IEC TR 61241-2-2-1993 Electrical apparatus for use in the presence of combustible dust part 2 test methods section 2 method for determining the electrical resis.pdf

1、Publication 1241-2-2 de la CE1 (Premiere dition - 1993) Matriels lectriques destins tre utiliss en prsence de poussires combustibles Partie 2: Mthodes dessais Section 2: Mthode de dtermination de la rsistivit lectrique des couches de poussires Page 14 o p est la rsistivit en R; IEC Publication 1241-

2、2-2 (First edition - 1993) Electrical apparatus for use in the presence of combustible dust CORRIGENDUM lire: o p est la rsistivit en R.m; Part 2: Test methods Section 2: Method for determining the electrical resistivity of dust in layers 6.3 Calcul de la rsistivit Sous la seconde quation de larticl

3、e, au lieu de: Page 15 6.3 Calculation of resistivity Under the second equation in the clause, instead of: where p is the resistivity in R; read: where p is the resistivity in n.m; Mai 1994 May 1994 Copyright International Electrotechnical Commission Provided by IHS under license with IECNot for Res

4、aleNo reproduction or networking permitted without license from IHS-,-,-RAPPORT CE1 TECHNIQUE IEC TECHNICAL REPORT 1241 -2-2 Premire Bdition First edition 1993-08 . Matriels lectriques destins tre utiliss en prsence de poussires combustibles - Partie 2: Mthodes dessais - Section 2: Mthode de dtermin

5、ation de la rsistivit lectrique des couches de poussires Electrical apparatus for use in the presence of combustible dust - Part 2: Test methods - Section 2: Method for determining the electrical resistivity of dust in layers Numro de rfrence Reference number CEMEC 1241 -2-2: 1993 Copyright Internat

6、ional Electrotechnical Commission Provided by IHS under license with IECNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Rvision de la prsente publication Le contenu bhnique des publications de la CE1 est cons- tamment revu par la Commission afin dassurer quil refle

7、te bien ltat actuel de la technique. Les renseignements relatifs ce travail de rvision, ltablissement des Mitions rvises et aux mises jour peuvent tre obtenus auprs des Comits nationaux de la C E I et en consultant les documents Ci-dessous: Bulletin de la CE I Annuaire de la C E I Catalogue des publ

8、ications de ia C E I Publi annuellement Terminologie En ce qui concerne la terminologie gnrale, le lecteur se reportera la Publication 50 de la CEI: Vocabulaire Electrotechnique Intemationai (VEI), qui est tablie sous forme de chapitres spars traitant chacun dun sujet dfini lIndex g- nral tant publi

9、 sparment. Des dtails complets sur le VE1 peuvent tre obtenus sur demande. Les termes et dfinitions figurant dans la prsente publication ont - la Publication 617 de la C E I Symboles graphiques pour schmas. Les symboles et signes contenus dans la prsente publication ont t soit repris des Publication

10、s 27 ou 617 de la CEI, soit spcifiquement approuvs aux fins de cette publication. Publications de la C E I tablies par le mme Comit dEtudes Lattention du lecteur est attire sur le deuxime feuillet de la couverture, qui numre les publications de la C E I prpares par le Comit dEtudes qui a tabli la pr

11、sente publication. Revision of this publication The technical content of I E C publications is kept under con- stant review by the I E C, thus ensuring that the content reflects current technology. Information on the work of revision, the issue of revised edi- tions and amendment sheets may be obtai

12、ned from IEC National Committees and from the following I E C sources: I E C Bulletin IECYearbook Catalogue of I E C Publications Pubshed yearly Terminology For general terminology, readers are referred to I E C Publi- cation 50: international Electrotechnical Vocabulary (IEV), which is issued in th

13、e form of separate chapters each dealing with a Specinc field, the General index being published as a se parate booklet. Fuil details of the iEV wiii be supplied on request. The terms and definitions contained in the present publication have either been taken from the IEV or have been specifically a

14、pproved for the purpose of this publication. Graphical and letter symbols For graphical symbols, and letter symbols and signs approved by the I E C for general use, readers are referred to: - I E C Publication 27: Letter symbols to be. used in electrical technology; - I E C Publication 617: Graphica

15、l symbols for diagrams. The symbols and signs contained in the present publication have either been taken from IEC Publications 27 or 617, or have been specifically -ved for the pinpose of this publication. I E C publications prepared by the same Technical Committee The attention of readers is drawn

16、 to the back cover, which lists IEC publications issued by the Technical Committee which has prepared the present publication. Copyright International Electrotechnical Commission Provided by IHS under license with IECNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-

17、RAPPORT TECHNIQUE - TYPE 2 TECHNICAL REPORT - TYPE 2 CE1 IEC 1241 -2-2 Premire dition First edition 1993-08 Matriels lectriques destins tre utiliss en prsence de poussires combustibles - Partie 2: Mthodes dessais - Section 2: Mthode de dtermination de la rsistivit lectrique des couches de poussires

18、Electrical apparatus for use in the presence of combustible dust - Part 2: Test methods - Section 2: Method for determining the electrical resistivity of dust in layers 0 CE1 1993 Bols de reproduction rservs - Copyright - all nghs reserved I Auarnepailie de oate publicaton ne peut type 2, lorsque le

19、 sujet en question est encore en cours de dveloppement technique ou lorsque, pour une raison quelconque, la possibilit dun accord pour la publication dune Norme internationale peut tre envisage pour lavenir mais pas dans limmdiat; type 3, lorsquun comit dtudes a runi des donnes de nature diffrente d

20、e celles qui sont normalement publies comme Normes internationales, cela pouvant comprendre, par exemple, des informations sur ltat de la technique. Les rapports techniques de types 1 et 2 font lobjet dun nouvel examen trois ans au plus tard aprs leur publication afin de dcider ventuellement de leur

21、 transformation en Normes inter- nationales. Les rapports techniques de type 3 ne doivent pas ncessairement tre rviss avant que les donnes quils contiennent ne soient plus juges valables ou utiles. La CE1 1241-2-2, rapport technique du type 2, a t tablie par le sous-comit 31H: Matriels destins tre u

22、tiliss en prsence de poussires inflammables, du comit dtudes 31 de la CEI: Matriel lectrique pour atmospheres explosives. Copyright International Electrotechnical Commission Provided by IHS under license with IECNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-IEC 1

23、241 PT*2-2 93 4844891 0541139 581 1241-2-2 O IEC:1993 -5- INTERNATIONAL ELECTROTECHNICAL COMMISSION ELECTRICAL APPARATUS FOR USE IN THE PRESENCE OF COMBUSTIBLE DUST - Part 2: Test methods - Section 2: Method for determining the electrical resistivity of dust in layers FOREWORD 1) The IEC (Internatio

24、nal Electrotechnical Commission) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of the IEC is to promote international cooperation on all questions concerning standardization in the electrical and electronic f

25、ields. To this end and in addition to other activities, the IEC publishes International Standards. Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non-gov

26、ernmental organizations liaising with the IEC also participate in this preparation. The IEC collaborates closely with the Intemational Organization for Standardization (EO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of t

27、he IEC on technical matters, prepared by technical committees on which all the National Committees having a special interest therein are represented, express, as nearly as possible, an international consensus of opinion on the subjects dealt with. 3) They have the form of recommendations for interna

28、tional use published in the form of standards, technical reports or guides and they are accepted by the National Committees in that sense. 4) In order to promote international unification, IEC National Committees undertake to apply IEC International Standards transparently to the maximum extent poss

29、ible in their national and regional standards. Any divergence between the IEC Standard and the corresponding national or regional standard shall be clearly indicated in the latter. The main task of IEC technical committees is to prepare International Standards. In excep- tional circumstances, a tech

30、nical committee may propose the publication of a technical report of one of the following types: type 1. when the required support cannot be obtained for the publication of an Inter- national Standard, despite repeated efforts; type 2, when the subject is still under technical development or where f

31、or any other reason there is the future but not immediate possibility of an agreement on an Inter- national Standard; type 3, when a technical committee has collected data of a different kind from that which is normally published as an International Standard, for example “state of the art“. Technica

32、l reports of types 1 and 2 are subject to review within three years of publication to decide whether they can be transformed into International Standards. Technical reports of type 3 do not necessarily have to be reviewed until the data they provide are considered to be no longer valid or useful. IE

33、C 1241-2-2 which is a technical report of type 2, has been prepared by sub-commitee 31H: Apparatus for use in the presence of combustible dust, of IEC technical committee 31: Electrical apparatus for explosive atmospheres. Copyright International Electrotechnical Commission Provided by IHS under lic

34、ense with IECNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-IEC 1241 PT*2-2 93 4844893 0541140 2T3 Projet de comite 31H(SEC)32 -6- 1241-2-2 O CEI:1993 Le texte de ce rapport technique est issu des documents suivants: Rapport de vote 31 H(SEC)35 Le rapport de vote

35、indiqu dans le tableau ci-dessus donne toute information sur le vote ayant abouti lapprobation de ce rapport technique. Le prsent document est publi dans la srie des rapports techniques de type 2 (confor- mment G.4.2.2 de la partie 1 des Directives CEI/ISO) comme aune norme prospective dapplication

36、provisoire dans le domaine des matriels lectriques destins tre utiliss en prsence de poussires combustibles car son contenu na pas t confirm et il est dordre exprimental. Ce document ne doit pas tre considr comme une .Norme internationale. II est pro- pos pour une mise en oeuvre provisoire, dans le

37、but de recueillir des informations et dacqurir de lexprience quant son application dans la pratique. II est de rgle denvoyer les observations ventuelles relatives au contenu de ce document au Bureau Central de la CEI. II sera procd un nouvel examen de ce rapport technique de type 2 trois ans au plus

38、 tard aprb sa publication, avec la facult den prolonger la validit pendant trois autres annes, de le transformer en Norme internationale ou de lannuler. La CE1 1241 comprend les parties suivantes, prsentes sous le titre gnral Matriels lectriques destins tre utiliss en prsence de poussires combustibl

39、es: - Partie 1 : Matriels lectriques protgs par enveloppes Section i: 99, Spcification pour les matriels Section 2:199X, Slection, installation et entretien du matriel - Partie 2: Mthodes dessais . Section 2: 1993, Mthode de dtermination de la rsistivit lectrique des couches de poussires Dautres par

40、ties et sections sont ltude. Copyright International Electrotechnical Commission Provided by IHS under license with IECNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-IEC 3241 PT*2-2 93 4844893 0541141 33T 1241-2-2 O IEC:I993 -7- The text of this technical report i

41、s based on the following documents: Committee draft Report on voting 31 H(SEC)32 31 H(SEC)35 Full information on the voting for the approval of this technical report can be found in the report on voting indicated in the above table. This document is issued in the type 2 technical report series of pu

42、blications (according to (3.4.2.2 of part 1 of the IEC/ISO Directives) as a “prospective standard for provisional application in the field of electrical apparatus for use in the presence of combustible dust because it is untried and for experimental purposes only. This document is not to be regarded

43、 as an “International Standard“. It is proposed for provisional application so that information and experience of its use in practice may be gathered, Comments on the content of this document should be sent to the IEC Central Office. A review of this type 2 technical report will be carried out not l

44、ater than three years after its publication, with the options of either extension for a further three years or conversion to an International Standard or withdrawal. IEC 1241 consists of the following parts, under the general title Electrical apparatus for use in the presence of combustible dust: -

45、Part 1 : Electrical apparatus protected by enclosures . Section 1: 199X. Specification of apparatus Section 2:l 99X, Selection, installation, and maintenance of apparatus - Part 2: Test methods Section 2: 1993, Method for determining electrical resistivity of dust in layers Further parts and section

46、s are under consideration. Copyright International Electrotechnical Commission Provided by IHS under license with IECNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-a- 1241 -2-2 O CE1 1993 INTRODUCTION Le prsent rapport technique est applicable la dtermination de l

47、a rsistivit lectrique des couches de poussires. La mthode dessai nest pas utilisable pour les explosifs proprement dits, la poudre A canon, la dynamite ou les substances ou mlanges de substances qui, dans certaines conditions, peuvent se comporter de manire semblable. Quand un doute existe sur lexis

48、tence dun danger d aux proprits explosives, une indication peut tre obtenue en plaant une trs petite quantit de poussire en question sur la surface de lappareil indiqu dans la CE1 1241 -2-1*, chauffe 400 OC. Lessai dexplosivit ne met pas toujours en vidence la nature explosive de la poussire, de telle sorte quune situation .cratrice de danger* peut se produire. NOTE - II convient de prendre des prcautions pour garantir la sant du personnel ralisant