9171300990 Rev R
BE1-87T Test Procedures
5-15
Step 9.
Three-Phase Units Only:
Repeat Steps 6, 7 and 8 for phases B and C. (Refer to Figures 5-2
through 5-5, as appropriate, for the terminal numbers of the phase B and C inputs of the relay
under test.)
Table 5-5. Restraint Pickup Test: 1 A, 50 or 60 Hz
Input 1, Tap = 2.0
Input 2, Tap = 3.8
Increasing Input 1
Decreasing Input 2
% Slope
Amperes
X Tap Amperes
X Tap
Trip Amperes
Trip Amperes
15
0.4
1
0.76
1
0.540 ±0.052
0.494 ± 0.050
15
0.8
2
1.52
2
0.941 ±0.076
1.254 ± 0.095
15
1.2
3
2.28
3
1.412 ±0.105
1.938 ± 0.136
15
2.0
5
3.8
5
2.353 ±0.161
3.230 ± 0.214
25
0.4
1
0.76
1
0.540 ±0.052
0.494 ± 0.050
25
0.8
2
1.52
2
1.067 ±0.084
1.140 ± 0.088
25
1.2
3
2.28
3
1.600 ±0.116
1.710 ± 0.123
25
2.0
5
3.8
5
2.667 ± 0.180
2.850 ± 0.191
50
0.4
1
0.76
1
0.800 ± 0.068
0.380 ± 0.043
50
0.8
2
1.52
2
1.600 ± 0.116
0.760 ± 0.066
50
1.2
3
2.28
3
2.400 ± 0.164
1.140 ± 0.088
50
2.0
5
3.8
5
4.00 ± 0.260
1.900 ± 0.134
30
0.4
1
0.76
1
0.571 ± 0.054
0.494 ± 0.050
30
1.2
3
2.28
3
1.714 ± 0.123
1.596 ± 0.116
35
0.4
1
0.76
1
0.615 ± 0.057
0.494 ± 0.050
35
1.2
3
2.28
3
1.846 ± 0.131
1.482 ± 0.109
40
0.4
1
0.76
1
0.667 ± 0.060
0.456 ± 0.047
40
1.2
3
2.28
3
2.000 ± 0.140
1.368 ± 0.102
55
0.4
1
0.76
1
0.889 ± 0.073
0.342 ± 0.041
55
1.2
3
2.28
3
2.667 ± 0.180
1.026 ± 0.082
Input (or Tap) Switch Verification
Each input is scaled using a combination of two rotary switches. Verify the switches as follows.
Step 1.
Determine the Sensing Input Type (the first digit of the Style Number shown on the front panel):
A
Single-phase, two inputs
B
Single-phase, three inputs
C
Single-phase, four inputs
D
Single-phase, five inputs
E
Three-phase, two inputs each phase
G
Three-phase, three inputs each phase
Step 2.
Connect the input being tested to the current source as shown in the appropriate diagram,
Figures 5-2 through 5-5.
Step 3.
Set
the
INPUT
under test to the
0.78
tap position as shown in Table 5-6. Set the
RESTRAINED
PICKUP LEVEL
switch to position
A
(15%). Apply current to the input under test, increasing
the current until the
REST. TRIP
LED lights. At this point, the input current should be 0.273 A
±
6%
±
20 mA.
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