• Title/Summary/Keyword: Protection of equipment

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To examine the construction plan of the lightening rod equipment for the J-booster pumping station in and around KEPCO'a high voltage distribution power line (한전 배전선로 주변에 위치한 J가압장의 피뢰설비 구축방안 검토)

  • Hong, Sung-Taek;Lee, Eun-Chun;Shin, Gang-Wook
    • Proceedings of the KIEE Conference
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    • 2003.07a
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    • pp.293-295
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    • 2003
  • KEPCO's high voltage distribution power line laid under the ground near to the J-booster pumping station that supply water for living. Lightening rod equipment does not installed at the J-booster pumping station because KEPCO's over head ground wire for protection functions as a lightening rod equipment. In this study, it is concerned whether KEPCO's over head ground wire for protect the distribution power line affect to the J-booster pumping station which is installed for reduce the damage from the direct and indirect lightening. If KEPCO's protection area does not affect to the J-pumping station, it is plan to examine the construction method of lightening rod protection angle and lightening rod equipment and to suggest the optimum protection plan using the surrounding structure based on the suitability of protection area.

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Protection Design and Lightning Zone Analysis for Unmanned Aerial Vehicle with Composite Wings (복합재 주익 무인항공기의 낙뢰보호 설계와 피격영역 해석)

  • Hee-chae Woo;Yong-Tae Kim
    • Journal of the Korea Institute of Military Science and Technology
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    • v.26 no.3
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    • pp.302-312
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    • 2023
  • This paper describes the analysis of lightning strike zoning, the indirect lightning data simulation and the protection design for lightning indirect effects of equipment by lightning strike for unmanned aircraft consisting of composite wings. Through the analysis of lightning strike zoning according to the external shape of unmanned aerial vehicles, the structure areas that should be protected during lightning strike is derived, and the protection requirements of lightning indirect effects for flight critical equipments and equipment that must be operated upon lightning strike was derived. Lightning protection levels according to the location of mounting equipment and surrounding structure materials for each equipment was derived, and the protection design of the unmanned aerial vehicle with composite structures was also proposed from direct effect of lightning. Later, the lightning protection technology will be verified by the ground test of lightning direct and indirect effects.

Improvement of fire protection equipment the opening of according to narrow the distance between buildings (건물 간 이격거리 협소에 따른 개구부 방화설비의 개선방안)

  • Oh, Taek-Hum;Park, Chan-Seok
    • Journal of the Korea Safety Management & Science
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    • v.15 no.1
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    • pp.61-68
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    • 2013
  • In the case of the fire to the exterior of the building through openings, the openings of the adjacent building are exposed to the risk of combustion expanding and factors that affect the combustion in the radiant heat and direct flame. Recent five years, fire of the adjacent building indicated that incidence of the 5,134(2.27%) among total 225,934 cases occurred The damage scale of fire expanded was lower than in a single building but casualties(5.46%) and property(25.0%) damage were higher. Therefore, this study provides to analyze the operating status for fire protection equipment of fire-preventing area in the Seoul and to apply measures to improve fire protection equipment according to narrow the distance between the building openings studied.

Design and Implementation of a Protection System for the Mentally Handicapped Using a GPS Receiver and Mobile Communications (이동통신과 GPS 수신기를 이용한 지적장애인 보호 시스템의 설계 및 구현)

  • Seol, Tae-Min;Yoon, Sang-Ho;Kang, Chang-Soon
    • Journal of Information Technology Services
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    • v.9 no.4
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    • pp.207-217
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    • 2010
  • This paper is concerned with a protection system for the mentally handicapped, which is utilizing a GPS receiver and mobile communications. The protection system consists of a location notification equipment, a location identification and management server, and a cell phone of guardian. The location notification equipment is made up of a GPS receiver, a CDMA communication module and a microprocessor. The equipment transfers the location of the mentally impaired to the location identification and management server when the handicapped gets out of a certain bound of the designated facility. The server marks the handicapped's location on the map in the server and also notifies the guardian's cell phone of the locations. With applying the proposed protection system to social welfare organizations related to the mentally handicapped, it is expected to efficiently contribute to the promotion of the handicapped's welfare.

A Study on the Reformation of Certified Fire Fighting Specialists - Focused on Fire Protection System Managers - (소방전문자격사제도의 개선에 관한 연구 - 소방시설관리사를 중심으로 -)

  • Oh, Hyeong-Geun
    • Journal of the Korean Society of Hazard Mitigation
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    • v.6 no.4 s.23
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    • pp.21-28
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    • 2006
  • This research analyzed the operational status of fire protection system managers who execute self inspection of the fire equipment in the specific fire protection facilities and presented the improvement scheme. Being made up inquiry for job environment, institutional environment, and operational environment for the subject of fire protection system managers who execute self inspection to complement the fire equipment inspection by city public fire protection service, the issues of the operational status of the institution of fire protection system managers were positively understood. The research result showed the conflict among building owner, fire equipment inspector, and fire protection system manager was existed due to the legal and institutional inertia to the self inspection, so it is judged that mutual complementary and cooperative relation should be established.

Implementation of the Radiation Protection Module for Electronic Equipment from Pulsed Radiation and Its Function Tests (펄스방사선에 대한 전자장비 방호용 모듈구현 및 기능시험)

  • Lee, Nam-Ho
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.62 no.10
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    • pp.1421-1424
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    • 2013
  • The electronic equipment which is exposed to high level pulsed radiation is damaged by Upset, Latchup, and Burnout. Those damages come from the instantaneous photocurrent from electron-hole pairs generated in itself. Such damages appear as losses of a power in military weapon system or as a blackout in aerospace equipment and eventually caused in gross loss of national power. In this paper, we have implemented a RDC(Radiation detection and control module) as a part of the radiation protection technology of the electronic equipment or devices from the pulsed gamma radiation. The RDC, which is composed of pulsed gamma-ray detection sensor, signal processors, and pulse generator, is designed to protect the an important electronic circuits from the a pulse radiation. To verify the functionality of the RDC, LM118s, which had damaged by the pulse radiation, were tested. The test results showed that the test sample applied with the RDC was worked well in spite of the irradiation of a pulse radiation. Through the experiments we could confirm that the radiation protection technology implemented with the RDC had the functionality of radiation protection for the electronic devices.

Protecting of Electrical Equipment Faults Caused by Magpie (까치에 의한 전력설비 피해방지 대책)

  • Bang, J.S.;Lee, J.S.;Park, Y.K.;Lim, K.J.;Jeong, K.H.;Choi, S.C.;Sin, S.S.
    • Proceedings of the KIEE Conference
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    • 1998.07e
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    • pp.1663-1665
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    • 1998
  • The power distribution system is 22.9 kV-y neutral point multi-ground one in our country. So, if conducting materials contacted, to the power line electrical equipment faults or stoppage of electrical power supply happened in the line. contacts are caused by magpie or its nest materials, especially, electrical power incidents by magpie from February to May, season layed egg, is high as 30% as. It is important to electrical power supplier to protect electrical power equipment caused by magpie. From now, KEPCO have tried to protect electrical power equipment faults caused by magpie using several methods, but have not acquired good results and continued to withdraw the nest. Recently, nature environment protection expand to around country and KEPCO also changed the nest withdrawal method to new pre-protection method coexisted with magpie, "Environmental Affinitive Pre-protection Counterplan". Therefore, we planned environmental affinitive pre-protection equipment, set test line. Also, after analyzed its effects during 1 year, we satisfied with results, and then expanded to other test lines and regions.

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The investigation of field condition on flood protection of substation and underground power equipment (pad-mounted transformers & switches) (수변전실 및 지중 배전기기의 침수 방지 관련 현장 조사 분석)

  • Kim, Gi-Hyun;Choi, Myeong-Il;Bae, Suk-Myong;Lee, Jae-Yong
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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    • 2007.11a
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    • pp.327-331
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    • 2007
  • Inundation of substation and underground power equipment(pad-mounted transformers & switches) breaks out every summer season in low-lying downtown and low-lying shore by localized heavy rain, typhoon and tidal wave. In case inundation of substation and underground power equipment, it occurs a great economic loss owing to recovery time and events of electric shock occur by inundation electrical facility. So we search the damage situation and installation situations. Therefore we propose the necessity of protection of flood at low-lying downtown and low-tying shore. This paper will be used to present a reform proposal of electrical related law about flood protection of existing power equipment.

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Comparison and Analysis of Domestic and Foreign Standard for electrical equipment installation of amusement park and ride (유원시설 전기설비 설치에 대한 국내외 규정 비교 분석)

  • Kim, Gi-Hyun;Kim, Chong-Min;Kim, Han-Sang
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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    • 2004.05a
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    • pp.378-382
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    • 2004
  • This paper gives information which is applied to install the electrical equipment of amusement park and ride. For analyzing the standard of electrical equipment installation, we research the related regulation of National Electrical Code(2002), IEC 60364-series and Technical standards for Electrical facilities of internal standard. Among electrical equipments of amusement park and ride, especially we study the transformer vaults, overcurrent protection and ground protection of electrical equipment. So we the furnished the installation information of transformer vaults, overcurrent and ground protection at amusement park and ride.

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Design of Lightning Induced Transient Protection Circuit for Avionics Equipment Considering Parasitic Inductance (기생 인덕턴스를 고려한 항공기 탑재장비의 간접낙뢰 보호회로 설계)

  • Sim, Yong-gi;Cho, Seong-jin;Kim, Sung-hun;Park, Jun-hyun;Han, Jong-pyo
    • Journal of Advanced Navigation Technology
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    • v.21 no.5
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    • pp.459-465
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    • 2017
  • In this paper, we introduce the design consideration of the lightning induced transient protection circuit for the indirect lightning strike on the avionics equipment. The lightning induced surge voltage, which is so-called as indirect effects of lightning, may cause a functional failure or physical damage to the electrical and electronic equipment of aircraft. In order to protect the electrical and electronic equipment of aircraft from the indirect effects of lightning, we should analyze the effect of lightning strike on aircraft and consider applying protection design for each avionics device. However, lightning induced transient protection circuits can have unintended consequences because parasitic inductance elements are exist in PCB and TVS diodes. In this paper, we introduce the design method of the protection circuit considering the parasitic inductance of the protection circuit. In addition, we show the result of verification test performed to validate the protection circuits for indirect effects of lightning.