Fischer Panda 22-4 HD PVMV-N, Руководство пользователя

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Generator Failure
10.5.11 Panda 8000-42NE PVMV-N.R01 - Kapitel/Chapter 8: Generator Failure Seite/Page 111
Fig. 8.7.5-11: Wiring diagram DVS - 230 V + 400 V / 50 Hz
8.7.6 Coil Resistance Measurements in Stator Windings
When there are neither faults with the capacitors nor any low or high voltage "shorts" in the windings to ground, the
windings should then be tested for the correct coils resistance (for shorts between wires within the coils). To mea-
sure coil resistance a meter capable of measuring low resistances (Milli-Ohm resolution if possible) accurately.
8.7.6.1 Checking windings.
• Disconnect all the cables from the terminals in the AC-con-
nection box.
• Remove the Neutral- Ground connection.
• Take all the winding connection cables from the terminal
bolts.
• Switch your meter in resistance range. When you put the
probes of you meter together, you should get a reading of
0.00Ohm. When you isolate the probes, the reading will be
Overflow. Please do this tests to check your meter.
• Measure the resistance between the separate windings.
Maybe the readings of your meter do not comply with the va-
lues of the table in the appendix. In every case the relation
between the values should be the same. Some meters do
not work fine, when values are very small.
• Measure the resistance between the different windings.
When you find a value in the 20 Mega- Giga Ohm range, the
winding is ok.
• Measure the resistance between the different windings and
housing of the alternator. Here you should also find a value
in the Giga-Ohm range. When the winding is shorted to
ground, maybe you are not able to measure this, because
the voltage of your meter is a few volts. In this case to get a
save reading, use a MEGA-meter with a high test voltage