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1、BRITISH STANDARD BS EN 60079-6:2007 Incorporating corrigendum June 2008 Explosive atmospheres Part 6: Equipment protection by oil immersion “o” ICS 29.260.20 ? Copyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Licensee=Boeing Co/5910770001, User=Japan
2、, IHS Not for Resale, 10/17/2008 22:57:02 MDTNo reproduction or networking permitted without license from IHS -,-,- BS EN 60079-6:2007 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 April 2008 BSI 2008 ISBN 978 0 580 62960 0 National fore
3、word This British Standard is the UK implementation of EN 60079-6:2007. It is identical with IEC 60079-6:2007. It supersedes BS EN 50015:1994 which is withdrawn, and BS EN 50015:1998 which is declared obsolescent and will be withdrawn no later than 1 May 2010. The UK participation in its preparation
4、 was entrusted to Technical Committee GEL/31, Equipment for explosive atmospheres. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its
5、 correct application. Compliance with a British Standard cannot confer immunity from legal obligations. Amendments/corrigenda issued since publication DateComments 30 June 2008Correcting supersession details in national foreword Copyright British Standards Institution Provided by IHS under license w
6、ith BSI - Uncontrolled Copy Licensee=Boeing Co/5910770001, User=Japan, IHS Not for Resale, 10/17/2008 22:57:02 MDTNo reproduction or networking permitted without license from IHS -,-,- EUROPEAN STANDARD EN 60079-6 NORME EUROPENNE EUROPISCHE NORM May 2007 CENELEC European Committee for Electrotechnic
7、al Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2007 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60
8、079-6:2007 E ICS 29.260.20 Supersedes EN 50015:1998 English version Explosive atmospheres - Part 6: Equipment protection by oil immersion “o“ (IEC 60079-6:2007) Atmosphres explosives - Partie 6: Protection du matriel par immersion dans lhuile “o“ (CEI 60079-6:2007) Explosionsfhige Atmosphre - Teil 6
9、: Gerteschutz durch lkapselung “o“ (IEC 60079-6:2007) This European Standard was approved by CENELEC on 2007-05-01. 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
10、 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
11、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
12、, 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. Copyright British Standards Institution Provided by IHS unde
13、r license with BSI - Uncontrolled Copy Licensee=Boeing Co/5910770001, User=Japan, IHS Not for Resale, 10/17/2008 22:57:02 MDTNo reproduction or networking permitted without license from IHS -,-,- Foreword The text of document 31/673/FDIS, future edition 3 of IEC 60079-6, prepared by IEC TC 31, Equip
14、ment for explosive atmospheres, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60079-6 on 2007-05-01. This European Standard supersedes EN 50015:1998. This standard is to be used in conjunction with EN 60079-0:2006. The following dates were fixed: latest date by whi
15、ch the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2008-02-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2010-05-01 This European Standard has been prepared under a mandate giv
16、en to CENELEC by the European Commission and the European Free Trade Association and covers essential requirements of EC Directive ATEX (94/9/EC). See Annex ZZ. Annexes ZA and ZZ have been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 60079-6:2007 was approved by
17、CENELEC as a European Standard without any modification. _ 2 BS EN 60079-6:2007 Copyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Licensee=Boeing Co/5910770001, User=Japan, IHS Not for Resale, 10/17/2008 22:57:02 MDTNo reproduction or networking permi
18、tted without license from IHS -,-,- CONTENTS 1 Scope.4 2 Normative references .4 3 Terms and definitions .5 4 Constructional requirements.6 4.1 General.6 4.2 Protective liquid.6 4.3 Group I equipment.6 4.4 Deterioration of the protective liquid 6 4.5 Guarding of fasteners7 4.6 Protective level indic
19、ation7 4.7 Limiting temperature8 4.8 Immersion depth8 4.9 Capillary or siphon action 8 4.10 Devices for draining of liquid .8 4.11 Sealed enclosures.8 4.12 Non-sealed enclosures8 4.13 External connections .9 5 Verifications and tests 9 5.1 Type tests .9 5.2 Routine tests.9 6 Marking 10 7 Instruction
20、s.10 Annex A (informative) Introduction of an alternative risk assessment method encompassing “equipment protection levels“ for Ex equipment .11 Table A.1 Traditional relationship of EPLs to Zones (no additional risk assessment)13 Table A.2 Description of risk of ignition protection provided .14 3 A
21、nnex ZA (normative) Normative references to international publications with their corresponding European publications .16 Annex ZZ (informative) Coverage of Essential Requirements of EC Directives18 BS EN 60079-6:2007 Copyright British Standards Institution Provided by IHS under license with BSI - U
22、ncontrolled Copy Licensee=Boeing Co/5910770001, User=Japan, IHS Not for Resale, 10/17/2008 22:57:02 MDTNo reproduction or networking permitted without license from IHS -,-,- EXPLOSIVE ATMOSPHERES Part 6: Equipment protection by oil immersion “o“ 1 Scope This part of IEC 60079 specifies the requireme
23、nts for the construction and testing of oil- immersed electrical equipment, oil-immersed parts of electrical equipment and Ex components in the type of protection oil immersion “o“, intended for use in explosive gas atmospheres. NOTE Type of protection oil immersion “o” provides equipment protection
24、 level (EPL) Gb. For further information, see Annex A. This standard supplements and modifies the general requirements of IEC 60079-0. Where a requirement of this standard conflicts with a requirement of IEC 60079-0, the requirement of this standard takes precedence. This standard is applicable to e
25、lectrical equipment, parts of electrical equipment, and Ex components which, in the absence of oil immersion, are not ignition capable in normal operation as determined by IEC 60079-15 or IEC 60079-11. 2 Normative references The following referenced documents are indispensable for the application of
26、 this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60079-0, Electrical apparatus for explosive gas atmospheres Part 0: General requirements IEC 60079-7, Electrical apparat
27、us for explosive gas atmospheres Part 7: Increased safety “e” IEC 60079-11, Electrical apparatus for explosive gas atmospheres Part 11: Intrinsic safety “i” IEC 60079-15, Electrical apparatus for explosive gas atmospheres Part 15: Construction, test and marking of type of protection “n” electrical a
28、pparatus IEC 60156, Insulating liquids Determination of the breakdown voltage at power frequency Test method IEC 60247, Insulating liquids Measurement of relative permittivity, dielectric dissipation factor (tan ) and d.c. resistivity IEC 60296, Fluids for electrotechnical applications Unused minera
29、l insulating oils for transformers and switchgear 4 BS EN 60079-6:2007 Copyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Licensee=Boeing Co/5910770001, User=Japan, IHS Not for Resale, 10/17/2008 22:57:02 MDTNo reproduction or networking permitted with
30、out license from IHS -,-,- IEC 60529, Degrees of protection provided by enclosures (IP Code) Amendment 1 (1999) IEC 60588-2, Askarels for transformers and capacitors Part 2: Test methods IEC 60836: Specifications for unused silicone insulating liquids for electrotechnical purposes ISO 2719, Determin
31、ation of flash point Pensky-Martens closed cup method ISO 3016, Petroleum oils Determination of pour point ISO 3104, Petroleum products Transparent and opaque liquids Determination of kinematic viscosity and calculation of dynamic viscosity 3 Terms and definitions For the purposes of this document,
32、the following terms and definitions apply; they supplement the terms and definitions given in IEC 60079-0. NOTE Additional definitions applicable to explosive atmospheres can be found in IEC 60050-426. 3.1 oil immersion “o“ type of protection in which the electrical equipment or parts of the electri
33、cal equipment are immersed in a protective liquid in such a way that an explosive gas atmosphere which may be above the liquid or outside the enclosure cannot be ignited 3.2 protective liquid mineral oil conforming to IEC 60296 or an alternative liquid meeting the requirements of 4.2 3.3 sealed equi
34、pment equipment designed and constructed in such a manner as to prevent ingress of an external atmosphere during the expansion and contraction of the internally contained liquid during normal operation, for example, by means of an expansion vessel 3.4 non-sealed equipment equipment designed and cons
35、tructed in such a manner as to allow the ingress and egress of an external atmosphere during the expansion and contraction of the internally contained fluid during normal operation 3.5 maximum permissible protective liquid level maximum level that the protective liquid can attain in normal service,
36、taking into account the effects of expansion from the worst-case filling condition specified by the manufacturer to the condition of full load at maximum ambient temperature for which the equipment is designed 5 BS EN 60079-6:2007 Copyright British Standards Institution Provided by IHS under license
37、 with BSI - Uncontrolled Copy Licensee=Boeing Co/5910770001, User=Japan, IHS Not for Resale, 10/17/2008 22:57:02 MDTNo reproduction or networking permitted without license from IHS -,-,- 3.6 minimum permissible protective liquid level minimum level that the protective liquid can attain in normal ser
38、vice taking into account the effects of contraction from the worst-case filling condition to the condition of de-energization at minimum ambient temperature 4 Constructional requirements 4.1 General Electrical circuits and components intended to be immersed in the oil shall not be ignition capable i
39、n normal operation in accordance with IEC 60079-15 or IEC 60079-11, with group I equipment required to meet the requirements for group IIA in IEC 60079-15. The enclosure of oil immersed “o” equipment shall be in accordance with IEC 60079-0. 4.2 Protective liquid Protective liquid other than mineral
40、oil conforming to IEC 60296 shall comply with all of the following requirements: a) the protective liquid shall have a fire point of 300 C (minimum) determined by the test method indicated in IEC 60836; b) the protective liquid shall have a flash-point (closed) of 200 C (minimum) determined in accor
41、dance with ISO 2719; c) the protective liquid shall have a kinematic viscosity of 100 cSt (maximum) at 25 C determined in accordance with ISO 3104; d) the protective liquid shall have an electrical breakdown strength of 27 kV (minimum) determined in accordance with IEC 60156. In the case of silicone
42、 liquids, IEC 60836 shall be used; e) the protective liquid shall have a volume resistivity at 25 C of 1 1012 m (minimum) determined in accordance with IEC 60247; f) the pour point shall be 30 C (maximum) determined in accordance with ISO 3016; g) the acidity (neutralization value) shall be 0,03 mg
43、KOH/g (maximum) determined in accordance with IEC 60588-2; NOTE The reference to IEC 60588-2 identifies a test method only; it does not allow the use of substances prohibited by legislation. h) the protective liquid shall have no adverse effect on the properties of materials with which it is in cont
44、act. The manufacturer shall prepare documentation showing compliance with the above. 4.3 Group I equipment For group I equipment, mineral oils are not acceptable. 4.4 Deterioration of the protective liquid The equipment shall be constructed so that deterioration of the protective liquid by dust or h
45、umidity from the exterior is prevented by the following means. 6 BS EN 60079-6:2007 Copyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Licensee=Boeing Co/5910770001, User=Japan, IHS Not for Resale, 10/17/2008 22:57:02 MDTNo reproduction or networking p
46、ermitted without license from IHS -,-,- Equipment which is sealed shall be provided with a pressure-relief device. This device shall be set and sealed by the manufacturer of the liquid-filled equipment to operate at least at 1,1 times the pressure above the liquid level at the maximum permissible pr
47、otective liquid level. The equipment shall have a degree of protection of at least IP66 as given in IEC 60529 with no ingress of water. At the end of any water ingress tests, no water shall be visible inside the enclosure. Equipment which is not sealed shall be constructed so that gas or vapour whic
48、h may evolve from the protective liquid in normal service can readily escape. A breathing device complete with suitable drying agent shall be provided. The manufacturer shall specify the maintenance requirements for the drying agent. The outlet of the breathing device for non- sealed equipment and the outlet of the pressure relief device for sealed equip