Power utility Meter

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  • #10379

    Dear Engineers;

    I have attached a Power Meter, Digital Power Meter. I have installed it according to the diagram which came with it.I used transformers 300/5
    After installing I realized it was counting wrong..I am consuming about 10Kwh (for example) it counts only 6 Kwh.
    How can I measure if this meter works fine?
    From where do I have to start!!!


    First : you should programme the digital meter for it's CT ratio to show correct power consumption .

    Second  : CT Polarity should be same on meter trminal

    Third : CT Shoudl be measuring Class ie. CL-0.5 or CL1.0

    Four : Phase Sequence in right order ie. R Y b for Potential & Current  as Load side to meter terminal must be in same order


    The CT ratio (300/5) you are using is too big for your actual power consumption.

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