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    prashant1988's Avatar
    prashant1988 Posts: 7, Reputation: 1
    New Member
    		  
    #1

    Jul 29, 2009, 03:00 AM
    100/5 current rating on Current Transfomer
    What is meaning of current rating 100/5 printed on CT?? /
    KISS's Avatar
    KISS Posts: 12,510, Reputation: 839
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    #2

    Jul 29, 2009, 03:33 AM

    Most likely 100 Amps in 5 amps out
    tkrussell's Avatar
    tkrussell Posts: 9,659, Reputation: 725
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    #3

    Jul 29, 2009, 03:56 AM
    AKA Ratio

    Current transformer - Wikipedia, the free encyclopedia

    This must be one heck of a test your taking.

    Did you sleep through all the classes?
    Craig2009's Avatar
    Craig2009 Posts: 2, Reputation: 1
    New Member
    		  
    #4

    Aug 9, 2009, 11:47 PM

    It simply reduces the actaul current in the conductor being measured by the ratio as noted on your CT to a more manageable level.
    i.e. if your conductor is running at say 80A, then the CT will be 100:5 (20:1) ratio, which is more manageable for metering or measurement purposes. The output side shall be 4A
    sathe1963's Avatar
    sathe1963 Posts: 97, Reputation: 4
    Junior Member
    		  
    #5

    Sep 3, 2009, 06:48 AM
    In simple language this is current transformation ratio called as ct ratio.
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