110 kV复合绝缘子硅橡胶伞裙失效机理分析

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Abstract Silicone rubber (SIR) is the key material of ultra-high voltage insulators. To ensure its service stability, evaluating the performance of insulator sheds is vital. This paper presents a comparative analysis of the SIR sheds of two batches (Ⅰ and Ⅱ) of plant A and (Ⅲ) 110 kV composite insulators of Plant B. The performance of SIR sheds is investingated by means of simultaneous thermogravimetry and differential thermal analysis (TG-DSC), mechanical property testing and micromorphology and other test characterisation methods. The results show that differences in components and content, filler dispersion and crosslinking are crucial to insulator SIR performance. Sample Ⅱ has the best tensile strength, elongation at break and contact angle of 2.51 MPa, 150.78% and 97.06° due to the appropriate composition, uniform dispersion and moderate crosslinking. However, Samples I and Ⅲ have contact angles below the standard requirement, thus lacking hydrophobicity.

Key words： insulator silicone rubber shed thermal analysis mechanical property micro morphology

Received: 24 March 2025

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	Articles by authors
	ZHANG Weirui
	CUI Xiaofeng
	HUANG Ming
	JIANG Jing
	ZHANG Na

Cite this article:

ZHANG Weirui,CUI Xiaofeng,HUANG Ming等. Analysis on the failure mechanism of silicone rubber sheds for 110 kV composite insulators[J]. Electrical Engineering, 2025, 26(8): 23-30.

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https://dqjs.cesmedia.cn/EN/Y2025/V26/I8/23

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