Hobart 5359D Operation And Maintenance Manual page 131

OM 2012
*
8
1.
2.
3.
4.
5.
6.
7.
8.
V.oJtagc adjusting rheostat
Cable iength compensation rheostat
Cable s ize compensation rheas tct
On-off switch, Jine-drop compensation
Fuse (5 Amp)
Fuse h older
Damp (gain) adjusting potentiometer
Rate adjusting potentiometer
Voitage Regulator Adjustments
Figure 6
,
(dd) Apply a full 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 COUtdTERCL@CI<WJSE
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 adiustment.
Aug 25,%
(c) Miust "damp" and "rate" adjusting potentiometers (see Figure 7).
Damping adiustments are very delicate and should not be attempted unfess
the generator output average phase value varies more than 1 volt, or
output voltage is unstable. "Damp" and "rate" adiustments must be mcde
in coniunction with each other because the adiustment of one may affect
the other.
For example, improving the response by .adjusting the "damp"
potentiometer (1) may affect the stability as adjusted by the "rate"
potentiometer (2). Adjust as follows:
2-3
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