Abb Vhk-r Installation and operating instructions

Table of contents

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IB

6.2

.

7.7

-

4

C

Installation

/

Maintenance

Instructions

Medium

-

Voltage

Vacuum

Power

Circuit

Breakers

Type

VHK

-

R

250

,

500

and

750

MVA

1200

/

2000

Amperes

5000

-

15000

Volts

(

Shown

on

manufacturing

wheel

channels

)

JL

IIII

#

MPII

ABB

Power

Distribution

,

Inc

.

Circuit

Breaker

Division

ASEA

BROWN

BOVERI

Courtesy of NationalSwitchgear.com

ID

Page

2

MIPIP

ASEA

BROWN

BOVERI

*

1

CONTENTS

PAGE

INTRODUCTION

RECEIVING

AND

STORAGE

CIRCUIT

BREAKER

GENERAL

INFORMATION

Installation

Inspection

Vacuum

Interrupter

Examination

Insulation

Structure

Manual

Operation

of

Electrically

Operated

Models

MAINTENANCE

:

ADJUSTMENTS

AND

TESTS

General

Information

Millivolt

Drop

Test

Insulation

Cleaning

Circuit

Breaker

Operation

,

Contact

Adjustment

and

Timing

Contact

Adjustment

Closing

and

Opening

Times

and

Speeds

Operating

Mechanism

Latch

Engagement

(

Bite

)

Control

Relay

Adjustment

LUBRICATION

DIELECTRIC

TESTS

ELECTRICAL

CHARACTERISTICS

ELECTRICAL

OPERATING

SEQUENCE

DC

Operating

Sequence

DC

Schematic

Diagram

of

Control

Circuit

AC

Operating

Sequence

AC

Schematic

Diagram

of

Control

Circuit

RENEWAL

PARTS

3

3

3

3

3

3

5

5

5

5

5

6

6

6

7

7

7

8

8

9

9

••••

••

•

••••

•

•

•••

a

9

10

11

12

13

:

These

instructions

o

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pc

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;

.

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:

*

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:

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Of

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non

;

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.

Courtesy of NationalSwitchgear.com

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.

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.

.

«

•

#

—

TVs

MIMP

Page

3

ASEA

BROWN

BOVERI

be

lockwired

to

allow

closing

of

the

breaker

for

shipment

.

A

tag

will

identify

the

lock

wire

.

To

remove

the

wire

,

open

the

breaker

and

reach

behind

the

control

panel

from

the

right

hand

side

.

Using

wire

cutters

,

cut

and

remove

the

tagged

wire

.

INTRODUCTION

These

instructions

for

installation

,

operation

and

maintenance

of

VHK

-

R

series

vacuum

circuit

breakers

should

be

read

carefully

and

used

as

a

guide

during

installation

and

initial

operation

.

The

specific

ratings

of

each

model

circuit

breaker

are

listed

on

the

individual

nameplates

.

WARNINGS

WA

1

mm

File

these

instructions

in

a

readily

accessible

place

together

with

drawings

and

descriptive

data

of

the

switchgear

.

These

instruc

-

tions

will

be

a

guide

to

proper

maintenance

of

the

equipment

and

prolong

its

life

and

usefulness

.

Prior

to

any

disassembly

or

insoecticn

of

the

circuit

breaker

,

the

closing

springs

should

be

discharged

,

and

the

breaker

shcuid

be

open

.

Installation

Inspection

RECEIVING

AND

STORAGE

Inspect

the

condition

of

circuit

breaker

vacuum

interrupters

and

electrical

connections

prior

to

installing

the

circuit

breaker

into

the

switchboard

.

Even

though

each

circuit

breaker

is

completely

adjusted

and

tested

at

the

factory

,

shipping

and

handling

condi

-

tions

could

cause

defects

.

Immediately

upon

receipt

of

the

circuit

breakers

,

examine

the

cartons

to

determine

if

any

damage

or

loss

was

sustained

during

transit

.

If

abuse

or

rough

handling

is

evident

,

file

a

damage

claim

at

once

with

the

carrier

and

promptly

notify

the

nearest

District

Office

.

The

company

is

not

responsible

for

damage

of

goods

after

delivery

to

the

carrier

,

however

,

we

will

lend

assistance

if

notified

of

claims

.

Vacuum

Interrupter

Examination

(

See

Fig

.

1

)

f

>

[

-

310

*

»

Unpack

the

circuit

breakers

as

soon

as

possible

after

receipt

.

If

unpacking

is

delayed

,

difficulty

may

be

experienced

in

making

a

claim

for

damages

not

evident

upon

receipt

.

Use

care

in

unpack

-

ing

in

order

to

avoid

damaging

any

of

the

circuit

breaker

parts

.

Check

the

contents

of

each

carton

against

the

packing

list

before

discarding

any

packing

material

.

If

any

shortage

of

material

is

discovered

,

promptly

notify

the

nearest

District

Office

.

Informa

-

tion

specifying

the

purchase

order

number

and

part

numbers

of

the

damaged

or

missing

parts

should

accompany

the

claim

.

:

v

k

grounding

stick

snouid

be

usee

to

ciscnarge

the

mid

-

banc

on

me

vacuum

interrupters

(

1

)

so

sou

ooad

.

before

snv

vc

cone

cr

.

the

interrupters

.

The

insulated

vacuum

envelope

(

2

)

should

be

examined

carefully

for

cracks

in

the

area

of

the

metal

-

to

-

insulation

seals

on

both

ends

and

around

the

mid

-

band

ring

.

Since

a

certain

amount

of

transmitted

light

is

usually

required

to

detect

cracks

,

the

inspec

-

tion

should

be

done

in

a

well

lighted

area

.

If

the

mid

-

band

ring

,

when

so

equipped

,

has

been

bent

by

an

accidental

impact

,

that

area

should

be

specially

scrutinized

for

seal

damage

.

Small

external

chips

will

not

impair

the

useful

life

of

the

interrupter

.

Circuit

breakers

should

be

installed

in

their

permanent

location

as

soon

as

possible

.

If

the

breakers

are

not

to

be

placed

in

service

for

some

time

,

it

is

advisable

to

provide

adequate

means

of

protection

.

This

may

be

done

by

keeping

the

breaker

in

its

original

shipping

carton

and

storing

in

a

warm

,

dry

and

uncontaminated

atmosphere

.

If

the

circuit

breaker

cannot

be

stored

properly

,

it

must

be

thoroughly

checked

before

going

into

service

to

insure

it

has

not

absorbed

moisture

,

rusted

or

become

generally

contami

-

nated

in

any

way

.

Insulation

Structure

All

insulated

parts

should

be

checked

for

damage

.

Any

dust

or

dirt

should

be

removed

by

air

or

wiped

with

a

clean

lintless

cloth

.

The

lead

support

moldings

are

polyester

glass

and

occasionally

have

some

resin

rich

cracks

or

crazing

develop

.

These

do

not

indicate

defective

material

and

should

not

cause

concern

.

CIRCUIT

BREAKER

GENERAL

INFORMATION

Prior

to

initial

installation

of

the

circuit

breaker

into

the

switch

-

board

,

certain

preliminary

inspections

should

be

made

to

insure

proper

operation

.

The

inspection

procedures

for

this

are

given

in

this

section

.

NOTE

:

It

is

recommended

that

a

dielectric

withstand

test

be

made

prior

to

putting

this

or

any

type

vacuum

circuit

breaker

into

service

.

Refer

to

Dielectric

Tests

,

in

the

Maintenance

,

Adjustments

and

Tests

section

of

this

bulletin

,

for

the

correct

test

procedure

.

The

circuit

breaker

is

shipped

with

contacts

closed

,

closing

springs

discharged

and

opening

springs

charged

.

If

the

circuit

breaker

is

furnished

with

an

undervoltage

device

,

the

device

will

Courtesy of NationalSwitchgear.com

V

tea

a

a

a

Page

4

MW

IP

ASEA

BROWN

SOVERI

A

4

SPRING

STATUS

INDICATOR

7

MOTOR

POWER

CON

’

ROL

SWITCH

r

MANUAL

TRIP

I

-

0

CA

_

—

ELECTRIC

:

1

CLOSE

/

'

RIP

(

OPTIONAL

)

MANUAL

CLOSE

“

1

-

r

\

o

n

OPERATIONS

COUNTER

ir

OPEN

/

CLOSE

II

INDICATOR

yth

'

MANUAL

CHARGE

POR

”

~

U

N

_

l

W

L

°

©

©

j

4

Fig

.

2

-

Front

Circuit

Breaker

Panel

&

Accessories

(

See

Detail

2

A

)

Fig

.

1

-

Circuit

Breaker

Rear

-

5

KV

breaker

shown

.

Lower

leads

for

15

KV

breaker

are

slightly

higher

Detail

2

A

-

Manual

Charging

Of

Electrically

Operated

Circuit

Breakers

Fig

.

3

-

Contact

Pressure

Courtesy of NationalSwitchgear.com

II

»

11

MIPIP

ID

Page

5

ASEA

BROWN

BOVERI

If

,

however

after

the

first

inspection

period

there

is

no

indication

of

any

problems

,

actual

operating

experience

with

specific

circuits

will

indicate

the

future

amount

of

maintenance

needed

for

the

various

circuit

breakers

and

the

procedure

can

be

modified

as

required

.

Manual

Operation

of

Electrically

Operated

Models

Electrically

operated

circuit

breakers

may

be

charged

manually

by

a

removable

maintenance

handle

for

bench

tests

or

emer

-

gency

operation

.

To

manually

charge

the

closing

springs

,

first

position

the

maintenance

handle

hooked

section

in

the

long

slot

on

the

pawl

carrier

(

Refer

to

Figure

2

)

.

The

small

tab

on

the

maintenance

handle

will

fit

the

small

hole

of

the

pawl

carrier

.

Using

a

pumping

motion

,

rotate

the

pawl

carrier

until

the

ratchet

wheel

no

longer

rotates

.

At

this

point

,

the

spring

charged

in

-

dicator

will

indicate

SPRINGS

CHARGED

.

The

circuit

breaker

can

be

closed

manually

with

the

manual

close

lever

.

NOTE

:

Occasionally

the

motor

crank

arm

will

stop

in

a

position

that

will

not

allow

manual

spring

charging

.

When

this

happens

,

the

motor

crank

arm

must

be

rotated

manually

by

using

a

screwdriver

to

rotate

the

crank

arm

sufficiently

so

that

the

springs

may

then

be

manually

charged

with

the

maintenance

handle

.

Where

unusual

service

conditions

exist

,

as

covered

by

ANSI

Standard

C

37.04

,

it

must

be

presumed

thatthese

conditions

were

considered

at

the

time

of

order

and

that

the

equipment

supplied

was

designed

for

the

special

application

and

that

an

appropriate

supplemental

maintenance

program

has

been

developed

.

These

maintenance

instructions

only

cover

circuit

breakers

used

under

the

standard

service

conditions

.

At

the

selected

maintenance

period

,

the

following

tests

and

adjustments

should

be

made

:

NOTE

:

The

following

tabulated

tests

and

adjustments

are

all

that

are

normally

necessary

for

proper

maintenance

and

operation

of

theVHK

-

R

circuit

breaker

.

The

remaining

portions

of

the

breaker

-

close

coil

assembly

,

shunt

trip

device

,

control

relay

,

auxiliary

switch

and

motor

--

require

no

maintenance

during

the

standard

life

of

the

circuit

breaker

regardless

of

the

operating

duty

.

MAINTENANCE

,

ADJUSTMENTS

AND

TESTS

General

Information

The

VHK

-

R

circuit

breakers

are

designed

for

minimum

mainte

-

nance

and

tested

to

insure

that

only

minimum

maintenance

will

be

required

.

The

few

adjustments

that

are

noted

are

required

only

when

an

operational

check

indicates

a

problem

.

Of

course

,

during

the

maintenance

checks

,

all

accessible

bolts

,

units

and

screws

should

be

routinely

checked

to

insure

that

they

are

tight

.

D

.

C

.

Millivolt

Drop

Test

During

maintenance

periods

,

the

condition

of

the

breaker

current

circuit

can

easily

be

determined

by

performing

a

millivolt

droptest

.

This

test

should

be

performed

regardless

of

whether

the

circuit

breaker

had

interrupted

low

or

high

currents

or

has

minimum

operations

.

It

is

recommended

that

the

circuit

breaker

be

normally

inspected

after

the

first

2000

operations

,

regardless

of

the

type

of

duty

it

is

used

for

.

These

operations

can

be

either

no

-

load

mechanical

,

load

current

switching

,

bulk

capacitor

or

reactor

switching

opera

-

tions

,

or

for

motor

starting

applications

.

The

following

table

lists

the

millivolt

drop

and

resistance

values

for

the

circuit

breakers

covered

by

this

instruction

book

,

from

term

inal

to

terminal

,

exclusive

of

the

primary

disconnects

.

Vacuum

interrupters

,

as

used

on

the

VHK

-

R

circuit

breakers

,

have

an

inherently

long

contact

life

and

will

provide

trouble

-

free

service

under

varied

application

conditions

,

as

long

as

the

circuit

breaker

is

applied

within

its

rating

.

The

wear

condition

of

the

individual

vacuum

interrupters

will

vary

,

depending

on

circuit

conditions

and

such

variables

as

single

phase

versus

three

-

phase

interruption

,

X

/

R

ratio

(

asymmetry

)

and

relay

delay

times

.

Of

course

,

interrupting

high

short

-

circuit

current

will

cause

contact

erosion

to

occur

faster

than

load

current

interruptions

.

The

interrupters

for

the

VHK

-

R

Circuit

Breakers

are

tested

up

to

2000

%

KSI

.

It

is

unlikely

that

a

circuit

breaker

will

be

subjected

to

this

much

duty

during

the

life

of

the

breaker

and

it

is

not

expected

that

the

interrupters

will

have

to

be

replaced

due

to

excessive

erosion

of

contacts

.

There

is

,

however

,

a

check

for

contact

wipe

(

contact

pressure

)

which

is

also

a

measure

of

contact

erosion

.

This

check

is

covered

under

"

Circuit

Breaker

Operation

and

Contacts

"

.

When

contact

wipe

is

less

than

the

minimum

specified

and

there

is

not

a

mechanical

problem

,

then

the

interrupter

should

be

replaced

due

to

contact

erosion

.

MV

:

;;

iDtopil

Maximum

Mte

^

Ohms

CIrcul

Breaker

250

1200

Ampere

8

40

*

Millivolt

drop

with

20

(

fcmperes

DC

flowing

.

Insulation

Cleaning

Any

dirt

,

dust

or

grease

should

be

removed

from

the

surfaces

of

the

entire

current

carrying

structure

and

vacuum

interrupter

*

.

Wiping

the

surface

with

a

clean

lint

free

cloth

is

normally

sufficient

for

this

purpose

.

Courtesy of NationalSwitchgear.com

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•

Remember

to

discharge

mid

-

band

ring

on

interrupters

so

equipped

.

d

.

The

air

gap

is

the

difference

between

the

two

measure

-

ments

.

The

acceptable

limits

are

.

375

-

.

500

,

with

the

upper

limit

being

approached

as

contact

wipe

approaches

the

minimum

.

Circuit

Breaker

Operation

,

Contact

Adjustment

and

Timing

Contact

Adjustment

5

.

Contact

Sequence

Check

(

See

Fig

.

3

)

.

All

three

poles

should

touch

within

2

millisecond

at

normal

closing

speeds

.

An

oscillo

-

scope

,

oscillograph

or

other

timing

method

may

be

used

to

establish

the

2

millisecond

timing

.

1

.

To

check

breaker

operation

,

the

breaker

should

be

withdrawn

from

the

switchboard

,

and

the

racking

screw

turned

two

to

three

turns

clockwise

until

the

racking

unlocking

lever

snaps

into

the

first

position

corresponding

to

the

disconnect

position

.

Before

checking

contact

sequence

,

check

that

the

contact

wipe

and

air

gaps

are

correct

.

It

is

not

expected

that

the

contact

sequence

should

exceed

the

2

millisecond

limit

;

therefore

,

before

attempting

to

readjust

,

check

that

the

test

equipment

and

proce

-

dure

are

correct

.

Also

consider

,

especially

when

testing

with

electronic

equ

ipment

,

that

.

002

seconds

vacu

urn

interrupter

contact

bounce

is

permissible

during

normal

closing

and

this

bounce

can

influence

the

contact

touch

measurements

.

2

.

Fully

Closed

Breaker

Test

(

See

Fig

.

2

)

.

Charge

the

closing

springs

and

turn

the

motor

switch

(

1

)

off

.

Close

the

breaker

.

Engage

manual

charge

handle

with

charging

lever

(

3

)

.

During

the

initial

portion

of

the

downward

stroke

of

the

handle

check

to

see

which

direction

the

closing

spring

guides

move

.

If

the

spring

guides

start

to

move

out

then

the

breaker

did

fully

close

.

If

the

spring

guides

begin

to

move

in

and

with

additional

pumping

moves

in

until

the

mechanism

can

be

heard

to

"

snap

in

"

,

then

the

breaker

did

not

fully

close

originally

.

Excess

contact

pressure

or

friction

can

cause

this

condition

and

if

it

cannot

be

relieved

then

the

factory

should

be

consulted

.

If

it

is

determined

that

the

contact

sequence

is

not

within

the

2

milliseconds

,

then

adjustment

is

required

.

Usually

,

readjustment

of

one

pole

should

be

sufficient

so

that

all

three

poles

touch

within

2

milliseconds

.

The

air

gap

of

the

pole

to

be

changed

should

be

decreased

if

the

contacts

of

that

pole

are

touching

after

the

other

two

poles

,

or

increased

if

the

contacts

are

touching

before

the

other

two

poles

.

The

air

gap

is

decreased

by

turning

pushrod

(

2

)

clockwise

,

viewing

from

the

top

of

the

breaker

,

and

increased

by

turning

conterclockwise

.

3

.

Contact

Wipe

(

contact

pressure

)

Check

(

See

Fig

.

3

)

.

The

contact

air

gap

and

contact

wipe

is

set

at

the

factory

by

setting

the

vertical

position

of

the

interrupter

(

1

)

and

the

vertical

position

of

the

pushrod

(

2

)

.

These

parts

should

not

be

repositioned

in

the

field

unless

a

pushrod

change

is

required

to

correct

contact

sequence

as

described

elsewhere

.

Contact

wipe

is

set

at

the

factory

at

.

093

minimum

.

Contact

erosion

and

wear

in

mechanical

parts

will

cause

a

reduction

in

contact

wipe

over

the

life

of

the

breaker

and

a

check

should

be

made

to

insure

that

the

wipe

is

not

less

than

.

020

"

.

The

measurement

is

made

as

follows

forthe

three

poles

:

1

/

4

turn

of

the

pushrod

(

2

)

will

change

the

air

gap

by

approx

.

.

019

.

After

rotating

the

pushrod

,

carefully

reposition

the

moving

contact

and

pushrod

vertically

to

align

the

pin

holes

.

Replace

the

pin

and

retainer

.

During

the

readjustment

procedure

note

that

the

contact

wipe

and

air

gap

dimensions

,

specified

previously

,

must

be

maintained

.

No

more

than

1

/

2

turn

total

of

the

pushrod

should

be

required

when

readjusting

for

contact

sequence

.

a

.

Close

the

breaker

and

measure

between

the

spring

base

and

nut

(

point

A

)

,

using

gage

pin

.

After

completing

the

contact

sequence

procedure

,

recheck

the

contact

wipe

and

air

gaps

.

b

.

The

measurement

with

the

breaker

open

should

be

at

least

.

093

for

a

new

breaker

.

Return

the

racking

screw

to

its

original

position

by

turning

it

counterclockwise

approx

,

two

to

three

turns

until

it

stops

.

c

.

When

contact

wipe

is

less

than

the

.

020

and

it

has

been

determined

that

the

breaker

closes

fully

and

there

is

not

a

mechanical

problem

,

then

the

interrupter

should

be

re

-

placed

due

to

contact

erosion

.

Closing

and

Opening

Times

and

Speeds

After

the

operation

intervals

noted

previously

,

the

closing

and

opening

times

are

recommended

to

be

checked

by

use

of

a

cycle

counter

,

travel

recorder

*

,

oscillograph

,

etc

.

to

monitor

the

time

from

energizing

to

contacts

touch

or

part

.

4

.

Contact

Air

Gap

Check

(

See

Fig

.

3

)

.

The

contact

air

gap

is

set

at

the

factory

at

the

nominal

dimension

of

.

40

.

This

value

will

normally

increase

as

the

contacts

erode

.

A

check

of

the

contact

air

gap

checks

that

the

breaker

does

open

fully

and

that

the

gap

is

sufficient

to

withstand

the

applied

voltage

.

The

measurement

is

made

as

follows

for

the

three

poles

.

*

A

potentiometer

with

mounting

support

,

used

in

conjunction

with

an

oscilloscope

or

oscillograph

,

and

instructions

are

available

on

special

orderfor

specifically

checking

opening

and

closing

speeds

.

a

.

Open

the

breaker

and

discharge

the

closing

springs

.

b

.

Measure

and

record

the

dimension

between

the

top

sur

-

face

of

the

flex

connector

clamp

and

the

lead

mounting

bracket

.

c

.

Close

the

breaker

,

measure

and

record

the

same

dimen

-

sion

.

Courtesy of NationalSwitchgear.com

a

ii

it

MIPIP

ID

0

.

Z

.

/

.

/

-

4

U

Page

7

ASEA

BROWN

BOVERI

Latch

Engagement

(

Bite

) (

Refer

to

Fig

.

4

)

The

circuit

breaker

closing

and

opening

times

should

be

within

the

following

time

ranges

for

normal

operation

.

The

latch

engagement

adjusting

screw

(

3

)

is

located

to

the

right

of

the

right

-

hand

mechanism

housing

(

1

)

.

It

can

be

reached

easily

from

the

top

of

the

circuit

breaker

.

Opening

Time

poeihgillmfi

To

adjust

the

latch

(

2

)

engagement

,

proceed

as

follows

:

25

-

35

40

-

60

1

.

Backoff

adjusting

screw

(

3

)

to

assure

excessive

latch

engage

-

ment

.

NOTES

:

2

.

Close

the

circuit

breaker

.

1

.

Below

0

°

C

,

the

closing

times

will

increase

(

but

with

no

reduction

in

closing

force

)

;

and

opening

times

will

be

within

the

limits

.

3

.

Turn

adjusting

screw

(

3

)

down

slowly

until

the

latch

just

releases

,

tripping

the

circuit

breaker

.

2

.

Adjustments

to

correct

speeds

,

if

found

to

be

outside

limits

,

are

critical

and

the

nearest

District

Office

should

be

contacted

for

recommendations

.

4

.

Back

off

the

adjusting

screw

(

3

)

2

turns

.

Control

Device

(

See

Fig

.

5

)

Operating

Mechanism

The

control

device

is

adjusted

before

leaving

the

factory

.

It

is

recommended

that

no

attempt

be

made

to

adjust

the

internal

relays

and

contacts

of

this

device

in

the

field

.

If

replacement

of

the

control

device

is

required

,

the

close

latch

release

rod

(

5

)

overtravel

may

be

adjusted

as

described

below

.

The

various

mechanism

adjustments

described

in

the

following

sections

apply

to

all

circuit

breakers

covered

by

this

Instruction

Bulletin

.

1

.

Back

off

on

close

latch

release

rod

(

5

)

and

check

that

the

circuit

breaker

will

not

close

by

attempting

to

close

it

electrically

or

manually

pushing

up

on

close

latch

release

rod

(

5

)

to

the

full

extent

of

its

travel

.

2

.

Charge

the

closing

springs

.

Push

up

on

close

latch

release

rod

(

5

)

to

the

full

extent

of

its

travel

.

While

holding

the

close

latch

1

.

Mechanism

Housing

2

.

Latch

3

.

Adjusting

Screw

£

2

A

/

/

5

/

IN

UZ

-

ID

1

.

ROLLER

.

CLOSE

LATCH

2

.

CHARGING

CAM

3

.

ACTUATOR

.

LIMIT

SWITCH

5

.

CLOSE

LATCH

RELEASE

ROO

6

.

SPRING

.

CLOSE

LATCH

RELEASE

ROD

7

.

SECONDARY

CLOSE

LATCH

8

.

PRIMARY

CLOSE

LATCH

Fig

.

4

-

Latch

Adjustment

Fig

.

5

-

Control

Device

Adjustment

Courtesy of NationalSwitchgear.com

ii

mi

nvp

lb

b

.

2

.

/

.

/

-

4

U

Page

8

ASEA

BROWN

BOVERI

1

.

The

internal

shield

of

a

vacuum

interrupter

can

acquire

an

electrical

charge

which

is

usually

retained

even

after

the

voltage

is

removed

.

On

certain

types

of

interrupters

,

this

shield

is

attached

to

the

exposed

mid

-

band

ring

and

a

grounding

stick

should

be

used

to

discharge

the

ring

before

working

on

the

device

.

LUBRICATION

The

VHK

-

R

circuit

breakers

are

lubricated

during

factory

assem

-

bly

as

follows

:

1

.

The

primary

disconnect

contacts

have

been

lubricated

with

NO

-

OX

-

ID

special

grade

-

A

grease

manufactured

by

Sanchem

,

Inc

.

(

ABB

No

.

713222

A

,

1

Pt

.

can

)

.

2

.

Dielectric

test

voltages

higher

than

rated

voltage

,

applied

across

open

contacts

,

may

cause

a

vacuum

interrupter

to

emit

some

X

-

radiation

which

could

be

a

health

hazard

on

prolonged

exposure

at

close

range

.

Accordingly

,

even

though

the

emission

is

low

and

on

for

such

a

short

period

of

time

,

it

is

considered

appropriate

to

exercise

caution

.

2

.

All

other

mechanism

parts

,

bearings

,

pins

,

etc

.

,

have

been

lubricated

with

Anderol

757

manufactured

by

Nuodex

,

Inc

.

(

for

-

merly

Tenneco

Chemical

,

Inc

)

.

(

ABB

No

.

712994

A

,

4

oz

.

tube

)

.

Therefore

,

do

not

run

any

primary

circuit

dielectric

withstand

tests

on

isolated

interrupters

with

open

contacts

,

above

rated

voltage

unless

tost

personnel

are

adequately

shielded

or

they

are

no

less

than

six

feet

from

the

test

unit

.

If

the

grease

should

become

contaminated

or

unduly

oxidized

(

hardened

and

darkened

)

or

if

parts

are

replaced

,

any

relubrica

-

tion

should

be

done

with

the

lubricants

noted

.

NOTES

:

It

isnoted

that

NO

hazardous

X

-

radiation

is

produced

with

closed

contacts

at

any

test

voltage

or

with

open

contacts

at

rated

voltage

and

there

should

be

no

cause

for

concern

.

Further

,

if

the

breaker

is

tested

in

its

switchgear

compartment

,

the

enclosure

steel

provides

sufficient

shielding

to

protect

personnel

from

X

-

radiation

at

the

test

voltages

recommended

below

at

the

normal

distances

maintained

for

electrical

safety

.

1

.

It

is

recommended

that

the

primary

disconnects

be

maintained

by

renewing

the

grease

.

The

mechanism

should

be

periodically

inspected

for

lubrication

contamination

;

frequency

of

inspection

is

dependant

on

operating

environment

.

2

.

Do

not

use

light

oil

to

lubricate

any

mechanism

parts

.

In

emergency

situations

,

Anderol

732

may

be

used

as

a

temporary

lubricant

.

In

these

cases

,

allow

time

for

the

solvents

to

evaporate

prior

to

any

mechanical

operations

.

It

is

mandatory

that

the

breaker

undergo

thorough

lubrication

with

Anderol

757

atthe

next

maintenance

interval

.

Use

of

solvents

to

free

contaminated

lubricant

is

strictly

forbidden

without

immediate

relubrication

using

Anderol

757

.

Note

that

bearing

surfaces

must

be

repacked

and

this

will

require

disassembly

of

the

mechanism

.

Do

not

operate

circuit

breaker

without

completing

this

procedure

.

The

following

test

values

should

be

used

for

dielectric

testing

the

new

breaker

and

are

to

be

applied

for

a

one

-

minute

period

.

Deicrlptfoi

60

Hz

Primary

Circuit

19.0

kV

5

KV

3

.

The

charging

motor

is

sealed

and

no

lubrication

is

required

.

*

Secondary

Circuit

(

Control

)

1100

V

36.0

kV

Primary

Circuit

15

KV

DIELECTRIC

TESTS

1100

V

*

Secondary

Circuit

(

Control

)

It

is

recommended

that

dielectric

withstand

tests

be

made

priorto

use

and

then

at

routine

maintenance

periods

to

verify

the

integrity

of

vacuum

interrupters

.

If

,

during

the

dielectric

withstand

test

,

the

required

test

voltage

cannot

be

sustained

across

the

open

con

-

tacts

of

the

vacuum

interrupter

,

the

interrupter

is

faulty

and

must

be

replaced

.

Always

insure

that

the

contact

air

gap

is

correct

before

conducting

primary

circuit

dielectric

tests

.

Once

in

service

,

the

primary

circuit

should

be

tested

at

75

%

of

this

rating

*

lf

it

is

desired

to

make

a

dielectric

test

on

the

secondary

control

wiring

,

turn

the

spring

charging

motor

disconnect

switch

(

1

,

Fig

.

3

)

to

the

"

OFF

"

position

.

Apply

test

voltage

(

1100

V

-

AC

)

for

one

minute

to

each

of

the

secondary

disconnect

contacts

at

the

rear

of

the

circuit

breaker

.

’

*

1

>

1

*

vh

TJ

f

?

»

,

If

it

is

desired

to

make

a

dielectric

test

on

the

spring

charging

motor

,

turn

the

motor

disconnect

switch

(

1

,

Fig

.

3

)

to

the

"

ON

"

position

.

Apply

test

voltage

(

540

V

-

AC

)

for

one

m

in

ute

to

the

motor

circuit

.

<

2

.

/

-

-

:

Ol

-

a

.

\

irvare

are

:

wo

.

.

^

vfr

-

*

t

!

suwiitf

cry

*

LISA

:

r

-

*

|

•

_

.

w

i

*

i

.

i

I

.

.

J

I

.

*

»

•

Courtesy of NationalSwitchgear.com

ID

U

.

*

.

.

#

.

/

-

HU

Pago

9

MIPIP

ASEA

BROWN

BOVERI

3

.

When

the

springs

discharge

,

limit

switch

contact

"

LSb

"

closes

and

switch

contact

"

LSa

"

opens

.

ELECTRICAL

CHARACTERISTICS

OF

CONTROL

DEVICES

4

.

When

limit

switch

"

LSb

"

in

the

motor

circuit

closes

,

the

spring

charging

motor

is

energized

,

which

in

turn

recharges

the

closing

springs

.

For

operating

voltage

ranges

for

various

nominal

control

volt

-

ages

,

refer

to

Table

1

.

For

average

current

values

at

various

nominal

control

voltages

,

ref

er

to

Table

2

.

The

current

values

given

in

this

table

are

average

,

steady

state

values

and

momentary

inrush

currents

for

all

charg

-

ing

motors

and

AC

coils

are

approximately

six

to

eight

times

these

values

.

5

.

Whenthecircuit

breaker

closes

,

all

auxiliary

switch

"

b

"

contacts

open

and

all

auxiliary

switch

"

a

"

contacts

close

.

6

.

When

the

limit

switch

contact

"

LSb

"

closes

,

the

lockout

relay

coil

(

Y

)

is

energized

and

opens

lockout

relay

contact

"

Yb

"

,

which

deenergizes

the

latch

release

coil

(

X

)

.

Lockout

relay

contact

"

Ya

"

closes

,

which

seals

-

in

the

lockout

relay

coil

(

Y

)

as

long

as

the

"

close

"

contact

is

maintained

.

The

purpose

of

the

lockout

relay

coil

(

Y

)

is

to

prevent

pumping

of

the

closing

mechanism

when

closing

against

a

faulted

circuit

.

ELECTRICAL

OPERATING

SEQUENCE

Please

refer

to

the

specific

schematic

diagrams

and

other

opera

-

tional

information

furnished

with

your

order

.

7

.

After

the

breaker

has

closed

and

when

the

"

close

"

switch

is

released

by

the

operator

,

the

lockout

relay

coil

(

Y

)

is

deenergized

.

This

allows

the

normally

-

closed

lockout

relay

contact

"

Yb

"

to

close

,

and

the

normally

-

open

lockout

relay

contact

"

Ya

"

to

open

.

Figure

10

and

11

are

provided

as

typical

schematics

for

general

information

on

electrical

operation

.

DC

CLOSING

OPERATING

SEQUENCE

8

.

The

circuit

breaker

can

be

tripped

by

operation

of

the

trip

control

switch

which

energizes

the

circuit

breaker

trip

coil

(

TC

)

through

the

auxiliary

switch

"

a

"

contact

.

With

the

circuit

breaker

open

,

the

closing

springs

uncharged

,

and

the

control

power

source

energized

,

and

motor

disconnect

switch

closed

,

operation

occurs

as

follows

:

9

.

The

undervoltage

device

,

if

furnished

,

provides

a

direct

acting

lock

-

open

and

undervoltage

tripping

feature

.

This

device

must

be

energized

to

initially

close

the

breaker

,

and

also

to

maintain

the

breaker

in

a

closed

position

.

1

.

Immediately

upon

the

availability

of

control

power

,

the

spring

charging

motor

(

motor

)

is

energized

,

which

in

turn

charges

the

closing

springs

.

When

the

closing

springs

are

charged

,

limit

switch

contact

"

LSb

"

is

opened

,

and

limit

switch

contact

"

LSa

"

is

closed

.

10

.

The

latch

check

switch

,

if

furnished

,

insures

that

the

tripping

mechanism

must

be

reset

prior

to

energizing

the

closing

latch

release

coil

(

X

)

.

2

.

Operation

of

the

Close

Control

switch

energizes

the

latch

re

-

lease

coil

(

X

)

through

the

circuit

breaker

auxiliary

switch

"

b

"

contact

,

the

normally

closed

lockout

relay

contact

"

Yb

"

,

and

the

limit

switch

contact

"

LSa

"

.

The

latch

release

coil

(

X

)

releases

the

closing

latch

.

The

springs

then

discharge

to

close

the

circuit

breaker

.

11

.

The

stopping

device

switch

,

if

applicable

,

prevents

electrical

reclosing

of

the

circuit

breaker

after

a

m

anual

trip

until

the

stopping

device

has

been

manually

reset

.

Table

1

-

Operating

Voltage

Range

Undervoitage

Spring

Charging

Si

:

Motor

I

Nominal

Close

Trip

|

Control

Voltagi

|

|

Pick

-

upl

;

Maximum

Coil

Cd

3

f

Drop

-

out

48

Vdc

28

-

56

15

-

29

41

38

-

56

38

-

56

125

Vdc

70

-

140

100

-

140

38

-

75

100

-

140

105

212

75

-

150

140

-

280

250

V

dc

200

-

280

200

-

280

104

-

127

120

Vac

102

104

-

127

36

-

72

104

-

127

74

-

144

240

V

ac

204

208

-

254

208

-

254

208

-

254

Courtesy of NationalSwitchgear.com

aa

Page

10

npv

ASEA

BROWN

BOVERI

Table

2

•

Average

Current

Values

Nominal

Control

Voltage

Spring

Charging

Motor

H

.

E

.

C

.

Fuse

Close

mim

|

Urater

|

Voltage

Lockout

Colli

Coil

Coll

48

Vdc

25.0

0.3

10.7

30

3.14

0.15

125

Vdc

10.0

30

5.0

1.3

0.06

0.2

250

V

dc

30

5.0

2.2

0.65

0.03

0.1

120

Vac

10.0

4.5

30

6.5

0.40

0.5

240

V

ac

2.3

5.0

0.20

0.2

1.15

30

501

502

503

LEGEND

-

Auxiliary

Switch

Contact

Closed

When

Breaker

Is

Closed

.

b

Auxiliary

Switch

Contact

Open

When

Breaker

Is

Closed

.

Latch

Check

Switch

Contact

Closed

When

Breaker

Operating

Mechanism

Is

Reset

.

(

Option

)

LSa

Limit

Switch

Contact

Open

When

Springs

Are

Discharged

.

Closed

When

Springs

Are

Charged

.

LSb

Limit

Switch

Contact

Closed

When

Springs

Are

Discharged

.

Open

When

Springs

Are

Charged

.

Shunt

Trip

Coil

.

Control

Relay

Release

Coil

.

Control

Relay

Lockout

Coil

.

Normally

Open

Control

Relay

Contact

.

Normally

Closed

Control

Relay

Contact

.

-

Terminal

Block

Point

.

Motor

Lead

.

Coil

Lead

End

.

C

1

,

C

2

-

Terminal

Jumper

(

Control

Device

)

.

<

-

Female

Secondary

Disconnect

Contact

.

a

—

C

3

J

2

CII

4

IO

LCb

-

Y

LS

LS

b

uJ

*

a

I

5

I

3

^

C

22

'

i

3

8

IS

b

TC

-

a

zl

b

X

-

9

Y

23

2

52

Ya

Yb

I

6

'

I

O

ML

-

b

2

m

17

CE

n

lo

2

o

m

m

lo

ui

I

?

<

s

>

0

0

o

15

(

MOTOR

18

n

o

n

PI

m

m

r

rO

*

C

4

l

<

/

>

m

5

504

505

506

Figure

8

-

Typical

DC

Schematic

Diagram

Of

Control

Circuit

Courtesy of NationalSwitchgear.com