10 May 2004 / WHISPER 15 ULTRA / USA
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 (1800 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.
2.5.2 Engine
The Whisper 9,5 / 12,5 ULTRA generating set is based
on the Mitsubishi S3L2 3 cylinder diesel engine. The
engine is indirectly injected. The engine is water cooled
and the cooling liquid is cooled by a heat exchanger and
raw water. The heat exchanger and all other parts which
are in direct contact with the raw (sea) water are made of
seawater resistant material like naval brass and
gunmetal.
The engine has been specially adapted for the Mastervolt
application and is very different from the standard engine
as supplied for industrial applications! The engine fullfills
EPA emission standards and is certified and labeled as
such.
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.
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