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Text version of the page
| 3. .statutory regulations and standards | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 14 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Zone 20 A place in which an explosive atmosphere in the form of a cloud of combustable dust in air is present continously, or for long periods or frequently. Zone 21 A place in which an explosive atmosphere in the form of a cloud of combustible dust in air is likely to occur in normal operation occasionally. Zone 22 A place in which an explosive atmosphere in the form of a cloud of combustible dust in air is not likely to occur in normal operation but, if it does occur, will persist for a short period only. Table 6 contains an overview of the zones and allocation of equipment according to the category. | Explosion protection document An explosion protection document has to be generated, which contains at least the following information: > assessment of the explosion risk > protective measures taken > zone classification > observance of minimum requirements. These are divided into organisational measures (instruction of workers, etc.) and technical measures (explosion protection measures). | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| .3 Standards | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| The European Standards EN 50014 - EN 50020 on electrical equipment were issued in 1978 and replaced the national standards for this equipment valid up until then Europe-wide. In addition to the standards for electrical equipment published by the CENELEC, standards for non-electrical explosion-protected equipment have since been developed by the CEN. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| According to an agreement between the European Committee for Electrotechnical Standardization CENELEC and the International Electrotechnical | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Commission IEC, the European standards for electrical equipment have been adopted unchanged by the IEC for several years. The European Standard series EN 50014, which defines the requirements on equipment to be used in explosive gas atmospheres, will be gradually replaced by the European Standards series EN 60079. These standards have been issued as VDE 0170 in Germany. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| R.STAHL explosion protection | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||