Successful long-term testing of three-core bundled high-temperature superconducting cables (2002)
A long-term test lasting about one year was conducted! The favorable characteristics of high-temperature superconducting cables were confirmed.
Sumitomo Electric and Tokyo Electric Power Company, together with the Central Research Institute of Electric Power Industry, conducted a long-term test of approximately one year on the "three-core bundled high-temperature superconducting cable," which was successfully completed, confirming the excellent characteristics of the high-temperature superconducting cable. 【Cable System Specifications】 ■ Rated Voltage: 66kVrms ■ Rated Current: 1kArms ■ Rated Capacity: 114MVA Superconducting Cable ・ Type: Three-core bundled ・ Length: 100m ・ Insulation: PPLP (Poly-Propylene Laminated Paper) liquid nitrogen impregnated ・ Three-phase branching: 2 ・ Terminals: 6 (air terminals) ■ Installation: Above ground installation (partially installed in 150mm conduit) ■ Cooling System: Supercooled liquid nitrogen circulation *For more details, please refer to the PDF document or feel free to contact us.
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【Test Results】 <Electrical Characteristics> ■ Voltage: AC 130kV (3 hours), Impulse - 385kV x 3 shots ■ Capacitance, tanδ: 0.24μF/km, 0.08% at 77K ■ V-t Characteristics: n-value > 20 (Partial Discharge Occurrence Level) ■ Critical Current: Ic > 2700A (DC) <Mechanical Characteristics> ■ Bending Test: No degradation at a bending diameter of 1.9m <Thermal Characteristics> ■ AC Loss (3-phase): 2.0W/m at 1kA ■ Thermal Ingress: 2.5W/m ■ Long-term Characteristics: Operated for over 2400 hours, cooled for over 6500 hours <System Performance> ■ Load Variation: 1000A for 16 hours + 200A for 8 hours (January) ■ Overcurrent: AC 1500A ■ Cooling Cycle: No degradation after 4 cycles (four seasons) *For more details, please refer to the PDF document or feel free to contact us.
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For more details, please refer to the PDF document or feel free to contact us.
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Sanpo Koki Co., Ltd. utilizes science and technology to strive for environmental conservation and manufactures general scientific machinery and pollution prevention equipment. Our strength lies in our technological capabilities that can cater to a wide range of fields, including chemistry, food, environment, and IT equipment. In addition to scientific instruments, food machinery, and pollution prevention equipment, we also handle a variety of pressure vessels (Type 1 and Type 2 specified equipment for high-pressure gases), cryogenic and ultra-high vacuum devices (containers), among many others.