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From: Joey <"joeyga"@hotmail.com>
Subject: Re: Overvoltage Schematic Wanted
Date: Sat, 14 Sep 2002 23:31:42 -0400
Organization: Posted via Supernews, http://www.supernews.com
X-Mailer: Mozilla 4.72 [en] (Win98; I)
Thanks to all who have replyed to my posting about the OVP circuit but I'm
looking for the schematic that does not use a relay and not the crowbar type
opens the breaker. The circuit is used in the older Cessna aircraft and is
in a metal cylinder. When the voltage gets to about 16V at the input the
voltage drops to zero until reset by killing the input voltage. The third
wire to this
circuit is the ground wire. I know this has got to be simple but I haven't
schematic anywhere yet. Please keep me in mind if you see one and many
to all who have responded so far here. THANKS.
> I'm looking for an overvoltage schematic that meets the following
> criteria. If anyone
> has one I would appreciate a copy and be willing to pay any expense if
> My email is firstname.lastname@example.org
> 1. For a 12 volt circuit that would trip at about 16 volts
> 2. Does not use any relays
> 3. Has three wires to device, one + in, one ground, and one + out.
> 4. If the + in exceeds the set voltage then there is no output.
> 5. Input must be cut off and back on to reset
> Such a device is used on aircraft to cut off voltage to the alternator
> should it
> fail and normal voltage exceeded. I've seen the clam shell type and the
> type but never a schematic for the type I've mentioned above. ANY help
> will be greatly appreciated. Thanks.
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