Current sensing, Current detector pickup time, Current detector dropout time – Basler Electric BE1-BPR User Manual
Page 17: Current pickup range, Current pickup accuracy, Sample rate, Oscillograph recording range, Oscillograph data accuracy, Current sensing -5, Current detector pickup time -5
9272000990 Rev J
BE1-BPR General Information
1-5
Current Sensing
Four isolated inputs with a maximum burden of less than 0.1 ohm.
5 Ampere CT:
Maximum continuous current: 20 Aac
Maximum one second current: 500 Aac
1 Ampere CT:
Maximum continuous current: 4 Aac
Maximum one second current: 80 Aac
Current Detector Pickup Time
1 ¼ cycle maximum for current 125% greater than pickup.
Instantaneous Fault Detector (50/60 Hz RMS Filter Type 1 and 3)
Maximum pickup time is (Window_size/C_PM + 1 ¼ (cy)), where Window_size = Filter window size in
cycles (Range 1 - 100) and C_PM = Current Pickup Multiple
Moving Average Window Fault Detector (50/60 Hz RMS Filter Type 2)
Current Detector Dropout Time
Dropout/pickup ratio: 90%, typical. One-quarter cycle (4.2 milliseconds @ 60 hertz) from the time the
current falls below and stays below 25% of the RMS level or 1 ¼ cycle from the time the RMS current
signal decreases to less than 75% of pickup.
Instantaneous Fault Detector (50/60 Hz RMS Filter Type 1 and 3)
Maximum dropout time is (Window_size-(Window_size/C_PM) + 1 ¼ (cy)), where Window_size = Filter
window size in cycles (Range 1 - 100) and C_PM = Current Pickup Multiple level before dropout.
Moving Average Window Fault Detector (50/60 Hz RMS Filter Type 2)
Current Pickup Range
Three independent settings, selectable as three-phase or neutral.
5 ampere CT:
0.25 to 9.99 amperes selectable in 0.01 increments
Instantaneous Fault Detector (50/60 Hz RMS Filter Type 1 and 3)
1 ampere CT:
0.05 to 2.00 amperes selectable in 0.01 increments
5 ampere CT:
0.05 to 1.00 amperes selectable in 0.01 increments
Moving Average Window Fault Detector (50/60 Hz RMS Filter Type 2)
1 ampere CT:
0.01 to 0.20 amperes selectable in 0.01 increments
Current Pickup Accuracy
5 ampere CT:
±
2% of pickup setting or ±0.05 Aac (whichever is greater)
Instantaneous Fault Detector (50/60 Hz RMS Filter Type 1 and 3)
1 ampere CT:
±
2% of pickup setting or ±0.01 Aac (whichever is greater)
5 ampere CT:
±
25% with window of 10 cycles or larger
Moving Average Window Fault Detector (50/60 Hz RMS Filter Type 2):
1 ampere CT:
±
25% with window of 10 cycles or larger
Sample Rate
12 samples per cycle (720 samples per second at 60 hertz, 600 samples per second at 50 hertz).
Oscillograph Recording Range
5 ampere CT:
0 - 200 amperes, rms
1 ampere CT:
0 - 40 amperes, rms
Oscillograph Data Accuracy
±
0.2% of full scale or 5% of reading, whichever is greater