Yes this is the typical starter contactor device or circuit.
You place a N.O. aux contact on the contactor in parallel with the start P.B.
If you lose power the contactor drop out and opens the retaining contact.
You can also get starter boxes already configured this way.
Telemecanique wiring diagrams
Max.
I'm not being smart, you said 'the' , not sure what you mean.Start, reset, engage N.O. P.B. or what ever you want to call it.
Max.
Your words, 'a switch or button' this is the N.O. P.B. I am referring to, you can also get self contained Starter boxes with start stop and the retaining contact or latch already configured.I want to be sure a switch or button has to physically be pushed before
power can be re established.
..
Your words, 'a switch or button' this is the N.O. P.B. I am referring to, you can also get self contained Starter boxes with start stop and the retaining contact or latch already configured.
Using separate items, you have to wire it your self, but it is minimal.
Max.
Ok...Thanks,That is rated a Definite Purpose Contactor intended for HVAC & heavy duty use etc.
You may not get a self contained unit with that rating, you would have to ask a local electrical supplier that stocks Square-D etc.
If it has no aux contact and no allowance for one, the alternative is a small auxilliary relay with a contact on it that picks up the coil, the relay would be wired exactly as per the PDF.
Max.
Yep, definite purpose , a bit of over kill for the equipment but very affordable.That is rated a Definite Purpose Contactor intended for HVAC & heavy duty use etc.
You may not get a self contained unit with that rating, you would have to ask a local electrical supplier that stocks Square-D etc.
If it has no aux contact and no allowance for one, the alternative is a small auxilliary relay with a contact on it that picks up the coil, the relay would be wired exactly as per the PDF.
If it is HVAC etc, you most likely have a 12v/24v circuit there you could use for the small aux relay?
Max.
jard 17999
http://www.herculesindustries.com/ProductSpecs/MARS_M17999.pdf
I don't know where to order one?
A small aux relay as per #10 is easier than 555 & mosfets etc?I might try a 555 in monostable with a P type mosfet or something and go around it another way.
Thanks!!
A two pole contactor with a 120 volt coil / turns on a 220v table saw.Could you explain the control circuit and load?
There may be other solutions.
The control relay solution suggested, may even be required, if the contactor is automatically controlled.
Or for certain load, from the same supply as control, two poles may be enough.
So is this what you have now?A two pole contactor with a 120 volt coil / turns on a 220v table saw.
When the power goes out in the building , the coil will de energize, but when the power comes back on the coil will re energize and turn on the circuit.
I need a manual reset , so the coil cannot be energized unless someone
physically pushes a reset button/switch following any power outage.
I'm great with contactors, but have no clue how an auxillary contact block works.
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