Component Testing and Adjustment 7-7TP-5648 8/93
Voltage Regulator
Adjustment
The PowerBoostä V voltage regulator monitors
generator output to control current flow to the generator
field. PowerBoostä V maintains generator output under
load until the generator enginespeed drops to apre-set
level (factory setting 57.5 Hz on 60 Hz models and 47.5
Hz on 50 Hz models). At this point (under factory
settings) the regulator allows generator voltage and
current to drop to a levelsufficient to handle load.When
the generator speed returns to normal (60 Hz or 50 Hz)
as load is accepted, generator output also returns to
normal. The voltage regulator is factory set for proper
generator operation under a variety of load conditions.
Under normal circumstances, no further adjustment is
necessary. However, if the regulator is replaced, has
been tampered with,or voltage/frequency reconnection
has been done, readjust according to the following
procedure. Voltage regulator components are identified
in Figure 7-5 and Figure 7-6 and described in the
following paragraphs.
66 55
1 2 4 3 B1
B2
Exciter Armature
Exciter Field
Main Field
Stator Windings
Rectifier
Module
AC
- +
AC
FN
FP
V1
V4
VOLTSV/HZ
STAB
PowerBoostä V Voltage Regulator
Sensing Leads
(208-240 Volts nominal)
Voltage
Regulator Power
Supply Leads
Figure 7-5. PowerBoostä V Voltage Regulator
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