Three-station isolating/grounding switch adopting floating structure and self-adaptive conductive contact

Abstract

The invention discloses a three-station isolating / grounding switch which adopts a floating structure and self-adaptive conductive contact and is mounted in a closed metal grounding shell filled with an insulating medium. The three-station isolating / grounding switch comprises an upper static contact, a lower static contact and a movable contact, wherein the contact seat of the movable contact is mounted on a transmission insulated shaft, a U-shaped conductor is arranged below the transmission insulated shaft, conductively connected with a main loop conductor arranged outside the switch, and directly fixed on the main loop conductor or fixed at the bottom of the shell through a pan-type insulator, and the outline of the contact seat of the movable contact is longitudinally arranged in a groove of the U-shaped conductor and keeps electric contact with the groove through sensing fingers. The three-station isolating / grounding switch can be driven by an operation mechanism without misoperation between separation and grounding and can save electric operation linkage between the separation and the grounding. Moreover, due to the adoption of a floating-type self-adaptive conductive contact structure, the switch is easy to process and assemble and can also greatly lower the size accuracy requirement in assembly.

Description

technical field [0001] The invention relates to an electric high-voltage switchgear, and more specifically relates to a three-position isolation / grounding switch adopting a floating structure and self-adaptive conductive contact. Background technique [0002] High-voltage isolating / grounding switches are an important guarantee for the safe operation and maintenance of power systems. The reliability of the high-voltage isolation / grounding switch is related to the reliability of the power system operation. The high-voltage isolating switch uses obvious visible segmental gaps to isolate the high-voltage power supply and ensure safe maintenance. The grounding switch is based on the subsection gap, so that the parts that need to be repaired can be kept at zero potential through the grounding switch to ensure the safety and reliability of the maintenance work. [0003] A common three-position high-voltage isolating / grounding switch includes a moving contact and two static contac...

AI Technical Summary

Problems solved by technology

In this way, during the installation and debugging process, since the dynamic and static contacts have no definite installation reference, and the dynamic and static contacts themselves are limited by the machining accuracy, there may be machining errors, and the installation position cannot be accurately determined by measurement, so often Only after the installation is completed, the quality of the assembly can be judged by the electrical performance inspection

Once unqualified products are detected, they have to be disassembled again, which greatly affects production efficiency and easily causes damage to related parts

[0005] Since the three-position sulfur hexafluoride isolation / grounding switch is widely used in the existing power system, based on the above reasons, there are assembly process and assembly quality problems in the assembly and commissioning, and even the assembly quality problems of some equipment, in the power system Failure to find out in time during the performance inspection makes the product enter the power system with hidden dangers

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