ABB CO User manual
Instruction
Leaflet
A
IIII
nm
»
ABB
Power
T
&
D
Company
Inc
.
Relay
Divisions
Coral
Springs
,
FL
33065
41
-
103
H
Type
CO
Circuit
Opening
Overcurrent
Relay
Effective
:
May
1984
Supersedes
I
.
L
41
-
103
G
,
Dated
June
1976
O
Denotes
Change
Since
Previous
Issue
CAUTION
ELECTROMAGNET
Before
putting
relays
into
service
,
remove
all
blocking
which
may
have
been
inserted
for
the
purpose
of
securing
the
parts
during
shipment
,
make
sure
that
all
moving
parts
operate
freely
,
inspect
the
contacts
to
see
that
they
are
clean
and
close
properly
,
and
operate
the
relay
to
check
the
settings
and
electrical
connections
.
The
electromagnets
for
the
types
CO
-
5
,
CO
-
6
,
CO
-
7
,
CO
-
8
and
CO
-
9
relays
have
a
main
tapped
coil
located
on
the
center
leg
of
an
“
E
"
type
laminated
structure
that
produces
a
flux
which
divides
and
returns
through
the
outer
legs
.
A
shading
coil
causes
the
flux
through
the
left
leg
to
lag
the
main
pole
flux
.
The
out
-
of
-
phase
fluxes
thus
produced
in
the
air
gap
cause
a
contact
closing
torque
.
APPLICATION
The
electromagnets
for
the
types
CO
-
2
and
CO
-
ll
relays
have
a
main
coil
consisting
of
a
tapped
primary
winding
and
a
secondary
winding
.
Two
identical
coils
on
the
outer
legs
of
the
lami
-
nation
structure
are
connected
to
the
main
coil
secondary
in
a
manner
so
that
the
combination
of
all
the
fluxes
produced
by
the
electromagnet
result
in
out
-
of
-
phase
fluxes
in
the
air
gap
.
The
out
-
of
-
phase
air
gap
fluxes
produced
cause
a
con
-
tact
closing
torque
.
These
induction
overcurrent
relays
are
used
to
disconnect
circuits
or
apparatus
when
the
current
in
them
exceeds
a
given
value
.
When
no
suitable
station
battery
is
available
,
the
circuit
opening
type
relay
in
conjunction
with
a
-
c
series
trip
coil
is
used
to
trip
the
circuit
breaker
.
CONTENTS
This
instruction
leaflet
applies
to
the
following
types
of
circuit
opening
relays
:
DE
-
ION
CONTACTOR
SWITCH
(
CS
)
Type
CO
-
2
Short
Time
Relay
Type
CO
-
5
Long
Time
Relay
Type
CO
-
6
Definite
Minimum
Time
Relay
Type
CO
-
7
Moderately
Inverse
Time
Relay
Type
CO
-
8
Inverse
Time
Relay
Type
CO
-
9
Very
Inverse
Time
Relay
Type
CO
-
l
1
Extremely
Inverse
Time
Relay
This
switch
is
a
small
a
-
c
solenoid
switch
whose
coil
is
energized
from
a
small
transformer
connected
in
the
main
current
circuit
.
A
cylin
-
drical
plunger
operates
a
spring
leaf
arm
with
a
silver
contact
surface
on
one
end
and
rigidly
fixed
to
the
frame
at
the
other
end
.
The
overcurrent
unit
contacts
are
in
the
con
-
tactor
switch
coil
circuit
and
when
they
close
,
the
solenoid
plunger
moves
upward
to
open
the
de
-
ion
contacts
which
normally
short
circuit
the
trip
coil
.
These
contacts
are
able
to
transfer
the
heavy
current
due
to
a
short
circuit
and
permit
this
cur
-
rent
to
energize
the
breaker
trip
coil
.
CONSTRUCTION
AND
OPERATION
The
type
CO
relays
consist
of
an
overcurrent
unit
(
CO
)
,
a
de
-
ion
contactor
switch
(
CS
)
.
an
op
-
eration
indicator
(
01
)
and
an
indicating
instan
-
taneous
trip
(
IIT
)
when
required
.
All
possible
contingencies
which
may
arise
during
installation
,
operation
or
maintenance
,
and
all
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
equipment
,
the
local
ABB
Power
T
&
D
Co
.
Inc
.
representative
should
be
contacted
.
Printed
in
U
.
S
.
A
.
Courtesy of NationalSwitchgear.com
I
.
L
.
41
-
103
H
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SCHEMATIC
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e
FROHT
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FHOHT
VIEW
Sub
2
183
A
055
Sub
3
183
AO
54
ROH
:
TERM
.
2
AMO
a
ARE
TO
RE
JUMPERED
AT
RELAY
CASE
ROTE
:
TERM
.
2
AMD
0
ARE
TO
RE
JUMPERED
AT
RELAY
CASE
Internal
Schematic
of
the
Circuit
Opening
Type
CO
Relay
,
with
Indicating
Instantaneous
Trip
,
in
Type
FT
-
21
Case
Fig
.
1
.
Internal
Schematic
of
the
Circuit
Opening
Type
CO
Relay
in
Type
FT
-
21
Case
Fig
.
2
.
OPERATION
INDICATOR
(
01
)
CHARACTERISTICS
The
operation
indicator
is
a
small
clapper
type
device
.
A
magnetic
armature
is
attracted
to
the
magnetic
core
upon
energization
of
the
switch
.
When
the
switch
closes
two
fingers
on
the
arma
-
ture
deflect
a
spring
located
on
the
front
of
the
switch
,
which
allows
the
operation
indicator
target
to
drop
.
The
relays
are
available
in
the
following
current
range
:
TAPS
RANGE
4
5
6
7
8
10
12
4
-
1 2
The
front
spring
,
in
addition
to
holding
the
target
,
provides
restraint
for
the
armature
and
thus
controls
the
pickup
value
of
the
switch
.
The
circuit
-
opening
relay
is
recommended
only
in
the
4
to
1
2
ampere
range
.
A
lower
range
is
not
desirable
because
the
burden
of
a
low
-
range
trip
coil
is
too
heavy
on
the
current
transformer
.
One
trip
coil
is
required
for
each
relay
.
INDICATING
INSTANTANEOUS
TRIP
UNIT
(
IIT
)
The
burden
of
the
auxiliary
current
trans
-
former
at
4
amps
,
is
4.6
VA
with
contacts
IIT
or
CO
closed
and
5.7
VA
with
contacts
open
.
The
instantaneous
trip
unit
is
a
small
a
-
c
oper
-
ated
clapper
type
device
.
A
magnetic
armature
,
to
which
leaf
-
spring
mounted
contacts
are
attached
,
is
attracted
to
the
magnetic
core
upon
energiza
-
tion
of
the
switch
.
When
the
switch
closes
,
the
moving
contacts
bridge
two
stationary
contacts
completing
the
trip
circuit
.
Also
,
during
the
op
-
eration
.
two
fingers
on
the
armature
deflect
a
spring
located
on
the
front
of
the
switch
which
allows
the
operation
indicator
target
to
drop
.
The
time
vs
.
current
characteristics
are
shown
in
Figs
.
3
to
9
.
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
.
A
core
screw
accessible
from
the
top
of
the
switch
provides
the
adjustable
pickup
range
.
2
Courtesy of NationalSwitchgear.com
I
.
L
.
41
-
103
H
ENERGY
REQUIREMENTS
TYPE
CO
-
2
RELAY
60
HERTZ
VOLT
AMPERES
*
*
(
XA
FOR
50
HZ
)
AT
3
TIMES
TAP
VALUE
CURRENT
(
A
=
0.88
)
AT
10
TIMES
TAP
VALUE
CURRENT
(
A
=
0.9
)
AT
AT
20
TIMES
TAP
VALUE
CURRENT
(
A
=
0.91
)
CONTINUOUS
RATING
TAP
(
AMPERES
)
ONE
SECOND
RATING
*
(
AMPERES
)
POWER
FACTOR
ANGLE
0
TAP
VALUE
CURRENT
(
A
=
0.86
)
Q
AMPERE
RANGE
58
39.6
256
760
0.5
0.91
28
4.8
0.6
57
39.8
270
851
0.96
28
4.9
53
5.0
42.7
0.8
1.18
28
308
1024
1220
1740
0.5
/
2.5
5.3
45.4
50
348
1.0
1.37
28
40
6.2
54.4
435
1.5
1.95
28
7.2
65.4
2.24
28
580
2.0
36
2280
2850
7.9
73.6
700
2.5
2.50
28
29
59
5.04
38.7
262
2.0
3.1
no
800
5.13
39.8
920
2.5
55
280
4.0
110
5.37
3.0
110
51
42.8
312
4.4
1008
2
/
6
3.5
5.53
4.8
110
42.8
47
329
1120
5.72
4.0
5.2
45
46.0
no
360
1216
5.90
50.3
5.0
5.6
41
420
1500
no
6.0
6.54
6.0
37
no
54.9
474
1800
65
4.92
4.0
7.3
230
39.1
268
848
5.0
5.20
8.0
50
42.0
305
230
1020
6.0
8.8
5.34
230
47
44.1
330
1128
4
/
12
7.0
9.6
5.35
45.8
1260
230
46
364
8.0
49.9
10.4
230
5.86
400
1408
43
10.0
11.2
230
37
55.5
470
1720
6.6
62.3
12.0
12.0
230
7.00
528
2064
34
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
.
Degrees
current
lags
voltage
at
tap
value
current
.
Voltages
taken
with
Rectox
type
voltmeter
.
•
*
3
Courtesy of NationalSwitchgear.com
I
.
L
.
41
-
103
H
ENERGY
REQUIREMENTS
CO
-
5
LONG
TIME
AND
CO
-
6
DEFINITE
MINIMUM
TIME
RELAYS
60
HERTZ
VOLT
AMPERES
*
*
(
XA
FOR
50
HZ
)
AT
10
TIMES
TAP
VALUE
CURRENT
(
A
=
0.9
)
AT
20
TIMES
TAP
VALUE
CURRENT
(
A
=
0.91
)
AT
3
TIMES
TAP
VALUE
CURRENT
(
A
=
0.88
)
AT
CONTINUOUS
RATING
TAP
(
AMPERES
)
ONE
SECOND
RATING
*
(
AMPERES
)
POWER
FACTOR
ANGLE
0
TAP
VALUE
CURRENT
(
A
=
0.86
)
Q
AMPERE
RANGE
69
(
0.5
20.6
88
3.92
103
270
2.7
(
0.6
68
88
3.96
20.7
106
3.1
288
(
0.8
67
3.7
88
21
3.96
114
325
0.5
/
2.5
(
1.0
66
4.07
21.4
88
122
4.1
360
0.5
62
88
4.19
23.2
147
5.7
462
(
2.0
60
24.9
4.30
168
88
548
6.8
(
2.5
58
88
4.37
26.2
180
7.7
630
230
(
2
67
21
3.88
8
110
308
230
(
2.5
66
21.6
8.8
3.87
118
342
230
(
3
64
9.7
22.1
3.93
126
381
230
2
/
6
(
3.5
63
10.4
23.1
4.09
136
417
230
(
4
62
11.2
23.5
4.08
144
448
230
(
5
59
12.5
4.20
24.8
162
540
230
(
6
57
13.7
26.5
4.38
183
624
460
(
4
16
65
4.00
22.4
126
376
460
(
5
63
18.8
23.7
4.15
143
450
460
(
6
19.3
61
4.32
25.3
162
531
4
/
12
460
(
7
20.8
59
4.35
26.4
183
611
460
(
8
22.5
56
27.8
4.40
4.60
204
699
460
GO
53
25
30.1
247
880
460
(
12
28
47
4.92
35.6
288
1056
CO
-
7
MODERATELY
INVERSE
TIME
RELAY
60
HERTZ
VOLT
AMPERES
*
*
(
XA
FOR
50
HZ
)
AT
3
TIMES
AT
10
TIMES
TAP
VALUE
TAP
VALUE
CURRENT
CURRENT
(
A
=
0.88
)
AT
20
TIMES
TAP
VALUE
CURRENT
(
A
=
0.91
)
AT
ONE
SECOND
RATING
*
(
AMPERES
)
POWER
FACTOR
ANGLE
0
TAP
VALUE
CURRENT
(
A
=
0.86
)
CONTINUOUS
RATING
(
AMPERES
)
O
AMPERE
RANGE
(
A
=
0.9
)
TAP
(
0.5
68
2.7
3.88
20.7
103
278
88
(
0.6
67
20.9
3.1
3.93
107
288
88
(
0.8
3.7
66
3.93
21.1
320
114
88
0.5
/
2.5
(
1.0
64
21.6
356
4.00
122
4.1
88
(
1.5
5.7
61
22.9
4.08
148
459
88
(
2.0
58
4.24
24.8
174
552
6.8
88
(
2.5
56
7.7
4.38
25.9
185
640
88
230
(
2
8
4.06
66
21.3
111
306
(
2.5
230
8.8
63
4.07
21.8
120
342
(
3
9.7
230
63
4.14
22.5
366
129
2
/
6
(
3.5
230
10.4
62
4.34
23.4
141
413
(
4
11.2
230
61
23.8
149
4.34
448
(
5
12.5
230
59
25.2
530
4.40
163
(
6
13.7
230
58
4.62
624
27
183
460
(
4
16
64
4.24
22.8
392
129
(
5
460
18.8
61
4.30
24.2
149
460
4
/
12
(
6
19.3
460
60
4.62
25.9
168
540
(
7
460
20.8
58
4.69
27.3
187
626
(
8
22.5
460
55
4.80
29.8
688
211
(
10
25
460
51
5.20
33
860
260
(
12
28
460
5.40
46
37.5
1032
308
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
.
*
Degrees
current
lags
voltage
at
tap
value
current
.
Voltages
taken
with
Rectox
type
voltmeter
.
*
*
4
Courtesy of NationalSwitchgear.com
I
.
L
.
41
-
103
H
ENERGY
REQUIREMENTS
CO
-
8
INVERSE
TIME
AND
CO
-
9
VERY
INVERSE
TIME
RELAYS
60
HERTZ
VOLT
AMPERES
*
*
(
XA
FOR
50
HZ
)
AT
20
TIMES
TAP
VALUE
CURRENT
(
A
=
0.91
)
AT
10
TIMES
TAP
VALUE
CURRENT
(
A
=
0.9
)
AT
3
TIMES
TAP
VALUE
CURRENT
(
A
=
0.88
)
AT
CONTINUOUS
RATING
TAP
(
AMPERES
)
ONE
SECOND
RATING
*
(
AMPERES
)
POWER
FACTOR
ANGLE
0
TAP
VALUE
CURRENT
(
A
=
0.86
)
Q
AMPERE
RANGE
2.38
350
72
21
132
88
(
0.5
2.7
71
2.38
365
88
21
134
(
0.6
3.1
2.40
69
142
400
88
21.1
(
0.8
3.7
2.42
0.5
/
2.5
88
67
150
440
21.2
4.1
(
1.0
2.51
62
530
22
170
(
1.5
88
5.7
2.65
88
57
23.5
200
675
6.8
(
2.0
2.74
53
24.8
800
228
88
(
2.5
7.7
2.38
70
136
360
21
230
(
2
8
2.40
66
21.1
142
395
230
(
2.5
8.8
2.42
64
430
230
149
9.7
(
3
21.5
62
2.48
470
157
2
/
6
230
22
(
3.5
10.4
2.53
60
500
230
22.7
164
11.2
(
4
2.64
58
580
12.5
230
24
180
(
5
2.75
56
198
660
230
25.2
(
6
13.7
2.38
68
21.3
146
420
16
460
(
4
2.46
63
21.8
158
480
(
5
460
18.8
2.54
60
172
550
460
22.6
(
6
19.3
2.62
4
/
12
57
190
620
460
23.6
(
7
20.8
2.73
700
54
207
22.5
460
24.8
(
8
3.00
248
850
460
48
27.8
25
(
10
45
3.46
292
1020
460
(
12
28
31.4
TYPE
CO
-
11
RELAY
60
HERTZ
VOLT
AMPERES
**
(
XA
FOR
50
HZ
)
AT
20
TIMES
TAP
VALUE
CURRENT
(
A
=
0.91
)
AT
3
TIMES
AT
10
TIMES
TAP
VALUE
TAP
VALUE
CURRENT
(
A
=
0.9
)
AT
POWER
FACTOR
ANGLE
o
TAP
VALUE
CURRENT
(
A
=
0.86
)
CONTINUOUS
RATING
(
AMPERES
)
ONE
SECOND
RATING
*
(
AMPERES
)
Q
AMPERE
RANGE
CURRENT
(
A
=
0.88
)
TAP
250
0.5
1.7
56
36
0.72
6.54
71.8
56
34
75.0
267
0.6
1.9
0.75
6.80
56
298
0.8
2.2
30
0.81
7.46
84.0
0.5
/
2.5
1.0
3.5
56
27
8.30
330
0.89
93.1
56
22
411
1.5
3.0
1.13
10.04
11.95
13.95
115.5
136.3
160.0
2.0
56
502
17
3.5
1.30
3.8
56
2.5
16
610
1.48
7.0
230
2.0
32
0.73
6.30
264
74.0
7.8
2.5
230
30
78.5
285
0.78
7.00
8.3
230
3.0
27
309
0.83
7.74
84.0
9.0
230
3.5
24
89.0
340
2
/
6
0.88
8.20
10.0
230
4.0
23
372
0.96
9.12
102.0
109.0
129.0
5.0
11.0
230
20
9.80
430
1.07
230
20
6.0
12.0
1.23
11.34
504
460
29
0.79
4.0
14
7.08
78.4
296
460
25
5.0
16
0.89
8.00
90.0
340
460
22
378
6.0
17
1.02
101.4
110.0
124.8
131.6
180.0
9.18
20
7.0
18
460
4
/
12
1.10
10.00
454
8.0
20
460
18
1.23
480
11.1
22
460
17
600
1.32
14.9
10.0
26
460
16
720
1.8
16.3
12.0
*
Thermal
capac
ities
for
short
times
other
than
one
second
may
be
calaculated
on
the
basis
of
time
being
inversely
proportional
to
the
square
of
the
current
.
if
.
Degrees
current
lags
voltage
at
tap
value
current
.
*
*
Voltages
taken
with
Hectox
type
voltnte
ter
.
5
Courtesy of NationalSwitchgear.com
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
)
{
MEN
AUK
.
(
RELAT
CONTACT
(
OPENS
r
°
L
cP
f
O
O
r
.
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r
TO
TIMER
uC
_
o
o
c
o
i
©
.
<
&
.
©
_
©
]
(
L
©
©©
C
8
)
®
i
STOP
)
)
TO
(
TIMER
STARTS
?
TIMER
(
VHEN
SWITCH
)
START
(
“
S
'
CLOSES
)
AUK
.
RELAY
r
-
J
52
-
2
rc
b
‘
H
O
(
oi
)
—
^
T
V
cs
H
PH
.
2
^
RESISTANCE
LOAD
SNITCH
AMIETER
•
S
’
V
120
VOLTS
W
CYC
.
52
-
3
PH
.
3
A
^
A
/
c
si
Q
-
oi
,
H
2
Sc
/
/
?
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
I
.
L
.
41
-
103
H
OPERATION
INDICATOR
(
01
)
contact
to
a
position
where
the
stationary
contact
is
resting
against
its
backstop
.
The
index
mark
located
on
the
movement
frame
should
coincide
with
the
“
O
”
mark
on
the
time
dial
.
No
setting
is
required
on
this
unit
.
INDICATING
INSTANTANEOUS
TRIP
(
IIT
)
The
core
screw
must
be
adjusted
to
the
value
of
pick
-
up
current
desired
.
b
)
For
relays
identified
with
a
“
T
”
,
located
at
lower
left
of
stationary
contact
block
,
the
index
mark
on
the
movement
frame
will
coincide
with
the
“
O
”
mark
on
the
time
dial
when
the
stationary
contact
has
moved
through
approximately
one
-
half
of
its
normal
deflection
.
Therefore
,
with
the
stationary
contact
resting
against
the
backstop
,
the
in
-
dex
mark
is
offset
to
the
right
of
the
“
O
”
mark
by
approximately
.
020
,
/
.
The
place
-
ment
of
the
various
time
dial
positions
in
line
with
the
index
mark
will
give
operating
times
as
shown
on
the
respective
time
-
current
curves
.
The
nameplate
data
will
furnish
the
actual
cur
-
rent
range
that
may
be
obtained
from
the
IIT
unit
.
INSTALLATION
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
mounting
stud
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
the
stud
or
the
mounting
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
the
terminal
stud
furnished
with
the
relay
for
thick
panel
mounting
.
The
terminal
stud
may
be
easily
removed
or
inserted
by
locking
two
nuts
on
the
stud
and
then
turning
the
proper
nut
with
a
wrench
.
For
type
CO
-
1
1
relay
only
,
the
1.30
times
tap
value
operating
time
from
the
number
6
time
dial
Q
position
is
53.5
±
5
%
seconds
and
should
be
checked
first
.
It
is
important
that
the
1.30
times
tap
value
current
be
maintained
accurately
.
The
maintaining
of
this
current
accurately
is
necessary
because
of
the
steepness
of
the
slope
of
the
time
-
current
characteristic
(
Fig
.
9
)
.
A
slight
variation
,
±
1
%
,
in
the
1.30
times
tap
value
current
(
includ
-
ing
measuring
instrument
deviation
)
will
change
©
the
timing
tolerance
to
±
10
%
and
the
effects
of
different
taps
can
make
the
total
variations
appear
to
the
±
15
%
.
For
detail
information
on
the
FT
case
refer
to
I
.
L
.
41
-
076
.
ADJUSTMENTS
AND
MAINTENANCE
2
.
Minimum
Trip
Current
Set
the
time
dial
to
position
6
.
Alternately
apply
tap
value
current
plus
3
%
and
tap
value
cur
-
rent
minus
3
%
.
The
moving
contact
should
leave
the
backstop
at
tap
value
current
plus
3
%
and
should
return
to
the
backstop
at
tap
value
current
minus
3
%
.
The
proper
adjustments
to
insure
correct
oper
-
ation
of
this
relay
have
been
made
at
the
factory
.
Upon
receipt
of
the
relay
no
customer
adjust
-
ments
,
other
than
those
covered
under
“
SET
-
TINGS
”
should
be
required
.
O
PERFORMANCE
CHECK
3
.
Time
Curve
The
following
check
is
recommended
to
insure
that
the
relay
is
in
proper
working
order
:
Table
I
shows
the
time
curve
calibration
points
for
the
various
types
of
relays
.
With
the
time
dial
set
to
the
indicated
position
,
apply
the
currents
specified
by
Table
I
,
(
e
.
g
.
,
for
the
CO
-
2
,
3
and
20
times
tap
value
current
)
and
measure
the
operat
-
ing
time
of
the
relay
.
The
operating
times
should
equal
those
of
Table
I
plus
or
minus
5
percent
.
1
.
Contacts
a
)
By
turning
the
time
dial
,
move
the
moving
contacts
until
they
deflect
the
stationary
14
Courtesy of NationalSwitchgear.com
I
.
L
.
41
-
103
H
CO
UNIT
4
.
De
-
ion
Contactor
Switch
(
CS
)
1
.
Contacts
The
de
-
ion
contactor
switch
should
operate
with
a
minimum
of
4
amperes
a
-
c
applied
.
By
turning
the
time
dial
,
move
the
moving
contacts
until
they
deflect
the
stationary
contact
to
a
position
where
the
stationary
contact
is
resting
against
its
backstop
.
The
index
mark
located
on
the
movement
frame
should
coincide
with
the
“
O
”
mark
on
the
time
dial
.
a
)
5
.
Operation
Indicator
(
01
)
The
operation
indicator
should
operate
with
a
minimum
of
3
amperes
a
-
c
applied
.
The
operation
indicator
target
should
drop
freely
.
6
.
Indicating
Instantaneous
Trip
Unit
(
IIT
)
For
relays
identified
with
a
UT
”
,
located
at
lower
left
of
stationary
contact
block
,
the
index
mark
on
the
movement
frame
will
coin
-
cide
with
the
"
O
”
mark
on
the
time
dial
when
the
stationary
contact
has
moved
through
approximately
one
-
half
of
its
normal
deflec
-
tion
.
Therefore
,
with
the
stationary
contact
resting
against
the
backstop
,
the
index
mark
is
offset
to
the
right
of
the
"
O
”
mark
by
ap
-
proximately
.
020
"
.
The
placement
of
the
various
time
dial
positions
in
line
with
the
index
mark
will
give
operating
times
as
shown
on
the
respective
time
-
current
curves
.
b
)
The
core
screw
which
is
adjustable
from
the
top
of
the
trip
unit
determines
the
pickup
value
.
The
trip
unit
has
a
nominal
ratio
of
adjustment
of
1
to
4
and
an
accuracy
within
the
limits
of
10
%
.
The
making
of
the
contacts
and
target
indica
-
tion
should
occur
at
approximately
the
same
in
-
stant
.
The
stationary
contact
should
have
a
mini
-
mum
of
1
/
32
"
wipe
.
The
bridging
moving
contact
should
touch
both
stationary
contacts
simul
-
taneously
.
2
.
Minimum
Trip
Current
ROUTINE
MAINTENANCE
The
adjustment
of
the
spring
tension
in
setting
the
minimum
trip
current
value
of
the
relay
is
most
conveniently
made
with
the
damping
mag
-
net
removed
.
All
relays
should
be
inspected
periodically
and
the
time
of
operation
should
be
checked
at
least
once
every
year
or
at
such
other
time
intervals
as
may
be
dictated
by
experience
to
be
suitable
to
the
particular
application
.
Phantom
loads
should
not
be
used
in
testing
induction
-
type
re
-
lays
because
of
the
resulting
distorted
current
wave
form
which
produces
an
error
in
timing
.
With
the
time
dial
set
on
"
O
”
,
wind
up
the
spiral
spring
by
means
of
the
spring
adjuster
until
approximately
6
-
3
/
4
convolutions
show
.
Set
the
relay
on
the
minimum
tap
setting
,
the
time
dial
to
position
6
.
All
contacts
should
be
periodically
cleaned
.
A
contact
burnisher
No
.
182
A
836
H
01
is
recom
-
mended
for
this
purpose
.
The
use
of
abrasive
material
for
cleaning
contacts
is
not
recom
-
mended
,
because
of
the
danger
of
embedding
small
particles
in
the
face
of
the
soft
silver
and
thus
impairing
the
contact
.
Adjust
the
control
spring
tension
so
that
the
moving
contact
will
leave
the
backstop
at
tap
value
current
+
1.0
%
and
will
return
to
the
back
-
stop
at
tap
value
current
-
1.0
%
.
3
.
Time
Curve
Calibration
CALIBRATION
Install
the
permanent
magnet
.
Use
of
the
following
procedure
for
calibrating
the
relay
if
the
relay
has
been
taken
apart
for
repairs
or
the
adjustments
disturbed
.
This
pro
-
cedure
should
not
be
used
until
it
is
apparent
that
the
relay
is
not
in
proper
working
order
.
(
See
O
"
Performance
Check
”
.
)
Apply
the
indicated
current
per
Table
1
for
per
-
manent
magnet
adjustment
(
e
.
g
.
CO
-
8
,
2
times
tap
value
)
and
measure
the
operating
time
.
Adjust
the
permanent
magnet
keeper
until
the
operating
time
corresponds
to
the
value
of
Table
I
.
15
Courtesy of NationalSwitchgear.com
I
.
L
.
41
-
103
H
Apply
the
indicated
current
per
Table
I
for
the
electromagnet
plug
adjustment
(
e
.
g
.
CO
-
8
,
20
times
tap
value
)
and
measure
the
operating
time
.
Adjust
the
proper
plug
until
the
operating
time
corresponds
to
the
value
in
Table
I
.
(
Withdrawing
the
left
hand
plug
,
front
view
,
increases
the
oper
-
ating
time
and
withdrawing
the
right
hand
plug
,
front
view
,
decreases
the
time
.
)
In
adjusting
the
plugs
,
one
plug
should
be
screwed
in
completely
and
the
other
plug
run
in
or
out
until
the
proper
operating
time
has
been
obtained
.
tact
gap
spacing
to
slightly
less
than
1
/
16
of
an
inch
.
Bend
down
the
contact
springs
so
that
a
firm
contact
is
made
but
not
so
strong
that
the
minimum
pick
-
up
value
cannot
be
obtained
.
The
spring
tension
should
be
about
1
5
grams
.
Hold
the
relay
contacts
closed
and
with
an
auxiliary
relay
coil
connected
across
terminals
to
simulate
the
circuit
breaker
trip
coil
,
note
that
the
contactor
switch
picks
up
on
less
than
4
amperes
.
For
type
CO
-
11
relay
only
,
the
1.30
times
tap
value
operating
time
from
the
number
6
time
dial
Q
position
is
53.5
±
5
%
seconds
.
It
is
important
that
the
1.30
times
tap
value
current
be
maintained
accurately
.
The
maintaining
of
this
current
ac
-
curately
is
necessary
because
of
the
steepness
of
the
slope
of
the
time
-
current
characteristic
O
(
Fig
.
9
)
.
A
slight
variation
,
±
1
%
,
in
the
1.30
times
tap
value
current
(
including
measuring
instrument
deviation
)
will
change
the
timing
tolerance
to
±
10
%
and
the
effect
of
different
taps
can
make
the
total
variations
appear
to
be
±
15
%
.
If
the
operating
time
at
1.3
times
tap
value
is
not
within
these
limits
,
a
minor
adjustment
of
the
control
spring
will
give
the
correct
operating
time
without
any
undue
effect
on
the
minimum
pick
-
up
of
the
relay
.
This
check
is
to
be
made
after
the
2
times
tap
value
adjustment
has
been
completed
.
5
.
Operation
Indicator
(
OI
)
Pass
sufficient
current
(
a
-
c
)
through
the
opera
-
tion
indicator
to
just
operate
it
.
This
value
of
current
should
not
be
greater
than
3
amperes
.
The
operation
indicator
target
should
drop
freely
.
To
change
pickup
,
adjust
the
core
screw
.
6
.
Indicating
Instantaneous
Trip
Unit
(
IIT
)
The
making
of
the
contacts
and
target
indica
-
tion
should
occur
at
approximately
the
same
instant
.
Position
the
stationary
contact
for
a
mini
-
mum
of
1
/
32
"
wipe
.
The
bridging
moving
contact
should
touch
both
stationary
contacts
simul
-
taneously
.
Apply
sufficient
current
to
operate
the
IIT
.
The
operation
indicator
target
should
drop
freely
.
Recheck
the
permanent
magnet
adjustment
.
If
the
operating
time
for
this
calibration
point
has
changed
,
readjust
the
permanent
magnet
and
then
recheck
the
electromagnet
plug
adjustment
.
The
nameplate
data
will
furnish
the
actual
cur
-
rent
range
that
may
be
obtained
from
the
IIT
unit
.
RENEWAL
PARTS
4
.
De
-
ion
Contactor
Switch
(
CS
)
Repair
work
can
be
done
most
satisfactorily
at
the
factory
.
However
,
interchangeable
parts
can
be
furnished
to
the
customers
who
are
equipped
for
doing
repair
work
.
When
ordering
parts
,
always
give
,
the
complete
nameplate
data
.
Adjust
the
core
stop
on
the
top
as
high
as
pos
-
sible
without
allowing
the
insulating
bushing
at
the
bottom
of
the
plunger
to
touch
the
Micarta
angle
.
The
contact
will
be
separated
from
the
Micarta
angle
by
1
/
32
"
to
1
/
16
"
.
Adjust
the
con
-
16
Courtesy of NationalSwitchgear.com
I
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L
.
41
-
103
H
TABLE
I
TIME
CURVE
CALIBRATION
DATA
-
50
AND
60
HERTZ
Electromagnet
Plugs
Permanent
Magnet
Adjustment
Operating
Time
Seconds
Operating
Time
Seconds
Current
(
Multiples
of
Tap
Value
)
Time
Dial
Position
Current
(
Multiples
of
Tap
Value
)
Relay
Type
0.22
20
6
3
0.57
CO
-
2
14.30
10
CO
-
5
6
2
37.80
1.19
20
CO
-
6
6
9
2.46
1.1
1
4.27
20
CO
-
7
6
i
1.1
1
CO
-
8
6
13.35
20
2
0.65
CO
-
9
20
2
8.87
6
0.24
A
11.27
20
CO
-
11
6
2
A
For
50
hertz
CO
-
11
relay
20
times
operating
time
limits
are
0.24
+
10
%
,
-
5
%
.
17
Courtesy of NationalSwitchgear.com
I
.
L
.
41
-
103
H
.
563
.
250
(
14.30
)
DIA
.
4
HOLES
FOR
.
190
-
32
MTG
.
SCREWS
5.563
-
»
(
141.30
)
(
6.35
)
H
-
6.063
*
|
(
I
54.00
)
1.594
(
40.49
)
2.781
(
70.64
)
A
.
T
t
j
L
5.219
(
132.56
)
9.063
3
(
230.188
)
9.688
(
246.06
)
4
•
t
4
*
4
<
L
4
,
531
(
115.09
)
4.844
(
123.04
)
10.438
(
265.13
)
1
1
'
1
.
125
l
-
2.938
(
74.63
)
R
.
3.188
(
80.98
)
(
3.18
)
h
-
5.875
(
149.23
)
6.375
(
161.93
)
PANEL
LOCATION
SEMI
-
FLUSH
MTG
.
PROJECTION
MTG
.
DIMENSIONS
IN
INCHES
K
DIMENSIONS
IN
MM
.
\
X
/
LARGE
INTERNAL
\
/
\
a
EXTERNAL
\
/
TOOTH
WASHER
\
-
SMALL
EXTERNAL
TOOTHED
WASHERS
.
PANEL
CUTOUT
S
DRILLING
FOR
SEMI
-
FLUSH
MTG
t
1.344
(
34.14
)
2.688
(
68.2
8
)
-
±
.
563
£
(
14.30
)
DIA
.
2
HOLES
_
5.375
(
136.53
)
4
-
f
.
OI
6
(
.
397
)
.
250
n
(
6.35
)
“
°
t
—
1.031
-
4
-
1.031
—
1.031
-
f
1.031
-
H
(
26.19
)
(
26.19
)
(
26.19
)
(
26.19
)
'
1
.
190
-
32
SCREW
.
375
1
,
344
SPACERS
FOR
(
34.14
)
THIN
PANELS
(
9.53
)
R
PANEL
CASE
^
,
5
/
16
-
18
SCREW
~
^
Q
7
~
/
(
FOR
THICK
PANELS
09
)
/
USE
5
/
16
-
18
STUDS
)
1
T
A
1.0
/
(
25.4
)
7
)
I
3
5
\
n
3
-
i
9
INTERNAL
-
EXTERNAL
TOOTHED
WASHERS
|
8
|
3
(
46.05
)
i
2.0
i
i
.
190
-
32
SCREW
FOR
THICK
PANELS
USE
.
190
-
32
STUDS
(
50.8
)
Wr
2
10
V
4
6
e
i
v
Ifr
—
.
516
(
13
.
11
)
-
1.031
-
f
1.031
—
f
—
1.031
-
41.031
-
»
(
26.19
)
(
26.19
)
(
26.19
)
(
26.19
)
PANEL
DRILLING
OR
CUTOUT
FOR
PROJECTION
MTG
.
(
FRONT
VIEW
)
.
750
TERMINAL
NUMBER
DIA
.
(
19.05
)
10
HOLES
OR
CUTOUT
i
]
.
641
TERMINAL
AND
MOUNTING
DETAILS
DIA
;
(
16.28
)
57
D
7901
Fig
,
12
.
Outline
and
Drilling
Plan
for
the
Circuit
Opening
CO
Relay
in
the
Type
FT
-
21
Case
18
Courtesy of NationalSwitchgear.com
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