Can the motor be re-wired to opperate from 240V 3ph

[Ken_Shea]

I was told this motor could be but the data plate does not look promising.
There are 6 wires coming out of it.

Thanks
Ken

EDIT:
The picture is not particurally clear so this is the data:
VOLTS: 480
Style: Serial
CYCLES: 60
Amps: 4/2
RPM: 1670
Type: 835 ( I believe)
Service Factor: Rise Cont

[ynneb]

The 6 wires are for 3 coils. If the coils are wired as a star configureation that means it is 3phase and neutral at the center point of the star making it 415 volts ( Or whatever your supply standard is.) If the coils are wired as delta ( A triangle) no neutral is used and it then becomes 240 volts ( Or whatever your supply standard is.)

I will do a drawing for you if my words are not clear.

Changing between Star and delta wiring will change the speed and torque of the motor though.

Hope this helped.

[Ken_Shea]

Hi Benny,
I'm lost !!!!

The 6 wires are each white and numbered 1 thru 6
I see no diagram at all just the 6 wires.

It is presently 480 volts.

Dropping voltage will likely drop the HP from the .750 to the listed .375 , that is not much HP even for these big brutes. The bearings are also a bit noisy so I may be better off just looking for a 1 - 1.5 HP 3Phase 240 volt, they should not be all that much money for a used one. I want to run this with a VFD so I will need to keep to a 3 phase motor.

Benny before you go to the trouble of drawing up a diagram let me look into getting another motor, if that does not work out then I will for sure need some help.

Thanks much
Ken

[ynneb]

Too late I went to the trouble.
Can you see that your motor has 3 sets of windings. obviously each set of windings have two ends. Hence the six wires.
You will need to do a continuity test to establish each set of windings. You then wire it as the star setup as shown.
In Australia our standard is 240/415 off the grid. I suspect your standard is 460 as you mentioned. Since you are going to buy a new motor you might as well try and wire it as suggested.
It is a good idea to test the windings between the motor casing and the wires. There should be infinate resistance. If not, just bin it.

[Ken_Shea]

Benny,
I pretty much understand the drawing but I am still confused, I have 6 wires, and they are all white.

Thanks
Ken

[unterhaus]

Ken, the power loss isn't half.

[ynneb]

Benny, I pretty much understand the drawing but I am still confused, I have 6 wires, and they are all white.

You will need to use a resistance meter to establish the coils. ALSO If when using the resistance meter you find that there are more than two sets of wires with continuity. Then bin it.