• 제목/요약/키워드: interior wiring

검색결과 11건 처리시간 0.027초

옥내배선 길이에 따른 단락 특성의 실험적 연구 (An Experimental Study on Short Circuit Characteristics by the Interior Wiring Length)

  • 송재용;김진표;조영진;최돈묵;오부열;길경석
    • 한국안전학회지
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    • 제27권4호
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    • pp.38-42
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    • 2012
  • This paper describes electrical fire on residential environment such as apartment and detached house caused by defect of interior wiring. We carried out experimental study on short circuit characteristics by the interior wiring length. We were measured arc current, arc energy and interrupting time of earth leakage current circuit breaker(ELB), when an interior wiring break out short circuit in residential environment. From the experiment results, the longer of the interior wiring, the magnitude of arc current decreased and the interrupting time of ELB increased. When applied the A maker's ELB, the strength of arc current and interrupting time of ELB was 254 A and 245 ms respectively at 30 m interior wiring length. In 3 m interior wiring length, arc current and interrupting time was 716 A and 4.24 ms respectively. Arc energy was dependent on the magnitude of arc current and the interrupting time of ELB, the longer the interrupting time, arc energy increasing. In this paper, minimum arc energy was 277 J using C maker's ELB and 3 m interior wiring length(arc current 283 A, interrupting time of breaker 6.28 ms). Therefore in the residential environment, short circuit caused by defect of the interior wiring lead to electrical fire.

자동차 전장설계 옵션별 출도 및 관리시스템 개발 (A Development of Advanced Wiring Harness Design System for a Vehicle)

  • 김원중;이수홍
    • 한국CDE학회논문집
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    • 제8권3호
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    • pp.184-188
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    • 2003
  • The harness design process consists of repetitious routines to decide the wire configuration in its interior. A slight change in one of the wire's configuration will require a total reconfiguration of the entire wire system. Therefore, the harness design is extremely time consuming and is vulnerable to human errors by an engineer. Based on both electrical and mechanical area, Wiring Harness system is in complicated area. Existing systems are, therefore, not exactly suitable for practical use. This paper presents a novel framework for ameliorating existing system's defects. In this paper, Visio and Visual Basic was interfaced to process wire bundle information and wire bundle location to alleviate problems mentioned beforehand concerning harness design; at the same time developing the automation of the entire design process based on the feature based design method, optional print, and management of documents for reuse.

필드버스를 이용한 신호설비 제어 및 감시에 관한 연구 (A study on Control and Monitoring for Signaling system use Fieldbus)

  • 박채영;이준호;김용규
    • 한국철도학회:학술대회논문집
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    • 한국철도학회 2005년도 추계학술대회 논문집
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    • pp.1016-1020
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    • 2005
  • The real-time monitoring and controlling between the interior and the field signaling security devices is a necessity for the train safety in terms of the train operating plan. The type wiring lower the safety level of signaling security device, because too much wiring makes the maintenance more difficult and it might be have a problem of an induction field and contact. It also need high cost. The single network communication(Fieldbus) does not need that much wiring, and the maintenance will be easier. It also guarantee the high level of stability.

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공동주택의 분기회로 및 콘센트 수 기준설정에 관한 조사연구 (A Field Study on the Standard of Electric Branch Circuit and Receptacle in Apartment)

  • 정지열;김채규;김호식
    • 한국조명전기설비학회지:조명전기설비
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    • 제5권2호
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    • pp.67-76
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    • 1991
  • 본 연구는 기존아파트를 대상으로 콘센트사용실태, 기구배치 및 가전기기사용형태를 조사하여 공동주택에 적합한 분기회로수와 콘센트수를 산정제시하였다. 이 기준안을 적용하면, 배선설비를 합리적으로 설계할 수 있고 거주자가 가전기기 및 배선기구를 사용시 안전성, 편리성을 높여 주는 등 그 적용효과가 클 것으로 기대된다.

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전선의 접속부에서 직렬아크에 의한 전기적 및 열적 신호 분석 (Analysis of Electrical and Thermal Signal for Series Arc in Electrical Contact)

  • 김두현;황동규
    • 한국안전학회지
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    • 제30권5호
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    • pp.1-7
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    • 2015
  • This paper is aimed to analyze the electrical and thermal signal such as ignition possibility, ignition time, thermal characteristics and arc fault power that are associated with electrical fire in case of the occurrence of series arc at IV wiring used for interior wiring at commercial power source. In order to analyze the signal, series arc was induced by generating the constant vibration through vibrating device in the one phase (R phase) and ignition possibility was analyzed along the condition of current value by adding cotton material to the contact point of wiring. The ignition time is shortened as the electric current value increased, burning time is not associated with current value and the temperature rose up to $740^{\circ}C$ though it was not ignited. It was checked out that the temperature was the energy source enough that can generate the fire related with insulation aging of wiring and the inflammable. The possibility of electrical fire by series arc was shown as more than 12% at 5A, more than 42% at 20A and arc showed 27W at 5A, 180W at 20A. It was confirmed that the possibility of electrical fire exists at the condition as above and the circuit breaker did not operate. This data can be used as the reference value for the investigation of electrical fire or development of the circuit breaker.

과전류 상태에서 고전압이 전선의 위험성에 미치는 영향

  • 백승명;류경희;김상현;김현희
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2009년도 추계학술대회 논문집
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    • pp.235-235
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    • 2009
  • This paper is that study transformation and insulating performance decrease of HIV wire which is using at general electricity structure or home interior wiring of less than AC 600V by over current. When current raised 1A at 1sec, HIV wire insulator is partial charred with white smoke at 86A and conductor of HIV wire is exposed at 90A. When keep time for 5 minutes, insulating performance of the HIV wire decreased rapidly at 45A.

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과부하에 의해 변형된 비닐절연전선의 구조변화 분석 (Analysis on the Structure Variation of IV Transformed by the Overload)

  • 최충석;김형래;송길목;김향곤;김동욱;김동우
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2002년도 하계학술대회 논문집
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    • pp.398-401
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    • 2002
  • When the current flows over the allowable current due to the overload, it causes electric disaster such as an electrical fire and an electric shock by short current or leakage of electricity because the covering is deteriorated according to the heating action. In this paper, for the wire(IV 1.6mm) used as interior wiring, we analyzed a variation of the surroundings temperature, the form and the structure of a covering, and the crystal structure of a conductor. In the result of this experiment, the surroundings temperature at the allowable current of 300% rose to about 47$^{\circ}C$, and it rose up to the maximum allowable temperature of the wire at 400%. Consequently, it was broken within one minute at 500%. In the analysis of a metallograph, the conductor broken by the over current showed the dendrite. These analyses result will be applied to judging the electrical fire.

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OBSERVATION ERROR OF TIME-LAPSED PHOTOS IN CONSTRUCTION OPERATION MONITORING

  • Jiwon Choi;Julian Kang
    • 국제학술발표논문집
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    • The 1th International Conference on Construction Engineering and Project Management
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    • pp.1042-1047
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    • 2005
  • A web-based camera (webcam) is expected to enhance construction operation monitoring. However, webcams are often installed outside a building because their mobility is limited by cable wiring, which makes it difficult to monitor construction operations inside the building. If a webcam is integrated with emerging wireless communication technologies, construction professionals may be able to monitor interior construction operations using webcams without getting network cables wired on a congested and dynamic construction job site. However, one may concern that wireless communication may not be fast enough to transport all webcam images seamlessly. This paper presents an investigation as to the observation error of webcam images when a limited amount of images are delivered.

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아파트 단위주호 개발에서 선택사양 구성을 위한 기초연구 (A Basic Study on the Optional Composition for Apartment Housing Design)

  • 조성희;이은주
    • 한국주거학회논문집
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    • 제21권3호
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    • pp.67-76
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    • 2010
  • The purposes of this study are to understand residents' needs in regard to living space and to suggest how to provide layout options for the infill, based on their needs, so that the residents can change their living space to suit their own need. This study analyzed residents' needs in terms of living spaces through literature reviews on apartment remodeling and related previous studies. The results are as follows: First, the residents remodeled the various infill, and remodeling works are then classified into five infill groups according to the flexible features: 1) structural elements, such as flooring, ceilings, interior walls, and windows/doors; 2) equipment elements, such as lighting and electricity, electrical wiring, heating arrangements, and water supply & drainage systems: 3) finishing material elements, such as finishing materials for floors, walls, and ceilings, skirting boards, moldings, and art walls; 4) furniture elements, such as built-in wardrobes, storage closets, and kitchen cabinets; and 5) bathroom facility elements such as faucets and sinks. Second, based on the remodeling features, four ways to provide options can be suggested. 1) options are provided for each room; 2) options are provided in connection with structural elements; 3) options are provided for each finishing material element; and 4) options are provided with the combinations of different bathroom facilities.

Airtightness of Light-Frame Wood Houses built in Daejeon and Chungnam Area

  • Jang, Sang-sik;Ha, Been
    • Journal of the Korean Wood Science and Technology
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    • 제45권2호
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    • pp.147-158
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    • 2017
  • Among the energy consumption in building, the heating energy takes the largest part. Therefore, it is important to minimize the heat energy loss in building for the reduction of overall energy use in construction. The most important points for the minimization of energy loss in building are insulation and airtightness. Especially, in wood houses, airtightness is very important for energy saving as well as increase of durability. However, the researches on airtightness of wood buildings have been started recently and are very deficient especially in Korea. In this study, air leakage properties and airtightness performance were evaluated for light-frame wood houses built in Daejeon and Chungnam area. Total 7 houses were evaluated, among which four houses (Case 1 to Case 4) were in the construction stage before interior finish and the other three houses (Case 5 to Case 7) were after completion of construction work. The tests for airtightness were conducted by pressurization-depressurization method, and the factors included in the measurements includes air leakage rate at 50 Pa (CMH50), air change rate at 50 Pa (ACH50), equivalent leakage area (EqLA) and EqLA per floor area. As a result of this study, key air leakage points in wood houses were found to be the gaps between floor and wall, the holes for wiring and plumbing, the double glasses windows and the entrance doors. The average value of ACH50 for the houses after completion of construction work was $3.5h^{-1}$ that was similar to Europe standard ($3.0h^{-1}$). ACH50 was proportional to EqLA per floor area but inversely proportional to the internal volume, the net floor area and the area of window.