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,

—

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MAGNET 0151<

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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

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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

the

seal-in

in

parallel

the

main

seals

a

exposed

the

he

purposes,

requlred

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and

1

These type. on

moving

give

disk

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2

show

units

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contact

when

The

the

is

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disk

proper

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shaft

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,

1.0,

0.24,

in

operation

are

Electric

ANSI,

because

unit

is

the

main

unit

inverse

soundingan

currents

the

relay

for

very

and

overload

contacts.

CHARACTERISTICS

unit

are

may

close

as

the

dial

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set

contacts

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shown

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the

as

current

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the

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1).

in

Fig.

RATINGS

unit

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each

follows,

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1.2,

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or

not

Company.

IEEE

designed

having

4.0,

1.5

0.4

rrintenance.

covered

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to a

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

5.0

and

2.0

amperes.

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to

sufficiently

NEMA

vary

greatly.

in

all

time

alarm

or

two

increases

block.

determined

The

time-cur

3.

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any

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Figure

3

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Time-Current

Very-Inverse-Time

Curves

for

Characteristics

Type

IAC

Relays

with

4

GE 12IAC8OL, 12IAC8OL-A Instructions Manual

Specifications and Main Features

Frequently Asked Questions

User Manual