Installation manual

BT GENERATOR
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 feature 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.
AC TERMINAL BOARD
AC
TERMINAL
BOARD
(12 STUD)
BRIDGE
RECTIFIER
A circuit breaker is installed on all WES1ERBEKE genera-
tOJS. This circuit breaker 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 corning into the boat.
NOTE: This circuit breaker is available as a WESTERBEKE
add-on kit
for earlier model generations; contact your
WESTERBEKE dealer.
SHIMS
BT GENERATOR
SINGLE PHASE
[6 STUD]
BT GENERATOR
SINGLE PHASE
[12 STUD]
COMPOUND
TRANSFORMER
Engines & Generatqrs
37