

inter

lock

mechanism

will

not

operate

properly

good

length

one

that

eliminates

the

slack

between

the

compartment

linkages

Washer

and

Cotter

Lock

Nut

Rod

End

Jpper

Link

Figure

Attachment

the

interconnection

rod

the

compartment

units

for

vertical

installation

The

view

from

the

rear

the

compartment

Courtesy of NationalSwitchgear.com

Tro

Shoo

ting

The

following

guide

provided

for

trouble

shooting

and

isolating

common

problems

does

not

cover

every

possible

situation

Contact

the

Customer

Support

Center

800

843

3742

any

problem

not

resolved

these

procedures

Corrective

Action

Possible

Cause

Symptom

The

rack

not

fully

inserted

Check

the

rack

position

and

necessary

fully

seat

the

substructure

The

second

breaker

turned

Normal

operation

The

first

breaker

prevented

from

closing

when

the

second

breaker

already

The

circuit

breaker

will

not

and

trips

when

attempt

made

turn

the

breaker

Check

the

length

the

connecting

rod

and

verify

compartments

adjusted

too

that

adjusted

the

exact

distance

between

the

breakers

the

condition

persists

lengthen

the

rod

adjustment

The

rod

that

links

the

two

short

Verify

that

the

rod

linkage

centered

and

free

move

either

direction

when

both

circuit

break

ers

are

turned

OFF

The

interlock

unit

not

cor

rectly

installed

Verify

that

the

breaker

plunger

installed

and

that

the

knockout

was

removed

without

ragged

burrs

that

would

prevent

the

plunger

from

sliding

and

out

the

breaker

when

turned

and

OFF

The

fork

should

move

from

left

right

when

the

breaker

turned

The

interlock

was

improp

erly

installed

the

plunger

was

not

installed

Both

circuit

breakers

can

turned

the

same

time

Verify

that

the

rod

linkage

centered

and

free

move

either

direction

when

both

circuit

break

ers

are

turned

OFF

The

rod

connecting

the

two

breakers

not

free

move

Check

the

length

the

connecting

rod

and

verify

that

adjusted

the

exact

distance

between

the

breakers

the

condition

persists

shorten

the

rod

adjustment

The

rod

connecting

the

two

breakers

adjusted

too

long

The

type

and

devices

are

reversed

that

the

inter

Reverse

the

installation

the

and

units

the

circuit

breakers

Vertical

interlock

unit

top

and

unit

bottom

;

horizontal

interlock

unit

right

and

unit

left

The

rod

connecting

the

breaker

compart

ments

bends

buckles

lock

operating

“

push

”

when

either

breaker

rather

than

“

pull

”

mode

turned

These

instructions

not

cover

all

details

variations

equipment

nor

they

provide

for

every

possi

ble

contingency

that

may

met

connection

with

installation

operation

maintenance

Should

further

information

desired

should

particular

problems

arise

that

are

not

covered

sufficiently

for

the

purchaser

’

purposes

the

matter

should

referred

the

Company

Electrical

Distribution

Control

General

Electric

Company

Woodford

Ave

Plainville

06062

1996

General

Electric

Company

DEH

012

0596

Courtesy of NationalSwitchgear.com

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