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Leesburg, Ohio | Hudson: Here is what you need:
http://www.ebay.com/itm/Square-D-Motor-Starter-w-Elec-Interlock-Nem...
In fact, if you don't buy this one in the next few days, I probably will, just to re-build my inventory.
I buy all my magnetic contactors on ebay, used, at about 1/10th or less of the cost of new. Have three new grain legs and all associated augers and drags on two farms all running on these used square-d contactors. They are old, but almost bullet-proof.
Look for the 8536 series, and make sure they have 120v coils. You can buy new heater strips to put in based on the amperage you need to pull. The new heater strips will cost almost as much as the cheaper contactors, but still way better than paying 1000 to 2000 starting out. Most of mine are NEMA sizes 1, 2, or 3. Only threes I use are on 20hp motors or larger. Everything else on mostly size ones, 10 and 15 hp on size 2.
You can use these three phase contactors on single phase motors, just use two sets of terminals.
If you need to interlock (keep a bin unload from starting if leg is not running...) some of these have another set of contacts on the side to accommodate that without using another relay. Or just get your coil voltage to supply the starter button current for the auger from a main terminal on the leg, for example.
Ken
Edited by KDD 1/18/2017 16:41
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