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Relays 'G's" skunk stink (CORRECTION)

 
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nuckollsr(at)cox.net
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PostPosted: Tue Oct 03, 2006 3:58 am    Post subject: Relays 'G's" skunk stink (CORRECTION) Reply with quote

At 11:12 PM 10/2/2006 -0500, you wrote:


<nuckollsr(at)cox.net>

At 10:59 AM 10/2/2006 -0500, you wrote:



Anybody have a centrifuge with accelerometer and want to conduct a little
experiment?

Dave Morris

I've done this already . . . but the rationale for mounting
the contactor in any particular orientation has yet to be
supported by the underlying simple-ideas.

Yes, that's what the data sheet says but fails to explain
why. An there's a famous Tyco white paper that makes some
perfectly good measurements from which the authors then
infer but never demonstrate deleterious effects that
are not driven by the same science.

There IS a reason why mounting the contactor under
discussion cap down is a good idea and we've already
hat-danced around it . . . and it's NOT for consideration
of g-forces.

Bob . . .


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wjoke(at)shaw.ca
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PostPosted: Tue Oct 03, 2006 6:49 am    Post subject: Relays 'G's" skunk stink (CORRECTION) Reply with quote

I'll take a stab. Mounting "cap down" means that gravity (and a bit of
engine vibration) will separate the main current contacts after the coil
is de-energized should the internal compression spring fail. Mounting
the other way would have the contacts potentially closing due gravity if
the spring failed with potential for all sorts of unhappy results.

Thanks to Bob for the nice internal pictures of this style of contactor.
(I seem to have several of them in use personally).

Jim Oke
Wpg., MB
RV-6A & RV-3


Robert L. Nuckolls, III wrote:
Quote:

<nuckollsr(at)cox.net>

At 11:12 PM 10/2/2006 -0500, you wrote:


<nuckollsr(at)cox.net>

At 10:59 AM 10/2/2006 -0500, you wrote:


<N6030X(at)DaveMorris.com>

Anybody have a centrifuge with accelerometer and want to conduct a
little experiment?

Dave Morris

I've done this already . . . but the rationale for mounting
the contactor in any particular orientation has yet to be
supported by the underlying simple-ideas.

Yes, that's what the data sheet says but fails to explain
why. An there's a famous Tyco white paper that makes some
perfectly good measurements from which the authors then
infer but never demonstrate deleterious effects that
are not driven by the same science.

There IS a reason why mounting the contactor under
discussion cap down is a good idea and we've already
hat-danced around it . . . and it's NOT for consideration
of g-forces.

Bob . . .



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Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

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