Electrical – 3ph 220v motor wiring

motorwiring

I have a pump motor that I was trying to wire. It's been a long time since I've wired a motor and I haven't seen one with just 4 wire connections- U, V, W, and ground.
I have 220v 3 ph power.

Can I wire it directly to a plug that can be plugged in to turn on and run the motor? Or do I have to have a controller?

Also do my red and black wires go to the U and V terminal and the neutral wire to the W terminal? That other terminal is the ground.

Thanks for y'alls help!enter image description hereenter image description here

Best Answer

U, V, and W are all power. Ground is obviously, ground. Uggh, I can't read Chinese. :)

In three-phase 220v AC, the UVW colors are all but meaningless. They may be black/red/white, or yellow/orange/red... really anything. But a "neutral" should never be used in 3-phase wiring.

You can wire them in any order. If the pump runs in reverse (hope that doesn't destroy it...) just switch any of the two leads - like U and V. Then it will run in the other direction.

Any 3-phase motor should be fused, and the vast majority use a contactor (glorified relay) to start/stop. The proper way to wire this would be SOURCE --> FUSES --> CONTACTOR --> PUMP. Then it's "always on", and simply activating the contactor (which can be done from 220 or even 110) starts and stops the pump.

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