Outdoor high-voltage AC three-pole double-earthing isolating switch

Abstract

The invention provides an outdoor high-voltage AC three-pole double-earthing isolating switch, which is formed by connecting three groups of single-pole isolating switches with the same structure. A contact finger end earthing bus at one end of each group of single-pole isolating switch is in bolted connection with a contact finger end earthing inter-phase drive rod, and is connected with a contact finger end earthed pole; and a contact stick end earthing bus is in bolted connection with a contact stick end earthing inter-phase drive rod, and is connected with a contact stick end earthed poleto realize three-pole double-earthing. The isolating switch has the advantages that: the isolating switch adopts the simultaneous power supply of three phases, and the independent earthing of a leading-in end and a leading-out end can be realized; the product can be used for 10,000 times with high reliability, has reliable performance, greatly reduces the workload of field maintenance and reducesthe running cost; the isolating switch has vast market prospect, and is widely applied to electric railways; the isolating switch has the cost of 17,000 yuan per set and the yield of 2,000 sets per year, and produces the annual sales revenues of 3.4 to 4.4 million yuan so as to achieve remarkable economic benefits; and after forming a certain scale, the product can be exported to the international market to earn foreign exchanges for China.

Description

technical field [0001] The invention relates to an outdoor high-voltage AC three-pole double-ground isolating switch, which is used for switching lines in electrified railway substations and catenary lines when there is voltage and no load. Background technique [0002] The outdoor high-voltage AC isolating switch is a necessary product for the normal operation of the railway. It undertakes the normal power supply during the operation of the railway locomotive and the power failure isolation task when a fault occurs, and is the main equipment to ensure the normal operation of the railway. For the sake of safety, the isolating switch should be reliably grounded when it is opened, so there is a grounding isolating switch. [0003] At present, the three-pole grounding separation at home and abroad is generally grounded at one end, which is less secure than the grounding at both ends of the incoming and outgoing lines. However, how to realize the grounding of the input and outp...

AI Technical Summary

Problems solved by technology

[0003] At present, the three-pole grounding separation at home and abroad is generally grounded at one end, which is less safe than the grounding at both ends of the incoming and outgoing lines.

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