Answer / ravinder kumar

when the CT ratio & Meter CT Ratio is different then we have to multiply the meter reading by a factor i.e. called MF to find exact value.
MF= (field CTR*field PTR)/(meter CTR*meter PTR)

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hi i am aziz electrical associate engineer. i am faceing problem in acs800 vvvf drive.it is tripping wothout any alarm/fault.i cheaked all parameters and fault function of drive, all are correct as well as communication parameters.but still it is tripping (drive is tripping in running position not in starting)

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What is VCB? Where it is installed?

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where was current transformer protection units used and why??

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