Basler Electric BE1-50/51B-237 - Manual (Page 13)

9252000899 Rev B BE1-50/51B-237/-238 General Information 1-3
Dropout occurs at 95% of pickup value.
Dropout
Switch selectable—no intentional delay (SW3-2 open/off) or a fixed delay of 100 ms (SW3-2 closed/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-237 Pickup
Setting increment ....................... 0.1 Aac
Accuracy .................................... Sum of ±2% and ±25 mAac
Setting Range ............................ 0.2 to 3.18 Aac
BE1-50/51B-238 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-237
1 Second Rating ........................ 400 Aac
∗ Continuous rating is 14 Aac for temperatures up to 45°C. See Figure 1-1 for derating curve.
Figure 1-1. Current Sensing Input Derating Curve (BE1-50/51B-237)
Continuous Current
Current Sensing Input
0
2
4
6
8
10
12
14
16
-40 -20 0 20 40 60
Ambient Temperature (C)
Cu
rre
nt
(Aa
c)