Electrical equipment in an explosive atmosphere requires a higher degree of protection compared to normal electrical equipment in non-hazardous areas. There are several approaches when designing electrical equipment for hazardous areas, and they are categorized by the so-called»Ex« protection techniques. The purpose of »Ex« equipment is the prevention of ignition, endurance of equipmentduring an outside explosion, or limitation of explosion inside equipment.
Standard IEC 60079 defines technical requirements for »Ex« protection techniques and their installation in hazardous areas – zones.
The objective of this thesis is to present »Ex« protection techniques for electrical equipment in an explosive atmosphere, to establish which ones are used most often, and to outline the approach in designing electrical installations in hazardous areas.
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