3 phase compressor

Discussion in 'Electricians' Talk' started by s heywort, Nov 18, 2021.

  1. s heywort

    s heywort New Member

    Its a long time since i did any 3 phase work but a friend has asked if i could connect his 3 phase compressor to an existing 3 phase outlet it has been moved from his old workshop and has a flexi tube with 5 wires in it earth black neutral and 3 reds what i cant remember is if it matters the phase order didnt want to make it run backwards though it probably would not matter as its a drive belt type
     
  2. CGN

    CGN Screwfix Select

    I’m pretty sure that reversing any 2 phases will reverse a 3 phase motor.
     
  3. Ind spark

    Ind spark Screwfix Select

    Yep as CGN says, put the 3 x reds in any order if it goes the wrong way swap 2 over.
    You could take the belt off before you try it if you think it might damage something.
     
    CGN likes this.
  4. Bazza-spark

    Bazza-spark Screwfix Select

    There should be something to indicate the correct direction of rotation. When you connect it, pulse the starter while watching the motor fan/pulley, that will let you see which way it is running. If it is the wrong way then as @CGN says, swap any 2 phases, ideally on the reds so that you maintain phase rotation in the supply side.
     
    CGN likes this.

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