ABB CR Series User 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

ABB CR Series Specifications

General

Contact Configuration	SPDT, DPDT
Operating Temperature	-40...70 °C
Insulation Resistance	1000 MΩ
Electrical Life	100 x 10^3 operations at rated load
Coil Voltage	5 VDC, 6 VDC, 12 VDC, 24 VDC, 48 VDC, 60 VDC, 110 VDC, 24 VAC, 48 VAC, 115 VAC, 120 VAC, 230 VAC, 240 VAC
Contact Rating	6 A / 250 VAC, 6 A / 30 VDC

Summary

Application of Directional Overcurrent Relays

Relay Type Overview

Describes CR, CRC, CRP, and CRD relay functions and selection criteria.

Construction and Operation

Overcurrent Unit (CO)

Explains the induction principle and torque generation in the CO unit.

Indicating Contactor Switch (ICS)

Describes the d-c operated clapper type ICS unit.

Indicating Instantaneous Trip Unit (IIT)

Details the a-c operated clapper type IIT unit.

Directional Unit (D)

Explains the directional unit's mechanical and electrical operation.

Relay Characteristics and Specifications

Time Curve Designations

Refers to Table I for time characteristic designations.

Trip Circuit Constants

Provides constants for the indicating contactor switch.

Specific Relay Type Functions

Details CR, CRC, CRP, and CRD relay functions and pickup values.

Settings, Calibration, and Installation

Overcurrent Unit (CO) Settings

Explains how to set the overcurrent unit parameters.

Indicating Contactor Switch (ICS) Settings

Describes the ICS tap selection setting.

Indicating Instantaneous Trip (IIT) Settings

Details adjusting the core screw for pickup value.

Directional Unit (D) Settings

Notes that no setting is required for the directional unit.

Installation Procedures

Provides instructions for mounting and wiring the relays.