2 Heavy duty "Contactors" (relays) in this configuration can be bought from
any industrial electrical supply outlet, and can be "Stacked" side by side
in this configuration to make certain that when 1 pulls in, the other
physically cannot. The exact same configuration of relays is always used in
food equipment controllers that I repair. You can used 2 separate relays,
but as a previous poster explained, safety-wise its not a really good idea.
Expect to pay between $50.00 to $75.00 for each contactor. As well,
depending on the OEM, often these contactors have removable coils, and
contact points that can be replaced only, making the repair even less
expensive (assuming that Stanley hasn't obliterated the OEM number).
Take the 2 contactors apart, under the "Stanley" cover, there may well be a
OEMs name and part number. I've had contactors that look like they come from
the dawn of time, or from a really obscure European machine, that my local
electrical supplier(Torbram Electric) can still cross reference to, and find
me a 2004 equivalent... just by the OEM number, and the coil voltage.
--
Kim..."A Man Of True Frankenstinean Proportions"


"NSM" wrote in message
news:aPvvd.23287$U47.20358@clgrps12...

"James Sweet" wrote in message
news:iJvvd.4172$N%6.261@trnddc05...

| It isn't easy to mechanically interlock relays.

| Why would you need to though? Just use multipole, double throw relays
and
| you can wire them together to do just about anything you want. I missed
the
| exact function of the original device though.

Hard experience has taught us that when a motor is operated both forward
and
in reverse, it is best to make damn sure both contactors cannot close at
the
same time no matter what. Thus the choice of a mechanical interlock system
so that even if the contacts weld closed on one side the other contactor
cannot close.

NM (Electrician)