3 ph to single ph switching ?

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stereotype - 01 Dec 2006 19:40 GMT

Just bought a three ph Boxford tool and cutter grinding machine with F/
switches (push button) would an electrician be able to connect thes
switches to a single ph motor with four wires coming out or will th
switches have to be replaced ? Davi

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stereotyp

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Trevor Jones - 01 Dec 2006 23:45 GMT

> Just bought a three ph Boxford tool and cutter grinding machine with F/R
> switches (push button) would an electrician be able to connect these
> switches to a single ph motor with four wires coming out or will the
> switches have to be replaced ? David

Depends on the actual switches. If they are magnetic contacter types,
they can usually be wired to work on single phase of the same voltage
that they are rated for. If they are simply a mechanical crossover type
switch (ie: they just break one connection and make another when the
switch is thrown) they should be able to be made to work if you have a
reversing motor.

You might consider spending the money you might otherwise pay an
electrician to sort this out, on a Variable Frequency Drive or VFD. It
takes single phase power in, puts out three phase, and usually gives the
added advantages of soft starting (reduces the current draw on start)
and variable speeds at the touch of a button or dial.

Do a search on ebay to see prices and availability.

Cheers
Trevor Jones

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Model Forum / General / Models / December 2006

3 ph to single ph switching ?