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Westerbeke 16.0KW SBEGA-50HZ Specifications Page 42

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  • TROUBLESHOOTING
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SBEG
TROUBLESHOOTING
NOTE:
AC GENERATOR TROUBLESHOOTING
MUST
BE
PERFORMED WITH THE ENGINE OPERATING
AT
60
HZ
FAULT
PROBABLE
CAUSE
NO
AC
VOLTAGE
OUTPUT
AT
NO
LOAO.
RESIDUAL
VOLTAGE
PRODUCED
AT
NO
LOAD
15
-
20
VOLTS
AC.
LOW
AC
VOLTAGE
OUTPUT
AT
NO
LOAD
60
-100
VAC.
HIGH
AC
OUTPUT
VOLTAGE
150
VAC
OR
HIGHER.
UNSTABLE
VOLTAGE
OUTPUT.
AC
VOLTAGE
DROP
UNDER
LOAD
60
-
100
VOLTS
AC.
r------------.,
EXCITER
STATOR
1.
Short
or
open
in
the
main
stator
winding.
2.
Shorted
varister
on
exciter
rotor.
3.
Four
or
more
shorted
or
open
diodes
on
exciter
rotor.
1.
Blown
6
AMP
fuse
auxiliary
circuit
feed
to
AVR.
2.
Faulty
voltage
regulator
1.
Reset
voltage
potentiometer.
2.
Open
or
shorted
diodes
in
exciter
rotor
1
to
3
diodes.
3.
Faulty
voltage
regulator
1.
Faulty
voltage
regulator.
1.
STS
pod
on
regulator
needs
adjustment.
1.
Diode(s)
on
exciter
rotor
breaking
down
when
load
is
applied
(inductive)
1-3
diodes.
r-----~----------.,
RED
I I I
I I I
1
EXClnn
I
ROTOR
FIElD
I
~_~
I
ROTOR
/ + /
+
I / I
/ A I
/
6/
* /
: c
(6)
:
/ /
~_-.l
r _ /
L
_____
r
__________
J
L_
_
________
J
RED
4.
Open
in
exciter
stator
winding.
5.
Open
in
rotating
field
winding.
3.
Shorted
or
open
main
stator
auxiliary
winding.
4.
Short
in
rota
ling
field
winding.
5.
Short
in
exicter
stator.
2.
Faulty
vollage
regulalor.
®
Ul
BLUE
AUXILUARY CIRCUIT VOLTAGE
215VAC NO LOAD TO Z22VAC
FULLY LOADED
VOLTAGE
8.0VDC
NO
LOAD TO 17.0VDC FULLY LOADED
Engines & Generators
31
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