purchase of two layer carbon brushes for rotor earth fault detection system of generators and tg shaft earthing for tand c-iv stps, sarni. , two layer carbon brushes for rotor earth fault detection system of generators and tg shaft earthing , two layer carbon brush with teflon attachment and flexible copper lead with lugs for 250 mw bhel make tg set silver graphatised and natural graphatised brush size and grade- 30x20x8 mm with teflon attachment (asg1+hm100) with flexible copper leads (1.5 sqmm) round cu lugs of 6 mm id and insulated sleeve length upto lug 100mm make:-bhel, vidut carbon, tirupati carbon, ncbpl only. (as per drawing attached) , two layer carbon brushe for tg shaft earthing (right) of 250 mw bhel make tg set bhel part no-1139160100000003 silver graphatised and natural graphatised brush size and grade- 30x20x8 mm (asg1+hm100) with flexible copper leads (1.5 sqmm) length upto lug 100 mm make:-bhel, vidut carbon, tirupati carbon, ncbpl only , two layer carbon brushe for tg shaft earthing (left) of 250 mw bhel make tg set bhel part no-1139160100000001 silver graphatised and natural graphatised brush size and grade- 30x20x8 mm (asg1+hm100) with flexible copper leads (1.5 sqmm) length upto lug 100 mm make:-bhel, vidut carbon, tirupati carbon, ncbpl only => limited