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SD8 Alternator Install - Z-12 vs. Manual

 
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nuckollsr(at)cox.net
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PostPosted: Fri Feb 24, 2006 9:24 am    Post subject: SD8 Alternator Install - Z-12 vs. Manual Reply with quote

At 10:31 AM 2/24/2006 -0500, you wrote:

Quote:

<sjhdcl(at)kingston.net>

I thought the point in having the warning light for the aux alternator is
tell you it is overloaded and
equipment needs to be turned off??

That's a special feature that is built into B&C's regulators for the
SD-20 only when used as aux alternators. These regulators are fitted with
a current sensor. See:

http://aeroelectric.com/articles/Rev11/AppZ_R11E.pdf

. . . latest revision to Z-12 where the SD-20 is controlled by
an SB-1 regulator.

This is an excellent example of how you need to UNDERSTAND exactly
what is meant by "warning light" and exactly what functions come
with it.

I'm doing an article on the MC33092A voltage regulator chip mentioned
by Jon earlier this week. A careful analysis of the regulator's
functionality
yields some interesting things about how the warning light works, what
it means, and whether or not the chip is suited for use in our airplanes
to meed certain design goals.

A wire coming out of a black box to drive a "warning light" tells
you nothing about the functionality of the light. This must be gleaned
from more detailed data as to how the lamp driver works . . . as will
be illustrated for the MC33092.

Bob . . .


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