I have a single phase motor with five outgoing wires: white, brown, red, blue and black.
- white - has no resistance with any of the others.
- brown-blue = 136Ω
- brown-black = 366Ω
- brown-red = 108Ω
- red-blue = 25Ω
- red-black = 260Ω
- blue-black = 236Ω
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Sign up to join this communityI have a single phase motor with five outgoing wires: white, brown, red, blue and black.
If you have a single-phase three speed split capacitor motor, the following will explain your readings:
simulate this circuit – Schematic created using CircuitLab
Numbers in Green are calculations, which correspond to your measurements.
I believe that @StainlessSteelRat has presented a pretty likely configuration for the "Run" coil and the speed selections. I suspect that the white wire is connected to an internal capacitor that is connected in series with the "Auxiliary" coil. That would be one explanation for infinite resistance between the white wire and the other wires.
If all that is correct, the diagram below would be the complete connection diagram.
One more thing to keep in mind is that the actual operating speed for a motor like this is determined by the load. With the motor disconnected from the load the speed will be close to 1500 RPM regardless of the connection. The load will slow the motor down. The medium and low connections make the motor weaker so it slows down more.