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Merits and Demerits of Current transformer secondary winding turns

Discussion in 'General Electronics Discussion' started by Touseef, Sep 29, 2015.

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  1. Touseef

    Touseef

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    Sep 29, 2015
    Hi..
    this is my first post in this forum, please give me details on the current transformer
    what is the impact of having secondary turns lesser than 100 turns
    & vice verse.
     
  2. Harald Kapp

    Harald Kapp Moderator Moderator

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    Nov 17, 2011
    Less turns = higher secondary current
    More turns = less secondary current

    Where do you take the magic number 100 from? You can have current transformers with widely varying turns ratios, depending on your application.
     
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  3. Touseef

    Touseef

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    Sep 29, 2015
    have designed my own CT(ferrite core coil) with just 30 turns, bcuz of lesser primary current about 0.1A, does it have any drawbacks in long run. thanks for your reply
     
  4. duke37

    duke37

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    Jan 9, 2011
    The number of turns affects the impedance of the transformer secondary. This should be considerably higher than the load resistance. I expect that you are using a high frequency if you have a ferrite core.
     
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  5. Harald Kapp

    Harald Kapp Moderator Moderator

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    Nov 17, 2011
    What are you thinking of?
    If the transformer and the circuit surrounding it are designed properly (i.e. with respect to impedances, wire gauges, current flowing etc.) and works correctly, which long term effects would you expect?
     
  6. Touseef

    Touseef

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    Sep 29, 2015
    someone give some basics of burden resistor, design guide, applications for it. please ignore my lack of knowledge on it by degrading questions. i appreciate your response.
     
  7. Touseef

    Touseef

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    Sep 29, 2015
    how to calculate impendance by no of turns, can u give me an example of it. thanks
     
  8. Harald Kapp

    Harald Kapp Moderator Moderator

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    2,930
    Nov 17, 2011
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