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Contactor clicks but doesn't make elec trical contact

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jan(at)CLAVER.DEMON.CO.UK
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Posted: Thu May 09, 2013 11:00 am Post subject: Contactor clicks but doesn't make elec trical contact

Eric,



Question regarding EV200 - Would you use the short model that has the

'economizer' built in ?



Or the larger (taller) version that has no economizer ?



Jan



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Eric M. Jones

Joined: 10 Jan 2006
Posts: 565
Location: Massachusetts

Posted: Thu May 09, 2013 2:54 pm Post subject: Re: Contactor clicks but doesn't make elec trical contact

 	  Quote: 	
		  Eric, Are you saying that this is NOT the original contactor installed by Cessna Aircraft Corp. in the new, as built aircraft? 

Roger 	




I spent many hours tracking down the designers of this Stancor-White-Rogers Tyco Type-70. The only info that remains available seems to be the current specs.  The available newly produced Type-70 specs simply make it unsuitable. Will it work, Yes. Will it fail? Yes, sooner than you'd like. It is entirely possible that Cessna had a custom model. Is Cessna still using these? Possibly, but certificated a/c tend to use old original technology until it bleeds. There's no reason you should follow them.



 	  Quote: 	
		   Question regarding EV200 - Would you use the short model that has the economizer built in? Or the larger (taller) version that has no economizer ? Jan 	




Go with the economizer. The Kilovac Czonkas are made in many types. There is a marine model too that is perfectly usable. But I don't have stock in Kilovac. There are many makers of newer stuff.



For my airplane, I'll use a Flaming River Battery switch if I can and an EV200 otherwise....



ps: Guess how Kilovac and Gigavac clamp coil voltages generated from the collapsing magnetic field? That's right...bidirectional zeners.

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_________________
Eric M. Jones
www.PerihelionDesign.com
113 Brentwood Drive
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