Specifications

VOLTAGE REGULATOR ADJUSTMENTS
Description
The voltage regulator is an advanced design which ensures
optimum
AC alternator performance. It is equipped with
complete protection circuitry to guard against operating
conditions that could be detrimental
to the AC alternator.
Volts
!i.a BUS FUSE
PROTECTS THE REGULATOR BOARD
FROM AN ELECTRICAL OVERLOAD
1111s potentiometer is used to adjust output voltage. At proper
engine operating speed
the output voltage should be held at
±1 % from a no-load condition to a full rated generator output
and
from power factor 1.0 0.8 with engine drive speed
variations
up to -6%. Prior to starting the engine, turn the
VOLT and STAB trimmers (using a mini phillips screw-
driver) fully
in a counter clockwise (Minimum) direction
until you feel them hit their stops. Turn
the AMP and HERTZ
trimmers completely clockwise (Maximum) in the same
manner. With the generator running at no-load, at normal
speed, and with
VOLT adjust at minimum, it is possible that
output voltage will oscillate. Slowly rotate
the VOLT
adjust clockwise. The voltage output of the alternator will
increase and stabilize. Increase the voltage
to the desired
value. In
this situation, only the green LED will stay lit.
~ Hertz
~ Jlinp
E Slab
~ Volt
...
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VOLTAGE REGULATOR DIAGRAM
Stability
This potentiometer permits variation of the regulator's
response
to generator load changes so as to limit
overcompensation
and obtain a minimum recovery time to
the normal voltage output.
In order
to adjust the regulator stability the alternator must be
running at no-load and the output must be monitored.
Turn
the STAB adjust slowly clockwise until the voltage
starts
to fluctuate. At this point rotate the STAB adjust
counterclockwise until the voltage
is stable within 1 or 2
tenths of a volt.
Amp-Hertz .
These two adjustments are used in conjunction with the two
protection circuits in the voltage regulator that are indicated
by the illumination of a colored
LED lights.
1. Delayed overload protection (yellow LED).
2. Low speed protection (red LED).
Both systems have an intervention threshold which can
be
adjusted using the respective potentiometer. Each of the two
circuits are able to cause an adequate reduction in excitor
voltage
to safeguard the excitor windings and prevent their
overheating.
The overload protection system has a delay which permits
temporary overloading of the generator during times such
as
motor start-up or other similar load surge demands. The
regulator also has a third LED (green), that glows during
generator operation to indicate
con-ect operation of the
regulator with the generator.
Engines & Generators
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