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Re: Contactor questions

You wrote: 
>
>>From SROYS-at-radiology.ab.umd.edu Mon Oct 16 08:44 MDT 1995
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>To: tesla-at-grendel.objinc-dot-com
>From: "SROYS"  <SROYS-at-radiology.ab.umd.edu>
>Date:         Mon, 16 Oct 1995 10:01:33 EDT
>Subject:      Contactor questions
>
>I just bought a couple of 3-phase, 3-pole, open-type AC reversing 
motor 
>contactors at a hamfest yesterday and I have some questions. The box 
>says that the contactor is rated for 27A continuous use.  Since each 
>contactor has two relays and each relay has three contacts, does this 
>mean that I could wire everything up in parallel and be good to go for 
>up to 3 * 2 * 27A, or is the 27A rating for each relay rather than 
each 
>contact?


    Yes.

>
>Also, the connection diagram is a little confusing and I haven't had 
time 
>to play with it yet, but I'm assuming that I CAN wire it so both 
relays can 
>be energized simultaneously and give me simultaneous parallel switch 
>closures?  How should I wire things up for 120V or 240V operation?  
>Since 120V only has one hot line, can I run the one hot wire through 
the 
>relay (which would give me 6 parallel relay contacts to use), or 
should I 
>run both the hot and neutral line through (esentially one relay per 
line)? 
> Presumably with 240V, I should also run both hot wires through the 
>relays?
>

If you can guarantee which is neutral and hot in your 120V wiring, 
parallel all the contacts on the hot.  Of course, use separate contacts 
for 220V connection.

Zap,
Mark