Westerbeke 12.5 BTDA - Generator Frequency Adjustment Steps; AC Voltage Connections (6 & 12 Stud)

GENERATOR VOLTAG~ ADJUSTMENT
NOTE:. WESTERBEKE recommends that the following generator
tests and adjustments be performed by a quailijied technician.
Generator Frequency
I. Frequency is a direct result of engine/generator speed:
1800 rpm = 60 hertz
1500 rpm = 50 hertz.
2. To change generator frequency follow the sfeps below.
a. Connect the AC output leads to the AC tel111ina1 block,
following the illustrations on this page.
b. If an AVR is installed, reposition the blue or blue/white
lead to correspond to the hertz selected on the
Voltage/Hertz Connection Bar.
If there is no automatic voltage regulator (AVR
installed, do not change the wiring on the
Voltage/Hertz Connection Ba& Simply reconfigure the
AC terminal for the hertz change.
c. Start the engine, monitor voltage and adjust engine
no-load speed. Adjust diesel units by the linkage
between the throttle arm and fuel solenoid or the
throttle lever on the injection pump ..
60 hertz! no-load speed, 61.5 - 62.0 hertz.
50 hem! no-load speed, 51.5 - 52.0 hertz.
d. After the no-load hertz adjustment is made, the no-load
voltage may need to be readjusted: In most cases, if the
generator was producing the correct no-load voltage at
the previous hertz setting, it would be correct at tli.e
changed hertz setting.
In the event it needs adjustment, adjust the shim thick-
ness under the laminated steel bar of the transformer.
60 hertz: no-load voltage), 121-124 volt$.
50 hertz: no-load voltage, 232~236 volt$.
e. Load the generator to the rated amperage output
corresponding to the hertz speed of the generator.
Rated Loaded Speed
60 hertz: loaded speed, 58.5- 59.0 hertz
50 hertz: loaded speed, ·48.5 - 49.0 hertz
The lowest acceptable voltage at full rated output
(amps)
60 hertz: 108 - 110 volts
50 hertz: 205-210 volts
SIX STUD AC VOLTAGE CONNECTIONS
115V50Hz
~ @
The frame ground wire must
lie moved when changing
from 115 volts and 110/220
volts 50 hertz to 230 volts
50 hertt; From making con-
nections to the AC; lermlnal
block, use terminal ends for .
1!41nch studs that will
accept muiH·strand copper
wire sized for the amperage
rating from the hot lead con-
necl!on. The frame ground
wire is whfte or white with a
· green strip. It connects
between the neutml stud
and the genemtor fmme.
230V50Hz
·® ®
120V 60HZ
TWELVE STUD AC VOLTAGE CONNECTIONS
115V50Hz
o=:D o·
6 g
N
CIRCUIT
l!;!~•dJ BREAKER
230V50Hz
o=:D 0
.o 6 g
5 ~
N L1
f!Cl
••I
120Y 60Hz.
0 a;::::o
)tJUMPERIS
R_EQUIRED
Engines & Generator~;
.41
•
120J240V/60Hz
l1
l2