• 대한전기학회:학술대회논문집
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• 대한전기학회 1990년도 추계학술대회 논문집 학회본부
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• pp.176-179
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• 1990

In this paper, the pheonmena of flowing electrification is experimently studied in the model transformer of a super high voltage transformer. The current of natural terminal which is flowed by the flowing electrification is increased according to oil flow, but according to the oil temperature the current is decreased and the direction of the current is changed.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1992년도 하계학술대회 논문집 B
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• pp.931-933
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• 1992

The static charges generated at the interface between the insulating oil and the solid materials, can be affected by impurities such as moisture. This paper investigated the charging tendency of clean oil and the oil with moisture in stainless steel pipe. The experimental results show that static electrification of the oil with moisture is smaller than that of the clean oil, and the oil is positively charged.

• 한국조명전기설비학회지:조명전기설비
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• 제5권3호
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• pp.72-77
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• 1991

In a large power transformer, insulating oil is forced to circulate for cooling the heat generated by the losses within windings and core. When insulating oil flows and rubs against various materials, such as insulating paper or core, the electrostatic charges are separated at the interface of the oil and the solid material. This paper considers the streaming electrification of various materials used in the transformer. In this study, we show that a solid material such as paper is negatively charged. On the other hand, a solid material such as core is positively charged.

• 한국안전학회지
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• 제8권4호
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• pp.101-106
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• 1993

The streaming current of insulating oil increases with increasing oil velocity and oil amount, A contact potential difference as an energetic state exits in the polymer thin film, both sides of which are contacted by two different metals having different work functions. Accordingly, the potential difference may be a cause for the short circuited transient current flowing through the external circuit. The polymers are electrificated as the electric field Is supplied, and the currents flow with increasing temperature.

• E2M - 전기 전자와 첨단 소재
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• 제5권1호
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• pp.81-88
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• 1992

본 연구는 고체-액체 계면에서 액체가 유동할때 발생되는 대전에 미치는 계면 활성제의 영향에 대하여 분석한 것이다. 유동전류는 유속의 증가에 따라 선형적으로 증가하고 유온의 증가에 따라 약 46[.deg.C] 이하에서는 증가하고 그 이상에서는 감소한다. 계면활성제의 종도가 증가함에 따라 유동전류는 감소하고 계면활성제의 한 분자내 산소 원자의 수가 많을수록 유동전류의 감소효과가 크게 됨을 제시할 수 있다. 계면활성제가 첨가된 절연유의 전도전류는 온도에 따라 무첨가보다 다소 큰 경향이 있으나 첨가량에는 현저한 차이가 없다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2000년도 학술대회 논문집 전문대학교육위원
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• pp.48-51
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• 2000

The purpose of this study is to find the way to reduce the electrostatics by interface activation substances added in the insulating oil with concentration[ppm]. As results, The streaming current, surface tension and viscosity of the samples added nonionic and hermaphrodic substances are decreased but the conductivity is increased at higher point than the 1[ppm](c.m.c.), the other side the same phenomena of the samples added cationic and anionic substances are discovered at the 10[ppm].

• 대한전기학회:학술대회논문집
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• 대한전기학회 1998년도 하계학술대회 논문집 D
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• pp.1410-1412
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• 1998

The purpose of this study is to find the way to prevent the electrostatics from the interface of liquid and solid by adding interface active substances to the insulating oil with concentration. As results, The streaming current, surface tension, and viscosity decreased and conductivity increased at the higher point than the c.m.c. which resulted from, the adding of the interface active substances.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1996년도 하계학술대회 논문집 C
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• pp.1633-1635
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• 1996

This phenomena of streaming-electrification is generated between solid and liquid boundary called electric double-layer which is generated by potential difference. A charge separation at interfaces between a moving fluid and a solid boundary can give rise to the generation of substantial electric field and at last these can give rise ta insulating failure. Therefore injection of the adverse-charge in streaming-electrified insulating oil to eliminate the accumulation charge and its related phenomena was investigated.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 1988년도 춘계학술대회 논문집
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• pp.70-73
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• 1988

Influence of Velocity and Temperature on Streaming Electrification of Insulating Oil is investigated by injection method. Leakage current is increased slightly with increasing temperature in the temperature range 20 to $80^{\circ}C$ at low flow rate, however, it show a peak in the temperature 40 to $60^{\circ}C$ at high flow rate. Leakage current is also increased linearly with increasing flow rate in the flow rate range 1 - 31/min but thereafter, it is increased abruptly with increasing flow rate.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1999년도 하계학술대회 논문집 E
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• pp.2146-2148
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• 1999

The purpose of this study is to find the way to reduce the electrostatics by interface activation substances added in the insulating oil with concentration[ppm]. As results. The streaming current, surface tension and viscosity of the samples added nonionic and hermaphrodic substances are decreased but the conductivity is increased at higher point than the 1[ppm] (c.m.c.), the other side the same phenomena of the samples added cationic and anionic substances are discovered at the 10[ppm].