ABB CR Series Manual

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

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Directional
Unit
•
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5
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/
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Contact
.
5
tat
/
onary
Contact
pressure
spring
.
3
-
Magnef
/
c
adjusting
plugs
,
4
-
Upper
bear
/
ng
screw
.
Mov
/
ng
element
assembly
.
6
-
Spr
/
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ad
faster
clamp
.
7
«
Currenf
8
/
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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
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SWITCH
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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
/
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UNIT
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CHASSIS
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SNITCH
RED
HANDLE
K
—
TEST
SNITCH
-
CURRENT
TEST
JACK
,
TERMINAL
•
ITU
RELATIVE
INSTANTANEOUS
POLARITY
AS
SHOWN
THE
01
RECTI
ORAL
UNIT
CONTACTS CLOSE
J
_
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A
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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