Benning IT 130 - 8.4 Loop impedance and prospective short-circuit current

BENNING IT 130 Technical data
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8.4 Loop impedance and prospective short-circuit current
8.4.1 Zs function (for systems without RCD)
Loop impedance
Measuring range according to EN 61557-3: 0.25 Ω ÷ 9.99 kΩ
Measuring range (Ω
ΩΩ
Ω) Resolution (Ω
ΩΩ
Ω)
Accuracy
0.00 ÷ 9.99
0.01
10.0 ÷ 99.9
0.1
± (5 % of the measured value + 5 digits)
100 ÷ 999
1
1.00 k ÷ 9.99 k
10
±10 % of the measured value
Prospective short-circuit current (calculated value)
Measuring range (A) Resolution (A) Accuracy
0.00 ÷ 9.99
0.01
10.0 ÷ 99.9
0.1
100 ÷ 999
1
1.00 k ÷ 9.99 k
10
10.0 k ÷ 23.0 k
100
Please observe the accuracy of the loop
resistance measurement.
The accuracy specified shall apply provided that the mains voltage is stable during measurement.
Testing current (at 230 V) ...................... 6.5 A (10 ms)
Nominal voltage range........................... 93 V ÷ 134 V (45 Hz ÷ 65 Hz)
185 V ÷ 266 V (45 Hz ÷ 65 Hz)
8.4.2 Zsrcd function (for systems with RCD)
Loop impedance
Measuring range according to EN 61557-3: 0.46 Ω ÷ 9.99 kΩ
Measuring range (Ω
ΩΩ
Ω) Resolution (Ω
ΩΩ
Ω)
Accuracy
0.00 ÷ 9.99
0.01
10.0 ÷ 99.9
0.1
±(5 % of the measured value + 10
digits)
100 ÷ 999
1
1.00 k ÷ 9.99 k
10
±10 % of the measured value
Accuracy might be impaired due to interference voltages in the mains voltage.
Prospective short-circuit current (calculated value)
Measuring range (A) Resolution (A) Accuracy
0.00 ÷ 9.99
0.01
10.0 ÷ 99.9
0.1
100 ÷ 999
1
1.00 k ÷ 9.99 k
10
10.0 k ÷ 23.0 k
100
Please observe the accuracy of the
loop impedance measurement.
Nominal voltage range........................... 93 V ÷ 134 V (45 Hz ÷ 65 Hz)
185 V ÷ 266 V (45 Hz ÷ 65 Hz)
No tripping of the residual current protection device (RCD).