GE ICR51A User manual

INSTRUCTIONS

6

EH

-

1783

J

PHASE

SEQUENCE

AND

UNDERVOLTAGE

RELAYS

TYPES

ICR

53

B

ICR

54

A

ICR

51

A

ICR

53

A

ICR

54

B

GENERAL

ELECTRIC

Courtesy of NationalSwitchgear.com

GEH

—

1783

Phase

Sequence

And

Undervoltage

Relays

Type

ICR

OUTER

BLOCK

CRADLE

LATCH

INNER

,

«

<

#

»

«

BL

0

CK

m

INNER

BLOCK

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»

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.

£

i

>

-

OUTER

BLOCK

CASE

RESET

BUTTON

COVER

CONNECTING

PLUGS

(

8014332

)

Type

ICR

53

A

Relay

,

Unit

Disassembled

(

Front

View

)

Figure

1

T i

I

|

!

I

1

I

'

!

7

I

p i

1

VOLTS

TO

CLOSE

LETT

CONTACT

79

*

OF

flATtD

VOLTS

34

32

30

-

28

26

24

-

22

5

20

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s

-

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3

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3

»

2

3

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p

10

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6

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£

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4

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*

1

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v

-

\

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2

'

o

-

SO

TO

90

too

110

120

9 5

PER

CENT

Of

RATED

VOLTAGE

Figure

2

A

(

0203

A

8302

-

1

)

Average

Time

Characteristic

of

Relay

Type

ICR

51

A

COVER

PHOTO

(

8014333

)

2

Courtesy of NationalSwitchgear.com

PHASE

SEQUENCE

AND

UNDERVOLTAGE

RELAYS

TYPE

ICR

INTRODUCTION

The

Type

ICR

induction

-

disk

relays

are

designed

to

respond

to

phase

-

sequence

,

open

-

phase

and

undervoltage

.

APPLICATION

The

Type

ICR

relays

are

used

to

protect

AC

machines

from

undervoltage

and

when

starting

from

open

phase

or

reverse

phase

sequence

.

They

will

function

to

stop

the

machine

if

the

voltage

across

the

relay

terminals

falls

below

a

predetermined

value

.

Usually

these

relays

will

not

disconnect

a

running

motor

if

one

phase

of

the

supply

is

open

-

circuited

because

the

motor

will

supply

three

-

phase

potential

to

the

relay

even

with

one

phase

disconnected

from

the

source

.

The

Type

ICR

relays

are

also

used

for

automatic

throw

over

schemes

where

it

is

desired

to

check

the

presence

of

three

-

phase

voltage

of

correct

phase

sequence

.

Figures

4

to

6

show

typical

external

connections

of

the

various

relay

described

in

these

instructions

.

TABLE

I

*

Closing

of

Closed

Contact

(

in

%

of

Calibration

of

Open

Contact

)

Closing

of

Open

Contact

(

in

%

of

Rated

3

-

Phase

Voltage

)

Ave

.

Time

Characteristic

Curve

Relay

Type

Range

of

Adjustment

Factory

Setting

Range

of

Adjustment

Factory

Setting

Figure

2

A

Figure

2

A

Figure

2

B

Figure

2

B

Figure

3

Figure

3

ICR

51

A

(

1

)

ICR

51

A

(

2

)

ICR

53

A

ICR

53

B

ICR

54

A

ICR

54

B

75

-

100

75

-

100

75

-

100

75

-

100

75

-

100

75

-

100

75

90

75

-

100

75

-

100

75

-

100

75

-

100

89

90

89

90

89

90

89

90

(

1

)

ICR

51

A

1

thru

ICR

51

A

11

A

(

2

)

ICR

51

A

21

A

and

higher

*

Indicates

revision

These

instructions

do

not

purport

to

cover

all

details

or

variations

in

equipment

nor

provide

for

every

possible

contingency

to

be

met

in

connection

with

installation

,

operation

or

maintenance

.

Should

further

information

be

desired

or

should

particular

problems

arise

which

are

not

covered

sufficiently

for

the

purchaser

’

s

purposes

,

the

matter

should

be

referred

to

the

General

Electric

Company

.

To

the

extent

required

the

products

described

herein

meet

applicable

ANSI

,

IEEE

and

NEMA

standards

,

but

no

such

assurance

is

given

with

respect

to

local

codes

and

ordinances

because

they

vary

greatly

.

3

Courtesy of NationalSwitchgear.com

GEH

-

1783

Phase

Sequence

And

Undervoltage

RelaysType

ICR

T

10.0

VOLTS

TO

CLOSE

LEFT

CONTACT

-

*

90

ft

OF

RATED

VOLTS

TO

CLOSE

RIGHT

CONTACT

=

80

ft

OF

RATED

VOLTS

600

POINT

DRAG

MAGNET

8.0

6.0

t

/

>

TIM

TO

CLOSE

RIGHT

CONTACT

WHEN

VOLTAGE

IS

•

REOUCEO

FROM

RATED

VOLTS

a

o

u

iu

t

/

i

TIME

TO

~

CLOSE

LEFT

CONTACT

x

*

4.0

Ui

X

2.0

0

10

20

30

60

40

50

70

80

90

100

PER

CENT

OF

RATED

VOLTAGE

Figure

2

B

(

0376

A

0950

)

Average

Time

Characteristic

of

Relay

Types

ICR

53

A

and

ICR

53

B

i

.

o

VOLTS

TO

CLOSE

LEFT

CONTACT

-

90

ft

OF

RATED

VOLTS

TO

CLOSE

R

I

GH

T

CONTACT

-

80

ft

OF

RATED

VOLTS

0.8

TINE

TO

CLOSE

RIGHT

CONTACT

WHEN

VOLTAGE

IS

REDUCED

FROM

RATED

VOLTS

i

«

/

>

TJME

TO

o

0.6

CLOSE

LEFT

CONTACT

c

_

>

Ui

«

/

>

/

UJ

•

—

0.4

X

0.2

0

60

10

20

30

70

90

100

40

80

50

PER

CENT

OF

RATED

VOLTAGE

Figure

3

(

0376

A

0949

-

3

)

Average

Time

Characteristic

ICR

54

A

Relay

of

Type

4

Courtesy of NationalSwitchgear.com

GEH

-

1783

Phase

Sequence

And

Undervoltage

RelaysType

ICR

OPERATING

CHARACTERISTICS

ADJUSTMENT

RANGES

AND

OPERATING

TIME

The

range

of

adjustment

and

the

operating

time

characteristic

references

The

values

of

three

-

phase

for

the

various

relays

are

given

in

Table

I

.

voltages

given

are

for

the

proper

sequence

applied

to

the

relay

below

which

the

open

contact

will

open

or

the

closed

contact

(

where

used

)

will

close

.

Unless

a

specific

setting

for

the

relays

is

given

on

the

requisition

,

the

factory

will

set

the

relay

for

the

values

shown

.

The

time

characteristic

curves

referred

to

in

Table

I

are

for

factory

settings

.

RATINGS

The

Type

ICR

relays

are

available

for

120

,

240

,

and

480

volt

circuits

.

CONTACT

RATINGS

The

current

-

carrying

rating

of

the

contact

circuit

is

determined

by

whether

the

relay

has

a

seal

-

in

unit

and

by

the

tap

used

on

the

seal

-

in

coil

.

The

values

for

the

three

possible

arrangements

are

given

in

the

following

table

:

Yes

Seal

-

In

Unit

No

0.2

amp

2.0

amps

Seal

-

In

Unit

Tap

0.8

amp

3.5

amps

Carry

Continuously

2.0

amps

Carry

for

Trip

Duty

(

250

volt

of

less

)

30

amps

30

amps

5

amps

DC

Resistance

of

Seal

-

In

Coil

0.13

ohms

7

ohms

60

-

Cycle

Impedance

of

Seal

-

In

Coil

52

ohms

0.53

ohms

When

the

contacts

of

the

induction

unit

are

not

by

-

passed

by

the

seal

-

in

The

interrupting

unit

contacts

,

they

may

try

to

interrupt

the

circuit

,

rating

of

the

contacts

for

non

-

inductive

loads

are

as

follows

:

DC

Amps

AC

Amps

Make

and

Interrupt

at

:

1.50

0.30

125

volts

250

volts

600

volts

0.15

0.75

0.00

5

Courtesy of NationalSwitchgear.com

GEH

-

1783

Phase

Sequence

And

Undervoltage

RelaysType

ICR

BURDENS

The

burdens

imposed

by

the

two

potential

circuits

at

rated

voltage

and

60

cycles

are

as

follows

:

Volts

Coil

Circuit

Watts

Varsft

V

A

PF

120

5

-

6

7

-

8

5

-

6

7

-

8

5

-

6

7

-

8

2.15

0.41

4.70

5.20

120

0.66

2.30

2.40

0.27

240

3.50

13.15

13.3

0.26

240

0.41

6.38

6.40

0.06

480

2.83

23.8

0.12

24.0

480

0.45

23.0

0.02

tfCapacitive

RECEIVING

,

HANDLING

,

AND

STORAGE

These

relays

,

when

not

included

as

a

part

of

a

control

panel

,

will

be

shipped

in

cartons

designed

to

protect

them

against

damage

.

Immediately

upon

receipt

of

the

relay

an

examination

should

be

made

for

any

damage

sustained

during

shipment

.

If

injury

or

damage

resulting

from

rough

handling

is

evident

,

a

claim

should

be

filed

at

once

with

the

transportation

company

and

the

nearest

Sales

Office

of

the

General

Electric

Company

promptly

notified

.

i

2

3

2

i

3

PHASE

SEQUENCE

TO

Close

LEFT

CONTACTS

3

1

PHASE

SEQUENCE

TO

CLOSE

CONTACTS

i

HI

7

6

*

16

7

^

17

47

LEFT

UC

1

<

r

-

L

CONTACT

2

~

r

CIRCUIT

47

10

20

Hi

5

yLC

s

7

'

T

'

C

47

6

47

RIGHT

UC

USE

DOTTED

CONNECTIONS

IF

POTENTIAL

TRANSFORMERS

ARE

NOT

USED

.

,

L

1

11

8

y

18

DEVICE

FUNCTION

NUMBERS

47

-

PHASE

SEQUENCE

AND

UNDERVOLTAGE

RELAY

TYPE

ICR

UPPER

COIL

1

C

-

LOWER

COIL

DEVICE

FIJNCT

.

QN

NUMBERS

47

PHASE

SEQUENCE

AND

UNOERVOlTAGf

RELAY

TYPE

ICR

UC

-

UPPER

OPERATING

COIL

LOWER

OPERA

!

INC

COIL

UC

3

2

1

2

LC

3

1

f

N

2

113

7

Al

7

3

7

V

'

/

V

3

-

PHASE

4

-

WIRE

il

<

,

*

1

r

uc

v

,

LC

47

rcr

.

i

6

^

16

8

^

18

e

>

'

N

Figure

4

(

0376

A

0947

-

3

)

Typical

External

Connections

for

Type

ICR

51

A

Relay

Figure

5

(

0376

A

0953

-

3

)

Typical

External

Connections

for

Type

ICR

53

B

Relay

6

Courtesy of NationalSwitchgear.com

GEH

-

1783

Phase

Sequence

And

Undervoltage

RelaysType

ICR

Reasonable

care

should

be

exercised

in

unpacking

the

relay

in

order

that

none

of

the

parts

are

injured

nor

the

adjustments

disturbed

.

If

the

relays

are

not

to

be

installed

immediately

,

they

should

be

stored

in

their

original

cartons

in

a

place

that

is

free

from

moisture

,

dust

,

and

metallic

chips

.

Foreign

matter

collected

on

the

outside

of

the

case

may

find

its

way

inside

when

the

cover

is

removed

and

cause

trouble

in

the

operation

of

the

relay

.

DESCRIPTION

The

relays

covered

by

these

instructions

are

identified

by

model

The

main

constructional

differences

of

these

models

are

given

in

the

following

table

and

are

described

under

RELAY

TYPES

.

numbers

.

Model

Contacts

Time

Dial

Seal

-

In

Int

.

Conn

.

Unit

12

ICR

51

A

(

-

)

A

12

ICR

53

A

(

-

)

A

12

ICR

53

B

(

-

)

A

12

ICR

54

A

(

-

)

A

121

CR

54

B

(

—

)

A

One

Open

Double

Throw

Double

Throw

Double

Throw

Double

Throw

Yes

No

Figure

7

Figure

8

Figure

9

Figure

8

Figure

9

No

Yes

No

Yes

No

RELAY

TYPES

The

Type

ICR

51

A

relay

was

designed

for

use

in

three

-

phase

circuits

,

has

a

single

circuit

-

closing

contact

which

opens

on

undervoltage

or

reversed

-

phase

sequence

,

and

a

time

dial

for

adjusting

the

time

delay

with

which

the

contacts

close

.

The

relay

does

not

contain

a

target

.

When

the

relay

is

adjusted

to

open

its

contacts

at

75

%

of

rated

voltage

,

the

time

required

to

close

the

contact

with

rated

voltage

applied

and

the

time

dial

set

on

number

10

is

10

seconds

.

It

The

Type

ICR

53

A

relay

was

designed

for

use

in

three

-

phase

circuits

.

It

has

double

-

throw

,

single

-

pole

contacts

,

undervoltage

or

reverse

phase

sequence

.

The

relay

has

a

target

and

seal

-

in

unit

which

is

in

series

with

its

closed

contact

.

The

relay

does

not

contain

a

time

dial

.

The

left

-

hand

contacts

open

on

When

the

relay

is

adjusted

for

90

%

pickup

and

80

%

dropout

,

the

time

required

to

close

the

normally

-

closed

contacts

,

when

the

voltage

is

suddenly

dropped

from

rated

voltage

to

zero

(

0

)

volts

,

is

1.2

seconds

.

The

Type

ICR

53

B

relay

is

similar

to

the

Type

ICR

53

A

relay

except

that

the

target

and

seal

-

in

unit

is

omitted

.

7

Courtesy of NationalSwitchgear.com

GEH

-

1783

Phase

Sequence

And

Undervoltage

RelaysType

ICR

f

:

QST

?

CL

3

-

S

5

T

r

4

:

X

H

-

i

*

1

s

r

-

*

>

c

±

tz

*

1

V

e

c

11

•

|

20

%

y

VC

TOR

START

.

No

CONTROL

EQUIPMENT

*

A

VCTOR

$

TA

*

T

TNG

EQUIPMENT

T

DEVICE

FUNCT

ON

NUMBERS

PHASE

SEQUENCE

AND

UNDERVOLTAGE

RELAY

TYPE

1

CP

L

’

PPER

OPERATING

C

01

L

uO

*

ER

OPERATING

CO

!

L

SEAL

-

IN

UNIT

47

>

'

*

w

*

UC

VV

V

^

v

^

yr

5

7

I

LC

MOTOR

S

I

2

6

8

*

-

SHORT

F

:

NG

-

ER

Figure

6

(

0376

A

0951

-

2

)

Typical

External

Connections

for

Relay

Types

ICR

53

A

and

ICR

54

A

Figure

7

(

0362

A

0629

-

2

)

Internal

Connections

for

Type

ICR

51

A

Relay

(

Front

View

)

15

17

21

11

15

17

t

16

18

II

20

16

10

A

/

v

/

\

A

*

20

A

*

4

*

A

*

A

~

h

£

Cl

C

2

i

-

G

L

E

“

F

1

#

=

P

'

yE

H

7

T

ex

\

A

^

r

*

V

»

*

''

j

)

I

1

I

V

I

10

l

%

8

6

*

-

SHORT

F

I

NGER

*

3

HCRT

RMSEK

Figure

8

(

0362

A

0633

-

4

)

Internal

Connections

for

Relay

Types

ICR

53

and

ICR

54

A

(

Front

View

)

Figure

9

(

0362

A

0634

-

4

)

Internal

Connections

for

Type

ICR

53

B

and

ICR

54

B

Relays

(

Front

View

)

8

Courtesy of NationalSwitchgear.com

GEH

-

1783

Phase

Sequence

And

Undervoltage

RelaysType

ICR

CRADLE

TOP

PIVOT

SEAL

-

IN

UNIT

0

;

SK

SHAFT

STATIONARY

BRUSH

ANO

CONTACT

ASSEMBLIES

CAPACITORS

MOVING

-

CONTACTS

WATTMETRIC

ELEMENT

CONTROL

SPRING

—

DISK

DRAG

MAGNET

%

Figure

11

(

8014331

)

Type

ICR

53

A

Relay

,

Unit

in

Cradle

(

Rear

View

)

Figure

10

(

8014330

)

Type

ICR

53

A

Relay

,

Unit

in

Cradle

(

Front

View

)

The

Type

ICR

54

A

relay

is

similar

to

the

Type

ICR

53

A

relay

except

that

it

has

faster

operating

times

.

When

the

relay

is

adjusted

to

pick

up

at

90

%

and

drop

out

at

80

%

of

rated

voltage

,

the

time

required

to

close

the

normally

-

closed

contact

when

the

voltage

instantaneously

drops

from

rated

voltage

to

zero

volts

is

0.17

second

.

The

Type

ICR

54

B

is

similar

to

the

Type

ICR

54

A

relay

except

that

the

target

and

seal

-

in

unit

is

omitted

.

Relay

Types

ICR

53

A

,

ICR

53

B

,

ICR

54

A

,

and

ICR

54

B

contain

a

contact

that

is

closed

when

the

relay

is

de

-

energized

.

For

this

reason

,

these

relays

are

supplied

in

double

-

end

drawout

cases

.

The

external

connections

are

such

that

the

relay

coils

are

energized

when

either

the

upper

or

lower

connection

plug

is

put

in

place

.

The

relay

will

therefore

have

time

to

open

its

closed

contact

before

the

second

connection

plug

can

be

put

in

place

,

necessary

to

have

both

plugs

in

place

before

the

contact

circuits

are

completed

.

It

is

INTERNAL

CONSTRUCTION

The

operating

unit

is

similar

to

that

used

in

a

standard

watthour

meter

,

except

that

the

current

coil

is

replaced

by

a

second

potential

coil

,

induction

disk

(

Figure

10

)

is

embossed

to

ensure

flatness

and

to

give

increased

rigidity

.

The

damping

magnet

consists

of

a

pair

of

alnico

magnets

enclosed

in

a

steel

circuit

.

be

moved

for

time

adjustments

.

The

relays

have

high

pressure

,

silver

-

to

-

silver

contacts

,

contacts

are

adjustable

and

movable

contact

direct

acting

.

The

It

is

mounted

by

clamp

screws

on

a

shelf

along

which

it

can

The

fixed

9

Courtesy of NationalSwitchgear.com

GEH

-

1783

Phase

Sequence

And

Undervoltage

RelaysType

ICR

The

upper

bearings

consist

of

a

polished

steel

and

a

bronze

guide

bearing

.

It

provides

a

definite

alignment

of

the

relay

shaft

.

The

lower

bearing

consists

of

a

polished

steel

pivot

that

is

carried

by

a

jewel

bearing

.

The

jewel

is

seated

on

a

spring

which

minimizes

shock

.

When

used

,

the

seal

-

in

unit

is

mounted

to

the

left

of

the

shaft

as

shown

in

Figure

10

.

This

unit

has

its

coil

in

series

and

its

contacts

in

parallel

with

the

main

contacts

such

that

when

the

main

contacts

close

,

the

seal

-

in

unit

picks

up

and

seals

in

.

When

the

seal

-

in

unit

picks

up

,

it

raises

a

target

into

view

which

latches

up

and

remains

exposed

until

released

by

pressing

a

button

beneath

the

lower

left

corner

of

the

cover

.

CASE

The

case

is

suitable

for

either

surface

or

semiflush

panel

mounting

and

The

cover

an

assortment

of

hardware

is

provided

for

either

mounting

,

attaches

to

the

case

and

also

carries

the

reset

mechanism

when

one

is

required

.

Each

cover

screw

has

provision

for

a

sealing

wire

.

The

case

has

studs

or

screw

connections

at

both

ends

or

at

the

bottom

only

for

the

external

connections

.

The

electrical

connections

between

the

relay

units

and

the

case

studs

are

made

through

spring

backed

contact

fingers

mounted

in

stationary

molded

inner

and

outer

blocks

between

which

nests

a

removable

connecting

plug

which

completes

the

circuits

.

The

outer

blocks

,

attached

to

the

case

,

have

the

studs

for

the

external

connections

,

and

inner

blocks

have

the

terminals

for

the

internal

connections

.

The

relay

mechanism

is

mounted

in

a

steel

framework

called

the

cradle

and

is

a

complete

unit

with

all

leads

being

terminated

at

the

inner

block

.

This

cradle

is

held

firmly

in

the

case

with

a

latch

at

the

top

and

the

bottom

and

by

a

guide

at

the

back

of

the

case

.

The

cases

and

cradles

are

so

constructed

that

the

relay

cannot

be

inserted

in

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

in

place

.

The

cover

,

which

is

fastened

to

the

case

by

thumbscrews

,

holds

the

connecting

plug

in

place

.

To

draw

out

the

relay

unit

the

cover

is

first

removed

,

and

the

plug

drawn

out

.

Shorting

bars

are

provided

in

the

case

to

short

the

current

transformer

circuits

.

The

latches

are

then

released

,

and

the

relay

unit

can

be

easily

drawn

out

.

To

replace

the

relay

unit

,

the

reverse

order

is

followed

.

10

Courtesy of NationalSwitchgear.com

GE ICR51A User manual

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