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Fig. 12 AVR Trimmers (potentiometers).
The power comes from 12 wires that can be connected in
star, delta or combined double / star and double / delta
arrangements to take off different voltages. For tri phase
400V use, the alternator should be connected in star. For
single voltage 230V use the wires should be connected in
double delta. The alternator is specially designed that in
this way one can take off the full power off the generator.
However the use of three groups of 230 V taken from the
three
corners
of
a
single
recommended. Other voltages (115 Volt) can be arranged
as well. Further technical data on the connections of the
alternator can be found in drawings and diagrams in this
manual.
2.5.2
Engine
The
W-SQ25
generating set is based on the Mitsubishi
S4S 4 cylinder 4 stroke diesel engine. The engine is
indirectly injected. The engine is water cooled and the
cooling liquid is cooled by a radiator.
The engine has been specially adapted for the
Power
application and is very different from the standard
engine supplied for industrial applications!
EN / W-SQ25 for mobile applications / January 2009
delta
arrangement
is
Whisper
2.5.3
Digital Diesel Control system
The standard electrical engine control system is 12 Volt
negative earth, non earth return (ungrounded) is available
as option. Check your identification data to determine
which system is applied. The system is designed
according to the "energise to run" system. The Digital
Diesel Control is a very advanced microprocessor based
full automatic system. Besides automatic start the system
offers many monitoring options. Refer to the separate
Digital Diesel Control users manual.
The microprocessor unit is located in the black box on top
of the alternator (see figure 7)
2.5.4
Battery charger
On the engine is an alternator generating 50 Amp 12V.
This current is rectified to charge the battery. The voltage
is regulated at ±14.4V.
2.5.5
Alarms and shut down
In the event of malfunctioning this will be indicated by the
failure light, details will be shown on the display and the
engine will be shut down. There are two functions
guarded: oil pressure and coolant temperature.
All alarm switches are closed when no malfunction occurs.
A contact is cut in the event of an alarm. This means that
the generating set will not work when the alarm switches
are broken or there is a loose wire. The system therefore
is intrinsically safe. The panel will display details about the
alarm.
2.5.6
Monitoring
Refer to the operating of the Digital Diesel Control
2.5.7
Control
The generating set can be operated by push buttons on
the panel on the alternator or by the remote control. By
pushing the START button the control system is activated
and will start the engine automatically. Pushing the STOP
button will stop the engine and the electrical system will be
deactivated.
INFORMATION
13
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Troubleshooting
