nuckolls.bob(at)cox.net
Guest
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 Posted: Sat Mar 22, 2008 6:56 am Post subject: Plane Power Alternator Failure (brand new) |
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INnn
At 11:18 PM 3/21/2008 -0700, you wrote:
| Quote: | Gentlemen all, you are gussing.
Call PP & send it back. Get the real reason. PP does modify the
regulator & therefore he's the source of creditable facts. I can say
a stock ND should not get hot with BAT/ALT on, but I stand to
be corrected. I never tried it. However............
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I can't imagine that ND would not take advantage of the
practice for monitoring rotor motion and shutting down
field current if the engine is stopped.
| Quote: | For a regular internally regulated ND alternator, if it uses more than
50 millivolts, with the engine shut down you have voltage regulator or
diode issue. Internally regulated alternators do not have a FIELD
WIRE of course.
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Plane-Power's offerings that include the externally mounted
crowbar ov protection have been modified to bring the
internal regulator's b-lead feed out side so that one may
effectively shut down the alternator from outside. Normally,
this does not require modification of the regulator itself
(difficult to do . . . it's a hybrid device and usually sealed
up). It does require that you open the b-lead feeder to the
regulator and bring it outside (relatively easy). We were
offered this information by Mr. Steve Klodd at Plain-Power
just over a year ago. See:
http://www.aeroelectric.com/Mfgr_Data/Alternators/Plane_Power/70129A_Plane-Power_SKlodd.pdf
| Quote: |
>From: Ken <<mailto:klehman(at)albedo.net>klehman(at)albedo.net>
>Subject: Re: Plane Power Alternator Failure (brand
new)
>Would not surprise me Vern. My wee ND IR alternator draws a couple of
>amps and heats up quite noticeably with the engine off and the IGN
>terminal (and B+ lead) connected to the battery. Fortunately the OV
>relay lets me disconnect it by opening the alternator control switch.
>Ken
Ken is it possible you are reading more than the alternator? Master contactor?
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I presume that the internal regulator would still be expected
to shut the field down if no rotation were sensed. I'll drop
a note to Steve requesting clarification.
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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