Benning IT 130 - Page 33

BENNING IT 130 Measurements
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How to perform voltage measurements
 Select the V≅
≅≅
≅ function by means of the function selector switch. The display shows
VOLTAGE TRMS.
 Connect the test cables to the test object (see figure 5.2 and figure 5.3).
 Save the measuring result by pressing the "MEM" key.
The measurement is performed immediately after the VOLTAGE TRMS function has been
selected.
Figure 5.4: Examples for voltage measurements in single-phase and three-phase systems
Results displayed for single-phase systems:
Uln ........... voltage between phases and neutral conductor
Ulpe ......... voltage between phase and protective conductor
Unpe ........ voltage between neutral and protective conductors
f................ frequency
Results displayed for three-phase systems:
U12........... voltage between testing terminals L1 and L2
U13........... voltage between testing terminals L1 and L3
U23........... voltage between testing terminals L2 and L3
1.2.3 ......... correct connection – clockwise phase sequence
3.2.1 ......... wrong connection – counter-clockwise phase sequence
f................ frequency
Results displayed for IT systems:
U12........... voltage between testing terminals L1 and L2
U1pe ........ voltage between testing terminals L1 and PE
U2pe ........ voltage between testing terminals L2 and PE
f................ frequency