@SEIRdkumar
In this video , we discussed group relay circuit.
In previous videos (#1 ) we learned how to pick up WNR/WRR & It's proving WNPR/WRPR.
NOW (#3 )POINT GROUP RELAY CIRCUIT
NR:::::::- The First relay operate in group relay, is N/R .
work :- To inform command came to operate the point and during point obstruction , extra time provide to pick up the WCR relay, and its help to pick up XR relay also.
NOW, How it's pickup , let discuss circuit
WNPR PU + W(R)R PU + XR DO = N/R PU FOR NORMAL
WRPR PU + W(N)R PU + XR DO = N/R PU FOR REVERSE
Also provide capasitor in its parallel to pick up N/R more time after power cut.
W(N)R/W(R)R:::::::- It's pick up according to normal/reverse command .
WNPR PU + WNR DO +N/R ( ONLY IN -VE PATH )= W(N)R PU . ( FOR NORMAL)
WRPR PU + WRR DO = W(R)R PU + N/R PU ( ONLY IN Negative path. (FOR REVERSE)
