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INFORMATION
2.4.2
Generator control panel
Internal fuel pump
Digital Diesel Control
Fuse 3A
Fuse 3A
Remove fuse
before maintenance
Auxiliary
External Fuel Pump
Fuse 10A
Fuse 3A
Fig: 7 Control panel.
Fig. 8 Digital Diesel Control unit
2.4.3
Remote control panel
01
05
01
Generator load indicator
02
Failure LED
03
Start button
04
Stop button
05
Display
06
Select button
07
Set button
Fig. 9: Digital Diesel remote control panel
12
Start / Stop
Whisper Digital Diesel Operation Unit
Observe instructions in the manual
Replace fuses with same type and rating
03
02
04
06
07
2.5
TECHNICAL INFORMATION
2.5.1
AC alternator
The single phase alternator is directly coupled, one
bearing, brushless, rotating field design, four poles (1500
RPM) and self regulating.
Residual magnetism causes a small voltage over the
stator windings and allows a current to flow in the
windings, which is magnified because of the feed back
effect between rotor and stator. The field windings in the
rotor are short-circuited over a diode to rectify the current.
A capacitor over an additional winding in the stator which
is at an angle with the power-winding keeps the voltage
stable within 5 % at the specified rpm and provides voltage
fall off with speed, preventing over-excitation at low engine
speeds and softening the effect of load switching to relieve
the burden on the engine.
The alternator is water cooled and the cooling liquid is
cooled by a radiator. Further technical data on the design
of the alternator can be found in drawings and diagrams in
this manual.
2.5.2
Engine
The
W-SQ12
generating set is based on the Mitsubishi
S4L2 4 cylinder 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!
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
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 three functions
January 2009 / W-SQ12 for mobile applications / EN
Whisper
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Table of Contents
Troubleshooting
