Retrofitting Of Old Static Lbb Relays With New Numerical Iec 61850 Compliant Lbb Relays & Providing Dedicated Ct Core For Lbb Protection At 400 Kv & 220 Kv Bays At 400 Kv Karad, New Koyna & Talandge S/Stn Under Karad Zone Against Mbr No.1097 Dtd. 05.08.2024 On Turnkey Basis (EXPIRED)