ABB CR Series Manual

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Instruction

Leaflet

I

.

L

41

-

131

P

Aim

mpif

ABB

Povwr

T

&

O

Company

Inc

.

Relay

Divisions

Coral

Springs

,

FL

33065

Directional

Overcurrent

Relays

Types

:

CR

,

CRC

,

CRP

AND

CRD

Effective

:

April

1986

Supersedes

I

.

L

41

-

131

N

Dated

February

1976

O

Denotes

Change

Since

Previous

Issue

CAUTION

:

Before

putting

relays

into

service

,

remove

all

type

CRD

relays

also

utilize

an

internal

phase

shifting

blocking

which

may

have

been

inserted

for

the

purpose

of

mechanism

.

The

principal

component

parts

of

the

relay

securing

the

parts

during

shipment

,

make

sure

that

all

mov

-

and

their

locations

are

shown

in

Figs

.

1

,

2

,

3

and

4

.

ing

parts

operate

freely

,

inspect

the

contacts

to

see

that

they

are

clean

and

close

properly

,

and

operate

the

relay

to

A

.

Overcurrent

Unit

(

CO

)

check

the

settings

and

electrical

connections

.

APPLICATION

The

overcurrent

unit

operates

on

the

induction

principle

.

A

main

tapped

coil

located

on

the

center

leg

of

an

“

E

”

type

laminated

structure

produces

a

flux

which

divides

and

re

-

These

time

delayed

directional

overcurrent

relays

are

turns

through

the

outer

legs

.

A

shading

coil

causes

the

flux

used

to

detect

phase

or

ground

faults

in

a

particular

direc

-

through

the

left

leg

to

lag

the

main

pole

flux

.

The

out

-

of

-

tion

on

a

power

system

and

to

initiate

isolation

of

these

phase

fluxes

thus

produced

in

the

air

gap

cause

a

contact

faults

.

Each

is

torque

-

controlled

by

a

built

-

in

high

speed

closing

torque

,

directional

unit

.

B

.

Indicating

Contactor

Switch

Unit

(

ICS

)

The

CR

is

a

phase

relay

with

a

directional

unit

polarized

by

phase

-

to

-

phase

voltage

while

the

CRC

,

CRP

and

CRD

are

ground

relays

.

The

CRC

directional

unit

is

zero

-

sequence

-

current

polarized

,

the

CRP

is

zero

-

sequence

-

voltage

polar

-

spring

mounted

contacts

are

attached

,

is

attracted

to

the

ized

and

the

CRD

contains

two

directional

units

,

one

zero

-

magnetic

core

upon

energization

of

the

switch

.

When

the

sequence

-

current

polarized

and

another

zero

-

sequence

-

switch

closes

,

the

moving

contacts

bridge

two

stationary

voltage

polarized

.

contacts

,

completing

the

trip

circuit

.

Also

during

this

opera

-

tion

two

fingers

on

the

armature

deflect

a

spring

located

on

The

choice

of

the

CRC

or

CRP

is

dependent

on

the

reli

-

the

front

of

the

switch

,

which

allows

the

operation

indi

-

ability

of

the

zero

-

sequence

polarizing

current

or

voltage

cator

target

to

drop

.

The

target

is

reset

from

the

outside

of

for

all

ground

faults

with

all

power

system

variations

,

the

case

by

a

push

rod

located

at

the

bottom

of

the

cover

.

Where

neither

alone

is

generally

reliable

for

all

ground

faults

,

but

one

or

the

other

is

always

present

for

ground

faults

,

the

dual

polarized

CRD

is

used

.

The

indicating

contactor

switch

is

a

small

d

-

c

operated

clapper

type

device

.

A

magnetic

armature

,

to

which

leaf

-

The

front

spring

,

in

addition

to

holding

the

target

,

pro

-

vides

restraint

for

the

armature

and

thus

controls

the

pickup

value

of

the

switch

.

CONTENTS

C

.

Indicating

Instantaneous

Trip

Unit

(

IIT

)

This

instruction

leaflet

applies

to

the

following

types

of

relays

:

Type

CR

Voltage

Polarized

Phase

Relay

Type

CRC

Current

Polarized

Ground

Relay

Type

CRP

Voltage

Polarized

Ground

Relay

Type

CRD

Dual

Polarized

Ground

Relay

CONSTRUCTION

AND

OPERATION

The

instantaneous

trip

unit

is

a

small

a

-

c

operated

clap

-

per

type

device

.

A

magnetic

armature

,

to

which

leaf

-

spring

mounted

contacts

are

attached

,

is

attracted

to

the

magnetic

core

upon

energization

of

the

switch

.

When

the

switch

closes

,

the

moving

contacts

bridge

two

stationary

contacts

completing

the

trip

circuit

.

Also

during

the

operation

two

fingers

on

the

armature

deflect

a

spring

located

on

the

front

of

the

switch

which

allows

the

operation

indicator

target

to

drop

.

The

target

is

reset

from

the

outside

of

the

case

by

a

The

various

types

of

relays

as

outlined

in

the

contents

push

rod

located

at

the

bottom

of

the

cover

,

consists

of

a

directional

unit

or

units

,

an

overcurrent

unit

,

an

indicating

contactor

switch

unit

and

an

indicating

in

-

stantaneous

trip

unit

when

required

.

The

type

CRP

and

vides

the

adjustable

pickup

range

.

A

core

screw

accessible

from

the

top

of

the

switch

pro

-

All

possible

contingencies

which

may

arise

during

installation

,

operation

or

maintenance

,

and

ail

details

and

variations

of

this

equipment

do

not

purport

to

be

covered

by

these

instructions

.

If

further

information

is

desired

by

purchaser

regarding

this

particular

installation

,

operation

or

maintenance

of

this

equipmentf

frte

local

ABB

Power

T

&

D

Company

Inc

.

representative

should

be

contacted

.

Printed

in

U

.

SA

Courtesy of NationalSwitchgear.com

ro

H

-

<

“

0

m

n

vo

n

70

n

n

VO

TJ

>

z

o

o

VO

o

VO

m

r

>

-

<

i

/

>

F

/

g

,

2

*

Directional

Unit

•

l

«

5

fof

/

onary

Contact

.

5

tat

/

onary

Contact

pressure

spring

.

3

-

Magnef

/

c

adjusting

plugs

,

4

-

Upper

bear

/

ng

screw

.

Mov

/

ng

element

assembly

.

6

-

Spr

/

ng

ad

faster

clamp

.

7

«

Currenf

8

/

as

Vane

.

2

-

F

/

g

,

7

Type

CF

Relay

Without

Case

,

I

-

Directional

Unit

(

D

)

,

2

-

Overcurrent

Unit

(

CO

)

,

3

-

lndlcatlng

Con

-

tactor

Switch

(

ICS

)

,

5

-

Courtesy of NationalSwitchgear.com

I

.

L

.

41

-

131

P

TYPES

CR

,

CRC

,

CRP

AND

CRD

RELAYS

Fig

.

3

.

Time

Overcurrent

Unit

(

Front

View

)

.

1

-

Tap

Block

.

2

-

Time

Dial

.

3

-

Control

Spring

Assembly

.

4

-

Disc

.

5

-

Stationary

Contact

Assembly

.

6

-

Magnetic

Plugs

.

7

-

Permanent

Magnet

.

Fig

.

4

.

Indicating

Instantaneous

Trip

Unit

(

IIT

)

.

3

Courtesy of NationalSwitchgear.com

TYPES

CR

,

CRC

,

CRP

AND

CRD

RELAYS

INTERNAL

SCHEMATIC

INTERNAL

SCHEMATIC

DIRECTIONAL

UNIT

OIRECTIONAL

UNIT

.

INDICATING

CONTACTOR

SWITCH

INDICATING

CONTACTOR

SWITCH

—

-

<

cjH

D

—

<

>

co

I

INDUCTION

UNIT

INDUCTION

UNIT

n

n

o

'

CO

d

=

dp

*

CO

CS

-

-

J

:

4

iCS

coi

.

y

CO

±

A

-

CO

±

ICS

ICS

^

«

ED

HANDLE

-

TEST

SWITCH

CURRENT

TEST

itCt

CHASSIS

OPERATED

SHORTING

SWITCH

•

TERMINAL

^

RED

RANOLE

i

^

-

HST

SWITCH

-

f

CURRENT

TEST

JACK

£

_

J

CHASSIS

OPEUTED

'

1

SNORTING

SWITCH

n

'

r

"

6

*

o

'

o

'

‘

o

'

9

T

f

%

-

¥

f

'

6

'

'

6

~

o

6

o

“

o

'

o

u

£

_

fi

>

_

°

_

_

P

_

Sie

o

L

_

0

_

J

?

_

_

q

_

o

_

o

_

<

>

iK

3

_

0

H

®

1

®

®

r

®

r

.

g

)

©

^

©

1

®

©

@

©

0

(

i

8

*

*

>

^

£

7

FRONT

VIEW

FRONT

VIEW

WITH

RELATIVE

INSTANTANEOUS

POLARITY

AS

SHOW

THE

OIRECTIONAL

WIT

CONTACTS

CLOSE

WITH

RELATIVE

INSTANTANEOUS

POLARITf

AS

SHOWN

THE

OIRECTIONAL

UNIT

CONTACTS

CLOSE

Sub

3

57

D

4543

Sub

2

57

D

4547

Fig

.

5

.

Internal

Schematic

of

double

trip

,

directional

over

-

current

relay

type

CR

in

type

FT

21

Case

.

For

the

single

trip

relay

the

circuits

associated

with

ter

-

minal

2

are

omitted

,

57

D

4549

.

Fig

.

6

.

Internal

Schematic

of

double

trip

,

directional

over

-

current

relay

type

CRC

in

type

FT

21

Case

.

For

the

single

trip

relay

the

circuits

associated

with

ter

•

minal

2

are

omitted

,

S

7

D

4539

.

D

.

Directional

Unit

(

D

)

The

bridge

is

secured

to

the

electromagnet

and

frame

by

two

mounting

screws

,

in

addition

to

holding

the

upper

pin

bearing

,

the

bridge

is

used

for

mounting

the

adjustable

stationary

contact

housing

,

stationary

contact

housing

is

held

in

position

by

a

spring

type

clamp

.

The

spring

adjuster

is

located

on

the

underside

of

the

bridge

and

is

attached

to

the

moving

contact

arm

by

a

spiral

spring

.

The

spring

adjuster

is

also

held

in

place

by

a

spring

type

clamp

.

With

the

contacts

closed

,

the

electrical

con

-

nection

is

made

through

the

stationary

contact

hous

-

ing

clamp

,

to

the

moving

contact

,

through

the

spiral

spring

out

to

the

spring

adjuster

clamp

.

The

directional

unit

is

a

product

induction

cylinder

type

unit

operating

on

the

interaction

between

the

polarizing

cir

-

cuit

flux

and

the

operating

circuit

flux

.

Mechanically

,

the

directional

unit

is

composed

of

four

basic

components

:

a

die

-

cast

aluminum

frame

,

an

electro

-

magnet

,

a

moving

element

assembly

,

and

a

molded

bridge

.

The

frame

serves

as

the

mounting

structure

for

the

mag

-

netic

core

.

The

magnetic

core

which

houses

the

lower

pin

bearing

is

secured

to

the

frame

by

a

locking

nut

.

The

bear

-

ing

can

be

replaced

,

if

necessary

,

without

having

to

remove

the

magnetic

core

from

the

frame

.

The

The

contacts

of

the

directional

unit

are

con

-

nected

in

series

with

the

shading

coil

of

the

over

-

current

unit

,

thus

giving

directional

control

of

the

overcurrent

unit

,

relay

from

operating

for

faults

in

the

non

-

tripping

direction

.

The

electromagnet

has

two

series

-

connected

polarizing

coils

mounted

diametrically

opposite

one

another

:

two

series

-

connected

operating

coils

mounted

diametrically

opposite

one

another

;

two

magnetic

adjusting

plugs

;

upper

and

lower

adjusting

plug

clips

,

and

two

locating

pins

.

The

locating

pins

are

used

to

accurately

position

the

lower

pin

bearing

,

which

is

mounted

on

the

frame

,

with

respect

to

the

upper

pin

bearing

,

which

is

threaded

into

the

bridge

.

The

electromagnet

is

secured

to

the

frame

by

four

mounting

screws

.

This

arrangement

prevents

the

CHARACTERISTICS

The

time

characteristics

of

the

directional

over

-

current

relays

are

designated

by

specific

numbers

as

indicated

in

Table

I

(

e

.

g

.

CR

-

8

)

.

TABLE

I

The

moving

element

assembly

consists

of

a

spiral

spring

,

contact

carrying

member

,

and

an

alu

-

minum

cylinder

assembled

to

a

molded

hub

which

holds

the

shaft

.

The

shaft

has

removable

top

and

bottom

jewel

bearings

.

The

shaft

rides

between

the

bottom

pin

bearing

and

the

upper

pin

bearing

with

the

cylinder

rotating

in

an

air

gap

formed

by

the

electro

-

magnet

and

the

magnetic

core

.

The

stops

for

the

moving

element

contact

arm

are

an

integral

part

of

the

bridge

.

Time

Characteri

Stics

Designation

Short

Time

Long

Time

Definite

Time

Moderately

Inverse

Time

Inverse

Time

Very

Inverse

Time

Extremely

Inverse

Time

2

5

6

7

8

9

11

4

Courtesy of NationalSwitchgear.com

I

.

L

.

41

-

131

P

TYPES

CR

,

CRC

,

CRP

AND

CRD

RELAYS

INTERNAL

SCHEMATIC

UPPER

OIRECTIOXAL

UNIT

LOWER

DIRECTIONAL

UNIT

0

i

D

—

f

UPPER

DIRECTIONAL

|

INDICATING

CONTACTOR

SNITCH

ICS

*

4

"

UNIT

LOVER

DIRECTIONAL

UNIT

/

I

;

i

,

ICS

D

i

.

1

/

:

t

>

>

^

i

>

CO

^

r

-

i

.

_

INDUCTION

UNIT

0

I

coj

/

\

&

1

T

CHASSIS

OPERATED

SHORTING

SNITCH

RED

HANDLE

K

—

TEST

SNITCH

-

CURRENT

TEST

JACK

,

TERMINAL

•

ITU

RELATIVE

INSTANTANEOUS

POLARITY

AS

SHOWN

THE

01

RECTI

ORAL

UNIT

CONTACTS

CLOSE

J

_

1

~

X

l

A

.

“

'

v

>

X

i

-

0

3

i

-

2

hOV

0

<

t

I

t

>

rrT

®

v

*

vi

Sub

3

57

D

4559

FRONT

vlEw

Fig

.

7

.

Internal

Schematic

of

double

trip

,

directional

over

-

current

relay

type

CRP

in

type

FT

21

Case

.

For

the

single

trip

relay

the

circuits

associated

with

ter

-

minal

2

are

omitted

,

57

D

4545

.

Fig

.

8

.

Internal

Schematic

of

double

trip

,

directional

over

-

current

relay

type

CRD

in

type

FT

31

Case

.

For

the

single

trip

relay

the

circuits

associated

with

ter

-

minal

2

are

omitted

,

57

D

4561

.

The

relays

are

generally

available

in

the

follow

-

ing

overcurrent

unit

current

ranges

:

Trip

Circuit

Constants

Indicating

Contactor

Switch

—

0.2

amp

tap

6.5

ohms

d

-

c

resistance

2.0

amp

tap

0.15

ohms

d

-

c

resistance

Type

CR

Relay

Range

Taps

0.5

-

2.5

0.5

0.6

0.8

1.0

1.5

2.0

2.5

2

2.5

3

3.5

4

4

5

6

7

8

10

12

2

6

5

6

4

-

12

This

voltage

polarized

type

relay

is

intended

for

phase

fault

protection

and

the

directional

unit

has

its

maximum

torque

when

the

current

leads

the

voltage

by

approximately

30

°

.

The

directional

unit

minimum

pick

-

up

is

1

volt

and

4

amperes

at

its

maximum

torque

angle

for

the

4

to

12

ampere

range

relays

and

1

volt

and

2

amperes

for

the

2

to

6

ampere

and

0.5

to

2.5

ampere

range

relays

.

These

relays

may

have

either

single

or

double

circuit

closing

contacts

for

tripping

either

one

or

two

circuit

breakers

.

The

time

vs

.

current

characteristics

are

shown

in

Figs

.

13

to

19

.

These

characteristics

give

the

con

-

tact

closing

time

for

the

various

time

dial

settings

when

the

indicated

multiples

of

tap

value

current

are

applied

,

to

the

relay

.

The

directional

unit

should

be

connected

using

the

cur

-

rent

in

one

-

phase

wire

and

the

potential

across

the

other

two

-

phase

wires

.

This

connection

is

commonly

referred

to

as

the

90

°

connection

.

When

utilizing

the

90

°

connection

the

maximum

torque

of

the

relay

occurs

when

the

fault

current

lags

its

100

%

P

.

F

.

position

by

approximately

60

°

.

See

Fig

.

21

.

Type

CRC

Relay

Trip

Circuit

The

main

contacts

will

safely

close

30

amperes

at

250

volts

d

-

c

and

the

seal

-

in

contacts

of

the

in

-

dicating

contactor

switch

will

safely

carry

this

cur

-

rent

long

enough

to

trip

a

circuit

breaker

.

The

indicating

instantaneous

trip

contacts

will

safely

close

30

amperes

at

250

volts

d

-

c

,

and

will

carry

this

current

long

enough

to

trip

a

breaker

.

The

current

polarized

type

relay

is

intended

for

ground

fault

protection

and

operates

on

residual

current

.

See

Fig

.

23

.

The

type

CRC

relay

has

its

maximum

torque

when

the

operating

current

leads

the

polarizing

current

by

approximately

40

°

.

The

direc

-

tional

unit

minimum

pick

-

up

is

0.5

ampere

in

each

winding

in

phase

for

the

0.5

to

2.5

ampere

and

the

2

to

6

ampere

range

relays

.

The

indicating

contactor

switch

has

two

taps

that

provide

a

pickup

setting

of

0.2

or

2

amperes

.

To

change

taps

requires

connecting

of

lead

located

in

front

of

the

tap

block

to

the

desired

setting

by

means

of

a

screw

connection

.

5

Courtesy of NationalSwitchgear.com

TYPES

CR

,

CRC

,

CRP

AND

CRD

RELAYS

O

CAUTION

:

Since

the

tap

block

connector

screw

carries

operating

current

,

be

sure

that

the

screw

is

turned

tight

.

IN

ORDER

TO

AVOID

OPENING

CURRENT

TRANS

-

FORMER

CIRCUITS

WHEN

CHANGING

TAPS

UNDER

LOAD

,

THE

RELAY

MUST

BE

FIRST

REMOVED

FROM

THE

CASE

.

Chassis

operating

shorting

switches

on

the

case

will

short

the

secondary

of

the

current

transformer

.

The

taps

should

then

be

changed

with

the

relay

outside

of

the

case

and

then

re

-

inserted

into

the

case

.

Instantaneous

Reclosing

Type

CRP

Relay

The

voltage

polarized

relay

is

intended

for

ground

fault

protection

and

has

its

maximum

torque

when

the

current

lags

the

voltage

by

approximately

60

°

.

The

shifting

of

the

maximum

torque

angle

has

been

ac

-

complished

by

the

use

of

an

internally

mounted

phase

shifter

as

illustrated

in

Fig

.

7

.

The

type

CRP

relay

operates

on

residual

voltage

and

residual

current

.

See

Fig

.

22

.

The

directional

unit

minimum

pick

-

up

is

1

volt

and

2

amperes

at

its

maximum

torque

angle

for

the

0.5

to

2.5

ampere

and

the

2

to

6

ampere

range

relays

.

The

factory

adjustment

of

the

CO

unit

contacts

provides

a

contact

follow

.

Where

circuit

breaker

reclosing

will

be

initiated

immediately

after

a

trip

by

the

CO

contact

,

the

time

of

the

opening

of

the

contacts

should

be

a

minimum

.

This

condition

is

obtained

by

loosening

the

stationary

con

-

tact

mounting

screw

,

removing

the

contact

plate

and

then

replacing

the

plate

with

the

bent

end

resting

against

the

contact

spring

.

For

double

trip

relays

,

the

upper

stationary

contact

is

adjusted

such

that

the

contact

spring

rests

solidly

against

the

back

stop

.

The

lower

stationary

contact

is

then

ad

-

justed

such

that

both

stationary

contacts

make

contact

simultaneously

with

their

respective

moving

contact

.

B

.

Indicating

Contactor

Switch

(

ICS

)

Type

CRD

Relay

The

dual

polarized

type

relay

is

intended

for

ground

fault

protection

.

The

relay

can

be

polarized

from

a

potential

source

,

from

a

local

ground

source

,

or

from

both

simultaneously

.

The

type

CRD

relay

utilizes

the

directional

unit

of

the

type

CRC

relay

in

conjunction

with

the

direc

-

tional

unit

and

phase

shifting

mechanism

of

the

type

CRP

relay

.

The

directional

contacts

are

connected

in

parallel

to

torque

-

control

a

common

overcurrent

unit

.

See

Fig

.

8

.

The

only

setting

required

on

the

ICS

unit

is

the

selection

of

the

0.2

to

2.0

ampere

tap

setting

.

This

selection

is

made

by

connecting

the

lead

located

in

front

of

the

tap

block

to

the

desired

setting

by

means

of

the

connecting

screw

.

C

.

Indicating

Instantaneous

Trip

(

IIT

)

The

current

-

polarized

directional

unit

of

the

type

CRD

relay

onerates

on

residual

currents

while

the

potential

polarized

directional

unit

of

the

type

CRD

relay

operates

on

residual

voltage

and

residual

cur

-

rent

.

See

Fig

.

24

.

The

core

screw

must

be

adjusted

to

the

value

of

pick

-

up

desired

.

For

the

0.5

to

2.5

ampere

and

the

2

to

6

ampere

range

relays

,

the

minimum

pick

-

up

of

the

current

polarized

unit

is

0.5

ampere

in

each

winding

in

-

phase

and

the

minimum

pick

-

up

for

the

voltage

polarized

unit

is

1

volt

and

2

amperes

with

the

current

lagging

voltage

by

60

°

.

The

nameplate

data

will

furnish

the

actual

cur

-

rent

range

that

may

be

obtained

from

IIT

unit

.

D

.

Directional

Unit

(

D

)

SETTINGS

No

setting

is

required

.

A

.

Overcurrent

Unit

(

CO

)

INSTALLATION

The

overcurrent

unit

settings

can

be

defined

either

by

tap

settings

and

time

dial

position

or

by

tap

setting

and

a

specific

time

of

operation

at

some

current

multiple

of

the

tap

setting

(

e

.

g

.

4

tap

setting

,

2

time

dial

position

or

4

tap

setting

,

0.6

seconds

at

6

times

tap

value

current

)

.

To

provide

selective

circuit

breaker

operation

,

a

mini

-

mum

coordinating

time

of

0.3

seconds

plus

breaker

time

is

recommended

between

the

relay

being

set

and

the

relays

with

which

coordination

is

to

be

effected

.

The

relays

should

be

mounted

on

switchboard

panels

or

their

equivalent

in

a

location

free

from

dirt

,

moisture

,

excessive

vibration

and

heat

.

Mount

the

relay

vertically

by

means

of

the

two

mounting

studs

for

the

type

FT

projection

case

or

by

means

of

the

four

mounting

holes

on

the

flange

for

the

semi

-

flush

type

FT

case

.

Either

of

the

studs

or

the

mount

-

ing

screws

may

be

utilized

for

grounding

the

relay

.

The

electrical

connections

may

be

made

directly

to

the

terminals

by

means

of

screws

for

steel

panel

mounting

or

to

terminal

studs

furnished

with

the

relay

for

thick

panel

mounting

.

The

terminal

studs

may

be

easily

removed

or

inserted

by

locking

two

nuts

on

the

studs

and

then

turning

the

proper

nut

with

a

wrench

.

The

connector

screw

on

the

terminal

plate

above

the

time

dial

makes

connections

to

various

turns

on

the

oper

-

ating

coil

.

By

placing

the

screw

in

the

various

terminal

plate

holes

,

the

relay

will

respond

to

multiples

of

tap

value

currents

in

accordance

with

the

various

typical

time

-

current

curves

.

The

external

a

-

c

connections

of

the

directional

over

-

current

relays

are

shown

in

Figs

.

21

to

24

.

6

Courtesy of NationalSwitchgear.com

I

.

L

.

41

-

131

P

TYPES

CR

,

CRC

,

CRP

AND

CRD

RELAYS

INTERNAL

SCHEMATIC

INTERNAL

SCHEMATIC

r

!

I

DIRECTIONAL

UNIT

,

01

SECTIONAL

UNIT

.

-

.

1

INDICATING

CONTACTOR

SNITCH

<

3

>

J

I

INDICATING

CONTACTOR

SNITCH

.

INDUCTION

UNIT

INDUCTION

UNIT

d

=

11

T

*

I

IT

.

•

n

o

’

-

r

n

CO

:

^

X

-

HCS

Wfj

^

cs

4

INDICATING

INSTANTANEOUS

UNIT

u

INDICATING

'

INSTANTANEOUS

UNIT

I

IT

-

HI

-

RED

HANDLE

TEST

SNITCH

-

CURRENT

TEST

JACK

CHASSIS

OPERATED

'

SHORTING

SWITCH

-

TERMINAL

REO

HANDLE

TEST

SNITCH

-

CURRENT

TEST

JACK

CHASSIS

OPERATED

-

SHORTING

SWITCH

r

o

"

6

6.0

o

o

r

0

“

6

o

o

o

6

l

i

:

I

)

_

_

o

_

_

o

_

o

_

I

L

_

5

_

L

-

P

_

S

3

-

J

?

_

-

V

-

6

-

1

L

<

§

i

©

_

®

©

©©

©

©

©

*

©

7

X

9

)

*

8

2

6

)

,

V

-

TERMINAL

FRONT

VIEW

FRONT

VIEW

WITH

RELATIVE

INSTANTANEOUS

POLAR

]

TY

AS

SHOWN

THE

DIRECTIONAL

UNIT

CONTACTS

CLOSE

WITH

RELATIVE

INSTANTANEOUS

POLAR

;

TV

AS

SNOW

HE

DIRECTIONAL

UNIT

CONTACTS

CLOSE

Sub

5

57

D

4540

Sub

6

57

D

4520

Fig

.

9

.

Internal

Schematic

of

single

trip

directional

control

Fig

.

10

.

Internal

Schematic

of

single

trip

directional

con

-

relay

Type

CR

with

Indicating

Instantaneous

Trip

Unit

,

in

Type

FT

21

Case

•

trol

relay

Type

CRC

with

Indicating

instantaneous

Trip

Unit

,

in

Type

FT

21

Case

.

INTERNAL

SCHEMATIC

4

fC

°

-

INDICATING

A

-

C

CONTACTOR

SWITCH

-

*

©

DIRECTIONAL

UNIT

T

\

K

1

cir

nr

D

INDUCTION

UNIT

D

co

x

:

&

CO

INDICATING

INSTANTANEOUS

UNIT

ACS

1

'

9

"

9

_

"

_

9

"

^

"

_

<

5

”

"

o

"

.

RED

HANDLE

TEST

SWITCH

CURRENT

TEST

JACK

A

.

J

^

6

CHASSIS

OPERATED

SHORTING

SWITCH

9

)

+

7

8

TERMINAL

FRONT

VIEW

WITH

RELATIVE

INSTANTANEOUS

POLARITY

AS

SHOWN

THE

OIRECTIONAL

UNIT

CONTACTS

CLOSE

3507

A

69

Fig

.

10

A

.

Internal

Schemati

c

of

single

trip

directional

control

relay

Type

CR

with

Indicating

Instan

-

foneous

Trip

Unit

and

AC

Shunt

Trip

in

FT

21

Case

.

1

Courtesy of NationalSwitchgear.com

TYPES

CR

,

CRC

,

CRP

AND

CRD

RELAYS

ENERGY

REQUIREMENTS

CR

-

2

,

CRC

-

2

,

CRP

-

2

,

CRP

-

2

OVERCURRENT

UNITS

VOLT

AMPERES

tt

ONE

SECOND

RATING

t

(

AMPERES

)

POWER

FACTOR

ANGLER

CONTINUOUS

RATING

(

AMPERES

)

AT

3

TIMES

TAP

VALUE

TAP

VALUE

CURRENT

CURRENT

AT

AT

10

TIMES

TAP

VALUE

CURRENT

AT

20

TIMES

TAP

VALUE

CURRENT

AMPERE

RANGE

TAP

58

0.5

28

4.8

790

0.91

39.6

256

0.6

28

57

0.96

4.9

270

851

39.8

28

0.8

1.18

53

5.0

42.7

308

1024

0.5

/

2.5

28

50

5.3

1.0

1.37

45.4

348

1220

28

1.5

1.95

40

6.2

54.4

1740

435

28

36

7.2

65.4

2.0

2.24

580

2280

2850

28

29

7.9

2.5

2.50

73.6

700

59

110

5.04

262

2.0

3.1

38.7

800

5.13

2.5

110

55

39.8

920

4.0

280

110

51

5.37

3.0

4.4

312

42.8

1008

2

/

6

110

5.53

3.5

4.8

47

42.8

329

1120

110

45

5.72

4.0

5.2

360

46.0

1216

5.0

5.6

41

5.90

110

50.3

420

1500

6.0

37

6.54

6.0

110

54.9

474

1800

65

230

4.92

4.0

7.3

39.1

268

848

230

50

5.20

5.0

8.0

42.0

305

1020

8.8

230

47

5.34

6.0

330

44.1

1128

4

/

12

7.0

9.6

230

46

5.53

1260

45.8

364

230

8.0

10.4

43

5.86

49.9

1408

400

10.0

230

37

11.2

6.6

55.5

1720

470

12.0

12.0

230

34

7.00

62.3

528

2064

t

Thermal

capacities

for

short

times

other

than

one

second

may

be

calculated

on

the

basis

of

time

being

inversely

proportional

to

the

square

of

the

current

.

<

f

>

Degrees

current

lags

voltage

at

tap

value

current

.

Voltages

taken

with

Rectox

type

voltmeter

.

8

Courtesy of NationalSwitchgear.com

I

.

L

.

41

-

131

P

TYPES

CR

,

CRC

,

CRP

AND

CRD

RELAYS

ENERGY

REQUIREMENTS

CR

-

5

,

CRC

-

5

,

CRP

-

5

,

CRD

-

5

,

CR

-

6

,

CRC

-

6

,

CRP

-

6

,

CRD

-

6

OVERCURRENT

UNITS

VOLT

AMPEREStt

At

3

Times

At

10

Times

Tap

Value

Tap

Value

Tap

Value

Current

At

20

Times

Tap

Value

Current

One

Second

Power

Rating

t

Factor

(

Amperes

)

Angle

<

f

>

Current

Continuous

Rating

(

Amperes

)

At

Ampere

Range

Tap

Current

3.92

20.6

103

270

69

(

0.5

(

0.6

(

0.8

(

1.0

(

1.5

(

2.0

(

2.5

88

2.7

106

3.96

20.7

288

68

88

3.1

114

325

3.96

21

67

88

3.7

21.4

122

360

0.5

/

2.5

4.07

66

88

4.1

23.2

462

4.19

147

62

88

5.7

24.9

168

548

60

4.30

88

6.8

26.2

180

630

4.37

88

58

7.7

308

no

67

3.88

21

(

2

8

230

21.6

118

342

(

2.5

8.8

230

66

3.90

22.1

126

381

64

3.93

(

3

9.7

230

23.1

136

417

2

/

6

4.09

(

3.5

40.4

230

63

23.5

144

448

4.12

11.2

230

62

(

4

24.8

162

540

4.20

(

5

12.5

230

59

183

624

26.5

230

57

4.38

(

6

13.7

22.4

126

376

4.00

16

460

(

4

65

23.7

143

450

(

5

18.8

4.15

460

63

25.3

162

531

19.3

460

61

4.32

(

6

26.4

183

611

4

/

12

(

7

20.8

460

59

4.35

699

27.8

204

4.40

(

8

22.5

460

56

247

30.1

880

4.60

(

10

25

460

53

1056

35.6

288

4.92

(

12

28

460

47

CR

-

7

,

CRC

-

7

,

CRP

-

7

&

CRO

-

7

OVERCURRENT

UNITS

VOLT

AMPERES

ft

At

3

Times

At

10

Times

Tap

Value

Tap

Value

Tap

Value

Current

Current Current

At

20

Times

Tap

Value

Current

One

Second

Rating

t

(

Amperes

)

Power

Factor

Angle

<

f

>

At

Continuous

Rating

(

Amperes

)

Ampere

Range

Tap

278

103

20.7

3.88

68

88

(

0.5

(

0.6

(

0.8

0.5

/

2.5

(

1.0

(

1.5

.

(

2.0

(

2.5

2.7

288

107

20.9

3.93

67

88

3.1

320

114

21.1

3.93

66

88

3.7

122

356

21.6

4.00

88

64

4.1

459

148

22.9

4.08

61

88

5.7

174

552

24.8

4.24

88

58

6.8

640

185

25.9

4.38

88

56

7.7

306

21.3

111

66

4.06

230

(

2

8

342

21.8

120

230

4.07

63

(

2.5

8.8

366

22.5

129

4.14

230

63

9.7

(

3

141

413

23.4

4.34

2

/

6

(

3.5

230

62

10.4

448

149

23.8

61

4.34

230

11.2

(

4

163

530

25.2

4.40

230

59

(

5

12.5

183

624

27

4.62

230

58

(

6

13.7

129

392

22.8

4.24

16

460

64

(

4

460

149

24.2

4.30

61

460

(

5

18.8

168

540

25.9

4.62

4

/

12

(

6

460

60

19.3

626

187

27.3

4.69

20.8

460

58

(

7

688

29.8

211

4.80

460

55

(

8

22.5

860

260

33

5.20

460

(

10

25

51

1032

308

37.5

5.40

28

460

46

(

12

t

Thermal

capacities

for

short

times

other

than

one

second

may

be

calculated

on

the

basis

of

time

being

inversely

proportional

to

the

square

of

the

current

.

<

f

>

Degrees

current

lags

voltixge

at

tap

value

current

.

tt

Voltages

taken

with

Rectox

type

voltmeter

.

9

Courtesy of NationalSwitchgear.com

TYPES

CR

,

CRC

,

CRP

AND

CRD

RELAYS

ENERGY

REQUIREMENTS

CR

-

8

,

CRC

-

8

,

CRP

-

8

A

CRD

-

8

CR

-

9

,

CRC

-

9

,

CRP

.

9

&

CRP

-

9

OVERCURRENT

UNITS

tt

VOLT

AMPERES

Continuous

One

Second

Power

Rating Rating

t

Factor

Tap

Value

Tap

(

Amperes

)

(

Amperes

)

Angle

<

j

>

Current

At

3

Times

At

10

Times

Tap

Value

Current

At

20

Times

Tap

Value

Current

At

Ampere

Range

Tap

value

Current

(

0.5

C

0.6

(

0.8

0.5

/

2.5

(

1.0

(

1.5

(

2.0

(

2.5

88

350

72

21

132

2.7

2.38

88

21

365

3.1

71

2.38

134

88

3.7

69

142

400

2.40

21.1

88

4.1

67

440

2.42

21.2

150

88

5.7

530

62

2.51

22

170

88

6.8

675

2.65

23.5

200

57

7.7

88

53

24.8

228

800

2.74

(

2

8

230

70

360

2.38

21

136

8.8

230

(

2.5

66

21.1

395

2.40

142

9.7

(

3

230

430

64

2.42

21.5

149

10.4

230

2

/

6

62

2.48

470

(

3.5

22

157

(

4

11.2

230

500

60

22.7

164

2.53

12.5

230

580

(

5

24

180

58

2.64

660

(

6

13.7

230

198

56

2.75

25.2

16

420

(

4

460

68

2.38

21.3

146

480

(

5

18.8

460

63

2.46

21.8

158

(

6

19.3

460

550

2.54

22.6

172

60

4

/

12

(

7

20.8

460

620

57

2.62

23.6

190

22.5

700

(

8

460

24.8

207

2.73

54

(

10

25

850

460

3.00

27.8

248

48

28

1020

(

12

460

31.4

292

3.46

45

CR

-

11

,

CRC

-

11

CRP

-

11

&

CRD

-

ll

OVERCURRENT

UNITS

VOLT

AMPERES

tt

AT

20

TIMES

TAP

VALUE

CURRENT

CONTINUOUS

RATING

(

AMPERES

)

ONE

SECOND

POWER

RATING

t

FACTOR

TAP

VALUE

(

AMPERES

)

ANGLER

CURRENT

AT

3

TIMES

AT

10

TIMES

TAP

VALUE

TAP

VALUE

CURRENT

CURRENT

AT

AMPERE

RANGE

TAP

6.54

250

0.5

56

36

0.72

71.8

1.7

267

6.80

75.0

0.6

1.9

56

0.75

34

7.46

0.8

84.0

298

2.2

56

30

0.81

2.5

0.5

/

2.5

8.30

93.1

330

1.0

56

0.89

27

115.5

136.3

160.0

411

1.5

56

10.04

11.95

13.95

3.0

22

1.13

2.0

502

56

3.5

17

1.30

610

2.5

3.8

56

16

1.48

2.0

7.0

6.30

264

230

32

0.73

74.0

2.5

7.8

78.5

285

230

30

0.78

7.00

84.0

3.0

8.3

230

7.74

309

27

0.83

2

/

6

89.0

'

3.5

9.0

230

8.20

340

0.88

24

9.12

372

4.0

10.0

102.0

109.0

129.0

230

23

0.96

5.0

20

9.80

430

11.0

230

1.07

6.0

12.0

230

20

11.34

504

1.23

29

7.08

78.4

296

4.0

460

0.79

14

8.00

90.0

340

460

25

0.89

5.0

16

378

6.0

9.18

101.4

110.0

124.8

131.6

180.0

460

22

1.02

17

4

/

12

10.00

454

7.0

20

18

460

1.10

480

8.0

1.23

11.1

460

18

20

600

1.32

14.9

10.0

22

460

17

720

12.0

26

460

16

1.8

16.3

t

Thermal

capacities

for

short

times

other

than

one

second

may

be

calculated

on

the

basis

of

time

being

inversely

proportional

to

the

square

of

the

current

.

<

f

>

Degrees

current

lags

voltage

at

tap

value

current

.

tt

Voltages

taken

with

Rectox

type

voltmeter

,

10

Courtesy of NationalSwitchgear.com