SF6 gas-insulated switchgear ZF27-800

high-voltageindustrialfor electrical networks

ZF27-800 GIS, developed independently by Pinggao for controling, measuring, protecting and transforming the electric transmission line, consists of circuit breaker, current transformer, disconnector, earthing switch, main busbar, bushing and surge arrester, etc. The interrupter of circuit breaker is designed as double-break structure, and the hydraulic operating mechanism avoids the oil leak and slow-opening at zero pressure. With rated current of 5000A and rated short-circuit breaking current of 50kA, this kind of GIS have been adopted in Substation GuanTing of 750kV power transmission project in Northwest China. 1 All the hydraulic pipelines are set inside to avoid the leakage, which is domestic initiate. 2 High current carrying performance with the rated current of 5000A. 3 Excellent insulating level has achieved the high standard of DL/T593-2006. 4 High mechanical endurance and reliability.