Mailing List lml@lancaironline.net Message #68222
From: Colyn Case <colyncase@earthlink.net>
Subject: Re: [LML] Re: A couple Tyco papers on emf reduction in relays
Date: Tue, 26 Nov 2013 09:38:42 -0500
To: Lancair Mailing List <lml@lancaironline.net>
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Very cool.  Gigavac has some new and better stuff according to Eric Jones.

On Nov 26, 2013, at 8:41 AM, Mark Sletten wrote:

Here's an interesting (and recent) discussion on the relative virtues of solid state and mechanical contactors:


--Mark


On Tue, Nov 26, 2013 at 1:55 AM, Colyn Case <colyncase@earthlink.net> wrote:
...and here is the link to the kilovac catalog.  Even if you don't buy them, it's a good reference for what to look for.


On Nov 26, 2013, at 2:37 AM, Colyn Case wrote:

links have changed.   see below:

On Nov 25, 2013, at 9:06 PM, Colyn Case wrote:

I just stumbled across these while researching something else.

Recently there have been some references to how to protect switch circuits connected to relays.  Here are two papers done by Tyco which have been corroborated by certain others and are consistent with Eric Jones' recommended use of Snapjacks (bi-directional zener diodes).

Some methods (not recommended here) of protecting the switch contact result in extending the opening time of the relay, which causes arcing, bouncing and degeneration of the relay contacts.  (not a good thing for maximizing starter current).

If you are going to do something in this department, I highly recommend reading these.  (or just use EV100 relays and be done with it)



Here is also some info from Eric's website:








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