Hazardous Location - ATEX Certification Definitions - Extronics Wallchart
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II 2 G Ex d IIC T4 Zoning Definitions Zones Gas Dust A place in which an explosive atmosphere is continually present A place in which an explosive atmosphere is likely to occur in normal operation occasionally A place in which an explosive atmosphere is not likely to occur in normal operation, but if it does only occurs for short periods Definitions IP Code 1st Numerical 2nd Numerical Protection against Solid Bodies Protection against Liquid 0 No protection 0 No protection 1 Objects > 50mm 1 Vertically dripping water 2 Objects > 12mm 2 Drops of liquid (75° to 90°) 3 Objects > 2.5mm 3 Sprayed water 4 Objects > 1mm 4 Splashed water 5 Dust-protected 5 Water jets 6 Dust-tight 6 Heavy seas 7 Effects of immersion 8 Indefinite immersion Categories ATEX Cat. 1G Equip. suitable for zone 0 1D Equip. suitable for zone 20 2G Equip. suitable for zone 1 2D Equip. suitable for zone 21 3G Equip. suitable for zone 2 3D Equip. suitable for zone 22 Typical Zone Suitability Dusts Zone 20 Requires 1D equipment IP6X 21 Requires 1D or 2D equipment IP6X 22 Requires 3D, 2D or 1D equipment IP5X* * Must be IP6X if dust is electrically conductive ATEX Category IP Rating Types of Protection Temperature GAS Type of Protection General Requirements – EN 60079-0 Intrinsic Safety Ex ia & ib EN 60079-11 Increased Safety Ex e EN 60079-7 Flameproof Ex d EN 60079-1 Pressurisation Ex p EN 60079-2 Powder Filling Ex q EN 60079-5 Encapsulation Ex ma & mb EN 60079-18 Oil Immersion Ex o EN 60079-6 Type n Ex n EN 60079-15 Standard Non-electrical Equipment (concepts) EN 13463-1 Basic methods & requirements EN 13463-2 Flow restricting enclosure fr EN 13463-3 Flame-proof enclosure d EN 13463-5 Constructional safety c EN 13463-6 Control of ignition sources b EN 13463-7 Pressurisation p EN 13463-8 Liquid immersion k Complies with European Directive EC Mark XXXX Notified Body Number Equipment Group Equipment Category Gas Explosion Protection Type of Protection Gas Group* A, B or C *If omitted suitable for all gas groups Temperature Class (T1-T6) Conformity Assessment ‘Quality Modules’ Design Phase EC-Type Examination Internal Control of Production Unit Verification Production Phase Production Quality Assurance Product Quality Assurance Product Verification Conformity to Type Internal Control of Production Unit Verification Module Annex *1 *2 Protective System B III ✔ ✔ ✔ ✔ ✔ A VIII ✔ *4 ✔ *4 ✔ G IX O O O O O O O O D IV Y Y Y E VII Y Y F V Y Y Y C VI Y Y A VIII ✔ ✔ ✔ G IX O O O O O O O O Marking for Gas Hazards T-Class T1 450 T2 300 T3 200 T4 135 T5 100 T6 85 Max surface temp in °C Groups Gas Groups I Electrical equipment intended for use in mines susceptible to firedamp II Electrical equipment intended for use in places with an explosive gas atmosphere other than mines susceptible to firedamp III Electrical equipment intended for use in places with an explosive dust atmosphere other than mines susceptible to firedamp* IIA Propane IIB Ethylene IIC Hydrogen/Acetylene Dust Groups* IIIA Combustible Flyings IIIB Non-conductive Dust IIIC Conductive Dust Type n EN60079-15 Enclosed break device nC Non-incendive component nC Hermetically sealed device nC Sealed device nC Encapsulated device nC Energy limited apparatus & circuits nL Restricted breathing enclosure nR Non sparking nA III 2 D Ex tD A21 IP66 T80°C Complies with European Directive EC Mark XXXX Notified Body Number Equipment Group Equipment Category Dust Explosion Protection Type of Protection Marking for Dust or Flyings and Fibres Hazards Conformity Assessment ‘Quality Modules’ Table * Notes: 1 “Global Approach” OJEC No.L220, 1993 2 ATEX Directive 94/9/EC 3 Suffix (E) refers to electrical equipment and internal combustion engines Suffix (N) refers to non-electrical equipment 4 Technical Files to be deposited with a notified body KEY ✔ = mandatory unless Unit Verification is used O = optional as an alternative to other modules Y = one of two production phase modules for the equipment category to be chosen by the manufacturer Equipment Category *3 M1 M2 M2 1 2 2 3 (E) (N) (E) (N) EN 60079-10 EN 61241-10 0 20 1 21 2 22 Equipment Threshold power Thermal Initiation Time for (W) (averaging period) (μs) The information in this wall chart is for guidance only. For detailed information see relevant Directives and Regulations. START Is area zoned? Zone 1? Is equipment Ex d concept? Is equipment Ex i concept? Use non-certified cable glands *refer to note 1 Refer to Ex d cable selector chart Gland type Ex e concept Ex n* or N concept Zone 2 Use non-certified cable glands *refer to note 2 Use certified cable glands Brass Yes Yes No Yes Yes No Yes No No Yes No Yes No No No Plastic Use a suitable flameproof cable gland with a sealing ring. (Gland with elastomeric seals) Is the area of installation of Zone 1? Is the volume of enclosure greater than 2 dm3? Use a barrier gland Does the hazardous gas require IIC apparatus? Yes Ex e concept *refer to note 3 Does this enclosure contain an internal source of ignition? Extronics Ltd · Meridian House · Roe Street · Congleton · Cheshire · CW12 1PG · Tel: +44 (0)1260 292651 · Fax: +44 (0)1260 297280 · www.extronics.com · [email protected] Extronics Products • Explosion Proof & Pressurised Solutions • Engineered Solutions, Bespoke Certification and Development • Training & Certification Services Cable Gland Selection Note 1: Non certified cable glands may be used provided that they maintain the minimum IP rating on the certified equipment of IP54 for outdoors and IP20 for indoor equipment. Note 2: Non certified cable glands may be used provided they meet the requirements of EN60079-0 and EN60079-7 or EN60079-15. Note 3: Internal sources of ignition include sparks or equipment temperatures occurring in normal operation which can cause ignition. An enclosure containing terminals only or an indirect entry enclosure is considered not to constitute an internal source of ignition. Radio Frequency Sources The threshold power of radio frequency (10 kHz to 300 GHz) for continuous transmissions and for pulsed transmissions whose pulse durations exceed the thermal initiation time shall not exceed the values shown in Table 4. Programmable or software control intended for setting by the user shall not be permitted. For pulsed radar and other transmissions where the pulses are short compared with the thermal initiation time, the threshold energy values Z th shall not exceed those given in Table 5. ATEX Certification Definitions Table 4 from IEC 60079-0 Radio Frequency Power Thresholds Group I 6.0 200 Group IIA 6.0 100 Group IIB 3.5 80 Group IIC 2.0 20 Group III 6.0 200 Equipment Threshold Energy Z th for (μJ) Table 5 from IEC 60079-0 Radio-frequency Energy Thresholds Group I 1500 Group IIA 950 Group IIB 250 Group IIC 50 Group III 1500 © Extronics Ltd 2008 07/08 DUST Type of Protection General Requirements – EN 61241-0:2006 Protection by Enclosures tD EN 61241-1:2004 Protection pD EN 61241-4:2006 Intrinsic Safety iD EN 61241-11:2006 Encapsulation mD EN 61241-18:2004 Standard ATEX Code ATEX Code Ingress protection and max. surface temperature *Taken from the new IEC60079-0 2007 Other Useful Standards US Enclosure Ratings NEMA 7 to 10 Hazardous Area Enclosures Simple Apparatus Assessment of inadvertent ignition of flammable atmospheres by radio frequency radiation (guide) Explosive atmospheres - Explosion prevention and protection. Part 1, Basic concepts & methodology for surface industry Explosive atmospheres - Explosion prevention and protection. Part 2, Basic concepts & methodology for mining Classification of hazardous areas Electrical installations in hazardous areas (other than mines) Electrical installations inspection and maintenance Equipment repair, overhaul and reclamation Protection of equipment and transmission systems using optical radiation BS6656 EN1127-1 EN1127-2 EN60079-10 EN60079-14 EN60079-17 EN60079-19 EN60079-28 NEMA, UL & CSA type rating Approximate IEC/IP classification Abbreviated Protection Description 1 IP20 2 IP22 3 IP55 3R IP24 4 IP66 4X IP66 6 IP67 Indoor, from contact with contents Indoor, limited, falling dirt and water Outdoor, from rain, sleet, windblown dust & ice damage Outdoor, from rain, sleet & ice damage Indoor & outdoor, from windblown dust, rain, splashing & hose directed water & ice damage Indoor & outdoor, from corrosion, windblown dust, rain, splashing & hose directed water & ice damage Indoor & outdoor, from hose directed water, water entry during submersion & ice damage Mechanical Impacts (UK) Code EN50102 IK Code IK00 IK01 IK02 IK03 IK04 IK05 IK06 IK07 IK08 IK09 IK10 Impact Energy * 0.14 0.2 0.35 0.5 0.7 1 2 5 10 20 (Joules) 5V in Passive components Well defined sources of stored energy considered in safety analysis Sources of generated energy not more than *1.5V, 100mA & 25mW NOT piezoelectric crystal protected components voltage or current enhancement * Note: North America still uses 1.2V and 20 microjoules
description
Hazardous Location - ATEX Certification
Transcript of Hazardous Location - ATEX Certification Definitions - Extronics Wallchart
II 2 G Ex d IIC T4
Zoning Definitions
ZonesGas Dust
A place in which an explosiveatmosphere is continually present
A place in which an explosiveatmosphere is likely to occur in normaloperation occasionally
A place in which an explosive atmosphereis not likely to occur in normal operation,but if it does only occurs for short periods
Definitions
IP Code
1st Numerical 2nd NumericalProtection against Solid Bodies Protection against Liquid
0 No protection 0 No protection1 Objects > 50mm 1 Vertically dripping water2 Objects > 12mm 2 Drops of liquid (75° to 90°)3 Objects > 2.5mm 3 Sprayed water4 Objects > 1mm 4 Splashed water5 Dust-protected 5 Water jets6 Dust-tight 6 Heavy seas
7 Effects of immersion8 Indefinite immersion
Categories
ATEX Cat.
1G Equip. suitable for zone 01D Equip. suitable for zone 20
2G Equip. suitable for zone 12D Equip. suitable for zone 21
3G Equip. suitable for zone 23D Equip. suitable for zone 22
Typical ZoneSuitability
Dusts
Zone
20 Requires 1D equipment IP6X
21 Requires 1D or 2D equipment IP6X
22 Requires 3D, 2D or 1D equipment IP5X*
* Must be IP6X if dust is electrically conductive
ATEX CategoryIP
Rating
Types of Protection
Temperature
GASType of Protection
General Requirements – EN 60079-0
Intrinsic Safety Ex ia & ib EN 60079-11
Increased Safety Ex e EN 60079-7
Flameproof Ex d EN 60079-1
Pressurisation Ex p EN 60079-2
Powder Filling Ex q EN 60079-5
Encapsulation Ex ma &mb EN 60079-18
Oil Immersion Ex o EN 60079-6
Type n Ex n EN 60079-15
Standard
Non-electrical Equipment (concepts)
EN 13463-1 Basic methods & requirements
EN 13463-2 Flow restricting enclosure fr
EN 13463-3 Flame-proof enclosure d
EN 13463-5 Constructional safety c
EN 13463-6 Control of ignition sources b
EN 13463-7 Pressurisation p
EN 13463-8 Liquid immersion k
Complies with European Directive EC Mark
XXXX
Notified BodyNumber
EquipmentGroup
EquipmentCategory
Gas
ExplosionProtection
Type ofProtection Gas Group*
A, B or C*If omitted suitable for all gas groups
TemperatureClass
(T1-T6)
Conformity Assessment ‘Quality Modules’
Design Phase
EC-Type Examination
Internal Control of Production
Unit Verification
Production Phase
Production Quality Assurance
Product Quality Assurance
Product Verification
Conformity to Type
Internal Control of Production
Unit Verification
Module Annex*1 *2
ProtectiveSystem
B III ✔ ✔ ✔ ✔ ✔
A VIII ✔*4 ✔*4 ✔
G IX O O O O O O O O
D IV Y Y Y
E VII Y Y
F V Y Y Y
C VI Y Y
A VIII ✔ ✔ ✔
G IX O O O O O O O O
Marking forGas Hazards
T-Class
T1 450
T2 300
T3 200
T4 135
T5 100
T6 85
Max surfacetemp in °C
Groups
Gas Groups
I Electrical equipment intended for use in mines susceptibleto firedamp
II Electrical equipment intended for use in places with anexplosive gas atmosphere other than mines susceptible tofiredamp
III Electrical equipment intended for use in places with anexplosive dust atmosphere other than mines susceptible tofiredamp*
IIA Propane
IIB Ethylene
IIC Hydrogen/Acetylene
Dust Groups*IIIA Combustible Flyings
IIIB Non-conductive Dust
IIIC Conductive DustType n EN60079-15Enclosed break device nCNon-incendive component nCHermetically sealed device nCSealed device nCEncapsulated device nCEnergy limited apparatus & circuits nLRestricted breathing enclosure nRNon sparking nA
III 2 D Ex tD A21 IP66 T80°CComplies with
European Directive EC Mark
XXXX
Notified BodyNumber
EquipmentGroup
EquipmentCategory
Dust
ExplosionProtection
Type ofProtection
Marking forDust or Flyings
and FibresHazards
Conformity Assessment ‘Quality Modules’ Table
* Notes:1 “Global Approach” OJEC No.L220, 19932 ATEX Directive 94/9/EC3 Suffix (E) refers to electrical equipment and
internal combustion enginesSuffix (N) refers to non-electrical equipment
4 Technical Files to be deposited with a notified body
KEY✔ = mandatory unless Unit Verification is usedO = optional as an alternative to other modulesY = one of two production phase modules for
the equipment category to be chosen by the manufacturer
Equipment Category *3
M1 M2 M2 1 2 2 3(E) (N) (E) (N)
EN 60079-10 EN 61241-10
0 20
1 21
2 22
Equipment Threshold power Thermal Initiation Timefor (W) (averaging period)
(µs)
The information in this wall chart is for guidance only. For detailed information see relevant Directives and Regulations.
START
Is area zoned?
Zone 1?Is equipmentEx d concept?
Is equipmentEx i concept?
Use non-certifiedcable glands*refer to note 1
Refer to Ex dcable selector
chart
Gland type
Ex e concept Ex n* or Nconcept
Zone 2
Use non-certifiedcable glands*refer to note 2
Use certifiedcable glands
Brass
Yes
Yes No
Yes
Yes No
Yes No
No
Yes No
Yes
No No No
Plastic
Use a suitable flameproof cable
gland with a sealing ring.(Gland with elastomeric
seals)
Is the area of installation of
Zone 1?
Is the volume of enclosure
greater than 2 dm3?
Use a barrier gland
Does the hazardous
gas require IIC apparatus?
Yes
Ex e concept
*refer to note 3
Does this enclosure contain an
internal source of ignition?
Extronics Ltd · Meridian House · Roe Street · Congleton · Cheshire · CW12 1PG · Tel: +44 (0)1260 292651 · Fax: +44 (0)1260 297280 · www.extronics.com · [email protected]
Extronics Products • Explosion Proof & Pressurised Solutions • Engineered Solutions, Bespoke Certification and Development • Training & Certification Services
Cable Gland Selection
Note 1: Non certified cable glandsmay be used provided that theymaintain the minimum IP rating onthe certified equipment of IP54 foroutdoors and IP20 for indoorequipment.
Note 2: Non certified cable glandsmay be used provided they meetthe requirements of EN60079-0 andEN60079-7 or EN60079-15.
Note 3: Internal sources of ignitioninclude sparks or equipmenttemperatures occurring in normaloperation which can cause ignition.An enclosure containing terminalsonly or an indirect entry enclosure isconsidered not to constitute aninternal source of ignition.
Radio Frequency SourcesThe threshold power of radio frequency (10 kHz to 300 GHz) for continuous transmissions and for pulsedtransmissions whose pulse durations exceed the thermal initiation time shall not exceed the values shown in Table 4.Programmable or software control intended for setting by the user shall not be permitted.For pulsed radar and other transmissions where the pulses are short compared with the thermal initiation time, thethreshold energy values Zth shall not exceed those given in Table 5.
ATEX Certification Definitions
Table 4 from IEC 60079-0 Radio Frequency Power Thresholds
Group I 6.0 200
Group IIA 6.0 100
Group IIB 3.5 80
Group IIC 2.0 20
Group III 6.0 200
Equipment Threshold Energy Zthfor (µJ)
Table 5 from IEC 60079-0 Radio-frequency Energy Thresholds
Group I 1500
Group IIA 950
Group IIB 250
Group IIC 50
Group III 1500
© Extronics Ltd 2008 07/08
DUSTType of Protection
General Requirements – EN 61241-0:2006
Protection by Enclosures tD EN 61241-1:2004
Protection pD EN 61241-4:2006
Intrinsic Safety iD EN 61241-11:2006
Encapsulation mD EN 61241-18:2004
StandardATEXCode
ATEXCode
Ingress protectionand max. surface
temperature
*Taken from the new IEC60079-0 2007
Other Useful Standards
US Enclosure Ratings NEMA 7 to 10 Hazardous Area Enclosures
Simple Apparatus
Assessment of inadvertent ignition of flammable atmospheresby radio frequency radiation (guide)
Explosive atmospheres - Explosion prevention and protection.Part 1, Basic concepts & methodology for surface industry
Explosive atmospheres - Explosion prevention and protection.Part 2, Basic concepts & methodology for mining
Classification of hazardous areas
Electrical installations in hazardous areas (other than mines)
Electrical installations inspection and maintenance
Equipment repair, overhaul and reclamation
Protection of equipment and transmission systems usingoptical radiation
BS6656
EN1127-1
EN1127-2
EN60079-10
EN60079-14
EN60079-17
EN60079-19
EN60079-28
NEMA, UL& CSA
type rating
ApproximateIEC/IP
classificationAbbreviated Protection Description
1 IP202 IP223 IP553R IP244 IP66
4X IP66
6 IP67
Indoor, from contact with contentsIndoor, limited, falling dirt and waterOutdoor, from rain, sleet, windblown dust & ice damageOutdoor, from rain, sleet & ice damageIndoor & outdoor, from windblown dust, rain, splashing& hose directed water & ice damageIndoor & outdoor, from corrosion, windblown dust, rain,splashing & hose directed water & ice damageIndoor & outdoor, from hose directed water, water entryduring submersion & ice damage
Mechanical Impacts (UK) Code EN50102
IK Code IK00 IK01 IK02 IK03 IK04 IK05 IK06 IK07 IK08 IK09 IK10
ImpactEnergy * 0.14 0.2 0.35 0.5 0.7 1 2 5 10 20(Joules)
5V in
Passive components
Well defined sources of stored energy considered in safety analysis
Sources of generated energy notmore than *1.5V, 100mA & 25mW
NOT piezoelectric crystalprotected componentsvoltage or current enhancement
* Note: North America still uses 1.2V and 20 microjoules
