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5-2-3 BRUSHES
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An exciting current is supplied from the AVR to the rotor.
The brushes are made of carbon; and the brush-holders of
plastic. It is necessary to keep the contact pressure between
the brushes and slip rings withing specific limits. Thus, care
must be taken of brush length. (See
9-3 BRUSHES.)
5-2-4 AVR (AUTOMATIC VOLTAGE REGULATOR)
The automatic voltage regulator employs an electronic cir-
cuit to automatically regulate voltage.
5-2-5 VOLTMETER
The voltmeter comes in two types, a 150V maximum type
and a 300V maximum type. Type voltmeter indicates
generator output voltages. The generators with a generated
voltage of 1 lOV, 120V type and dual voltage type use the
15OV maximum type voltmeter; and those of 22OV, 23OV,
and 240V type specifications use the 300V maximum type
voltmeter.
RGX305. RGX305D
RGX405. RGX405D
RGX505, RGX505D
Fig. 5-5
RGX305, RGX305D
Fig. 5-6
RGX405, RGX405D
RGX505, RGX505D
300 V MAX.
150 V MAX.
(220 V. 230 V. 240 V)
(110 v, 120 VI
Fig. 5-7
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