Breakdown Voltage Of Polymer Material Under Different Shape Of High Voltage Electrode

Amril Rezza, Sapri (2015) Breakdown Voltage Of Polymer Material Under Different Shape Of High Voltage Electrode. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

High voltage insulation technology has undergone continuous development and improvement over time, from the shelves of ceramics to polymer composite insulating synthetic material. Some research has been done, but still has room to improve the performance of insulating polymer. A synthetic polymer is widely used in high-voltage insulation and was divided into two parts which is thennoplastic and thennoset materials. This study focuses the perfonnance thennoplastic materials as high-voltage insulation materials. In this study the thermoplastic polymeric material has been selected is High Density Polyethylene (HOPE). Among the basic needs to examine and evaluate the performance of selected materials as external high voltage applications is its dielectric strength level. In determining the dielectric strength of the selected material, breakdown test on the specimen was conducted using three different shapes of electrode which are spherical, flat end and pin shaped electrode. The test parameters, dimensioning and condition of the specimen prepared based flat sheet material testing accordingly to international standard BS EN 60243-1: 1998. The experiment was carried out by complying test methods for determining the strength of the long-term solid electrical insulating materials at power frequencies of 50 Hz. From this study, HOPE meets the requirements of the breakdown field strength of this polymer under all four different shapes of electrodes which is it does comply with the request, which must exceed the minimum requirement of 10 KV /mm with reference to the international standard BS EN 62039: 2007. Pin electrode does give the most influence on HOPE dielectric performance which gives the highest breakdown value of the polymer. Then, this breakdown results can be used to determine the characteristic of processing variables, aging condition, and other manufacturing or environmental situation in high voltage polymeric insulation application.

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