Benning IT 110 - Loop Resistance and Prospective Fault Current

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Contact voltage
Measuring range (V) Resolution (V) Accuracy
0.0 ÷ 9.9 0.1 (-0 %/ +15 % of reading + 2 digits)
10.0 ÷ 99.9 0.1 (-0 %/ +15 % of reading)
12.4.2 Loop resistance and prospective fault current
Rs sub-function
IncompliancewithEN61557-3,themeasuringrangeisbetween0.32Ω÷1999Ω.
Measuring range (Ω) Resolution (Ω) Accuracy
0.00 ÷ 19.99 0.01 ±(5 % of reading + 5 digits)
20.0 ÷ 99.9 0.1
100 ÷ 1999 1
*) The accuracy shall apply provided that the mains voltage is stable during measurement.
Prospective fault current (calculated value)
Measuring range (A) Resolution (A) Accuracy
0.00 ÷ 19.99 0.01
Please observe the accuracy
of the fault loop resistance
measurement.
20.0 ÷ 99.9 0.1
100 ÷ 999 1
1.00 k ÷ 9.99 k 10
10.0 ÷ 24.4 k 100
Calculation of I
PFC
I
PFC
= U
N
× k
SC
/ Z
L-PE
U
N
=55V,(44V≤U<61V)fortheselectedsingle-phasenetwork(55V)
U
N
=63V,(56V≤U<70V)fortheselectedthree-phasenetwork(63V)
Testing current 1.9 A (10 ms)
Nominal input voltage 55 V / 63 V (45 Hz ÷ 65 Hz)
Test options L1-PE and L2-PE
Trip protection sub-function Rs(rcd)
IncompliancewithEN61557,themeasuringrangeisbetween0.85Ω÷1999Ω.
Measuring range (Ω) Resolution (Ω) Accuracy
0.00 ÷ 19.99 0.01 ±(10 % of reading + 15 digits)
20.0 ÷ 99.9 0.1 ±(10 % of reading)
100 ÷ 1999 1 ±(10 % of reading)
*) The accuracy can be affected by strong noise of the mains voltage.
Prospective fault current (calculated value)
Measuring range (A) Resolution (A) Accuracy
0.00 ÷ 19.99 0.01
Please observe the accuracy
of the fault loop resistance
measurement.
20.0 ÷ 99.9 0.1
100 ÷ 999 1
1.00 k ÷ 9.99 k 10
10.0 ÷ 24.4 k 100
Calculation of I
PFC
I
PFC
= U
N
× k
SC
/ Z
L-PE
U
N
=55V,(44V≤U<61V)fortheselectedsingle-phasenetwork(55V)
U
N
=63V,(56V≤U<70V)fortheselectedthree-phasenetwork(63V)