NIB FOR PURCHASE OF 56 SETS OF 245KV, 2000A MOTORIZED ISOLATOR WITH SEB, 28 SETS OF 245KV, 2000A MOTORIZED ISOLATOR WITH DEB, 235 SETS OF 245KV, 2000A MOTORISED ISOLATOR WITHOUT EB AND 99 SETS OF 245KV, 2000A MOTORIZED TANDEM ISOLATOR ON RATE CONTRAC