BENNING IT 115
Technical data
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7.4 Loop impedance and prospective short-circuit current
7.4.1 Zs function (for systems without RCD)
Loop impedance
Measuring range according to EN 61557-3: 0.25
9.99 k
Measuring range (
)
Resolution (
)
Accuracy
0.00
9.99
0.01
(5 % of the measured value + 5 digits)
10.0
99.9
0.1
100
999
1
10 % of the measured value
1.00 k
9.99 k
10
Prospective short-circuit current (calculated value)
Measuring range (A)
Resolution (A)
Accuracy
0.00
9.99
0.01
Please observe the accuracy of the loop
resistance measurement.
10.0
99.9
0.1
100
999
1
1.00 k
9.99 k
10
10.0 k
23.0 k
100
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)
7.4.2 Zsrcd function (for systems with RCD)
Loop impedance
Measuring range according to EN 61557-3: 0.46
9.99 k
Measuring range (
)
Resolution (
)
Accuracy
0.00
9.99
0.01
(5 % of the measured value + 10
digits)
10.0
99.9
0.1
100
999
1
10 % of the measured value
1.00 k
9.99 k
10
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
Please observe the accuracy of the
loop impedance measurement.
10.0
99.9
0.1
100
999
1
1.00 k
9.99 k
10
10.0 k
23.0 k
100
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).
