Specifications
7.6KW
BT
GENERATOR
SINGLE
PHASE
.
DESCRIPTION
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,
~nabling
th~
generator to produce
. a rated
AC
output.
INTERNAL
WIRING
FOR
12
STUD
BT
GENERATOR
Circuit
Breaker
A circuit breaker is installed on all WES1ERBEKE 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
no
AC
power
is
coming
from
the generator
to
the vessel.
NOTE:
This
circuit
breaker
is
available
as
a
WESTERBEKE
add-on
kit for
earlier
model
generations;
contact
your
WESTERBEKE
dealer.
·CIRCUIT
BREAKER
WHITEN
BREAKER
PART
NO.
42707
r-------,
r-------,
I C I I D I
AC
r-------------....,
A±
i 1 '00
8
!
:1=:
1* 43:
-
1-
2 I
I - I
L
_____________
J
G
i
~
!:
i 1
....
..--:---t1--
:
~
i!!
2
...
r-:--!1----
I I I
~F=
I .
I 3 I I 3 I WHT/ BlK
L - - - - - - J
~
L
!l-.?~!--I-
-:-
~
J
z
,_
WHT/GREEN •
~
6
T
E
5
R
9 M
1
0
I
3
N
A
2
L
7
B
8
L
0
•
C
K
@
S
T
ORANGE
+
o I
U
D
AC
aLACK
DC
-K1-
L-
__________________
~
ACr-
__
------------------------------------------~
-
,,-_oJ
YELLOW
GREEN
A.
EXCITER STATOR WINDING
A-I
Exciter Stator Windings
B. EXCITER ROTOR
and
FIELD
1.
Auxiliary Windings (A - B - C)
2.
Diodes
(6)
3. Rotating Field Windings
4.
POD
Resistor
C.
MAIN STATOR
1.
Main
Stator Windings
2.
Main
Stator Windings
3. Main Stator Auxiliary Wmdings
D.
COMPOUND TRANSFORMER
1.
Compound Transformer Windings
2. Compound Transformer Windings
3. Compound Transformer Auxiliary Windings
Resistance readings
and
voltage checks can
be
accessed
easily
for
the components in the exciter circuit
A,
G,
C-3
and
D-3
by
locating the color coded wires at the connection
points shown on the
above
schematic. When checking
winding resistance
values
be
sure
to
lift both of the
component's electrical connections.
G. BRIDGE REC'l'IF'ffiR
Engines & Generators
39