500 kV aluminum-sheathed XLPE cable in a 96 m vertical shaft

Three 500 kV XLPE cable circuits were supplied and installed in a 96 m vertical shaft at Tianhuangping pumped storage power station in the P.R. of China. The cable was specially designed to prevent the cable core from slippage and to compensate radial expansion and contraction of the thick insulation. A hauling machine featuring regenerative braking was developed and utilized to vertically install the cable. The cable laying work was carried out by Hitachi Cable Ltd. In collaboration with an installation contractor appointed by the owner. The first 500 kV XLPE cable circuit was put into service successfully in July, 1998 and the second one in July, 1999. The construction of the remaining circuit is in progress and will be completed by the end of 1999