Machine Switcher

something like RS part no 257-9558 4 pole changeover switch should do the job (3 phase and neutral). would need boxing up and contact rating checking for you application (this advice is worth what you paid for it...)

hth

Dave

All you need is two three phase isolator switches both fed from the inverter, and each feeding a machine, and only switch on on at a time. Remember if you switch the output of the inverter when it is 'on' you are liable to damage it.

AWEM

The cheapest way would be to hook both to inverter and never turn both on at same time.

After that using two 4 pole relays to insure only one of two is latched is the next idea.

Then there is a 3pha transfer switch which is likely going to be hard to find cheap.

Wes

You could always fit a 3 phase socket on the output from the inverter and put plugs on the lathe and mill, just plug in which one you want.

Regards Kevin

I use two double pole changeover switches to switch between lathe or mill. The switch knobs are connected together so that they operate in unison. The 250v 10A switches are quite inexpensive from Maplins. It has been working well for me for a few years Regards Alan

I used RS part 222-5841 for exactly the same task

Charles

i would recomend a changeover switch which has a centre off position and a supply to motor number 1 in the position 1 and by changing over ie switching to position number 2 thereby supplying motor number 2 send me an email offline and i will send you a picture of one regards geoff

Adding to the comments of others: Be aware, that the cables from the VFD's output to the motor should be short. You'll get a lot of electrical noise. You also should read how long the connection is allowed to be according to the manufacturer. And, chances are high that the VFD will be kaputt when you switch between motors while the VFD is driving a motor. Last but not least: If the motors do have different characteristics (power, lowest/highest RPM, acceleration ramp, etc) you will only be able to handle one right.

So if you can afford it, one VFD per tool would be best.

Nick

Thanks for the help guys - I'm going to go down the plug route, it'

probably more fool-proof in the long run.

Cheers, Pau

-- Mr Cran

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