Static phase converter wiring?

Butch(OH) · Jan 25, 2011

Years ago I purchased a Phase o Matic static converter to run a mill. Worked well enough but hung it on the wall when I upgraded to a true rotory. Now I have purcased a used 3 phase DoAll drill press for shop 2. The Duall is a two speed motor and reversing thus has mounted switches for doing alll this. My question is when I have used these converters before we had them wired hard to the motor and switched the power on and off prior to the converter. The DuAll does not allow this because of the two speed and reversing switches. I would have to power up the converter, then start the motor, will that work? Simple wiring diagram included (hopefully)

Doug - Iowa · Jan 25, 2011

I suggest you simply use your static converter to build a rotary converter, then hook your 3PH machine to that. You can probably find a 4-5 HP 3PH motor cheap to use for the rotary, hook it up to the static converter with a second set of three wires running to the new machine. Start the rotary and then start the new machine. 2 speed and reverse should still work fine. You might be a bit short on full HP of the new machine but if you are not running it to capacity you probably will never notice it.

NCWayne · Jan 25, 2011

I know you can power the converter up before starting the motor on the drill press with a static converter as that's the way I wired Dad's Bridgport mill before he got a 20HP rotary to handle several other tools also. The thing I question is the operation of the two speed function and how that will effect or be effected by a static type converter, if at all. You might want to call the mfg on that one.

Butch(OH) · Jan 25, 2011

A picture of it and Thanks men, I am realy short on elctric at times.
We shouldnt be pushing it as it is an H-D unit rated (I think) 1 1/2" in steel. The motor has two amp ratings, hi and low. Was hoping to be able to use it just with the static while I scrounge for a 4-5HP 3600 motor for the idler. Thansk again

JMS/.MN · Jan 25, 2011

Google home made phase converters. Made mine on a friends description a few years ago- info is the same as what was found on google- works fine. Made mine from "junk" I had, bought only a switchbox. Mine is not a capacitor unit-uses a spinner motor to start the old 3 phase motor I had.

MF24-4 · Jan 26, 2011

My lathe that I just got has a Phase-a-Matic. It is wired to the relays. The reverse relay was bad and I just got them replaced with a Ebay purchase last week. The 220 to 110 control transformer has to be wired to L1 and L3. Phase converter is on all the time that it is plugged in. To cold to work with it now but it works fine. Unit has to be mounted upright as you have probably seen on their web site.

buickanddeere · Jan 26, 2011

The way the price keeps dropping on VFDs. I'm surprised with people still interested in rotary and static three phase converters.

Butch(OH) · Jan 26, 2011

Yup B&D I know what you mean, checked fleabay and $128 USA buck deleivered 2 HP model. Problem is I found that daggone static phase convertor about 5 minutes before I was going to quit looking and my cheapo side usualy wins out.
The only other reasons to go rotory would be many tools in one shop that you dont need the variable speed, or if a person has access to free electric parts and pieces and the know how to put it together.

Static phase converter wiring?

Butch(OH)

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Doug - Iowa

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NCWayne

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Butch(OH)

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JMS/.MN

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MF24-4

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buickanddeere

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Butch(OH)

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