Generator Minor & Major Overhauling Of Gtg#02 (Serial No:1493) (30.9 Mw, Vpi, 3000Rpm, Obl, Oa) And Gtg#04 (Serial No: 1491) (30.9 Mw, Vpi, 3000Rpm, Obl, Oa) At Iocl Panipat Refinery