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In signal and control circuits that can operate with low currents and voltages, the intrinsic safety approach simplifies circuits and reduces installation cost over other protection methods. Areas with dangerous concentrations of flammable gases or dust are found in applications such as petrochemical refineries and mines.
Unlike ATEX which uses numbers to define the safety "Category" of equipment (namely 1, 2, and 3), the IEC continued to utilise the method used for defining the safe levels of intrinsic safety namely "a" for zone 0, "b" for zone 1 and "c" for zone 2 and apply this Equipment Level of Protection to all equipment for use in hazardous areas since ...
These barriers use an infallible resistor (wire-wound), Zener diodes and a fuse, and require a good intrinsically safe ground. While this barrier limited energy sufficient for Zone 0/1 all Gas Groups (Class I Div 1 all Gas Groups), it only provides 80 mA for the Fieldbus segment.
(Kletz originally used the term intrinsically safe in 1978, but as this had already been used for the special case of electronic equipment in potentially flammable atmospheres, only the term inherent was adopted. Intrinsic safety may be considered a special subset of inherent safety). In 2010 the American Institute of Chemical Engineers ...
The underappreciated link between these mundane activities is good balance, which geriatricians say is key to maintaining an independent lifestyle as we age. Lacking balance can be dangerous. In ...
The international standard IEC 60446 Basic and safety principles for man-machine interface, marking and identification - Identification of equipment terminals, conductor terminations and conductors was a standard published by the International Electrotechnical Commission (IEC) that defined basic safety principles for identifying electrical conductors by colours or numerals, for example in ...
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President-elect Donald Trump said Tuesday he plans to order “very serious tariffs” against Canada and Mexico — and vowed to rechristen the Gulf of Mexico as the “beautiful” Gulf of America.