ABB Circuit Shield 87B User Manual

IB
7.6
.
1.7
-
7
Page
4
High
-
Impedance
Differential
Relays
TRIMMER
:
A
vernier
marked
pickup
inside
the
relay
on
the
upper
printed
circuit board allows fine
calibration
of
pickup
settings
at
selected switch
positions
.
4
.
Initial
Check
After
wiring
is
completed
and checked
,
apply
control
power
and
reset
the
operation
indicator
.
If
the
indicator
cannot
be
reset
,
recheck
connections
,
voltage
and
polarity
.
Do
not
attempt
any
other
tests
until
wiring
errors
are
corrected
.
Verify
ratio
of
current
transformers
.
Check
polarity
at
CT
'
s
and
connections
to
the
relays
.
Exercise
test
push
button
to
check
proper
operation
of
87
B
and lockout
relays
.
8.2
SO
209.33
1.197
6.562
166
-
69
6.873
174.63
30.16
t
500
12
-
7
RAMI L
C
.
2
.
\
4.673
123.63
3
1
J
T
2
-
437
61.91
I
a
O
SIOC
VIEW
FRONT
VICW
/
-
<
4
'
ins
0
'
*
HOLts
f
—
T
*
n
’
n
*
n
*
rrn
’
n
*
0
0
|
|
0 0 0 0 0
1
jL
&
tr
93.66
0
PANEL
CUTOUT
I
T
0 0
0
0
0
0 0
0
iui
hSS
*
32.36
-
L
-
>
0
•
4
HUH
•
3
•
2
I
II
i
i
1
STUD
NUM
8
CPS
(
BACK
VlCW
)
3.167
80.96
6.625
<
66
-
26
NOTE
l
DIMENSIONS
ARE
Relay
Outline
and
Drilling
Figure
1
:
CT
‘
S
vA
STATION
GROUND
CO NTROL
VO LTAGE
to
*
\
/
l
I
6
*
a
QS
-
O
^
-
O
4
(
-
>
(
+
)
G
o
„
o
„
OL
o
,
.
o
„
6
„
o
10
o
.
86
<
5
>
(
-
)
Figure
2
:
Basic
Relay
Connections
419
B
Series
Units
Courtesy of NationalSwitchgear.com

ABB Circuit Shield 87B Specifications

General

Brand	ABB
Model	Circuit Shield 87B
Category	Relays
Language	English