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From: Hul Tytus <ht@panix.com>
Newsgroups: sci.electronics.design,sci.electronics.components
Subject: Re: Contactors/Relays
Date: Sat, 14 Oct 2017 21:20:24 +0000 (UTC)
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Xref: csiph.com sci.electronics.design:481418 sci.electronics.components:6161

David - are the "close coil, open coil" relays the type that are opened by 
a pulse on one coil and closed by a pulse on the other?

Hul

In sci.electronics.design David Lesher <wb8foz@panix.com> wrote:
> I have futilely been seeking 100A 3ph NC/Form B relays/contactors.
> It seems they are all stashed in the "unicorn eggs" box, sigh.

> So a second design approach involves dual coil relays. The
> flavor I seek has one larger coil to close the relay, and a
> second, much lower power holding coil to keep it closed.  Of
> course, I'm not finding them either. The ones I unearth are
> "close coil, open coil" flavor.

> Anyone seen such?