• 제목/요약/키워드: KV

검색결과 574건 처리시간 0.025초

Characterization of Akabane virus (KV0505) from cattle in Korea

  • Yang, Dong-Kun;Kim, Yeon-Hee;Kim, Byoung-han;Kweon, Chang-Hee;Yoon, Soon-Seek;Song, Jae-Young;Lee, Sang-Hun
    • 대한수의학회지
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    • 제48권1호
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    • pp.61-66
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    • 2008
  • Akabane disease is caused by an arthropod-borne viral pathogen and leads to congenital abnormalities of the central nervous system in infected ruminants. One isolate, KV0505, showed cytopathic effect in Vero cells. The KV0505 isolate was obtained from plasma, which was collected from a cattle raised on Jeju Island in May 2005. Jeju Island is located near the southern part of the Korean peninsula. The isolate was confirmed as Akabane virus (AKAV) by immunofluorescence assay using AKAV specific monoclonal antibodies and reverse transcription polymerase chain reaction (RTPCR). Suckling mice inoculated with the isolate showed signs of paralysis and died within 10 days postinoculation. Comparisons of the KV0505 N gene sequence with 39 other known AKAV strains revealed nucleotide homologies ranging from 83.6% (MP496 strain) to 99.7% (M171 strain). When compared with the K-9 strain, which was isolated from a cow in Korea in 1994, the nucleotide sequence homology with the N gene was 99.7%. Thus, genes of the KV0505 isolate were closely related to those of the M171 strain, which were clustered into the Ic group of AKAV.

3상일괄조작형 170KV 50KA GCB의 개발 (Development or 170KV 50KA GCB with Common three-pole operating mechanism)

  • 송원표;김희진;성병조;이철현;노철웅;권영한
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1992년도 하계학술대회 논문집 B
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    • pp.626-628
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    • 1992
  • GCB(Gas Circuit Breaker) and GIS(Gas Insulated Switchgear) using $SF_6$ are worldwidely applied over 72.5KV classes. It Is known that $SF_6$ gas has the most superior characteristics among the extingushing and insulating media. Our Company has produced GCB and GIS from early 1980's and at present, we are producing 362KV 40KA class which is the highest voltage in our country. According to change KEPCO's standards (ESB standards), our company has redeveloped and tested for all productions type from 1989. During redeveloping, we largely contribute raise reliability of power system, through all the more improvement for performance and quality of manufactures. One of them, we developed 170KV 50KA GCB with common three-pole operating mechanism and sucessfully completed test of KERI under KEPCO presence, at first in our country. Thus, we announce the outline of it.

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유동과 전기장 내에서의 액체입자의 거동과 전기장이 입자의 산란에 미치는 영향에 관한 수치적 연구 (Numerical Evaluation of charged Liquid Particle′s Behavior in Fluid Flow and Electric Field and The Electric Effect on the Particle Dispersion)

  • 김형민
    • 대한기계학회논문집B
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    • 제26권4호
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    • pp.570-577
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    • 2002
  • Charged liquid particle's behavior in electric and flow field was simulated to define the effect of electric field on the contact area and its dispersion. For the simulation of flow and electric field finite volume method was applied. To find out the particle's moving path in that field lagrangian equation of motion was solved by Runge-Kutta methods. We assumed that the particle was charged 10% of Rayleigh limit while the particle passing through the electrode and the particle does not have an effect on the electric field. In case of 30[Kv] of voltage charging the particles injected from the central 60% of the nozzle injection area adhere to the grounded moving plate and no dispersion occurred. Increasing the charged voltage to 40[Kv], it brought about the same phenomena as that of 30[Kv] charging except the dispersion. Voltage increasing from 30[Kv] to 40 [Kv] caused higher Coulomb force acts on the particle and it made the particle dispersion.

154KV 주간선계통의 과도안정도해석 (Transient stability analysis of 154KV main transmission lines)

  • 송길영
    • 전기의세계
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    • 제18권3호
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    • pp.28-33
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    • 1969
  • 1968년 11월 3일 기하여 우리나라 154KV 주간선계통의 중성점접지방식이 종래의 PC접지방식으로부터 직접접지방식으로 전환되었다. 이 결과 계통의 운전면에 있어서는 이상전압상승의 경감, 고속도차단방식의 채용등으로 공급신뢰도가 한층 더 크게 될것으로 기대되고 있다. 주지하는 바와같이 계통의 안정도는 정상(Steady-state) 및 과도(Transient-state) 안정도의 양자로 대별되지만 이중 현단계의 계통운용면에서 특히 중요한 지위를 차지하는 것은 후자의 과도안정도 일것이다. 본문에서는 최근에 한국전자계산소의 전자계산기(FACOM-222)를 사용하여 직접접지방식전환후의 과도안정도를 계산한 해석결과및 앞으로 채용하여야 할 몇가지 안정도증진대책을 간단히 설명하고저 한다.

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154KV개봉. 오류 지중송전선로 준공보고

  • 김성곤;정수근
    • 전기의세계
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    • 제29권11호
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    • pp.693-698
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    • 1980
  • We T.E.C. have commenced to develop the O.F. cable in April, 1977. Now we have finished the Type-Test and produced in full-operation of 154KV 1x600mm$^{2}$ and 154KV 1x1200mm$^{2}$ O.F. cables. Especially we have completed pulling and splicing of the 24.82kms O.F. cable in KaeBong-OuRyu Route, and now it is operating well. This has important meaning that Extra High Voltage Under Ground Transmission Line has constructed by domastic engineers for the first time in Korea. Thank to arrange and publish it, and hope it can be helpful to the related.

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6 MeV 산업용 가속기 전원 공급 장치의 구동특성에 관한 연구 (A Study on the Drive Characteristic of the Power Supply System of 6 MeV Industrial Accelerator)

  • 임중열
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 1999년도 전력전자학술대회 논문집
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    • pp.415-418
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    • 1999
  • It is expected that industrial accelerator having been distributed fast in domestic these days will be widely used for various fields. In this study we deal with the basic consideration for the drive characteristic of power supply system in the system of industrial accelerator installed at Dongshin University. Beam energy of this system is 34keV~40KeV, 100A. The modulator emits a 11KV-380A pulse of $4.5\mu\textrm{s}$ duration that is transformed to about 34KV-40KV pulse by a pulse transformer.

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4-채널 스파크 갭 스위치의 동작특성에 관한 연구 (A Study On The Operating Chracteristics Of 4-Channel Spark Gap Switch)

  • 최승길;조주현;장용무;정운관;강형부
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1989년도 하계종합학술대회 논문집
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    • pp.436-438
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    • 1989
  • Low inductance 4-channel spark gap switch was designed and performed. At NTP, self-breakdown voltage is 29kv, 43kv and 33kv when ratio of seperation($d_1$: $d_2$) is 1:1, 1:2 and 1:3 respectively.

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345kV CV케이블의 절연두께 산정 (Estimate of Insulation thickness for EHV XLPE power cable)

  • 최봉남;윤덕환
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2001년도 하계학술대회 논문집 C
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    • pp.1801-1803
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    • 2001
  • At present the under ground power transmission systems have installed until 154KV XLPE power cable in Korea But, the large capacity underground power transmission systems have been required gradually with the increasing demand of electric power. Therefore, our company has developed 345KV XLPE cable. This paper describes the estimate details of the insulation thickness according to weibull plotting for 345KV XLPE power cable.

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