AC 154㎸ 3심 해저케이블 시스템 개발

154㎸ 3core XLPE submarine cable transmission system was used supply power from mainland to island and connect to the grid of off-shore wind farm. This submarine cable system consists of the three core XLPE cables , fiber-optic submarine cable for telecommunication, flexible joint for factory joint, joint box for field repair joint and termination. The termination for land cable were used for this test. Therefore In this paper 3 core XLPE submarine cable, repair flexible joint for power cable and fiber optic cable joint was described. In order to verify the mechanical and electrical performances for cable and joint, the test was carried out. The mechanical test and electrical test were performed for the 3 core submarine cable and one rigid joint box for three core cable and fiber-optic cable in accordance with CIGRE recommendations(Electra No.171) and IEC 60840. The test results showed that they had sufficient properties and reliability.