• 조명전기설비학회논문지
• /
• 제21권5호
• /
• pp.75-81
• /
• 2007

본 논문에서는 전기안전에 대한 부가서비스 같은 저전압 전기설비의 온라인 감시시스템 구축을 위한 국내외 실태조사를 수행하였다. 일본은 미래 정보화 사회를 위해 IT 기본법에 근거한 온라인 전기설비 감시시스템 서비스를 실시하고 있으며, 전기안전뿐만 아니라 지진이나 방범등의 부가서비스를 실시하고 있었다. 미국 및 유럽에서는 전력선 통신을 사용하여, 온라인 감시 및 빌딩군 관리 서비스를 실시하고 있었다. 국내에서도 전기안전과 관련하여 디지털 수배전반 등을 통해 누설전류 측정, 부하관리 등에 대한 서비스를 일부 기업에서 서비스를 실시하고 있었다. 실태조사를 통해, 국내에서도 시장 활성화를 위한 법, 제도적 개선이 필요할 것으로 판단된다.

• 한국태양에너지학회 논문집
• /
• 제39권6호
• /
• pp.55-65
• /
• 2019

With the rapid development of the national industry, the importance of electrical safety was recognized because of a lot of new electrical equipment are installing and the electrical accidents have been occurring annually. Today, the electrical equipments is inspect by using the portable Infrared thermal imaging camera. but the most negative element of using the camera is inspected for only state of heating, the reliable diagnosis is depended with inspector's knowledge, and real-time monitoring is impossible. This paper present the infrared thermal imaging safety diagnosis system. This system is able to monitor in real time, predict the state of fault, and diagnose the state with analysis of thermal and power data. The system consists of a main processor, an infrared camera module, the power data acquisition board, and a server. The diagnostic algorithm is based on a mathematical model designed by analyzing the Pearson's Correlation Coefficient between temperature and power data. To test the prediction algorithm, the simulations were performed by damaging the terminals or cables on the switchboard to generate a large amount of heat. Utilizing these simulations, the developed prediction algorithm was verified.

• 조명전기설비학회논문지
• /
• 제21권4호
• /
• pp.88-95
• /
• 2007

Korea is highly dependent on foreign countries for energy while at the same time having a high energy-consumption industrial structure. Therefore, logical improvements in energy use efficiency and nationwide energy saving are becoming more and more important in coping with the worldwidehigh oil prices and environmental issues such as listed in the Kyoto Protocol to the United Nations Framework Convention on Climate Change. Consequently, a study was conducted on the average annual load factor in domestic areas to set a reasonable and reliable technology standard plan for high-efficiency transformers. The average annual load factor in Korea was discovered to be 18.4[%] classified by industry. This factor is expected to be used in arranging a domestic standard for a minimum efficiency system for transformers, and in reviewing and supplementing the standard transformers plan for the High Energy-Efficiency Appliance Certification. The expected effect from the establishment of the technology standards plan for highly efficient transformers is the expansion of the manufacturing and distribution of highly efficient transformers that are suitable for domestic use. These will lead to electricity cost savings for users, strengthening the related industries' market competitive powers and the effective reduction of greenhouse gases on a national level by drastically reducing loss from transformers, which accounts for a large portion of the total electric supply losses.

• 한국안전학회지
• /
• 제29권5호
• /
• pp.47-53
• /
• 2014

Despite the automatic fire alarm system, according to the national fire data system of national emergency management agency, the fires account for 40,932 incidents, 2,184 injuries and about 430 billion won in property losses in 2013. Since the conventional automatic fire alarm system has several weaknesses related to electrical signal such as noise, surge, lighting, etc. Most fires are mainly caused by electrical faults, mechanical problem, chemical, carelessness and natural. The electrical faults such as line to ground fault, line to line fault, electrical leakage and arc are one of the major problems in fire. This paper describes the development of a novel real-time fire monitoring system algorithm including fault detection function which puts the existing optic smoke and heat detectors for fire detection with current and voltage sensors in order to utility fault monitoring using high accuracy DAQ measurement system with LabVIEW program. The fire detection and electrical fault monitoring with a proposed a new detection algorithm are implemented under several test. The fire detection and monitoring system operates according to the proposed algorithm well.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 2001년도 춘계학술대회 논문집 전력기술부문
• /
• pp.140-143
• /
• 2001

As global trade system transferred GATT into WTO, the harmonization of technological standards, certification, construction, testing is the trend of world. This drift is based on WTO / TBT agreement coming. In effect after 12th, April, 1979. For Korea, the distribution system has a strong resemblance to American system so that engineers are confused in adopting standards. IEC60364 and NEC are in part similar but unconvertible because IEC 60364 originated from Europe while NEC originated from USA. This thesis deals with the fundamental elements of electrical safety system with comparing IEC 60364 with NEC. It serves as a guide how to apply standards when engineers select electrical installations.

• 한국조명전기설비학회:학술대회논문집
• /
• 한국조명전기설비학회 2008년도 춘계학술대회 논문집
• /
• pp.361-364
• /
• 2008

This paper deals with assessment of electrical safety for grounding system of buildings by investigation on the spot at construction site. The investigation was carried out for grounding method, grounding type, shape of grounding electrode, grounding for lightning protection system, continuity of steelwork in reinforced concrete structure and so on. The investigation on the spot was performed by researcher, engineer with over fifteen years of industry experience all over the country. As a result of investigation on the spot to 13 buildings, common grounding method was dominant. A new grounding system based on international standards includes unity grounding system, structure grounding utilizing steel reinforced concrete, equipotential bonding. use of surge protective device.

• International Journal of Safety
• /
• 제11권2호
• /
• pp.15-21
• /
• 2012

This paper is aimed to develop an electrical fire detection system (EFDS) which can analyze the possibility of electrical fire for overcurrent, leakage current and arc signals of panel board in traditional market shop. The EFDS adopted fuzzy logic and precursory data for overcurrent, leakage current and arc signals to evaluate the possibility of electrical fire. The signals are obtained directly from panel board in traditional market shops and fuzzy membership function is obtained from experiment, simulation, expert's advice. The overcurrent data is acquired by thermal data of normal and abnormal states (partial disconnection) on the insulated electrical wire, in accordance with the increase of the current signal, The leakage current data is obtained under various environments. The arc signal is acquisited by waveforms of instantaneous value in time domain and frequency band in frequency domain. The Fuzzy algorithm for DB of EFDS consists of fuzzification, inference engine by Mamdani's method and defuzzification by center of gravity method. In order to verify the performance and reliability of EFDS, it was applied to Jeon-Ju traditional market shops (90 shops) in Korea. Results show that EFDS in this paper is useful in alarming the fire case, which will prevent severe damage to human beings and properties, and reduce the electrical fires in a vulnerable area of electrical disaster.

• 전력전자학회:학술대회논문집
• /
• 전력전자학회 2016년도 전력전자학술대회 논문집
• /
• pp.15-16
• /
• 2016

본 논문에서는 케이블 결함과 위치를 검출하기 위한 SSTDR(spread spectrum domain reflectomerty) 기반의 진단 장치를 개발하였다. 개발된 진단 장치는 sstdr 기법의 검출 성능을 향상시키기 위해 시간-주파수 상관 분석을 이용하여 기준신호(reference signal)의 상관계수 최댓값 위치를 검출 한 후 기준신호를 제거하여 반사신호의 상관계수의 최댓값 위치를 검출하는 2단계 과정을 갖는다. 개발된 케이블 결함 진단 장치는 실증 시험장을 구축하고, 성능시험을 실시한 결과, ${\pm}1%$ 내 외의 오차를 갖는 것으로 확인되었다.

• 한국수소및신에너지학회논문집
• /
• 제23권4호
• /
• pp.330-336
• /
• 2012

FCEV uses 250 ~ 450 V instead of using 12 V battery. High voltage vehicle can cause electric shock, fire and explosion accident. Therefore, it has potential factors that can cause hazard of safety for users. United states of America and Europe legislate regulations such as ECE R100, FMVSS 305 for regulating electrical safety during driving or after collision. The company manufacturing high voltage components must do advanced R&D about Method for improving and confirming the safety of high voltage. We develop the specific hardware components of high voltage wiring system for the power train system and power supply system of Hyundai Motors FCEV. This paper shows test method of insulative performance for securing the electrical safety of high voltage components such as power cable, connectors and buss-bar, and proposals the guide line value for human safety of FCEV according to the test result of our development components.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 2001년도 하계학술대회 논문집 A
• /
• pp.47-50
• /
• 2001

Presently the Korean grounding system uses TN system, multi-grounding method with TT independent grounding method. Nevertheless TN system can't exist with TT system in the technological terms. If they coexist, it causes ground-fault circuit not to operate, and brings about different electrical potential rise by customer system. It brings about serious problems for safety. This paper aims for improving method of grounding system based on the technical analysis on instances in foreign countries and Korea. Almost standards and construction manner were apt to be internationalized after WTO/TBT agreement was concluded. The internal grounding systems should meet the international criteria and reliability for safety, and be provided with technologically impeccable standards.