Generator Failure
Page 54 Panda 14.000 NE PVK-U S00420 - Chapter D: Generator Failure
Checking windings.
• Disconnect all the cables from the terminals in the AC-connection 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 values 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
If you find any anormality, when doing this test, please ask your Fischer Panda dealer.
If the measured resistance values deviate from each other significantly, then there is probably a
short within the coils. A short within the coils can prevent the generator from achieving the requi-
red excitation and therefore from reaching the rated power output. The values listed in the above
table, represent the approximate range of acceptable resistances. Most important is that the
measures values do not deviate significantly from one another. Large resistance value deviations
between phases indicate a short-circuit in the windings. In this case the generator must be newly
wound by a qualified technician.
D.3.1 Measuring the Coil Inductive Resistance
Unfortunately a reliable assessment of the winding's performance cannot be attained through
checking only coil resistances. However, the symmetry of the coil resistances is a good indicator
of winding performance. If the coil resistances are symmetric, the next step is to measure the win-
ding's inductive resistance using a special meter (capable of measuring milli-Henrys).
The coil induction is measured and compared in the same manner as the electrical resistance
(i.e. the windings are compared for symmetry). These parts must have the same values.
An alternative test method to check the stator windings can be performed as follows:
1. Ensure that the connection to the circuit system is disconnected.
2. All electrical wires in the generator terminalbox must be disconnected.
3. Reconnect the battery connections.
4. Start the generator.
5. Measure the voltages between the following terminals and compare for symmetry:
L1-L2, L2-L3, L1-L3
Summary of Contents for Panda 14.000 NE PVK-U
Page 1: ...Generator type Panda 14 000 NE PVK U 400V 50 Hz 12kW Icemaster Fischer Panda...
Page 28: ...The Panda Generator Page 24 Panda 14 000 NE PVK U S00420 Chapter A The Panda Generator...
Page 62: ...Generator Failure Page 58 Panda 14 000 NE PVK U S00420 Chapter D Generator Failure...
Page 92: ...Appendix Page VIII Panda 14 000 NE PVK U S00420 Chapter F Appendix...
Page 94: ...Measurements Page X Panda 14 000 NE PVK U S00420 Chapter F Appendix F 7 Measurements...
Page 96: ...Wiring diagram control panel Page XII Panda 14 000 NE PVK U S00420 Chapter F Appendix...
