Be Generator - Westerbeke 8.0 KW-60Hz SBEG Operator's Manual

BE GENERATOR
DESCRIPTION
This generator is a four-pole, brushless, self-excited
generator which requires only the driving force of the engine
to produce AC output. The copper and laminated iron in the
exciter stator
are
respo.nsible for the self-exciting feature of
this generator. The magnetic field produced causes an AC.
voltage to
be
induced into the related excitor rotor windings
during rotation. 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.
An
AC voltage is
produced in the auxiliary windings of the main stator and
is, in tum, supplied to a voltage regnlator. The regulator
produces a DC voltage to further excite the exciter stator
windings, enabling the generator to produce a rated AC
output The voltage regulator senses AC voltage output and
adjusts DC excitation to the exciter stator winding according
to amperage load the generator is furnishing. To maintain a
constant voltage output
Voltage Adjustments
This potentiometer is used to adjust output voltage. At proper
engine operating speed the output voltage should be held at
±2%
from a no-load condition to a full rated generator output
and from power factor 1.0 with engine drive speed variations
up to -6%.
With the alternator running at no-load, at nonnal speed, and
with VOLT adjust at minimum, it is possible that output
voltage will oscillate. Slowly rotate the VOLT adjustment
clockwise. The voltage output of the alternator will increase
and stabilize_ Increase the voltage to the desired value.
CIRCUIT BREAKER
A circuit breaker is installed on all WESTERBEKE
generators. This circuit breaker will automatically disconnect
generator power in case of an electrical overload. The circuit
breaker can be manually shut off when servicing the
generator to ensure that no power is coming into the boat
~---
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------.-----~
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i
ISTATOR
I I : AC OUTPUT WINDINGS 2 I
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~-~-----------------
GENERATOR INTERNAL
WIRING DIAGRAM
- _ _ _ _ _ _ _ _ _ _ I
_______ -'- ________ J
UNUSED WIRE
AVR CONNECTIONS
60 HZ - 120 VOLTS T3: T5
60HZ - 1201240 VOLTS T2 : T4
CONTROL BOX
BAR
ADJUSTMENT
Engines & Generators
34
AUTOMATIC
VOLTAGE
REGULATOR
o
rE:J
VOLTAGE
ADJUSTMENT
WIRE COLOR CODE
T2 - YELLOW
T3 - ORANGE
T4 - LIGHT GREEN
T5 - LIGHT REO
CIRCUIT BREAKER