I've been looking at old big iron mills recently, specifically Van Norman 22L's. At least one of these has 440v power.
What would it take to convert a 440v electric motor and drive system to 220v? Is this at all feasible??? I have 220 single phase and 3phase available in my shop.
Might there be some electrical components in the mill that need 440v to operate properly- hence a deal breaker for converting to more manageable 220...???
Thanks for any input or advice.
Glenn
Converting 440v mill to 220v
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Converting 440v mill to 220v
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Motive power : 1902 A.S.Campbell 4-4-0 American - 12 5/8" gauge, 1955 Ottaway 4-4-0 American 12" gauge
Ahaha, Retirement: the good life - drifting endlessly on a Sea of projects....
Motive power : 1902 A.S.Campbell 4-4-0 American - 12 5/8" gauge, 1955 Ottaway 4-4-0 American 12" gauge
Ahaha, Retirement: the good life - drifting endlessly on a Sea of projects....
Re: Converting 440v mill to 220v
I may be wrong, but you should be able to simply rewire the motor (internally) to operate on 220 volts. You might find instructions inside the electrical box on the motor. Many are built accordingly.
Harold
Harold
Wise people talk because they have something to say. Fools talk because they have to say something.
Re: Converting 440v mill to 220v
Most 3Ø motors of that type are either dual or triple voltage: 208, 240, 480. The motor's name plate should indicate how to wire it. The rest of the mill probably is 120.Glenn Brooks wrote:I've been looking at old big iron mills recently, specifically Van Norman 22L's. At least one of these has 440v power.
What would it take to convert a 440v electric motor and drive system to 220v? Is this at all feasible??? I have 220 single phase and 3phase available in my shop.
Might there be some electrical components in the mill that need 440v to operate properly- hence a deal breaker for converting to more manageable 220...???
Thanks for any input or advice.
Glenn
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Music isn’t at all difficult. All you gotta do is play the right notes at the right time!
Music isn’t at all difficult. All you gotta do is play the right notes at the right time!
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Re: Converting 440v mill to 220v
the bugabo is it depends??? coolant motor, control transformer( often easy) motor overloads, it will now draw twice as much current. and if no control transformer, coil s in the starter relays may need to be changed
if the motor has been rewound it may only have 3 leads out, so some looking will be necessary
if the motor has been rewound it may only have 3 leads out, so some looking will be necessary
Re: Converting 440v mill to 220v
Some OEM motors were 440V only. I took a pass on a grinder that was that way. Grinder was a good deal if not for that voltage issue, but I just didn't feel it remained a good deal if I needed to add a substantial buck/boost to the solution.
Russ
Master Floor Sweeper
Master Floor Sweeper
Re: Converting 440v mill to 220v
If your motor is 440V 3phase only, and you have 3 phase in your shop, I'm thinking a transformer to step up your voltage would be all that is needed. I don't know the nameplate data (current) for your motor so I can't say how practical this solution might or might not be.
Les
Les
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Re: Converting 440v mill to 220v
Yep, thanks all. I think the transformer idea is the simplest way to go. The VN 22l got away to another buyer, so I am still looking. However, it seems a lot of the big iron machines are all 440 or even higher voltage, so same issue with compatibility.
I am limited to 10hp on my three phase RPC (5hp on the machine side), but that will power a pretty good size mill- bigger than I need actually. So ultimately hoping to find something that is 220 from the get go, yet still gives me decent vertical clearance. Siren call is still strong from some of these old high voltage mills, when you click on their page.
I am limited to 10hp on my three phase RPC (5hp on the machine side), but that will power a pretty good size mill- bigger than I need actually. So ultimately hoping to find something that is 220 from the get go, yet still gives me decent vertical clearance. Siren call is still strong from some of these old high voltage mills, when you click on their page.
Moderator - Grand Scale Forum
Motive power : 1902 A.S.Campbell 4-4-0 American - 12 5/8" gauge, 1955 Ottaway 4-4-0 American 12" gauge
Ahaha, Retirement: the good life - drifting endlessly on a Sea of projects....
Motive power : 1902 A.S.Campbell 4-4-0 American - 12 5/8" gauge, 1955 Ottaway 4-4-0 American 12" gauge
Ahaha, Retirement: the good life - drifting endlessly on a Sea of projects....
Re: Converting 440v mill to 220v
Charlie Pipes
Mid-South Live Steamers
Current Projects:
Scratch Built 3 3/4 scale 0-4-4 Forney
Little Engines American
20 Ton Shay (Castings and Plans Purchased for future)
Mid-South Live Steamers
Current Projects:
Scratch Built 3 3/4 scale 0-4-4 Forney
Little Engines American
20 Ton Shay (Castings and Plans Purchased for future)