GE PJV Series Manuale utente

INSTRUCTIONS

INSTANTANEOUS

D.C.

TYPE

PJV

GEK—

36767

MODEL

12PJV11BK(-)E

GENERAL

ELECTRIC

UNDERVOLTAGE

RELAY

GEK-36767

CONTENTS

PAGE

DESCRIPTION

APPLICATION

RATINGS

AND

BURDENS

CONTACT

RATINGS

TABLE

COIL

CIRCUIT

RATINGS

AND

BURDENS

TABLE

CHARACTERISTICS

OPERATING

PRINCIPLES

PICKUP

AND

DROPOUT

DEFINITIONS

RELAY

CALIBRATION

PICKUP

VOLTAGE

TABLE

DROPOUT

TIME

CONSTRUCTION

PLUNGER

UNIT

OUTLINE

DIAGRAM

AND

INTERNAL

CONNECTIONS

DIAGRAM

CASE

RECEIVING,

HANDLING

AND

STORAGE

ACCEPTANCE

TESTS

VISUAL

INSPECTION

MECHANICAL

INSPECTION

ELECTRICAL

TESTS

INSTALLATION

PROCEDURE

LOCATION

MOUNTING

CONNECTIONS

ADJUSTMENTS

PERIODIC

CHECKS

AND

ROUTINE

MAINTENANCE

MECHANICAL

CHECKS

ELECTRICAL

CHECKS

SERVICING

RENEWAL

PARTS

GEK-

36767

DESCRIPTION

The

PJV11BK

relay

operated

single

unit

instantaneous

undervoltage

device.

intended

for

application

D.C.

systems to

detect short

circuits

that

reduce the system

voltage

below

the

drop

out

setting

the

relay.

The

PJV11BK

relay

comes

SI-E

non-drawout

case.

However,

the

standard

plug

available

which

permits

disconnection

the

contact

circuits

from

the

front

the

relay.

The

outline

and

mounting

dimensions

for

the

relay

are

given

Figure

The

outline

for

the

external

resistor

that

required

and

furnished

with

the

relay

given

Figure

The

internal

connection

diagram

shown

Figure

APPLICATION

The

PJV11BK

relay

designed

provide

high

speed

undervoltage

detection

D.C.

systems.

The

coil

circuit

this

relay

should

connected

the

portion

the

D.C.

system

being monitored

without

regard

polarity.

The

contacts

should

used

initiate

the

desired action

low

voltage.

When

applying

this relay,

Table

should

consulted

insure

that

the

relay

will

pick-up

for

normal

system

voltage

when

set

drop

out

the

desired

value.

RATINGS

AND

BURDENS

CONTACT

RATINGS

The

contacts

are

rated

amperes

for

continuous

duty

and

amperes

for

tripping

duty.

The

interrupting

ratings

are

given

Table

TABLE

INTERRUPTING

RATINGS

AMPS

VOLTS

TNDUCTIVE

NON-INDUCTIVE

115

230

460

0.5

AMPS

VOLTS

INDUCTIVE

NON-INDUCTIVE

1.0

0.5

125

0.3

250

0.15

0.3

COIL

CIRCUIT

RATINGS

AND

BURDENS

These

relays

are

supplied

with

external

resistor

which

wired

series

with

the

operating

cuil.

Ratings

and

burdens given

for

this

relay

are

for

the

operating coil

wired

series

with

the

external

resistor.

Table

gives

the

continuous

voltage

rating,

calibrating

range,

burden,

external

resistor

resistance,

and

operating

coil

resistance

for

these

relays.

These

nsttuCtiOfls

nOt

purport

cover

all

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every

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further

information

dosirod

should

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p’binru

rise

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fi:c’ntli

for

the

purchaser’s

purposes,

the

putt

tier

should

referred

tic

thiS’S,

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Comj’accy

the

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aequu

ted

the

products

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given

respect

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GEK-36767

TABLE

RATING

CAL.

RANGE

BURDEN

WATTS

COIL

EXTERNAL

VOLTS

DROPOUT VOLTS

RATED

VOLTS

OHMS

RESISTOR

OHMS

700

280

580

345

7000

CHARACTERISTICS

OPERATING

PRINCIPLES

These

plunger

relays

operate

the

principle

electromagnetic

attraction.

The

contacts

are

opened

closed

armature

which

drawn

vertically

into

solenoid.

external

resistor

is included

part

these

relays

connected

series

with the

operating

coil.

This

external

resistor

has

resistance

that

much

higher

than

that

the

operating

coil.

This

type

circuit

prevents

self

heating

and

variations

ambient

temperature

from

having

appreciable

effect

relay operating voltage.

The

high

resistor

value

makes

changes

operating

coil

resistance

with

temperature

insignificant

terms

the

total

circuit

resistance.

PICKUP

AND

DROPOUT

DEFINITIONS

Pickup

voltage

defined

the

voltage

which

the normally

open

contacts

will

when

gadually

increasing

voltage

applied

to the

relay.

Dropout

voltage

the

voltage

which

the

normally

closed

contacts

will

when

the

applied voltage

gradually

decreased

from

some

level

voltage

above

pickup

voltage.

Reset

voltage

the

voltage

which

the

relay

will

assume

its

de—energized

position.

normally

open

contact

defined

contact

which

open

when

the

relay is

completely

de—energized.

RELAY

CALIBRATION

These

relays

are

calibrated

the

factory

for

dropout

volts.

Table

shows

the

calibrating

ranges

for

the

various

operating

coil

—

external

resistor

combinations

used

these

relays.

Dropout

set

adjusting

the

vertical

position

of’

the

armature

the plunger

rod.

The

four

factory

dropout

voltage

calibrations

appear

the

top

the

nameplate

and

correspond

to the

scrihed

marks

the

calibrating

tube.

set

the

relay

to dropout

one

the

factory

calibrated

voltages,

the

adjustable

armature

should

set

that

its

bottom

edge

just

lines

with

the

corresponding

scribed

marking

with

the

relay

plunger

its

de-energized

position.

The

scribed

mark

highest

the

calibrating

tube

(closest

the

coil)

corresponds

to the

lowest dropout

voltage

calibration

listed

the

nameplate

and

on.

The

factory

dropout

calibrations

are

the

voltage

percent

which

the

relay

will

dropout

when

the

applied voltage

gradually

reduced.

When

these

relays

are

properly

adjusted,

they

will

dropout

one

smooth

motion

the

reset position.

That

is,

with

applied

voltage gradually

reduced,

the

relay

will

reset

within

two

percent

of the

voltage

which

the

normally

open

contacts

open.

PICKUP

VOLTAGE

Dropout

voltage

and

pickup

voltage

are

not

independently

adjustable.

The

relays will

pickup

percentage

of dropout

voltage

that

function

of the

dropout

voltage

setting.

For

D.C.

operated

relays

wEth

two

normally

open

one

normally

open

and one

normally

closed

contact,

pickup

will

occur

some

voltage

which

less

than

145

percent

set

dropout

voltage.

Tnis

percentage

will

cecrease

the

dropout

voltage

setting

is increased

shown

table

GEK-36767

TABLE

PICKUP

VOLTAGE

AS A

FUNCTION

DROPOUT VOLTAGE

SETTING

FOR

RELAYS

WITH

N.O.

M.D.

AND

N.C.

CONTACT

VOLTAGE

DROPOUT

VOLTAGE

PICKUP

VOLTAGE

PICKUP

VOLTAGE

RATING

CALIBRATION

POINTS

CALIBRATION

POINT

CALIBRATION

MAXIMUM

POINT

TYPICAL

280

415 350

380

530

450

700

480 620

540

580

680 650

For

relays

with

two

normally

closed

contacts,

pickup

will

approximately

160

percent

set

dropout

voltage.

DROPOUT

TIME

Figure

shows

typical

dropout

time

characteristic

curve

for

these

relays.

Figure

shows

typical

pickup

time

curve.

CONSTRUCTION

PLUNGER

UNIT

All

of the

PJV

relays

are

the

same

plunger

type

construction.

(Refer

Fig.

6).

The

adjustable

armature

mounted

the

threaded

portion

plunger

rod

which

carries

the

moving

contacts

upward

the armature

operated.

The

armature

drawn

upward

into

the

coil

the

flux

created

the

rectangular

magnet

frame

and

cylindrical

pole

piece

inside

the

coil.

Guides

for

the

plunger

rod

are

provided

the

top

hole

the

pole

piece,

and

the

bottom

the

fit

the

molded

contact

carrier

inside

the

calibration

tube.

Openings

the

sides

the

calibration

tube

allow

access

the

armature

adjust

pickup.

The

normally

closed

fixed

contacts

are

similar

the

normally

open

fixed

contacts

except

they

are

mounted below

the

moving

contact

instead

above

it,

and

the

backstop

arm

omitted.

OUTLINE

DIAGRAM

AND

INTERNAL CONNECTIONS

OIAGRAM

Figure

this instruction

book

shows

the

internal

connections

diagram

for

the

PJVI1BK

relay.

Figure

shows

the

outline

and

panel

drilling

diagram.

Figure

shows

the

outline

the

external

resistor.

CASE

The

case

for

the

PJV11BK

relay

has

two

special

high

voltage

studs

which

connect

directly

the

operating

coil.

These

insulated

studs

pass

directly

through

the

rear

the

case.

The

relay

cannot

drawn

out

its

case

without

removing

the connections

and

dis—assembling

these

high

voltage

studs.

The

contact

circuits

the

relay

are

brought

out

through

the

standard

case

studs

labeled

one

through

ten

the

internal

connections

and

the

outline

diagram.

Tne

electrical

connections

between

the

case

studs

and

the

cradle

mounted

relay

unit

are

made

thrcug

spring

backed

contact

fingers

mounted in

stationary

molded

inner

and

outer

blocks

betwrcn

which

nests

removable

connecting

plug

which

completes

the

circuits.

The

contact

circuits

are

disconnected

when

his

plug

removed,

but

the

operating

coil

not

disconnected

removing

this

plug.

Figure

shows

the

high

voltage

stud

assembly

which

connects

the

ooerating

col.

This

assemb1

consists

two

threaded studs

which

are

mounted

compound

plate

attached

tne

cradle.

Each

threaded

stud

surrcunded

two

insulating

brushings,

one

inside

the

case

and

one

outside

the

case.

The

bushinq

that

fits

through

froii

outside

the

case

passes

entirely

througn the

inside

diameter

trio

bushing

that

inside

the

case.

The

diameter

the

portion

the

hushing

that

outside

the

case

su’i that

trio

cradle

cannot

drawn

out

without

first

disconnecting

the

leads

the

high

voltage

studs

and

tnen

pulling

the

insulating

bushings

off

the

studs.

GEK—JbJbi

The

relay

mechanism

mounted

steel

framework

called

the

cradle

and

complete

cnit.

This

cradle

held

firmly

the

case

with

latch at

the

top

and

the

bottom

and

guide

pinat

the

back

the

case.

The

cases

and

cradles

are

constructed

that

the

relay

cannot

inserted

the

case

upside

down.

The

connecting

plug,

besides

making

the

electrical

connections

between

the

respective

blocks

of the

cradle

and

case,

also

locks

the

latch

place.

The

cover,

which

fastened

the case

thumbscrews,

holds

the

connecting

plug

place.

draw

out

the

relay

unit

the

cover

first

removed,

and

the

connecting

plug

drawn

out.

The

external

connections

to the

high

voltage

studs

are

then

disconnected

and

the

insulating

bushings are

then

pulled

off

the

rear

the

studs.

The

relay

unit

can

then

easily

drawn

out

after

the

latches

have

been

released.

replace

the

relay

unit,

the

reverse order

followed

making

certain that

the

insulating

bushings

have

been

replaced

the

high

voltage

studs.

These

bushings

not

allow

the

removal

the

relay

unit

with

the

external

connections

intact.

The

case

suitable

for

either

surface

semi-flush

panel

mounting

and

assortment

hardware

provided

for

either

mounting.

The

cover

attaches

the

case.

Each

cover

screw

has

provision

for

sealing

wire.

RECEIV1NG

HANDLING

AND

STORAGE

These

relays,

when

not

included

part

control

panel, will

shipped

cartons

designed

protect

them

against

damage.

tmmediately

upon

receipt

relay,

examine

for

any

damage

substained

transit.

injury

damage

resulting

from

rough

handling is

evident,

file

damage

claim

once

with

the

transportation

company

and

promptly

notify

the

nearest

General

Electric

Apparatus

Sales

Office.

Reasonable

care

should

exercised

unpacking

the

relay

order

that

none

the

parts

are

injured

the

adjustments

disturbed.

the

relays

are

not

installed

immediately,

they should

stored

their

original

cartons

place

that

free

from

moisture,

dust

and

met3llic

chins.

Foreign

matter

collected

the

outside

the

case

may

find

its

way

inside

when

the

cover

removed

and

cause

trouble

the

operation

the

relay.

ACCEPTANCE

TESTS

Immediately

upon

receipt

relay

inspection

and

acceptance

test

should

made

insure

that

damage

has

been

sustained

shipment

and

that

the

relay

calibrations

have

not

been

disturbed.

VISUAL

INSPECTION

Check

that

the

nameplate

stamping

insure

that

the

moael

number,

rating

and

calibration

range

the

relay

received

agree

with

the

requisition.

Examine

the

relay

visual inspection

that

there

are

broken

cracked

molded

parts

other

signs

physical

damage,

and

that

all

screws

are

tight.

Also

check

see

that

the

flexible

moving

con

tact

leads

extend

striaght

back

from

the

contacts

and

have

not

been

deformed.

MECHANICAL

INSPECTION

recommended

that

the

following

mechanical

adjustments

chccked:

Operate

the

plunger

each

unit

hand and

allow

reset

insure

that

the

unit

free

from

friction

binds.

two

nomally

open

contacts

are

i:resent,

observe

that

with

one

contact

just

making

there

less

than

1/64

inch

gap

the

other

contact.

wipe

normally

open

closed

contact

should

approximately

3/64

mci.

The

normally

open

contact

gap

with

the

armature

fully reset

should

approximately

3/32 inch

for

either

contact

arrangement.

Backstops

should

present

above

all

normally

open

contacts

only.

The

gap

between

the backstop

and

contact

brush

the

tip

should

approximately

1/16

with

the

armature

reset.

GEK-36

767

ELECTRICAL

TESTS

DROPOUT

AND

PICKUP

The

units

are

normally

supplied

from

the

factory

with

the

bottom

the armature

aligned

with

the top

mark

the

calibration

tube.

This

corresponds

the

minimum

dropout

calibration

point

given

the

nameplate.

should

sufficient

check

dropout

and

pickup

each

unit

this

setting.

test

the

relay

for

proper

operation,

preferable

connect

the

relay

series

with

the

external

resistor

variable

D.C.

supply.

contact

indicating

light

ohmmeter

conncted

normally

open

contact

will

indicate

pick-up.

Similarly,

indication

normally-closed

contact

indicates

drop-out

when

the

voltage

lowered

from

the

picked-up

condition.

Reset

must

checked

visually.

simply

check

for

operation

but

not

for

calibration,

D.C.

supply

not over

volts

can

connected

directly

the

relay

without

the

resistor.

Check

for

smooth

operation

plunger

when

operating

the

relay.

INSTALLATION

PROCEDURE

LOCATION

The

location

should

clean

and

dry,

free

from

dust

and

excessive

vibration,

and

well

lighted

facilitate

inspection

and

testing.

MOUNT

The

relay

should

mounted

vertical

surface.

The

outline

end

panel diagram

shown

Figure

The

outline

diagram

for

the

external

resistor

s,own

Figure

CONNECTIONS

Internal

connection

diagram

shown

Figure

One

the

mounting

studs

screws

should

permanently

grounded

conductor

not

less

than

No.

B&S

gage

‘opper

wire

its

equivalent.

ADJ

(JSTMENTS

The

plunger

unit

should

manually

operated

make

sure

that

th.

assembly

working

smoothly

and

not

binding.

desirable

that

the

final

setting

the

required

dropout

voltage

performed

with

the

relay

its

case

and

mounted

its

permanent

location

iid

with

the

relay

wired

the

external

resistor

with

which

will

used.

The

required

dropout

voltage

may

set

follows.

With

the

relay

de-energized

turn

the

bottom

the

knurled armature

the

approximate

position

the tube

corresponding

the

desired

dropout

setting.

With

variable

source

D.C.

voltage

apply

sufficient

voltage

the

relay

pick

up.

Gradually

decrease

the

applied voltage

and

note

the

voltag2

which

the

rlay

L,35

out.

dropout

too

low,

turn

the

armature

ride

lower

th.

:‘librating

tube,

dropout

too

high,

turn

the

armature

ride

lower.

Once

dropout

voltage

set,

check

pickup

voltage

gradually

increasing

the

applied voltage

with

the

unit

dropped

out.

Pickup

votage

should

described

the

oacteristics

section.

PERIODIC

CHECKS

AND

ROUTINE

MAINTENANCE

view

of the

vital

role

protective

relays

the

ope

a.cn

power

sy;te,

important

that

periodic

test

program

followed.

Unless

otherwise

dictatoi

unusual

environeental

conditions,

recommended

that

the

following

points

cheked

interval

from

one

two

years.

MECHANICAL

CHECKS

Manually

operate

the

voltage

unit

armature

and

allow

reset

make

sure

that

excessive

friction

tendency

bind.

GEK—36767

Check

see

that

the

contacts

have

approximately

3/64

inch

wipe

and

that

the

normally

open

contacr.

gap

approximately

3/32 inch

with

the

armature

reset.

Check

see

that

the

back

Stops

the

normally

open

contact

approximately

1/16

inch

above

the

stationary

contact

tips.

Examine

the

contact

surfaces

for

signs

tarnishing

corrosion.

Silver

contacts

should

cleaned

with

burnishing

tool,

which

consists

flexible

strip

metal,

with

etched,

roughened

surface.

Burnishing

tools

designed

especially

for

cleaning

relay contacts

can

obtained

from

the

factory.

not

use

knives,

files

abrasive

paper or

cloth

any

kind

clean

relay

contacts.

ELECTRICAL

CHECKS

Check

the

dropout

and

pickup

voltage

the

relay

described

the

installation

section.

not

recormiended

that

the

relay

readjusted

when

minor

setting

variations

from

the

that

are

noted,

long

the

relay

still

within

limits.

Such

deviation

can

introduced

differences

test

equipment

human

error.

SERVICING

Friction

there

any

tendency

bind

excessive

friction

present,

check

see

that

the

armature

does

not

have

tendency

rotate

and

bind

the

relay

operates.

does,

the

flexible

leads

the

moving

contacts

are

not

formed

properly.

Also

check

that

foreign matter

present

between

the

armature

and

calibrating

tube.

Moving

Contact

Leads

The

flexible

moving

contact

leads

should

formed

keep

the

moving

assembly

centrally

located.

these

moving

contact

leads

have

been

deformed,

they should

reshaped

follows:

The

lead

should

have

right

angle

bend

when

leaves

the

tail

the

moving

contact

button,

this

bend

should

vertical

with

the lead

going

down

for

normally

open

contact

and

for

normal]”

closed

contact.

The

lead

should

then

flow

smooth

arc

to the

terminal

screw

the

molded

base.

The

whole

lead

should

lie

vertical

plane

and

not

blow

out

horizontally.

Binding

will

stop

when

the

leads

are

formed

correctly

providing

the

relay

not

binding

due

foreign matter

bent

moving

parts.

See

the

acceptance

tests

and

installation

sections

for

contact

gap and

wipe

adjustments.

Gaps

and

wipes

are

adjusted

forming

bending

the

stationary

contacts.

Fixed

Contact

Initial

Tension

The

stationary

contact

normally

rests

member

called

the

contact

stop

arm.

Initial

tension

the

face

applied

to the

contact

tip

which

necessary

part

the

contact

from

its

stop

arm.

This

face

may

measured

with

gram

gauge.

contacts

are replaced

readjusted

for

wipe

gap,

initial

tension

should

checked.

When

only

one

normally

closed

contact

is used,

the

initial

tension

this

contact

should

about

grams.

this

arrangement the

normally

open

contact

should

have

about

five

grams

initial

tension.

For

all

cther

contact

codes,

all

contacts

should

have

about

five

grams

initial

tension.

RENEWAL

PARTS

recomended

that

sufficient

quantities

renewal

parts

carried

stock

enable

the

prompt

replacement

any

that

are

worn, broken

damaged.

When

ordering

renewal

parts,

address the

nearest

Sales

Office

the

General

Electric

Company,

specify

quantity required,

name

part

wanted,

and

give

complete

nameplate

data,

including

serial

number.

possible,

give

the

General

Electric

Company

requisition

number

which

the

relay

was

furnished.

GFK—35757

FIG.

(Photo

Not

Available)

Type

PJV1IBK(-)E

Relay

Out

Case-Front

View

GEK—36767

COCE

NI’MPFP

LLL

TTT

‘\1

-----EZTh---

EXTEP’AL

RESI

STOP

S!OPT

FI3C-EPS

MA(E

DOTtED

CC*’NFCTIOt1S

/‘

!HORTING

FARS

ARE

PEUIRED

NOTE:

141G[1

VftTAGE

SThDS

(2!

22)

PROJECT

THROUGH

REAP

CASE.

LEADS

A’D

ftSHINGS

VST

RFHOVED

FRO!A

ThESE

SIUDS

REFORE

CRADLE

Cfl

W:THDPM.

FIG.

(0245A3667—1)

Internal

Connections

Diagram

For

Model

PJV11BK(—

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