SIST EN 60079-0:2009
Explosive atmospheres -- Part 0: Equipment - General requirements
Explosive atmospheres -- Part 0: Equipment - General requirements
This part of IEC 60079 specifies the general requirements for construction, testing and marking of electrical equipment and Ex components intended for use in explosive atmospheres. Unless modified by one of the standards supplementing this standard, electrical equipment complying with this standard is intended for use in hazardous areas in which explosive atmospheres exist under normal atmospheric conditions of
temperature –20 °C to +60 °C;
pressure 80 kPa (0,8 bar) to 110 kPa (1,1 bar); and
air with normal oxygen content, typically 21 % v/v.
The application of electrical equipment in atmospheric conditions outside this range requires special consideration and may require additional assessment and testing.
Explosionsfähige Atmosphäre -- Teil 0: Geräte - Allgemeine Anforderungen
Atmosphères explosives -- Partie 0: Matériel - Exigences générales
Eksplozivne atmosfere - 0. del: Oprema - Splošne zahteve (IEC 60079-0:2007)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 60079-0:2009
01-november-2009
1DGRPHãþD
SIST EN 60079-0:2006
Eksplozivne atmosfere - 0. del: Oprema - Splošne zahteve (IEC 60079-0:2007)
Explosive atmospheres -- Part 0: Equipment - General requirements
Explosionsfähige Atmosphäre -- Teil 0: Geräte - Allgemeine Anforderungen
Atmosphères explosives -- Partie 0: Matériel - Exigences générales
Ta slovenski standard je istoveten z: EN 60079-0:2009
ICS:
29.260.20 (OHNWULþQLDSDUDWL]D Electrical apparatus for
HNVSOR]LYQDR]UDþMD explosive atmospheres
SIST EN 60079-0:2009 en,fr
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 60079-0:2009
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SIST EN 60079-0:2009
EUROPEAN STANDARD
EN 60079-0
NORME EUROPÉENNE
August 2009
EUROPÄISCHE NORM
ICS 29.260.20 Supersedes EN 60079-0:2006 and EN 61241-0:2006
English version
Explosive atmospheres -
Part 0: Equipment -
General requirements
(IEC 60079-0:2007)
Atmosphères explosives - Explosionsfähige Atmosphäre -
Partie 0: Matériel - Teil 0: Geräte -
Exigences générales Allgemeine Anforderungen
(CEI 60079-0:2007) (IEC 60079-0:2007)
This European Standard was approved by CENELEC on 2009-06-01. CENELEC members are bound to comply
with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard
the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and notified
to the Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: Avenue Marnix 17, B - 1000 Brussels
© 2009 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60079-0:2009 E
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SIST EN 60079-0:2009
EN 60079-0:2009 - 2 -
Foreword
The text of document 31/708/FDIS, future edition 5 of IEC 60079-0, prepared by IEC TC 31, Equipment
for explosive atmospheres, was submitted to the IEC-CENELEC parallel vote and was approved by
CENELEC as EN 60079-0 on 2009-06-01.
This European Standard supersedes EN 60079-0:2006 and EN 61241-0:2006.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2010-03-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2012-06-01
This European Standard has been prepared under a mandate given to CENELEC by the European
Commission to provide a means of conforming to Essential Requirements of the New Approach Directive
94/9/EC, for electrical equipment of Equipment Groups I and II, Equipment Categories M1, M2, 1G, 2G,
3G, 1D, 2D and 3D. See Annex ZZ.
CENELEC/TC 31 as the responsible committee has concluded that this new edition of EN 60079-0 does
not contain substantial changes regarding the ESRs.
Annexes ZA, ZY and ZZ have been added by CENELEC.
EN 60079-0 will be supplemented by standards EN 60079-X for specific types of protection and by
standards for specific products. In all cases requirements given in these standards result from an ignition
hazard assessment made on the electrical equipment. The ignition sources taken into account are those
found associated with this type of equipment, such as hot surfaces, mechanically generated sparks,
thermite reactions, electrical arcing and static electric discharge.
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SIST EN 60079-0:2009
- 3 - EN 60079-0:2009
Endorsement notice
The text of the International Standard IEC 60079-0:2007 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:
IEC/TS 60034-17 NOTE Harmonized as CLC/TS 60034-17:2004 (not modified).
IEC/TS 60034-25 NOTE Harmonized as CLC/TS 60034-25:2005 (not modified).
IEC 60079-10 NOTE Harmonized as EN 60079-10:2003 (not modified).
IEC 60079-14 NOTE Harmonized as EN 60079-14:2003 (not modified).
IEC 60079-17 NOTE Harmonized as EN 60079-17:2007 (not modified).
IEC 60079-19 NOTE Harmonized as EN 60079-19:2007 (not modified).
IEC 60079-27 NOTE Harmonized as EN 60079-27:2006 (not modified).
IEC/TR 61241-2-2 NOTE Harmonized as EN 61241-2-2:1995 (not modified).
IEC 61241-14 NOTE Harmonized as EN 61241-14:2004 (not modified).
ISO/IEC 17000 NOTE Harmonized as EN ISO/IEC 17000:2004 (not modified).
__________
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SIST EN 60079-0:2009
EN 60079-0:2009 - 4 -
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year
1) 2)
IEC 60034-1 – Rotating electrical machines - EN 60034-1 2004
Part 1: Rating and performance
1) 2)
IEC 60034-5 – Rotating electrical machines - EN 60034-5 2001
Part 5: Degrees of protection provided by the
integral design of rotating electrical machines
(IP code) - Classification
1)
IEC 60050-426 – International Electrotechnical Vocabulary – –
(IEV) -
Chapter 426: Electrical apparatus for
explosive atmospheres
1) 2)
IEC 60079-1 – Explosive atmospheres - EN 60079-1 2007
Part 1: Equipment protection by flameproof
enclosures "d"
1) 2)
IEC 60079-2 – Explosive atmospheres - EN 60079-2 2007
Part 2: Equipment protection by pressurized
enclosure "p"
1)
IEC 60079-4 – Electrical apparatus for explosive gas – –
atmospheres -
Part 4: Method of test for ignition temperature
1) 2)
IEC 60079-5 – Explosive atmospheres - EN 60079-5 2007
Part 5: Equipment protection by powder filling
"q"
1) 2)
IEC 60079-6 – Explosive atmospheres - EN 60079-6 2007
Part 6: Equipment protection by oil immersion
"o"
1) 2)
IEC 60079-7 – Explosive atmospheres - EN 60079-7 2007
Part 7: Equipment protection by increased
safety "e"
1) 2)
IEC 60079-11 – Explosive atmospheres - EN 60079-11 2007
Part 11: Equipment protection by intrinsic
safety "i"
1) 2)
IEC 60079-15 – Electrical apparatus for explosive gas EN 60079-15 2005
atmospheres -
Part 15: Construction, test and marking of
type of protection "n" electrical apparatus
1)
Undated reference.
2)
Valid edition at date of issue.
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SIST EN 60079-0:2009
- 5 - EN 60079-0:2009
Publication Year Title EN/HD Year
1) 2)
IEC 60079-18 – Electrical apparatus for explosive gas EN 60079-18 2004
atmospheres - + corr. April 2006
Part 18: Construction, test and marking of
type of protection encapsulation "m" electrical
apparatus
1) 2)
IEC 60079-25 – Electrical apparatus for explosive gas EN 60079-25 2004
atmospheres - + corr. April 2006
Part 25: Intrinsically safe systems
1) 2)
IEC 60079-26 – Explosive atmospheres - EN 60079-26 2007
Part 26: Equipment with equipment protection
level (EPL) Ga
1) 2)
IEC 60079-28 – Explosive atmospheres - EN 60079-28 2007
Part 28: Protection of equipment and
transmission systems using optical radiation
1) 2)
IEC 60079-30-1 – Explosive atmospheres - EN 60079-30-1 2007
Part 30-1: Electrical resistance trace heating -
General and testing requirements
1) 3)
IEC 60079-31 – Explosive Atmospheres - EN 60079-31 200X
Part 31: Equipment dust ignition protection
by enclosure "tD"
1) 2)
IEC 60086-1 – Primary batteries - EN 60086-1 2007
Part 1: General
1)
IEC 60095-1 – Lead-acid starter batteries - – –
Part 1: General requirements and methods
of test
1) 2)
IEC 60192 – Low pressure sodium vapour lamps - EN 60192 2001
Performance specifications
1) 2)
IEC 60216-1 – Electrical insulating materials - EN 60216-1 2001
Properties of thermal endurance -
Part 1: Ageing procedures and evaluation
of test results
1) 2)
IEC 60216-2 – Electrical insulating materials - EN 60216-2 2005
Thermal endurance properties -
Part 2: Determination of thermal endurance
properties of electrical insulating materials -
Choice of test criteria
1) 2)
IEC 60243-1 – Electrical strength of insulating materials - EN 60243-1 1998
Test methods -
Part 1: Tests at power frequencies
1) 2)
IEC 60423 – Conduit systems for cable management - EN 60423 2007
Outside diameters of conduits for electrical
installations and threads for conduits and
fittings
1) 2)
IEC 60529 – Degrees of protection provided by EN 60529 1991
enclosures (IP Code) + corr. May 1993
1) 2)
IEC 60622 – Secondary cells and batteries containing EN 60622 2003
alkaline or other non-acid electrolytes -
Sealed nickel-cadmium prismatic
rechargeable single cells
3)
At draft stage.
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SIST EN 60079-0:2009
EN 60079-0:2009 - 6 -
Publication Year Title EN/HD Year
1) 2)
IEC 60623 – Secondary cells and batteries containing EN 60623 2001
alkaline or other non-acid electrolytes -
Vented nickel-cadmium prismatic
rechargeable single cells
1) 2)
IEC 60662 (mod) – High pressure sodium vapour lamps EN 60662 1993
1) 2)
IEC 60664-1 – Insulation coordination for equipment within EN 60664-1 2007
low-voltage systems -
Part 1: Principles, requirements and tests
1) 2)
IEC 60947-1 – Low-voltage switchgear and controlgear - EN 60947-1 2007
Part 1: General rules
1) 2)
IEC 61056-1 – General purpose lead-acid batteries EN 61056-1 2003
(valve regulated types) -
Part 1: General requirements, functional
characteristics - Methods of test
1) 2)
IEC 61241-1 – Electrical apparatus for use in the EN 61241-1 2004
presence of combustible dust - + corr. December 2006
Part 1: Protection by enclosures "tD"
1) 2)
IEC 61241-4 – Electrical apparatus for use in the EN 61241-4 2006
presence of combustible dust -
Part 4: Type of protection 'pD'
1) 2)
IEC 61241-11 – Electrical apparatus for use in the EN 61241-11 2006
presence of combustible dust -
Part 11: Protection by intrinsic safety 'iD'
1) 2)
IEC 61951-1 – Secondary cells and batteries containing EN 61951-1 2003
alkaline or other non-acid electrolytes -
Portable sealed rechargeable single cells -
Part 1: Nickel-cadmium
1) 2)
IEC 61951-2 – Secondary cells and batteries containing EN 61951-2 2003
alkaline or other non-acid electrolytes -
Portable sealed rechargeable single cells -
Part 2: Nickel-metal hydride
1) 2)
IEC 62013-1 – Caplights for use in mines susceptible to EN 62013-1 2006
firedamp - Part 1: General requirements -
Construction and testing in relation to the
risk of explosion
1)
ISO 48 – Rubber, vulcanized or thermoplastic - – –
Determination of hardness (hardness between
10 IRHD and 100 IRHD)
1) 2)
ISO 178 – Plastics - Determination of flexural EN ISO 178 2003
properties
ISO 179 Series Plastics - Determination of Charpy impact EN ISO 179 Series
properties
1)
ISO 262 – ISO general-purpose metric screw – –
threads - Selected sizes for screws, bolts
and nuts
1) 2)
ISO 273 – Fasteners - Clearance holes for bolts and EN 20273 1991
screws
1)
ISO 286-2 – ISO system of limits and fits - – –
Part 2: Tables of standard tolerance grades
and limit deviations for holes and shafts
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SIST EN 60079-0:2009
- 7 - EN 60079-0:2009
Publication Year Title EN/HD Year
1) 2)
ISO 527-2 – Plastics - Determination of tensile EN ISO 527-2 1996
properties -
Part 2: Test conditions for moulding and
extrusion plastics
1)
ISO 965-1 – ISO general-purpose metric screw threads - – –
Tolerances -
Part 1: Principles and basic data
1)
ISO 965-3 – ISO general-purpose metric screw threads - – –
Tolerances -
Part 3: Deviations for constructional threads
1)
ISO 1817 – Rubber, vulcanized - Determination of the – –
effect of liquids
1) 2)
ISO 4014 – Hexagon head bolts - EN ISO 4014 2000
Product grades A and B
1) 2)
ISO 4017 – Hexagon head screws - EN ISO 4017 2000
Product grades A and B
1) 2)
ISO 4026 – Hexagon socket set screws with flat point EN ISO 4026 2003
1) 2)
ISO 4027 – Hexagon socket set screws with cone point EN ISO 4027 2003
1) 2)
ISO 4028 – Hexagon socket set screws with dog point EN ISO 4028 2003
1) 2)
ISO 4029 – Hexagon socket set screws with cup point EN ISO 4029 2003
1) 2)
ISO 4032 – Hexagon nuts, style 1 - Product grades A EN ISO 4032 2000
and B
1) 2)
ISO 4762 – Hexagon socket head cap screws EN ISO 4762 2004
1) 2)
ISO 4892-1 – Plastics - Methods of exposure to laboratory EN ISO 4892-1 2000
light sources -
Part 1: General guidance
1)
ANSI/UL 746B – Polymeric Materials - Long-Term Property – –
Evaluations
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SIST EN 60079-0:2009
EN 60079-0:2009 - 8 -
Annex ZY
(informative)
Equipment groups and marking examples
Equipment groups
In all cases Equipment Protection Levels (EPL) as defined by EN 60079-0 are related to the
corresponding Equipment Groups and Equipment Categories according to the following table. The same
applies if a standard makes reference to the intended use of equipment in Zones according to the
definitions in EN 60079-10.
EN 60079-0 Directive 94/9/EC EN 60079-10-X
EPL Group Equipment Group Equipment Zones
Category
Ma M1 NA
I I
Mb M2
Ga 1G 0
Gb 2GII 1
Gc 3G 2
II
Da 1D 20
Db 2DIII 21
Dc 3D 22
Instructions
The manufacturer or his authorized representative in the Community is to draw up the instructions for use
in the required Community languages.
Marking
The marking according to this standard is to be supplemented by the marking according to Directive
94/9/EC. Examples are given below.
European marking examples
Directive part Standard part Equipment example
I M2 Ex d I Mb Mining equipment,
type of protection “Flameproof Enclosure” d
II 2G Ex e IIB T4 Gb Gas explosion protected equipment
type of protection, “Increased Safety” e
II 1D Ex ma IIIC 120°C Da Dust explosion protected equipment,
type of protection “Encapsulation” ma
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SIST EN 60079-0:2009
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NOTE Attention is drawn to the requirement in 29.8:
The Ex marking for explosive gas atmospheres and explosive dust atmospheres shall be separate and not combined:
II 1 G - Ex ia IIB T4
II 1 D - Ex ia IIIC T120°C
or alternatively:
II 1 GD
Ex ia IIB T4 Ga
Ex ia IIIC T120°C Da
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SIST EN 60079-0:2009
EN 60079-0:2009 - 10 -
Annex ZZ
(informative)
Coverage of Essential Requirements of EC Directives
This European Standard has been prepared under a mandate given to CENELEC by the European
Commission and the European Free Trade Association and within its scope the standard covers only the
following essential requirements out of those given in Annex II of the EC Directive 94/9/EC:
– ER 1.0.1 to ER 1.0.6;
– ER 1.1;
– ER 1.2.1 to ER 1.2.9;
– ER 1.3.1 to ER 1.3.4;
– ER 1.4.1, ER 1.4.2;
– ER 1.6.2, ER 1.6.4;
– ER 2.0 to ER 2.3.
Compliance with this standard provides one means of conformity with the specified essential
requirements of the Directive concerned.
WARNING: Other requirements and other EC Directives may be applicable to the products falling within
the scope of this standard.
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SIST EN 60079-0:2009
IEC 60079-0
Edition 5.0 2007-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Explosive atmospheres –
Part 0: Equipment – General requirements
Atmosphères explosives –
Partie 0: Matériel – Exigences générales
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
XD
CODE PRIX
ICS 29.260.20 ISBN 2-8318-9326-7
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SIST EN 60079-0:2009
TC 31/Publication 60079-0 (2007), Fifth edition/I-SH 01
EXPLOSIVE ATMOSPHERES –
Part 0: Equipment –
General requirements
INTERPRETATION SHEET
This interpretation sheet has been prepared by committee 31: Equipment for explosive
atmospheres, of IEC.
The text of this interpretation sheet is based on the following documents:
ISH Report on voting
31/768/ISH 31/779/RVD
Full information on the voting for the approval of this interpretation sheet can be found in the
report on voting indicated in the above table.
___________
Subclauses 26.8 and 26.9 of IEC 60079-0 (2007)
Following the discussions by the TC 31/WG 22 Task Group addressing the repeatability of the
thermal endurance to heat and thermal endurance to cold tests it was proposed that a
tolerance be clarified for the test periods in Edition 6, 31/744/DC was issued and comments
received and resolved as 31/752A/INF.
These interpretations are made available for edition 5 of this standard due to the current use
of that standard by manufacturers, conformity assessment schemes and national bodies by
means of this “Interpretation Sheet” as follows:
Details of interpretation:
Interpretation of subclause 26.8 Thermal endurance to heat and 26.9 Thermal endurance
to cold of IEC 60079-0 (2007):
Question: As it is unreasonable to consider them to be the exact test time, are the time
frames for the 24 h, 336 h (2 weeks) or 672 h (4 weeks) tests considered to be the minimum
times? If so, what is the maximum time?
Interpretation: The 24 h, 336 h and 672 h values are considered the minimum number of
+2
hours for each of the tests. It is practical that the time periods should not extend beyond 24
0
+30 +30
h, 336 h, 672 h.
0 0
It is intended that this interpretation will be introduced in IEC 60079-0 Edition 6 and therefore
an Interpretation Sheet will not be required for this or future editions.
November 2008 ICS 29.260.20 French text overleaf
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SIST EN 60079-0:2009
– 2 – 60079-0 © IEC:2007
CONTENTS
FOREWORD.8
1 Scope.10
2 Normative references .11
3 Terms and definitions .14
4 Equipment grouping .24
4.1 Group I.24
4.2 Group II.24
4.3 Group III.25
4.4 Equipment for a particular explosive atmosphere.25
5 Temperatures .25
5.1 Environmental influences .25
5.1.1 Ambient temperature .25
5.1.2 External source of heating or cooling.25
5.2 Service temperature .26
5.3 Maximum surface temperature .26
5.3.1 Determination of maximum surface temperature .26
5.3.2 Limitation of maximum surface temperature.26
5.3.3 Small component temperature for Group I or Group II electrical
equipment .27
6 Requirements for all electrical equipment .28
6.1 General .28
6.2 Mechanical strength of equipment .29
6.3 Opening times .29
6.4 Circulating currents .29
6.5 Gasket retention.30
6.6 Electromagnetic and ultrasonic energy radiating equipment .30
6.6.1 Radio frequency sources .30
6.6.2 Lasers or other continuous wave sources .31
6.6.3 Ultrasonic sources .31
7 Non-metallic enclosures and non-metallic parts of enclosures .31
7.1 General .31
7.1.1 Applicability .31
7.1.2 Specification of materials.31
7.1.3 Plastic materials .32
7.1.4 Elastomeric materials .32
7.2 Thermal endurance .32
7.2.1 Tests for thermal endurance .32
7.2.2 Material selection .32
7.3 Resistance to light.33
7.4 Electrostatic charges on external non-metallic materials.33
7.4.1 Applicability .33
7.4.2 Avoidance of a build-up of electrostatic charge on Group I or Group II
electrical equipment .33
7.4.3 Avoidance of a build-up of electrostatic charge on equipment for
Group III .35
7.5 Threaded holes .35
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SIST EN 60079-0:2009
60079-0 © IEC:2007 – 3 –
8 Metallic enclosures and metallic parts of enclosures.35
8.1 Material composition .35
8.1.1 Group I .35
8.1.2 Group II .35
8.1.3 Group III .36
8.2 Threaded holes .36
9 Fasteners .36
9.1 General .36
9.2 Special fasteners.36
9.3 Holes for special fasteners .37
9.3.1 Thread engagement .37
9.3.2 Tolerance and clearance .37
9.3.3 Hexagon socket set screws .38
10 Interlocking devices.38
11 Bushings .38
12 Materials used for cementing.38
13 Ex components.39
13.1 General .39
13.2 Mounting .39
13.3 Internal mounting .39
13.4 External mounting .39
14 Connection facilities and termination compartments .39
14.1 General .39
14.2 Termination compartment.39
14.3 Type of protection .40
14.4 Creepage and clearance .40
15 Connection facilities for earthing or bonding conductors .40
15.1 Equipment requiring earthing.40
15.1.1 Internal.40
15.1.2 External.40
15.2 Equipment not requiring earthing.40
15.3 Size of conductor connection.40
15.4 Protection against corrosion .41
15.5 Secureness of electrical connections.41
16 Entries into enclosures .41
16.1 General .41
16.2 Identification of entries .41
16.3 Cable glands .41
16.4 Blanking elements .42
16.5 Temperature at branching point and entry point.
...
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