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  1. LearningTechMan

    Star-Delta wirings polarity

    OK , there is the exact situation: On a compressor we have a 150 HP rebuilt motor, 575V , 6 wires (3 windings) , control by a set of 3 (new)contactors for proper star-delta running. Windings are equals in resistance ( 0,0310 0,0312 0,0309 ohm) Voltages delta is acceptable (577 581 587) Lines...
  2. LearningTechMan

    Star-Delta wirings polarity

    Someone have an idea of the impact of having one of the 3 motor windings reversed (exemple: if wires U1-U2 and V1-V2 are connect normaly but W1-W2 are swapped. Will it start, and if yes, what will append to the phases currents of the motor ? Two coils will be opposed to the reversed one? Will...

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