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Slit Core current transformer

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  • 20-10-2012 3:22pm
    #1
    DublinDilbert
    Registered Users Posts: 5,379 ✭✭✭


    Hi All,

    I was wondering if anyone knew of an irish supplier where i could get "small" split core current transformers, suitable for 50Hz mains power.

    Something like these:-
    http://www.crmagnetics.com/Products/CR3100-Series-P75.aspx

    RS/Farrnell do have some current transformers, but very few are split cores and many of them are designed for HF applications.

    Thanks


Comments

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    #2
    freddyuk
    Registered Users Posts: 1,111 ✭✭✭freddyuk


    What specification do you need? I have energy monitors which use these and have a contact that actually specializes in CT stuff but they will want to know the current range and output voltage?
    Also what size cable?


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    #3
    DublinDilbert
    Registered Users Posts: 5,379 ✭✭✭DublinDilbert


    I only need to measure 1A, but the likes of a 30A or 50A one would do. Yea it's basically similar to what's supplied on many home energy monitors.

    I'm looking to buy about 10 or 12 of them.


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    #4
    ted1
    Registered Users Posts: 23,543 ✭✭✭✭ted1


    Give Dave Harrington a call. Dhmeters.com. have you meters installed? Do they take convetional CT'S or are they using 0-5v signal.


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    #5
    frankmul
    Registered Users Posts: 378 ✭✭frankmul


    Digikey have that item
    http://www.digikey.ie/search/en?keywords=Cr+3100&refPId=3
    Would love to know what you go for in the end


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    #6
    DublinDilbert
    Registered Users Posts: 5,379 ✭✭✭DublinDilbert


    I ordered some from spark fun today. Slightly cheaper than digi key.

    I did find the supplier of the sparkfun one, and they would supply for $5 each in low volume. I'm really surprised RS don't have one....


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    #7
    frankmul
    Registered Users Posts: 378 ✭✭frankmul


    Can I ask how much postage was for that.


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    #8
    ted1
    Registered Users Posts: 23,543 ✭✭✭✭ted1


    What size did you end up getting? The accuracy of the 40A+ at 1A wouldn't be great.


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    #9
    DublinDilbert
    Registered Users Posts: 5,379 ✭✭✭DublinDilbert


    I ordered the 30A ones, it's only for lab education use, so will work fine for that.

    I tried the cr magnetics one with a national instruments daq and found it very accurate. The voltage waveform was spot on.


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    #10
    leeomurchu
    Site Banned Posts: 957 ✭✭✭leeomurchu


    I use them in work 40-600A I can find out the supplier for you if you haven't come across them yet.


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