Installation of 275 kV XLPE Cables in The Long And Steep Slope Tunnel

This paper describes about the actual laying of 275 kV XLPE cables in Tamahara pumped-storage power station of The Tokyo Electric Power Company, Incorporation which have very steep slope tunnel in the cable route. We have installed 4 circuits of 275 kV XLPE cables which is approximate 7.4 km as a whole length and outdoor terminations and reversed type oil immersed terminations.