Westerbeke 8.0KW-60Hz Service Manual page 86

BT GENERATOR SINGLEJTHREE PHASE
This generator is a four-pole, brushless, self-excited generator
which requires' only the driving force of the engine to pro-
duce AC output. The copper and laminated iron in the exciter
stator are responsible for the self-exciting featore of this gen-
erator. The magnetic field produced causes an AC voltage to
be induced into the related exciter rotor windings during rota-
tion. Diodes located in the exciter rotor rectify this voltage
to
DC and supply it to the windings of the rotating field. This
creates an electromagnetic field which rotates through the
windings of the main stator, inducing an AC Voltage which is
, supplied to a load. A step down transformer is connected in
parallel
to
the AC output of the main stator. An AC voltage is
produced in the auxiliary windings of the transformer and the
main stator and is, in turn, supplied to a full-wave bridge rec-
tifier.
The
rectifier produces a DC voltage to further excite
the exciter stator windings, enabling the generator to produce
a rated AC output. An optional solid-state voltage regulator is
available to work in tandem with the transformer regulator to
produce a more stable AC output '
AVR
AC TERMINAL BOARD
.....
~I'Lt."
UH
SWITCH NO LOAD
BT GENERATOR
SINGL~
PHASE
[GSTUD]
20A
BA __ ••
~~
A circuit breaker is installed on all WESTERBEKE genera-
tors. This circuit bre\lker will automatically disconnect gener-
ator power in case of an electrical overload. The circuit
breaker can be manually shut off when servicing the genera-
tor to ensure no power is coming into the boat. '
NOTE: This,circuit breaker is available as'a WESTERBEKE
aildron kit for earlier model generations; contact your
WESTERBEKE dealer.
SHIMS
..
CIRCUIT BREAKER
PART NUMBERS
15 KW -42710
,12 KW - 42709
,~~~~i~~~,~
VOLTAGE
BRIDGE RECTIFIER'
BT GENERATOR
THREE PHASE
FUSE
. . . WESTERBSKE
; [12S'nio] .
Eng/nes
&
Generators
..
'."
80
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