Generator Control Panel; Remote Control Panel; Technical Information; Ac Alternator - Mastervolt whisper 16 ultra User Manual

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
Copyright © 2008 Mastervolt / November 2008 / WHISPER 16 ULTRA Three phase / EN
2.5

TECHNICAL INFORMATION

2.5.1

AC alternator

The tri phase synchronous alternator is directly coupled,
one bearing, brushless, rotating field design, 6 or 12 wire
(depending on the alternator model), four pole, (1500
RPM) and regulated by an Automatic Voltage Regulator
(AVR).
The exciter stator has a residual magnetism, which
guarantees self-exciting of the generator on start-up (that
thereby generates a residual voltage of about 10%
nominal voltage).
Fig. 10 Automatic Voltage Regulator (AVR).
The AVR, powered by an auxiliary circuit on the main
stator, acts on the exciter stator indirectly controlling the
field generated by the main rotor by means of the
sequence exciter rotor - diode bridge - main rotor.
The voltage regulator controls and keeps constant the
average voltage of one phase. The voltage setting on the
AVR can be adjusted with the help of a trimmer "V" (See
par.5.3.1)
A frequency control progressively deactivates the machine
when the drive motor speed drops below a pre-set,
adjustable threshold preventing over-excitement at low
operating speeds and abating the load engage effects on
the engine.
The AVR works only within limits of the set frequency 50
Hz. When operating below the lower limit of 46 Hz ± 1 Hz
the AVR will stop regulating to avoid overloading the
exciter coil. When applying the generator set at 60 Hz the
AVR is re-adjustable as well. To operate at 60 Hz the
engine RPM and Digital Diesel Control settings must also
be changed. For the USA market a dedicated manual is
available for 60 Hz applications. Please refer to the
Mastervolt service centre for specific instructions to
convert the generating set to 60 Hz.
It is not possible to take off the full power from the Whisper
12 ULTRA Three Phase by reconnecting the alternator to