GE HFA54 Manuale utente

GEI

68720

INSTRUCTIONS

MULTI

CONTACT

AUXILIARY

RELAY

TYPE

HFA

Meter

and

Control

205

Great

Valley

Parkway

Malvern

19355

0715

Courtesy of NationalSwitchgear.com

GEI

68720

CONTENTS

PAGE

DESCRIPTION

APPLICATION

RATINGS

CHARACTERISTICS

BURDENS

RECEIVING

HANDLING

AND

STORAGE

INSTALLATION

PERIODIC

CHECKS

AND

ROUTINE

MAINTENANCE

SERVICING

AND

ADJUSTMENTS

CONTACT

CLEANING

CONTACT

ADJUSTMENT

PICKUP

RENEWAL

PARTS

These

instructions

not

purport

cover

all

details

variations

equipment

nor

provide

for

every

possible

contingency

met

connection

with

installation

operation

maintenance

Should

further

information

desired

should

particular

problems

arise

which

are

not

covered

sufficiently

for

the

purchaser

’

purposes

the

matter

should

referred

the

General

Electric

Company

the

extent

required

the

products

described

herein

meet

applicable

ANSI

IEEE

and

NEMA

standards

;

but

such

assurance

given

with

respect

local

codes

and

ordinances

because

they

vary

greatly

Courtesy of NationalSwitchgear.com

68720

MULTI

CONTACT

AUXILIARY

RELAY

TYPE

HFA

DESCRIPTION

The

HFA

relays

are

instantaneous

hinged

armature

multi

contact

electric

reset

auxiliary

relays

Some

the

models

are

also

available

with

hand

reset

feature

addition

the

electric

reset

feature

They

have

five

six

ectrical

separate

contact

circuits

adaptable

for

either

circuit

opening

circuit

closing

appl

ications

The

HFA

relays

are

available

for

front

back

connection

The

front

connected

relays

are

suitable

for

surface

mounting

only

The

back

connected

relays

are

suitable

for

either

surface

mounting

semi

flush

mounting

Outline

and

panel

drilling

dimensions

are

shown

Figures

Internal

connections

for

the

rel

ays

are

shown

Figures

and

APPLICATION

The

HFA

relays

are

electric

reset

hinged

armature

instantaneous

auxiliary

relays

that

are

suitable

for

application

where

the

operating

characteristics

and

ratings

described

this

book

are

required

RATINGS

The

TYPE

HFA

relays

are

available

with

coil

ratings

for

standard

voltages

575

volts

cycles

and

250

volts

The

operating

coil

continuously

rated

but

the

reset

coil

has

five

(

)

second

intermittent

rating

The

current

carrying

Table

ists

the

The

current

closing

rating

each

contact

amperes

rating

amperes

continuous

amperes

for

one

minute

non

inductive

interrupting

capacity

each

contact

TABLE

AMPERES

VOLTS

115

230

460

575

125

250

Courtesy of NationalSwitchgear.com

GEI

68720

CHARACTERISTICS

The

HFA

relays

are

multi

contact

auxiliary

relays

some

them

available

with

the

additional

feature

both

electric

and

hand

reset

The

hand

reset

feature

accomplished

with

plunger

assembly

installed

through

the

transparent

cover

Some

the

stationary

contacts

(

called

long

wipe

)

are

built

with

special

offset

that

when

circuit

opening

contact

and

circuit

closing

contact

are

used

pair

make

before

break

circuit

results

The

use

these

contacts

requires

additional

strong

contact

spring

minimize

contact

bounce

and

ensure

contact

overlap

These

contacts

are

designated

long

wipe

contacts

Unless

the

relays

are

ordered

with

specific

contact

arrangement

they

will

shipped

with

six

(

)

circuit

closing

contacts

(

code

)

However

the

HFA

and

HFA

relays

are

available

with

contact

code

only

given

Table

The

general

characteristic

HFA

relays

are

summarized

Table

TABLE

Model

Separate

Contact

Circuits

Addi

tiorial

Characteristics

Contact

Arrangement

Tab

HFA

Hand

Reset

III

HFA

Hand

Reset

and

Mechanical

Target

III

HFA

Hand

Reset

with

Over

lapping

Contacts

Positions

and

HFA

III

HFA

Hand

Reset

HFA

Hand

Reset

and

Mechanical

Target

HFA

Hand

Reset

with

Over

lapping

Contacts

Positions

and

HFA

Relay

Contact

Opens

Operating

Coil

when

Relay

Picks

HFA

Similiar

except

with

Additional

Feature

Hand

Reset

Courtesy of NationalSwitchgear.com

GEI

68720

TABLE

III

(

HFA

)

CODE

CONTACT

ARRANGEMEN

POSITION

aaa

Normal

Open

Normally

Closed

Used

Open

Reset

Coil

Circuit

Normally

Open

Long

Wipe

Normally

Closed

Long

Wipe

TABLE

(

HFA

)

CODE

POSITION

CONTACT

ARRANGEMENT

aaa

TABLE

(

HFA

)

CODE

CONTACT

ARRANGEMENT

POSITION

TABLE

HFA

)

CODE

CONTACT

ARRANGEMENT

POSITION

Courtesy of NationalSwitchgear.com

GEI

68720

The

HFA

similar

the

HFA

except

that

has

additional

feature

hand

reset

The

internal

connections

diagram

the

HFA

and

HFA

shows

external

capacitor

connected

parallel

with

the

operating

coil

and

external

resistor

connected

series

with

the

operating

coil

and

external

capacitor

The

purpose

the

external

resistor

limit

the

power

surge

through

the

tank

circuit

the

operating

coil

and

external

capacitor

The

normally

closed

long

wipe

contact

Position

opens

with

delay

after

the

operating

coil

has

been

fully

energized

that

the

external

capacitor

can

fully

charged

before

the

long

wipe

contact

opens

the

circuit

and

the

applied

voltage

cut

off

However

the

charged

external

capacitor

has

sufficient

energy

back

the

operating

coil

ensure

proper

latch

holding

the

armature

See

Figs

and

for

outlines

the

external

capacitor

and

resistor

BURDENS

The

operating

coil

burdens

listed

Table

VII

are

measured

with

the

relay

the

picked

position

rated

voltage

and

are

for

continuous

rating

and

burden

table

VIII

applies

all

HFA

relays

except

HFA

and

HFA

whose

burdens

are

listed

Table

The

common

TABLE

VII

COILS

WATTS

FREQUENCY

CYCLES

VOLT

AMPERES

WATTS

COLD

HOT

7.3

6.0

TABLE

VIII

COILS

RATING

RESISTANCE

FREQUENCY

VOLT

AMPS

250

590

125

160

220

62.5

47.5

180

7.1

2.1

0.49

Burden

ratings

and

the

value

external

resistors

and

capacitors

for

HFA

and

HFA

are

given

Table

Courtesy of NationalSwitchgear.com

GEI

68720

TABLE

EXTERNAL

RESISTOR

OHMS

EXTERNAL

CAPACITOR

RESISTANCE

RESET

COIL

OHMS

RESISTANCE

OPER

COIL

OHMS

OPERATING

COIL

VOLTS

RESET

COIL

VOLTS

125

185

000

125

100

366

250

740

000

200

250

200

230

1650

52.8

230

120

115

185

52.8

1650

250

000

200

115

000

100

125

Resistance

and

capacitance

values

are

nominal

;

variation

RECEIVING

HANDLING

AND

STORAGE

These

relays

when

not

included

part

control

panel

are

shipped

cartons

designed

protect

them

against

damage

relay

examine

for

any

damage

sustained

transit

resulting

from

rough

handling

evident

file

damage

claim

once

with

the

transportation

company

and

promptly

notify

the

nearest

General

Electric

Sales

Offi

Immediately

upon

receipt

injury

damage

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

metallic

chips

Foreign

matter

collected

the

outside

the

case

may

find

its

way

inside

when

the

cover

removed

and

cause

trouble

the

operation

the

relay

INSTALLATION

The

outline

panel

Surface

Type

HFA

relays

should

mounted

vertical

surface

drilling

diagrams

and

internal

connections

are

shown

Figs

mounting

steel

panels

requires

insulating

bushing

for

each

terminal

PERIODIC

CHECKS

AND

ROUTINE

MAINTENANCE

view

the

vital

role

relays

the

operation

power

systems

important

that

periodic

test

program

followed

recognized

that

the

interval

between

periodic

checks

will

vary

depending

upon

environment

type

relay

and

the

user

experience

with

periodic

testing

Until

the

user

has

accumulated

enough

experience

select

the

test

interval

best

suited

his

individual

requirements

suggested

that

the

pickup

voltages

and

condition

contacts

checked

interval

from

one

two

years

See

the

section

SERVICING

AND

ADJUSTMENTS

Indicates

revisi

Courtesy of NationalSwitchgear.com

GEI

68720

SERVICING

AND

ADJUSTMENTS

CONTACT

CLEANING

cleaning

fine

silver

contacts

flexible

burnishing

tool

should

used

This

consists

flexible

strip

metal

with

etched

roughened

surface

resembling

effect

superfine

file

The

polishing

action

delicate

than

scratches

are

left

yet

corroded

material

will

removed

rapidly

and

thoroughly

Fine

silver

contacts

should

not

cleaned

with

knives

files

abrasive

paper

cloth

The

burnishing

tool

described

included

the

standard

XRT

relay

tool

kit

obtainable

from

the

factory

CONTACT

ADJUSTMENT

The

contacts

should

not

require

readjustment

since

they

are

self

aligning

Any

contact

circuit

can

changed

(

except

noted

the

CHARACTERISTIC

section

)

from

circuit

opening

circuit

closing

vice

versa

removing

the

fixed

contact

turning

over

and

returning

its

place

for

any

reason

becomes

necessary

readjust

the

contacts

for

instance

contact

changed

from

circuit

opening

circuit

closing

the

following

checks

and

adjustments

should

made

Make

sure

that

all

contact

and

coil

studs

are

tight

Make

sure

that

the

armature

free

binding

when

operated

hand

braided

pigtail

lead

all

contacts

must

adjusted

exert

minimum

force

the

contacts

The

Make

mechanical

contact

adjustments

follows

3.1

Normally

Open

Contacts

Wipe

and

Gap

(

Normally

open

contacts

must

adjusted

before

normally

closed

contacts

)

The

moving

contact

arms

must

adjusted

that

the

normal

open

contacts

make

approximately

simultaneously

(

008

)

when

the

relay

operated

hand

All

normally

open

contacts

must

have

wipe

inches

The

contact

gap

must

approximately

inch

This

can

adjusted

follows

)

Insert

0.058

gage

between

the

armature

and

pole

face

and

the

armature

)

Bend

the

left

hand

moving

contact

just

light

the

continuity

lamp

iii

)

Remove

the

0.058

gage

and

bend

the

remaining

moving

contacts

that

all

moving

contacts

make

approximately

the

same

time

Courtesy of NationalSwitchgear.com

GEI

68720

)

check

performance

turn

the

stop

screw

until

one

contact

continuity

lamp

lit

Turn

stop

screw

additional

turn

and

all

continuity

lamps

should

lit

Back

off

the

stop

screw

obtain

least

inch

contact

gap

)

Insert

inch

gage

between

any

the

normally

open

moving

and

stationary

contacts

and

turn

the

stop

screw

clockwise

until

the

continuity

lamp

lights

Lock

the

stop

screw

this

position

with

the

locking

nut

3.2

Normal

Closed

Contact

Gap

and

Wipe

The

moving

contact

arms

must

adjusted

that

the

normally

closed

contacts

make

approximately

simultaneously

(

008

)

when

the

relay

operated

hand

The

wipe

and

gap

are

automatically

set

the

formation

the

stationary

contacts

and

the

strength

the

control

spring

Adjustments

can

made

follows

)

Turn

the

stop

screw

clockwise

until

the

first

normal

osed

contact

opens

)

Turn

the

stop

screw

additional

turn

clockwise

All

normally

closed

contacts

should

open

iii

)

Turn

stop

screw

counterclockwise

until

there

approximately

gap

between

the

stop

screw

and

armature

Lock

the

stop

screw

this

position

PICKUP

The

main

coil

should

adjusted

pick

rated

voltage

for

relays

and

rated

voltage

for

relays

This

adjustment

may

obtained

unseating

the

knurled

adjusting

nut

the

lower

end

the

armature

and

turning

this

nut

clockwise

direction

raise

the

pickup

The

pickup

decreased

turning

the

nut

the

counterclockwise

direction

The

reset

coil

should

pick

rated

voltage

and

rated

voltage

There

adjustment

available

alter

this

pickup

Since

the

reset

coil

rated

intermittently

care

should

exercised

when

applying

this

voltage

After

all

adjustments

are

completed

the

mounted

relay

should

operated

few

times

certain

that

the

mechanism

operates

freely

and

that

the

contact

surfaces

align

properly

Check

see

that

the

armature

latches

when

operated

hand

and

opens

readily

when

reset

RENEWAL

PARTS

When

ordering

renewal

parts

address

the

nearest

Sales

Office

the

General

Electric

Company

specify

quantity

required

name

the

part

wanted

and

the

complete

nameplate

data

The

renewable

parts

publication

GEF

2757

Courtesy of NationalSwitchgear.com

GEI

68720

•

;

FIG

(

8025534

)

HFA

RELAY

BACK

CONNECTED

SURFACE

MOUNTED

(

FRONT

VIEW

)

Courtesy of NationalSwitchgear.com

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