Basics of Explosion Protection Types of Protection for Electrical Apparatus in Hazardous Areas

Types of Protection In areas where explosive atmospheres can occur despite theexplosion protection measures employed, only explosion- protected electrical equipment may be used. Explosion protected electrical equipment can be manufactured to IEC protection type industrial levels. Types of protection for electrical apparatus in hazardous areas Type of protection Diagram Main application Standard increased safety e professional terminal and junction boxes, industrial control boxes for installing Ex-components (with different type of protection), squirrel-cage motors, professional light industrial fittings EN 60 079-7 IEC 60 079-7 UL 60 079-7 FM 3600
11098E00 flameproof enclosure d switchgear and control station and indicating equipment, control systems, motors, industrial transformers, heating equipment, light fittings EN 60 079-1IEC 60 079-1 UL 60 079-1 FM 3600
11099E00 pressurized apparatus p switchgear and control professional cabinets, analysers, large motorspx = for use in Zone 1, 2py = for use in Zone 1, 2pz = for use in Zone 2 EN 60 079-2 IEC 60 079-2 NFPA 496 FM 3620
11100E00 intrinsic safety i industrial instrumentation technology, field bus technology, detection, actuatorsia = for use in Zone 0, 1, 2ib = for use in Zone 1, 2[Ex ib] = associated electrical apparatus - installation in the safe area EN 60 079-11IEC 60 079-11 UL 60 079-11 FM 3610
11101E00 intrinsically safe systems EN 60 079-25 IEC 60 079-25 FISCO Ex ia IIC T4FNICO Ex ia IIC T4 fieldbus intrinsically-safe concept (FISCO) for Zone 1 fieldbus non-incentive concept (FNICO) for Zone 2 EN 60 079-27 IEC 60 079-27 professional oil immersion o transformers, starting resistors EN 60 079-6IEC 60 079-6 UL 60 079-6 FM 3600
11102E00 professional powder filling q transformers, condensors, terminal chassis for heating conductors EN 60 079-5 IEC 60 079-5 UL 60 079-5 FM 3600
11103E00 encapsulation m switchgear with small capacity, control and signalling units, professional display units, sensors ma = for use in Zone 0, 1, 2mb = for use in Zone 1, 2 EN 60 079-18IEC 60 079-18 UL 60 079-18 FM 3600
11104E00 type of protection n_ all electrical apparatus for Zone 2nA = non-sparking apparatusnC = sparking apparatus, in which the contacts are protected in a suitable waynL = energy limited apparatusnR = restricted breathing apparatusnZ = apparatus with n-pressurization EN 60 079-15IEC 60 079-15 UL 60 079-15 FM 3600
11105E00 optical radiation op_ op is = inherently safe optical radiationop pr = protected optical radiationop sh = optical radiation interlock EN 60 079-28IEC 60 079-28
11106E00

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General Catalogue 13.02.2006