From: RWolf99@aol.com
Message-ID: <17.1689c4c7.28469d84@aol.com>
Date: Wed, 30 May 2001 15:01:24 EDT
Subject: Re: hydraulic pump circuit breaker LNC2
To: lancair.list@olsusa.com
MIME-Version: 1.0
Content-Type: text/plain; charset="US-ASCII"
Content-Transfer-Encoding: 7bit
Reply-To: lancair.list@olsusa.com

          <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>>
          <<  Lancair Builders' Mail List  >>
          <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> 
>>
In a message dated 5/29/2001 9:49:53 PM Pacific Daylight Time, 
lancair.list@olsusa.com writes:

<< Any breaker point can hang leaving the pump running which will fill the
 cockpit with smoke, this causes a situatuation that is much less esthetic
 than an extra switch/breaker.  Ask Don Goetz.>>

Excuse me.  Are we now saying that we have to protect against simultaneous 
equipment failures AND failure of the associated circuit breaker?  That's a 
new one on me.  Oh, well.  If the circuit breaker fails ON and the pump is 
somehow running, I'll just unscrew the fuse holder and withdraw the fuse, 
cutting power to the pump relays.

Then I'll reach over, fan the smoke out of Don's eyes, and say "Was it like 
this the last time?"

No offense intended, but the breaker is supposed to be our defense against 
electrical equipment failures (actually, our defense against wiring failure, 
but we use them to shut off runaway electrical systems).  As I understand it, 
most failure analyses assume that the breaker is an independent system from 
the circuit it's protecting and that simultaneous failure is highly unlikely.

- Rob Wolf
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
LML website:   http://www.olsusa.com/Users/Mkaye/maillist.html
LML Builders' Bookstore:   http://www.buildersbooks.com/lancair

Please send your photos and drawings to marvkaye@olsusa.com.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>