GE 12IAC8OL, 12IAC8OL-A Instructions Manual

for

This

relay

INSTRUCTIONS

supplement

model

12IAC8OL(-)A.

TIME

in

conjunction

OVERCURRENT

TYPE

MODEL

TAC

12IAC8OL(-)A

INTRODUCTION

with

RELAY

GEH—1788

forms

Insert

the

Booklet-

instructions

GEH-1788

unit relay

in

GEH-1788

Relay

with

is

1)

2)

The

model

a

seal—in

similar

The

internal

supplement.

The

induction provide 3

and

4)

ment

in

is

completed,

the

unit

is

open,

tap

value.

time

current

for

model

12IAC8OL(-)A

unit

model

mounted

121AC53A(-)A

to

connections

unit

torque

must

flux

control.

be

to

completed

rotate

torque

will

operate

the

unit

will

curves, 121AC53A(-)A.

DESCRIPTION

consists

in

are

uses

wound

This

the

can

be

on

overcurrent.

not

burdens

of

a

small

described

as

shading

control

in

order

disk.

developed

operate

and

a

single single

shown

that

When

at

ratings

in

figure

coils circuit

there

the

on

the

When

current

of

IAC

type

ended

GEK-1788

1

on

the

(connected

be

shading

induction

the

shading

levels

this

relay

time

(Si)

except:

of

U-magnet

a

phase

coil

case.

this

up

circuit

disk

coil to

are

overcurrent

This

to

studs

displace

and

circuit

20

times

as

given

Those

nor

to

operation probls matter

Instructions

provide

or

arise

should

do

every

are

not possible

Should

not

to

SYSTEMS

for

.aintenanc..

which

referred

be

POWER

GENERAL•

purport

covered the

General

to

cover contingency further

•ufficiently

MANAGEMENT

all to

information

Liectric

detafle

be

for

Company.

or

met

be the

variation.

in

connection

desired

purchaser’s

DEPARTMENT

or

should

ELECTRIC

in

with

puro.ea,

equip..nt inatal3atioq,

particular

the

GEK-

27870

SEAL—IN

CONTROL

WINDINGS

8-70

FIG.

1

GENERAL

=

*

(0226A7211-0)

ELECTRIC

SHORT

INTERNAL

CO..

POWER

1

2

FINGERS

COKNECTIONS

SYSTEMS

3

DIAGRAM

MANAGEMENT

FOR

BUSINESS

4

THE

IACBOL(-)A

DEPT.,

C)

6

RELAY

MALVERN,

(FRONT

PA.

19355

VIEW)

INSTRUCTIONS

TIME

OVERCURRENT

RELAYS

GEH-1

788L

IAC53A IAC53B IAC53C

TYPES

IA

C5

3

IAC54A

IAC54B

R

GENERAL

ELECTRIC

GEH-1788

Tvne

Time

IAC

TOP TAP SEAL-IN

UNIT HOLDING (0I

SEAL-

TARGET

SEAL-IN UNIT STATIONARY CONTACT,

S[AL UNIT STATIONARY CO RIGHT

SEAL MOVING

CON

AC

PIVOT PLUG

L

IN

FT

N

TA

(.T

N

IN

TACT

3EMBLY

Overcurrent

--

Relay

(ii

‘4

BLOCK

TAP

DIAL

--TIMF SHAFT

DISK MAIN

MOVING CONTACT

M

A

N

IDNARY

STA’

AND

ROUGH CONTACT

ASS

Si,p,

—

-‘p

MAGNET 0151<

Y

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C

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c’1

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I

DISK AND SHAFT

JEWEL

The

SCREW

Induction

—

Unit

for

Type

IAC

Relays

(Front

View)

c..J

c..1

Di

LL

cS-i

LC)

C’,

0

>

0

C-,

View)

Fin.

for

Induction

The

2

Unit

Type

IAC

Relays

(Rear

2

TIME

OVERCURRENT

RELAYS

IAC53A(-)A IAC53B(-)A IAC53C(-)A

iAC53R(-)A IAC54A(-)A 1AC54B(-)A

The overcurrent acteristic. overcurrent The

various differ

in

the instantaneous included.

These

induction

T

Types

on relays number

relays

unit

ype

1AC53 relays They

single-phase

unit

with

are

employed

described

of

circuits

and/or

consist

instantaneous

an

Contact

Circuits

One One One

One Two Two

and

1AC54

very-inverse

a

and

an

of

to

poly-phase

in

this

they

a-c

an

induction

TYPE

INTRODUCTION

Instan.

Unit

No Yes No Yes No Yes

relays

time

protect

instruction

close,

tripping

unit

which

are

against

circuits. and

unit

time

char

book if

or

per-

A-C

an

is

an

IAC

Trip

Unit

No

Yes Yes No No

mits

instantaneous rents, use

where preferred. composed is,

the

a-c

tripping

ed

separately

indicates

the

internal

diagrams.

Induc.

One One On One One One

or

an

d-c

of

induction

the

Unit

tripping

induction

power

Since

practically

various

unit,

unit),

they

in

the

units

comprising

connections

Outline

D.

&P.

Fig.

20

Fig.

20

Fin.

20

Fig.

20

Fig.

20

‘Fig.

20

for

unitwithana-c

is

unavailable

combinations

the

instantaneous

are,

for

following

and

outline

Conn.

Fig. Fig. Fig.

exteremely

tripping

or

all

Type

of

convenience, text.

each

The

type andpanel

mt.

a-c IAC

the

and

12 13 14

15 16 17

high

tripping

relays

above

unit

describ

above

also

cur

unit

(that

and

table

lists

drilling

for

is

are

the

TAC mounted tion-disk current disk the

alarm

ary

by

a current magnet delay.

the

left and such unit

picks up

and

button

a

n’Jer

rurt;2-O-

the

pur.:lianer

but

no

The

relays.

shaft

contact

spiral

acting

There

of

its

contacts

that

picks

up,

remains

Shove

posszble

information

To

Civ

such

INTRODUCTION

induction

Figs.

in

the

construction

operating

carries

or

trip

or

spring

and

its

is

a

the

shaft.

when

up

and

it

raises

beneath

instructions

contingency

‘s

Cxtent

ssura.nce

unit

cradle.

coil the circuit

contacts.

to

motion

on

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seal-in

in

parallel

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main

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1

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disk

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show

units

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contact

when

The

the

is

it

disk

proper

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to

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mounted

unit

has

with

the

contacts-close

in.

When

into

left

the

released

corner

purport

be

or

matter

products

with

view

met

should

until

not

to

the

INDUCTION

unit

in

all

the

induction

are

of

U-magnet.

which

the

is contact-closing by

a

the

correct

on

the

its

coil

main

the

seal-in

which

by

of

to

in

connect

particular

should

described

respect

Type

the

induc

completes

station

restrained

permanent

time

front

in

series

contacts

seal-in

unit

latches

pressing

the

cover.

cover

al.!

ion

be

referred

to

local

unit

The

a

to

details

with

problems

herein

codes

UNIT

The

IAC

relays, characteristics tripping cause

closing

to time the rent

four bination amperes;

0.5,

0.12,

installation,

to

meet

the

it

to

OPERATING

The

induction

contacts

the

pick-up

delay

setting

characteristics

The

induction

operating

of

0.6,

0.16,

or

variations

arise

the

General applicable

and

ordinances

APPLICATION

induction

supplying

of

breakers

close

its

which

value

in

closing

of

the

time

coils,

taps

1.5,2.0,

0.8,

0.2,

which

as

2.5,

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in

operation

are

Electric

ANSI,

because

unit

is

the

main

unit

inverse

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currents

the

relay

for

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and

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contacts.

CHARACTERISTICS

unit

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RATINGS

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Company.

IEEE

designed

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rrintenance.

covered

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they

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4,5,6,7,8,10,12,

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to

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NEMA

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in

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alarm

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increases

block.

determined

The

time-cur

3.

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Figure

3

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Time-Current

Very-Inverse-Time

Curves

for

Characteristics

Type

IAC

Relays

with

4

1•C’4

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cc

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CALIBRATION PLATE

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A

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TRIPPING

UNIT

Relay

GEH-1788

Fig.

The

30

amperes

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current-carrying

selection

as

indicated

Function

Tripping Carry Operating Resistance Impedance

If

aaxiliary

such

that

the

contacts

protective

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current-closing

for

of

the

in

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at

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tripping

relay

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the

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voltages

tap

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0.1-0.4

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table.

three

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60 50 25 60

50 25 60 50 25

60 5tJ

UNIT

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for

coils

up

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BURDENS

the

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based

burdens

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to

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1.5

0.5

0.1

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standard

are

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times

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with

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coils

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setting,

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side

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the

contacts

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series

INTRODUCTION

instantaneous

unit

which

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are

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with

induction

the

normally

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main

unit

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unit.

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the

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right

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the

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the

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GEH-1788

26

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Time

Overcurrent

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APPLICATION

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current

the

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the

transformer

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unit

*

Indicates

INTRODUCTION

unit

tripping

energize

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main

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(see

in

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revision

circuit-breaker

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into

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coilwhen

mounted

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isaType

the

operating

The

transformer

Type

the

secondary

the

coil

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the on

operation

The

secondary

A-C

REA

TAC

and

breaker

the

coil

TRIPPING

unit

relay

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coil

the

upon

relay.

of

the

removes

trips.

the

of

rear

of

the

this

current

in

unit

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circulates the

main returning rent

transformer.

by

ated upper armature

the

of

REA

Type

this

in

tribution

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Type contacts

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the

UNIT

through

coil

through

the

limb

firmly

induction

unit

coil

flux

of

contacts.

causes

coil

the

of

main

the

of

against

unit

is

by

transformer

which

the

which

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the

Type

REA

Type

the

Normally,

REA

Type

magnetic

this

close,

short-circuited

actuates

opening

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secondary

the

trips

unit

auxiliary

contacts

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coil

structure limb. the

action,

the

current

breaker.

current

the

of

passes

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shorting

and

causing

armature

of

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to

flux

through

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current

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to

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the

holds

contacts

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a

Type

through

unit, cur

gener

of

flows

redis

and

REA

and

the the

the

Type

IAC

Time

Overcurrent

Relay

GEH-1788

Figure

Three Phase

8

Type

and

(K-6315667

IAC53A

Ground

3

[2])

Relays

Overcurrent

3-Phase

External

Used

Circuit

Connections

for

Phase-to-

Protection

of

Device External

50

J

51 51N 52

SI

TC

A

Function

Diagrams

Instantaneous Overcurrent Ground Power Seal-in Trip

Overcurrent

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connections

pickup

operating

times

should

contacts,

an

be

±7%.

for

cracks

of

a

fine

the

it

should

provided

a

consists

roughened

file.

needle.

disk

flexible

of The

are

rapidly

until

which

set

screw

This

etched

superfine

no removed

scratches

ACCEPTANCE

dial

its

contacts

dial

current,

time

pickup

be

position

of the

With

should

0.72

of

Figure

within

Figure

2

times

current

seconds

and

relay

be

by

is

be

a

and

thoroughly.

the

cleaning

Fine

knives,

files

deterioration may material

standard

checked

may

The

It

files,

leave

is

at

TESTS

B.

INSTANTANEOUS

Pickup

With pickup should

pickup

after

C. Pickup

tap Dropout

should

of

each

TARGET

The

value

Open

tap

value;

at

be

checks.

unit

remain

of

the silver leave

in

burnishing

relay

or

of

minute

the

tool

contacts

abrasive

scratches

the

contacts

PERIODIC

recommended

least

once

gradually

of

±10%

no

more

SEAL

should

the

picked

the

Be

main

unit

test.

with

the

The

actual

contacts.

particles

tool

kit

applied

the

than

sure

IN

pickup

main

unit should

flexibility

described

obtainable

that

every

UNIT

minimum

UNIT

unit

contacts,

up.

points

should

paper

which

Abrasive

of

and

thus

TESTING

pickup

six

months.

current

variation

±5%

the

target

between

contacts

Reduce

drop

of

the

of

contact.

not

be

or

cloth.

increase

paper

insulating

prevent

is

included

from

of

the

calibration.

has

75

closed.

the

current

out.

tool

cleaned

Knives

arcing

abrasive

the

au

unit

on

repeated

been

and

seal

insures

or

cloth

closing.

in

factory.

units

should

There

reset

100%

in

to

with

or

and

the

be

of

unit 25%

renewal

prompt

or

damaged.

It

is

replacement

recommended

parts

be

carried

of

that

any

sufficient

in

stock

that

RENEWAL

quantities

to

are

enable

worn,

broken,

the

PARTS

of

nearest

pany,

the Parts

When

parts

Sales

specify

by

Bulletin

ordering

Office

the

catalogue

No.

renewal

of

quantity

GEF-3883.

the

numbers

parts,

General

required

as

Electric

and

shown

address

describing

in

the

Com

Renewal

15

GEH-l7B

Type

IAC

Time

Overcurrent

Relay

:1/4

4

DRILL

HOLES

1,125

29MM

PANEL

SEMI-FLUSH

MTG.

4)

MTG.

4

406

12MM

LOCATION

10-32

SCREWS

6.187

157MM

SURFACE

MTG.

—

3/9

X

DRILL

5/8

HOLES

2

l5Mi

(2) FUR

0—32

1

STUDS

-

5/16—18

SURFACE

75 MM

CUTOUT

DRILLED

STUDS MTG.

NUMBER

97531

00000

8

10

BACK

MAY

156

1.

29MM

STUD

I

‘

6

VIEW

REPLACE

HOLES

NG

2

218. 5MM

FUR

TYPiCAL

INCHES

MM

Fig.

--;---

CUTLUT

•i

5,

14

PANEL SEMI-FLUSH

DIM.

20

DRILLING

FRONT

(K-6209271

843

72MM

1

687

4MM

MOUNTING

VIEW

181)

VIEW

FUR

Outline

I—

8.812

223MM

CASE

SHOWING

SURFACE

Panel

and

3.0

76MM

ASSEMBLY

MTG.

Drilling

ON

Dimensions

3/4

10

OF

STEEL

5

133MM

DRILL

HOLES

19MM

5/16-18

HARDWARE

PANELS

Relay

for

25

FUR

STUD

Types

PANEL

SURFACE

FRONT

(TYPICAL)

DRILLANG

VIEW

Relays

IAC

.500

12MM

MOUNTING

(11/91)

(200)

GENERAL

ELECTRIC

CO.,

POWER

SYSTEMS

MANAGEMENT

BUSINESS

DEPT..

MALVERN,

PA.

19355

GE 12IAC8OL, 12IAC8OL-A Instructions Manual

Specifications and Main Features

Frequently Asked Questions

User Manual