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Text version of the page
| 19 | ||||||||||
| Types of Protection | ||||||||||
| Only explosion protected equipment may be used in areas in which an explosive atmosphere may still be expected despite the implementation of prevention measures. Electrical, explosion protected equipment can have various types of protection according to the construction regulations of the standards series EN 60079, former EN 50014 and following. If electrical equipment shall be used in areas with combustible dust, the standards series EN 61241 is applicable. The type of protection employed by the manufacturer depends mainly on the kind and function of the apparatus. Various safety levels exist for some types of protection. These correspond to the equipment categories as defined in the 94/9/EC Directive. The Ex ia version relative to intrinsic safety can be classified as category 1. It can be installed in Zone 0. The Ex ib version corresponds to category 2 which suits Zone 1. From a safety point of view, all standardized types of protection should be seen as being equal. The tables 10-13 give an overview of the standardized types of protection, and describes the basic principle, as well as the usual applications. | ||||||||||
| R.STAHL explosion protection | ||||||||||