Westerbeke 8.0KW-60Hz Service Manual page 64

COLISEUM GENERATOR
'\ MAIN STATOR WINDINGS
) mOUBLESHOOTING
)
)
Very low or no AC voltage oUlput is an indication of a
shorted
or open
main
stator. To detennine if it is a short or
open, excite the generator with 12VDC across the F+ and F-
leads lifted off the voltage regulator with the unit running.
If a
short
exists the excitation will produce a load on the
. drive engine. A growling noise will be produced by the AC
generator. The
short
will produce heat affecting the windings
adjacent to it and smoke may be produced.
If a short is not found but rather an open is indicated, the two
main stator windings will have to be electrically isolated and
the windings checked with an ohm meter. Test between VI2
and VI for an open circuit or check for an open between V22
andV2.
INTERNAL WIRING DIAGRAM
~---
- - - - ----------GENERATOR - - - - - - . - - - - - -
iEJ(CITERr---- --ROTOR--~
r -
------STATOR·-,
i
o
I
I I I '
,STAtOR
I
i
I
AC OUTPUT WINDINGS 2 :
I AUTOMATIC
I
+ : /. :
9
3
+
I
i '
~:~
VOLTAGE
. I I I I
0
REGULATOR
I
c
3-
I
I AC OUTPUT WINDINGS 1 I
II
- L _________
J
1_ _ __________
..J
,~~~ ;g~~~~~d::
.
- - - - - - - - - - - - - - - - - - - ________________ 1
~~~E~~~NJiRc; ~::
~~ \~:~~EJ
F-
D
VOLTAGE
~
,
~
ADJUSTMENT
0
'----IU1
L----iU2
AVR CONNECTIONS """ ----
60 Hz -12D/240V_U1 V11
60 Hz -120V _ _ U1 V11
50 Hz - 230V _ _ U1 V12
RESISTANCE VALUES (IN OHMS)
WESTERBEKE
GENERATORS 8.0Kw
10.0Kw 12.5Kw 15.0Kw
Excller Slalor 23.5 25.1 25.5
26.6
MainStalor
V22
to
U2 0.3 0.3 0.4 0.4
V12
to
U1 0.3 0.3
0.4 0.4
Exciler Rolor
A
to
B 1.2 0.6 0.6 0.4
B
to
C 1.2 0.6 0.6 0.4
CtoA
1.2
0.6
0.6 0.4
RolorF/sld 2.2 2.4 2.8 3.0
Suprsssor
NO RESISTANCE
EnQ/nes & Generators
56
o