Westinghouse DH Manuale utente

251

MAINTENANCE

RECEIVING

OPERATION

INSTRUCTIONS

ion

CIRCUIT

BREAKER

Type

AIR

Horizontal

Drawout

Indoor

and

Outdoor

Service

INTERRUPTING

RATINGS

—

AMPERES

VOLTAGE

RATINGS

PHASE

INTER

RUPTING

RATING

AMPERES

CONTIN

AIR

—

CIRCUIT

BREAKER

Min

for

Rated

uous

Max

Design

Rated

Max

Amperes

CYCLES

TYPE

Rated

MYA

INT

Voltage

MVA

150

3.5

1200

150

4.16

4.76

000

500

4.16

4.76

3.5

2000

150

250

4.16

4.76

3.85

1200

250

4.16

4.76

3.85

2000

250

WESTINGHOUSE

ELECTRIC

CORPORATION

SWITCHGEAR

DIVISION

EAST

PITTSBURGH

FEBRUARY

1959

EAST

PITTSBURGH

PLANT

NEW

INFORMATION

Printed

Courtesy of NationalSwitchgear.com

TABLE

CONTENTS

DESCRIPTION

Part

One

Description

Pages

RECEIVING

HANDLING

AND

STORING

Part

Two

Receiving

Handling

Storing

Weights

Page

OPERATION

Part

Three

Operation

Mechanism

Panel

Shunt

Trip

Magnet

Cut

Off

Switch

Contact

Position

Indicator

Interlock

Position

Indicator

Operation

Counter

Auxiliary

Switch

Latch

Check

Switch

Undervoltage

Trip

Attachment

...

Three

Coil

Trip

Attachment

Contacts

Arc

Chutes

Levering

Device

Test

Position

Operating

Position

Interlock

Secondary

Contacts

Ground

Contact

Puffer

Assembly

Mechanism

Operated

Control

Switch

Secondary

Control

Wiring

Pages

INSTALLATION

Part

Four

Installation

Pages

ADJUSTMENT

Part

Five

Mechanism

Tripping

Latch

Cut

Off

Switch

Latch

Check

Switch

Contacts

Pages

MAINTENANCE

Part

Six

Maintenance

Contacts

Moving

Contact

Assembly

Stationary

Main

Contact

Stationary

Arcing

Contacts

Arc

Chutes

Broken

Cracked

Ceramic

Parts

Pages

Courtesy of NationalSwitchgear.com

MAINTENANCE

(

Continued

)

Pages

Part

Six

Erosion

Ceramics

Dirt

Arc

Chute

Cleaning

Arc

Shields

Operating

Mechanism

Lubrication

Clearances

Puffer

Nozzle

Auxiliary

Switch

Insulation

PARTS

IDENTIFICATION

Pages

Part

Seven

Parts

Identification

Photographs

Fig

Moving

Contact

Assembly

Fig

Stationary

Contact

Assembly

Fig

Mechanism

Assembly

Fig

Puffer

Assembly

Fig

Auxiliary

Switch

Renewal

Parts

LIST

ILLUSTRATIONS

Page

Figure

Type

250

1200

Amp

Breaker

Completely

Assembled

Type

250

1200

Amp

Breaker

Completely

Assembled

Rear

View

Type

250

1200

Amp

Breaker

with

Barrier

Removed

Front

View

Type

250

1200

Amp

Breaker

with

Barrier

Removed

and

Arc

Chutes

Tilted

Back

for

Inspection

Solenoid

Operating

Mechanism

Solenoid

Operating

Mechanism

Diagram

Tripping

Positions

Mechanism

Front

Panel

Undervoltage

Trip

Unit

Type

150

1200

Amp

Breaker

Contacts

Viewed

from

Rear

Type

250

1200

Amp

Breaker

Contacts

Viewed

from

Rear

Type

150

250

2000

Amp

Breaker

Contacts

Viewed

from

Rear

Type

150

1200

Amp

Breaker

Contacts

Viewed

from

Front

Type

250

1200

Amp

Breaker

Contacts

Viewed

from

Front

Type

150

250

2000

Amp

Breaker

Contacts

Viewed

from

Front

Arc

Chute

Arrangement

Partially

Assembled

Arc

Chutes

Levering

Device

Position

for

Rolling

into

Cell

Levering

Device

with

Arms

Position

taken

when

Breaker

Operating

Position

Cell

View

Lower

Part

Breaker

from

Rear

Operating

Secondary

Contacts

Secondary

Contacts

Extended

for

Completing

Control

Circuits

when

Breaker

Test

Position

Switch

Operating

Arm

Diagram

Breaker

Internal

Wiring

Type

150

250

Contact

Adjustment

Type

150

1200

Amp

Moving

Contact

Assembly

Type

150

1200

Amp

Stationary

Contact

Assembly

Mechanism

Assembly

Puffer

Assembly

Type

Auxiliary

Switch

Details

Courtesy of NationalSwitchgear.com

FIO

Type

250

1200

Ampere

Breaker

Completely

Assembled

One

the

outstanding

improvements

modern

power

distribution

has

been

the

development

the

air

circuit

breaker

Westinghouse

for

distribution

circuit

voltages

circuits

where

the

duty

breakers

heavy

long

life

with

minimum

maintenance

makes

the

ion

air

breaker

outstanding

performer

the

type

magnetic

ion

air

circuit

breakers

Westinghouse

offers

complete

standard

line

for

circuits

from

2.3

Each

the

type

air

circuit

breakers

three

pole

electrically

operated

and

built

complete

horizontal

drawout

unit

for

metal

clad

switchgear

Breaker

units

the

same

rating

are

interchangeable

that

changing

breakers

matter

minutes

Since

they

are

drawn

out

horizontally

lowering

lifting

necessary

Steel

barriers

and

automatic

interlocks

prevent

contact

with

live

parts

while

the

breakers

are

being

changed

the

case

most

high

voltage

electrical

equipment

these

breakers

should

inspected

and

maintained

regular

intervals

order

obtain

the

most

dependable

performance

Courtesy of NationalSwitchgear.com

PART

ONE

The

type

150

and

250

air

cir

cuit

breakers

are

three

pole

electrically

operated

horizontal

drawout

units

for

use

metal

clad

switch

gear

The

ratings

the

breakers

are

tabulated

page

Figure

shows

the

front

and

right

side

type

250

breaker

completely

assembled

while

Fig

shows

the

breaker

from

the

left

rear

ready

placed

the

cell

Figure

the

same

breaker

with

the

main

barrier

removed

and

shows

the

center

coil

arc

chutes

their

operating

positions

Part

the

separating

contacts

primary

disconnect

ing

contacts

insulated

operating

rods

auxiliary

switch

and

part

the

solenoid

operating

mecha

nism

are

visible

These

components

are

supported

welded

steel

frame

which

mounted

flanged

wheels

for

rolling

into

the

metal

clad

cell

the

lower

part

the

frame

located

the

levering

device

for

moving

the

breaker

into

final

contact

engagement

This

interlocked

with

the

mecha

nism

prevent

inserting

withdrawing

the

breaker

with

the

contacts

closed

and

also

prevents

closing

the

contacts

unless

the

breaker

completely

out

the

cell

Also

located

the

lower

part

the

frame

are

the

auxiliary

switch

shunt

trip

cut

off

switch

latch

check

switch

operation

counter

breaker

contact

position

indicator

levering

vice

position

indicator

socket

for

maintenance

closing

lever

and

secondary

contacts

for

automati

cally

disconnecting

the

control

wiring

when

the

breaker

the

withdrawn

position

The

arc

chutes

this

breaker

are

the

center

coil

design

which

the

magnetic

circuit

shaped

with

the

cross

member

the

passing

through

the

center

the

arc

chute

The

blowout

coils

are

wound

around

the

cross

member

the

and

are

located

inside

the

arc

chute

jacket

With

this

arrangement

the

blowout

magnet

becomes

integral

part

each

arc

chute

assembly

provide

accessibility

for

contact

maintenance

and

inspection

the

arc

chutes

are

hinged

the

rear

Figure

shows

the

breaker

with

the

arc

chutes

tilted

back

this

position

the

contacts

are

readily

available

for

inspection

and

maintenance

one

piece

barrier

assembly

placed

the

breaker

before

rolled

into

the

cell

The

front

sheet

one

eighth

inch

steel

and

forms

ground

barrier

between

personnel

and

live

parts

when

the

unit

the

cell

The

Type

150

and

250

air

cir

cuit

breakers

are

arranged

for

use

metal

clad

equipment

from

which

they

are

drawn

out

horizon

FIO

Type

250

1200

Ampere

Breaker

Completely

Assembled

Rear

View

tally

The

series

breakers

are

interchangeable

with

the

series

breakers

the

same

rating

may

seen

Fig

all

parts

are

supported

steel

frame

with

four

wheels

equipped

with

roller

bear

ings

facilitate

moving

the

breaker

The

wheel

flanges

engage

with

rails

align

the

breaker

the

metal

clad

cell

The

six

main

primary

conductors

project

hori

zontally

from

the

rear

the

breaker

and

are

sup

ported

and

insulated

Redarta

bushings

the

rear

these

main

conductors

are

the

primary

dis

connects

which

are

clusters

contact

fingers

ranged

engage

the

primary

conductors

the

cell

Courtesy of NationalSwitchgear.com

DESCRIPTION

ARC

CHUTE

BLOWOUT

MAGNET

ARC

CHUTE

HINGE

SHUNT

CONNECTION

PRIMARY

DISCONNECTS

MOVING

CONTACT

ARM

SHUTTER

ROLLER

OPERATING

ROD

LEVERING

DEVICE

ARM

TRIP

LEVER

LEVERING

DEVICE

OPERATING

SHAFT

MECHANISM

PANEL

MAINTENANCE

CLOSING

HANDLE

SOCKET

FLANGED

WHEELS

FIG

Type

250

1200

Ampere

Breaker

with

Barrier

removed

Front

View

Courtesy of NationalSwitchgear.com

DESCRIPTION

251

150

250

AIR

CIRCUIT

BREAKERS

FIO

Type

250

1200

Ampere

Breaker

with

Barrier

removed

and

Arc

Chutes

tilted

back

for

Inspection

Courtesy of NationalSwitchgear.com

PART

TWO

RECEIVING

HANDLING

STORING

All

Type

breakers

are

assembled

and

given

operating

tests

the

factory

after

which

they

are

carefully

inspected

and

prepared

for

shipment

workmen

experienced

the

proper

handling

and

packing

electrical

equipment

The

complete

breaker

shipped

single

crate

The

breaker

frame

located

the

front

the

crate

with

the

interphase

barrier

installed

The

three

arc

chutes

are

individually

packaged

and

are

located

the

rear

the

crate

After

the

equipment

has

been

unpacked

make

careful

inspection

for

any

damage

which

may

have

occurred

transit

the

apparatus

has

been

dam

aged

file

claim

immediately

with

the

carrier

and

notify

the

nearest

Westinghouse

Sales

Office

HANDLING

Remove

the

crating

and

packing

carefully

avoid

damage

from

improper

handling

crow

bars

other

tools

use

nail

puller

for

the

uncrating

Care

must

used

handling

the

arc

chutes

since

the

splitter

plates

them

are

made

ceramic

material

which

may

break

dropped

The

base

the

crate

may

used

skid

for

moving

the

breaker

the

breaker

may

lifted

with

slings

under

the

crate

the

breaker

lifted

with

slings

move

while

still

crated

After

the

breaker

unpacked

the

best

way

move

rolling

its

own

wheels

necessary

lift

the

breaker

after

crated

lift

without

the

barrier

arc

chutes

place

Slings

may

placed

under

the

breaker

frame

hooks

used

the

holes

provided

near

the

top

the

frame

STORING

The

arcing

chambers

are

shipped

separate

containers

located

the

rear

the

crate

guard

against

damage

from

rough

handling

and

for

better

protection

from

dust

and

water

liquids

Store

them

their

shipping

containers

until

ready

for

use

Store

all

components

these

breakers

clean

dry

place

During

the

storage

period

keep

them

sufficiently

warm

prevent

moisture

condensation

Table

Approximate

Weights

(

Pounds

)

BREAKER

WITHOUT

CHUTE

BREAKER

AMPERE

RATING

SINGLE

BARRIER

ASSEM

COM

TYPE

PLETE

BREAKER

ARC

CHUTE

BLY

BARRIER

150

1200

2000

695

1030

960

100

1315

250

1200

695

1110

2000

960

110

100

1390

PART

THREE

OPERATION

Before

placing

the

circuit

breaker

service

advantageous

become

familiar

with

the

con

struction

and

function

the

various

parts

which

are

described

the

following

paragraphs

This

material

should

studied

carefully

The

general

arrangement

the

breaker

com

ponents

shown

Fig

The

solenoid

coil

built

exert

horizontal

force

the

mechanically

trip

free

linkage

the

mechanism

This

linkage

turn

exerts

upward

force

the

three

insulated

oper

ating

rods

which

act

the

moving

contact

arms

the

contacts

The

breaker

has

two

sets

contacts

the

main

contacts

for

carrying

the

con

tinuous

load

current

and

the

arcing

contacts

for

carrying

the

current

during

interruption

the

contacts

the

arcing

contacts

touch

first

establish

the

circuit

and

then

the

main

contacts

closed

opening

the

main

contacts

separate

first

and

then

the

arcing

contacts

This

insures

that

the

main

contact

surfaces

will

main

free

burning

and

pitting

for

good

current

carrying

capacities

Above

the

arcing

contacts

are

located

the

center

coil

arc

chutes

for

extinguishing

the

arc

while

the

breaker

contacts

are

separating

The

breaker

tripped

lifting

the

primary

latch

either

manually

electrically

means

the

trip

coil

MECHANISM

The

solenoid

operating

mechanism

with

its

trip

free

linkage

shown

Fig

with

the

operation

the

linkage

diagrammed

Fig

this

mecha

nism

the

horizontal

pull

the

solenoid

coil

trans

mitted

the

contact

operating

rods

through

sys

tem

links

which

rotate

counterclockwise

about

the

operating

center

This

linkage

system

consists

four

major

links

the

non

trip

free

lever

trip

free

lever

upper

trip

free

link

and

lower

trip

free

link

These

members

are

arranged

shown

and

are

held

Courtesy of NationalSwitchgear.com

251

OPERATION

150

250

AIR

CIRCUIT

BREAKERS

CONTACT

POSITION

INDICATOR

CUTOFF

SWITCH

OPERATING

ARM

MECHANISM

STOP

BOLT

TRIP

LEVER

SOLENOID

BACK

PLATE

NON

TRIP

FREE

LEVER

TRIP

FREE

LEVER

LOWER

TRIP

FREE

LINKS

air

CLOSING

LINK

SOLENOID

COIL

CLOSING

LATCH

FIG

Solenoid

Operating

Mechanism

form

rigid

member

the

cam

link

and

tripping

cam

The

tripping

cam

prevented

from

rotating

the

tripping

latch

When

the

solenoid

energized

the

movable

core

pulls

the

junction

the

non

trip

free

lever

and

the

lower

trip

free

link

through

the

closing

link

This

causes

the

system

rotate

about

the

operating

center

the

parts

move

from

the

RESET

POSITION

Fig

the

CLOSED

POSITION

Fig

The

trip

free

lever

then

exerts

upward

force

the

three

operating

rods

the

breaker

contacts

The

mechanism

linkage

held

this

position

the

closing

latch

which

locks

the

bottom

the

non

trip

free

lever

The

breaker

tripped

either

electrically

manu

ally

lifting

the

primary

latch

which

disengages

the

tripping

latch

This

allows

the

tripping

latch

rotate

counterclockwise

and

release

the

tripping

cam

that

free

rotate

counterclockwise

Without

the

restraining

force

the

cam

and

cam

links

the

upper

and

lower

trip

free

links

collapse

under

the

force

the

contact

springs

and

the

accelerating

springs

the

puffer

rods

The

junction

these

links

moves

the

right

and

the

trip

free

lever

rotates

clockwise

opening

the

breaker

contacts

The

position

the

linkage

then

shown

the

TRIP

FREE

POSITION

Fig

moving

this

position

the

lower

trip

free

link

presses

the

closing

latch

downward

and

disen

gages

the

non

trip

free

lever

The

trieving

spring

now

pulls

the

solenoid

core

which

moves

the

linkage

and

the

tripping

cam

the

reset

position

shown

Fig

this

position

the

tripping

latch

reset

and

the

breaker

may

reclosed

MECHANISM

PANEL

The

mechanism

panel

mounted

the

front

the

closing

mechanism

shown

Fig

are

mounted

the

following

auxiliary

devices

included

standard

all

breakers

Shunt

Trip

Magnet

The

shunt

trip

magnet

small

electromagnet

which

used

trip

the

Courtesy of NationalSwitchgear.com

OPERATION

FIG

Solenoid

Operating

Mechanism

—

Diagram

Tripping

Positions

Courtesy of NationalSwitchgear.com

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