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Rotary load switch contact arc extinguishing system of SF6 ring main unit

A load switch and rotary technology, which is applied in the field of arc extinguishing system of rotary load switch for SF6 gas insulated ring network cabinet, can solve the problems of unstable breaking performance, failure, limited breaking capacity of transfer current, etc., and achieve Improve the ability of breaking and extinguishing arcs, prolong the service life, and maintain the effect of mutual non-interference

Inactive Publication Date: 2011-05-25
XI AN JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limitations of the principle and design, the breaking capacity of this load switch transfer current is limited, the breaking performance is unstable, and failures often occur during the experimental certification process

Method used

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  • Rotary load switch contact arc extinguishing system of SF6 ring main unit
  • Rotary load switch contact arc extinguishing system of SF6 ring main unit
  • Rotary load switch contact arc extinguishing system of SF6 ring main unit

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Experimental program
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Embodiment Construction

[0012] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0013] see figure 1 , 2. The present invention includes a static contact 1, a moving contact 3 corresponding to the static contact 1, and a driving mechanism 4 for driving the moving contact 3. The static contact insulating seat 2 is installed on the static contact 1, and several metal The grid pieces 5 are inlaid side by side on the static contact insulating seat 2, and interphase arc partitions 6 are also installed between the three-phase contacts to enhance the insulation characteristics of the phases during the breaking current process, and the top of the moving contact 3 is installed to prevent arc roots. "Blow-down" insulating sleeve 7.

[0014] see image 3 , The static contact 1 of the present invention adopts a U-shaped magnetization structure to open an elongated slot 8 at the end of the static contact.

[0015] see Figure 4 , The groove 9 is p...

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Abstract

The invention discloses a rotary load switch contact arc extinguishing system of a sulfur hexafluoride (SF6) ring main unit. The system comprises a static contact, a dynamic contact corresponding to the static contact and a driving mechanism for driving the dynamic contact to move; a static contact insulating seat is arranged on the static contact; a plurality of metal grids are inlaid on the static contact insulating seat side by side; and an arc spacing plate is arranged between three-phase contacts. The load switch has simple process, strong arc extinguishing capacity and good on-off stability of transfer current, and meets the requirement of 1750A disjunction by test.

Description

technical field [0001] The invention relates to an electric switch, in particular to a rotary load switch contact arc extinguishing system for an SF6 gas insulated ring network cabinet. Background technique [0002] Rotary load switches are widely used in the SF6 ring network cabinet products of major electrical appliances companies today. This kind of switch has a mature mechanism and a simple arc extinguishing principle. Cool the arc, or rely on the arc suction coil, magnetic blower, etc. to make the arc longer and cool to extinguish. However, due to the limitation of principle and design, the breaking capacity of this kind of load switch transferring current is limited, the breaking performance is unstable, and failures often occur in the process of experimental certification. Contents of the invention [0003] The purpose of the present invention is to provide a SF6 ring network cabinet rotary load switch contact arc extinguishing system with strong arc extinguishing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H33/08H01H33/10
Inventor 吴翊独田娃荣命哲史强裴军戴俊杨飞胡正勇
Owner XI AN JIAOTONG UNIV
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