Answer / vels

for calculating the active power ,reactive power ,current etc in Energy meter. since the energy meter is having separate CT and PT ratio and field is having different CT and PT ratio
hence MF is required
formula
actual CT*PT ratio/meter CT*PT ratio

Answer / shakirullah khan

The multiplying factor = 0.13 (from the capacitor estimation table above) .... where the low voltage load is supplied from several distribution substations,.

WHAT SHOULD BE THE BEST CURRENT RATINGS (PRIMARY / SECONDARY)FOR A CT INSTALLED AT THE INCOMING 11KV PANE? WILL IT BE CALCULATED ON THE BASES OF MAXIMUM DEMANT VALUE OR ON SUM OF ALL TRANSFORMER'S KVA? NOMALLY MAX DEMAND REPRESENT THE MAXIMUM OPERATING LOAD OF THE PLANT AND TOTAL KVA OF (SAY 5 NUMBERS TRANSFORMERS) REPRESENT THE CONNECTED LOAD. WHICH i.e. MAX DEMAND KVA OR CONNECTED KVA ARE BETTER TO USE FOR CT CURRENT CALCULATION? PLEASE ANSWER.

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