A contact system and a single-pole interrupter and load switch using the contact system

Abstract

The invention provides a contact head system, a one pole arc-extinguishing chamber employing the same and a load switch. The contact head system comprises a static contact head seat arranged on one end of an insulating cylinder, a static contact head is arranged on the static contact head seat, and an outer periphery is provided with an insulating support rack; an arc extinguishing disc is fixed on one end, facing toward a movable contact rod, of the insulating support rack; the arc extinguishing disc is provided with a via hole through which the movable contact rod can run and can be plugged in or separated from the static contact head, the insulating support rack is provided with an arc extinguishing wire coil, and one end of the arc extinguishing wire coil is connected with an arc extinguishing disc while the other end is connected with the static contact head seat. The beneficial effects of the contact head system, the one pole arc-extinguishing chamber employing the same and the load switch are that the arc-extinguishing chamber is simple and compact in structure and strong in arc extinguishing capability, all of an arc extinguishing structure is arranged on one side of the static contact head seat, and therefore the movable contact rod can be the only one moving part and the quantity of moving parts can be greatly reduced; a load for an operation mechanism can be lowered, and opening and closing performance of movable and static contact heads can be improved.

Description

technical field [0001] The invention relates to a contact system and a single-pole arc extinguishing chamber and a load switch using the contact system. Background technique [0002] In recent years, the inflatable load switch has high reliability due to the use of sulfur hexafluoride gas with good insulation performance as the arc extinguishing or breaking medium, and is especially suitable for outdoor ring network cabinets and prepackaged boxes of secondary power distribution systems. In the type substation, it can realize maintenance-free and not be affected by the external environment. [0003] The Chinese invention patent application with application publication number CN105489437A and application publication date of 2016.01.08 discloses a compressed air load switch for high-voltage gas-insulated ring network cabinets. The load switch includes an insulating cylinder, and the upper and lower ends of the insulating cylinder are respectively It is equipped with a static c...

AI Technical Summary

Problems solved by technology

[0004] However, due to the use of compressed air arc extinguishing, a series of components such as moving arc contacts, air intake holes, nozzles, guide sleeves, and sealing rings need to be installed on the moving contacts, and arc starting needles need to be installed on the static contacts, so the structure is relatively complicated. , there are many moving parts, which affect the opening and closing performance of the dynamic and static contacts, and increase the load of the operating mechanism. At the same time, the arc extinguishing ability is limited by the size of the guide sleeve and the cylinder, which restricts the overall design of the product.

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