Hobart 9OC24S Operation Manual page 175

GENERATOR DIVISION
HO!3I\RT BROTHERS COMPANY
OPERATION, MAINTENANCE, AND OVERHAUL MANUAL, TM-240A
-.I~.
SELF-PROPELLED GENERATOR SET, SPEC. NO. 5381A
1. Voltage adjusting rheostat
2. Cable length compensation rheostat
3. Cable size compensation rheostat
4. On-off switch, line drop compensation
5. Fuse (5 Amp)
6. Fuse holder
7. Damp and rate adjustment potentiometers
Voltage Regulator Adjustments
Figure 6
(dd) Apply a ful I load (90 KVA, 260 A) to the generator.
Observe 'AC
voltmeter. If the voltage observed varies more than 1% (plus or
minus) from 115 V AC, adjust rheostats (2) and (3) slightly to obtain
a voltage of 115 V AC, or as close to this value as possible. Turn
knobs CLOCKWISE to INCREASE voltage and COUNTERCLOCKWISE
to DECREASE.
Turn each knob a small amount at a time to determine
which rheostat is having the most effect on output voltage and re-
quires adjustment.
(c) Adjust "damp" and "rate" potentiometers (see Figure 7).
(See 7, Fig. 6 for potentiometers location in voltage regulator.)
I
Damping adiustments are very delicate and should not be attempted'unless
the generator output average phase value varies more than 1 volt, or
output voltage is unstable. "Damp" and "rate " adjustments must be made
-_--- -_--.--... --in-con.junction~.with.each other because the.ndjustment.-of-one-may-affect-.
i act 30/73 : 2-3
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