ABB CIRCUIT SHIELD 87T - Page 6

IB
7.6
.
1.7
-
4
Page
6
Transformer
Differential
Relay
Specifications
Input
Circuits
:
Ratio
Matching
Taps
:
Continuous
rating
:
1
Second
rating
:
Burden
:
see
Table
1
.
see
Table
2
.
200
Amperes
,
any
tap
.
see
Table
3
.
Percentage
Restraint
Element
:
Minimum
operate
current
:
adjustable
13
-
65
*
of
tap
setting
.
Slope
:
adjustable
15
-
40
*
.
Refer
to
Figures
6
and
7
.
Instantaneous
Element
:
Internally
adjustable
8
-
20
x
tap
.
Factory
set
at
10
x
tap
.
Harmonic
Restraint
Element
:
Restrain
on
2
nd
harmonic
.
Internally
adjustable
approximately
10
*
-
20
*
.
Factory
setting
-
15
*
.
Operating
Time
:
See
Figure
5
.
Output
Contact
Rating
:
@
125
vdc
@
250
vdc
closing
/
tripping
continuous
break
30
A
30
A
5
A
5
A
0.3
A
0.1
A
Operating
Temperature
Range
:
-
20
to
+
70
°
C
models
available
for
125
vdc
@
0.05
A
max
.
drain
110
vdc
@
0.05
A
max
.
drain
250
vdc
@
0.05
A
max
.
drain
220
vdc
@
0.05
A
max
.
drain
48
vdc
@
0.05
A
max
.
drain
32
vdc
and
24
vdc
:
Control
Voltage
:
(
allowable
range
100
-
140
vdc
)
(
allowable
range
88
-
125
vdc
)
(
allowable
range
200
-
280
vdc
)
(
allowable
range
176
-
250
vdc
)
(
allowable
range
38
-
58
vdc
)
see
note
2
below
,
and
page
22
.
TABLE
4
:
CATALOG
NUMBERS
-
COMMON
.
UNITS
Control
Voltage
Catalog
Numbers
Std
Case
Test
Case
System
Freq
.
Type
Windings
87
T
48
vdc
11
Ovdc
125
vdc
250
vdc
Two
60
Hz
.
219
T
2431
219
T
2401
219
T
2441
219
T
2451
419
T
2431
419
T
2401
419
T
2441
419
T
2451
48
vdc
11
Ovdc
125
vdc
220
vdc
50
Hz
.
219
F
2431
219
F
2401
219
F
2441
219
F
2421
419
F
2431
419
F
2401
419
F
2441
419
F
2421
48
vdc
11
Ovdc
125
vdc
87
T
Three
60
Hz
.
219
T
3431
219
T
3401
219
T
3441
419
T
3431
419
T
3401
419
T
3441
50
Hz
.
48
vdc
11
Ovdc
125
vdc
219
F
3431
219
F
3401
219
F
3441
419
F
3431
419
F
3401
419
F
3441
Select
419
series
units
for
new
applications
due
to
the
the
improved
testing
features
.
Notes
:
1
.
2
.
Contact
factory
for
availability
of
units
for
control
voltage
ratings
not
listed
.
Type
96
dc
/
dc
inverter
and
48
vdc
rated
87
T
:
see
page
22
.
For
24
or
32
vdc
control
use
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