Westerbeke 4.5 BCG - BC Generator Single Phase Voltage Adjustment; Single Exciter No-Load Voltage Adjustment

BC.GENERATOR SINGLE PHASE
NOTE: lvEsTERBEKE ~ommends thatw following generator tests
and adjus~ be performed by a qtliJlt/ifid techriicirin..
SINGLE EXCITER HO-LOAD VOLTAGE ADJUSTMENT __________ ;.....__ ____ _
i. Remove tl_le louvered metal plate, at the back of the
generator, covering the AC terminal conD.eetions and
the capacitor(s). · ·
1. Start the generator an4 aU()W it «J run for apprpximately
five minutes so the engine can warm up.Make sure the ·
generatOr is opetating without any equipment dra\\fing ~
current from the generator (that is, shut off an electrical
appliances). Make srire the engine'~ speed (Hertz) is
correct Adjust the fuel tbrottle/speecMinkag~aS needed to
obtain the correct engine speed before prOOeeding. ·
3. Referring to the AC loa4 connections diagram below,
checkthegenetator'sno-Ioad \loltage by measuring the
wltage across the neutral lead and the hot lead with a volt
meter. Make sure you record this reading. The generator's
no-load \IOltllge is 115 - 124 volts at 60.5 - 6LS Hertz. If
the voltage output is higher or lower than specified,
proceed.
® @
23DV/50Hz
fr GRoUNDED TO THE
INSIDEOl"THE
GENERATOR CASE
4. Shut off the generator. Make sure the correct Hertz lead
(60 Hertz #6, or 50 Hertz #S) is pttlgged into the
· capacitor(s).
AWARNINQ: CapaoHor.t m-'.1'tl dl#hliflllld before
handlllig asthBystare 6/ectr/olty alid can plak a paten·
tlill/y lstha/· charge even when dlsconneated tram thtllr
power sourae~
NOTE: Simply cross the capacitor's two tennint'.lls with an
insulated (plastic handle) screwdriver. This will discharge
any·excess electricity.
A WARfllNG: /lo not attsmpt to,maks a no-load volt-
age ild/:uililentWblle the genetatar Is operating. The
capao/tou:an pnlituae a 480-500 volt charge. Jquahlng
any wiring can produn a severe elecfl/cal shack. In
addition, attempting to lllake a no-load voltage ad/ust·
at While the/Jeneratar Is O/llfStlng could cause your
fingers ta be caught In the generator's rotor.
5. There are three plugs grouped for the right capacitor ter-
minal, #!7, #8, and#9. If the generator's no-load voltage is
low, then disconnect the lower numbered plug and con-
nect the plug with the next higher number. If the genera-
tor's no-load voltage is high, then disconnect the higher
numbered plug and connect the plug with the next lower
number. Note that the plug presently connected to this
terminal may be any_ one of"tbe three plugs available.
6. ·If the generator's no-load voltage cannot be adjusted
because the voltage needs to be increased and the highest
numbered plug is already connected to the right terminal,
or the vpltage-needs to be lowered and the lowest num-
bered p1ug is cbnnected, refer to the WES1ERBEKE BC
Oenetator Troublesh_o?!iit~ Guide).
A WARNING: Maire certain the lnsalatlng.covers an.
ths unasell leads are In plaae and are NOT In contact
With nab other or In contact with the generator's
housing.
NOTE: THE #1 WIRE JS
SHOWN CONNECTED AS A
DEMONSTRATION OF HOW
THESt CONNECTIONS CAN
BE MADE.
5 BCD GENEM. . il'OR BACK END SHOWN
. 120V/60Hz
...
t'ERWNAL ·BLOCK
\
SINGLE EXCITER CIRCUIT
See the BNCHNE ADJUSTMENT section in this manual for
ADJUSTING THE ENGJNE SPEED.
Engines & Generators
37