Great sir. Iam having one more doubt. I have seen a drawing in which current sensing element of y phase connected in neutral. Can u explain about that?
If Y phase CT is absent at any site then you can use summation of R & B phase relay current output (with polarity reversed) to Y phase relay coil. But earthfault protection is not possible without a missing CT. Generally its done in metering circuit . In 3P3W meter also Y phase CT is not required.
Great sir.
Iam having one more doubt. I have seen a drawing in which current sensing element of y phase connected in neutral. Can u explain about that?
Please send the drawing.
If Y phase CT is absent at any site then you can use summation of R & B phase relay current output (with polarity reversed) to Y phase relay coil. But earthfault protection is not possible without a missing CT. Generally its done in metering circuit . In 3P3W meter also Y phase CT is not required.
@@eddycurrent1187 can u plz give me your number or mail ID
avradeep.manuals@gmail.com
Sir ,
please provide the drawing of ckt you explained
Thank you