The Be Generator - Westerbeke 20.0 BEDA Operator's Manual

THE BE GENERATOR
SINGLE AND THREE PHASE
DESCRIPTION
This generator is a four-IIDle, brushless, self-exdted genera-
tor 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 excitor rotor windings during
rotation. Diodes located in the exciter rotor rectify this volt-
age to IX; 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 regulator. The regulator produces a DC voltage
to further excite the exciter stator windings, enabling the gen-
erator 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 gener-
ator is furnishing. To maintain a constant voltage output.
INTERNAL WIRING SCHEMATIC
CIRCUIT BREAKER
A circuit breaker is installed on
all
WESTERBEKE genera-
tors. 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 that no power is coming into the boat.
NOTE:
This circuit breaker is available as a WESTERBEKE
add-on kit for earlier model generators; contact your WEST-
ERBEKE dealer.
3 PHASE TWELVE WIRE RECONNECTABLE
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EXCITER
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CIRCUIT BREAKER
PART NUMBERS
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A
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B
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J
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ROTOR
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:
:
: 190
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0
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28 KW- 60Hz NO. 42701
[16 KW- 50 Hz NO. 427181
1
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1
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Block
c:
6 : :
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2
25 KW..:. 60 Hz NO. 42712
[28 KW-
58
Hz NO.
427111
32 KW- 60Hz NO. 42703
[25 KW -50 Hz NO. T D 81
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L.
REGULATOR
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6.3AMP
1-.v-IWESTERBEKE
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Engines & Generators
34
I
A. EXCITOR
1. Exciter Stator Windings
B. ROTOR
1. Auxiliary Windings a.b.c.
2.Diodes
3. Main Rotor Windings
4. Pozi Resistor
C. MAIN STATOR
1. Auxiliary Windings
2. - 7 Main Stator Windings
3. Auxiliary Windings
(AC to Regulator)
D. AC TERMINAL BOARD
E. REGULATOR