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 TM 55-1905-220-14-10
5-29.1. VOLTAGE REGULATOR-MAINTENANCE INSTRUCTIONS (Continued).
c.
Testing
(1) If troubleshooting tests have not corrected fault in regulator, remove unit for bench testing and conduct
tests indicated below. Replace the regulator if it fails to pass any of the tests in this section, unless
otherwise instructed.
The following equipment is needed:
(a) A 0-1 amp dc ammeter
(b) A 0-10 amp dc ammeter
(c) A 50 ohm, 100 watt resistor
NOTE
(d) A 1 ohm, 100 watt resistor
NOTE
(e) A 3500 ohm AVCR
NOTE
The AVCR may be installed and already connected.
(f) An ac voltmeter
(g) A single-phase, 50 or 60 hz, variable voltage power supply
with 1.5 amp output capability.
(h) A 0-100 volt dc voltmeter.
(2) Ground Test. With the regulator completely disconnected from the generator, ground test between
regulator terminals 3, 7 and 9 to regulator chassis with an ohmmeter or "Megger". If a ground can be
located and easily repaired, this should be done.
5-474
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