shield in transformer

Discussion in 'General Electronics Chat' started by IKCTRAJAN, Jan 11, 2016.

  1. IKCTRAJAN

    Thread Starter Member

    Jan 6, 2016
    37
    0
    what is shield in transformer ?
    why it is apply & where it is on primary or secondary?
     
  2. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,509
    2,369
    Usually between primary and secondary and connected to earth ground, in order to isolate any HF on the primary, usually seen in audio amps etc.
    Also reduces capacitive coupling between pri & sec.
    Max.
     
    #12 likes this.
  3. RichardO

    Well-Known Member

    May 4, 2013
    1,230
    382
    Sometimes a transformer with a shield is used in medical instruments to prevent dangerous leakage currents. When a patient is connected by electrodes even a small leakage current from the secondary to the primary can be fatal.
     
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