High-voltage directly-operated air-compressing type SF6 load switch device
A load switch, direct-acting technology, used in high-voltage/high-current switches, high-voltage air circuit breakers, electrical switches, etc., can solve the problems of not being able to meet power distribution needs, complex structure, and poor high-voltage effects.
Inactive Publication Date: 2014-03-19
SHANGHAI HAOSAI ELECTRICAL APPLIANCES
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Problems solved by technology
At present, gas-insulated metal-enclosed switchgear adopts rotary knife switch SF 6 For load switch devices, when closing and opening, the electromagnetic force generated by the current will elongate the arc and cool the arc, which is limited by the inherent characteristics of the principle of magnetic blowing arc extinguishing. This type of SF 6 The load switch device has limited arc extinguishing ability and cannot better meet the needs of power distribution. Chinese patent number: 2006201597928, the disclosed direct-acting pneumatic switch has a complex structure, poor high-voltage effect, and poor arc extinguishing performance
Method used
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[0014] see Figure 1~3 as shown,
[0015] A high-pressure direct-acting compressed air SF 6 In the load switch device, the static contact 2 is provided with an arc starting needle 3, the moving contact assembly 7 is arranged in the arc extinguishing cover 5, and the moving contact assembly 7 is in contact with the inner wall of the arc extinguishing cover 5 to form a closed cavity, which is characterized in that it also includes Switch box 8, contact clip assembly 12, connecting rod 10, crank arm 9, shielding ring 11, busbar 127, the arc extinguishing cover 5 is fixedly connected to the switch box 8, and the moving contact assembly 7 includes moving contacts 73. Arc contact 72, nozzle 71, moving rod 76 and collar 74, the arc contact 72 is arranged between the moving contact 73 and the nozzle 71, the arc contact 72 is fixed on the moving contact 73, the nozzle 71 Fastened with the arc contact 72, one end of the moving rod 76 is fixedly connected with the moving contact 73, th...
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The invention relates to a high-voltage directly-operated air-compressing type SF6 load switch device. The device comprises a static contact, an arc ignition needle, a moving contact assembly, an arc extinguishing cover, a switch box, a contact clamp assembly, a connecting rod, a connecting lever, a shield ring and a busbar, wherein the static contact is fixedly installed at the upper end of the arc extinguishing cover, the static contact is internally provided with the arc ignition needle, the moving contact assembly is disposed at the arc extinguishing cover, the moving contact assembly is in contact with the inner wall of the arc extinguishing cover to form an enclosed cavity, and the arc extinguishing cover is fixedly connected with the switch box. By adopting such a structure, the sealing ring on the moving contact assembly and the inner wall of the arc extinguishing cover form the enclosed cavity, when a load switch is turned off, a mechanism drives the connecting lever to rotate, and the moving contact assembly is driven by the connecting rod to move downwards so that the SF6 gas in the enclosed cavity is compressed, the compressed SF6 gas is sprayed at an extremely high speed from a nozzle to quench the arc between the arc ignition needle and an arc contact.
Description
technical field [0001] The invention relates to a high-pressure direct-acting pneumatic SF 6 A load switch device, especially a high-voltage direct-acting compressed gas SF installed in a gas-insulated metal-enclosed switchgear 6 Load switch device. Background technique [0002] SF 6 , Chinese name: sulfur hexafluoride, appeared in the early 20th century, it is the gas formed when sulfur burns in fluorine gas, SF 6 Due to its excellent insulating performance, arc extinguishing performance and incombustibility, gas is gradually used as a new type of insulating medium for electrical equipment. At present, gas-insulated metal-enclosed switchgear adopts rotary knife switch SF 6 For load switch devices, when closing and opening, the electromagnetic force generated by the current will elongate the arc and cool the arc, which is limited by the inherent characteristics of the principle of magnetic blowing arc extinguishing. This type of SF 6 The load switch device has limited a...
Claims
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IPC IPC(8): H01H33/91
Inventor 汪东邵南银其他发明人请求不公开姓名
Owner SHANGHAI HAOSAI ELECTRICAL APPLIANCES