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II

.

l

>

CUfi

INSTRUCTION

BOOS

UNIT

TECHNICAL

PUBLICATIONS

SECTION

BLDG

.

23

r

ROOM

37

&

EH

-

2021

D

SCHENECTADY

WORKS

i f

*

SUPERCEDES

GEH

-

2021

c

AK

LOW

VOLTAGE

POWER

CIRCUIT

BREAKERS

INSTALLATION

AND

OPERATION

Types

AK

-

2

A

-

15

AK

-

2

A

-

25

AK

-

2

A

-

50

AK

-

2

A

-

75

AK

-

2

A

-

100

AK

-

2

-

50

S

AK

-

2

-

755

AK

-

2

-

100

$

AK

-

2

A

-

50

S

AK

-

2

A

-

75

S

AK

-

2

A

-

100

S

AKF

-

1

A

-

25

AKF

-

18

AKF

-

1

C

AKF

-

2

C

AKF

-

ID

AKF

-

2

D

AKU

-

2

-

25

AKU

-

2

-

50

AKU

-

2

-

50

S

AKU

-

2

A

-

25

AKU

-

2

A

-

50

AK

-

1

-

15

AK

-

1

-

25

AK

-

1

-

50

AK

-

1

-

75

AK

-

1

-

TOO

AK

-

2

-

15

AK

-

2

-

25

AK

-

2

-

50

AK

-

2

-

75

AK

-

2

-

100

AK

-

TA

-

25

SWITCHGEAR

DEPARTMENT

ELECTRIC

GENERAL

PHILADELPHIA

,

P A

.

Courtesy of NationalSwitchgear.com

INSTALLATION

AND

OPERATION

OF

TYPE

AK

POWER

CIRCUIT

BREAKER

RECEIVING

,

HANDLING

AND

STORAGE

Tf

the

circuit

breaker

is

not

to

be

plac

e

in

service

at

once

,

store

It

tn

a

clean

,

dv

location

in

an

upright

position

.

Support

l

Unpack

the

circuit

breaker

as

soon

as

to

prevent

bending

of

the

studs

or

damag

possible

after

it

has

been

received

.

Exer

-

to

any

of

the

breaker

parts

.

Do

not

cove

else

care

in

the

unpacking

to

avoid

damage

the

breaker

with

any

packing

or

otbe

Upon

receipt

of

a

circuit

breaker

,

im

-

to

the

breaker

parts

.

Be

sure

that

no

loos

*

material

which

absorbs

moisture

,

that

ma

mediately

make

an

examination

for

any

parte

are

missing

or

left

in

the

packaging

cause

corrosion

of

breaker

parte

.

.

damage

or

loss

sustained

In

shipment

,

u

material

.

Blow

out

any

dirt

or

loose

parti

-

covering

of

kraft

or

other

non

-

absorbei

injury

,

loss

or

rough

handling

li

evident

,

cles

of

packaging

material

remaining

on

/

or

paper

will

prevent

dust

from

settling

on

th

file

a

damage

claim

at

once

with

the

trans

-

In

the

breaker

.

breaker

.

Before

installing

,

or

operating

these

portatlon

company

and

notify

the

nearest

circuit

breakers

,

make

a

careful

reading

General

Electric

Sales

Office

,

of

the

sections

of

these

instructions

which

are

pertinent

to

the

anticipated

work

.

INSTALLATION

Typical

Outline

Drawing

No

,

are

bolted

solidly

to

the

enclosure

frac

and

need

not

be

removed

from

the

ei

closure

.

LOCATION

Breaker

266

C

753

256

C

754

695

C

116

248

C

703

238

C

123

846

C

281

238

C

192

238

C

193

26

BC

220

8450284

289

C

227

845

C

290

AK

-

1

-

15

AK

-

1

-

25

AX

-

2

-

15

and

25

AK

-

1

-

50

Man

.

Oper

*

AK

-

l

-

60

Elec

.

Oper

.

AK

-

2

-

50

S

.

£

.

Man

.

Oper

,

AX

-

1

-

76

AX

-

1

-

100

AJK

-

2

-

75

Klee

.

Oper

.

AJC

-

2

-

75

S

.

E

.

Man

.

Oper

.

AX

-

2

-

100

Elec

.

Oper

.

AK

-

2

-

100

S

.

E

.

Man

.

Oper

.

The

surface

cm

which

the

breaker

is

mounted

must

be

flat

throughout

in

order

not

to

impose

any

Internal

distortion

on

the

breaker

unit

.

The

supporting

must

be

rigid

enough

to

avoid

stbUlty

of

the

breaker

studs

supporting

the

weight

of

the

breaker

.

Minimum

cutout

dimensions

,

as

given

by

the

appropriate

outline

drawing

,

must

be

maintained

to

provide

adequate

electrical

clearance

.

INDIVIDUALLY

ENCLOSED

BREAKERS

In

choosing

a

location

for

the

installa

-

tion

of

an

AK

Circuit

Breaker

,

there

are

two

factors

to

be

considered

.

The

first

of

these

is

the

effect

of

the

location

on

the

breaker

itself

,

igrmance

and

longer

life

may

be

expected

if

the

area

is

clean

,

dry

.

duet

-

free

,

and

well

ventilated

,

than

il

the

opposites

to

these

conditions

exist

The

second

con

-

sideration

is

convenience

for

operation

and

maintenance

.

The

breaker

should

be

easily

accessible

to

the

operator

,

and

there

should

be

sufficient

space

allowed

for

maintenance

work

to

be

done

if

this

becomes

necessary

.

2

.

Remove

cover

plates

of

snclosu

:

and

prepare

them

to

accommodate

whatev

<

power

entrance

means

is

used

.

Much

better

per

-

3

.

Mount

enclosing

case

to

support

!

structure

.

4

.

Replace

cover

plates

and

ma

power

connections

to

stationary

tormina

In

enclosure

.

5

,

If

the

breaker

.

is

a

type

AX

-

1

AK

-

25

or

AX

-

50

and

-

has

been

reinov

from

the

enclosure

,

It

may

now

be

r

placed

.

Control

power

connections

to

t

terminal

board

should

be

madeasrequirf

(

See

CONNECTIONS

)

.

structure

any

pos

-

MOUNTtNG

AX

Circuit

Breakers

are

designed

to

be

mounted

In

any

one

of

three

ways

.

These

are

dead

front

mounting

,

individual

mounting

with

the

enclosurebeingprovided

,

and

drawout

mounting

In

which

the

breaker

is

designed

for

Insertion

into

a

cubicle

to

drawout

equipment

ouch

as

a

substation

or

eofitrol

board

.

6

.

Before

energizing

the

power

ci

cult

,

operate

the

breaker

several

times

be

sure

that

it

Is

functioning

proper

(

See

OPERATION

)

.

Individually

enclosed

breakers

are

supplied

with

several

types

of

enclosures

,

most

common

Is

the

general

purpose

type

or

the

weather

resistant

type

.

The

former

is

used

for

favorable

indoor

locations

and

These

breakers

are

designed

for

mount

-

the

latter

for

outdoor

locations

or

indoor

mg

in

a

switchboard

or

enclosing

case

of

'

locations

that

may

be

subject

to

unfavorable

the

customer

’

s

design

and

construction

.

conditions

.

All

of

the

enclosures

are

pro

-

Mounting

in

this

instance

consisted

bolting

vtded

with

suitable

means

for

mounting

on

the

breaker

frame

to

a

supporting

structure

walls

or

supporting

framework

.

Removable

within

,

the

switchboard

or

enclosure

,

con

-

cover

plates

are

spirited

with

the

en

-

nectlng

the

power

buses

or

•

cables

,

and

closures

which

may

be

drilled

or

machined

making

any

necessary

control

connections

.

to

accommodate

the

entrance

of

bus

ducts

,

Tue

front

cover

of

the

breaker

enclosure

condutts

or

cables

.

Steps

in

the

procedure

may

be

a

hinged

door

or

a

plate

bolted

to

for

installing

enclosed

the

panel

.

In

either

case

,

it

should

have

a

section

cut

out

,

through

which

the

front

escutcheon

of

the

breaker

may

protrude

*

Outline

drawing

numbers

giving

the

dimen

-

sions

needed

for

preparing

a

suitable

enclosure

or

cubicle

for

the

various

types

of

AX

breakers

are

given

below

.

These

axe

for

standard

2

or

S

pole

breakers

.

DRAWOUT

BREAKERS

AXD

EQUIPMEN

DEAD

FRONT

BREAKERS

Mounting

drawout

breakers

consists

placing

the

breaker

in

the

proj

simply

position

with

respect

to

its

enclose

sliding

or

rolling

tl

by

means

of

a

racking

handle

and

me

?

anism

,

racking

it

through

the

last

part

of

movement

during

which

the

stationary

<

movable

halves

of

the

disconnect

eng

&

Large

drawout

breakers

are

fastened

t

telescoping

tray

which

extends

out

from

enclosure

to

receive

the

breaker

.

Snj

breakers

have

guides

on

their

side

pla

which

slide

in

channels

in

the

encloaur

Both

large

and

small

breakers

have

a

t

posttion

in

which

the

secondary

discourse

are

engaged

,

but

the

primary

discount

are

not

.

In

this

position

,

the

breaker

a

be

operated

electrically

without

energiz

the

load

cable

or

bus

.

to

a

stop

position

,

a

:

breakers

follow

:

1

.

If

the

breaker

is

an

AX

-

15

,

AK

-

25

or

an

AK

-

SO

,

remove

It

from

the

enclosure

.

With

AK

-

50

breakers

,

a

handle

and

cam

arrangement

is

used

for

that

part

of

the

breaker

movement

that

involves

the

dis

-

engagement

or

engagement

of

the

primary

disconnect

.

AK

-

76

and

AK

-

100

breakers

These

instructions

do

not

purport

to

cover

all

details

or

Variations

in

equipment

nor

to

provide

for

ovary

possible

contingenvy

to

be

mot

in

connection

with

installation

,

operation

or

maintenance

.

Should

farther

information

be

desired

or

dteuld

porttcoter

prob

/

*

m

»

arise

which

are

not

covered

sufficiently

for

the

purchaser

'

s

purposes

,

the

matter

ihou

/

d

he

referred

to

the

General

Bee

trie

Company

.

Courtesy of NationalSwitchgear.com

C

&

H

-

2021

Installation

and

Operation

of

Typo

AK

Power

Circuit

Breakers

cause

the

breaker

to

bo

trip

free

.

Tighten

the

3

/

8

inch

hex

head

screws

inserted

In

'

the

front

holes

of

the

dr

aw

out

tray

during

step

5

of

this

operation

.

The

breaker

is

new

in

the

operating

position

.

Withdrawing

Breaker

A

-

K

-

50

,

76

and

100

Use

D

5

GH

47

lubricant

on

the

disconnect

secondary

contacts

are

disengaged

.

Again

terminals

to

reduce

the

force

required

to

lift

the

position

stop

handle

.

Slide

the

insert

the

breaker

.

breaker

slightly

forward

to

remove

it

from

the

enclosure

.

The

procedure

for

inserting

and

with

-

drawing

a

drawout

breaker

from

its

en

-

closure

is

as

follows

;

Inserting

Breaker

AK

-

50

,

75

and

100

1

.

Lift

the

breaker

to

a

position

ap

-

proximately

—

s

4

x

-

4

nohes

-

above

-

iheJieight

_

_

Ql

the

compartment

tray

.

2

.

Pull

the

drawout

tray

out

under

the

breaker

as

far

as

the

tray

will

travel

.

NOTE

-

When

installing

an

individual

skeleton

housing

for

a

drawout

AK

-

5

G

or

75

,

locate

a

bolt

head

over

the

two

frontbottom

mounting

holes

of

the

housing

to

provide

a

limit

stop

for

the

drawout

tray

.

3

.

Lower

the

breaker

about

1

/

2

"

above

the

dowel

pina

on

the

tray

and

push

the

breaker

back

into

its

compartment

so

that

the

rear

bottom

angle

of

the

breaker

is

against

the

guides

on

the

tray

directly

back

of

the

dowel

pins

.

4

.

Slowly

lower

the

breaker

onto

the

tray

and

at

the

same

time

guide

it

so

that

the

holes

in

the

rear

angle

of

the

breaker

fit

over

the

two

dowel

pine

on

the

tray

.

If

the

breaker

is

correctly

positioned

on

the

dowels

,

its

rear

and

aide

bottom

frame

angles

will

all

sit

firmly

on

the

tray

.

5

^

Insert

two

3

/

8

Inch

heJt

.

head

screws

through

the

holes

in

the

front

of

the

side

angles

on

the

breaker

and

thread

them

part

way

into

the

tapped

holes

in

the

tray

.

Dp

not

tighten

screws

firmly

.

This

provides

better

alignment

of

the

primary

stationary

studs

and

the

primary

disconnects

for

the

subsequent

racking

operation

.

6

.

Push

the

breaker

into

the

compart

-

ment

until

the

"

teat

"

position

stop

engages

to

prevent

further

travel

.

(

Note

-

Refer

to

section

describing

"

Test

Position

"

in

these

instructions

.

)

7

.

Release

the

test

position

atop

by

depressing

Us

lever

and

push

the

breaker

back

into

the

compartment

until

the

racking

pins

on

the

housing

butt

against

the

outer

surface

of

the

.

racking

cam

.

In

this

posi

-

tion

,

the

racking

pin

has

lifted

the

locking

arm

on

the

cam

which

allows

the

racking

handle

to

be

lifted

enough

to

allow

the

pawl

to

engage

the

first

notch

on

the

cam

.

1

.

Trip

the

breaker

to

release

the

positive

racking

interlock

.

Inserting

Breaker

AK

-

15

and

25

1

,

Trip

the

breaker

.

2

.

Raise

the

breaker

until

the

guides

on

the

sides

of

the

breaker

are

level

with

their

mating

supporting

channels

in

tee

enclosure

,

and

slide

the

breaker

part

way

into

its

enclosure

.

(

Note

-

The

breaker

will

be

obstructed

by

a

position

stop

at

the

bottom

of

the

enclosure

after

the

breaker

has

traveled

only

a

short

distance

into

the

cubicle

,

located

at

the

bottom

right

of

the

enclosure

,

which

will

release

the

position

stop

and

allow

the

breaker

to

travel

further

Into

the

cubicle

)

.

2

.

Lift

the

racking

handle

as

far

as

U

will

go

.

This

operation

will

re

-

engage

UK

*

trip

interlock

in

hold

the

breaker

trip

free

for

the

remainder

of

the

racking

operation

.

Note

that

here

the

cam

is

rotated

by

lifting

the

handle

,

whereas

in

racking

the

breaker

in

,

the

operation

is

performer

as

a

H

of

pushing

the

handle

down

.

3

.

Reset

the

handle

to

its

lowered

position

and

lift

it

again

.

This

operation

must

be

performed

5

times

to

completely

disengage

the

cams

from

their

racking

pins

.

After

the

fifth

lifting

stroke

let

.

the

handle

drop

to

Its

normal

position

.

Lift

the

position

stop

handle

,

4

.

Pull

the

breaker

out

oi

lbs

com

-

partment

until

the

test

position

stop

engages

to

hold

the

breaker

in

the

"

test

"

position

.

3

.

Raise

the

rackout

handle

forward

and

up

as

far

as

its

travel

will

permit

and

push

the

breaker

into

the

enclosure

until

the

rackout

pins

on

the

handle

assembly

bear

against

the

housing

rackout

cams

on

the

side

of

the

enclosing

case

.

5

.

Depress

the

teat

position

stop

han

-

dle

and

pull

the

breaker

out

of

its

com

-

partment

as

far

as

the

drawout

tray

Will

travel

.

4

,

Pugh

downward

on

the

rackout

han

-

dle

forcing

the

pins

on

the

handle

up

into

the

slot

In

the

stationary

cam

plate

.

This

action

forces

the

breaker

through

a

.

final

short

portion

of

its

movement

into

the

en

-

closure

and

allows

the

operator

to

provide

the

force

necessary

to

make

the

primary

disconnects

engage

the

stationary

studs

in

the

enclosure

,

In

performing

this

operation

,

make

sure

that

the

handle

ie

rotated

down

-

wards

as

far

as

its

free

travel

will

permit

iind

then

pull

the

racking

handle

down

to

be

sure

tee

trip

interlock

is

released

.

(

Note

-

When

tbe

racking

handle

Is

In

any

position

other

than

completely

down

,

the

breaker

cannot

be

operated

and

is

held

trip

-

free

by

the

trip

interlock

.

This

ap

-

plies

to

the

"

fully

in

"

and

"

test

"

positions

,

)

6

.

Remove

the

two

3

/

8

hex

.

head

screws

which

hold

the

breaker

on

the

tray

.

7

.

Attach

a

lifting

device

to

tee

top

frame

of

the

breaker

.

8

.

LUt

the

breaker

approximately

i

/

2

inch

off

the

dowel

pins

on

the

tray

and

then

pull

the

breaker

forward

until

ite

primary

contacts

clear

tee

compartment

.

9

.

Push

the

tray

all

the

way

back

into

its

compartment

.

The

breaker

is

now

free

from

Its

compartment

.

TEST

POSITION

8

.

When

the

pawl

engages

the

first

The

"

Test

Position

”

,

as

referred

to

in

notch

on

tee

cam

,

push

the

handle

down

the

previous

Inductions

,

Is

that

breaker

again

to

its

normal

position

.

This

causes

position

where

tee

primary

power

disc

on

-

the

cam

to

rotate

about

the

racking

pin

,

neet

contacts

are

safely

disengaged

but

trie

Repeat

this

operation

five

times

to

rack

the

secondary

control

disconnects

are

engaged

breaker

into

Its

fteal

operating

position

.

.

In

this

position

,

the

breaker

may

bo

tested

Interlocksi

hold

the

breaker

trip

free

until

or

operated

,

manually

or

electrically

with

-

it

is

racked

Into

the

fully

contacted

position

.

out

energising

the

primary

power

circuit

.

The

fifth

i

stroke

of

the

handle

Is

only

a

provided

the

racking

handle

has

been

moved

partial

stroke

and

does

not

result

tn

any

to

tee

completely

down

position

,

thus

re

-

further

movement

of

the

breaker

.

It

does

leasing

the

trip

interlock

,

serve

three

useful

purposes

:

it

positions

the

cam

so

that

it

cannot

rotate

and

allow

the

breaker

to

back

out

under

short

circuit

stresses

;

the

partial

stroke

signals

that

the

racking

operation

is

complete

,

and

it

re

-

leases

the

trip

interlock

which

was

engaged

by

tlve

racking

pin

during

the

previous

four

pumps

of

the

racking

arm

.

NOTE

:

Once

a

racking

operation

has

been

started

,

It

must

be

completed

,

as

tee

breaker

cannot

be

reversed

until

the

racking

operation

Is

completed

.

Withdrawing

Breaker

AK

-

15

and

25

1

.

Trip

the

breaker

open

.

If

the

breaker

is

not

open

,

the

Interlock

lever

of

the

drawout

mechanism

will

not

permit

operation

of

the

rackout

handle

,

2

.

Pull

the

racking

handle

up

and

for

-

ward

as

far

as

ft

will

travel

,

disengaging

the

primary

disconnects

.

3

.

Slide

the

breaker

out

until

the

position

stop

engages

in

the

front

slot

In

the

bottom

of

the

breaker

carriage

.

The

breaker

is

now

in

the

"

test

"

position

,

where

its

primary

disconnects

are

safely

disconnected

from

the

line

and

load

ter

-

minals

of

the

enclosure

.

(

Note

-

Refer

to

section

describing

"

Test

Position

"

in

these

instructions

.

)

4

.

To

remove

the

breaker

from

Its

enclosure

,

lift

the

position

stop

handle

and

slide

thq

breaker

forward

until

the

position

stop

engages

the

rear

slot

In

the

bottom

of

the

breaker

carriage

.

This

is

the

safety

position

stop

where

both

the

primary

and

"

TSS

:

--

For

a

more

complete

description

ai

drawout

mechanisms

and

enclosures

see

AKD

DRAWOUT

EQUIPMENT

INSTRUC

-

TION

S

,

GEH

-

1830

andAKD

5

DrawoutEquip

-

ment

Instructions

GEH

-

83902

,

•

DRAWOUT

BREAKERS

AKD

5

EQUIPMENT

NOTE

:

AKD

5

breakers

are

identified

by

letter

"

A

"

appearing

after

breaker

number

-

-

A

A

*

*

%

4.4

4

.

v

*

.

example

,

t

,

AK

-

2

A

-

15

"

.

9

.

After

completing

the

fifth

racking

stroke

,

ltft

the

handle

as

high

as

it

will

go

-

A

~

.

.

.

and

allow

it

to

drop

to

its

normal

position

.

•

Draw

ou

t

M

eg

hanismOpe

r

a

turn

-

There

&

®

NOTE

:

Any

strokes

beyond

this

point

will

'

four

positions

of

the

drawout

mechanism

.

4

Courtesy of NationalSwitchgear.com

Installation

and

Operation

of

Type

AK

Power

Circuit

Breakers

GEH

-

20

jt

.

The

Connected

Position

-

the

breaker

in

the

operating

position

,

both

primary

and

secondary

contacts

made

and

the

door

may

be

closed

.

2

.

The

Test

Position

-

the

primary

(

power

)

contacts

not

made

but

the

secondary

weaker

test

not

Involving

power

maybe

made

In

tills

position

.

The

door

may

be

closed

in

this

position

.

3

.

Disconnect

Position

-

neither

the

pri

-

mary

nor

the

secondary

contacts

made

.

The

door

may

be

closed

.

4

.

Fully

Withdrawn

Position

-

the

breaker

completely

out

of

its

compartment

ready

for

removal

from

the

timer

housing

.

The

door

must

be

open

in

this

position

.

TERMINAL

BOARDS

^

REMOTE

CLOSE

SW

.

O

i

O

—

"

i

O

20

T

NOTE

:

-

TERMINAL

BOARD

LOCATED

-

©

N

-

RlGW

-

T

SIDE

OF

BREAKEft

-

EOR

AK

-

lft

/

26

WITH

EXTERNAL

CONN

-

ECTIONS

MADE

TO

RIGHT

SIDE

OF

BOARD

.

FOR

AK

-

3

O

/

73

/

}

0

O

TERMINAL

BOARD

LOCATED

ON

LEFT

SIDE

WITH

EXTERNAL

CONNECTIONS

MADE

TO

LEFT

SIDE

OF

BOARD

*

CLOSING

VOLTAGE

SOURCE

O

40

o

7

FUSES

TRIP

\

HI

—

O

5

O

0

60

O

7

o

O

80

09

0

:

0

«

oO

TRIPPING

VOLTAGE

SOURCE

SOURCE

FOR

UNDE

RVOLTA

GE

TRIPPING

1

POTENTIAL

r

*

SOURCE

FOR

(

+

)

REVERSE

J

CURRENT

DEVICE

—

(

E

—

\

LZjy

|

f

(

-

)

CZ

2

NOTE

:

The

mechanism

is

designed

to

reverse

automatically

in

the

connect

and

fully

disconnected

position

,

an

operation

io

started

It

must

be

pleted

.

Completion

of

an

operation

is

indicated

by

the

red

knob

retracting

to

Its

original

position

.

(

LM

—

1

TO

(

a

)

CONTACT

OF

AUXILIARY

SWITCH

Once

com

-

(

Fs

-

orrb

VI

«

w

)

rig

.

1

Breaker

Insertion

AK

-

2

A

-

With

the

inner

housing

In

'

"

the

connected

position

proceed

as

follows

:

5

.

Pueh

the

breaker

in

against

the

tra

<

stops

:

Rotate

the

two

lock

links

i

lock

the

breaker

in

place

*

Close

it

door

.

NOTE

:

When

moving

a

breaker

fro

:

one

position

to

another

be

sure

break

*

is

tripped

open

.

4

Pull

the

red

knob

.

Pull

the

mechanic

operating

handle

two

times

until

the

te

<

position

is

reached

.

3

.

Open

the

housing

door

and

rotate

the

two

track

lock

links

,

releasing

the

tracks

.

Pull

the

tracks

out

to

the

limit

of

their

travel

*

This

is

the

fully

with

-

drawn

position

.

1

c

Pull

tha

red

knob

.

Pull

the

mechanism

operating

handle

fully

out

and

allow

tttb

return

to

its

original

position

*

Repeat

this

three

more

times

*

The

inner

houae

Is

now

in

the

test

position

.

2

.

Pun

the

red

knob

a

.

galn

.

Pull

the

mecha

-

nism

operating

handle

two

complete

strokes

drawing

the

inner

housing

to

the

disconnect

poaition

.

4

.

With

A

lifting

device

,

raise

the

breaker

so

the

mounting

pins

are

about

one

inch

above

the

track

*

.

Lower

breaker

so

the

breaker

mounting

plna

drop

into

the

slots

in

the

tracks

.

Remove

the

lifting

device

cable

.

NOTErWHEN

SEPARATE

PWR

.

SOURCE

FOR

CLOSING

IS

~

USED

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OMIT

C

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A

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&

o

—

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>

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c

A

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A

4

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THEN

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.

DISCONNECTS

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LOCATED

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7

o

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t

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-

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25

Breaker

CoxnpnrtmeiYb

FIs

-

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t

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Courtesy of NationalSwitchgear.com

X

.

'

H

-

'

Installation

and

Operation

0

i

Type

AK

Power

Circuit

Breakers

GEH

-

2021

charged

mechanism

atm

liar

to

the

one

used

AK

-

50

/

7

S

/

100

electrically

operated

breakers

.

AK

-

2

-

fiO

/

75

/

l

00

breakers

are

closed

by

rotating

the

closing

handle

counterclockwie

©

through

approxi

-

mately

120

degrees

,

and

then

clockwise

degrees

to

the

normal

on

manual

I

OTt

-

Cjj

oux

*

rv

i

“

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^

WtTCS

|

—

il

-

J

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*

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F

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r

^

T

4

^

4

*

^

4

=

^

-

sis

.

#

\

\

L

_

~

—

baefe

—

throu

Jiandie

position

.

Four

such

complete

move

-

menta

of

the

handle

arc

required

to

close

w

the

breaker

.

During

the

four

counterclock

'

’

wise

movements

and

the

first

three

clock

-

wise

movements

of

the

handle

,

the

springs

•

;

?

charged

,

After

approximately

70

de

-

crees

travel

of

the

fourth

clockwise

handle

movement

,

the

spring

charged

mechanism

is

driven

aver

-

center

and

the

breaker

ciooee

.

A

charge

-

indicator

,

numbered

1

to

viewed

through

the

breaker

front

escutcheon

,

moves

with

each

complete

handle

movement

and

indicates

the

number

of

complete

handle

movements

that

have

bean

performed

.

JW

£

JL

_

Ul

ss

II

r

•

i

ir

5

'

4

^

L

0

>

UL

m

ajjxm

M

COfL

:

r

!

LEGEND

(

M

)

-

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SOTW

£

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)

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*

•

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V

*

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V

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ELECTRICAL

CLOSING

(

Figures

6

and

7

)

STANDARD

BREAKERS

Fig

.

7

35

jcipiiried

Elementary

piogrem

Internal

wiring

AK

-

X

>

;

75

and

100

Fig

,

6

Simplified

Elementary

Eiasreua

internal

Wiring

AK

-

15

and

25

A

&

-

18

and

AK

-

25

electrically

operated

breakers

are

closed

by

a

solenoid

coll

.

The

armature

of

the

adenoid

Is

linked

to

the

breaker

mechanism

and

its

movement

,

energised

,

operating

the

X

contacts

.

This

operating

through

the

mechanism

,

closes

seals

in

the

X

relay

and

energizes

the

the

breaker

.

The

closing

solenoid

circuit

motor

once

again

and

the

closing

operation

may

be

operated

by

a

push

button

closing

takes

place

,

switch

on

the

breaker

or

by

a

remote

(

twitch

or

relay

,

depending

on

the

individual

arrangements

desired

.

When

a

closing

signal

Is

given

,

the

X

relay

coll

is

ener

-

gy

ed

and

It

in

turn

closes

Its

contacts

.

One

Functionally

,

the

quick

close

mecha

-

of

these

seals

In

the

X

coll

circuit

;

the

nlem

differs

from

the

standard

electrical

other

three

,

which

are

arranged

in

aeries

,

.

mechanism

in

that

the

pre

-

charge

operation

energise

the

solenoid

closing

coil

.

As

the

is

extended

to

completely

charge

the

closing

breaker

closes

,

a

mechanically

operated

springs

.

At

the

end

of

the

charging

opera

-

switch

opens

one

pair

of

its

contacts

(

bb

)

tton

,

which

takes

approximately

5

seconds

,

and

closes

another

<

aa

)

.

The

contacts

a

latch

plate

engages

the

prop

roller

to

which

open

cut

out

the

X

relay

coll

.

The

prevent

the

closing

springs

from

dls

-

contacts

which

close

energise

the

Y

relay

charging

.

cotif

whose

contacts

now

seal

in

the

Y

coU

and

hold

open

the

X

relay

coil

circuit

.

This

prevents

another

closing

operation

If

one

of

the

protective

devices

operates

to

trip

the

breaker

before

contact

at

the

closing

switch

Is

released

.

and

de

-

energize

the

control

relay

.

The

auxiliary

switch

contact

opens

preventing

the

control

relay

from

being

energized

until

the

breaker

la

tripped

open

,

with

the

Cr

switches

closed

*

the

motor

charges

the

closing

springs

ready

for

the

next

closing

operation

.

^

5

QUICK

CLOSE

BREAKERS

(

Figure

8

)

MANUAL

OR

MAINTENANCE

CLOSING

OF

ELECTRICAL

BREAKERS

i

All

electrical

breakers

may

be

closed

manually

by

means

of

the

maintenance

handle

furnished

with

the

breaker

or

switch

-

gear

.

To

close

AK

-

1

-

15

/

25

breakers

:

WUh

the

closing

springs

fully

charged

1

,

Make

sure

handle

is

in

proper

position

,

the

breaker

Is

ready

for

a

closing

operation

Handle

Is

stamped

this

side

up

.

upon

release

of

the

prop

roller

.

This

may

be

accomplished

either

manually

,

by

de

-

pressing

the

closing

lever

on

the

breaker

,

or

electjicaUy

by

closing

the

remote

clos

-

Large

AK

breakers

(

AK

-

&

0

/

75

/

100

)

lug

switch

,

upon

the

release

of

the

prop

are

closed

by

the

discharge

of

a

closing

roller

the

closing

springs

discharge

and

spring

.

This

rotates

a

crankshaft

which

,

close

the

breaker

In

the

same

manner

as

by

means

of

an

attached

roller

,

operates

on

the

standard

electrical

breaker

.

A

closing

cam

,

forcing

the

movable

breaker

contacts

against

the

stationary

contacts

.

With

control

voltage

applied

,

the

motor

The

closing

spring

Is

charged

through

the

is

energized

through

the

G

switch

contacts

,

operation

of

a

motor

and

gear

reduction

and

charge

*

the

closing

springs

.

When

the

springs

reach

the

fully

charged

position

,

the

mechanically

operated

switches

operate

,

The

electrical

control

system

is

com

-

reversing

their

contacts

.

Upon

operation

prised

of

ftfiX

relay

,

two

double

contact

of

these

switches

the

motor

ts

stopped

by

mechanically

operated

switches

(

F

and

G

)

,

the

opening

of

the

G

switch

.

The

closing

a

push

button

closing

switch

and

any

means

of

the

F

switch

prepares

the

breaker

for

for

remote

closing

which

the

user

may

a

closing

operation

,

j

?

incorporate

Into

the

system

.

When

voltage

is

first

applied

to

the

breaker

,

(

before

any

u

?

t

closing

signal

ts

given

)

the

motor

is

ener

-

&

Sized

through

two

of

the

X

relay

contacts

and

the

two

G

switch

contacts

.

The

motor

then

.

compresses

the

closing

springs

to

the

^

‘

pro

-

charged

'

1

position

at

which

point

the

£

mechanically

operated

F

and

G

switches

are

operated

.

'

This

opens

the

G

contacts

,

stopping

the

motor

,

and

closes

the

F

con

-

tacts

,

which

readies

the

system

for

the

actual

closing

of

the

breaker

.

When

the

push

button

or

remote

switch

signals

for

«

•

closing

operation

,

the

X

relay

coll

ts

2

.

Flace

the

handles

fork

like

fingers

above

the

armatures

stop

nut

that

extends

below

the

magnet

behind

the

front

escutcheon

and

lift

up

.

This

forces

the

dosing

.

the

breaker

'

s

armature

down

contacts

.

CLOSING

I

SwffCH

—

T

+

S

88

F

:

unit

.

£

"

5

^

-

0

=

~

A

4

=

f

UJ

g

?

-

X

-

y

M

=

jfcQ

;

-

L

(

l

[

)

\

w

See

A

closing

signal

now

given

energizes

the

control

relay

X

whose

contacts

close

and

complete

the

circuit

through

the

closing

relay

coll

.

With

the

closing

relay

coU

energized

the

breaker

closes

as

described

above

.

At

the

same

time

the

closing

relay

contact

closes

to

energize

the

anti

-

pump

relay

causing

its

contacts

to

viding

the

anti

-

pump

feature

.

When

the

breaker

closes

,

the

mechani

-

cal

operated

G

switches

close

to

energize

the

motor

again

and

the

F

switches

open

i

d

X

LEGEND

Ec

:

ccSo

5

r

4

ffiLW

£

-

ANTI

-

PUMP

fifXAY

CONTACT

5

•

3

"

;

reverse

pro

-

M

-

CLOSING

MQTOfc

W

-

ANTI

-

PUMP

RELAY

CO

*

L

i

-

cx

\

%

i

mtfssr

^

4

:

-

NORMALLT

OPEN

SWITCH

CONTACTS

£

-

NORMALLY

CLOSE

0

SWITCH

CONTACTS

SlMFUn

&

D

ELEMENTARY

DIAGRAM

JNTCftNAf

.

wiBlNg

QU

>

CK

CLOSE

SftEAK

^

H

7

Fig

.

8

Courtesy of NationalSwitchgear.com

rEH

~

2031

Installation

and

Operation

of

Type

AK

Power

Circuit

Breakers

,

Pull

the

red

knob

again

and

pull

the

NOTE

:

The

installation

of

AK

50

S

/

75

S

/

which

applies

to

each

breaker

specifically

,

mechanism

operating

handle

four

times

,

1

Q

0

S

/

AKF

2

C

/

2

D

and

breakers

equipped

Depending

on

.

the

breaker

type

,

those

con

-

The

breaker

will

now

be

completely

with

the

quick

-

closing

mechanism

Is

the

nections

are

made

either

to

a

terminal

inserted

,

in

its

connected

position

.

same

as

the

other

breakers

described

in

board

on

the

breaker

or

to

the

stationary

this

book

.

The

only

difference

occurs

with

parte

of

the

secondary

disconnects

,

drawout

breakers

.

The

compartments

that

house

the

quick

-

close

breakers

will

be

INDIVIDUALLY

ENCLOSED

AND

equipped

with

an

Interlock

that

prevents

the

STATIONARY

BREAKERS

manual

discharging

of

the

closing

springs

reaker

Removal

AK

-

2

A

.

Trip

the

breaksr

.

The

-

customers

external

connecttonfcL

for

operation

of

breaker

control

components

and

accessories

are

shown

in

Fig

,

i

.

DRAWOUT

BREAKERS

fleeted

position

)

,

provided

with

both

AKD

and

AKD

5

equip

-

ment

that

require

quick

-

close

breakers

*

CONNECTIONS

All

electrical

connections

should

be

made

to

assure

good

conductivity

.

Mating

surfaces

should

be

parallel

and

firmly

bolted

or

clamped

together

,

Contact

sur

-

faces

should

be

clean

and

have

a

smooth

finish

.

The

bus

or

cable

connecting

to

the

breaker

should

have

adequate

current

-

carry

!

ng

Capacity

to

prevent

excessive

heating

.

Control

circuit

connections

should

bo

made

according

to

the

wiring

diagram

This

interlock

will

be

,

Move

the

breaker

and

inner

housing

to

the

fully

withdrawn

position

.

(

See

Breaker

Insertion

,

Steps

1

,

2

and

3

)

.

.

Attach

lifting

device

and

lift

breaker

up

and

away

from

compartment

until

pri

-

mary

disconnects

clear

the

compart

-

ment

.

The

customers

external

control

con

-

nections

to

these

breaker

#

are

made

to

the

stationary

secondary

disconnected

lo

-

cated

in

the

breaker

compartment

as

shown

in

Figs

.

2

and

3

,

AKD

Equipment

and

Figs

.

4

and

o

AKD

5

Equipment

.

(

Note

*

-

If

the

breaker

is

used

in

a

General

Electric

Corn

-

pany

*

Drawout

Switchgear

Equipment

,

all

external

connections

must

be

made

to

terminal

blocks

located

in

the

rear

vertical

wiring

trough

of

the

equipment

)

t

Mo

?

?

thv

inner

hquging

tp

the

connected

position

by

pushing

the

track

#

back

against

the

track

stops

and

then

follow

Steps

8

and

7

under

Breaker

Insertion

.

The

inner

housing

is

now

in

the

con

-

nected

position

and

the

breaker

is

free

from

its

compartment

.

OPERATION

In

closing

an

AK

-

1

-

15

/

25

/

50

manual

breaker

on

a

load

,

make

the

handle

,

move

-

ment

with

a

fast

,

snapping

action

in

order

to

prevent

-

unnecessary

beating

of

th

*

breaker

contacts

.

The

closing

mechanism

o

!

the

AK

-

2

-

50

/

75

/

100

manual

breakers

is

a

spring

AK

-

2

-

15

/

25

and

AK

-

1

-

50

manually

operated

breakers

are

closed

by

turning

the

handle

SO

degrees

counterclockwise

and

then

clockwise

90

degrees

back

to

the

original

position

.

The

initial

counterclock

-

wise

movement

resets

the

closing

mecha

-

nism

.

The

clockwise

movement

closes

the

breaker

.

MANUAL

CLOSING

AK

-

1

-

15

and

A

&

-

1

-

25

breakers

are

losed

by

rotating

the

breaker

handle

In

clockwise

direction

approximately

90

agrees

.

Alter

tripping

,

the

closing

meeba

-

\

jsm

resets

automatically

bv

means

of

wrings

.

TRIP

CLOSE

/

'

SOURCE

SOURCE

•

TRIP

CLOSE

SOURCE

SOURCE

REMOTE

CLOSE

REMOTE

(

X

)

(

YTOO

(

Y

)

;

CLOSE

(

X

)

(

y

)

(

X

)

(

Y

)

FUSES

\

r

~

i

4 4

Set

*

.

li

-

ar

T

REMOTE

rV

:

TRIP

-

:

v

STA

,

SEC

.

STA

.

SEC

.

DISCONNECTS

LOCATED

AT

TOP

OF

COMR

V

-

L

.

Cr

'

DISCONNECTS

*

«

rV

i

HHHtttVxWp

AAA

A

'

-

T

\

%

2

I

i

AAA

a

c

A

s

.

.

J

>

?

>

>

\

t

>

>

5

>

>

3

>

>

2

>

>

l

>

<

\

<

<

2

<

<

3

<

<

4

<

C

^

<

5

<

<

6

<

<

7

<

FURNISHED

ONLY

WHEN

REQUIRED

FURNISHED

ONLY

WHEN

REQUIRED

FRONT

VIEW

AK

-

2

A

-

50

,

75

,

100

BREAKER

COMPARTMENT

FRONT

VIEW

AK

-

IA

-

15

,

25

A

AK

-

2

A

-

I

5

,

2

S

BREAKER

COMPARTMENT

Fig

.

5

Fig

.

4

Courtesy of NationalSwitchgear.com

GEH

-

2021

.

installation

and

Operation

of

Type

AK

Power

Circuit

Breakers

To

close

AK

-

2

-

15

/

25

breakers

:

ference

between

the

enclosure

and

the

on

the

trip

shaft

,

Looking

at

the

breaker

spring

discharge

lever

on

the

breaker

,

if

from

the

right

,

countered

ockwi

&

e

rotation

1

.

Place

the

two

small

hooks

of

the

handle

manual

closing

Is

desired

with

the

breaker

,

,

of

the

trip

shaft

causes

the

breaker

to

trip

;

into

the

two

slots

located

in

the

lower

racked

in

,

the

interference

feature

must

be

clockwise

movement

resets

the

mechanise

portion

of

the

front

escutcheon

.

removed

,

otherwise

the

breaker

can

be

latch

.

The

manual

trip

button

,

overload

manually

closed

in

the

test

position

or

fully

devices

,

shunt

trip

,

undervoltege

tripptnr

2

.

Rotation

of

the

long

end

of

the

handle

racked

out

position

only

.

device

,

and

reverse

current

trip

all

operate

downwards

forces

the

shorter

end

of

in

this

fashion

to

trip

the

breaker

,

The

the

handle

upwards

against

the

bottom

1

«

With

the

ratchet

type

maintenance

handle

.

movement

of

the

striker

arms

of

all

#

{

of

the

solenoid

armature

,

and

closes

_

applied

_

tq

_

jhe

gear

box

shaft

,

operate

these

,

when

activated

,

should

move

from

the

breaker

’

s

contacts

.

"

tho

handle

until

the

springs

are

fully

1

/

32

to

1

/

1

$

Inch

beyond

the

point

at

which

charged

.

The

fully

charged

position

t

$

tripping

occurs

.

Tfite

is

what

to

mojuu

try

indicated

by

the

spring

charge

indicator

the

expression

,

”

p

<

>

B

4

t

*

ve

tripping

"

,

and

by

solid

resistance

to

any

further

handle

operation

.

To

close

AK

-

50

/

75

A

0

O

breakers

:

1

*

Place

the

ratchet

type

maintenance

handle

on

the

shaft

that

protrudes

from

the

gear

reduction

unit

.

2

.

Operate

handle

until

the

spring

charge

indicator

reads

charged

.

3

.

Continue

to

operate

handle

until

the

closing

springs

discharge

and

close

the

contacts

.

To

close

AK

-

503

/

75

SA

00

S

,

AJ

£

F

2

C

,

2

D

breakers

and

breakers

equipped

with

the

quick

closing

mechanism

:

Most

air

circuit

breakers

are

equipped

with

series

overcurrent

trip

devices

either

e

(

instantaneous

or

Instantaneous

2

.

Push

down

on

the

push

to

close

lover

to

release

the

energy

stored

in

the

closing

springs

which

closes

the

breakers

con

-

tacts

.

oz

me

dual

magnetic

typ

and

time

delay

tripping

)

i

alone

.

Breakers

are

designed

to

carry

up

to

100

%

of

the

continuous

current

rating

of

their

trip

devices

.

Any

attempt

to

earrv

higher

currenta

for

a

prolonged

period

wifi

cause

overheating

and

possible

damage

TRIPPING

The

breaker

la

tripped

,

open

by

the

displacement

of

a

mechanism

latbh

,

which

allows

a

toggle

linkage

supporting

the

movable

contacts

in

the

closed

position

to

collapse

.

rigidly

to

a

trip

shaft

which

iiiua

hori

-

zontally

from

left

to

right

through

the

breaker

.

tripping

the

breaker

operate

through

striker

arms

which

displace

the

mechanism

trip

2

.

"

Selection

and

Application

of

Power

latch

by

moving

against

trip

paddles

fastened

Circuit

Breakers

”

GET

-

U

13

.

TYPE

AKU

AND

BREAKERS

WITH

FUSE

-

BREAKER

COMBINATIONS

For

a

more

detailed

discussion

of

the

construction

,

operation

,

and

application

of

over

current

trip

devices

ref

or

to

the

follow

-

ing

publications

:

This

trip

latch

is

fastened

NOTE

:

All

AKD

,

or

AKD

-

5

drawout

type

breakers

equipped

with

the

quick

closing

mechanism

cannot

normally

be

closed

manually

when

In

the

racked

in

(

connected

position

)

,

due

to

mechanical

designed

inter

-

1

.

Maintenance

manual

for

specific

breaker

involved

(

see

"

Maintenance

”

;

All

of

the

means

provided

for

Open

Fuse

Lockout

Device

left

hand

side

of

the

breaker

(

looking

from

allowing

the

reset

button

to

extend

forward

front

)

.

The

purpose

of

this

device

ie

to

indicating

which

fuse

has

blown

,

andslmul

-

Thls

device

may

be

furnished

with

any

trip

the

breaker

upon

the

blowing

of

any

one

taneously

holdtnc

the

breaker

in

the

trip

-

of

the

above

type

breakers

.

The

open

fuse

of

the

breaker

fuses

.

This

energizes

the

free

position

until

the

latch

closed

ax

mature

lockout

device

consists

of

3

separately

oper

-

coll

of

the

device

causing

the

armature

to

is

released

by

the

operating

oi

the

manual

aUd

devices

(

one

per

breaker

pole

)

each

engage

the

trip

paddle

,

thereby

tripping

the

reset

button

,

wired

in

parallel

to

corresponding

breaker

breaker

.

Once

operated

,

the

armature

te

fusee

.

These

devices

are

mounted

on

the

latched

in

the

closed

air

gap

.

position

MAINTENANCE

INSTRUCTIONS

Maintenance

Manual

Should

arc

quencher

barriers

or

contacts

be

eroded

to

half

their

original

thickness

BEFORE

INSPECTION

OR

ANY

MAIN

-

they

should

be

replaced

.

TENANCE

WORK

IS

DONE

,

BE

SURE

THAT

THE

BREAKER

IS

IN

THE

OPEN

POSI

-

TION

.

ALL

ELECTRICAL

POWER

,

BOTH

PRIMARY

AND

CONTROL

SOURCES

SHOULD

ALSO

BE

DISCONNECTED

.

INSPECTION

Breaker

Type

GEI

-

74602

AX

-

1

-

1

$

.

AK

-

l

/

IA

-

25

Man

.

Operated

,

GEI

-

74603

AK

-

1

-

15

,

AK

-

I

/

1

A

-

28

Elec

.

Operated

.

GEl

-

74623

AKF

~

IB

/

LA

-

25

Man

.

Oper

.

GEI

-

74624

AKF

-

1

B

/

1

A

-

26

Elec

.

Gper

,

GEl

-

50299

All

AK

-

2

/

2

A

-

L

5

/

25

,

AKU

-

2

/

2

A

-

25

All

AX

-

1

/

2

/

2

A

-

50

/

75

/

100

,

AKU

-

2

/

2

A

-

50

,

AK

-

2

/

2

A

-

50

fl

/

7

SS

/

l

00

S

,

AKF

-

1

C

/

2

C

/

1

D

/

2

D

/

2

E

LUBRICATION

In

general

,

the

circuit

breaker

re

-

quire

*

moderate

lubrication

.

Bearing

points

and

sliding

surfaces

should

be

lub

-

rtcated

at

the

regular

inspection

periods

with

a

thin

film

<

3

GE

Lubricant

D

50

H

15

*

.

.

Before

lubricating

remove

any

hardened

grease

and

dirt

from

latch

and

bearing

surf

ache

with

kerosene

,

ALL

.

EXCESS

LUBRICANT

SHOULD

BE

REMOVED

WITH

A

CLEAN

CLOTH

TO

AVOID

ANY

AC

-

Always

inspect

the

breaker

after

a

CUMULATION

OF

DIRT

OR

DUST

,

short

circuit

current

has

been

interrupted

.

Periodic

inspection

of

the

circuit

breaker

is

recommended

at

least

once

a

year

.

More

frequent

inspections

are

recom

-

mended

,

if

severe

load

conditions

,

dust

,

moisture

,

or

other

unfavorable

conditions

exist

.

GEI

-

74600

On

drawout

breakers

,

the

contact

sur

-

.

At

the

time

of

inspection

,

the

following

face

hi

the

disconnect

studs

should

be

checks

should

be

made

after

the

breaker

1

cleaned

and

greased

with

GE

Grease

Specif

t

-

has

been

de

-

energized

.

-

cation

D

50

H

47

.

X

.

Manually

operate

the

breaker

several

times

,

checking

for

obstructions

Or

excessive

friction

.

2

.

Electrically

operate

the

breaker

several

times

(

if

breaker

has

electrical

control

)

to

ascertain

whether

the

electrical

attachments

are

functioning

properly

.

3

.

Remove

the

arc

quenchers

by

re

-

moving

the

channel

shaped

retaining

bar

.

4

.

Inspect

arc

quenchers

and

contacts

for

breakage

or

excessive

burning

.

These

instructions

have

as

their

pur

-

pose

the

imparting

of

Information

of

a

general

nature

concerning

the

installation

and

operation

of

Type

AK

power

circuit

breakers

.

If

more

complete

and

specific

Information

is

required

,

such

as

might

be

needed

for

overhauling

the

breaker

,

trouble

shorting

,

or

replacing

parts

of

the

breaker

,

refer

to

the

complete

Instruction

for

the

particular

breaker

,

type

involved

.

These

are

:

Renewal

parts

bulletins

for

the

various

types

oLbreakers

are

:

Bulletin

Breaker

Type

AK

-

1

-

15

/

25

and

AKF

-

1

B

AK

-

1

-

50

up

to

and

including

dash

9

AK

-

1

-

75

/

100

AK

-

2

-

15

-

25

AK

-

1

-

60

-

10

-

U

and

AK

-

2

-

W

GEF

-

3506

GEF

-

3878

GEF

-

3879

GEF

-

4149

GEF

-

4

X

50

GENERAL

ELECTRIC

COMPANY

,

PHILADELPHIA

,

PA

.

3

-

65

'

/

if

i

.

-

.

r

L

:

Courtesy of NationalSwitchgear.com