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Study on Electrical Tracking of Epoxy Resin Insulating Material Using Inclined-Plane Tracking Method

Abdul Syakur1, Rochmadi2, Tumiran3, Hamzah Berahim3

1 Doctoral Student in Electrical Engineering, 2 Department of Chemical Engineering, 3 Department of Electrical Engineering – Gadjah Mada University

Jl. Grafika 2, Yogyakarta, Indonesia.

Abstract Electrical tracking on the surface of insulating materials due to flashover is continuously formed when there are contaminants flows in the surface of insulating material. Surface tracking causes damage of electrical insulating materials and flow of electric current will be easier. A good insulating material must have very small electrical characteristics of leakage current, critical flashover voltage must be very large and the surface material must be hydrophobic.

This paper presents research results of leakage current and surface tracking, which were performed on epoxy resin insulating materials using Inclined-Plane Tracking (IPT) method based on IEC standards 587:1984. The specimens of epoxy resin insulating materials are based on Di-Glycidyl Ether of Bisphenol A (DGEBA) and Methaphenylene-Diamine (MPDA) as curing agent. High voltage AC 50 Hz was applied to the incline-plane electrodes. Contaminant solution of ammonium chloride (NH4Cl) was flown on surface insulation of epoxy resin. At the time of discharge on the surface of the material, the leakage current was detected and recorded using oscilloscope

Based on the results of measurement data, we concluded that the discharge current was influenced by the hydrophobic of the material surface. Hydrophobic properties also significantly influenced on the formation of surface tracking. The discharge time took place was also influenced by material surface conditions.

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