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1、BRITISH STANDARD BS IEC 60079-19:1993 IEC 60079-19: 1993 Electrical apparatus for explosive gas atmospheres Part 19: Repair and overhaul for apparatus used in explosive atmospheres (other than mines or explosives) ICS 29.260.20 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 11:49:51 GMT+00:0
2、0 2006, Uncontrolled Copy, (c) BSI BS IEC 60079-19:1993 This British Standard, having been prepared under the direction of the Electrotechnical Sector Board, was published under the authority of the Standards Board and comes into effect on 15 October 1997 BSI 09-1999 ISBN 0 580 28548 0 National fore
3、word This British Standard reproduces verbatim IEC 60079-19:1993 and implements it as the UK national standard. The UK participation in its preparation was entrusted by Technical Committee GEL/31, Electrical apparatus for explosive atmospheres, to Subcommittee GEL/31/11, Code of practice for electri
4、cal apparatus for explosive atmospheres, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international
5、and European developments and promulgate them in the UK. A list of organizations represented on this subcommittee can be obtained on request to its secretary. From 1 January 1997, all IEC publications have the number 60000 added to the old number. For instance, IEC 27-1 has been renumbered as IEC 60
6、027-1. For a period of time during the change over from one numbering system to the other, publications may contain identifiers from both systems. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standa
7、rds Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible fo
8、r their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the IEC title page, page ii, pages 1 to 22 and a back cover. This standard has bee
9、n updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 11:49:51 GMT+00:00 2006, Uncontrolled Copy
10、, (c) BSI BS IEC 60079-19:1993 BSI 09-1999i Contents Page National forewordInside front cover Text of IEC 79-191 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 11:49:51 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 11:49:51 GMT+00:
11、00 2006, Uncontrolled Copy, (c) BSI Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 11:49:51 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS IEC 60079-19:1993 ii BSI 09-1999 Contents Page Introduction1 1Scope1 2General requirements2 2.1Normative references2 2.2Definitions and terms2 2.3Statutor
12、y requirements3 2.4Instructions for the manufacturer4 2.5Instructions for the user4 2.6Instructions for the repairer4 3Additional requirements for the repair and overhaul of an apparatus with type of protection “d” (flameproof)7 3.1Application7 3.2Repair and overhaul7 3.3Reclamation9 3.4Modification
13、s10 4Additional requirements for the repair and overhaul of an apparatus with type of protection “i” (intrinsic safety)11 4.1Application11 4.2Repair and overhaul11 4.3Reclamation12 4.4Modifications12 5Additional requirements for the repair and overhaul of an apparatus with type of protection “p” (pr
14、essurized)13 5.1Application13 5.2Repair and overhaul13 5.3Reclamation14 5.4Modifications15 6Additional requirements for the repair and overhaul of an apparatus with type of protection “e” (increased safety)15 6.1Application15 6.2Repair and overhaul15 6.3Reclamation17 6.4Modifications18 7Additional r
15、equirements for the repair and overhaul of an apparatus with type of protection “n” (non-sparking)18 7.1Application18 7.2Repair and overhaul18 7.3Reclamation20 7.4Modifications21 Annex A (normative) Identification of repaired apparatus by marking22 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov
16、 26 11:49:51 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS IEC 60079-19:1993 BSI 09-19991 Introduction When an electrical apparatus is installed in areas where dangerous concentrations and quantities of flammable gases, vapours or mists may be present in the atmosphere, protective measures are to be
17、 applied to reduce the likelihood of explosion due to ignition by arcs, sparks or hot surfaces produced either in normal operation or under specified fault conditions. This part of IEC 79 is supplementary to other relevant IEC standards, for example IEC 364 as regards installation requirements, and
18、also refers to IEC 79 and its appropriate parts for the design requirements of suitable electrical apparatus. Clause 2 of this part of IEC 79 contains general requirements for the repair and overhaul of an apparatus and should be read in conjunction with the other relevant clauses of this standard d
19、ealing with the detailed requirements for individual types of protection. In cases where a protection apparatus incorporates more than one type of protection, reference should be made to all clauses involved. This part not only gives guidance on the practical means of maintaining the electrical safe
20、ty and performance requirements of repaired apparatus, but also defines procedures for maintaining, after repair, compliance of the apparatus with the provisions of the certificate of conformity or with the provisions of the appropriate explosion protection standard where a certificate is not availa
21、ble. The nature of the explosion protection offered by each type of protection varies according to its unique features. Reference should be made to the appropriate standard(s) for details. Users will utilize the most appropriate repair facilities for any particular item of equipment, whether they be
22、 the facilities of the manufacturer or a suitably competent and equipped repairer (see note 1). This part recognizes the necessity of a required level of competence for the repair of the apparatus. Some manufacturers may recommend that the apparatus be repaired only by them. In the case of the repai
23、r or overhaul of an apparatus which has been the subject of third-party certification, it may be necessary to clarify the position of the continued conformity of the apparatus with the certificate. NOTE 1Whilst some manufacturers recommend that certain equipment be returned to them for repair and so
24、me nominate repairers, there are also competent independent repair organizations who have the facilities to carry out this class of work. NOTE 2Third-party certification is generally not a legal requirement, but may be in specific areas of application. Assuming that repairs and overhauls are carried
25、 out using good engineering practices then: a) if manufacturers specified parts or parts as specified in the certification documentation are used in a repair or overhaul, the apparatus is presumed to be in conformity with the certificate; b) if repairs or modifications are carried out on the apparat
26、us specifically as detailed in the certification documents, the apparatus should still conform with the certificate; c) if repair or overhaul is carried out on the apparatus in accordance with this standard and other relevant standard(s), although not in compliance with a) and b) above, then it is u
27、nlikely that the apparatus will be unsafe although it may not conform fully with the certificate; d) if other repair or modification techniques are used, then it will be necessary to ascertain, from the manufacturers, and/or the certification authority, the suitability of the apparatus for continued
28、 use in a potentially explosive atmosphere. 1 Scope This part of IEC 79: gives instructions, principally of a technical nature, on the repair, overhaul, reclamation and modification of a certified apparatus designed for use in explosive atmospheres (other then mining applications or explosive proces
29、sing and manufacture); is not applicable to maintenance, other than when repair and overhaul cannot be disassociated from maintenance, neither does it give advice on cable entry systems which may require renewal when the apparatus is re-installed; assumes that good engineering practices are adopted
30、throughout. NOTEMuch of the content of this standard is concerned with the repair and overhaul of electrical rotating machines. This is not because they are the most important items of explosion-protected equipment but rather because they are often major items of repairable capital equipment in whic
31、h, whatever type of protection is involved, sufficient commonality of construction exists as to make possible more detailed instructions for their repair, overhaul, reclamation or modification. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 11:49:51 GMT+00:00 2006, Uncontrolled Copy, (c) BSI
32、 BS IEC 60079-19:1993 2 BSI 09-1999 2 General requirements This clause covers those aspects of repair, overhaul, reclamation and modification which are common to all explosion-protected apparatus. Subsequent clauses provide instructions for the additional requirements relevant to specific types of p
33、rotection. When an apparatus incorporates more than one type of protection, reference shall be made to the appropriate clauses. NOTEAdditional requirements for types of protection “o” and “q” have not been defined. 2.1 Normative references The following normative documents contain provisions which,
34、through reference in the text, constitute provisions of this part of IEC 79. At the time of publication, the editions were valid. All normative documents are subject to revision, and parties to agreements based on this part of IEC 79 are encouraged to investigate the possibility of applying the most
35、 recent editions of the normative documents listed below. Members of IEC and ISO maintain registers of currently valid International Standards. IEC 34, Rotating electrical machines. IEC 79, Electrical apparatus for explosive gas atmospheres. IEC 79-0:1983, Electrical apparatus for explosive gas atmo
36、spheres Part 0: General requirements. IEC 79-1:1990, Electrical apparatus for explosive gas atmospheres Part 1: Construction and verification test of flameproof enclosures of electrical apparatus. IEC 79-1A:1975, Electrical apparatus for explosive gas atmospheres First supplement: Appendix D: Method
37、 of test for ascertainment of maximum experimental safe gap. IEC 79-2:1983, Electrical apparatus for explosive gas atmospheres Part 2: Electrical apparatus type of protection “p”. IEC 79-7:1990, Electrical apparatus for explosive gas atmospheres Part 7: Increased safety “e”. IEC 79-11:1991, Electric
38、al apparatus for explosive gas atmospheres Part 11: Intrinsic safety “i”. IEC 79-14:1984, Electrical apparatus for explosive gas atmospheres Part 14: Electrical installations in explosive gas atmospheres (other than mines). IEC 79-15:1987, Electrical apparatus for explosive gas atmospheres Part 15:
39、Electrical apparatus with type of protection “n”. IEC 85:1984, Thermal evaluation and classification of electrical insulation. IEC 364:1989, Electrical installations of buildings. IEC 529:1989, Degrees of protection provided by enclosures (IP Code). ISO 4526:1984, Metallic coatings Electroplated coa
40、tings of nickel for engineering purposes. ISO 6158:1984, Metallic coatings Electroplated coatings of chromium for engineering purposes. ISO 9000:1987, Quality management and quality assurance standards Guidance for selection and use. 2.2 Definitions and terms For the purpose of this part of IEC 79,
41、the following definitions apply. 2.2.1 serviceable condition condition which permits a replacement or reclaimed component part to be used without prejudice to the performance or explosion protection aspects of the apparatus, with due regard to the certification requirements as applicable, in which s
42、uch a component part is used 2.2.2 repair action to restore a faulty apparatus to its fully serviceable condition and in compliance with the relevant standard NOTEThe relevant standard means the standard to which the apparatus was originally designed. 2.2.3 overhaul action to restore to a fully serv
43、iceable condition an apparatus which has been in use or in storage for a period of time but which is not faulty 2.2.4 maintenance routine actions taken to preserve the fully serviceable condition of the installed apparatus 2.2.5 component part an indivisible item NOTEThe assembly of such items may f
44、orm an apparatus. 2.2.6 reclamation means of repair involving, for example, the removal or addition of material to reclaim component parts which have sustained damage, in order to restore such parts to a serviceable condition in accordance with the relevant standard NOTEThe relevant standard means t
45、he standard to which the individual parts were originally manufactured. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 11:49:51 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS IEC 60079-19:1993 BSI 09-19993 2.2.7 modification change to the design of the apparatus which affects material, fit, f
46、orm or function 2.2.8 manufacturer maker of the apparatus (who may also be the supplier, the importer or the agent) in whose name usually the certification where appropriate of the apparatus was originally registered 2.2.9 user user of the apparatus 2.2.10 repairer repairer of the apparatus who may
47、be the manufacturer, the user or a third party (repair agency) 2.2.11 certification certification leading to the issue of a certificate of conformity which refers primarily to assessments of apparatus carried out by a recognized testing authority this standard may also apply to apparatus certified b
48、y other certification authorities, or to apparatus which has been self-certified by manufacturers or users as complying with recognized standards 2.2.12 certificate references a certificate reference number may refer to a single design or a range of apparatus of similar design the suffix “X” when ad
49、ded to the certificate number indicates special conditions of use and that the certification documents need to be studied before such apparatus is installed, repaired, overhauled, reclaimed or modified NOTESee 25.2 9) of IEC 79-0. 2.2.13 copy winding process by which a winding is totally or partially replaced by another, the characteristics and properties of which are at least as good as those of the original 2.2.14 type of protection “d” type of protection in which parts which can ignite an explosive atmosphere are placed in an enclosure whic