Leakage current test and study of room temperature vulcanizing coatings for outdoor high voltage porcelain insulators

2002 ◽  
Author(s):  
Nien-Chung Wang ◽  
Chin-Fu Chi ◽  
Tzong-Yih Guo
Keyword(s):  
Leakage Current ◽  
High Voltage ◽  
Room Temperature ◽  
Current Test ◽  
Porcelain Insulators ◽  
High Voltage Porcelain

scholarly journals Evaluation of Tanzania local ceramic raw materials for high voltage porcelain insulators production

Cerâmica ◽  
2018 ◽  
Vol 64 (372) ◽  
pp. 570-576
Author(s):  
B. Ngayakamo ◽  
S. E. Park
Keyword(s):  
High Voltage ◽  
Bending Strength ◽  
Raw Materials ◽  
Microstructural Characterization ◽  
Dielectric Strength ◽  
Pressing Method ◽  
X Ray ◽  
Mineral Phases ◽  
Porcelain Insulators ◽  
High Voltage Porcelain

Abstract This study evaluated the potential of locally sourced-ceramic raw materials in Tanzania, Pugu kaolin, Same clay, vermiculite and feldspar, for production of high voltage porcelain insulators. The chemical, mineral phases and microstructural characterization of raw materials and porcelain samples were carried out using the X-ray fluorescence, X-ray diffraction, and scanning electron microscopy techniques, respectively. The mineral phases of the fired porcelain sample identified were mullite and quartz. The porcelain bodies were fabricated using the dry pressing method by varying the composition of the selected ceramic raw materials. The physical-mechanical properties and dielectric strength were measured for each porcelain sample. The sample with the composition of 20% Pugu kaolin, 20% Same clay, 20% vermiculite and 40% feldspar was found to have the dielectric strength of 50.8 kV.mm-1, bending strength of 20 MPa and water absorption of 0.46%, which satisfies the main requisite properties for high voltage porcelain insulators.

A study of biological contaminants on high voltage porcelain insulators, I

1997 ◽  
Vol 42 (1) ◽  
pp. 35-39 ◽  
Author(s):  
Robert D. McAfee ◽  
Robert D. Heaton ◽  
Joe M. King ◽  
Alexander U. Falster
Keyword(s):  
High Voltage ◽  
Biological Contaminants ◽  
Porcelain Insulators ◽  
High Voltage Porcelain

scholarly journals Feasibility Study on Electrical Properties of 20 kV Polymeric Insulator Dry Test and Rainwater Test

2021 ◽  
Vol 17 (4) ◽  
Author(s):  
Abdul Syakur ◽  
A.I.W. Nugroho ◽  
Hermawan Hermawan
Keyword(s):  
Epoxy Resin ◽  
Leakage Current ◽  
High Voltage ◽  
Electric Power System ◽  
Insulation Resistance ◽  
Current Test ◽  
Polymer Insulator ◽  
Dry Conditions ◽  
Polymer Insulators ◽  
Ceramic Insulators

Insulator is a very important equipment in an electric power system. Ceramic insulators have been widely used to support conductors in 20 kV power lines. The problem of ceramic insulators is that they are heavy, easily contaminated on the surface and require a lot of energy in the manufacturing process. Therefore, polymer insulators were developed. This paper presents the design of an epoxy resin polymer insulator with Titanium Dioxide (TiO2) as a nanofiller. The leakage current test was carried out in a high voltage laboratory by applying an AC high voltage of 50 Hz to the insulator dry conditions and the insulator wetted by rainwater contaminants. The results of the leakage current test in dry conditions are 487.6 μA, rainwater contaminated conditions are 594.93 μA, insulation resistance in dry conditions is 2.07 G-Ohms, and contaminated conditions are 1.41 G-Ohms. Based on the test results show that the insulator leakage current increases up to 22% when the surface of the insulator is contaminated with rainwater. Meanwhile, the insulation resistance decreased by up to 32% in conditions contaminated with rainwater. The value of leakage current and insulation resistance indicates that the epoxy resin insulator with TiO2 as filler is electrically feasible to use.

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