• Title/Summary/Keyword: electrical properties

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Study on Electrical Properties of Ceramic Coated Al Bus Bar (세라믹 코팅 Al 부스바의 전기적 특성 연구)

  • Baek, Seung-Myeong;Kwak, Min-Hwan;Kwag, Dong-Soon
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.66 no.11
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    • pp.1647-1650
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    • 2017
  • Bus bars are used in place of cables because they can carry more electrical energy with the same volume of conductors. This paper deals with the electrical properties of ceramic coating material for busbars. A ceramic coated samples were prepared for the electrical properties test. There are two types of samples. One is a sample without degradation, and the other is a sample degraded for 30 days. Four electrical properties tests were carried out in accordance with domestic standards. Four electrical characteristics tests are AC dielectric breakdown, V-t, lighting impulse dielectric breakdown, and discharge arc. Both samples showed excellent electrical properties, and the ceramic coating material is very good insulating materials for bus bar.

Electrical Properties of ZnO:Al Transparent Conducting Thin Films for Film-Typed Dye Sensitized Solar Cell

  • Kwak, Dong-Joo
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.22 no.11
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    • pp.36-43
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    • 2008
  • In this parer aluminium-doped zinc oxide(ZnO:Al) conducting layer was deposited on polyethylene terephthalate(PET) substrate by r. f. magnetron sputtering method. The effects of gas pressure and r. f. sputtering power on the structural and electrical properties of ZnO:Al thin film were investigated experimentally. Especially the effect of position of PET substrate on the electrical properties of the film was studied and fixed to improve the electrical properties and also to increase the deposition rate. The results show that the structural and electrical properties of ZnO:Al thin film were strongly influenced by the gas pressure and sputtering power. The minimum resistivity of $1.1{\times}10^{-3}[{\Omega}-cm]$ was obtained at 5[mTorr] of gas pressure, and 18D[W] of sputtering power. The deposition rate of ZnO:Al film at 5[mTorr] of gas pressure was 248[nm/min]. and is higher by around 3 times compared to that at 25[mTorr].

A Study on the Electrical Properties of Electrical Tree Degradation in XLPE Cable Insulation (XLPE 케이블의 전기트리 열화에 따른 전기적 특성 검토)

  • Gang, Dong-Sik;Seon, Jong-Ho;Lee, Hong-Sik;Park, Jeong-Hu;Jo, Jeong-Su
    • The Transactions of the Korean Institute of Electrical Engineers C
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    • v.49 no.7
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    • pp.400-405
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    • 2000
  • In order to improve the reliability of XLPE cables, it is necessary to understand the mechanism of electrical and water tree degradation. Especially, electrical tree initiation and propagation are important in XLPE cable insulation. This paper deals with the changes of electrical properties of XLPE cable insulation with electrical tree degradation. To understand the electrical properties of XLPE insulation, specimens were prepared by 22.9kV distribution cable and made in a type of block. Ogura needles having tip radius of 10${\mu}{\textrm}{m}$ were inserted into each block pieces. AC voltages of 8kV, 10kV and 12kV at 60Hz were applied to needle. We investigated the relationship between electrical properties(PD quantity, tan$\delta$ and DC current) and the growth of electrical tree. The electrical properties of the specimens were measured from initiation of tree to breakdown and their characteristics were analyzed.

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Electrical Properties of XLPE/VLDPE B1ends (XLPE/VLDPE 블렌드의 전기적 성질)

  • 고정우;서광석;김종은;강형식;김덕주
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 1998.06a
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    • pp.215-218
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    • 1998
  • XLPE/VLDPE (Crosslinked polyethylene/very low density polyethylene) blends were prepared by a twin screw extruder and their electrical properties such as water tree and breakdown characteristic were measured. it was found that both water tree and breakdown characteristics of XLPE were improved by the addition of VLDPE to polyethylene. It was also found that the extent of improvement of electrical properties by the addition of VLDPE to polyethylene depends on the type and concentration of VLDPE.

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Crystallization and Electrical Properties of Doped and Undoped Indium Oxide Films

  • Kamei, Masayuki;Akao, Hirotaka;Song, Pung Keun;Yasui, Itaru;Shigesato, Yuzo
    • The Korean Journal of Ceramics
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    • v.6 no.2
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    • pp.107-109
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    • 2000
  • The crystallization process and the electrical properties of amorphous tin-doped indium oxide (ITO) films have been studied in contrast with those of undoped indium oxide (IO) films. Amorphous ITO and IO films were prepared by magnetron sputtering succeeded by annealing in the air at various temperatures. ITO films showed higher crystallization temperature compared with that of IO films, suggesting an excess free energy caused by the repulsion between the active donors ($Sn^{4+}$). The analysis of the electrical properties alternated with the phased annealing of films provided essential information for understanding the conduction mechanisms of ITO. It was also revealed that the amorphous IO/ITO films showed oxidation around $100^{\circ}C$ in contrast with crystalline IO/ITO films with the oxidation temperature above $200^{\circ}C$.

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Electrical properties of insulating oils for automobile ignition coil (자동차 점화코일용 절연유의 전기적 특성)

  • 신종열;홍진웅
    • Transactions of the Korean Society of Automotive Engineers
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    • v.7 no.5
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    • pp.172-177
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    • 1999
  • In this paper, the physical and electrical properties of the synthetic fluids No. 2 class Ⅶ used the insulating oils for automobile ignition coil are studied. Also, benzotriazole(BTA) 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 investigated. To investigate the electrical characteristics, the breakdown strength of each specimen by an experiment for AC breakdown and the changes of conductivity by measuring volume resistivity are analyzed. It is considered that the effective content of BTA as charge suppressant additive is about 10[ppm] from the results of AC breakdown and volume resistivity test.

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High Molecular Weight Conjugated Polymer Thin Films with Enhanced Molecular Ordering, Obtained via a Dipping Method

  • Park, Yeong Don
    • Bulletin of the Korean Chemical Society
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    • v.34 no.11
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    • pp.3340-3344
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    • 2013
  • The fabrication of polymer field-effect transistors with good electrical properties requires the minimization of molecular defects caused by low molecular weight (MW) fractions of a conjugated polymer. Here we report that the electrical properties of a narrow bandgap conjugated polymer could be dramatically improved as a result of dipping a thin film into a poor solvent. The dipping time in hexanes was controlled to efficiently eliminate the low molecular weight fractions and concomitantly improve the molecular ordering of the conjugated polymer. The correlation between the structural order and the electrical properties was used to optimize the dipping time and investigate the effects of the low MW fraction on the electrical properties of the resulting thin film.

Mechanical and Electrical Properties Behavior Study of Overhead Conductor due to Forest Fire (산불에 노출된 가공송전선의 기계적 및 전기적 특성 거동 연구)

  • Jang, Young-Ho;Kim, Byung-Geol;Kim, Shang-Shu;Han, Se-Won;Kim, Jin-Han
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2008.06a
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    • pp.108-109
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    • 2008
  • Forest Fire can cause a serious damage to overhead conductors. Therefore, the detailed investigation for the changes of mechanical and electrical properties of damaged conductors should be carried out to understand the effect of forest fires on conductors. This is very much important to maintain transmission line safely. Especially, this paper describes the changes of mechanical and electrical properties of flame exposed conductor. The detailed will be given in the text.

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The Electrical Properties of OLED by surface Etching methode of ITO (ITO 표면 처리방법에 따른 OLED의 전기적 특성)

  • Yang, Myoung-Hak;Ki, Hyun-Chul;Min, Yong-Ki;Hong, Kyung-Jin
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2008.06a
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    • pp.455-456
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    • 2008
  • In this study, we report that an electrical properties of OLEDs was investigated by the surface etching method of ITO Layer. The electrical properties of OLEDs was measured by IVL and optical properties by EL spectrum. The fundamental structure of OLEDs was ITO anode/TPD(400$\breve{A}$)/$Alq_3(600\breve{A})$/LiF(5$\breve{A}$)/Al(1200$\breve{A}$) cathode. The threshold voltage was low value according to the low resistance of surface. The luminance was increased by decreased surface resistance.

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Mechanical and Electrical Properties of Overhead Conductor due to Forest Fire (산불에 노출된 가공송전선의 기계적 및 전기적 특성 거동)

  • Kim, Byung-Geol;Jang, Young-Ho;Kim, Shang-Shu;Han, Se-Won
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.21 no.11
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    • pp.1042-1048
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    • 2008
  • Forest Fire can cause a serious damage to overhead conductors. Therefore, the detailed investigation for the changes of mechanical and electrical properties of damaged conductors should be carried out to understand the effect of forest fires on conductors. This is very much important to maintain transmission line safely. Especially, this paper describes the changes of mechanical and electrical properties of flame exposed conductor. Overhead conductors temperature were almostly 55$\sim$65% of ambient temperature. Tensile Strength decreased according to incerase of Forest Fire temperature. The detailed will be given in the text.