nuckolls.bob(at)aeroelect
Guest
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 Posted: Wed Feb 03, 2010 6:07 am Post subject: Alternator over current protection? |
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| Quote: | The schematics are not clear to me for the overcurrent circuit for
the alternator. What do I need to supply that protection. I have
and reviewed your cd.
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Unlike generators that had over current or
over load protection built into their regulators,
alternators are inherently self-limited to
the amount of output current. They are
incapable of destroying themselves due
to drains that exceed nameplate ratings.
This assumes of course that they are
adequately cooled. In other words, if
the alternator is installed and fitted with
conditions that allow continuous operation
at full rated output, then having them
operate in current limited mode (10-15%
above nameplate) does not represent a
hazardous condition.
Alternator b-lead conductors in airplanes
have traditionally been protected by either
a fat breaker on the panel or (in the case
of Z-figures) some form of robust fusing
on the firewall. This "fuse" is depicted
as an ANL style device usually located
right next to the starter contactor.
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