High Performance

LED Luminaires
for hazardous areas

II 2G Ex d IIB T5 GbM
II 2D Ex tb IIIC 950C Max Db IP 66

Guide to Explosion Proof Lighting

LIGHTING & THEIR BENEFITS FOR USE IN HAZARDOUS ENVIRONMENT

Hazardous locations required intrinsically safe lights that can work in the presensce of dust and flammable petrochemicals in industrial environment where ignitable flammable gases are present.The main purpose of these lights is to stop an explosion from escaping, whenever one occurs.Confined areas provide a perfect environment for hazardous vapours and gases to accummulate.These Lights are Atex/IECEx/UL Certified and meets hazardous areas classification requirements.LED explosion proof lights have many benefits over conventional explosion proof lights.These fixtures have an average life expectancy of 50,000+ hours.While conventional metal halides/sodium vapour lamps have an average life span of 12,000 and 20,000 hours.LED explsoion proof fixtures maintain their lumens extremely well.Their Lumen maintenance (L70) is typically over 50,000+ hours.During that period we normally replace 2 to 3 HID Lamps.Explosion proof LED Lights are more energy efficient than traditional explosion proof lights.Longer life span of LEDs contributes to lower operating and maintenance costs.

UNDERSTANDING CLASSES,DIVISIONS & ZONES FOR HAZARDOUS AREA LIGHTING

Hazardous workplace conditions can vary differently which means a comprehensive rating system becomes necessary in order to ensure a safe work environment.Understanding the way these areas are classified is important in order to correctly choose which type of light is right for a specific workplace.Hazardous and classified locations can be defined as locations where fire or explosion hazards may exist due to the presence of flammable gases or vapors, flammable liquids, combustible dusts and ignitable fibres or flyings.Hazardous locations divided into Classes,Divisions and groups in NEC US Standards.In IEC Zone classification, it is divided into Zones.

Classes

Classes define the general nature of the hazardous material that may be in the sorrounding atmosphere.

Class I

Class I Locations are those in which inflammable gases or vapours are or may be present in sufficient quantities to produce a fire or explosion if ignited.

Class II

Class II Locations are hazardous because of the presence of combustable dust particles that are or may be present in sufficient quantities to produce a fire or explosion if ignited.

Class III

Class III Locations are those that are hazardous because of the presence of easily ignitable fibers of flyings,that are or may be present in sufficient in quantities to produce a fire or explosion if ignited.

Divisions

Divisions define the probability of hazardous material or element being present in sorrounding atmosphere that has the ability to be ignited.

Division 1

 Always present, refers that the substance in the class, it is paired with, has a high probability of producing and ignitable or explsoive mixture due to it being present contineously ,intermittently or periodicaly.The substance may also come from the equipment in the area under normal circumstances.

Division 2

Not normally present, refers that the substance in the class, it is paired with, has a low probability of producing and ignitable or explsoive mixture due to it being present only during abnormal circumstances or for a short period of time,such as a system breakdown or container failure.

Groups

Further grouping of each hazardous working environment is necessary due to the wide range of flammable materials that could be present in different industries.The different groups, and the classes they are associated with, are listed below:

Class 1 : Gases

Group A refers to an area that contains Acetylene

Group B refers to an area that contain flammable gas,liquid produced vapour or combustible liquid-produced vapour mixed with air that has the potential to catch fire and burn or explode.

Group C refers to an area that contain flammable gas,liquid produced vapour or combustible liquid-produced vapour mixed with air that has the potential to catch fire and burn or explode.

Group D refers to an area that contain flammable gas,liquid produced vapour or combustible liquid-produced vapour mixed with air that has the potential to catch fire and burn or explode.

Class 2 : Dusts

Group E refers to an area that contain combustible metal dusts such as aluminium ,magnesium,bronze,chromium,zinc and other commercial alloys.produced vapour mixed

Group F refers to an area that contain dusts with carbon or carbon compounds,carbon black,coal black,charcoal,coal or coke dusts.

Group G refers to an area that contain combustable dusts that are not included in group E and F,such as flour,grain,sugar,wood,starch,chemicals and plastics

IEC Zones Classifications

Hazardous areas classifed in three zones:
Zone 0 refers to gases
Zone 1 refers to vapours
Zone 2 refers to mists

Hazardous areas classifed in three zones:
Zone 20 refers to Dust
Zone 21 refers to fibers
Zone 22 refers to flyings

Zone : Gases

Zone 0

refers to flammable gases or vapours that are present contineously or for long periods of time in ignitable concentrations.

Zone 1

refers to flammable gases or vapours that are present in ignitable concentrations that are likely to occur under normal operating conditions.

Zone 2

refers to flammable gases or vapours that are present in ignitable concentrations & are not likely to occur under normal operating conditions & present for only a short period of time.

Zone : Dusts

Zone 20

refers to flammable dusts,fibers or flyings that are present contineously or for long periods of time in ignitable concentrations.

Zone 21

refers to flammable dusts,fibers or flyings that are present in ignitable concentrations that are likely to occur under normal operating conditions.

Zone 22

refers to flammable dusts,fibers or flyings that are present in ignitable concentrations & not likely to occur under normal operating conditions and presnet for short period of time.

Comparison

Gas or Vapour

Class I, Division 1

Class I, Division 2

Zone 0,1

Zone 2

Dust

Class I, Division 1

Class II, Division 2

Zone 20

Zone 22

Fibers or Flyings

Class III, Division 1

Class III, Division 2

No Equivalent

No Equivalent

Classifications of Divisions and Zones

Contineous hazard

A place in which an explosive atmosphere is contineously present

Division 1

Zone 0 / Zone 20 Cat 1

Intermittent hazard

A place in which an explosive atmosphere is likely to occur in normal operation

Division 2

Zone 1 / Zone 21 Cat 2

Hazard abnormal condition

A place in which an explosive atmosphere is not likely to occur in normal operartion, but may occur for short periods

Division 1

Zone 2 / Zone 22 Cat 3

ATEX

ATEX Categories

EQUIPMENT SUITABLE FOR ZONE 0

EQUIPMENT SUITABLE FOR ZONE 20

EQUIPMENT SUITABLE FOR ZONE 1

EQUIPMENT SUITABLE FOR ZONE 21

EQUIPMENT SUITABLE FOR ZONE 2

EQUIPMENT SUITABLE FOR ZONE 22

ATEX Groups

Group I – is typically reserved for underground applications such as mines.

Group II – is typically reserved for most surface apliocations.

Group III – is related to electrical equipment for use in places with an explosive dust atmosphere than mines.

ATEX Categories

EQUIPMENT SUITABLE FOR ZONE 0

EQUIPMENT SUITABLE FOR ZONE 20

EQUIPMENT SUITABLE FOR ZONE 1

EQUIPMENT SUITABLE FOR ZONE 21

EQUIPMENT SUITABLE FOR ZONE 2

EQUIPMENT SUITABLE FOR ZONE 22

ATEX Groups

Group I – is typically reserved for underground applications such as mines.

Group II – is typically reserved for most surface apliocations.

Group III – is related to electrical equipment for use in places with an explosive dust atmosphere than mines.

Temperature Classification

T-Classrating 
T16300CAmmonia
T15600CHydrogen
T16370CMethane
T14700CPropane
T-Classrating 
T24250CEthylene
T23720CButane
T23050CAcetylene
T-Classrating 
T32590CCyclohexane
T32100CKerosene
T-Classrating 
T41600CDi-ethyl Ether
T-Classrating 
T6950CCarbon Di-sulphide

Applications Areas

Gas Mist Vapor

Dust

Gas Groups

Marking

Gas

Dust Groups

Marking

Gas