Gas insulated switchgear

Abstract

Provided is a gas insulated switchgear which has a small frictional force and a small wear volume in a slide portion and is capable of maintaining the state of having the small frictional force and the small wear volume for a long period of time. In a container of a bus-integrated disconnection switch (27) of the gas insulated switchgear (10), an insulation gas is contained, and a movable side contact portion (31), a fixed side contact portion (32), and a movable contact unit (33) are provided, to constitute a disconnection portion (30). A hard carbon film (50) is formed on an outer circumferential surface of the movable contact unit (33) excluding a part where the movable contact unit (33) is in contact with a contact point terminal (32a) of the fixed side contact portion (32) in the state in which the movable contact unit (33) is inserted into the fixed side contact portion (32) and electrically connected therewith and a part where the movable contact unit (33) is in contact with a contact point terminal (31a) of the movable side contact portion (31) in the state where in which the movable contact unit (33) is electrically shut off.

Description

technical field [0001] Embodiments of the present invention relate to a gas insulated switchgear. Background technique [0002] Gas insulated switchgear includes switches and busbars for high power. The switch for high power is a breaker that cuts off a large current in the event of an accident, a circuit breaker that connects or cuts off a circuit, and a grounding switch that obtains grounding. etc., the bus is connected to a circuit such as a transformer. For example, if a gas-insulated switchgear fails, major problems such as power outages may occur in the power transmission system. Therefore, in the gas insulated switchgear, high reliability is required in terms of performance, and a maintenance-free device that does not require power system shutdown is required. [0003] As mentioned above, the gas insulated switchgear includes various switches, and there are many sliding parts in the switch mechanism part or the contact part. Moreover, when separating a bus bar, the...

AI Technical Summary

Problems solved by technology

[0010] In the above-mentioned conventional gas insulated switchgear, there is a problem that the grease or lubricating oil in the sliding part scatters or deteriorates due to long-term use, and the frictional force increases.

[0011] In addition, when the sliding area of ​​the sliding part in the conventional gas insulated switchgear is large, low-friction materials such as synthetic resin materials represented by Teflon (registered trademark) are sometimes used, but due to long-term use, Sometimes the low friction material peels off from the substrate

Therefore, there is a problem in the adhesion with the substrate

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