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Current Transformer

Discussion in 'General Electronics Discussion' started by limecc, Sep 12, 2014.

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  1. limecc

    limecc

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    Sep 12, 2014
    Hi I'd appreciate a little advice regarding choice of a current transformer. I'm trying to duplicate a load sensing cable I have (which was extremely overpriced) for a friend. Ideally I would buy a Noratel TR3025S which is a 90amp device 1:300 turns and I saw these for $10 on EBay US site, unfortunately postage to UK is $178 - ridiculous! Is there a similar transformer readily available in the UK maybe it would be a different ratio but would give the same output with some external components added? Input will be 240v 0-20A.
     
  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,499
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    Jan 21, 2010
    Here you go. RS are UK based and list a heap of devices. Is there a suitable one there?
     
  3. limecc

    limecc

    2
    0
    Sep 12, 2014
    I found this one 399-7317 but it's only 15A, the max amps will be 16 I said 20 to allow a little overhead do you think it would be OK?
     
  4. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,499
    2,839
    Jan 21, 2010
    It's hard to say. The output may lose linearity. Check the datasheet, it may have graphs extending beyond the rated maximum current.
     
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