Analysis of a Fracture Fault of 800kV Tank Circuit Breaker Hydraulic Working Cylinder

LI Yan; WU Guo-zhong; XU Xian; BAO Yan-rong

doi:10.13296/j.1001-1609.hva.2012.04.019

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Analysis of a Fracture Fault of 800kV Tank Circuit Breaker Hydraulic Working Cylinder

更新时间：2025-04-26

- Analysis of a Fracture Fault of 800kV Tank Circuit Breaker Hydraulic Working Cylinder
- High VoltageApparatus Vol. 48, Issue 4, Pages: 102-105(2012)
- 作者机构：
  
  宁夏电力公司电力科学研究院
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2012.04.019
  CLC： TM561
- Published：2012
- 稿件说明：
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[1]李岩,吴国忠,徐贤,包艳蓉.一起800kV罐式断路器液压机构工作缸断裂事故分析[J].高压电器,2012,48(04):102-105.

LI Yan, WU Guo-zhong, XU Xian, et al. Analysis of a Fracture Fault of 800kV Tank Circuit Breaker Hydraulic Working Cylinder[J]. High voltageapparatus, 2012, 48(4): 102-105.
[1]李岩,吴国忠,徐贤,包艳蓉.一起800kV罐式断路器液压机构工作缸断裂事故分析[J].高压电器,2012,48(04):102-105. DOI： 10.13296/j.1001-1609.hva.2012.04.019.

LI Yan, WU Guo-zhong, XU Xian, et al. Analysis of a Fracture Fault of 800kV Tank Circuit Breaker Hydraulic Working Cylinder[J]. High voltageapparatus, 2012, 48(4): 102-105. DOI： 10.13296/j.1001-1609.hva.2012.04.019.

摘要

800 kV断路器是保证750 kV输变电线路安全运行的重要开关设备。笔者针对一起800 kV双断口罐式断路器的液压机构工作缸断裂事故

对断裂部位进行了强度校核计算及化学成分、显微组织、力学性能、制造工艺分析。认为生产厂家对液压工作缸进行再次超温热处理

使其产生铸态组织

导致延伸率大幅下降

是造成工作缸断裂的主要原因。

Abstract

800 kV circuit breaker is an important switchgear to ensure the safe operation of 750 kV power transmission and transformation line.In this paper

an analysis is made into a fracture fault of 800 kV tank circuit breaker hydraulic working cylinder.By checking the strength and analyzing the chemical composition

microstructure

mechanical properties and the manufacturing process

it is found that the overheat treatment to the hydraulic working cylinder caused its cast microstructure.The cast microstructure lead to a decline in elongation

which may result in the fracture fault of the hydraulic working cylinder.

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