• Title/Summary/Keyword: IEC Standards

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Modification of IEC Flickermeter to Measure the Flicker Caused by Inter-Harmonics (상호고조파에 의한 플리커의 측정에 가능한 IEC 플리커미터의 설계)

  • Cho, Soo-Hwan;Jung, Jae-Ahn;Jang, Gil-Soo;Kwon, Sae-Hyuk
    • Proceedings of the KIEE Conference
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    • 2007.07a
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    • pp.69-70
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    • 2007
  • Now the IEC flicker measuring algorithms and its flicker index of $P_{st}$ and $P_{lt}$ are accepted internationally as standards. But it is recently found that IEC flickermeter has a main drawback that it cannot afford to detect the fluctuating patterns of voltage envelope caused by interharmonics higher than 102Hz in the 60Hz power system. This is brought about by two components of IEC flicker measuring steps, squaring and low-pass filtering. This paper presents the innate defect of IEC flickermeter and proposes a modified measuring method considering the voltage flickers by subharmonics and interharmonics.

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A Study on Graphical Modeling Methods for Systems Engineering Standard Processes (시스템공학 표준 프로세스에 대한 그래픽 모델화 연구)

  • Lim, Yong-Taek;Lee, Byoung-Gil;Lee, Jae-Chon
    • Journal of the Korean Society of Systems Engineering
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    • v.2 no.2
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    • pp.27-32
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    • 2006
  • The emerging standards since 1990's can be classified as 'system standards' (process-oriented standards) and they specify the process of an enterprise and also apply to almost all industries regardless of size, type and products. Notice that the conventional specification-oriented standards present relatively clear criteria even though the structure, performance, and terminology are defined in text-based form. However, the system standards dealing with the processes do not present a coherent guide. Therefore, it is difficult to analyze them with the same viewpoint, thereby resulting in differences in the level of understanding. This study is aimed at graphically modeling the system standards originally described in text-based form. The study has been carried out in the framework of the PMTE (Process, Methods, Tools, and Environment) paradigm. The system standard targeted here is ISO/IEC 15288. Firstly, review of the literature on the systems engineering (SE) standard/process and on the graphic model IDEF0 was done, respectively, for the parts of 'E' and 'M'. Then the SE process of the MIL-STD 499B was applied to ISO/IEC 15288 as 'P'. Finally, the graphical model was generated by AI0Wins as 'T'. As a result, the graphical model-based approach can complement the drawbacks of the text-based form.

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Considerations on Standardization in Smart Hospitals

  • Sun-Ju Ahn;Sungin Lee;Chi Hye Park;Da Yeon Kwon;Sooyeon Jeon;Han Byeol Lee;Sang Rok Oh
    • Health Policy and Management
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    • v.34 no.1
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    • pp.4-16
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    • 2024
  • Smart hospitals involve the use of recent ICT (information and communications technology) technologies to improve healthcare access, efficiency, and effectiveness. Standardization in smart hospital technologies is crucial for interoperability, scalability, policy formulation, quality control, and maintenance. This study reviewed relevant international standards for smart hospitals and the organizations that develop them. Specific attention was paid to robotics in smart hospitals and the potential for standardization in this area. The study used online resources and existing standards to analyze technologies, standards, and practices in smart hospitals. Key technologies of smart hospitals were identified. Relevant standards from ISO (International Organization for Standardization) and IEC (International Electrotechnical Commission) were mapped to each core technology. Korea's leadership in smart hospital technology were highlighted. Approaches for standardizing smart hospitals were proposed. Finally, potential new international standard items for robotics in smart hospitals were identified and categorized by function: sampling, remote operation, delivery, disinfection, and movement tracking/contact tracing. Standardization in smart hospital technologies is crucial for ensuring interoperability, scalability, ethical use of artificial intelligence, and quality control. Implementing international standards in smart hospitals is expected to benefit individuals, healthcare institutions, nations, and industry by improving healthcare access, quality, and competitiveness.

Guidelines for Project Quality Management System (프로젝트 품질경영시스템 지침)

  • Choi Sung-Woon
    • Proceedings of the Safety Management and Science Conference
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    • 2006.04a
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    • pp.525-544
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    • 2006
  • This paper is to introduce guidelines for project quality management system. International standards such as ISO 10006, IEC 62198, ISO/IEC TR 16326 and ISO 15188 are considered. This study is to discuss guidelines for quality management in projects, and application guidelines for project risk management, and guide for the application of ISO/IEC 12207 to software project management, and project management guidelines for terminology standardization.

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Guidelines for Risk Management and Analysis (리스크 관리 및 분석 지침)

  • Choi Sung-Woon
    • Proceedings of the Safety Management and Science Conference
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    • 2006.04a
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    • pp.513-523
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    • 2006
  • This paper is to introduce guidelines for risk management and analysis. International tandards such as IEC 60300-3-9, IEC 61511-3, ISO 14971-1 and ISO/IEC Guide 73 are considered. This study is to discuss risk analysis of technological systems, and guidelines in the application of hazard and risk analysis for functional safety instrumented system, and risk management of medical devices, and guidelines for use in risk management standards.

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A Study of Railway RAMS Application (철도 RAMS의 적용에 관한 고찰)

  • Kim Jong-Ki;Lee Jong-Woo;Lim Hoon
    • Proceedings of the KSR Conference
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    • 2003.05a
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    • pp.505-510
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    • 2003
  • The interests about railway safety have been highly increased. Early railway safety was widely studied in Europe and Japan, and safety standards were established in 1990s. EN 50126 of CENELEC, Railway applications - Specification and demonstration of RAMS, became IEC 62278 in 2002. This standard provides Railway Authorities and railway support industry with a process which will enable the implementation of a consistent approach to the management of RAMS. IEC 62278 will be often referred to in the field of railway system. This paper examined the application of railway RAMS on basis of IEC 62278.

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A Study on the Measurement of the Winding Resistance Influences the Efficiency Evaluation of 3phase Induction Motors (삼상유도전동기 권선저항 측정이 효율 산출에 미치는 영향에 관한 연구)

  • Kang, Byung-Guk;Kim, Kwang-Min;Lee, Ju
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.30 no.3
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    • pp.73-78
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    • 2016
  • 3phase induction motor consumes 40% of national electric power. so It is one of the most important electric device for the national power policy. The efficiency measurement is carried out by IEC standards. After the temperature rise test, It's difficult to measure the winding resistance immediately. because of inertia and power cut-off time. Therefore, IEC standards suggest the measurement time. But during the measurement time, the winding temperature cools down. It causes the value of winding resistance is variable. Several conditions which possibly occurred by the measurement time of IEC 60034-1 are suggested. and The efficiency evaluation of 3phase induction motors is carried out by IEC 60034-2-1 with the several conditions. As the results, we find out the winding resistance rapidly goes down within 15 sec. so It proves that the winding resistance should be measured within 15 sec. for the efficiency evaluating of 3phase induction motor.

Consistent Comparison for The Linearity Air Kerma of IEC Standards and Commercial Load in Diagnosing DR Generators (진단용 DR 발생장치에서 IEC 표준규격과 상용부하의 공기커마 직선성에 대한 일관성 비교)

  • Han, Beom-Hui;Kim, Chong-Yeal;Lee, Sang-Ho;Han, Sang-Hyun;You, In-Gyu
    • Journal of the Korean Society of Radiology
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    • v.6 no.5
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    • pp.389-394
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    • 2012
  • In this study, based on IEC 60601-2-54 standard load conditions presented in the limited interval over the air kerma at the absolute linearity closely evaluated by measuring the X-ray results were as follows: 10 units targeted all Diagnostic X-ray generating device (DR) presented in the IEC 60601-2-54 standard linearity of air kerma emerged as inappropriate, the general evaluation of the dose linearity from four in the top 50% and 80 kVp % of the two measurement series were as irrelevant all the rest from six of the top tube voltage of 50% and 80% of the two measurement series, appeared in all suitable. Presented in IEC 60601-2-54 standard dose linearity testing and conventional linearity tests showed many differences. IEC 60601-2-54 standard linearity in the proposed international standards of air kerma is the recommendation of the existing dose linearity considerably more feasible, and to quantify the amount of radiation as the standard suggested by the standard IEC 60601-2-54 air kerma of a diagnostic X-ray imaging device linearity performance management is considered key elements in the critical appraisal.

Conversion and Storage of NMEA 2000 PGN Data into IEC 61162-4 Tag Format (NMEA 2000 PGN 데이터의 IEC 61162-4 Tag 포맷으로의 변환 및 저장)

  • Lee, Ju-Hyoung;Jang, Nam-Ju;Lee, Jung-Woo;Park, Hyu-Chan;Lee, Jang-Se;Jang, Kill-Woong
    • Journal of Advanced Marine Engineering and Technology
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    • v.34 no.4
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    • pp.522-531
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    • 2010
  • Appropriate networks are required for the processing of various kinds of data generated on shipboard. The international standards, NMEA 2000 and IEC 61161-4, meet this requirement. NMEA 2000 is good for the processing of real time data, and IEC 61162-4 is better for the integrated management of such data. Therefore, NMEA 2000 data should be conversed into IEC 61162-4 format for the integrated management. This paper presents files and algorithm for the format conversion, and also describes their implementation.

Recent Trend of International Standards on the Safety Criteria for Electric Shock Protection (인체감전 안전기준에 관한 최근 국제규격의 동향)

  • Lee, Jong-Chul;Kim, Han-Soo;Lee, Ju-Chul;Kang, Sung-Man
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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    • 2007.11a
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    • pp.189-193
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    • 2007
  • The grounding of an electrical system is one of the essential elements for public safety. Domestic practice of grounding system design has been to get grounding resistance values which are classified by facilities or equipment in the regulations. But the concept of grounding system design of IEC is, as a main factor of safety index, to consider touch voltage and step voltage instead of the resistance value itself. Recently IEC actively develops or revises safety related standards which are essential for the grounding system performance. In this paper, we present the recent trend of the international standards on the safety criteria for Electric Shock Protection.

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