zim Posted April 2, 2013 Share Posted April 2, 2013 Ok, I realise that the simple fact that i'm asking this question probably means i shouldn't be doing it myself...but hey, we all have to learn ! I don't know a lot about mains electric. I'm wanting to wire up a single phase suds pump on my new milling machine. It already has 2 seperate push buttons for on and off. Is this the best way to do it : ? Thanks Gordon Edit : Is this the correct contactor ? http://uk.rs-online.com/web/p/contactors/6851551/ Quote Link to comment Share on other sites More sharing options...
Les Brock Posted April 2, 2013 Share Posted April 2, 2013 Ignore me read it wrong lol Quote Link to comment Share on other sites More sharing options...
ejparrott Posted April 2, 2013 Share Posted April 2, 2013 Yes and Yes, although I've never seen one wired like that before for the main current. I was always taught when running single phase to wire the incomer to 1, then jump 2 to 5, then take the load to 6...never seen the incoming split across 1,3 and 5 before, with the load across 2,4 and 6 Quote Link to comment Share on other sites More sharing options...
TheRecklessEngineer Posted April 3, 2013 Share Posted April 3, 2013 Yes and Yes, although I've never seen one wired like that before for the main current. I was always taught when running single phase to wire the incomer to 1, then jump 2 to 5, then take the load to 6...never seen the incoming split across 1,3 and 5 before, with the load across 2,4 and 6 That's interesting. I've only ever used 3ph through contactors, but I'll be wiring a few for single phase shortly. Thanks for the heads up! Quote Link to comment Share on other sites More sharing options...
zim Posted April 3, 2013 Author Share Posted April 3, 2013 Thank you. Quote Link to comment Share on other sites More sharing options...
zim Posted April 3, 2013 Author Share Posted April 3, 2013 Ok, So i opened the switch panel up on my milling machine today. And found that all the "Stop" buttons have a wire joining each switch. There are 4 switches for different motors / pump. So from this, i've had a think and a look on google and come up with this drawing. Is it ok ? It saves me modifying any wiring in the switch panel. I'll remove the complete contactor board from the back of the machine and fit 3 of my own (main motor, coolant pump and power feed). I assume i can use 240v single phase to switch all 3 contactors ? Found this, which i've modified a bit : http://claydons.org/public-html/elec/startstop.gif http://uk.rs-online.com/web/p/contactors/6851551/ G Quote Link to comment Share on other sites More sharing options...
TheRecklessEngineer Posted April 4, 2013 Share Posted April 4, 2013 Bang on. You can also put an em-stop as a normally closed push button in the control voltage supply - hit it and every contactor will come out. There are some cheap contactors on eBay at the moment. Quote Link to comment Share on other sites More sharing options...
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