METREL MI 3399, Инструкция с упражнениями

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Electrical Installation Safety Trainer AD 1 - MI 3399
52
2.2.3 Exercises
2.2.3.1 Exercise No. 2.2-1: dU, Z
L-N
and I
PSC
measurement on the
supply side
Measuring connection topology
Figure 2-7: Topology in a 1-phase TN system on the supply side
Measuring procedure
1 To measure the line impedance select the line impedance measurement Z
L-L, L-N
( Z line ) which measures impedance between phase and neutral conductors.
The line impedance measured at the supply side is actually the reference line
impedance (Z
REF
).
To measure the voltage drop select the voltage drop measurement dU .
If the voltage drop is measured at this test point then, the drop should actually be
0,0% since the measured and reference impedances should be the same.
2 To get correct readings during measurement select the appropriate fuse settings
(fuse type, size and trip-out time) by clicking in the bottom left dark grey corner.