EASYTEST-COMBI519
EN - 81
6.10. V%: VOLTAGE DROP OF MAINS
This feature allows evaluating the percentage value of voltage drop between two points of
mains in which a protection device is installed and comparing this value to possible limit
values specified by guidelines. The following modes are available:
L-N Measurement of Phase to Neutral line impedance. The test can be performed
also with high resolution (0.1m) with optional accessory IMP57
L-L Measurement of Phase to Phase line impedance. The test can be performed
also with high resolution (0.1m) with optional accessory IMP57
CAUTION
The measurement of line impedance or fault loop impedance involves the
circulation of a maximum current according to the technical specifications of
the instrument (see § 10.1). This could cause the tripping of possible
magnetothermal or differential protections at lower tripping currents.
Fig. 33: Connection of the instrument for L-N mode voltage drop measurement
Fig. 34: Connection of the instrument for L-L mode voltage drop measurement
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