Answer / rajendra.s

no my friend,it depends on APFC relay,
1.in L&T make APFC relay ct is looped in R-phase.
2.in Sentron make APFC relay ct is looped in Y-phase.
3.in Sycon make APFC relay ct is looped in B-phase.

if you have any dout see all above relays wiring diagram.
For measuring PF APFC relay required any two phases & one CT sence on remaining phase from main PCC Phase.
Eg.(R-Y phase & BCT from Main Panel)

From--Rajendra Sawant
Miraj.

Answer / zia

Good day friends
some time some of factory's lode not same in R,Y,B.
Example R=155amp, y=140amp, b=145amp which one we selected
for apfc relay for sense observing p-f . we are selected the
maximum amp flow phase.it can be R or Y or B. for good pf
rating.
so its a CT depends on the flowing amp of the phase

Answer / rajendra.s

Thanks Zia Mam,For Sharing Additional information,but what about the manufacturing relay companys who manufacture the relay which has R,Y,B phase Selection of CT which i have mentioned in above answer,should we select our relay as per our Phase Load.

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