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Anyone used and/or hooked up a larger frequency converter before and can give me any details on how it works? Do you bring one large circuit into it and branch off with smaller circuits or do you pull each individual smaller circuit into it and feed thru? Customer wants to run 75 small motors for a test for a European company that all run at 240v single phase 50hz, all must run at same time, motors are about 2-3 amps each at run obviously a little higher at startup. Any info is appreciated, just haven't worked with frequency converters before.
 

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Anyone used and/or hooked up a larger frequency converter before and can give me any details on how it works? Do you bring one large circuit into it and branch off with smaller circuits or do you pull each individual smaller circuit into it and feed thru? Customer wants to run 75 small motors for a test for a European company that all run at 240v single phase 50hz, all must run at same time, motors are about 2-3 amps each at run obviously a little higher at startup. Any info is appreciated, just haven't worked with frequency converters before.
Bump!:)
 

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If three phase is available an appropriately sized VFD might work, hook an equal number of motors A-B then B-C and C-A. Set the drive at about 83% and you're set.
JRaef would know for sure.
 

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If this is a temporary test, the best option would be to rent a generator from one of the large equipment rental companies. You can request one with a 230 volt 3 phase, 50 hertz output. This is no problem to get.

For distribution to the motors, you will need to assemble a panel (probably several to hold the volume) with fusing, starters and overloads for the motors. You could group maybe 10 or 12 motors on one set of fuses/breaker and one contactor. Each motor would need it's own overload relay. This will be a rite expensive set up for a test.
 

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Why must they all run at the same time? How long must they all run for? Gen set rental is probably your best bet, most all the larger ones have a switch for 50 or 60hz.

Are you just feeding a MCC of sorts?
 
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