| 摘要 |
PROBLEM TO BE SOLVED: To decrease a gas pressure load applied to a gas-dividing insulating spacer to improve safety of device disassembly work and operation stability.SOLUTION: In a gas-insulation switchgear, a gas decompression bus bar 8a is disposed to be coaxial with a breaker grounding switch 4 and a removable bus 6a, and a gas decompression bus bar 8b is disposed to be coaxial with a main bus breaker 5 and a removable bus 6b. A gas pressure controller 19, when removing the removable buses 6a, 6b, decompresses gas pressure in the gas decompression bus bars 8a, 8b in which the gas pressure is higher than atmospheric-pressure and lower than a rated gas pressure of insulation gas. Thereby, an insulating spacer 7 positioned between the gas decompression bus bar 8a and the breaker grounding switch 4, and an insulating spacer 7 positioned between the gas decompression bus bar 8b and the main bus breaker 5 have atmospheric-pressure on one surface and low gas pressure on the other surface to decrease gas pressure load to the insulating spacers 7. |
