3 phase motor - 520V?

[blaze_125]

There is a local guy selling some hoist. He said he bought them but, can't use them because he doesn't have the proper electricity supply.

He says the motors are 3 phases 520v. Does that make sens?
I may be able to get a lift for really cheap here, is there any way I could put that thing in my home garage?

 

[1320stang]

never heard of 520v, 480v I have....

You'd have to change the motor out to a 220/240v or a 120v.

 

[OldCarGuy]

By any chance could that be the maximum rated Voltage on the motor?

Any standard three phase motor can run on plus or minus 10% nameplate Voltage. Therefore that motor will run satisfactorily on 468 Volts. Once you convert the 240 Volt single phase to three phase using a VFD of RFC all you need is a step up transformer. Upping the Voltage to 480 Volts. Then you’re good to go…

I use such a step-up transformer to run one of my machines on 480 Volts. Because it would be far too much work to change its’ five separate motors from 480 Volts to 240 Volts.

 

[blaze_125]

Once you convert the 240 Volt single phase to three phase using a VFD of RFC all you need is a step up transformer. Upping the Voltage to 480 Volts. Then you’re good to go…

If I was to do all that, would my good deal still be a good deal or will the electrical setup cost me an arm, a leg and my left nut? How much would I be looking at to do that electrical work?

Can Mr.DIY do it all on his own, or does he have to **** up his pride and call an electrician?

I'm looking at a Hoffman hoist I might be able to get for 7-800$

 

[OldCarGuy]

The transformer will be your biggest concern, and most likely biggest expenditure. Most likely you’ll have to purchase the VFD new, somewhere in the neighborhood of $300.00. Then hopefully you’ll be able to find a used transformer for $100.00 to $200.00. All depending on the HP motor of the pump. You might be better changing the motor over to single phase. If you could find one.

If you’re not familiar with electrical wiring of this magnitude, I’d suggest that you find someone that is qualified. And would all this nix the deal? It sure would eat into it. Especially considering there is no warrantee on used equipment. And if something major would fail, like a pump or cylinder, you could easily be in the hole.

 

[Aceman]

Way to much hassle, just replace the motor.

 

[2low]

If I was to do all that, would my good deal still be a good deal or will the electrical setup cost me an arm, a leg and my left nut? How much would I be looking at to do that electrical work?

Can Mr.DIY do it all on his own, or does he have to **** up his pride and call an electrician?

I'm looking at a Hoffman hoist I might be able to get for 7-800$

sounds like the hoist i just sold i just sold a white hoffman hoist due to power problems

 

[CraigFL]

I'm not sure why some think you would need a VFD(I'm assuming Variable Frequency Drive?) and a transformer. I think you would only need a VFD since the drive converts the 3 phase 460 to drive the motor. I also suspect that 520V is at some other frequency than 60hz -- probably 50hz. This would be taken care of by the VFD also.

But... it probably is still best to change the motor unless the mounting is difficult because the VFD cost will probably exceed a motor replacement.

 

[Jay H 237]

never heard of 520v, 480v I have....

Areas of Canada have 525v. Most of our robots and other equipment from work sent there are set up for 525v, they do have 480v there too but only in certain areas.

 

[Freejack]

Jay beat me too it, but that is likely some sort Canadian spec motor. 575 is a common 3ph voltage in Canada, so it could be a varient of that.

Jake

 

[blaze_125]

I'll bump this thread from the dead if you don't mind.
The guy still has the hoist for sale so I'm seriously considering it. Can someone link me to the type/kind of motor I need to make it work at my house?

 

[sneezer41]

Would need to know much more about the hoist, as there are many types of motors and some integrated motor/pump setups

 

[tfi racing]

Check with a motor rewind shop.The motor may be able to be reconfigured for various voltages,if not they may be able to rewind it for less than a new one.Doubtful,but you never know...

 

[blaze_125]

Would need to know much more about the hoist, as there are many types of motors and some integrated motor/pump setups

This picutre is the most I know about it...

 

[Don T]

I've seen 525V 3 phase in a lot of the older lumber and pulp mills in this area. Seems to be going away as they shut down and are replaced with something else.

Just my 2 cents worth...

 

[LoneGunman]

Spend the $700 or $800 on the other one you said you may be able to get. Large single phase motors are not cheap, if you go with a 3 phase motor youll need a phase convertor , the motor cost plus the phase convertor will be close to the $700 or $800 plus you'll need someone with the knowledge to make it work. Without knowing the existing motors size nobody can point you to the right motor.

 

[Kevin54]

Look for a "phase converter" They vary in price from around $400 on up.