Dielectric Spectroscopy Analysis of Ethylene Propylene Diene Monomer for Cable Insulation Under Force and Thermal Stress

Dielectric Spectroscopy Analysis of Ethylene Propylene Diene Monomer for Cable Insulation Under Force and Thermal Stress

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Ye WANG^a^,^b^,^c, Wei LI^a^,^b^,^c, Zhipeng LEI^a^,^b^,^c, Yang LIU^a^,^b^,^c, Zhijie SHI^a^,^b^,^c, Kunying HAN^a^,^b^,^c, Jiancheng SONG^a^,^b^,^c, Jianhua ZHANG^a^,^b^,^c

Insulating Materials | 2021, 54(12) : 94 - 100

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Insulating Materials | 2021, 54(12): 94-100

• Test and Analysis •

Dielectric Spectroscopy Analysis of Ethylene Propylene Diene Monomer for Cable Insulation Under Force and Thermal Stress

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Ye WANG^a^,^b^,^c, Wei LI^a^,^b^,^c, Zhipeng LEI^a^,^b^,^c, Yang LIU^a^,^b^,^c, Zhijie SHI^a^,^b^,^c, Kunying HAN^a^,^b^,^c, Jiancheng SONG^a^,^b^,^c, Jianhua ZHANG^a^,^b^,^c

Affiliations

^aCollege of Electrical and Power Engineering, Taiyuan University of Technology, Taiyuan 030024, China

^bNational & Provincial Joint Engineering Laboratory of Mining Intelligent Electrical Apparatus Technology, Taiyuan University of Technology, Taiyuan 030024, China

^cShanxi Key Laboratory of Mining Electrical Equipment and Intelligent Control, Taiyuan University of Technology, Taiyuan 030024, China

Published: 2021-12-20 doi: 10.16790/j.cnki.1009-9239.im.2021.12.015

Outline

Abstract

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During the operation process, property deterioration of ethylene propylene diene monomer (EPDM) cable is often caused by multiple stresses. In order to explain the variation law and mechanism of dielectric properties of EPDM cable under the extrusion stress and thermal stress, we took EPDM for cable insulation of coal cutter as an object to study. The dielectric spectroscope of EPDM under the combined action of extrusion pressure and thermal stress was measured. The characteristic parameters of dielectric spectroscopy were obtained by simulating the dielectric spectroscopy according to the expression of complex permittivity from the single relaxation Cole-Cole model modified by DC conductivity. The change rule of the DC conductance and relaxation time constant was analyzed. The results show that temperature and extrusion pressure have obvious effects on the complex dielectric constant of EPDM. At a higher temperature, the increase of the real part of the complex permittivity at the lower frequency is obvious. Under the effect of DC conductivity and polarization, with the increase of extrusion pressure and temperature, the increase trend of real part of the complex permittivity at low frequencies slows down, while the real part decreases gradually at higher frequencies. Therefore, the change of DC conductance caused by extrusion stress and temperature is the key to the change of the complex dielectric constant of EPDM.

Key words

EPDM / thermal stress / complex dielectric constant / Cole-Cole model

Cite this Article

Ye WANG, Wei LI, Zhipeng LEI, Yang LIU, Zhijie SHI, Kunying HAN, Jiancheng SONG, Jianhua ZHANG. Dielectric Spectroscopy Analysis of Ethylene Propylene Diene Monomer for Cable Insulation Under Force and Thermal Stress[J]. Insulating Materials, 2021 , 54 (12) : 94 -100 . DOI: 10.16790/j.cnki.1009-9239.im.2021.12.015

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Year 2021 volume 54 Issue 12

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Article Info

doi: 10.16790/j.cnki.1009-9239.im.2021.12.015

Receive Date：2021-01-30
Online Date：2026-03-23
Published：2021-12-20

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History

Received：2021-01-30
Revised：2021-03-31

Funding

Affiliations

^aCollege of Electrical and Power Engineering, Taiyuan University of Technology, Taiyuan 030024, China

^bNational & Provincial Joint Engineering Laboratory of Mining Intelligent Electrical Apparatus Technology, Taiyuan University of Technology, Taiyuan 030024, China

^cShanxi Key Laboratory of Mining Electrical Equipment and Intelligent Control, Taiyuan University of Technology, Taiyuan 030024, China

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表12种不同金属材料的力学参数

科 Family	属数 Number of genus	种数 Number of species	占总种数比例 Percentage of total species (%)	属 Genus	种数 Number of species	占总种数比例 Percentage of total species (%)
鹅膏菌科Amanitaceae	2	11	5.26	鹅膏菌属 Amanita	10	4.78
小菇科 Mycenaceae	2	12	5.74	丝盖伞属 Inocybe	5	2.39
多孔菌科 Polyporaceae	8	14	6.70	蜡蘑属 Laccaria	5	2.39
红菇科 Russulaceae	3	23	11.00	小皮伞属 Marasmius	6	2.87
				小菇属 Mycena	11	5.26
				光柄菇属 Pluteus	5	2.39
				红菇属 Russula	17	8.13
				栓菌属 Trametes	5	2.39

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