Instantaneous overcurrent a (50-a) element, Be1-50/51b-235 pickup, Be1-50/51b-236 pickup – Basler Electric BE1-50/51B-235 User Manual
Page 13: Dropout, Time delay, Instantaneous overcurrent b (50-b) element, Reset characteristic, Current sensing input, Be1-50/51b-235, Instantaneous overcurrent a (50-a) element -3
9252000898 Rev B
BE1-50/51B-235/-236 General Information
1-3
Instantaneous Overcurrent A (50-A) Element
Setting Range:
2 to 99 Aac
BE1-50/51B-235 Pickup
Setting increment:
1 Aac
Accuracy:
Sum of ±2% and ±25 mAac
Setting Range:
0.4 to 19.8 Aac
BE1-50/51B-236 Pickup
Setting increment:
0.2 Aac
Accuracy:
Sum of ±2% and ±5 mAac
Dropout occurs at 95% of pickup value.
Dropout
Switch selectable—no intentional delay (SW3-2 OFF) or a fixed delay of 100 ms (SW3-2 ON). Appendix
A, Characteristic Curves illustrates the characteristic curve for the 50-A and 50-B elements.
Time Delay
Instantaneous Overcurrent B (50-B) Element
Setting Range:
1 to 15.9 Aac
BE1-50/51B-235 Pickup
Setting increment:
0.1 Aac
Accuracy:
Sum of ±2% and ±25 mAac
Setting Range:
0.2 to 3.18 Aac
BE1-50/51B-236 Pickup
Setting increment:
0.02 Aac
Accuracy:
Sum of ±2% and ±5 mAac
Dropout occurs at 95% of pickup value.
Dropout
Fixed at no intentional delay. Appendix A, Characteristic Curves illustrates the characteristic curve for the
50-A and 50-B elements.
Time Delay
Resets within 16 ms of when sensed current decreases below the pickup level.
Reset Characteristic
Current Sensing Input
Continuous Rating:
14 Aac∗
BE1-50/51B-235
1 Second Rating:
400 Aac
∗
Continuous rating is 14 Aac for temperatures up to 45°C. See Figure 1-1 for derating curve.