how can calculate static 3phase 4wire CT & PT operated
energy meter constant when calibrating using refference
meter suppose we have 11kv/110v PT and 30/5A CT, the meter
constant is 160imp/kwh, where meter is showing MW energy?
give me solution which constant i feed in my refference
meter for calibration of energy meter?

Answers were Sorted based on User's Feedback



how can calculate static 3phase 4wire CT & PT operated energy meter constant when calibrating ..

Answer / s.ramesh babu

PT Name Plate details is 11kv/110/root3.
But Your EM name plate details is 415/110/root3.
and CT ratio is 30/5A.

Step:-1
Calculate voltage is 11000/415=26.50
Step:-2
Calculate CT is 50/5=10A.
Step:-3

Now EM multification factor is 26.50*10=265.06.

Is This Answer Correct ?    10 Yes 5 No

how can calculate static 3phase 4wire CT & PT operated energy meter constant when calibrating ..

Answer / shah

This question set is prepared based on India's requirement.

Is This Answer Correct ?    1 Yes 0 No

how can calculate static 3phase 4wire CT & PT operated energy meter constant when calibrating ..

Answer / k.prakashchandra

Meter constant is 100x6 =600 if ct and pt ratios are not
incorporated (see name plate).160 imp/Kwh is not the meter
constant and it is like rev/Kwh in EM meters

Is This Answer Correct ?    0 Yes 3 No

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