Elsevier, 18 dic 2003 - 544 pagine
This book makes Hazardous or Electrical Area Classification simple. In plants processing flammable materials, every effort is made to avoid the escape of such materials and in addition, stringent measures are taken to exclude sources of ignition. A complex array of standards surround this topic which has lead to an overly conservative approach being taken. This type of approach means that much more expensive electrical apparatus than is necessary is installed.
To avoid this unnecessary expenditure, Dr Groh clearly explains the relevant standards, so that accurate assessment of the risks associated with hazardous areas is possible. He also identifies possible ignition sources and methods of designing apparatus which do not cause sparks thereby maintaining safety.
* Covers must-have information regarding IEC/CENELEC standards in electrical or hazardous area classification
* Provides a clear overview of a complex area
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4 Grouping and classification of explosion protected electrical apparatus
5 Marking and selection of explosion protected apparatus
6 The different types of protection constructional requirements
7 Analysers and analyser rooms
8 Testing explosion protected electrical equipment
9 Financial considerations selecting explosion protected electrical equipment
10 Inspection maintenance and repair of explosion protected equipment
11 Explosion protected apparatus for zone 0 and zone 2
12 Cable protection in coal mines and other areas hazardous due to combustibles
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according to IEC application associated apparatus ATEX busbar cable entries cage induction motor capacitance capacitor CENELEC certificate circuit breaker classification coal mines combustible dust comply components conductor EExia electrical apparatus electrical circuits equipment explosion protected explosive atmosphere fault field devices fieldbus Figure firedamp flame transmission flameproof enclosure fluorescent lamps galvanic isolation gas–air mixture gases Group hazardous areas high voltage hydrogen increased safety induction motor installation insulating material internal intrinsically safe apparatus intrinsically safe circuits IP code joint lamps limit low voltage luminaires maximum mbar MESG values methane module monitoring notified body operation output oxygen p-enclosure partial discharge phase conductor Physikalisch-Technische Bundesanstalt power supply Profibus protective gas purging range Rated power Rated voltage requirements rotor sensor spark standards surface switch switchgear Table Teil temperature class terminal compartment thermal Type of protection type test vapour volume zone
Pagina 29 - Zone 20 in which combustible dust, as a cloud, is likely to occur during normal operation, in sufficient quantity to be capable of producing an explosive concentration of combustible dust with air.
Pagina 30 - A place in which an explosive atmosphere consisting of a mixture with air of dangerous substances in the form of gas, vapour or mist is present continuously or for long periods or frequently. Zone 1 A place in which an explosive atmosphere consisting of a mixture with air of dangerous substances in the form of gas, vapour or mist is likely to occur in normal operation occasionally.