13-36
Testing And Maintenance
BE1-CDS220
Table 13-20. Maximum Restraint Pickup Test Points (5 A Sensing Input)
Sensing
Input 1
Input 2
Increasing Input 1
Decreasing Input 2
Input Minimum slope
tap =
2.00
tap =
3.80
From Balance
From Balance
Type
Pickup
(%)
Bal. Input (A)
PU
Bal. Input (A)
PU
Pickup (A)
Pickup (A)
5
0.35
15
2.00 1 3.80 1
2.70
±
0.108 2.47
±
0.099
5
0.35
15
10.00 5 19.00 5
11.76
±
0.470 16.15
±
0.646
5
0.35
30
2.00 1 3.80 1
2.86
±
0.108 2.47
±
0.089
5
0.35
30
10.00 5 19.00 5
14.29
±
0.572 13.30
±
0.532
5
0.35
45
2.00 1 3.80 1
3.64
±
0.146 2.09
±
0.084
5
0.35
45
10.00 5 19.00 5
18.18
±
0.727 10.45
±
0.418
5
0.35
60
2.00 1 3.80 1
5.00
±
0.200 1.52
±
0.075
5
0.35
60
10.00 5 19.00 5
25.00
±
0.100 7.60
±
0.304
Table 13-21. Maximum Restraint Pickup Test Points (1 A Sensing Input)
Sensing
Input 1
Input 2
Increasing Input 1
Decreasing Input 2
Input Minimum slope
tap =
2.00
tap =
3.80
From Balance
From Balance
Type
Pickup
(%)
Bal. Input (A)
PU
Bal. Input (A)
PU
Pickup (A)
Pickup (A)
1
0.35
15
0.40 1 0.76 1
0.54
±
0.025 0.49
±
0.025
1
0.35
15
2.00 5 3.80 5
2.35
±
0.094 3.23
±
0.129
1
0.35
30
0.40 1 0.76 1
0.57
±
0.025 0.49
±
0.025
1
0.35
30
2.00 5 3.80 5
2.86
±
0.114 2.66
±
0.106
1
0.35
45
0.40 1 0.76 1
0.73
±
0.029 0.42
±
0.025
1
0.35
45
2.00 5 3.80 5
3.64
±
0.146 2.09
±
0.084
1
0.35
60
0.40 1 0.76 1
1.00
±
0.040 0.30
±
0.025
1
0.35
60
2.00 5 3.80 5
5.00
±
0.200 1.52
±
0.061
Step 8.
Remove both currents.
Step 9.
For each change in slope value indicated, send the commands listed in Table 13-22 to the
relay to invoke a change in slope settings (notice the leading comma (,) in the S#-87
command).
Table 13-22. Setup Commands
Command Purpose
A= Gain
access
S#-87=,30
Minpu = no change, slope = 30%
E Exit
Y Save
settings
Step 10. Repeat Steps 2 through 4 for phases B and C unless all phases were tested during the
restraint pickup tests in Step 5. If so, proceed with the next step.
Step 11.
(Optional) Repeat Steps 2 through 5 for setting groups 1 through 3 using the CS/CO-GROUP
command to change setting groups.
If you are applying this relay using the
average restraint
operating characteristic, you may begin your
testing at Step 12, otherwise go back to Step 4 to test for the maximum restraint operating characteristic.
For more information on testing using the average restraint operating characteristic, see Sidebar 13-5 and
Sidebar 13-6.
Summary of Contents for BE1-CDS220
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