Benning IT 105 - 7.1 Voltage (V) frequency (Hz); 7.2 Continuity test (RLow); 7.3 Insulating resistance measuring (Riso); 7.4 Loop impedance (Zs)

11/ 2018 BENNING IT 105
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7.4 Loop impedance (ZS)
Measuring range Resolution Accuracy
high test current:
0.20 Ω - 1999 Ω max. 0.01 Ω ± (5 % + 5 digits)
without RCD tripping:
1.00 Ω - 1.99 Ω 0.01 Ω ± (5 % + 12 digits)
2.0 Ω - 19.9 Ω 0.1 Ω ± (5 % + 12 digits)
20 Ω - 1999 Ω 1 Ω ± (5 % + 5 digits)
Mains voltage: 195 V - 253 V, 45 Hz - 65 Hz
Nominal test current: < 15 mA (without RCD tripping)
3 A (high test current)
Fault current range (PFC): 0 A - 26 kA, for measured values < 10 A and > 999 A, a “-” is noted as
decimal separator
7.5 Line impedance (ZI)
Measuring range Resolution Accuracy
0.20 Ω - 1999 Ω max. 0.01 Ω ± (5 % + 5 digits)
Mains voltage: 195 - 253 V, 45 Hz - 65 Hz
328 V - 440 V, 45 Hz - 65 Hz
Nominal test current: 3 A
Short-circuit current range (PSC): 0 A - 26 kA, for measured values < 10 A and > 999 A, a “-” is noted as
decimal separator
7.6 RCD test
Measuring range Resolution Accuracy
0 ms - 2000 ms (½ I∆N) 1 ms ± (5 % + 2 digits)
0 ms - 400 ms (I∆N, standard) 1 ms ± (5 % + 2 digits)
0 ms - 500 ms (I∆N, selective) 1 ms ± (5 % + 2 digits)
0 ms - 40 ms (5 I∆N) 1 ms ± (5 % + 2 digits)
Mains voltage: 195 V - 253 V, 45 Hz - 65 Hz
Nominal test current: 10 mA, 30 mA, 100 mA, 300 mA (type AC, A) 500 mA (type AC)
Test current accuracy: - 0 %, + 10 % with I∆N and 5 I∆N
- 10 %, + 0 % with ½ I∆N
Tripping current range: ½ I∆N - 1,1 I∆N (type AC, sinusoidal)
½ I∆N - 1,5 I∆N (type A, pulsating)
Tripping current accuracy: 10 %
Type AC: testing current sinusoidal
Type A: testing current pulsating
8. Measuring with the BENNING IT 105
8.1 Preparations for measuring
Operate and store the BENNING IT 105 only at the specified storage and operating temperatures. Avoid
continuous insulation.
- Check the nominal voltages and nominal current on the safety measuring leads.
- Strong sources of interference in the vicinity of the BENNING IT 105 might lead to unstable readings
and measuring errors.
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Before starting the installation tester, always check it as well as all measuring leads and
wires for signs of damage.
8.1.1 Switching the BENNING IT 105 ON/OFF
- Turn the rotary switch
1
from position “OFF” F to the desired measuring function to switch on the
BENNING IT 105.