Re: (ET) Reverse Relay

[Michael S Briggs <msbriggs alberti unh edu>]

Dave,
	Where did you find the socket to put the relay in? That would be 
VERY convenient. I assume you can just connect the spade connectors to the 
socket, so if you *do* need to change a relay, you don't have to deal with 
unplugging and keeping track of all the wires, just plug the new relay 
into the socket?
        What current rating fuse did you put in?
	Hmmmm.... perhaps a circuit breaker would be nice there too 
instead of a fuse....

Thanks,
Mike
--

--------------------------------------------------------------
Michael S. Briggs
UNH Physics Department
(603) 862-2828
---------------------------------------------------------------

On Tue, 1 Aug 2006, Dave & Deb wrote:

> this is a pretty common problem.  after my second relay welded itself I 
> put an
> inline fuse in to protect the relay and then just for good measure and 
> because I
> found some that would work and were cheap bought a socket for the relay 
> and 6
> relays.  needless to say I never welded another relay after that.
>
> the relays I bought for 2.50 each from hosfelt.com
>
> dave
>
>
>
> > Ok,
> >         Now that I figured out how all the connections are made to the
> > relay (it is a different style than the original one, so the connections
> > are not the same as in the manual - that's what was screwing me up, since
> > the way it's supposed to connect in the manual (as far as which poles
> > connect when) isn't the same as this relay is supposed to work). At any
> > rate, I've now verified that the relay is in fact blown - one of the
> > contacts that moves when the relay is activated is welded together, so
> > effectively the field current is able to bypass the field coil when in
> > forward. Ok, so hopefully those relays I ordered last week will be here
> > soon. :)
> >
> > Thanks for the help everyone,
> > Mike
> >
> > --
> >
> > --------------------------------------------------------------
> > Michael S. Briggs
> > UNH Physics Department
> > (603) 862-2828
> > ---------------------------------------------------------------
> >
> > On Tue, 1 Aug 2006, Michael S Briggs wrote:
> >
> > > Duh, just answered my own question - the extra two connections on the
> > > bottom must be for the power to control the relay. :)
> > >         Ok, so that answers that. But, the wires aren't connected to the
> > > relay in the way the schematic shows (i.e. ignoring the bottom ones that
> > > are for powering the relay, the middle (of the three in the manual) on the
> > > right is supposed to have wire 10 connected - but my wire 10 is connected
> > > to the bottom one on the right (not counting the real bottom ones, which
> > > power the relay). So, either something is wired wrong (but it *was*
> > > working, so I'll assume that's not the case), or this is a non-original
> > > style of relay that has the connections different from in the service
> > > manual. If that's the case, I need to figure out where the wires are
> > > connected to this one, and how it's *supposed* to work.
> > >
> > > Mike
> >
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