What is the usage of isolation transformers

Discussion in 'General Electronics Chat' started by Ali Alkhudri, Nov 26, 2015.

  1. Ali Alkhudri

    Thread Starter New Member

    Nov 3, 2015
    19
    1
    Hi
    I was reading about isolation transformer in google , I found this

    " Mains isolation transformers can sometimes be used to help reduce the electrical noise at an emissions test site by breaking ground current paths. The lower their leakage and the higher their isolation the better "
    http://incompliancemag.com/article/guide-to-testing-conducted-emissions-part-2/

    What does that meaning mean?
    thanks
     
    spinnaker likes this.
  2. crutschow

    Expert

    Mar 14, 2008
    12,974
    3,220
    Emissions tests are often done in a screen room that is shielded to block any electromagnetic waves from going in or out of the room.
    One sneak path for these waves would be a conduction path through any transformers that feed power into the room. Thus isolation transformers are used which are specifically designed to have low capacitance and high resistance between the input and output to minimize this conduction.
     
    spinnaker likes this.
  3. Ali Alkhudri

    Thread Starter New Member

    Nov 3, 2015
    19
    1
    thank you
     
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