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TPN isolator and switch

Discussion in 'Electrical | Electronics | Communications' started by parin bumia, Jan 3, 2014.

  1. parin bumia

    parin bumia Apprentice

    Engineering Discipline:
    Electrical
    Where to use TPN switch and TPN Isolator,Moreover y to use it.I Have gr8 confusion regarding the realm of neutral wire.y is it so necessary.
    Plz help.........
     
  2. J Biswas

    J Biswas Enthusiast

    Engineering Discipline:
    Manufacturing
    TP - 3P switching no N

    TPN - 3P switching with un-protective N (no problem unless the motor winding body to the metal) :) - other machines/electronic devices (grounded might get affected otherwise)

    TPNY - Many factories / countries don't allow TPN because of the above reason. Hence independent switching of N is done along with isolation with ground.
     
    • Like Like x 1
  3. J Biswas

    J Biswas Enthusiast

    Engineering Discipline:
    Manufacturing
    We are in the process of designing a system that alarms whenever neutral line is grounded (for 3P motors), work is still in progress.

    - JB -
     

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