Study on Difference Between Brittle Fracture and Decay-like Fracture of Composite Insulator

LU Ming; GAO Chao; WU Yansong; LI Ziyue; MEI Hongwei; WANG Liming

doi:10.13296/j.1001-1609.hva.2022.06.003

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Study on Difference Between Brittle Fracture and Decay-like Fracture of Composite Insulator

更新时间：2025-04-26

- Study on Difference Between Brittle Fracture and Decay-like Fracture of Composite Insulator
- High VoltageApparatus Vol. 58, Issue 6, Pages: 17-23(2022)
- 作者机构：
  
  1. 河南省电力线路舞动防治技术重点实验室国网河南省电力公司电力科学研究院
  2. 清华大学深圳国际研究生院
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2022.06.003
  CLC： TM216
- Published：2022
- 稿件说明：
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LU Ming, GAO Chao, WU Yansong, et al. Study on Difference Between Brittle Fracture and Decay-like Fracture of Composite Insulator[J]. High voltageapparatus, 2022, 58(6): 17-23.
DOI：

LU Ming, GAO Chao, WU Yansong, et al. Study on Difference Between Brittle Fracture and Decay-like Fracture of Composite Insulator[J]. High voltageapparatus, 2022, 58(6): 17-23. DOI： 10.13296/j.1001-1609.hva.2022.06.003.

摘要

为了深入地研究复合绝缘子的酥朽断裂，获得其与脆断的异同，文中对现场酥断故障复合绝缘子进行了外观形貌检查、扫描电镜分析、傅里叶光谱分析以及X射线扫描分析，并且将结果与脆断绝缘子进行了相应地对比分析。分析表明：酥朽绝缘子断口颜色不再正常，芯棒变软劣化，脆断端口颜色正常；与脆断相比，酥朽样品的电镜结果出现了树脂的气泡现象，纤维丝裸露更严重；元素分析表明，两者都受到了硝酸入侵，都出现了芯棒的水解，但酥朽时更严重。基于实验结果，对两者的断裂机理进行了总结分析，得出放电与酸是造成这类故障的共同因素。

Abstract

In order to study deeply the decay-like fracture of composite insulator and obtain the similarities and differences between it and brittle fracture

the appearance inspection

scanning electron microscope analysis

Fourier spectrum analysis and X-ray scanning analysis of the composite insulator with decay-like fracture are carried out in this paper. Meanwhile

the corresponding comparison and analysis of the results the brittle fracture insulators are performed. The analysis shows that the color of decay-like fracture of composite insulator is no longer normal and the core rod becomes soft and deteriorated. However

the color of the brittle port is normal. Compared with brittle fracture composite insulator

the results of electron microscopy of decay-like composite insulator appears bubbles in the resin and the fiber exposure is more serious. The elemental analysis shows that both of them are invaded by nitric acid and the hydrolysis of mandrils occurs and is

in case of brittle fracture

more serious. On the basis of experimental results

the fracture mechanism of the two materials is summarized and analyzed. And it is concluded that discharge and acid are the common factors causing this kind of fault.

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