Robin America RGX180 Service Manual page 17

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 within specitic limits. Thus. care
must be taken about brush length.
(See 9-3 BRUSHES.)
Fig. 5-5
5-2-3 BRUSHES
5-2-4 AVR (AUTOMATIC VOLTAGE REGULATOR)
The automatic voltage regulator employs an electronic cir-
cuit to automatically regulate voltage.
L
Fig. 5-6
5-2-5 VOLTMETER and PILOT LAMP
Models RGX340 and RGX21OD hav-e a voltmeter that __
comes in t\vo t>-pes: 15OV maximum tppe and 3OOV maxi-
mum type. The tl-pe of voltmeter indicates generator out-
put voltages. The generators with a generated voltage of
11OV or 13OV and dual voltage type use the 15OV msimum '
t!-pe voltmeter: and those of 22OV. 23OV and 24OV specifi-
~-::,i;--
cations use the 3OOV maximum type voltmeter.
1
300V MAX.
15OV MAX.
Model RGXISO employs a pilot lamp. The lamp hghts
:
i22OV. 23OV. 24OV)
(llOV, 12OV)
when a voltage is generated. The pilot lamp also comes in
Fig. 5-7 (1)
two types: 12% t>-pe and 3OV type. These t>-pes are
selected to suit generator output voltage.
1
J
Fig. 5- 7 (11)
- 15-