0158
II 2 GD
Gas
0102Physikalisch-Technische Bundesanstalt PTB, Germany 0158DEKRA EXAM GmbH, Germany
Category
G as ( G )
Staub (D)
Group II Explosive atmospheres (other than mines)
Group I
E PL
I EC St Sta nd ar ds
Mines susceptible b le to firedamp
Ty pe of pr ote ct o i n
60079-0
General requirements
6 00 00 79 79 -1 -1
0032TÜV CERT GmbH, Germany 0637I BExU, Institut für Sicherheits technik, Germany
Ga
da
E qu qu ip me me nt nt p ro te te ct ct io n by f al me me pr pr oo oo f en en cl cl os os ur ur es es «d «d »
6 00 00 79 79 -1 -1 1
ia
E qu qu ip me me nt nt pr pr ot ot ec ec titi on on by in trtr in sisi c s af af e ty «i«i »
6 00 00 79 79 -1 -1 8
ma
E qu qu ip me me nt nt p ro te te ct ct io n by e nc ap ap su su la titi on on «m «m »
0344Dekra Certification B.V., Netherlands
6 00 00 79 79 -2 -2 6 60079- 28
0081LCIE Laboratoire Central des Industries Electriques, France
6007979-1 1
0080I NERIS, France
60079-2
0600EECS Electrical Equipment Certifi cation Service, Great Britain
6 00 79 -5 -5
q
E qu p i me nt nt p ro te te ct ct o i n by p ow de r fi l n i g «q »
6 00 00 79 79 -6 -6
ob
E qu qu ip me me nt nt pr ot ot ec ec titi on on by il qu qu id m i me me rs rs io n « o» o»
6 00 79 -7 -7
e
E qu p i me nt nt p ro te te ct ct o i n by i nc re re as as ed s af et et y «e »
6 00 00 79 79 -1 -1 1
ib
E qu qu ip me me nt nt pr pr ot ot ec ec titi on on by by in trtr in sisi c s af af e ty «i «i »
6 00 00 79 79 -1 -1 8
mb
E qu qu ip me me nt nt p ro te te ct ct io n by e nc ap ap su su la titi on on «m «m »
0518SCS Sira Certification Services, Great Britain
Gb
0163LOM, Spain 0470NEMKO, Norway 0539Ul International DEMKO, Denmark
6 00 00 79 79 -1 -1 6 00 00 79 79 -2 -2
1258Electrosuisse SEV, Switzerland Listenotcomplete
Categories (Directive 94/9/EC Annex I)
Category 1 comprises equipment designed to be capable of functioning ng in conformity with the operational parameters established by the manufacturer and ensuring a very high level of protection. Equipment in this category is intended for use in areas in which explosive atmospheres caused by mixtures of air and gases, vapours or mist or by air/dust mixtures are present continuously, for long periods or frequently. Equipment in this category must ensure the requisite level of protection, even in the event of rare incidents relating to equipment, and is characterized by means of protection such that: – either, in the event of failure of one means of protection, ection, at least an independent second means provides the requisite level of protection, – or the requisite level of protection is assured ed in the event of two faultsoccuring independently of each other.
Category Categ ory 2
op si d, db
Category 2 comprises equipment designed to be capable of functioning in conformity by the manufacturer and of ensuring a with the operational parameters p arameters established by the high level of protection. Equipment in this catego ry is intended for use in ar eas in which explosive atmospheres caused by gases, vapours, mists or air/dust mixtures are likely to occur.
Gc
oc
E qu qu ip me me nt nt pr ot ot ec ec titi on on by il qu qu id m i me me rs rs io n « o» o»
ic
E qu qu ip me me nt nt pr pr ot ot ec ec titi on on by in trtr in sisi c s af af e ty «i«i »
6 00 00 79 79 -1 -1 8 6 00 00 79 79 -1 -1 5
mc nA
6 00 00 79 79 -1 -1 5 60079-28
E qu qu ip me me nt nt p ro te te ct ct io n by e nc ap ap su su la titi on on «m «m » E qu qu ip me me nt nt p ro te te ct ct io n by t yp e of of p ro te te ct ct io n «n » – «non sparking» nR E qu qu ip me me nt nt p ro te te ct ct io n by t yp e of of p ro te te ct ct io n «n » – «restricted breathing» nL E qu qu ip me me nt nt p ro te te ct ct io n by t yp e of of p ro te te ct ct io n «n » – «limited energy» nC E qu qu ip me me nt nt p ro te te ct ct io n by t yp e of of p ro te te ct ct io n «n » – enclosed-break device op is, op pr, Protection of equipment and transmission systems using op sh optical radiation
Equipment groups (Gas)
Category 3
IIA Aceton, ethane, Benzene, petrol, butane, propane, methane IIB Ethylene, e ne, town gas
Category 3 comprises equipment designed to be functioning in conformity with the operational parameters established by the manufacturer and ensuring normal level of protection. Equipment in this category is intended for use in areas in which explosive atmospheres caused by gases, vapours, mists, or air/dust mixtures are unlikely to occur or, if they do so only infrequently and for a short period only.
Classification i on of areas –Combustible b le dust atmospheres
60079-14
Electrical r ical installati a llations o ns design, g n, selection and erection on
a) by suitable selection of the material to keep the surface resistance of the enclosure from exceeding 1 GΩ (tested according IEC 60079-0, part 26.13)
60079-17
Electrical r ical installati a llations o ns inspection and maintenance e nance
60079-19
Equipment repai repair, r , overh overhaul and and reclamatio a mation
IIC Hydrogen, acetylene
Temperature class
T1 T2 T3 T4 T5 T6
Ignition temperature ofgasor vapour
Maximumadmissible surfacetemperature forpermanentlyhot surfaces
> 450 ° C > 300 ° C > 200 ° C > 135 ° C > 100 ° C > 85 ° C
440 °C 290 °C 195 °C 130 °C 95 °C 80 °C
Zone
Zone 0
A place in which ch an explosive atmosphere consisting of a mixture with air of flammable substances in the form of gas or vapour is present continuously or for long periods or fre quently. A place in which ch an explosive atmosphere consisting of a mixture with air of flammable substances in the form of gas or vapour is likely to occur in normal operation occasionally
Zone 1
A place in which ch an explosive atmosphere consisting of a mixture with air of flammable substances in the form of gas or vapour is not likely to occur in normal operation, but if it does occur, will persist for a short period only (usually no longer than 2 hours).
Opencontainer
extraction 1m
1m
Dust
Gb and Ga
2
G c, Gb Gb an and Ga Ga
IEC
NEC 505
Zone 0 / 20
Zone 0 / 20
Zone 0 / 20
Zone 1 / 21
Zone 1 / 21
Zone 1 / 21
Zone 2 / 22
Zone 2 / 22
Zone 2 / 22
Class
Division Di
Group
Class I
Division s ion 1 In which ignitible i ble concentrations i ons of such flammable gases, flammable liquid-produced vapors, or combustible liquid-produced vapors can exist under normal operating conditions. Division 2 In which volatile flammable gases, flammable liquidproduced vapors, or c ombustible liquid-produced vapors are handled, processed, or used, but in which the liquids, vapors, or gases will normally be confined within closed containers or closed systems from which they can escape only in case of accidental rupture or breakdown of such containers or systems or in case of abnormal operation of equipment.
GroupA GroupB GroupC GroupD
Class II Division s ion 1 In which combustible dust is in the air under normal operating conditions in quantities sufficient to produce explosive or ignitible mixtures.
Division2
In which easily ignitible ible fibers/flyings are handled, manufactured, or used. In which easily ignitible fibers/flyings are stored or handled other than in the process of manufacture.
Da
Fibres
Genera l re require me nts
6 00 00 79 79 -1 -1 1
ia
6 00 00 79 79 -1 -1 8
ma
E qu qu ip me me nt nt pr ot ot ec ec titi on on by e nc nc a ps ul ul at at io n « m» m»
6 00 00 79 79 -3 -3 1
ta
E qu qu ip me me nt nt d us t gi ni ni titi on on pr pr ot ot ec ec titi on on by by e nc lo su su re re « t»
60079-2
Dc Group E Metal Dust GroupF Coal Dust GroupG Grain Dust
Db
Division 2 In which combustible dust due to abnormal operations may be present in the air in quantities sufficient to produce explosive or ignitible mixtures. Class III Division1
Acetylene Hydrogen o gen Ethylene Propane
Electrical equipment for use in areas with combustible dust (Equipment group III)
60079-0
ib
6 00 00 79 79 -1 -1 8 6 00 00 79 79 -3 -3 1 6 00 00 79 79 -2 -2
p zc zc
10000 10000
2000
Gc
10000 10000
2000
EP L
I IA
I IB
I IC
1G
Ga
La ye r t hic k ne ss [mm]
2
2
0.2
2G
Gb
2
2
0.2
3G
Gc
2
2
0.2
Table 2: Maximum admissible layer
thicknesses C at at eg eg or or y
E PL PL
W id th th o r d i am et er er [mm] I IA
II B
IIC
1G
Ga
3
3
1
2G
Gb
30
30
20
3G
Gc
30
30
20
Dust (extract IEC 60079-0)
Electrostatic charging of enclosures or enclosure parts of plastics must be limited. Equipment must be designed so that, under normal operating conditions, the danger of ignition as a result of brush discharges will be avoided.
1m
Zone20
Zone22
extraction
NEC 500 IEC 60079-0 (does not apply to mines)
Divison 1 0,7 m* Division 2
Examples – Transmitter power supply – Disconnect amplifiers – Zener barriers
(0.4 m* marked with the symbol 'X') – guards, protective covers, ventilator hoods, cable entries
E N 1 34 34 63 63 -1 -1 EN 13463-2
fr
Protec tectio tion by flow flow res restri tricti c ting n g enclo closur sure
E qu qu ip me me nt nt p ro te te ct ct io n by by p re ss ss ur ur iz ed ed e nc lo su su re re « p»
EN 13463-3
d
Protec tectio tion by by flam l ameproof o of enc enclos losure
EN 13463-5
c
Protec tectio tion by by cons constructional o nal safety
EN 13463-6
b
Protec tectio tion by cont control r ol of ignition i on source ce
EN 13463-7
p
Protec tectio tion by pr press essuri urized z ed enc enclos losure
EN 13463-8
k
Protec tectio tion by liquid immers ersion ion
E qu qu ip me me nt nt p ro ro te te ct ct io n b y i nt nt riri ns ns ic sa f et y « i» E qu qu ip me me nt nt pr ot ot ec ec titi on on by e nc nc a ps ul ul at at io n « m» m»
6 00 00 79 79 -3 -3 1
tc
E qu qu ip me me nt nt d us t gi ni ni titi on on pr pr ot ot ec ec titi on on by by e nc lo su su re re « t» Surface temperature max.
C od od e
– Light-transmitting parts without guards (sight glasses, displays, operator panels, monitor screens, protective covers)
– Light-transmitting parts with guards (sight glasses, displays, operator panels, monitor screens, protective covers)
Ty pe pe o f pr pr ot ec ec ti on
IP Degree of Protection
B as as ic me me th th od od an an d r eq eq ui ui re re me me nt nt s
Ex tb IIIC T95°C Db Ex tb IIIC T95°C Equipment Protection Level (EPL)
(0.1 m* marked with the symbol 'X')
Non-electrical equipment for use in potentially explosive atmospheres E ur op e
ic
0,2 m*
The test must be carried out at an ambient temperature of (20±5) °C, except where the material data indicate a reduction of the impact strength at lower temperatures within the prescribed ambient temperature range. In this case the test must be carried out between 5 K and 10 K below the lowest temperature of the prescribed range.
E qu qu ip me me nt nt pr ot ot ec ec titi on on by e nc nc a ps ul ul at at io n « m» m»
mc
(0.2 m* marked with the symbol 'X')
Guard having individual openings from 625 mm 2 to 2500 mm 2 (tested without guard).
E qu qu ip me me nt nt d us t g i ni ni titi on on p ro te te ct ct io n by e nc lo su su re re « t»
6 00 00 79 79 -1 -1 8
0,4 m*
* drop height h with a mass of 1 kg
tb
Zone
Gb
3G
must not be installed in potentially explosive atmospheres (no temperature class!)
mb
Equipment groups (Dust)
2G
Ca te gory
– Layer thickness of external insulation on metal parts ≥ 8 mm. (External plastic layers of 8 mm or more on metal parts such as measurement probes or the like make propagating brush discharges unlikely to occur. Expected wear under normal usage should be taken into account in assessing the minimum layer thickness of the insulation.)
1m
Associated apparatus
E qu qu ip me me nt nt p ro ro te te ct ct io n b y i nt nt riri ns ns ic sa f et y « i»
6 00 00 79 79 -1 -1 1
IIIA fibres
400
– Breakdown voltage ≤ 4 kV (measured through the thickness of the insulating material with the method described in IEC 60243-1)
E qu qu ip me me nt nt p ro ro te te ct ct io n b y i nt nt riri ns ns ic sa f et y « i»
pxb, pyb Equipment prot protection e ction by by press pressuri urized z ed enclo closur sure «p»
6 00 00 79 79 -1 -1 1
2500
– enclosures (metal or plastic, e.g. terminal boxes, control boxes, membrane keyboards)
Ty pe o f p ro te ctio n
5000
Resistance to impact Directive 1999/92/EC
Dust
I EC S ta nd ar ds
IIC
Ga
– Surface resistance < 10 9 Ohm (resistance to electrostatic discharge to earth through an insulating material or along its surface; tested according IEC 60079-0, part 26.13)
Zone 21 Area in which ch an explosive atmosphere ni the form of a cloud of combustible dust in air is likely to occur, occasionally, in normal operation.
Ga
1
I IB
1G
This can be achieved by using plastics that have at least one of the following characteristics:
Zone 20 Area in which ch an explosive atmosphere ni the form of a cloud of combustible dust in air is present continuously or for long periods or frequently.
Classifications of Locations (NEC 500.5)
E PL
Classification of areas Filling(e.g. fillingopenings) and emptying(e.g. baggingstations) withoutdeposits
Zone 22 Area in which ch an explosive atmosphere ni the form of a cloud of combustible dust in air is not likely to occur in normal operation, but if it does occur, will persist for a short period only.
Equipment Protection Level (EPL)
0
Zone1
S ur fa fa ce ce s [m [m m2] IIA
Table 3: Maximum admissible width or diameter of long insulating parts
1m
Zone0
E PL PL
Table 1: Limitation of the he surfaces
Classification on of areas Filling(e.g. fillingstation, transferby pumping) Mixinginstallation(e.g. stirring,mixing)
Locations shall be classified depending on the properties of the flammable gas, flammable liquid-produced vapor, combustible-liquid produced vapors, combustible dusts, or fibers/flyings that may be present, and the likelihood that a flammable or combustible concentration or quantity is present. Each room, section, or area shall be considered individually in determining its classification.
b) by limitation of the surface area of enclosures and enclosure parts of plastics ics (projected in any direction), the layer thickness of plastic sheets, and the width or diameter of long insulating parts.
C at eg or or y
5m
Ex db e IIC T5 Gb
The means of protection relating to equipment in this category ensure the requisite The level of protection, even in the e vent of frequently occuring disturbances or equipment faults which w hich normally have to be taken into account.
The requirements regarding electrostatic charges must be met with one of the following measures:
60079-10-2
Zone 2
I nt nt riri ns ci al al yl s af af e e el ct ct ri ca ca l s ys te ms ms op is, op pr, Protection of equipment and transmission systems using op sh optical radiation dc E qu qu ip me me nt nt p ro te te ct ct io n by f al me me pr pr oo oo f en en cl cl os os ur ur es es «d «d » pz E qu qu ip me me nt nt p ro te te ct ct io n by p re ss ss ur ur iz ed ed e nc lo su su re re « p»
6 00 00 79 79 -1 -1 1
6 00 00 79 79 -1 -1 5
Classification i on of areas –Explosive gas atmospheres
Gas
E qu qu ip me me nt nt wi th th eq ui ui pm pm en en t p ro ro te te ct ct io n l ev ev el el (E PL PL ) G a Protection of equipment and transmission systems using optical radiation Equipment protec tectio tion by flamepr l ameproof o of enc enclos losure uress «d»
6 00 00 79 79 -6 -6
6 00 00 79 79 -1 -1 5
60079-10-1
p, pxb, pyb Equipment p ment protection by pressur e ssurized i zed enclosure «p»
6 00 79 -2 -2 5 60079-28
0434Det Norske Veritas AS, Norway
Category 1
Gas (extract IEC 60079-0)
IEC Standards Electrical apparatus for explosive gas atmospheres (Equipment group II [chemicals])
Number of the notified body (responsiblefor quality assurance) ance)
Electrostatic Electrostati c Charges
Zone Classification, Installation, Inspection, Maintenance, Repair and Overhaul
Marking to Standard IEC 60079-0
Marking to Directive 94/9/EC (ATEX 95)
IEC60529 Degrees of protection provided by enclosures (IP-Code)
www.atex95.com www.atex137.com EditionNovember 2014 thubaLtd.
CH-4015Basel
First numeral (against penetration of solid foreign objects / prevention of access to hazardous parts)
Second numeral (against penetration of water with harmful effects)
0
not protected
not prote cted
1
≥
50.0 mm diameter / back of hand
2
≥
12.5 mm diameter / finger
3
≥ 2.5 mm diameter / tool
4
≥
5
dust-protec ted / wire
water jets
6
dust-tight / wire
powerful water je ts
1.0 mm diameter / wire
vertically falling water drops water drops (enclosure tilted 15°) spraying water spla shing wa ter
7
temporary immersion in water
8
continuous immersion in water
