Marking of electrical explosion protected equipment …

1 Marking of electrical explosion protected equipment (ATEX/ iecex )Use of the operating equipmentMarkingConditionswithout X or UEquipment can be operated without restrictionswith XSpecific conditions of use of the equipmentwith UComponent certificate (uncomple-ted), conformity is certified when used in an overall equipmentProtection principle/types of protectionApplicationsFlammable materialsProtection principleType of protectionMarking in accordance with the equipment protection levelStandardsvery high level of protectionhigh level of protectionenhanced level of protectionAll applicationsGases, vapours (G) and dusts (D) General requirements+++EN IEC 60079-0 Control stations, motors, fuses, switchgear, power electronics, *catalytic gas detectors onlyGases and vapours (G) Propagation of an explosion inside to the outside is excludedFlameproof enclosureEx da*Ex dbEx dcEN IEC 60079-1 Junction and connection boxes, enclosures, motors, luminaires, terminalsGases and vapours (G) Avoidance of arcs, sparks and ex-cessive temperatureIncreased safety Ex ebEx ecEN IEC 60079-7 Junction and connection boxes, enclosures, motors, luminaires, switch and control cabinets, plugsDusts (D) Explosive dust atmosphere keep at a distance from the ignition sourceProtection by enclosureEx taEx tbEx tcEN IEC 60079-31 Measurement and control technology, automation technology, sensors, actuatorsGases, vapours (G) and dusts (D)

2 Limitation of energy as well as arcs and temperatureIntrinsic safetyEx iaEx ibEx icEN IEC 60079-11 EN IEC 60079-25 Switch and control stations, motors, analyzers, computersGases, vapours (G) and dusts (D)Explosive atmosphere keep at a distance from the ignition source Pressurization Ex pxb, Ex pybEx pzcEN IEC 60079-2 Coils of motors or relays, solenoid valves, connection systemsGases, vapours (G) and dusts (D)Explosive atmosphere keep at a distance from the ignition source EncapsulationEx maEx mbEx mcEN IEC 60079-18 Transformers, relays, control stations, magnetic contactorsGases and vapours (G) Explosive atmosphere keep at a distance from the ignition source Liquid immersion Ex obEx ocEN IEC 60079-6 Capacitors, transformers, relaysGases and vapours (G) A propagation of an explosion inside to the outside is excludedPowder filling Ex q+EN IEC 60079-5 Applications for zone 2 Gases and vapours (G) Protection principles adapted for zone 2 Enclosed constructionRestricted breathing Ex nCEx nREN IEC 60079-15 Optical devices, laser scanners, light barriers, fibre-optic systemsGases, vapours (G) and dusts (D)Limitation of optical energy radiating in the explosive atmosphereInherent safe optical radiation Ex op is++EN IEC 60079-28 Fibre-optic systemsGases, vapours (G) and dusts (D)Ex atmosphere is kept distant from the ignition source protected optical radiation Ex op pr+EN IEC 60079-28 Fibre-optic systemsGases, vapours (G) and dusts (D)

3 Ex atmosphere is kept distant from the ignition source Optical system with interlocking Ex op sh+EN IEC 60079-28 Potentially explosive areasConditions and Zone classificationRequired Marking on the equipment Flammable materialsTemporary behaviour of explosive atmosphereClassi- fication of hazardous areasGroup as defined indirective2014/34/EUEquipment category as defined in directive2014/34/EUEquipment group as defined inEN IEC 60079-0 equipment protection level (EPL) as defined in EN IEC 60079-0 Gases Vapoursis present continuously or for long periods or frequentlyZone 0II1 GIIGa arises in normal operation occasionallyZone 1II2G or 1 GIIGb or Gais not likely to arise in normal operation, or if it does, will persist for a short time onlyZone 2II3G or 2G or 1 GIIGc or Gb or GaDustsis present in the form of a cloud continuously, or for long periods or frequentlyZone 20 II1 DIIID aoccasionally develops into a cloud during normal operation Zone 21II2D or 1 DIIIDb or Dais not likely to develop into a cloud during normal operation, or if it does.

4 For a short time onlyZone 22II3D or 2D or 1 DIIIDc or Db or DaMethaneCarbon dustoperation where there is a risk of explosion -IM1 IMadisconnection where there is a risk of explosion -IM2 or M1 IMb or MaApplication area ( equipment ) depending on either G or DZone 0/20 Zone 1/21 Zone 2/22 Zone 1/21 Zone 2/22 Zone 2/22 ATEXG ases/VapoursNB1)II2 GEx db ebIICT6 GbNB2) 18 ATEX 1234 XDustsNB1)II2 DEx tbIIICT80 CDbNB2) 18 ATEX 1234 XIECExGases/VapoursEx db ebIIBT4 GbIECEx ExCB3) tcIIIBT120 CDcIECEx ExCB3) and classification of gases and vapoursGases and vapoursAssignment of gases and vapours accordance to the ignition temperatureTemperatureclassMaximum surface temperature ( equipment )Permitted Temperatureclasses( equipment )Ammonia, methane, ethane, propaneTown gas, acrylnitrilHydrogen> 450 CT1450 CT1 to T6 n-butaneEthylene, ethylene oxide, Ethyl alcoholEthine (Acetylene) > 300 C.

5 < 450 CT2300 CT2 to T6 Gasoline, n-hexane, cyclohexanehydrogen sulphide> 200 C .. < 300 C T3200 CT3 to T6 AcetaldehydeEthyl ether > 135 C .. < 200 CT4135 CT4 to T6> 100 C .. < 135 CT5100 CT5 to T6carbon disulphide> 085 C .. < 100 CT6 85 CT6 GroupsIIAIIBIICP ermitted equipment groupsIIA, IIB, IICIIB, IIC IICMax. permissible surface temperature of the equipmentTemperature limitation because of dust layerT5 mm: Minimum ignition temperature of 5 mm layer of dustTmax. < T5 mm - 75 CTemperature limitation because of dust cloudTCL: Minimum ignition temperature of the cloud of dustTmax. < 2/3 TCLMax. permissible surface temperature of the equipment :lowest outcome of the Tmax. valuesSubdivision of dustsPermitted equipment groupsGroupsDustsIIIA, IIIB, IIIC IIIA combustible flyingsIIIB, IIICIIIBnon-conductiveIIICIIIC conductive- means: Not possible to use.

6 + means: Possible to ) Identification number of the Notified Body responsible for the surveillance of the manufacturer s quality system (Cat. 1 and 2). 2 ) Notified Body (NB) that has tested and certified the product (Cat. 1 and 2).3) Certification Body (CB) that has tested and certified the product (EPL a, b and c).ATEX is in the European Union a mandatory and iecex a voluntary certification procedure. For the correct application of the certification procedures, please follow the corresponding regulations guidelines and standards.