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8-l-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 15OV: Type with an output voltage of
110 or 120V
0 to 300V: Type with an output voltage of
220,230 or 240V
0 to 15OV, 0 to 330V: Dual voltage type
(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, 100A)
(3) FREQUENCY METER
Frequency range : About 45 to 65Hz
NOTE: Be careful of the frequency meter’s
input voltage range.
FOR AC
Fig. 8-2
FOR AC
Fig. 8-3
1:
ii!
j:. /i
II
b--j;.
: /-.--.
F
II
!j
r-
I i
i
Fig. 8-4
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