Benning IT 130 - Page 58

BENNING IT 130 Measurements
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Figure 5.43: Connection of the three-wire test cable in RCD-protected installations
How to perform single-fault leakage current measurements
 Set the earthing system according to chapter 4.4.4 to the IT network type.
 Select the R
ISO
function by means of the function selector switch.
 Set the sub-function to ISFL.
 Set the limiting value (optional).
 Connect the test cables to the test object (see figure 5.42 and 5.43).
 Press the "TEST" key to start the measurement.
 Save the measuring result by pressing the "MEM" key (optional).
Figure 5.44: Examples of single-fault leakage current measurements
Results displayed:
Isc1 .......... single-fault leakage current at single fault (earth fault) between L1 and
protective conductor (PE)
Isc2 .......... single-fault leakage current at single fault (earth fault) between L2 and
protective conductor (PE)