problem with CT connection

Discussion in 'General Electronics Chat' started by henyson, May 4, 2015.

  1. henyson

    Thread Starter New Member

    May 4, 2015
    2
    0
    Hello!

    look at my attached image.
    IMG_20150504_213521.JPG
    This Connection gives wrong current on CT1 secondary winding. As soon as I disconnect CT2, CT1 gives correct magnitude of the secondary current.
    What am I missing here?
     
  2. Reloadron

    Active Member

    Jan 15, 2015
    963
    232
    CT2 is driving into a dead short as drawn, you are aware of that correct?

    Ron
     
  3. henyson

    Thread Starter New Member

    May 4, 2015
    2
    0
    I have short-circuited the secondary of CT2 intentionally to minimise the burden.
    For example: 5 A -> 1A with CT1 and further 1A -> 1 A with CT2 which I measure with an ammeter.
    The problem is that the value on CT1 secondary is much lower than 1A ( if I have 5 running in the primary) as long as CT2 is connected
     
  4. Lestraveled

    Well-Known Member

    May 19, 2014
    1,957
    1,215
    Due to inefficiencies in CT2, a dead short (0 ohms), is not reflected across the secondary of CT1. Remove CT2 and short the secondary of CT1.
     
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