Study on the Pulsed Flashover Characteristics of Solid-Solid Interface in Electrical Devices Poured by Epoxy Resin

LI Manping(李曼苹); WU Kai(吴锴); YANG Zhanping(杨战平); DING Man(丁曼); LIU Xin(刘鑫); CHENG Yonghong(成永红)

doi:10.1088/1009-0630/16/9/09

Plasma Science and Technology > 2014 > 16(9): 856-860. > DOI: 10.1088/1009-0630/16/9/09

LI Manping(李曼苹), WU Kai(吴锴), YANG Zhanping(杨战平), DING Man(丁曼), LIU Xin(刘鑫), CHENG Yonghong(成永红). Study on the Pulsed Flashover Characteristics of Solid-Solid Interface in Electrical Devices Poured by Epoxy Resin[J]. Plasma Science and Technology, 2014, 16(9): 856-860. DOI: 10.1088/1009-0630/16/9/09

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Study on the Pulsed Flashover Characteristics of Solid-Solid Interface in Electrical Devices Poured by Epoxy Resin

1 State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an 710049, China 2 Institute of Electronic Engineering, China Academy of Engineering Physics, Mianyang 621900, China

Funds: supported by Coordination Foundation of Institute of Electronic Engineering, China Academy of Engineering Physics (No. WF2011- 013)

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Received Date: July 08, 2013

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Abstract

Abstract

In electrical devices poured by epoxy resin, there are a lot of interfaces between epoxy resin and other solid dielectrics, i.e. solid-solid interfaces. Experiments were carried out to study the flashover characteristics of two typical solid-solid interfaces (epoxy-ceramic and epoxy- PMMA) under steep high-voltage impulse for different electrode systems (coaxial electrodes and finger electrodes) and different types of epoxy resin (neat epoxy resin, polyether modified epoxy resin and polyurethane modified epoxy resin). Results showed that, the flashover of solid-solid interface is similar to the breakdown of solid dielectric, and there are unrecoverable carbonated tracks after flashover. Under the same distance of electrodes, the electric stress of coaxial electrodes is lower than that of finger electrodes; and after the flashover, there are more severe breakdown and larger enhanced surface conductivity at interface for coaxial electrodes, as compared with the case of finger electrode. The dielectric properties are also discussed.
- epoxy resin,
- solid-solid interface,
- flashover characteristic,
- breakdown

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References (11)

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