10
July 2004 / WHISPER 16 ULTRA Mobile / EN
INFORMATION
2.4.2 Generator control panel
1
Fuse 10A;
2
Fuse 3A;
3
Start/stop button.
2.4.3 Remote control panel
1
Start button;
2
Stop button;
3
Select button;
4
Set button;
5
Failure lamp;
6
Generator load indicator.
7
Display
2.5 TECHNICAL INFORMATION
2.5.1 AC
alternator
The single phase synchronous alternator is directly
coupled, one bearing, brushless, rotating field design,
four pole (1500 RPM) and self regulating.
Residual magnetism causes a small voltage over the sta-
tor windings and allows a current to flow in the windings,
which is magnified because of the feed back effect be-
tween rotor and stator. The field windings in the rotor are
short-circuited over a diode to rectify the current. A capa-
citor over an additional winding in the stator which is in
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.
Further technical data on the design of the alternator can
be found in drawings and diagrams in this manual. The
alternator is watercooled and the cooling liquid is cooled
by a radiator.
2.5.2 Engine
The Whisper generating set is based on the Mitsubishi
S4Q2 4 cylinder diesel engine. The engine is indirectly in-
jected. The engine is water cooled and the cooling liquid is
cooled by a radiator.The engine has been specially adapted
for the Mastervolt application and is very different from the
standard engine as 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 is available as optional.
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 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 14.2V.
2.5.5 Alarms and shut down
In case of malfunctioning this will be indicated by the fai-
External Fuel Pump
Protection-fuse
10 A
Digital Diesel Control
Protection-fuse 3 A
Remove fuse
during maintenance
Whisper Generator Control
Press for start/stop
10 A
3 A
1
2
3
Fig. 5: Digital Diesel remote control panel.
Fig.. 3: Control panel.
hold
gnd
te
m
str
.
exh
oil
re
g
alt.
fuel
heat start
fuel fail
st
gl
+
pull
ct
-2
ct
-1
ct
-1
ct
-2
AC-1
AC-2
Fig.. 4: Digital Diesel Control unit
6
1
2
7
4
3
5
