Ge Ml-14-0 User manual

INSTRUCTIONS

GEK

7153

c

SUPERSEDES

GEK

-

7163

F

SPRING

-

CHARGED

OPERATING

MECHANISM

t

TYPE

ML

-

14

-

0

r

.

i

FOR

&

<

OIL

-

BLAST

CIRCUIT

BREAKERS

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CONTENTS

Introduction

.

Receiving

,

Handling

and

Storage

,

.

Description

.

Installation

.

Operation

.

Maintenance

.

Replacement

Parts

3

)

3

5

22

25

33

;

GENERAL

ELECTRIC

Courtesy of NationalSwitchgear.com

GEK

7153

Spring

-

charged

Operating

Mechanism

Type

ML

-

14

-

0

*

—

——

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CIRCUIT

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Close

Control

Power

-

Fused

Disconnect

Switch

Heater

Power

-

Fused

Disconnect

Switch

Trip

Control

Power

-

Fused

Disconnect

Switch

Recloser

Cut

-

out

Switch

Oil

Circuit

Breaker

8

C

Permissive

Control

Switch

Opened

by

manual

tripping

device

on

the

mechanism

-

Hand

Reset

to

Close

ACR

Recloser

Interlocking

Relay

and

Contacts

for

79

Recloser

Timing

Motor

Clutch

Release

Unit

and

Contacts

for

79

Anti

-

pump

Unit

and

Contacts

for

79

69

8

H

8

T

79

E

?

43

A

M

i

52

R

V

Normally

Open

Auxiliary

Switch

-

Open

when

52

is

open

Normally

Closed

Auxiliary

Switch

-

Closed

when

52

is

open

Closing

Coil

Control

Switch

Z

a

•

ft

i

b

CC

cs

CL

/

MS

Closing

Latch

Monitoring

Switch

lc

Trip

Latch

Checking

Switch

M

Spring

-

charging

Motor

SM

/

LS

Limit

Switch

for

Spring

-

charging

Motor

TC

Trip

Coil

FU

Fuse

Green

Indicating

Lamp

Heater

Resistor

Red

Indicating

Lamp

Protective

Device

G

HTR

RES

R

Anti

-

pump

Auxiliary

Relay

Y

PD

Fig

.

1

Typical

Connection

Diagram

Breaker

Position

-

Open

Closing

Springs

—

Discharged

(

For

actual

wiring

see

connection

diagram

furnished

with

equipment

)

u

2

Courtesy of NationalSwitchgear.com

SPRING

-

CHARGED

OPERATING

MECHANISM

TYPE

ML

»

14

~

©

INTRODUCTION

operating

equipment

are

enclosed

in

a

weatherproof

housing

designed

for

mount

-

ing

on

the

front

end

of

the

breaker

.

D

-

c

voltage

is

required

for

the

control

circuit

.

OPERATION

.

The

following

instructions

A

-

c

voltage

is

recommended

for

the

will

provide

information

for

placing

the

spring

-

charging

motor

and

required

for

mechanism

and

breaker

in

service

and

for

the

heater

circuits

.

Since

the

control

the

necessary

maintenance

.

It

should

be

circuit

requires

very

low

operating

cur

-

kept

in

mind

that

the

illustrations

in

the

rents

,

the

.

necessity

for

large

storage

instruction

book

are

for

illustrative

pur

-

batteries

or

rectifiers

is

eliminated

,

poses

and

may

not

always

be

an

actual

Batteries

are

recommended

for

the

d

-

c

picture

of

the

equipment

being

furnished

,

source

.

The

mechanism

and

its

accessories

For

final

information

always

refer

to

the

will

operate

at

the

standard

ANSI

voltage

drawings

that

are

furnished

separately

ratings

.

The

breaker

nameplate

is

with

the

equipment

.

For

additional

mounted

on

the

inside

of

the

front

door

of

the

mechanism

housing

.

PROPER

INSTALLATION

AND

MAINTENANCE

ARE

NECESSARY

FOR

CONTINUED

SATISFACTORY

The

Type

ML

-

14

-

0

operator

is

a

spring

operated

mechanism

for

outdoor

oil

-

blast

circuit

breakers

.

It

is

designed

for

high

speed

operation

during

the

circuit

breaker

interruption

of

faults

and

high

speed

reclosing

.

It

is

mechanically

trip

-

free

and

non

-

pumping

when

closed

on

short

circuits

.

Its

high

speed

characteristic

is

the

result

of

a

simple

,

ingenious

,

rugged

linkage

design

having

low

-

friction

bear

-

ings

.

instructions

on

the

circuit

breaker

,

refer

to

the

breaker

instruction

book

.

mechanism

and

associated

The

RECEIVING

,

HANDLING

AND

STORAGE

Each

mechanism

is

carefully

in

-

removed

carefully

using

a

nail

puller

,

to

prevent

rusting

.

If

stored

for

any

spected

and

packed

by

workmen

exper

-

Check

all

parts

against

the

packing

list

to

length

of

time

,

periodic

inspections

fenced

in

the

proper

handling

and

packing

make

certain

that

no

parts

have

been

should

be

made

to

see

that

corrosion

has

of

electrical

equipment

.

Immediately

overlooked

while

unpacking

.

Always

not

taken

place

and

to

insure

good

mech

-

upon

receipt

of

a

mechanism

,

an

examin

-

search

the

packing

material

for

hardware

anical

condition

.

If

possible

,

the

space

ation

should

be

made

for

any

damage

that

may

have

loosened

in

transit

,

sustained

during

shipment

.

If

injury

or

rough

handling

is

evident

,

a

damage

claim

should

be

filed

with

the

transportation

company

,

and

the

nearest

General

Elec

-

in

the

proper

location

immediately

,

and

it

trie

Apparatus

Sales

Office

should

be

is

necessary

to

store

the

equipment

,

it

under

unfavorable

atmospheric

condi

-

promptly

notified

.

©

heater

should

be

energized

to

prevent

moisture

condensation

inside

the

mech

-

anism

housing

.

If

the

mechanism

cannot

be

installed

Should

the

mechanism

be

stored

should

be

kept

in

a

clean

,

dry

place

pro

-

tions

,

steps

should

be

taken

to

dry

out

tected

from

mechanical

injury

.

Machined

the

mechanism

before

it

is

placed

in

The

crating

or

boxing

must

be

parts

should

be

coated

heavily

with

grease

service

DESCRIPTION

located

a

motor

for

charging

the

closing

springs

,

closing

spring

’

s

operating

mech

-

The

control

house

for

this

mech

-

anism

,

auxiliary

switch

and

the

control

anism

is

a

steel

weatherproof

house

panel

with

its

relaying

,

operating

and

which

contains

a

felt

strip

as

a

sealant

control

switches

and

BCT

terminal

around

the

doors

.

Inside

this

housing

are

boards

.

The

ML

-

14

spring

-

charged

operator

consists

of

motor

operated

closing

springs

with

the

associated

mechanism

and

control

equipment

.

The

unit

is

designed

to

operate

large

outdoor

oil

circuit

break

-

ers

with

provision

for

closing

,

opening

,

trip

-

free

and

reclosing

operations

These

instructions

do

not

purport

to

cover

all

details

or

variations

in

equipment

nor

to

provide

for

every

possible

contingency

to

be

met

in

connection

with

installation

,

operation

or

maintenance

.

further

information

be

desired

or

should

particular

problems

arise

which

are

not

cove

2

:

ed

sufficiently

for

the

purchaser

’

s

purposes

,

the

matter

should

be

referred

to

the

General

Electric

Company

.

©

Should

To

the

extent

required

the

products

described

herein

meet

applicable

ANSI

,

IEEE

and

NEMA

standards

;

.

but

no

sticb

assurance

is

given

with

respect

to

local

codes

and

ordinances

because

they

vary

greatly

.

3

Courtesy of NationalSwitchgear.com

GEK

7153

Spring

-

charged

Operating

Mechanism

Type

ML

-

14

-

0

-

53

'

I

MULTI

wmsn

,

;

z

ITW

M

*

K

>

<

it

*

“

•

N

'

:

A

ifoin

—

Ifni

--

l

-

7

9

/

-

s

ON

5

s

GO

<

N

ob

E

23

.

Closing

Latch

Monitoring

Switch

Operating

Lever

Manual

Close

Push

Rod

Button

Eccentric

Manual

Charging

Stud

(

5

/

8

inch

hex

)

Driving

Link

Right

Closing

Spring

Breaker

Nameplate

Current

Transformer

Nameplate

Driving

Chain

Heater

Charge

-

discharge

Indicator

Window

Closing

Spring

Blocking

Device

Operation

Counter

Trip

Coil

(

52

TC

)

Operation

Counter

Window

Lock

-

out

Switch

(

69

Device

)

Bushing

Current

Transformer

Terminal

Boards

Manual

Trip

Lever

Trip

Latch

Roller

Manual

Trip

Push

Button

Ratchet

Wheel

13

.

1

.

House

Support

Bracket

2

.

Breaker

Vertical

Operating

Rod

3

.

Auxiliary

Switch

4

.

Output

Crank

5

.

Prop

Reset

Spring

6

.

Trip

Latch

7

.

Charge

-

discharge

Indicator

8

.

Guide

Block

9

.

Motor

Limit

Switches

10

.

Latch

Checking

Switch

11

.

Spring

-

charging

Motor

12

.

Left

Closing

Spring

14

.

24

.

15

.

25

,

16

.

26

.

17

.

27

.

28

.

18

.

29

.

30

.

19

.

31

.

20

.

32

.

21

.

33

.

22

.

i

Fig

.

2

Front

View

of

Mechanism

4

Courtesy of NationalSwitchgear.com

Spring

-

charged

Operating

Mechanism

Type

ML

-

14

-

0

GEK

7153

Remove

the

wax

NOTE

:

paper

strips

which

are

be

-

tween

the

door

jam

and

the

doors

of

the

control

house

is

either

ac

or

d

-

e

,

but

preferably

a

-

c

.

when

in

use

.

NEVER

AT

-

TEMPT

SLOW

MANUAL

CLOSING

WITH

THE

BLOCKING

DEVICE

IN

PLACE

AND

THE

BREAK

-

ER

IN

SERVICE

.

OPERATE

SLOWLY

AND

MANUALLY

ONLY

WHEN

THE

BREAK

-

ER

HAS

BEEN

COMPLETE

-

LY

DEENERGIZED

AND

ISOLATED

.

f

)

Also

provided

on

the

equipment

is

a

manual

trip

device

.

This

consists

of

a

mechanism

for

manually

tripping

the

breaker

and

a

lock

-

out

switch

for

opening

the

closing

circuit

,

io

prevent

the

breaker

from

closing

from

a

remote

source

when

it

is

tripped

by

this

mechanism

locally

.

before

energizing

the

heater

.

These

strips

are

for

paint

pro

-

tection

during

shipment

and

will

not

make

a

good

weather

seal

if

left

in

place

.

Control

voltages

are

given

on

the

nameplate

.

The

motor

operating

voltage

NOTE

:

This

mechanism

is

designed

for

electrical

closing

INSTALLATION

During

the

installation

of

the

mech

-

obtain

the

correct

alignment

of

the

ver

-

anism

,

it

is

necessary

to

make

reference

tical

rod

and

its

cover

pipe

,

to

the

instruction

book

for

the

oil

circuit

breaker

that

it

operates

.

Use

control

wiring

of

adequate

size

so

that

with

full

operating

current

flow

-

ing

to

the

operating

mechanism

,

the

voltage

across

the

terminals

of

tire

mech

-

anism

will

be

within

the

limits

specified

as

standard

for

the

range

of

control

voltage

.

Raise

the

mechanism

with

a

crane

and

align

the

mounting

stud

holes

in

the

The

mechanism

and

housing

are

mechanism

housing

to

those

on

the

normally

shipped

fastened

directly

to

the

breaker

framework

and

insert

the

studs

,

frame

of

the

oil

circuit

breaker

.

The

Tighten

all

nuts

securely

and

lock

with

mechanism

is

installed

and

properly

ad

-

set

screws

.

Use

the

proper

connection

diagram

justed

when

received

.

The

trip

latches

are

*

for

each

individual

job

for

testing

and

fastened

during

shipment

and

this

fasten

-

Install

the

vertical

operating

rod

making

connections

.

The

mechanism

is

ing

should

be

removed

after

the

breaker

cover

pipe

between

the

front

crank

cover

wired

completely

at

the

factory

to

has

been

moved

into

position

.

support

and

the

top

of

the

mechanism

terminal

boards

mounted

on

the

bottom

housing

.

Sometimes

it

is

convenient

to

of

the

control

panel

.

Incoming

conduits

install

this

cover

pipe

prior

to

raising

the

can

be

terminated

in

a

removable

plate

in

housing

into

position

on

the

breaker

If

the

mechanism

and

housing

are

tank

.

the

vertical

operating

shipped

separately

,

or

the

mechanism

and

ro

(

j

,

The

length

of

the

operating

rod

housing

have

been

removed

from

the

be

adjusted

by

means

of

right

-

and

left

-

breaker

for

shipment

,

then

it

is

necessary

hand

threaded

couplings

on

the

ends

to

fasten

the

mechanism

and

housing

in

obtain

the

required

breaker

adjustment

position

.

MOUNTING

the

housing

floor

directly

under

the

terminal

boards

.

This

plate

can

be

drilled

to

suit

any

conduit

requirements

.

It

is

recommended

that

all

conduits

entering

the

mechanism

housing

be

sealed

off

at

their

entrances

to

the

housing

.

can

,

as

described

in

the

breaker

instruction

book

.

ADJUSTMENTS

The

breaker

frame

to

which

the

oper

-

ating

mechanism

is

to

be

mounted

should

first

be

plumb

.

This

procedure

is

described

in

the

breaker

instruction

book

.

By

mounted

,

electrical

connections

can

be

placing

a

plumbed

straight

edge

extending

made

.

Before

making

these

,

precautions

from

top

to

bottom

against

the

mech

-

should

be

taken

to

see

that

all

leads

to

be

anism

mounting

pads

on

the

breaker

connected

to

the

mechanism

are

de

-

framework

,

determine

the

amount

of

energized

,

shim

washers

needed

to

make

them

all

flush

.

To

this

amount

add

an

equal

number

of

shims

to

each

of

the

pads

so

as

it

is

practicable

.

Control

wires

must

be

that

there

is

a

nominal

one

-

quarter

inch

run

separately

and

remote

from

high

thickness

of

shims

.

A

single

brass

washer

tension

leads

and

not

in

the

same

duct

or

is

to

be

placed

between

the

steel

washers

parallel

to

high

tension

leads

unless

the

and

the

mechanism

housing

and

against

distance

separating

the

two

sets

of

wiring

the

gasket

for

more

effective

sealing

is

sufficient

to

prevent

posssible

commun

-

against

the

entrance

of

water

.

It

may

be

ication

between

them

as

a

result

of

short

necessary

to

add

or

remove

steel

shims

to

circuits

.

CONNECTIONS

Although

the

mechanism

has

been

adjusted

and

tested

at

the

factory

,

it

is

advisable

to

check

all

the

following

points

as

well

as

those

listed

under

FINAL

INSPECTION

to

be

sure

that

no

change

has

occurred

during

shipment

and

instal

-

lation

.

No

adjustments

should

be

altered

unless

this

inspection

indicates

it

is

neces

-

sary

.

9

After

the

mechanism

has

been

Rim

control

wires

in

conduit

insofar

Use

manual

operation

for

all

pre

-

liminary

inspection

.

After

the

mechanism

is

connected

to

the

breaker

,

operate

it

slowly

to

see

that

the

operation

is

smooth

throughout

the

closing

stroke

,

that

no

binding

occurs

,

and

that

no

excessive

play

o

5

Courtesy of NationalSwitchgear.com

GEK

7153

Spring

-

charged

Operating

Mechanism

Type

ML

-

14

-

0

When

the

springs

have

reached

the

Fig

.

2

,

no

longer

is

advanced

.

The

closing

fully

charged

position

the

indicator

(

7

)

}

spring

blocking

device

(

13

)

,

Fig

.

2

,

can

Fig

.

2

,

will

read

“

CHARGED

”

,

and

the

now

be

removed

,

DO

NOT

OPERATE

driving

pawl

(

4

)

,

Fig

.

5

,

will

be

raised

OR

PUSH

THE

MANUAL

CLOSE

BUT

-

from

the

ratchet

wheel

teeth

,

Additional

TON

(

24

)

,

FIG

.

2

,

WHILE

THE

BREAK

-

turning

of

the

eccentric

will

not

advance

ER

IS

IN

THE

CLOSED

POSITION

,

the

ratchet

wheel

.

The

latching

and

safety

Damage

to

the

linkage

,

ratchet

wheel

and

pawls

(

16

)

,

Fig

,

3

,

work

in

conjunction

pawls

might

occur

,

This

damage

would

be

with

the

driving

pawl

(

4

)

,

Fig

.

5

,

to

pre

-

caused

by

the

energy

of

the

springs

not

vent

the

ratchet

wheel

(

73

)

,

Fig

.

10

,

from

being

absorbed

by

the

mechanism

linkage

turning

backwards

due

to

the

force

of

the

and

breaker

in

the

spring

hitting

a

station

-

closing

springs

as

the

ratchet

wrench

(

7

)

,

ary

linkage

instead

of

pushing

a

movable

Fig

.

5

,

is

operated

.

linkage

.

Insert

the

spring

blocking

device

bar

(

13

)

,

Fig

.

2

,

into

both

springs

and

man

-

ually

discharge

the

springs

against

the

pins

by

pushing

the

manual

close

button

(

24

)

,

Fig

.

2

.

The

springs

are

now

blocked

and

slow

closing

of

the

breaker

contacts

can

be

accomplished

by

again

turning

the

driving

eccentric

with

a

5

/

8

ratchet

wrench

.

is

noticeable

between

parts

.

Electrical

operation

should

be

attempted

only

after

it

is

certain

that

all

mechanism

adjust

-

ments

are

made

correctly

and

that

the

oil

circuit

breaker

is

correctly

adjusted

according

to

its

instructions

.

The

breaker

and

mechanism

adjust

-

ments

must

be

checked

when

the

mech

-

anism

is

being

manually

closed

since

the

mechanism

can

only

be

operated

slowly

in

the

closing

direction

.

UNDER

NO

CIRCUMSTANCES

SHOULD

THE

BREAKER

BE

TRIPPED

MANUALLY

OR

ELECTRICALLY

WITHOUT

OIL

IN

THE

TANKS

UNTIL

THE

PROPER

BREAKER

INSTRUC

-

TION

BOOK

HAS

BEEN

CHECKED

TO

DETERMINE

WHETHER

OR

NOT

THE

BREAKER

CAN

BE

OPERATED

WITH

-

OUT

OIL

IN

THE

TANKS

.

Operate

the

circuit

breaker

electri

-

cally

several

times

.

Check

the

control

voltage

as

described

under

CONTROL

POWER

CHECK

.

NOTE

:

If

the

breaker

sec

-

ondary

wiring

is

to

be

given

a

hi

-

potential

test

at

1500

volts

a

-

c

,

remove

both

the

major

leads

from

the

terminal

con

-

nection

.

Failure

to

disconnect

the

motor

from

the

circuit

may

cause

damage

to

the

winding

insulation

.

The

spring

blocking

device

is

made

to

extend

out

the

right

door

and

must

be

removed

in

order

to

close

the

door

.

This

is

to

prevent

leaving

the

mechanism

blocked

accidentally

after

maintenance

.

Each

mechanism

is

furnished

with

a

blocking

device

and

should

remain

in

the

bottom

of

the

house

since

the

spring

centers

may

differ

from

unit

to

unit

.

Manual

operation

of

the

mechanism

should

not

be

attempted

until

the

bearing

surfaces

of

the

mechanism

have

been

checked

for

lubrication

.

Refer

to

the

section

on

lubrication

for

the

proper

oils

and

greases

.

TRIP

LATCH

WIPE

MANUAL

OPENING

Refer

to

Fig

.

10

and

to

“

U

”

,

Fig

.

13

,

The

wipe

of

the

trip

latch

(

50

)

,

Fig

.

10

,

on

the

trip

latch

roller

(

52

)

should

be

from

3

/

16

inch

to

1

/

4

inch

.

This

can

be

measured

by

putting

a

film

of

grease

on

the

latch

(

50

)

,

closing

the

breaker

part

The

breaker

can

be

tripped

manually

by

operating

the

manual

trip

level

(

4

)

,

Fig

.

3

.

This

will

give

an

opening

operation

very

similar

to

that

obtained

.

when

the

breaker

is

tripped

electrically

,

The

break

-

er

cannot

be

opened

slowly

,

except

with

an

optional

maintenance

jacking

device

.

During

the

slow

closing

operation

check

to

insure

that

the

mechanism

does

not

stick

or

bind

during

the

entire

stroke

,

that

it

latches

securely

in

the

closed

position

,

and

that

it

trips

freely

when

the

way

,

and

tripping

.

The

mechanism

has

manual

trip

lever

(

19

)

,

Fig

,

2

,

is

operated

,

the

proper

trip

latch

wipe

when

the

latch

The

breaker

should

not

be

operated

elec

-

rests

against

the

stop

(

53

)

.

No

adjust

-

fcricaUy

until

it

has

been

operated

several

ment

is

provided

and

a

visual

inspection

is

times

manually

to

insure

freedom

of

usually

all

that

is

required

.

If

this

setting

action

.

At

this

time

,

also

check

the

is

not

correct

,

look

for

insufficient

travel

breaker

adjustments

as

given

in

the

of

the

trip

shaft

(

24

)

,

breaker

instruction

book

.

MANUAL

CLOSING

DISCONNECT

THE

POWER

TO

THE

SPRING

-

CHARGING

MOTOR

TO

PREVENT

ITS

OPERATION

BEFORE

OPERATING

THE

BREAKER

MANU

-

ALLY

AND

ALSO

BEFORE

MAN

-

UALLY

CHARGING

THE

CLOSING

SPRINGS

.

To

operate

the

mechanism

manually

charge

the

breaker

closing

springs

(

12

)

and

(

28

)

,

Fig

.

2

,

manually

using

a

5

/

8

inch

ratchet

wrench

on

the

manual

charg

-

ing

stud

(

26

)

,

Fig

.

2

,

to

turn

the

driving

eccentric

'

(

25

)

,

Fig

.

2

.

Turning

the

driving

e

c

e

n

t

r

i

c

coun

te

rcl

oc

kwise

(

pu

shin

g

downward

on

the

ratchet

wrench

)

,

will

advance

the

ratchet

wheel

(

22

)

and

com

-

•

*

'

press

the

closing

springs

.

WHEN

WORKING

ON

THE

MECH

-

ANISM

IN

THE

CLOSED

POSITION

,

KEEP

FINGERS

CLEAR

OF

THE

LINK

-

AGE

,

AS

ACCIDENTAL

TRIPPING

CAN

CAUSE

SEVERE

INJURY

.

Use

the

trip

latch

blocking

tool

which

is

inserted

in

the

trip

latch

block

-

ing

hole

(

100

)

,

Fig

.

9

and

Fig

.

12

and

(

24

)

,

Fig

,

3

,

until

it

extends

beyond

the

opposite

frame

.

DO

NOT

WORK

ON

EITHER

THE

BREAKER

OR

MECHANISM

UNLESS

THE

CLOSING

SPRINGS

AND

TRIP

-

LATCIi

ARE

BLOCKED

.

THIS

PRE

-

CAUTION

IS

REQUIRED

TO

PREVENT

ACCIDENTAL

CLOSING

OR

TRIP

-

PING

.

USE

THE

69

LOCK

-

OUT

SWITCH

IF

REMOTE

CONTROL

IS

USED

.

After

the

adjustments

have

been

checked

,

the

springs

can

be

unblocked

.

Rotate

the

driving

eccentric

(

25

)

,

Fig

.

2

,

until

the

indicator

(

7

)

,

Fig

.

2

,

reads

“

CHARGED

”

and

the

ratchet

wheel

(

22

)

,

13

,

and

“

N

”

,

Fig

.

14

.

With

the

breaker

in

TRIP

LATCH

CLEARANCE

-

rc

Refer

to

Fig

,

12

,

and

to

“

R

”

,

Fig

,

6

Courtesy of NationalSwitchgear.com

Spring

-

charged

Operating

Mechanism

Type

ML

-

14

-

0

GEK

7153

will

lock

the

eccentric

.

Tighten

the

lock

-

nuts

on

the

eccentric

after

adjusting

the

eccentric

.

o

PROP

CLEARANCE

Refer

to

(

38

)

,

Fig

.

10

,

and

to

“

V

”

Fig

.

13

.

With

the

breaker

closed

as

far

as

possible

,

that

is

,

with

the

springs

(

79

)

,

and

(

62

)

,

Fig

.

11

,

blocked

and

the

cam

(

39

)

,

Fig

.

10

,

rotated

so

that

the

cam

follower

roller

shaft

(

68

)

is

at

its

maxi

-

mum

height

over

the

prop

(

38

)

,

the

clear

-

ance

between

the

prop

and

cam

shaft

should

be

1

/

16

inch

to

5

/

32

inch

.

No

adjustment

is

provided

and

a

visual

inspection

is

usually

all

that

is

required

.

:

-

.

v

k

:

-

(

i

*

14

16

17

5

24

PROP

WIPE

ON

7

<

N

s

00

Refer

to

Fig

.

10

and

“

K

”

,

Fig

.

13

.

With

the

breaker

closed

and

the

linkage

resting

on

the

closing

prop

(

38

)

,

Fig

.

10

,

the

prop

wipe

should

be

3

/

16

inch

to

3

/

8

inch

from

the

cam

follower

roller

shaft

(

68

)

,

Fig

.

10

,

to

the

edge

of

the

prop

.

No

adjustment

is

provided

and

a

visual

inspection

is

usually

all

that

is

required

.

3

CO

00

U

,

12

CLOSING

LATCII

WIPE

13

Refer

to

Fig

.

9

and

to

UX

”

Fig

.

15

.

The

wipe

between

the

closing

latch

(

8

)

and

the

closing

latch

roller

(

29

)

should

be

3

/

16

inch

to

1

/

4

inch

.

If

resetting

is

required

,

loosen

,

set

,

and

retighten

the

adjustment

screw

(

10

)

,

then

tighten

the

locking

nut

(

11

)

.

1

.

Mechanism

House

2

.

House

Support

Bracket

3

.

Lock

-

out

Device

(

69

Switch

)

4

.

Manual

Trip

Lever

5

.

Manual

Trip

Push

Rod

6

.

Trip

Latch

Clearance

Adjustment

Eccentric

1

,

.

^

Manual

Close

Push

Rod

8

,

Eccentric

9

.

Manual

Charging

Stud

.

(

5

/

8

inch

hex

)

10

.

Driving

Link

11

.

Right

Closing

Spring

12

.

Closing

Spring

Blocking

Device

13

.

Access

Plate

(

Customer

’

s

Wiring

)

14

.

Output

Crank

Main

Shaft

15

.

Output

Coupling

16

.

Latching

And

Safety

Pawls

17

.

Ratchet

Wheel

18

.

CamShaft

19

.

Guide

Block

20

.

Closing

Coil

(

52

CC

)

21

.

Closing

Coil

Plunger

Instruction

Book

23

.

Weatherstrip

24

.

Trip

Latch

Blocking

CLOSING

LATCH

MONITORING

SWITCH

Refer

to

Fig

.

9

and

to

“

T

”

,

Fig

.

13

.

The

closing

latch

(

8

)

must

be

fully

reset

and

the

closing

latch

monitoring

switch

(

16

)

operated

before

the

motor

(

34

)

will

start

.

The

closing

latch

monitoring

switch

should

be

wiped

by

the

operating

lever

(

23

)

,

Fig

.

2

,

so

that

the

clearance

be

-

tween

the

operating

lever

and

the

switch

mounting

bracket

(

8

)

,

Fig

.

6

,

is

0.005

to

0.032

inch

.

To

obtain

this

adjustment

bend

the

monitoring

switch

operating

the

tripped

position

and

the

closing

locknut

(

84

)

,

Fig

.

12

,

at

the

trip

latch

Jcver

as

necessary

.

Be

sure

the

latch

is

springs

(

12

)

and

(

28

)

,

Fig

.

2

,

charged

,

clearance

adjustment

eccentric

(

6

)

,

Fig

.

3

,

reset

before

making

any

ad

-

check

the

clearance

between

the

trip

with

the

breaker

in

the

tripped

position

,

justments

.

latch

(

50

)

,

Fig

.

11

,

and

the

trip

latch

Adjust

the

eccentric

(

25

)

,

Fig

.

2

,

as

neces

-

roller

(

52

)

,

It

should

measure

1

/

32

inch

sary

.

Adjust

the

trip

latch

clearance

by

to

3

/

32

inch

.

turning

the

eccentric

in

a

clockwise

direc

-

~

.

,

.

,

t

tion

while

decreasing

the

clearance

.

This

To

change

the

adjustment

loosen

the

22

.

Fig

.

3

Right

Side

View

of

Mechanism

MOTOR

LIMIT

SWITCHES

Refer

to

Fig

.

9

and

to

“

Z

”

,

Fig

.

15

.

With

the

closing

springs

blocked

rotate

7

Courtesy of NationalSwitchgear.com

GEK

7153

Spring

-

charged

Operating

Mechanism

Type

ML

-

14

-

0

X

-

fnmJi

/

-

T

\

<

N

PO

w

.

Trip

Latch

Checking

Switch

Trip

Latch

Shaft

Charge

-

discharge

Indicator

Linkage

Charge

-

discharge

Indicator

Switch

Support

Bolts

Motor

Limit

Switch

Support

Motor

Limit

Switches

Motor

Limit

Switch

Striker

Closing

Latch

Control

Panel

Control

House

Heater

Circuit

Fused

Pullout

Cutoff

and

Anti

-

pump

Relay

(

52

Y

)

Trip

Latch

Blocking

Motor

Circuit

Fused

Pullout

(

When

Required

)

19

.

20

.

21

.

1

,

Output

Coupling

2

*

Limit

Switch

Cam

3

.

CamShaft

4

.

Closing

Circuit

'

Fused

Pullout

5

.

Trip

Circuit

Fused

Pullout

6

.

Terminal

Boards

7

.

Control

House

Heater

8

.

House

Support

Bracket

9

.

Auxiliary

Switch

10

.

Prop

Reset

Spring

Fig

.

4

Left

View

of

Mechanism

22

.

23

.

24

,

8

Courtesy of NationalSwitchgear.com

Spring

charged

Operating

Mechanism

Type

ML

-

14

-

0

GEK

7153

Ui

%

u

«

.•

:

w

.

\

'

.

s

*

>

.

>

••

.

*

:

vr

•

r

V

-

’

*

/

-

*

N

00

<

N

s

00

W

>

*

3

*

/

*

-

V

v

.

'

•

C

:

>

s

-

r

-

<

»

.

^

-

0

••

-

X

*

-

I

.

Manual

Close

Push

Rod

Spring

-

charging

Motor

Ratchet

Wheel

Driving

Pawl

Motor

Mounting

Bolts

1

.

6

.

Eccentric

7

.

Manual

Charging

Stud

(

5

/

8

Inch

Hex

)

8

.

Driving

Link

9

.

Motor

Support

and

Bearing

Housing

2

.

3

.

4

.

5

.

Fig

,

5

Driving

Elements

9

Courtesy of NationalSwitchgear.com

GEK

7153

Spring

-

charged

Operating

Mechanism

Type

ML

-

14

-

0

W

o

oo

ON

CO

'

w

'

NO

oh

>

«

*

r

1

-

~

'

V

*

«

.

$

)

6

.

Manual

Charging

Stud

and

Wrench

7

.

Driving

Link

8

.

Monitoring

Switch

Mounting

Bracket

9

.

Closing

Coil

(

52

CC

)

10

,

Closing

Coil

Plunger

1

.

Motor

Support

Bolts

2

.

Driving

Motor

3

.

Closing

Latch

Monitoring

Switch

4

.

Ratchet

Wheel

5

.

Eccentric

Fig

.

6

Closing

Devices

is

closed

,

No

adjustment

is

provided

and

a

visual

inspection

is

usually

all

that

is

required

.

If

for

some

reason

the

auxiliary

switch

is

removed

it

must

be

properly

reinstalled

.

The

“

V

”

stamped

on

the

SB

*

12

auxiliary

switch

shaft

must

point

toward

the

switch

terminals

or

180

degrees

away

from

the

terminals

to

pre

-

vent

overlap

of

the

contacts

.

If

“

a

”

and

“

b

”

contacts

overlap

somewhat

during

the

breaker

stroke

the

auxiliary

switch

is

assembled

incorrectly

and

must

be

properly

reset

,

Remove

the

switch

oper

-

ator

from

the

square

shaft

.

Rotate

the

square

shaft

until

the

arrow

on

the

end

of

the

shaft

is

pointing

toward

the

upper

front

corner

of

the

switch

mounting

plate

with

the

breaker

in

the

open

position

.

Install

the

switch

operator

and

make

certain

there

is

no

overlap

between

the

“

a

”

and

“

b

”

contacts

during

the

breaker

stroke

.

er

stroke

is

increased

by

lowering

the

dashpots

and

/

or

the

toggle

setting

at

its

minimum

(

FKA

)

and

/

or

internal

stops

at

their

minimums

(

FK

)

and

/

or

shortening

of

the

vertical

operating

rod

.

AUXILIARY

SWITCH

-

TYPE

SB

-

12

Refer

to

Fig

.

11

and

to

“

L

”

,

Fig

.

15

.

The

auxiliary

switch

(

19

)

,

Fig

.

11

,

is

mounted

on

the

left

side

of

the

operating

mechanism

frame

(

2

)

.

The

linkage

(

59

)

attached

to

the

(

40

)

,

Fig

.

10

,

of

the

output

crank

(

4

)

operates

the

auxiliary

switch

shaft

which

opens

and

closes

the

“

a

”

and

"

b

”

contacts

.

The

“

a

”

contacts

are

open

when

the

breaker

is

open

and

the

“

b

”

contacts

are

open

when

the

breaker

is

closed

.

The

“

a

”

contacts

need

only

to

be

checked

to

make

certain

they

are

open

when

the

breaker

is

open

.

The

“

b

”

contacts

need

only

to

be

checked

to

see

that

they

are

open

when

the

breaker

the

switch

cam

(

6

)

until

the

motor

limit

switch

striker

(

26

)

has

traveled

the

maximum

amount

(

about

180

degrees

rotation

of

the

cam

)

.

Loosen

the

mounting

bolt

(

28

)

and

rotate

the

switch

support

(

16

)

,

Fig

.

4

,

until

the

gap

be

-

tween

the

motor

limit

switch

striker

(

26

)

,

Fig

.

9

,

and

the

switch

support

(

16

)

,

Fig

.

4

,

is

0.032

to

0.005

inch

.

CLOSING

CAM

CLEARANCE

Refer

to

Fig

.

18

.

The

sum

of

"

C

”

plus

“

R

”

should

not

exceed

0

,

170

inch

.

This

clearance

is

affected

by

the

adjust

-

ment

of

the

breaker

opening

dashpots

,

toggle

setting

(

FKA

)

,

internal

stops

(

FK

)

,

and

vertical

operating

rod

length

.

Normal

-

ly

no

adjustment

is

required

;

however

,

this

clearance

should

be

checked

if

the

breaker

settings

are

changed

,

The

closing

cam

clearance

is

reduced

when

the

break

-

10

Courtesy of NationalSwitchgear.com

Spring

-

charged

Operating

Mechanism

Type

ML

-

14

-

0

GEK

7153

sss

2

-

0

3

oo

VO

Oo

Q

u

>

O

'

w

'

6

7

8

Operation

Counter

Main

Output

Crank

Trip

Coil

Plunger

Trip

Latch

Checking

Switch

Trip

Latch

Checking

Switch

Operating

Lever

Trip

Shaft

Retaining

Cotter

Trip

Latch

Trip

Latch

Stop

Trip

Coil

Support

Bracket

1

.

Trip

Coil

Positioning

Shims

Trip

Coil

Trip

Coil

Positioning

Shims

Lock

-

out

Device

(

69

Switch

)

Trip

Coil

Link

Trip

Crank

Trip

Crank

Adjustment

Bolt

Manual

Trip

Lever

Trip

Latch

Shaft

Trip

Latch

Set

Screw

10

.

2

.

11

.

3

.

12

.

4

.

13

.

5

.

14

.

15

.

6

.

16

.

7

.

17

.

8

.

18

.

9

.

19

.

Fig

.

7

Tripping

Devices

11

Courtesy of NationalSwitchgear.com

GEK

7153

Spring

-

charged

Operating

Mechanism

Type

ML

-

14

-

0

6

.

Closing

Latch

7

.

Control

Panel

Shock

Mount

8

.

Charge

-

discharge

Indicator

Linkage

9

.

Charge

-

discharge

Indicator

10

.

Motor

Limit

Switch

Striker

11

.

Charging

Motor

Limit

Switches

12

.

Motor

Lead

Terminal

Board

13

.

Control

Wiring

14

.

Spring

-

charging

Motor

1

.

Limit

Switch

Cam

2

.

CarnShaft

3

.

Guide

Block

4

.

Closing

Latch

Roller

5

.

Closing

Latch

Shaft

Fig

.

8

A

Closing

Latch

and

Motor

Control

DRIVING

AND

LATCHING

PAWL

ADJUSTMENT

veled

through

its

return

stroke

and

check

to

adjust

the

motor

mount

for

proper

the

maximum

driving

clearance

between

ratcheting

.

This

corresponds

to

a

0.015

the

driving

pawl

and

the

ratchet

tooth

inch

clearance

between

the

tip

of

the

“

Q

”

,

Fig

,

14

.

Rotate

the

charging

wrench

ratchet

tooth

and

the

tip

of

the

pawl

as

until

the

driving

pawl

has

advanced

the

paw

)

falls

past

the

ratchet

tooth

,

If

for

some

reason

the

0

,

040

inch

clearance

cannot

be

maintained

a

some

-

what

less

amount

is

satisfactory

provided

the

mechanism

will

slowly

close

the

breaker

when

operated

manually

or

close

the

breaker

normally

when

operated

elec

-

trically

and

that

the

springs

can

be

charged

manually

or

electrically

.

Refer

to

Fig

.

12

and

to

“

P

”

and

"

Q

”

,

Fig

.

14

.

The

driving

pawl

(

74

)

,

Fig

.

12

,

must

advance

the

ratchet

wheel

(

73

)

sufficiently

on

each

stroke

to

allow

the

latching

pawl

(

70

)

to

fall

into

the

ratchet

teeth

of

the

ratchet

wheel

.

This

should

be

checked

with

a

major

portion

of

the

closing

spring

load

against

the

driving

members

.

With

the

mechanism

unblocked

,

manually

charge

the

closing

springs

with

the

manual

charging

wrench

(

7

)

,

Fig

.

5

,

until

they

are

slightly

more

than

half

charged

,

Slowly

rotate

the

charging

wrench

until

the

driving

pawl

(

74

)

,

Fig

.

12

,

has

tra

-

ratchet

tooth

to

its

maximum

travel

.

Now

check

the

latching

clearance

between

the

ratchet

tooth

and

the

latching

pawl

(

70

)

,

“

P

”

,

Fig

.

14

.

The

clearance

should

be

approximately

equal

for

both

the

driving

and

latching

pawls

and

not

less

than

0.040

inch

in

either

case

when

a

feeler

gage

is

inserted

to

approximately

one

-

half

the

depth

of

the

ratchet

tooth

and

be

-

tween

the

driven

portion

of

the

ratchet

tooth

and

the

flat

above

the

tip

of

the

pawl

the

closing

springs

must

first

be

pawl

,

0.040

inch

is

a

good

place

to

start

fully

charged

and

blocked

.

Remove

roll

If

adjustment

is

required

for

either

12

Courtesy of NationalSwitchgear.com

Spring

-

charged

Operating

Mechanism

Type

ML

-

14

-

0

GF

,

K

7153

Cam

Shaft

Guide

Block

Closing

Latch

Roller

Closing

Latch

Shaft

Closing

Latch

Control

Panel

Shock

Mount

2

.

9

.

Charge

-

discharge

Indicator

10

.

Charging

Motor

Limit

Switch

Striker

11

.

Charging

Motor

Limit

Switches

12

.

Motor

Lead

Terminal

Board

13

.

Control

Wiring

14

.

Spring

-

charging

Motor

16

.

Closing

Latch

Wipe

Adjusting

Screw

17

.

Closing

Latch

18

.

Closing

Coil

Plunger

19

.

Trip

Latch

Safety

Rod

20

.

Motor

Limit

Switch

Adjusting

Screw

.

3

.

4

.

5

.

6

.

7

.

Fig

.

8

B

Mechanism

Open

-

Trip

Latch

in

Place

(

Springs

Discharged

)

JjOvj

from

right

side

of

motor

mounting

plate

by

driving

the

through

the

side

plate

.

Loosen

the

motor

mounting

bolts

(

5

)

,

Fig

.

5

,

and

move

the

entire

motor

assembly

to

the

rear

toward

the

breaker

tanks

if

the

clearance

is

under

the

mini

-

mum

at

the

latching

and

safety

pawls

,

and

,

to

the

front

away

from

the

breaker

tanks

if

the

clearance

is

under

the

mini

-

mum

at

the

driving

pawl

.

Move

the

motor

assembly

approximately

twice

the

dimen

-

sional

increase

required

at

the

pawl

.

Move

the

entire

motor

and

motor

-

mount

assem

-

bly

in

1

/

64

inch

increments

as

a

small

movement

here

results

in

a

large

move

-

ment

at

the

pawls

.

Be

certain

the

motor

have

a

0.015

to

0.030

inch

clearance

above

the

teeth

of

the

ratchet

wheel

(

73

)

when

the

closing

spring

(

62

)

and

(

79

)

,

Fig

.

II

,

are

completely

charged

,

“

H

”

,

Fig

.

14

.

This

is

checked

with

the

closing

springs

completely

closed

and

gagged

by

measuring

the

distance

between

the

out

-

board

latching

pawl

and

the

ratchet

tooth

with

the

pawl

raised

as

high

as

possible

.

This

is

adjusted

by

loosening

the

locknut

(

86

)

,

Fig

.

12

,

and

adjusting

the

latching

and

safety

pawls

'

adjustment

screw

(

69

)

,

Fig

.

12

,

as

necessary

.

The

safety

pawl

(

inboard

of

the

latching

pawl

)

will

then

have

up

to

a

0.060

inch

clearance

more

than

the

latching

pawl

.

assembly

i

$

‘

moved

straight

forward

or

rearward

and

tighten

the

one

bolt

on

the

right

side

of

the

mounting

frame

first

to

assure

proper

alignment

.

After

tightening

the

remaining

bolts

the

springs

should

be

released

and

the

clearance

again

checked

as

described

above

.

Re

drill

and

in

the

same

area

to

prevent

movement

.

LATCHING

PAWL

TO

RATCHET

WHEEL

CLEARANCE

Refer

to

Fig

.

12

and

to

“

H

”

,

Fig

.

14

.

The

latching

pawl

(

70

)

,

Fig

.

12

(

which

is

the

outboard

pawl

at

this

location

)

must

13

Courtesy of NationalSwitchgear.com

GEK

7153

Spring

-

charged

Operating

Mechanism

Type

ML

-

J

4

-

0

a

*

m

a

*

21

(

N

5

<

D

O

)

ON

7

-

o

Q

CO

00

o

ON

•

T

-

*

1

UllllilLajlllllHH

|

12

Li

32

14

33

15

1

.

Mechanism

House

Support

Bracket

2

.

Mechanism

Frame

3

.

Output

Crank

Main

Shaft

4

.

Output

Crank

5

.

Prop

6

.

Limit

Switch

Cam

7

.

Cam

Shaft

8

.

Closing

Latch

9

.

Closing

Latch

Shaft

10

.

Closing

Latch

Wipe

Adjusting

Screw

11

.

Closing

Latch

Wipe

Adjusting

Screw

Locknut

12

.

Closing

Latch

Monitoring

Switch

Operating

Lever

13

.

Closing

Coil

14

.

Closing

Coil

Support

Bracket

30

.

Motor

Limit

Switches

31

.

Motor

Support

Bracket

32

.

Motor

Support

Bracket

Bolts

33

.

Manual

Close

Push

Rod

Button

34

.

Spring

-

charging

Motor

35

.

Mechanism

Frame

Tie

Rod

36

.

Vertical

Operating

Rod

Lower

Coupling

37

.

Cam

Follower

Roller

38

.

Closing

Prop

39

.

Cam

40

.

Linkage

to

Output

Crankshaft

41

.

Upper

Link

42

.

Trip

Coil

43

.

Trip

Coil

Plunger

44

.

Lock

-

out

Switch

(

69

device

)

45

.

Trip

Coil

Linkage

15

.

Closing

Coil

Plunger

16

.

Closing

Latch

Monitoring

Switch

17

.

Closing

Latch

Spring

18

.

Operation

Counter

19

.

Auxiliary

Switch

20

.

Prop

Reset

Spring

21

.

Stop

22

.

Trip

Latch

Checking

Switch

23

.

Trip

Latch

Checking

Switch

Operating

Lever

24

Trip

Latch

Shaft

25

.

Charged

-

discharged

Indicator

26

.

Motor

Limit

Switch

Striker

27

.

Link

Shaft

28

.

Motor

Limit

Switch

Support

Bolts

29

.

Closing

Latch

Roller

7

’

Fig

.

9

.

Left

Side

View

of

the

Mechanism

Linkage

in

the

Latch

Closed

Position

(

Spring

-

charged

)

14

Courtesy of NationalSwitchgear.com

Spring

-

charged

Operating

Mechanism

Type

ML

-

14

-

0

GEK

7153

44

-

46

f

\

%

50

\

^

rnasm

67

~

—

52

68

37

38

7

—

56

88

-

27

39

57

ZvWW

-

S

'

*

12

•

i

o

33

I

49

46

.

Mechanism

Frame

Tie

Rod

84

.

Trip

Latch

Clearance

Adjustment

Locking

Nut

85

.

Vertical

Operating

Rod

Locking

65

.

Trip

Coil

Support

66

.

Trip

Coil

Shims

67

.

Prop

Spacer

and

Reset

Spring

47

.

Trip

Latch

Spring

48

.

Trip

Crank

49

.

Lower

Link

50

.

Trip

Latch

51

.

Trip

Latch

Guide

Roller

52

.

Trip

Latch

Roller

53

.

Trip

Latch

Stop

54

.

Trip

Latch

Roller

Shaft

55

.

Trip

Latch

Assembly

Support

Bolt

86

.

Latching

and

Safety

Pawls

Adjustment

Locknut

87

.

Driving

Pawl

Return

Spring

88

.

Cam

Shaft

Bearing

89

.

Mechanism

House

Adjusting

Bolt

and

Locknut

90

.

Closing

Latch

Bearing

91

.

Left

Guide

Block

Bearing

92

.

Right

Guide

Block

Bearing

93

.

Sprocket

94

.

Driving

Chain

95

.

Driving

Eccentric

Bearing

96

.

Driving

Link

Bushing

97

.

Driving

Pawl

Bushing

98

.

Driving

Crank

Bushing

99

.

Sprocket

Shaft

Bushing

100

.

Trip

Latch

Blocking

Hole

101

.

Locking

Nut

102

.

Trip

Latch

Roller

Shaft

Bearing

68

.

Cam

Follower

Roller

Shaft

69

.

Latching

and

Safety

Pawls

Adjustment

Screw

70

.

Latching

Pawl

71

.

Trip

Coil

Linkage

Adjustment

Allen

Head

Bolt

72

.

Manual

Trip

Lever

73

.

Ratchet

Wheel

74

.

Driving

Pawl

75

.

Driving

Crank

76

.

Driving

Eccentric

77

.

Manual

Charging

Stud

78

.

Driving

Link

79

.

Right

Closing

Spring

80

.

Motor

Support

Bracket

81

.

Right

Closing

Spring

Blocking

Device

82

.

Manual

Trip

Adjusting

Bolt

83

.

Manual

Trip

Locking

Nut

Link

56

.

Trip

Latch

Clearance

Adjustment

Eccentric

Shaft

57

.

Trip

Latch

Assembly

Support

Link

Spring

58

.

Breaker

Vertical

Operating

Rod

59

.

Auxiliary

Switch

Operating

Linkage

60

.

Trip

Latch

Checking

Switch

Support

61

.

Guide

Block

62

.

Left

Closing

Spring

63

.

Closing

Spring

Support

64

.

Left

Closing

Spring

Blocking

Device

Fig

.

10

Left

Side

Sectional

View

of

the

Mechanism

Linkage

in

the

Latch

Closed

Position

15

Courtesy of NationalSwitchgear.com

GEK

7153

Spring

-

charged

Operating

Mechanism

Type

ML

14

0

Mechanism

House

Support

Bracket

Mechanism

Frame

Output

Crank

Main

Shaft

Output

Crank

Prop

Limit

Switch

Cam

Cain

Shaft

Closing

Latch

Closing

Latch

Shaft

Closing

Latch

Wipe

Adjusting

Screw

Closing

Latch

Wipe

Adjusting

Screw

Locknut

Closing

Latch

Monitoring

Switch

Operating

Lever

Closing

Coil

Closing

Coil

Support

Bracket

Closing

Coil

Plunger

Closing

Latch

Monitoring

Switch

Closing

Latch

Spring

Operation

Counter

Auxiliary

Switch

Prop

Reset

Spring

Stop

Trip

Latch

Checking

Switch

Trip

Latch

Checking

Switch

Operating

Lever

Trip

Latch

Shaft

Charged

-

discharged

Indicator

Motor

Limit

Switch

Striker

Link

Shaft

Motor

Limit

Switch

Support

Bolts

Closing

Latch

Roller

Motor

Limit

Switches

Motor

Support

Bracket

Motor

Support

Bracket

Bolts

Manual

Close

Push

Rod

Button

Spring

-

charging

Motor

Mechanism

Frame

Tie

Rod

Vertical

Operating

Rod

Lower

Coupling

Cam

Follower

Roller

Closing

Prop

Cam

Linkage

to

Output

Crankshaft

Upper

Link

Trip

Coil

Trip

Coil

Plunger

Lock

-

out

Switch

(

69

device

)

Trip

Coil

Linkage

Mechanism

Frame

Tie

Rod

Trip

Latch

Spring

Trip

Crank

Lower

Link

Trip

Latch

Trip

Latch

Guide

Roller

Trip

Latch

Roller

1

,

@

2

.

3

.

4

.

5

.

~

89

1

6

.

7

.

58

65

8

.

9

.

10

.

66

18

n

.

42

19

12

.

II

13

.

59

43

14

.

—

44

15

.

16

.

45

17

.

-

69

18

.

20

102

19

.

60

20

.

—

70

>

<

D

K

21

,

23

—

24

22

.

47

*

a

48

23

.

'

.

'

I

&

u

50

>

71

2

24

.

-

52

-

trJ

o

25

.

53

o

M

•

51

26

.

25

27

.

91

72

28

.

§

CO

92

29

.

30

73

30

.

OO

O

6

31

.

61

32

.

33

.

90

2

?

-

74

34

.

9

-

33

35

.

8

99

36

.

32

76

12

37

,

77

38

.

78

34

39

.

79

40

.

62

-

80

41

.

42

.

93

63

43

.

94

44

.

c

45

.

64

—

-

81

46

.

47

.

l L

48

.

49

.

50

,

51

.

52

.

§

Pig

.

11

,

Front

View

of

the

Mechanism

in

the

Latch

Closed

Position

16

Courtesy of NationalSwitchgear.com

Spring

-

charged

Operating

Mechanism

Type

ML

-

14

-

0

GEK

71

S

3

-

3

58

ID

*

>

85

a

>

44

-

0

$

36

45

4

48

100

86

c

\

o

Q

24

-

69

<

N

co

70

00

82

O

98

CN

83

l

-

i

101

.

2

?

[

J

*

73

72

92

27

61

84

Q

74

2

33

87

97

76

34

-

13

95

14

77

75

96

78

53

.

Trip

Latch

Stop

54

.

Trip

Latch

Roller

Shaft

55

.

Trip

Latch

Assembly

Support

85

.

Vertical

Operating

Rod

Locking

69

.

Latching

and

Safety

Pawls

Adjustment

Screw

70

.

Latching

Pawl

71

.

Trip

Coil

Linkage

Adjustment

Allen

Head

Bolt

72

.

Manual

Trip

Lever

73

.

Ratchet

Wheel

74

.

Driving

Pawl

75

.

Driving

Crank

76

.

Driving

Eccentric

77

.

Manual

Charging

Stud

78

.

Driving

Link

79

.

Right

Closing

Spring

80

.

Motor

Support

Bracket

81

.

Right

Closing

Spring

Blocking

Device

82

.

Manual

Trip

Adjusting

Bolt

83

.

Manual

Trip

Locking

Nut

84

.

Trip

Latch

Clearance

Adjustment

Locking

Nut

Fig

.

12

Right

Side

View

of

the

Mechanism

in

the

Latch

Closed

Position

Bolt

86

.

Latching

and

Safety

Pawls

Adjustment

Locknut

87

.

Driving

Pawl

Return

Spring

88

.

Cam

Shaft

Bearing

89

.

Mechanism

House

Adjusting

Bolt

and

Locknut

90

.

Closing

Latch

Bearing

91

.

Left

Guide

Block

Bearing

92

.

Right

Guide

Block

Bearing

93

.

Sprocket

94

.

Driving

Chain

95

.

Driving

Eccentric

Bearing

96

.

Driving

Link

Bushing

97

.

Driving

Pawl

Bushing

98

.

Driving

Crank

Bushing

99

.

Sprocket

Shaft

Bushing

100

.

Trip

Latch

Blocking

Hole

101

.

Locking

Nut

102

.

Trip

Latch

Roller

Shaft

Bearing

Link

56

.

Trip

Latch

Clearance

Adjustment

Eccentric

Shaft

57

.

Trip

Latch

Assembly

Support

Link

Spring

58

.

Breaker

Vertical

Operating

Rod

59

.

Auxiliary

Switch

Operating

Linkage

60

.

Trip

Latch

Checking

Switch

Support

61

.

Guide

Block

62

.

Left

Closing

Spring

63

.

Closing

Spring

Support

64

.

Left

Closing

Spring

Blocking

Device

65

.

Trip

Coil

Support

66

.

Trip

Coil

Shims

67

.

Prop

Spacer

and

Reset

Spring

m

68

.

Cam

Follower

Roller

Shaft

17

Courtesy of NationalSwitchgear.com

GEK

7153

Spring

-

charged

Operating

Mechanism

Type

ML

-

14

-

0

This

can

also

be

checked

by

mea

-

suring

the

distance

between

the

bottom

of

the

latching

and

safety

adjustment

screw

and

the

top

surface

of

the

latching

pawl

when

the

closing

springs

are

com

-

pletely

charged

.

TRIP

LATCH

CHECKING

SWITCH

Refer

to

Fig

,

10

and

to

“

Y

”

and

“

W

”

,

Fig

.

15

.

Rotate

the

trip

latch

(

50

)

,

Fig

.

10

,

clockwise

(

looking

at

the

left

side

of

the

mechanism

)

by

pressing

the

manual

trip

lever

(

17

)

,

Fig

.

7

,

to

open

the

latch

checking

switch

operating

lever

(

23

)

,

Fig

.

9

.

Allow

the

trip

latch

to

reset

slowly

and

determine

the

point

at

which

the

contacts

of

the

trip

latch

checking

switch

(

22

)

make

by

using

a

circuit

continuity

tester

,

such

as

a

light

indicator

or

bell

set

.

The

contacts

of

the

trip

latch

checking

switch

should

just

make

when

there

is

a

1

/

16

inch

gap

between

the

trip

latch

(

50

)

,

Fig

.

10

,

and

the

stop

(

53

)

located

on

the

trip

latch

assembly

sup

-

port

link

(

55

)

.

There

should

be

a

min

-

imum

of

1

/

64

inch

between

the

operating

lever

(

5

)

,

Fig

.

7

,

and

the

trip

latch

checking

switch

(

22

)

,

Fig

.

9

.

Bend

the

trip

latch

checking

switch

operating

lever

(

23

)

,

Fig

.

9

,

as

necessary

to

adjust

.

/

T

*

\

>

&

EN

8

HEAD

BOLT

XJ

§

£

s

o

*

>

CO

8

X

3

CO

TRIP

COIL

PLUNGER

to

Refer

to

Fig

.

10

and

“

S

’

\

Fig

,

13

.

The

plunger

(

43

)

of

the

trip

coil

(

42

)

must

have

a

minimum

of

1

/

8

inch

free

travel

before

the

trip

latch

(

50

)

starts

to

move

to

provide

proper

tripping

at

reduced

voltages

.

This

is

adjusted

by

loosening

the

Allen

set

screw

which

is

located

in

the

trip

latch

shaft

(

24

)

.

This

set

screw

bears

against

the

Allen

head

bolt

(

71

)

,

Fig

.

11

,

securing

the

bolt

in

place

.

Rotate

the

trip

crank

(

48

)

,

Fig

.

10

,

about

the

trip

latch

shaft

until

the

correct

free

travel

of

the

trip

coil

plunger

is

obtained

.

Adjust

the

Allen

head

bolt

to

contact

the

trip

crank

at

this

point

.

Install

the

Allen

screw

from

the

front

side

of

the

trip

latch

shaft

from

the

front

side

of

the

trip

latch

shaft

then

tighten

the

Allen

head

adjusting

bolt

(

71

)

,

Fig

.

11

*

This

free

travel

must

be

sufficient

so

that

the

breaker

is

able

to

trip

at

its

minimum

trip

voltage

.

The

values

are

in

a

chart

under

FINAL

INSPECTION

.

tea

&

Fig

.

13

Adjustment

and

Final

Clearance

Checks

18

Courtesy of NationalSwitchgear.com

Spring

-

charged

Operating

Mechanism

Type

ML

14

-

0

GEK

71

S

3

direction

,

Tighten

the

locknut

after

adjusting

.

RECLOSING

TIME

*

DELAY

RELAY

(

79

X

)

This

relay

is

an

optional

feature

for

those

who

desire

an

adjustable

reclosing

operation

.

The

reclosing

cycle

must

be

set

up

so

that

the

breaker

contacts

open

at

least

the

minimum

distance

which

is

given

in

the

breaker

instruction

book

before

the

contacts

start

to

reclose

,

The

point

at

.

which

they

start

to

reclose

is

determined

by

the

breaker

opening

speed

and

the

setting

of

the

time

-

delay

relay

which

initiates

the

reclosing

circuit

.

The

oper

-

ating

voltage

is

given

on

the

breaker

nameplate

and

the

proper

opening

and

closing

speeds

are

given

in

the

breaker

instruction

book

.

FINAL

INSPECTION

After

the

mechanism

has

been

install

-

ed

with

all

mechanical

and

electrical

Fig

.

14

Right

Side

View

Adjustment

and

Final

Clearance

Checks

£

CLOSING

COIL

PLUNGER

N

"

j

*

.

g

Refer

to

Fig

.

9

and

“

F

”

,

Fig

.

15

.

The

pj

closing

coil

plunger

(

15

)

of

the

closing

-

p

coil

(

13

)

must

have

a

minimum

of

1

/

8

inch

free

travel

before

the

tang

of

the

5

;

closing

latch

is

contacted

.

If

this

free

travel

is

less

than

1

/

8

inch

,

remove

the

coil

and

file

the

plunger

(

18

)

,

Fig

.

8

B

,

until

it

has

1

/

8

inch

free

travel

.

f

/

Y

.

;

»

I

1

MANUAL

TRIP

LEVER

Refer

to

Fig

.

2

and

“

M

”

,

Fig

.

14

.

The

manual

trip

lever

(

19

)

,

Fig

.

2

,

must

be

adjusted

so

that

when

the

push

button

(

21

)

,

Fig

.

2

,

is

activated

the

mechanism

trips

and

the

69

device

(

17

)

,

Fig

,

2

,

is

operated

.

This

is

adjusted

by

loosening

the

locknut

(

83

)

,

Fig

.

12

,

and

turning

the

adjusting

bolt

(

82

)

,

Fig

.

12

,

in

the

proper

Fig

.

14

A

Sectional

View

Showing

Adjustment

P

19

Courtesy of NationalSwitchgear.com

GEK

7153

Spring

-

charged

Operating

Mechanism

Type

ML

-

14

-

0

connections

completed

,

make

the

follow

-

ing

inspection

and

test

:

'

Nt

'

y

*

>

0

)

&

A

.

See

that

the

mechanism

is

prop

-

^

erly

set

up

and

securely

fastened

to

the

breaker

framework

.

£

•

>

B

.

Review

the

following

adjust

-

meats

:

0

3

>

_

C

.

Check

that

all

bolts

,

nuts

and

screws

are

properly

tightened

2

and

that

all

washers

and

cotter

g

pins

are

in

place

with

cotter

ends

effectively

bent

over

.

oo

o

CQ

D

.

Inspect

all

wiring

for

damage

2

during

installation

work

,

check

^

terminal

connections

for

loose

^

screws

,

and

test

for

possible

grounds

or

short

circuits

.

E

.

See

that

all

bearing

surfaces

and

^

<

D

P

4

o

Fig

.

14

B

Sectional

View

Showing

Adjustment

Q

O

i

I

F

L

i

.

!

wm

.

)

U

Fig

.

14

C

Sectional

View

Showing

Adjustment

H

Fig

.

15

Left

Side

View

Adjustment

and

Final

Clearance

Checks

20

Courtesy of NationalSwitchgear.com

GE ML-14-0 User manual

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