Rapid grounding switch

Abstract

The invention discloses a rapid grounding switch, which solves the problems in the prior art that the breaking speed between grounding fractures of a rapid grounding switch is slow, an effect of rapidly breaking induced current is difficult to realize, and the ace burning is uneasy to put out, SF6 gas with a good insulating property must be taken as insulating gas in the prior art for achieving the purpose of rapidly breaking induced currents, thereby causing environmental pollution. The rapid grounding switch disclosed by the invention is characterized in that a moving conductor is arranged in a cavity of a grounding conductor, a conductive tube is installed in the cavity of an insulating conductor, a breaking spring and a conducting rod are arranged in the cavity of the moving conductor, and a sliding shaft arranged on the moving conductor can slide in a U-shaped groove arranged at the front end of a driving arm. The rapid grounding switch disclosed by the invention has the advantages that because the breaking spring is taken as a dynamic force pf the rapid breaking of the grounding switch, and through the rapid breaking of the conducting rod and the generation of compressed air blowing, an effect of instant arc extinguishing between the grounding fractures is achieved, so that the rapid breaking of the grounding switch is realized, therefore, clean dry air or nitrogen gas can be adopted as insulating gas, therefore equipment becomes more environmentally-friendly.

Description

technical field [0001] The invention belongs to the technical field of high-voltage electric power, and in particular relates to a fast grounding switch capable of closing short-circuit current and breaking induced current in insulating metal-enclosed switchgear for clean dry air or nitrogen. Background technique [0002] The quick grounding switch is an important electrical component on the fixed switchgear, which can realize the quick grounding of the bus bar or cable. As a safety device for protection and maintenance, it plays a very important role in the entire power supply system. In the prior art, such as the quick grounding switch disclosed in the patent with the application number 200720064391.9 titled "quick grounding switch for high-voltage electrical appliances", the technical solution adopted is that the moving contact rod passes through the first connecting plate and the second connecting plate of the hinge. The connecting plate is connected with the transmissio...

AI Technical Summary

Problems solved by technology

The breaking speed of the moving contact rod of the above structure is provided by the transmission shaft of the electric spring operating mechanism. Since the transmission shaft of the operating mechanism needs to be transmitted through the second connecting plate and the first connecting plate, the breaking speed between the grounding fractures It is still slow, so if dry air or nitrogen is filled between the grounding fractures, it is very difficult to break the induced current, and the arc is not easy to extinguish. In order to achieve the purpose of quickly breaking the induced current, the existing technology only uses a The SF6 gas is used as an insulating gas, which will cause environmental pollution

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