3Phase

[Living in the Past]

you should have a black red and blue on low voltage (208/230). A white wire should be a neutral not a power feed. Black red and white sounds like a 230 volt single phase. As for hooking up the motor the three power leads shouldn't matter. If the motor runs backwards just switch any two power leads and that will reverse rotation.

 

[FJ40Jim]

Thanks, LIP!

Hooked up the three power leads in random order, motor runs just fine.

Anybody need to rent time on a Bridgeport "M head" mill?

 

[zebrabeefj40]

Thread dredge!

A Bridgeport mill has appeared in the shop, courtesy of the tool zebra.

The 1947 mill head is powered by the original 1/2hp 208V 3ph motor.
There is a 1980's era solid state 1ph-->3ph converter and VFD bolted to the side of the mill. The terminal block of the VFD has 4 posts for the 3ph output power to the motor. They are labeled 1 2 3 gnd.

The bare ground wire is pretty obvious, but does it matter how the black/white/red motor wires are connected to the #1 or 2 or 3 terminals?

The connections for the 230V 1ph input were simply line1, line2, gnd/neutral. With that connection made, pushing the start button does engage a relay and light the power lamp, and does not light the 'fault' lamp. Just want to make sure there is no significance to the 3ph colors/numbers before making final connection.

Careful who yer callin' a tool there mister....

 

[neufab]

boy (brown),(orange),(yellow) 1,2,3