---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Sat 09/03/22: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 05:30 AM - Re: Ground power (GLEN MATEJCEK) ________________________________ Message 1 _____________________________________ Time: 05:30:29 AM PST US From: GLEN MATEJCEK Subject: AeroElectric-List: Re: Ground power Sorry for the late reply, but there is a significant detail about the operation of my circuit that I neglected to mention. Given that I expect that the use of external power to be an extremely rare event, the normal position of the CB is open. Prior to applying external power I will close the CB and let the circuit do its work. When done with the external power, I will open the breaker which will open the contactor. While I certainly don't advocate using a CB as a switch, this would be such a rare event it would be less wear than cycling the CBs during the annual. > > I like your circuit. It will not pop the breaker in case the aux power > polarity > is > reversed. Nothing will happen except that the red light will come on. > But the circuit does not solve the problem of the contactor remaining > energized until the aircraft battery is depleted, that is if the pilot > does not > > shut off the aux power switch. Ideally the aux contactor would drop out > when the aux power plug is removed. > > -------- > > ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message aeroelectric-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/AeroElectric-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/aeroelectric-list Browse Digests http://www.matronics.com/digest/aeroelectric-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.