Title:
HIGH-SPEED GROUNDING SWITCH AND GROUNDING SWITCH ASSEMBLY UNIT COMPOSED THEREOF
Document Type and Number:
WIPO Patent Application WO/2015/043460
Kind Code:
A1
Abstract:
A high-speed grounding switch and a grounding switch assembly unit composed thereof in the field of power transmission equipment. The high-speed grounding switch comprises a sulfur hexafluoride arc-extinguishing device being placed in an airtight air chamber of a shell of a corresponding assembly unit while in use, wherein the sulfur hexafluoride arc-extinguishing device comprises a static end assembly and a dynamic end assembly. The static end assembly comprises a static end conductor (7) and a static arc contact (9) electrically connected to the static end conductor (7). Electrically-conductive rod connection structures respectively used for fixedly and electrically connecting to adjacent ends of two corresponding electrically-conductive rods (3) are arranged on the static end conductor (7). The dynamic end assembly comprises a dynamic arc contact (11) used for grounding a corresponding fault phase by way of closing with the static arc contact (9). The high-speed grounding switch also comprises an operating mechanism (8) with a power output end being connected to the dynamic arc contact (11) in a driving mode. While in use, the electrically-conductive rods (3) of the grounding switch assembly unit are conductively connected to corresponding single phases. When a grounding short-circuit fault occurs in a single phase of an operating circuit, one-time electric arc is produced, the failed single phase is called a fault phase, circuit breakers at the two ends of the fault phase trip, and the one-time electric arc is extinguished. The other two energized phases continuously provide a current to a fault point through electrostatic coupling and electromagnetic coupling, so that a secondary-arc current is generated. At the moment, the operating mechanism (8) drives the dynamic arc contact and the static arc contact to close. The fault phase is grounded through the static arc contact (9) and the dynamic arc contact (11). A secondary-arc electric arc is extinguished. Subsequently, the operating mechanism (8) drives the dynamic arc contact and the static arc contact to open. The static arc contact and the dynamic arc contact in the sulfur hexafluoride arc-extinguishing device are used for grounding, so that smooth arc extinguishing can be guaranteed when the dynamic arc contact and the static arc contact are opened, thereby guaranteeing the successful reclosing of subsequent circuit breakers.
More Like This:
| JPS5856932 | [Title of the Invention] Switch |
| JPH0512962 | SWITCH DEVICE |
Inventors:
GUO YUJING (CN)
ZHONG JIANYING (CN)
ZHONG JIANYING (CN)
Application Number:
PCT/CN2014/087223
Publication Date:
April 02, 2015
Filing Date:
September 23, 2014
Export Citation:
Assignee:
STATE GRID CORP CHINA (CN)
HENAN PING GAO ELECTRIC CO LTD (CN)
PING GAO GROUP CO LTD (CN)
GUO YUJING (CN)
ZHONG JIANYING (CN)
HENAN PING GAO ELECTRIC CO LTD (CN)
PING GAO GROUP CO LTD (CN)
GUO YUJING (CN)
ZHONG JIANYING (CN)
International Classes:
H01H33/04
Foreign References:
| CN101383244A | 2009-03-11 | |||
| CN201057622Y | 2008-05-07 | |||
| CN103198969A | 2013-07-10 |
Other References:
HE, BAINA: "The Investigation of High Speed Grounding Switches on Secondary Arc in 800kV GIS", SHENYANG UNIVERSITY OF TECHNOLOGY DISSERTATION, 31 October 2006 (2006-10-31), pages 36 - 50
Attorney, Agent or Firm:
ZHENGZHOU RUIXIN INTELLECTUAL PROPERTY AGENCY CO., LTD (CN)
郑州睿信知识产权代理有限公司 (CN)
郑州睿信知识产权代理有限公司 (CN)
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