Generator Failure
Seite/Page 150 - Kaptitel/Chapter 8: Generator Failure
16.1.15
manufacturer should be consulted for possible solutions (for example: stronger capacitors, gradual power-up swit-
ches, or a specially designed starting unit for electric motors).
System efficiency can be improved by up to 50% and motor current draw (to start) reduced by as much as 100% if it
is properly designed. If the inductive load (i.e. E-Motor) is more than 20% of the generator nominal power, a com-
pensation is necessary. See also the information brochure "Special information for operation of Panda generators
with inductive load".
8.5.2 Generator Voltage Fluctuations and Monitoring
Notice!:
Before working (installation) on the System read the section Safety Instruc-
tions in this Manual.
During periods of high electric loading, the voltage may drop to 190V/50Hz (or 95V/60Hz) or even lower. Such
voltage drops can potentially cause damage to certain electrical devices such as electric motors, compressors and
electronic equipment. In order to ensure that sufficient voltage is available and to avoid the risk of damage to sensi-
tive electrical devices, the supply voltage should be monitored with the voltmeter, which is mounted at the operation
unit.
The voltmeter must be respectively checked if additional load is switched on. As long as the voltage remains below
the critical level the sensitive devices must be switched off during this period.
Overvoltage can be caused by the generator under certain circumstances. This occurs, especially if the speed of the
motor changes (increases in speed). Adjustment to the normal motor speed (rpm) should only be done with the use
of a rev counter and/or a voltmeter.
A voltage regulated circuit breaker is installed in the electrical system in order to avoid damage, if sensitive or
valuable equipment is used. (voltage control with circuit breaker).
8.5.3 Automatic Voltage Monitoring and Auto-Shut Down
If air conditioning units (compressors) or other such valuable equipment are installed on-board, an automatic voltage
monitoring unit should be installed to protect this equipment from possible sharp voltage drops. The voltage moni-
toring system shuts down the entire system (and therefore all users) through a circuit breaker relay as soon as the
voltage falls below a set value (the monitor will also shut down the on board grid automatically when the generator is
stopped). The monitoring system also switches the grid back on once the required voltage level is again reached.
This ensures no damage is caused to the load and fittings through undervoltage. Such a voltage relay can be obtai-
ned from wholesale dealers or as a complete unit from PANDA dealers.
The circuit is always automatically cut off if the generator is stopped.
8.6
Starting Problems
8.6.1 Fuel Solenoid Valve
All engines are equipped with an electric inlet fuel solenoid valve (12V) which switches off the motor.
The fuel solenoid valve is located in front of the injection pump. It opens automatically, if the "START"-button is
pressed on the remote control panel. The solenoid valve is CLOSED when the generator main power is switched
"OFF". For this reason, it requires a few seconds before the motor comes to a full halt
If the generator fails to start, runs rough, does not reach the proper RPM, or does not stop properly, the first item to
suspect in most cases is the fuel solenoid valve and should be inspected first.
