METREL MI 3399, Инструкция с упражнениями

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Electrical Installation Safety Trainer AD 1 - MI 3399
59
Measuring procedure
1 First the reference line impedance has to be measured. This is done by using the
voltage drop measuring function
dU .
To measure the reference line impedance in an IT system first click on the
reference line impedance measurement button. Then press the start measurement
button to measure the actual voltage drop.
The reference line impedance should be done only on the one socket outlet which
is selected as the reference one. All subsequent voltage drop measurements are
then based on that reference line impedance.
2 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
).
3 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.