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High-voltage direct-current isolating switch

An isolation switch, high voltage DC technology, applied in electrical switches, air switch parts, high voltage air circuit breakers, etc., to achieve the effect of extending service life, use stability, and good protection

Active Publication Date: 2020-03-24
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, for the DC high-voltage transmission system, the long-term current flow capacity, short-circuit current resistance and large overload capacity of the high-voltage DC disconnector are the bottlenecks restricting the development of the high-voltage equipment.

Method used

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  • High-voltage direct-current isolating switch

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Experimental program
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Embodiment Construction

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

[0030] In the present invention, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear" , "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", etc. indicate the orientation or positional relationship Based on the orientation or positional relationship shown in the drawings, it is only for the convenience of descr...

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PUM

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Abstract

The invention provides a high-voltage direct-current isolating switch. The high-voltage direct-current isolating switch comprises a bracket, a movable side post insulator and a static side post insulator fixedly arranged on the bracket at an interval, and the switch further comprises a conductive knife switch arranged on the movable side post insulator, and a static contact unit arranged on the static side post insulator. The conductive knife switch comprises a first conductive tube with one end hinged to the movable side supporting insulator and a second conductive tube with one end hinged tothe other end of the first conductive tube, a movable contact is arranged on the second conductive tube, and a sealing part is arranged at the end, away from the first conductive tube, of the secondconductive tube. The high-voltage direct-current isolating switch provided by the invention has relatively good stability and relatively long service life.

Description

technical field [0001] The invention relates to the technical field of electric equipment, in particular to a high-voltage direct current isolating switch. Background technique [0002] For the multi-terminal DC transmission system, it is necessary for the DC circuit breaker to operate to remove the faults on the DC line and avoid the blocking protection of each converter station in time, so as to ensure that only the faulty line is cut off and the rest of the lines can work normally. With the development of multi-terminal DC transmission systems, DC circuit breakers have become a research hotspot in recent years. Among the currently used hybrid DC circuit breakers, the main component that limits the operating time of the DC circuit breaker is the high-voltage DC fast disconnector. It must have strong long-term current flow and the ability to withstand large overloads, and its anti-pollution insulation level and reliability requirements are higher than those of AC isolating...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H31/02H01H1/64
CPCH01H31/026H01H31/023H01H1/64
Inventor 郭磊张伟王宗耀曹洋田彬李林杰周芳熠
Owner STATE GRID CORP OF CHINA