• Proceedings of the KIEE Conference
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• 1993.07b
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• pp.624-626
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• 1993

The Electrical Charge generated by friction in flowing insulating oil can create hazadous accidents. Neutralization of static charges in the oil during transportation is an obvious method of overcoming the problem of internal electric charge. It is known that SCR(Static Charge Reducer) can neutralize much of this charge by the needle electrode and mixing it with the original charge. In our experiment, a filter to generate static charge was set just befor a measurement pipe, and streaming current from the filter to the earth $I_s$, current from the electrode to the earth $I_e$ and current from the receiving tank to the earth $I_f$ were measured in a steady state. As a result, charge density and needle electrode current increases with increasing of oil temperature. Charge elimination rate decreases with increasing of oil flow rate, and increases with increases of oil temperature. Faraday Cage current decreases with increasing of oil temperature.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 1997.04a
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• pp.253-256
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• 1997

Recently, mixture insulating oils is widely used in respect that the physical and the electrical properties is more excellentthan mineral oils, such as alkylbenzene oils and silicone oils, and that cost is lower than alkylbenzene oils or silicone oils. Also, it is important to research for the additive BTA(Benzotriazole) as a study for the phenomena of streaming electrification of mineral oils. So, mixture insulating oils class 7-2, is selected as a specimen in this experiments, and the contents of BTA in specimen are 0.2[ppm], 10[ppm] and 30[ppm], respectively. Then, the physical and the electrical properties for each specimen is made researches.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.61 no.6
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• pp.821-826
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• 2012

The streaming electrification process of vegetable insulating oils occurring when the oils contacted with solid material in a high power transformer circulation system seems to cause electrical discharge incidents and may cause failures. We therefore measured the dielectric breakdown voltage tendency of vegetable insulating oils flowing on the surface of the charging device with various velocity and temperature. First, the relation between the velocity and breakdown voltage tendency of vegetable oils, can be explained by volume effect and v-t effect. Second, experimental results show that applied voltage have little effect on dielectric breakdown voltage, when vegetable insulating oils used for large power transformer.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 1997.11a
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• pp.294-297
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• 1997

A study has been carried out electrical conduction properties of synthetic fluids No. 2 of KS class VII used for insulating and cooling the power device. BTA(Benzotrizole) as the streaming electrification suppressant additive is added to the oil, and the change of physical and electrical properties due to different BTA concentration is investgated. From the result of FTIR spectrum, it is confirmed that the absorpption peak in wavenumber 3400-3450[cm$\sub$-1/] is smaller and disappered by adding BTA to the oil. It is considered that the effective content of BTA is about 10[ppm] from the result of electrical conduction experiment.

• Electrical & Electronic Materials
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• v.3 no.4
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• pp.332-338
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• 1990

본 연구는 절연유가 금속 파이프 중을 통과할 때 흐르는 유동전류 특성에 대하여 실험적으로 규명하였다. 유동전류는 파이프 길이, 절연유의 속도 및 온도에 따라 변하는 것이 관측되는데 파이프 길이가 4-6cm부근에서 피이크치가 나타나고 유속의 증가에 따라서는 선형적으로 증가하며 그리고 유의 온도가 약 50.deg.C 부근에서 또한 피이크가 나타나고 있다. 절연유에 전하를 주입시키는 수단으로 코로나 방전을 이용하였으며 부코로나 대전된 절연유의 유동전류가 코로나 대전 시키지 않은 절연유나 정코로나 대전된 절연유의 것보다 큰 값이 관측되었다. 이 결과로부터 고체 액체 접촉시 액체중의 음이온이 화학 포텐셜에 의하여 고체 표면에 흡착된다는 사실과 유동전류의 방향 및 발생기구를 해석할 수 있다.