Basler Electric BE1-50/51B-244 - Manual (Page 13)

9252000793 Rev C BE1-50/51B-244 General Information 1-3
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-244 Pickup
Setting increment: 0.1 Aac
Accuracy: Sum of ±2% and ±25 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-244
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-244)
Figure 1-2
BE1-50/51B-244 Burden
illustrates the current sensing input burden characteristic.
At 0.5 Aac: 2.8 Ω
At 5.0 Aac: 0.3 Ω
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)