Generator Frequencynoltage Changes - Westerbeke 8.0KW-60Hz Service Manual

GENERATOR FREQUENCY NOLTAGE CHANGES
NO-LOAD VOLTAGE ADJUSTMENT
Voltage adjustment is made with
the
generator regulation
being governed by the compound transformer.
,1. The sele,ctor switch, must be in the COMP position.
2; To confinn no-load voltage, start ille generator and apply
a momentary (moderate) load to excite the transformer.
The voltage produces by the generator after the
momentary load is removed is no-load voltage, Note .
the voltage output from the generators 120 volt leg(s)
(230 volt 50 hertz). the no-load voltage should be
between 121-124 volts at 60.0-60.5 hertz (232-236 volts
at 50.0-50.5 hertz).
3. To raise or lower the voltage, shims of varying thickness
(non-conductive material) are placed, or remoVed from
under the steel laminated bar on top of the cClInpouriif
transformer. The material used for shimming should not
soften at reITiperatures iu tM'176° F (80 0
C)
range. A
smaIl redilctiQR in rio-load voltage (l to
3
volts) can some
times be a"cbmplished by gently tapping the top of the
laminated'sreel bar to reduce the gap between the exist
ing shims and the transformer core.
VOLTAGEJHERTZ CONNECTION BAR
If there is no automatic voltage regulator (AVR) installed,
do not change the wiring on the VoltagelHertz Connection
Bar. Simmy reconfigyre the AC voltage connections at the
AC tenninal for the hertz
chang~
,
The blue or blue/white lead should be connected to the
Hertz terminal that the generator will be set to
~roduce.
The order of the numbered connections on some
VoltageJHertz Connection Bars may be reversed (as in the
diagrams below). To ensure a proper connection follow the
blue/white or blue lead to
the
AC tenninal block, it should
connect to the correct tenninal: stud 6(Vl} for 50 Hz, 5CW2)
, for 60 Hz. See the BT WIRING SCHEMATIC.
NOTE: When the optional voltage regulator is installed
and
if
the Blue/White (Blue) lead is not correctly positioned
to correspond to the Hertz the unit is operating at, the regu-
lator
will
sense incorrect voltage and cause the generator to
produce abnormally high putput voltage.
CURRENT MODELS
VOLTAGE/IIERTZ CONNECTION BAR '
(REPOSITiON THIS WiRE
FOR 50Hz)
EARLY MODELS
'YELLOWIWHITE
N
~. ~C;;;:~~
::::;;;;"0:::::::::;;;' ,
:::~:::2~(
L1230V 50Hz
6 5 4 4
B
,
N~:::~:::::j~H1120V60HZ
6 5 4 " 8
u~=~=~
N . . . ' - '
• L2 240V 60Hz
Terminal Block Wiring Connections
Wiring connections needed to obtain proper voltage and fre-
quency are illustrated in the diagrams above.
NOTE: Connections 1 and 4 are located
o~
two red terminals
below the compound transformer.
/ , RED/wHITE '
'"
'
.
" RED/WHITE
BLUE
... WESTERBEKE
Engines & Generators
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