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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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Motor Starter question
I need to get a motor starter for a 15hp air compressor. I plan on running
220v 3phase. My question is, when selecting a motor starter, what voltage coil should I get to power the contactor? They make 110v and 208~240. If I get a 110v coil, I would assume I need to run a neutral wire back to the panel? If I select a 220v coil, then I can just pull 2 leads L1 & L2 to power the coil? -- Tony Visit TonysToolroom for info on Precision Scraping. ***Now with Powerscraping*** Don't skive that belt before you visit my flatbelt page! http://www.csgnet.net/toolroom/ Spammers Beware : Your entering the No-Spam zone **** Protected by Mailwasher **** www.mailwasher.net Caution:Bouncing Spam: Eye protection required! |
#2
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Motor Starter question
You do have options, but I would..
Go with the 110 coil, that is the standard that 95% of all industry is using these days. Years ago it wasen't uncommon to see 208-240v and 480 coils in the control circuits of motor starters. If the starter you buy doesn't already have a control transformer to get 110 from your 220v source they are cheap to buy. Just remember to fuse the transformer. If you are using second had equiptment you might not have the option of choosing your voltage and many off brand starters are increasingly becoming harder to buy parts for. In that case you might have to buy a transformer to step up or step down your power to whatever your starter coil is rated for. tim |
#3
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Motor Starter question
Tony wrote:
I need to get a motor starter for a 15hp air compressor. I plan on running 220v 3phase. My question is, when selecting a motor starter, what voltage coil should I get to power the contactor? They make 110v and 208~240. If I get a 110v coil, I would assume I need to run a neutral wire back to the panel? If I select a 220v coil, then I can just pull 2 leads L1 & L2 to power the coil? -- Tony You could go the control xformer route, but as the only control device is just a pressure switch and not normally accessed by personnel, just go with the 220 coil, it's how all the air compressors I'm familiar with do it. Regards Paul -- ----------------------------------------- It's a Linux world....well, it oughta be. ----------------------------------------- |
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