BENNING IT 115
Device description
- 45 -
Note:
High fluctuations of the nominal voltage might influence the measuring results (
icon
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)
and the three-wire test cable
How to perform voltage drop measurements
Step 1:
Measuring the impedance Zref at the reference point
Select the
Z
I
(L-N/L)
[English: Z
LINE
(L-N/L)] function by means of the function selector
switch.
Set the sub-function to
ΔU
.
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
ΔU
.
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.
Step 1 - Zref
Step 2 - Voltage drop
Figure 5.31: Example of a voltage drop measurement
