Installation manual
GENERATOR
VOLTAGE
ADJUSTMENT
NOTE:
WESTERBEKE recommends that
the
following generator
tests
and
adjustments be performed
by
a quailijied technician.
NO-LOAD
VOLTAGE
ADJUSTMENT
Voltage adjustment is made with the generator regulation
being governed by the compound transformer.
1.
The selector switch,
if
installed, must be in the
COMP
position.
2.
To
confirm no-load voltage, start the generator and apply
a momentary (moderate) load to excite the transformer.
The voltage produced by the generator after the momen-
tary 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 61.5-62 hertz (232- 236 volts at
51.5-52 hertz).
NOTE:
The
no-load
voltage
should be adjusted
to
the
voltage
produced
by
the
generator once started and a momentary
load
should
be
applied
to
excite
the
transformer and then
removed.
The
voltage produced by the generator after this
momentary
load
is
removed
is
no-load voltage.
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 compound
transformer. The material used for shimming should not
soften at temperatures in the
176° F (80°
C)
range. A
small reduction in no-load voltage
(1
to 3 volts) can-some
times be accomplished by gently tapping the top
of
the ·
laminated steel bar to reduce the gap between the existing
shims and the transformer core.
NOTE:
No-load
voltage
may
be
effected needing readjustment
with
the
compound
transformer.
Do not
use
these
adjustments
to
compensate for overload conditions being
placed
on
the
generator/engine (inductive-motor type
loads).
Loss
of
generator hem/speed, the result
of
overload, will
cause
a
drop
in
voltage
output.
Shim thickness
of
0.001 inch will change the no-load
voltage by approximately 4 - 6 volts. Adding shim
material raises the no-load voltage. Removing shim
material lowers no-load voltage.
FULL-LOAD
VOLTAGE
ADJUSTMENT
The voltage hertz connection
bar
that is used when changing
from
60Hz to 50Hz can also be used to increase or decrease
the generators- full-load output.
Fine voltage adjustments can be performed by repositioning
wires
A to leads #1, #2, and #3 increasing the loaded voltage
progressively in that order. A no-load voltage adjustment
will
have to be made as well.
Should
full~load
output fall below 108 volts-60Hz
(210
volts-50Hz), the voltage should be adjusted.
A
TWO
RED
WIRES
12
STUD
6
AND
12
STUD
VOLTAGE
HERn
CONNECTION
BARS
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
regulator will sense incorrect voltage
and
cause
the
generator
to
produce abnormally high output voltage.
Engines & Generators
40