Voltage Drop - Benning IT 130 Operating Manual

BENNING IT 130
Note:
High fluctuations of the nominal voltage might influence the measuring results (
on the LC display). In this case, it is recommended to repeat the measurements and to
check whether the measuring results are stable.

5.6.2 Voltage drop

Voltage drop calculation is based on the difference between the line impedance at the
measuring point (e.g. socket) and the line impedance at the reference point (e.g. distribution).
Connection plan
Figure 5.30: Connection of the optional "Commander" test plug (044149)
How to perform voltage drop measurements
Step 1: Measuring the impedance Zref at the reference point
Select the Z
switch.
Set the sub-function to ∆U.
Set the testing parameters.
Connect the test cables to the test object (see figure 5.30).
Press the "CAL" key to start the measurement.
Step 2: Measuring the voltage drop at the measuring point
Set the sub-function to ∆U.
Set the testing parameters (the fuse type has to be selected).
Connect the test cables to the test object (see figure 5.30).
Press the "TEST" key to start the measurement.
Save the measuring result by pressing the "MEM" key (optional).
Step 1 - Zref
and the three-wire test cable
(L-N/L) [English: Z
I
Figure 5.31: Example of a voltage drop measurement
(L-N/L)] function by means of the function selector
LINE
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Measurements
Step 2 - Voltage drop
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