Benning IT 110 - Loop Impedance and Prospective Short-Circuit Current

60
Trip-out time
Measuring range (ms) Resolution (ms) Accuracy
0 - 300 (AC, A type) 1 ± 3 ms
0 - 140 (B type) 1 ± 3 ms
Contact voltage
Measuring range according to EN61557: 1.0 bis 99.9 V
Measuring range (V) Resolution (V) Accuracy
0.0 (3.0) - 9.9 0.1 (-0% / +10 %) of reading +2 digits
10.0 - 99.9 0.1 (-0% / +10 %) of reading
9.4 Loop impedance and prospective short-circuit current
Function Loop impedance (loop resistance)
Measuring range according to EN61557-3: 0.26 Ω up to 1999 Ω
Measuringrange(Ω) Resolution(Ω) Accuracy
0.00 (0.25) - 19.99 0.01
± (5 % of reading + 5 digits)20.0 - 99.9 0.1
100 - 1999 1
Prospective fault current
Measuring range (A) Resolution (A) Accuracy
0.00 - 19.99 0.01
Consider accuracy of the fault
loop resistance measurement
20.0 - 99.9 0.1
100 - 999 1
1.00 kA - 9.99 kA 10
10.0 - 24.4 kA 100
Test current (at 230 V) 2.5 A (10 ms)
Nominal voltage range 100 V - 264 V (45 Hz - 65 Hz)
Zs
rcd function
Measuring range according to EN61557: 1.37 Ω up to 1999 Ω
Measuringrange(Ω) Resolution(Ω) Accuracy
*)
0.00 (0.25) - 19.99 0.01 ± (10 % of reading + 25 digits)
20.0 - 99.9 0.1 ± 10 % of reading
100 - 1999 1 ±10 % of reading
*)
Accuracy may be impaired by heavy mains voltage noise.
RCD not tripped if I
∆N
≥ 10 mA
Test current (at 230 V) max. 0.24 A (max. period 150 µs)