Return-Path: Received: from hpamgaad.compuserve.com ([149.174.217.158]) by truman.olsusa.com (Post.Office MTA v3.5.1 release 219 ID# 0-52269U2500L250S0V35) with ESMTP id com for ; Fri, 23 Jul 1999 11:17:05 -0400 Received: (from mailgate@localhost) by hpamgaad.compuserve.com (8.8.8/8.8.8/HP-1.5) id LAA00674 for lancair.list@olsusa.com; Fri, 23 Jul 1999 11:20:25 -0400 (EDT) Date: Fri, 23 Jul 1999 11:19:55 -0400 From: Lynda Frantz Subject: relay trouble shooting Sender: Lynda Frantz To: "INTERNET:lancair.list@olsusa.com" Message-ID: <199907231120_MC2-7E08-BB71@compuserve.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Disposition: inline X-Mailing-List: lancair.list@olsusa.com <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> << Lancair Builders' Mail List >> <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> >> Message text written by INTERNET:lancair.list@olsusa.com > For whatever reason, I'm somewhat insensitive to pain (big grin), but this critter is too hot for me to touch. Have any of you fondled your master relay lately? Any feedback would be appreciated.< Check the current going through the coil of your relay. It should be about 1 amp. If the coil current is OK then check the voltage drop across the contacts under load. The voltage drop should be minimal. Perhaps the contacts of your relay have developed some extra resistance and thus the reason for all the heat. I would replace the relay regardless! They are relatively inexpensive. 1 ampere through the coil at 14 volts is 14 watts of heat which is not enough to heat up the relay to the temps you indicate. An aircraft draw of 50 amps through a poor relay contact with a voltage drop of 2V across the contact is 100 watts. Now that will get the sucker hot! Jim Frantz Lancair Network News >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> LML homepage: http://www.olsusa.com/Users/Mkaye/maillist.html