ABB CR Series User Manual

TYPES
CR
,
CRC
,
CRP
AND
CRD
RELAYS
PHASE
ROTATION
1
-
2
*
3
STATION
HUS
t
-
USE
DASHEO
CONNECTION
INSTEAD
Of
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FOR
RELAYS
WITH
0.5
-
2.5
AMPERE
RANGE
CO
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S
ANO
CO
-
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UNITS
.
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CR
RELAY
(
FRONT
Ylgo
)
1
2
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RELAY
CONTACT
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67
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AMMETER
SWITCH
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VOLTS
^
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CYC
.
2
SA
Pn
-
i
Pn
-
3
REUY
RELAY
52
Sub
2
182
A
873
m
25
/
5
ACT
I
1
2
3
1
YECTOR
>
ROTATION
POS
.
DC
TRIP
BUS
OR
—
NES
.
g
62
/
t
\
\
Fig
.
20
.
Diagram
of
test
connections
of
the
overcurrent
unit
.
n
REUT
10
VECTORS
AT
10
O
&
P
.
F
.
POWER
IN
TRIPPING
01
RECTI
ON
MAX
.
TORQUE
WHEN
I
LEADS
V
6
Y
APPROX
.
30
*
DEVICE
NUMBER
CHART
1
C
67
-
2
67
-
3
maintaining
of
this
current
accurately
is
necessary
because
of
the
steepness
of
the
slope
of
the
time
-
current
characteristic
(
Fig
.
19
)
.
A
1
%
variation
in
the
1.30
times
tap
value
current
(
including
measuring
instrument
deviation
)
will
change
the
nominal
opera
-
ting
time
by
approximately
4
%
.
5
TTJ
.
CS
y
?
I
t
67
-
DIRECTIONAL
OVERCURRENT
RELAY
-
TYPE
CR
52
-
POWER
CIRCUIT
BREAKER
ICS
-
INDICATING
CONTACTOR
SWITCH
A
-
BREAKER
AUXILIARY
CONTACT
TC
-
BREAKER
TRIP
COIL
52
TC
“
5
*
NEC
Sub
2
182
A
793
OR
POS
.
B
.
Indicating
Contactor
Switch
(
ICS
'
'
Fig
.
21
.
External
Schematic
of
the
type
CR
Relay
for
phase
fault
protection
.
Close
the
main
relay
contacts
and
pass
sufficient
d
-
c
current
through
the
trip
circuit
to
close
the
contacts
of
the
ICS
.
This
value
of
current
should
not
be
greater
than
the
particular
ICS
tap
setting
being
used
.
The
indicator
target
should
drop
freely
.
The
contact
gap
should
be
approximately
.
047
"
between
the
bridging
moving
contact
and
the
adjustable
stationary
contacts
.
The
bridging
moving
contact
should
touch
both
stationary
contacts
simultaneously
.
C
.
Indicating
Instantaneous
Trip
Unit
(
IIT
)
Routine
Maintenance
All
relays
should
be
inspected
and
checked
periodically
to
assure
proper
operation
.
Generally
a
visual
inspection
should
call
attention
to
any
noticeable
changes
.
A
mini
-
mum
suggested
check
on
the
relay
system
is
to
close
the
contacts
manually
to
assure
that
the
breaker
trips
and
the
target
drops
.
Then
release
the
contacts
and
observe
that
the
reset
is
smooth
and
positive
.
If
an
additional
time
check
is
desired
,
pass
secondary
current
through
the
relay
and
check
the
time
of
operation
.
It
is
preferable
to
make
this
at
several
times
pick
-
up
current
at
an
expected
operating
point
fox
the
particular
applica
-
tion
.
For
the
.
5
to
2.5
ampere
range
CO
-
5
and
CO
-
6
induc
-
tion
unit
use
the
alternative
test
circuit
in
Fig
.
20
as
these
relays
are
affected
by
a
distorted
wave
form
.
With
this
con
-
nection
the
25
/
5
ampere
current
transformers
should
be
worked
well
below
the
knee
of
the
saturation
(
i
.
e
.
,
use
10
L
50
or
better
)
.
All
contacts
should
be
periodically
cleaned
.
A
contact
burnisher
S
#
182
A
836
H
01
is
recommended
for
this
purpose
.
The
use
of
abrasive
material
for
cleaning
contacts
is
not
rec
-
ommended
,
because
of
the
danger
of
embedding
small
particles
in
the
face
of
the
soft
silver
and
thus
impairing
the
contact
.
The
core
screw
must
be
adjusted
to
the
value
of
pick
-
up
current
desired
.
The
nameplate
data
will
furnish
the
actual
current
range
that
may
be
obtained
from
IIT
unit
.
D
.
Directional
Unit
(
D
)
1
.
Contact
Gap
—
The
gap
between
the
stationary
contact
and
moving
contact
with
the
relay
in
a
de
-
energized
position
should
be
approximately
.
020
*
.
2
.
Sensitivity
—
The
respective
directional
units
should
trip
with
value
of
energization
and
phase
angle
relationships
as
indicated
in
Table
3
.
3
.
Spurious
Torque
Adjustments
—
There
should
be
no
spurious
closing
torques
when
the
operating
circuits
are
energized
per
Table
4
with
the
polar
-
izing
circuits
short
-
circuited
for
the
voltage
polar
-
ized
units
and
open
-
circuited
for
the
current
polar
-
ized
units
.
Calibration
Use
the
following
procedure
for
calibrating
the
relay
if
the
relay
has
been
taken
apart
for
repairs
or
the
adjust
-
ments
have
been
disturbed
.
This
procedure
should
not
be
20
Courtesy of NationalSwitchgear.com

ABB CR Series Specifications

General

Brand	ABB
Model	CR Series
Category	Relays
Language	English