ABB CO User Manual

I
.
L
.
41
-
103
H
STAT
10
«
BuB
1
CO
RELAY
(
FNONT
VIEW
)
2
3
3
01
52
S
l
>
co
I
-
4
-
(
TIMER
STOPS
)
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AUK
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CONTACT
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TO
(
TIMER
STARTS
?
TIMER
(
VHEN
SWITCH
)
START
(
“
S
'
CLOSES
)
AUK
.
RELAY
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-
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-
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RESISTANCE
LOAD
SNITCH
AMIETER
•
S
’
V
120
VOLTS
W
CYC
.
52
-
3
PH
.
3
A
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7
183
A
214
Fig
.
10
.
Diagram
of
Test
Connections
for
the
Circuit
Opening
CO
Relay
in
the
Type
FT
-
21
Case
1
2
3
DEVICE
NUMBER
CHART
51
*
QVERCURRENT
RELAT
.
TYPE
CO
CS
“
DE
-
ION
CONTACTOR
SWITCH
IN
TYPE
CO
RELAY
01
-
OPERATION
INDICATOR
IN
TYPE
CO
RELAY
52
*
POWER
CIRCUIT
BREAKER
TC
-
BREAKER
TRIP
COIL
SETTINGS
CO
UNIT
Sub
1
183
A
213
The
overcurrent
unit
settings
can
be
defined
either
by
tap
setting
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
)
.
Fig
.
11
.
ExternaI
Schematic
of
the
Circuit
Opening
Type
CO
Relay
for
Phase
Overcurrent
Protection
on
a
Three
Phase
System
Chassis
operating
shorting
switches
on
the
case
will
short
the
secondary
of
the
current
trans
-
former
.
The
taps
should
then
be
changed
with
the
relay
outside
of
the
case
and
then
re
-
inserted
into
the
case
.
To
provide
selective
circuit
breaker
operation
,
a
minimum
coordinating
time
of
0.3
seconds
plus
circuit
breaker
time
is
recommended
between
the
relay
being
set
and
the
relays
with
which
coordi
-
nation
is
to
be
effected
.
INSTANTANEOUS
RECLOSING
The
connector
screw
on
the
terminal
plate
above
the
time
dial
makes
connections
to
various
turns
on
the
operating
coil
.
By
placing
this
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
factory
adjustment
of
the
CO
unit
contact
provides
a
contact
follow
.
Where
instantaneous
circuit
breaker
reclosing
will
be
initiated
upon
the
closure
of
the
CO
contact
,
this
contact
follow
must
be
eliminated
by
loosening
the
stationary
contact
mounting
screw
,
removing
the
contact
plate
and
then
replacing
the
plate
with
the
bent
end
resting
against
the
contact
spring
.
With
this
change
and
the
contact
mounting
screw
tightened
,
the
stationary
contact
will
rest
solidly
against
its
backstop
.
CAUTION
Since
the
tap
block
connector
screw
carries
oper
-
ating
current
,
be
sure
that
the
screw
is
turned
tight
.
IN
ORDER
TO
AVOID
OPENING
CUR
-
RENT
TRANSFORMER
CIRCUITS
WHEN
CHANGING
TAPS
UNDER
LOAD
,
THE
RELAY
MUST
BE
FIRST
REMOVED
FROM
THE
CASE
.
O
DE
-
ION
CONTACTOR
SWITCH
(
CS
)
No
setting
is
required
on
this
unit
.
13
Courtesy of NationalSwitchgear.com

ABB CO Specifications

General

Brand	ABB
Model	CO
Category	Relays
Language	English