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8-1-2 INSTRUMENTS
(1) VOLTMETER
AC voltmeter is necessary. The approximate
AC voltage ranges of the voltmeters to be used
for various types of generators are as follows:
0 to 150V : Type with an output voltage of 110
or 120V
0 to 300V : Type with an output voltage of 220,
230 or 240V
0 to 150V, 0 to 330V : Dual voltage type
(2) AMMETER
AC ammeter is necessary. An AC ammeter
with a range that can be changed according
to the current rating of a given generator is
most desirable. (About 10A, 20A, 100A)
(3) FREQUENCY METER
Frequency range : About 45 to 65Hz
NOTE : Be careful of the frequency meter’s input
voltage range.
Fig. 8-2
Fig. 8-3
Fig. 8-4