GE IAC59A User manual

INSTRUCTIONS

UNDERCURRENT

GET-21903

Supersedes

GEI-21903

Insert

Booklet

GEI-1753

AND

OVERCURRENT

RELAYS

Types

IAC59A,

1AC59B,

and

1AC59(

GENERALS

ELECT’

Undercurrent

and

Overcurrent

flelays

Type

IAC

Figure

(IC-6400264)

Time-Current

Characteristics

for

IAC59C

Relays.

Figure

(K-6400289)

Time-Current

Characteristics

for

Type

IAC59B

Relay

Type

IAC59A

and

Undercurrent

and

Overcurrent

Relays

Type

IAC

(Ih1)

LJTOUT

.21V

_G8

DSLL

ECE

15M

E44UI.45

CASE

HOLES)

[tOLLED

(OFA

,Ltsruo

(2Vk4?4)

DRILL

VIEW

SHOWIN

(IhLU)

IAMbA

DSILL

(Il

(to

HOLES)

(9MM)

PAN

DfILLING

F0l

MOHING

115

VOLTS

RTE1i

HLQUNCY

MF2

IHMER

IAC

AOJUST6(

RES

Figure

(K-6400302)

Type

IAC59A

and

IAC59B

Relays,

Test

Connections

PANEL

DWNG

SDdI-FWSH

MOUNTING

(FRONT

VIEW)

Figure

(6209271-6)

Outline

and

Panel

Drilling

for

the

Type

IAC59A

Relay

*Indicates

revision

UNDERCURRENT

AND

OVERCURRENT

RELAYS

TYPE

IAC

INTRODUCTION

These

instructions

are

supplement

instruc

tion

book

GEH-1753

which

included

this

book.

The

combination

the

two

form

complete

instruc

tions

for

the

Types

IAC59A,

JAC59B

arid

IAC59C

relays.

The Type

IAC59A

relay

similar

construc

tion

and

operation

the

Type

IAC51A

relay,

des

cribed

the

included

instructions,

except

that

has

double

throw

contacts

with

seal-in

unit

for

each

contact.

The

left-hand

contacts

are

adjusted

tap

value

current

while

the

right-hand

contacts

may

adjusted

close from

percent

tap

value.

The

Type

IAC59B

relay

similar

the

Type

IACS9A

relay

except

that

short

time relay

adjusted

close its

right-hand

contacts

when

the

current

reduced

tap

value.

The

left-hand

con

tact

may

adjusted

from

105

150

per

cent

tap

value.

MOUNTING

The

outline

and

panel

drilling

dimensions

for

these

relays

are

shown in

Fig.

this

supplement,

CON

NECTIONS

Internal

connection

diagrams

are

shown

fig.

and

Fig.

inclusive.

ADJUSTMENTS

AND

TESTS

With

connections

shown

Fig.

pickup

justments

and

time

checks

may

made.

The

relay is

energized

for

pickup

dropout

check

closing

Si.

Unless

otherwise

requested

the

IAC59A

set

the

factory

its

right

contacts

80%

tap

value

and

the

IAC59B

set

its

left

contacts

110%

tap

value.

desired

change

this

percentage

contact

spread,

the

following

procedure

necessary.

Turning

the

spring-adjusting

ring, as

described

under

“current

setting”

the

included

instructions,

affects

primarily

the

current

required

the

left

contacts,

Rotating

the

right-hand

moving

con

tact,

after

loosening

the

clamping

screws

holding

The

Type

LAC59C

relay

similar

the

Type

IAC59A

relay

except

that

the

seal-in

units

are

omitted.

BURDENS

Burdens

for

the

various relay

ratings

mini

mum

pick-up

current

and

cycles

are

given

the

following

table:

Mm—

Cont.

Relay

Tap

Pick-

Cur-

Volt-

Imp.

P,F.

Type

Range

rent

Amps

Ohms

IAC59A

0,5-2

0,5

1,17

4,71

.27

IACS9C

1.5—6

1.5

1,17

0,52

.25

4-16

4.0

1.36

0.08

.38

IAC59B

0,5-2

0.5 2.5 4.72

18,90

.29

1.5—6

1,5

7,5

4,68 2.08

.26

4—16

4,0

I492

0,31

.27

place,

changes

the

current

required

the

right contacts,

Each

these adjustments

affects

the

other,

hence

simultaneous

adjustment

for

clos

ing

left

and

closing

right

must

made

obtain

the

desired

contact

spread,

The

relays

are

adjusted

at the

factory

give

the

time

characteristics

shown

Fig.

and

Fig.

The

time

may

changed

slightly

changing

the

position

the

permanent

magnet

its

supporting

shelf.

general,

moving

the

magnet toward

the

back

the

relay

decreases

its

time

operation.

check

overcurrent

time,

suddenly

apply

the

desired

preset

current

the

relay

closing

Si.

The

time

read

the

timer

that

required

the

left contacts.

check

the

undercurrent

time close

and

and,

using

Ri,

adjust

the

current

value

greater

than

that

required

the

left-hand

contacts.

With

open,

use

set

the

current

the

desired

value

below

the

current

required

the

right-hand contacts.

Then

with

and

both

closed,

open

S2.

The

time

read

the

timer

that

required

for

the

right

contacts

when

the

current

suddenly

reduced

from

value

sufficient

the

left-hand

contacts,

predetermined

value,

INSTALLATION

These

instructions

not

purport

cover

details

variations

equipment

nor

provide

for

every

possible

contingency

met

connection

with

installation,

operation

maintenance.

Should

further

information

desired

or should

particular

problems

arise

which

az-c

not

covered

sufficiently

for

the

purchaser’s

purposes,

the

matter

should

referred

the

General

Electric

Company.

the

extent required

the

products

described

herein

meet

applicablo

ANSI,

IEP’E

and

WEMA

standards;

but

such

assurance

given

with

respect

loca

codes

and

ordinances

because

they

vary

greatly.

OPERATING

Figure

(K-6400242)

Type

IAC59A

and

IAC59B

Relays

Internal

Con

nections

(Front

View).

Un&rcurrent

and

Overcurrent

Relays

Type

IAC

SEAL—I

ELEMENT

SHORT

FINGER

OPERAT

COIL

LI.

—

SHORT

FINGR

Figure

(K-6400432) Type

IAC59C

Relay

Internal

Connections

(Front

View).

GENERAL ELECTRIC

COMPANY

POWER

SYSTEMS

MANAGEMENT

BUSINESS

DEPT.

PHILADELPHIA,

PA.

19142

GENERAL

ELECTRIC

7-80

2-(8

000

CJ1UU1

-v

-I

11<

-I

GEH-1753

Time

Overcurrent

Relays

Type

IAC

TOP

PIVOT

_____________

TAP

PLUG

SEAL-IN

UNIT

HOLDING COIL

SEAL-IN

UNIT

STATIONARY

CONTACT,

LEFT

SEAL-IN

UNIT

STATIONARY

CONTACT,

RIGHr

SEAL-IN

MOVING

CON

TA CT

ASSEMBLV

(S006996)

Front

View

—

(8006997)

8ar

View

FiBur

educLicnj

Tvp-

JAC

1ay

—

r’

LOWER

JEWEL

SCREW—_3

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