ANALISIS DEGRADASI PERMUKAAN BAHAN ISOLASI RESIN EPOKSl DENGAN PENGISI PASIR PANTAI YANG BANYAK MENGANDUNG KALSIUM
Insulation materials that commonly used in air insulation, which, is operated at high voltage, are the porcelain, glass, and polymer materials. One of the insulating polymer materials that are used is epoxy resin because it has several advantages compared to porcelain and glass. However, this insula...
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| Main Authors: | , |
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| Format: | Theses and Dissertations NonPeerReviewed |
| Published: |
[Yogyakarta] : Universitas Gadjah Mada
2012
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| Online Access: | https://repository.ugm.ac.id/100694/ http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=57116 |
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| Institution: | Universitas Gadjah Mada |
| Summary: | Insulation materials that commonly used in air insulation, which, is operated at
high voltage, are the porcelain, glass, and polymer materials. One of the insulating
polymer materials that are used is epoxy resin because it has several advantages
compared to porcelain and glass. However, this insulation material has a shortage of
aging/degradation of the surface (surface-aging) due to environmental pollution.
Environmental pollution can cause insulation coated with dirt and chemicals in the
long time. In wet condition, the particle contaminants on the surface of the insulator
will dissolve in water and form a continuous conductive path between the high voltage
electrode and ground electrode. When the applied voltage reaches the flashover
voltage critical air, small sparks will be produced. Heat generated by these sparks,
causes carbonization and vaporization of isolation material and leads to produce
"carbonized points" on the surface permanently. This process is cumulative and
sustainable resulting in insulation failure. The carbonized path is formed between the
electrodes. This phenomenon, which is called "surface tracking".
Material that was used in this research was epoxy resin polymer isolation using
of comparison values (base material diglycidyl ether of bisphenol-A (DGEBA) :
hardener material or curing agent metaphenylene diamine (MPDA)) were 1:1, with the
increase of silane and coastal sand as filler by the value of 10%, 20%, 30%, 40%, and
50%, sample size was 120 x 50 mm. Research was done in laboratory according to
standard IEC 587: 1984. High voltage electrodes were connected to high voltage AC
generator 3.5 KV, and NH4CI contaminants flowing on insulator surface of 0.3 ml /
min from high voltage electrode. The ground electrode was connected to oscilloscope
for measuring the leakage current. In this study, the effect of variation in stoichiometry
to the hydrophobic contact angle value, leakage current waveforms, and surface
degradation caused by erosion and tracking processes and tracking time were
analyzed.
From the results of the research, it was obtained that the epoxy resin that was
used in this research are categorized as hydrofobik and partially wetted. The increase
concentration of silane dan coastal sand as filler caused the increase in contact angle
which meant the increase in surface insulation resistance, so that leakage currents flew
on the surface insulating material not easily. The increase in concentration of silane
dan coastal sand as filler retarded the carbon growth the surface of insulating material.
This indicated that the increase in filler concentration slow down the aging or the
degradation decreasing on the surface of insulating material. Concentration value of
filler that had the optimal performance of the tracking process and erosion was 40%. |
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