8-l-2 INSTRUMENTS
I
(1) VOLTMETER
AC voltmeter is necessary. The approximate
AC voltage ranges of the voltmeters to be
i
used for various types of generators are as
follows:
0 to 150V: Type with an output voltage of
’
110 or 12OV
0 to 300V: Type with an output voltage of
220,230 or 240V
0 to 15OV, 0 to 330V: Dual voltage type
For AC
Fig. 8-2
(2) AMMETERS
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 lOA, 20A, 1OOA)
For AC
-
1
Fig. 8-3
(3) FREQUENCY METER
Frequency range : About 45 to 65Hz
NOTE: Be careful of the frequency meter’s
input voltage range.
Fig. 8-4
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