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johnt(at)comp-sol.com
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 Posted: Thu Jan 24, 2008 12:27 pm Post subject: Low Volt Warning breaker |
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Just curious why there is a breaker for the Low Volt OV sense - on the LR3C regulator - Z13 - and not just combined with the ALT field breaker?
Tks.
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klehman(at)albedo.net
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| Posted: Thu Jan 24, 2008 3:56 pm Post subject: Low Volt Warning breaker |
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If the ALT breaker pops (and it will in milliseconds in an OV situation)
wouldn't that also kill the low voltage warning and defeat the purpose
of it?
Ken
John Tvedte wrote:
| Quote: |
Just curious why there is a breaker for the Low Volt OV sense - on the LR3C regulator - Z13 - and not just combined with the ALT field breaker?
Tks.
|
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nuckolls.bob(at)cox.net
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| Posted: Sat Jan 26, 2008 2:00 pm Post subject: Low Volt Warning breaker |
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At 02:23 PM 1/24/2008 -0600, you wrote:
| Quote: |
Just curious why there is a breaker for the Low Volt OV sense - on the
LR3C regulator - Z13 - and not just combined with the ALT field breaker?
|
Because the B&C devices are not just "regulators" . . . they
contain OV protection, alternator regulation AND LV Warning.
Further, these regulators conform to design goals that have
become pretty much standard over the last 20+ years: DON'T
MAKE FIELD SUPPLY AND VOLTAGE SENSE LINES TO THE BUS SHARE
A COMMON CONDUCTOR. This is called, "remote sensing for
voltage regulation".
This prevents the very common ammeter oscillation
phenomenon common in many light aircraft of yesteryear.
It also insures that the LV warning system stays
operational even if the alternator has been taken off
line manually or by reason of an OV condition.
Bob . . .
----------------------------------------)
( . . . a long habit of not thinking )
( a thing wrong, gives it a superficial )
( appearance of being right . . . )
( )
( -Thomas Paine 1776- )
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