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Can we use droop CT in neutral in place of W phase of
alternator ?
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Answer Posted / kj
The droop CT can be placed anywhere in the W phase. In
series star connected alternator it can be placed in the
output end, centre tap or neutral (star point end of the W
phase winding).
Remember it must be inserted as per the instructions as to
how many parallel coils pass through it and P1 must always
be in the correct direction. Always have P1 towards the
star point.
I have done this a number of times where the room around
the windings do not allow fitting elsewhere.
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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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