procurement of lighting transformer for high masts power supply at gail hazira compressor station. procurement of lighting transformer for high masts power supply at gail hazira compressor station , lighting transformer, 3ph, 50kva, 415v delta / 415v star, 50hz, copper wdg, dry type, cooling: air natural, insulation class: f 3 phase transformer, primary voltage: 415v+-2.5% +5% delta, secondary voltage: 415v star with neutral, primary current: 69.56 a, secondary current 69.56 a, kva: 50 kva, freq: 50 hz, cooling: air natural, copper winding, insulation class: f, dry type, with enclosure. make: indcoil or equivalent for lighting high mast system. , axial flow check valve 20in 600 wcb , api 594, bolting b7 / 3h, face to face dimension 14.5in, both ends flanged to asme b16.5 series a, wnrf