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Westerbeke 20.0KW sbeg Specifications Page 43

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  • TROUBLESHOOTING
    •
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Page view 42
SBEG
TROUBLESHOOTING
NOTE:
AC
GENERATOR TROUBLESHOOTING
MUST
BE
PERFORMED WITH THE ENGINE OPERATING
AT
60
HZ.
--
_________
~F~AU~~~J
________________________
~P~R=OB=A=B~LE~C~A=US~E~
______________
_
NO
AC
VOLTAGE
OUTPUT
AT
NO
LOAD.
1.
Short
or
open
in
the
main
stator
winding.
2.
Shorted
varister
on
exciter
rotor.
3.
Four
or
more
shorted
or
4.
Open
in
exciter
stator
winding.
5.
Open
in
rotating
field
winding.
_
_____
open
diodes
on
exciter
rotor.
-----------------------~------------------------------
N
ROESL'DUAL
VOLTAGE
PRODUCED
AT
DAD
15
-
20
VOLTS
AC.
1.
Blown
6
AMP
fuse
auxiliary
circuit
feed
to
AVR.
3.
Shorted
or
open
main
stator
auxiliary
winding.
_____________________________________
2_._F_au_I~~vO_It_a~ge_r_eg~u_la_to_r
______________________________
__
N
LOO
W
AC
VOLTAGE
OUTPUT
AT
LOAD
60
-100
VAC.
H(GHAt
1.
Reset
voltage
potentiometer.
2.
Open
or
shorted
diodes
in
exciter
rotor
1
to
3
diodes.
3.
Faul~
voltage
regulator
1.
Faul~
voltage
regulator.
4.
Short
in
rotating
field
winding.
5.
Short
in
exicter
stator.
150
VAC
8UlCH~lN.LTAGE
----~-----------------------------------------------------------
UNSTABLE
VOLTAGE
OUTPUT.
1.
STB
pod
on
regulator
needs
adjustment.
2.
Faul~
voltage
regulator.
----------------------------------------------------------------------
:~
VOLTAGE
DROP
UNDER
LOAD
- 1
00
VOLTS
AC.
1.
Oiode(s)
on
exciter
rotor
breaking
down
when
load
is
applied
(inductive)
1-3
diodes.
r-
_
----------"1
EXCITER
STATOII
r-----~----------~
I I I
I I 1
I
EXCITER
I
ROTOR
FIELD
I
-------1
RED
I
I
I
I
I
I
I
I
I
I
I
I
I
r----,
I
R01UR
I + 1
+
I 1 1
I
A 1
1
sl
ill- 1
1 I
4 I
STATOR
I 3
RED
I
I
I
I
L
: c
(6)
:
I 1
r----'
I
DIODES
1
L-----r----------~
_________
.J
®
W2
®
U1
GREEN
BLUE
AUXILLIARY CIRCUIT VOLTAGE
215VAC
NO
LOAD
TO
222VAC FULLY
LOADED
8.
0WC
NO LOAD
TO
17.0VDC FULLY LOADED
Engines & Genera/ors
31
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