Basler BE1-CDS220, Instruction Manual, Page: 364 / 476

13-50 Testing And Maintenance BE1-CDS220
NOTE
Tables 13-38 and 13-39 show values for testing the relay either by increasing input 2
(neutral) current or decreasing the ground input current. Both methods are shown for
convenience and either method may be used. For differences in measurement of the two
methods, refer to the paragraphs in this Section,
Functional Testing , Restrained Pickup
and Sidebar 13-3, Maximum Restraint Operating Characteristic .
Step 4. Input current values for this step are provided in Table 13-38 or 13-39. Apply balancing current
to phase A input 2 (represented as the Neutral column) and the ground input as indicated in
each row and slowly increase phase A input 2 until OUT1 closes.
Step 5. Remove both currents.
Step 6. Verify the restrained pickup accuracy as listed in the appropriate Table (13-38 or 13-39).
Step 7. (Optional) Repeat Steps 2 through 6 for setting groups 1 through 3 using the CS/CO-GROUP
command to change setting groups.
Table 13-38. Restraint Pickup Test Points (87ND – 5 Ampere Sensing Input)
Sensing Neutral (Input 2) Ground Increasing Input 2 Decreasing I
G
Input Minimum slope Calc. Tap = 2.00 Calc. Tap = 2.00 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 2.00 1 2.70
±
0.108 1.30
±
0.075
5 0.35 15 10.00 5 10.00 5 11.76
±
0.470 8.50
±
0.340
5 0.35 30 2.00 1 2.00 1 2.86
±
0.108 1.30
±
0.075
5 0.35 30 10.00 5 10.00 5 14.29
±
0.572 7.00
±
0.280
5 0.35 45 2.00 1 2.00 1 3.64
±
0.146 1.10
±
0.075
5 0.35 45 10.00 5 10.00 5 18.18
±
0.727 5.50
±
0.220
5 0.35 60 2.00 1 2.00 1 5.00
±
0.200 0.80
±
0.075
5 0.35 60 10.00 5 10.00 5 25.00
±
0.100 4.00
±
0.160
Table 13-39. Restraint Pickup Test Points (87ND – 1 Ampere 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 0.40 1 0.54
±
0.025 0.26
±
0.025
1 0.35 15 2.00 5 2.00 5 2.35
±
0.094 1.70
±
0.068
1 0.35 30 0.40 1 0.40 1 0.57
±
0.025 0.26
±
0.025
1 0.35 30 2.00 5 2.00 5 2.86
±
0.114 1.40
±
0.056
1 0.35 45 0.40 1 0.40 1 0.73
±
0.029 0.22
±
0.025
1 0.35 45 2.00 5 2.00 5 3.64
±
0.146 1.10
±
0.044
1 0.35 60 0.40 1 0.40 1 1.00
±
0.040 0.16
±
0.025
1 0.35 60 2.00 5 2.00 5 5.00
±
0.200 0.80
±
0.032
Instantaneous Overcurrent
Pickup and Dropout Verification (50T/150T/250T)
Purpose: To verify the accuracy of the operation of the 50T/150T/250T elements.
Reference Commands: SL-50T/150T/250T, SL-GROUP, SL-VO