Generator Faults
9.12.14
Kapitel/Chapter 10: Generator Faults - Seite/Page 199
10.6.1 Monitoring the Generator Voltage
ATTENTION!
see “Safety first!” on Page 12.
The voltage range of the power stations normally lies between 200 and 240 V (100 - 130 V in the 60 Hz version).
In some countries even substantially larger tension deviations are being called „normally“.
The Fischer Panda generators are aligned that they keep these default values during normal load.
With high load or overload it can occur that the voltage drops on 190 V (95 V in the 60 Hz version) and partly still
more deeply. That can become critical for certain devices (e.g. for electric motors, cooling compressors and possibly
for electronic devices). It must be paid attention that the voltage for such consumers are sufficient. This can be
supervised by a voltmeter.
The voltmeter should be always installed behind the change over switch generator/land power, so that each voltage
source is shown. No further voltmeter is provided for the generator itself.
If additional consumers are switched on, the voltage must be controlled in each case at the voltmeter. Sensitive
devices must be switched off so long, until the voltage exceed the critical parameter.
Under certain circumstances the generator provides over voltage. This arises if the number of revolutions of the
generator is increased. Changing the number of revolutions may be made only with a tachometer and/or a voltmeter.
If sensitive and/or valuable devices are used, which are to be protected against this risk, an automatic over voltage
protection must be mounted (voltage control with disconnection).
10.6.2 Automatic voltage monitoring and auto-shut down
If air conditioning units (compressors) or other such valuable equipment is installed on-board, it is recommend that
an automatic voltage monitoring unit be installed to protect this equipment from possible sharp voltage drops. The
voltage monitoring system shuts down the entire system (and therefore all users) by means of 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). Such a relay with contactor can be obtained from the installation or as a complete unit
from your Fischer Panda dealer.
