Site examining and repairing method for electric SF6 switch

Abstract

The invention discloses a field overhaul method for an SF6 switch used for electric power, and solves field overhaul problems for sulphur hexafluoride switch equipment. The field overhaul method finishes the field overhaul through the steps of testing and inspecting; recovering and treating an SF6 gas; dismounting a connecting pipe line for a body and a mechanism; dismounting the switch body, elements and devices in the mechanism; performing an arc extinguishing chamber disintegrating overhaul on the body phase by phase in a dustless purified field overhaul workshop and an equipment field overhaul workshop; overhauling an operational mechanism; testing mechanical characteristic, insulation and pressure resistance; recovering the field, installing and testing after the overhaul; protecting a connecting wire; and performing a transmission experiment, thereby finishing the field overhaul. The field overhaul method solves the problems such as long outage time, high transport risk and high cost which are caused by overhauling the sulphur hexafluoride switch in a manufacture factory.

Description

technical field [0001] The invention relates to an on-site maintenance method for an SF6 switch for electric power, in particular solving the problem of on-site maintenance of sulfur hexafluoride switch equipment. Background technique [0002] Sulfur hexafluoride gas has excellent electrical, physical and chemical properties, so sulfur hexafluoride circuit breakers and fully enclosed combined electrical appliances using sulfur hexafluoride gas as arc extinguishing and insulating medium are highly valued by the manufacturing and user departments. From the advent of the first SF6 circuit breaker in the 1950s to the improvement of the arc extinguishing device in the 1970s to solve the technical problems of sealing structure and water management, it has rapidly developed into one of the main varieties of high-voltage circuit breakers. As the manufacturing technology of sulfur hexafluoride switchgear becomes more and more mature, various imported and domestic sulfur hexafluoride ...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of long power outage time, high transportation risk and high cost caused by the SF6 switch returning to the factory for maintenance, the present invention provides an on-site maintenance method for the SF6 switch for electric power to realize the on-site disassembly and maintenance of the SF6 switch. It can greatly shorten the time for power outage maintenance and accident repair, ensure timely elimination of equipment defects and hidden dangers, prolong the service life of equipment for 5-10 years, and improve the health level of equipment and the reliability of power supply of the power grid