Westinghouse DB-75 Manual de usuario

Instructions

for

Types

100

and

DBF

Air

Circuit

Breakers

600

volts

250

Volts

Continuous

Current

Rating

100

000

Amperes

000

Amperes

000

Amperes

{

Only

000

Amperes

500

Amperes

000

Amperes

Westinghouse

Electric

Corporation

Switchgear

Division

East

Pittsburgh

850

Effective

November

1966

Supersedes

850

May

1962

Courtesy of NationalSwitchgear.com

’

TABLE

CONTENTS

RECEIVING

HANDLING

AND

STORING

Page

Part

One

Inspection

Storing

INSTALLATION

Pages

Past

Two

Connections

Enclosures

MAINTENANCE

Pages

Part

Three

Pole

Unit

Contacts

Maintenance

Contacts

Operating

Mechanism

Closing

Solenoid

Overcurrent

Tripping

Device

Description

Construction

Installation

and

Removal

Adjustment

Trip

Screw

Operation

Standard

Overcurrent

Tripping

Device

Selective

Overcurrent

Tripping

Device

Instantaneous

Overcurrent

Tripping

Device

(

Single

Element

)

Time

Current

Characteristics

Calibration

Maintenance

Control

Relay

Inspection

Maintenance

Shunt

Trip

Attachment

Inspection

Maintenance

Undervoltage

Trip

Attachment

Undervoltage

Time

Delay

Attachment

Inspection

Maintenance

Auxiliary

Switch

Inspection

Maintenance

(

)

Courtesy of NationalSwitchgear.com

TABLE

Part

Three

MAINTENANCE

(

Continued

)

Pages

Alarm

Switch

Attachment

Inspection

Maintenance

Electric

Lockout

Attachment

Inspection

Maintenance

Key

Lock

Attachment

Inspection

Maintenance

Key

Interlock

Attachment

Inspection

Maintenance

Rectifier

Unit

for

Undervoltage

and

Electric

Lockout

Attachments

Inspection

Maintenance

Reverse

Current

Trip

Attachment

Inspection

Maintenance

Field

Discharge

Switch

Recommended

Spare

Parts

•

(

Courtesy of NationalSwitchgear.com

LIST

ILLUSTRATIONS

Page

Figure

Outline

and

Mounting

Dimensions

100

Outline

and

Mounting

Dimensions

DBF

Outline

and

Mounting

Dimensions

Outline

and

Mounting

Dimensions

Typical

Wiring

Diagrams

Cross

Sectional

View

and

100

Circuit

Breakers

and

100

Three

Position

Operating

Mechanism

Adjusting

Limits

Main

and

Arcing

Contacts

for

and

100

Cir

cuit

Breakers

Closing

Solenoid

—

Construction

Details

Cross

Sectional

View

Overqurrent

Tripping

Device

with

Long

Delay

and

Instantaneous

Elements

Schematic

and

Typical

Time

Current

Characteristics

Overcurrent

Trip

ping

Device

with

Long

Delay

and

Instantaneous

Elements

Cross

Sectional

View

Overcurrent

Tripping

Device

with

Long

Delay

and

Short

Delay

Elements

Selective

Overcurrent

Trip

Operations

Schematic

and

Typical

Time

Current

Characteristics

Overcurrent

Trip

ping

Device

with

Long

Delay

and

Short

Delay

Elements

Schematic

Diagram

Overcurrent

Tripping

Device

with

Instantaneous

Element

Only

Typical

Time

Current

Characteristics

Overcurrent

Tripping

Device

with

Instantaneous

Element

Only

Control

Relay

—

Construction

Details

Shunt

Trip

Attachment

—

Construction

Details

Undervditage

Trip

Attachment

—

Construction

Details

Undervoltdge

Time

Attachment

—

Construction

Details

Auxiliary

Switch

—

Construction

Details

Alarm

Switch

Attachment

—

Construction

Details

Electrical

Lockout

Attachment

—

Construction

Details

Key

Lock

Key

Interlock

Attachment

—

Construction

Details

Rectifier

Unit

for

Undervoltage

and

Electrical

Lockout

Attachments

Reverse

Current

Trip

Attachment

—

Types

and

“

100

Air

Circuit

Breakers

Cross

Section

View

Field

Discharge

Pole

Unit

•

;

v j

Courtesy of NationalSwitchgear.com

850

“

”

AIR

CIRCUIT

BREAKERS

WESTINGHOUSE

AIR

CIRCUIT

BREAKERS

TYPE

Type

air

circuit

breaker

designed

give

continuous

and

reliable

service

the

protective

link

between

the

power

source

and

associated

pro

ductive

equipment

This

breaker

built

operate

with

minimum

main

tenance

while

the

same

time

its

simplified

construction

permits

maximum

accessibility

for

inspection

and

adjustment

when

required

The

ease

with

which

attachments

may

added

removed

outstanding

feature

the

design

For

the

greatest

measure

safety

operating

personnel

and

also

min

imize

maintenance

requirements

the

breaker

should

mounted

enclosure

suitable

local

operating

conditions

selection

standard

enclosures

available

for

various

applications

•

Important

assure

proper

functioning

inspect

each

breaker

reg

ulai

intervals

accordance

with

systematic

maintenance

schedule

The

frequency

and

character

the

inspections

will

for

the

most

part

determined

the

severity

the

duty

performed

The

minimum

requirements

however

should

consist

light

monthly

inspection

with

thorough

inspection

semi

annually

Occasional

checks

cali

bration

well

coordination

and

freedom

all

moving

parts

must

included

the

maintenance

schedule

Consult

Westinghouse

engineering

and

service

personnel

for

recommendations

pertaining

special

operating

maintenance

conditions

Courtesy of NationalSwitchgear.com

IPP

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;

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;

•

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•

;

•

Ifflt

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•

;

’

Siii

;

’

•

mil

;

‘

•

—

•

Courtesy of NationalSwitchgear.com

850

“

”

AIR

CIRCUIT

BREAKERS

PART

ONE

RECEIVING

HANDLING

AND

STORING

TYPES

“

”

AND

“

100

”

AIR

CIR

CUIT

BREAKERS

are

shipped

wooden

crates

with

all

attachments

mounted

place

Important

avoid

damage

the

break

ers

not

use

hooks

handling

Observe

whether

all

parts

are

proper

alignment

and

move

freely

sure

that

the

contacts

are

clean

and

properly

aligned

The

center

finger

the

stationary

arcing

contacts

should

have

slight

lead

The

hinge

end

the

moving

contact

lubricated

with

graphite

grease

and

therefore

black

For

description

contact

alignment

refer

CONTACTS

Page

the

contacts

are

alignment

and

all

parts

move

freely

continue

the

closing

until

the

breaker

latched

Hold

the

maintenance

operating

handle

down

Push

the

Push

Trip

button

trip

breaker

The

toggle

linkage

should

collapse

and

the

moving

contact

assembly

move

freely

the

full

open

position

This

should

followed

complete

resetting

the

links

the

toggle

mechanism

the

handle

raised

The

links

must

always

free

move

with

out

friction

binding

Check

the

attachments

for

operation

accord

ance

with

the

appropriate

instructions

given

under

Maintenance

Part

III

this

book

Note

not

advisable

lubricate

any

parts

the

breaker

The

lubrication

supplied

during

factory

assembly

sufficient

for

years

service

The

lubricant

special

form

which

used

sparingly

The

addition

oil

will

only

promote

the

accumulation

dust

and

dirt

Table

NET

WEIGHTS

POLE

BREAKER

475

lbs

(

Add

lbs

for

)

100

525

lbs

(

Add

lbs

for

)

DBF

550

lbs

(

Add

lbs

for

)

Immediately

upon

receipt

examine

shipment

for

any

loss

damage

incurred

during

shipment

injury

rough

handling

evident

file

damage

claim

once

with

the

transportation

company

and

notify

the

nearest

Westinghouse

Sales

Office

When

unpacking

sure

that

loose

parts

are

missing

left

the

packing

material

Report

all

shortages

once

Blow

out

any

dust

particles

packing

material

that

may

have

accumulated

the

circuit

breaker

parts

INSPECTION

The

breaker

assembly

consists

dinated

group

assemblies

mounted

sup

porting

panel

The

complete

breaker

assembly

mounted

with

the

panel

vertical

position

All

inspections

for

proper

operation

should

therefore

made

with

the

breaker

this

position

Final

spection

should

preferably

made

with

the

break

its

permanent

mounting

Inspect

the

breaker

follows

Lift

trip

finger

hand

make

sure

that

does

not

bind

Remove

any

foreign

particles

from

the

hinge

end

the

moving

contacts

Insert

the

maintenance

operating

handle

and

slowly

the

breaker

STORING

circuit

breakers

are

not

installed

their

permanent

locations

once

they

should

care

fully

inspected

for

loose

damaged

parts

and

then

stored

clean

dry

place

upright

position

avoid

damage

the

circuit

breaker

parts

covering

paper

will

prevent

dust

from

settling

the

circuit

breaker

parts

and

preferred

packing

other

materials

which

are

apt

absorb

moisture

FOR

SAFETY

REASONS

STORE

THE

BREAKER

THE

OPEN

POSITION

Courtesy of NationalSwitchgear.com

PART

TWO

INSTALLATION

CONNECTIONS

Type

circuit

breakers

are

furnished

complete

unit

assemblies

and

the

installation

con

sists

(

)

bolting

them

the

supporting

frame

work

structure

;

(

)

connecting

the

current

carry

ing

cables

bus

bars

;

and

(

)

completing

any

secondary

control

wiring

that

may

necessary

Caution

During

installation

the

circuit

breaker

should

the

open

position

sure

energize

the

load

and

control

leads

connected

and

also

the

section

the

switchboard

where

installation

being

made

Mounting

dimensions

and

details

the

front

closure

cutouts

are

shown

Figs

and

prevent

distortion

the

breaker

panel

the

supporting

structure

should

checked

for

align

ment

Magnetic

material

the

mounting

structure

should

have

least

two

inches

clearance

the

breaker

studs

manual

closing

handle

supplied

with

each

order

and

100

breakers

This

handle

for

maintenance

only

and

case

should

used

for

closing

the

breaker

when

primary

circuit

energized

Typical

circuit

breaker

wiring

diagrams

are

shown

Fig

The

connecting

cables

bus

bars

should

have

adequate

current

carrying

capacity

heat

will

conducted

the

circuit

breaker

resulting

possible

excessive

temperature

rise

Connecting

cables

bus

bars

must

supported

that

the

circuit

breaker

studs

will

not

subjected

unnecessary

stresses

ENCLOSURES

The

breaker

normally

mounted

the

enclosure

along

with

accompanying

bus

work

terminating

cable

clamps

Where

covers

are

mounted

closures

they

are

removed

and

drilled

provide

for

connecting

cable

All

connections

should

clean

smooth

and

free

from

burrs

assume

full

contact

area

They

should

firmly

clamped

bolted

place

prevent

excessive

heating

Cable

must

adequately

braced

withstand

full

short

circuit

currents

)

;

•

Courtesy of NationalSwitchgear.com

850

INSTALLATION

“

”

AIR

CIRCUIT

BREAKERS

•

••

FIG

Type

100

Air

Circuit

Breaker

Outline

and

Mounting

Dimensions

Courtesy of NationalSwitchgear.com

INSTALLATION

•

‘

;

FIG

Typo

Air

Circuit

Breaker

Fixed

Outline

and

Mounting

Dimensions

Courtesy of NationalSwitchgear.com

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