Electrotechnical Commission

At the international level, the official organization is the ISO (International Organization for Standardization) and its counterpart for the electrical industries, the lEC (International Electrotechnical Commission). 

CEI/IEC Commission Electrotechnique Internationale/ International Electrotechnical Commission... 

International Bureau of Weights and Measures Pavilion de Breteuil P-92310, Sevres, Prance International Electrotechnical Commission (lEC) 1 me de Varembe 1211 Geneve 20 Swit2edand International Organization for Standardization (ISO) 1 me de Varembe CH 1211, Geneve 20 Switzedand... 

International Electrotechnic Commission, International Standard 751, A.mendment 2 (1005), 1976. 

Methodsfor Measuring the Peformance of Electric Dishwashers, pubhcation 436, 2nd ed.. International Electrotechnical Commission Standard, 1981. 

Also, the electronic control-valve device s level of immunity to, and emission of, electromagnetic interference (EMI) can be an issue in the chemical-valve environment. EMI requirements for the control-valve devices are presently mandatory in the European Community but voluntary in the United States, Japan, and the rest of the world. International Electrotechnical Commission (lEC) SOI, Parts I through 4, Electromagnetic Compatibihty for Industrial Process Measurement and Control Equipment, defines tests and requirements for control-device immunity. Immunity and emission standards are addressed in CENELEC (European Committee for Electrotechnical Standardization) EN 50 081-1 1992, EN 50 081-2 1993, EN 50 082-1 1992, and prEN 50 082-2 1994. 

Electrotechnical Commission (lEC) in close collaboration with the International... 

H. Breunig, F. Lieneweg. Handbucb der technischen Temperaturmessung. Vieweg, 1976. lEC 60751 (1983-01). Industrial Platinum Resistance Thermometer Sensors. International Electrotechnical Commission, 1983. 

The International Electrotechnical Commission (lEC) has placed hydrogen, acetylene, carbon disulfide, and ediyl nitrate into Group IIC. The United States, on the odier hand, has separated hydrogen and acetylene into different groups and does not classify carbon disulfide. 

Flame arresters are categorized by the MESG of the gas being handled and its corresponding classification by the National Electrical Code (NEC) groups in the US or the International Electrotechnical Commission (lEC) groups in Europe (see Chapter 5). 

To ensure the safety and reliability of batteryusing technology, the American National Standards Institute (ANSI), the International Electrotechnical Commission (lEC) and the International Standards... 

It is the general consensus within the worldwide fire community that the only proper way to evaluate the fire safety of products is to conduct full-scale tests or complete fire-risk assessments. Most of these tests were extracted from procedures developed by the American Society for Testing and Materials (ASTM) and the International Electrotechnical Commission (IEC). Because they are time tested, they are generally accepted methods to evaluate a given property. Where there were no universally accepted methods the UL developed its own. 

Standards may be developed at global level through the International Standards Organisation (ISO) or the equivalent International Electrotechnical Commission (lEC) for electrical equipment. These contain representatives from standards bodies... 

General Requirements for the Competence of Testing and Calibration Laboratories , ISO/IEC 17025 2005, International Organization for Standardization (ISO)/Intemational Electrotechnical Commission (IEC), Geneva, Switzerland, 2005. 

IEC (1998), IEC 61508, Functional Safety of Electrical/Electronic/Programmable Electronic Safety-related Systems, Parts 1-7, Geneva International Electrotechnical Commission. 

IEC (2001), IEC 61511, Functional Safety Instrumented Systems for the Process Industry Sector, Parts 1-3. (Draft in Process), Geneva International Electrotechnical Commission. 

However, the standard used in the United States and the standards used in Europe do not coincide. The dissimilarities are due to a difference in the manner in which hazardous environments are classified and to a divergence in philosophy over the safety factor employed. NFPA 493 uses a safety of 1.5 pertaining to the total energy, while the International Electrotechnical Commission (IEC) and European Committee for Electrotechnical Standardization (CENELEC) require a safety factor of 1.5 for the voltage or current, which relates to a 2.25 factor of safety for the energy. 

References Guidelines for Safe and Reliable Instrumented Protective Systems, American Institute of Chemical Engineers, New York, 2007 ISA TR84.00.04, Guidelines for the Implementation of ANSI/ISA 84.00.01-2004 (IEC 61511), Instrumentation, Systems, and Automation Society, N.C., 2005 ANSI/ISA 84.00.01-2004, Functional Safety Safety Instrumented Systems for the Process Industry Sector, Instrumentation, Systems, and Automation Society, N.C., 2004 IEC 61511, Functional Safety Safety Instrumented Systems for the Process Industry Sector, International Electrotechnical Commission, Geneva, Switzerland, 2003. 

Safe Automation and ANSI/ISA 84.01-1996 served as significant technical references for the first international standard, IEC 61511, issued by the International Electrotechnical Commission (IEC). In the United States, IEC 61511 was accepted by ISA as ISA 84.00.01-2004, replacing the 1996 standard. In 2004, the European Committee for Electrotechnical Standardization (CENELEC) and the American National Standards Institute (ANSI) recognized IEC 61511 as a consensus standard for the process industry. IEC 61511 covers the complete process safety management life cycle. With its adoption, this standard serves as the primary driving force behind the work processes followed to achieve and maintain safe operation using safety instrumented systems. 

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