【英國標準word原稿】AS NZS 60079.17-2009 Explosive atmospheres Part 17 Electrical installations inspection and maintenance.doc

豆丁網(wǎng)：/kmust1as/nzs 60079.17:2009australian/new zealand standardexplosive atmospherespart 17: electrical installations inspection and maintenance(iec 60079-17, ed.4.0(2007) mod)第 7 頁 共 51 頁豆丁網(wǎng)：/kmust1as/nzs 60079.17:2009this joint australian/new zealand standard was prepared by joint technical committee el-014, equipment for explosive atmospheres. it was approved on behalf of the council of standards australia on 13 august 2009 and on behalf of the council of standards new zealand on 11 september 2009.this standard was published on 18 september 2009.the following are represented on committee el-014:auckland regional chamber of commerceaustralian chamber of commerce and industryaustralian industry groupaustralian institute of petroleum ltdaustralian petroleum production and exploration associationdepartment of mines and energy, qldelectrical compliance testing associationenergy networks associationengineers australiainstitute of instrumentation, control and automation australia inc. institution of professional engineers new zealandmining electrical and mining mechanical engineering societynational electrical and communications associationnew zealand employers and manufacturers associationnsw department of primary industries, mineral resourcesthe aviation and marine engineers associationsworkcover new south waleskeeping standards up-to-datestandards are living documents which reflect progress in science, technology and systems. to maintain their currency, all standards are periodically reviewed, and new editions are published. between editions, amendments may be issued. standards may also be withdrawn. it is important that readers assure themselves they are using a current standard, which should include any amendments which may have been published since the standard was purchased.detailed information about joint australian/new zealand standards can be found by visiting the standards web shop at .au or standards new zealand web site at www.standards.co.nz and looking up the relevant standard in the on-line catalogue.for more frequent listings or notification of revisions, amendments and withdrawals, standards australia and standards new zealand offer a number of update options. for information about these services, users should contact their respective national standards organization.we also welcome suggestions for improvement in our standards, and especially encourage readers to notify us immediately of any apparent inaccuracies or ambiguities. please address your comments to the chief executive of either standards australia or standards new zealand at the address shown on the back cover.this standard was issued in draft form for comment as dr 08194.as/nzs 60079.17:2009australian/new zealand standardexplosive atmospherespart 17: electrical installations inspection and maintenance(iec 60079-17, ed.4.0(2007) mod)first published as as/nzs 60079.17:2009.copyright standards australia/standards new zealandall rights are reserved. no part of this work may be reproduced or copied in any form or by any means, electronic or mechanical, including photocopying, without the written permission of the publisher.jointly published by standards australia, gpo box 476, sydney, nsw 2001 and standardsnew zealand, private bag 2439, wellington 6020isbn 0 7337 9243 xprefacethis standard was prepared by the joint standards australia/standards new zealand committee el-014, equipment for explosive atmospheres. in conjunction with as/nzs 60079.14, it will replace the as/nzs 2381, as 2381 and as 1076 series, two years after publication. after this time the as/nzs 2381, as 2381 and as 1076 series will be withdrawn. this standard, in conjunction with as/nzs 60079.14, will also replace as/nzs 61241.14, two years after publication. after this time as/nzs 61241.14 will be withdrawn.the objective of this standard is to set out the procedures for the inspection and maintenance of electrical installations within hazardous areas, where the hazard may be caused by flammable gases, vapours, mists, dusts, fibres or flyings.this standard is an adoption with national modifications and has been reproduced from iec 60079-17, ed.4.0(2007), explosive atmospheres - part 17: electrical installations inspection and maintenance. it has been varied as indicated to take account of australian/new zealand conditions and for the protection of human health and safety, a legitimate reason under the wto agreement on technical barriers to trade (tbt).variations to iec 60079-17, ed.4.0(2007) are indicated at the appropriate places throughout this standard. strikethrough (example) identifies iec text, tables and figures that, for the purposes of this australian/new zealand standard, are deleted. where text, tables or figures are added, each is set in its proper place and identified by shading (example). added figures are not themselves shaded, but are identified by a shaded border.this standard is implemented with the minimal changes to iec 60079-17 that are considered necessary for adoption within australia and new zealand. the adoption of this standard forms part of the strategic objective established by standards australia and standards new zealand for adoption of all of the iec 60079 series.the modification to the iec based standard introduces changes in both technical content and presentation. however, many of the technical changes are also introduced as a result of changes within the iec, as part of the fourth edition of iec 60079-14.the significant technical changes with respect to the previous iec edition are as follows:(a) additional requirements for inspection and maintenance of electrical installations for combustible dusts are included.(b) knowledge, skills and competencies of responsible persons, technical persons with executive function and operatives are explained in new annex b.(c) equipment protection levels (epls) have been introduced and are explained in the newannex c.as this standard is reproduced from an international standard, the following applies:(i) its number does not appear on each page of text and its identity is shown only on the cover and title page.(ii) a full point should be substituted for a comma when referring to a decimal marker.the terms normative and informative are used to define the application of the annex to which they apply. a normative annex is an integral part of a standard, whereas an informative annex is only for information and guidance.iiicontentspageintroduction . iv1 scope . 12 normative references . 13 terms and definitions . 34 general requirements . 54.1 documentation . 54.2 competencyqualification of personnel . 54.3 inspections . 54.4 periodic inspections . 74.5 continuous supervision by skilled personnel . 84.6 maintenance requirements . 104.7 environmental conditions . 114.8 isolation of equipment . 124.9 earthing and equipotential bonding . 134.10 specific conditions of use . 134.11 movable equipment and its connections . 134.12 inspection schedules (tables 1 to 4) . 145 additional inspection schedule requirements . 155.1 type of protection “d” flameproof enclosure (see table 1 andas/nzs 60079.1iec 60079-1) . 155.2 type of protection “e” increased safety (see table 1 andas/nzs 60079.7iec 60079-1) . 155.3 type of protection “i” and “id” intrinsic safety (see table 2 andas/nzs 60079.1iec 60079-1) or as/nzs 61241.11iec 61241-11) . 165.4 type of protection “p” and “pd” pressurized enclosure (see table 3 andas/nzs 60079.2iec 60079-2 or as/nzs 61241.4iec 61241-4) . 185.5 type of protection “n” (see table 1 or 2 and as/nzs 60079.15iec 60079-15) . 185.6 type of protection “td” protection by enclosure (see table 4 andas/nzs 61241.1iec 61241-1) . 185.7 types of protection “m” and “md” (encapsulation), “o” (oil-immersion) and“q” (powder-filling). 185.8 type of protection “v” ventilation (see as 1482) and analyser houses . 185.9 rooms with type of protection “p” pressurization (see as 2380.4 andiec/tr 60079-13) and pressurized rooms. 186 inspection schedules. 19annex a (informative) typical inspection procedure for periodic inspections. 24annex b (normative) knowledge, skills and competencies of “responsible persons”,“technical persons with executive function” and “operatives” . 25annex c (informative) introduction of an alternative risk assessment methodencompassing “equipment protection levels” for ex equipment . 27 annex za (informative) fitness-for-purpose assessment . 32bibliography . 37introductionelectrical installations in hazardous areas possess features specially designed to render them suitable for operations in such atmospheres. it is essential for reasons of safety in those areas that, throughout the life of such installations, the integrity of those special features is preserved; they therefore require initial inspection and eithera) regular periodic inspections thereafter, orb) continuous supervision by skilled personnelin accordance with this standard and, when necessary, maintenance.note correct functional operation of hazardous area installations does not mean, and should not be interpreted as meaning, that the integrity of the special features referred to above is preserved.37standards australia/standards new zealandaustralian/new zealand standardexplosive atmospherespart 17: electrical installations inspection and maintenance(iec 60079-17, ed.4.0(2007) mod)1 scopethis part of as/nzs 60079iec 60079 applies to users and covers factors directly related to the inspection and maintenance of electrical installations within hazardous areas only, where the hazard may be caused by flammable gases, vapours, mists, dusts, fibres or flyings.it does not include:other fundamental installation and inspection requirements for electrical installations;the verification of electrical equipment;the repair and reclamation of explosion protected equipment (see iec 60079-19 and/oras/nzs 3800).this standard supplements the requirements of as/nzs 3000iec 60364-6.in the case of dusts, fibres or flyings the level of housekeeping may influence the inspection and maintenance requirements.this standard is intended to be applied where there can be a risk due to the presence of explosive gas or dust mixtures with air or combustible dust layers under normal atmospheric conditions. it does not apply to underground mining areas, areas where a risk can arise due to the presence of hybrid mixtures, dusts of explosives that do not require atmospheric oxygen for combustion,pyrophoric substances.2 normative referencesthe 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.references to international standards that are struck through in this clause are replaced by references to australian or australian/new zealand standards that are listed immediately thereafter and identified by shading.as 1482, electrical equipment for explosive atmospheresprotection by ventilationtype of protection vas 2380.4, electricalequipmentfor explosiveatmospheresexplosion-protection techniquespressurized rooms or pressurized enclosuresas/nzs 3000, electrical installations (known as the australian/new zealand wiring rules)copyrightas/nzs 3800, electrical equipment for explosive atmospheresrepair and overhaulas 4360, risk managementas/nzs 4761, competencies for working with electrical equipment for hazardous areas(eeha)iec 60050-426, international electrotechnical vocabulary part 426: equipment for explosive atmospheresiec 60079-0, explosive atmospheres part 0: equipment general requirements as/nzs 60079.0, explosive atmospheresequipmentgeneral requirements iec 60079-1, explosive atmospheres part 1: equipment protection by flameproof enclosures “d”as/nzs 60079.1, explosive atmospheres, part 1: equipment protection by flameproof enclosures diec 60079-2, explosive atmospheres part 2: equipment protection by pressurized enclosure “p”as/nz 60079.2, explosiveatmospheres, part 2: equipment protection by pressurized enclosure piec 60079-7, explosive atmospheres part 7: equipment protection by increased safety “e”as/nzss 60079.7, explosive atmospheres, part 7: equipment protection by increased safety eiec 60079-10, electrical apparatus for explosive gas atmospheres part 10: classification of hazardous areasas/nzs 60079.10.1, explosive atmospheres, part 10-1: classification of areasexplosive gas atmospheres (iec 60079-10-1, ed.1.0(2008), mod)iec 60079-11, explosive atmospheres part 11: equipment protection by intrinsic safety ias/nzs 60079.11, explosive atmospheres, part 11: equipment protection by intrinsic safety iiec/tr 60079-13, electrical apparatus for explosive gas atmosphere part 13: construction and use of rooms or buildings protected by pressurizationiec 60079-14, electrical apparatus for explosive gas atmospheres part 14: electrical installations in hazardous areas (other than mines)as/nzs 60079.14, electrical apparatus for explosive gas atmospheres, part 14: electrical installations in hazardous areas (other than mines)iec 60079-15, electrical apparatus for explosive gas atmospheres part 15: construction, test and marking of type of protection n electrical apparatusas/nzs 60079.15, electrical apparatus for explosive gas atmospheres, part 15: construction, test and marking of type of protection n electrical apparatusiec/tr 60079-16, electrical apparatus for explosive gas atmospheres part 16: artificial ventilation for the protection of analyser(s) housesiec 60079-19, explosive atmospheres part 19: equipment repair, overhaul and reclamationiec 60364-6, low-voltage electrical installations part 6: verificationiec 61241 (all parts), combustible dustiec 61241-1, electrical apparatus for use in the presence of combustible dust part 1: protection by enclosures tdas/nzs 61241.1, electrical apparatus for use in the presence of combustible dust, part 1:protection by enclosures tdiec 61241-4, electrical apparatus for use in the prese