UL 60079-5 (ND)-2009 National Differences For UL 60079-5 Explosive Atmospheres - Part 5 Equipment protection by powder filling q (Third Edition Reprint with revisions through and i.pdf

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1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULNational Differences ForUL 60079-5Explosive Atmospheres - Part 5: Equipment protection by powder filling qUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PE

2、RMISSION FROM ULNational Differences ForUL 60079-5Explosive Atmospheres - Part 5: Equipment protection by powder filling qEdition: 3Edition Date: July 24, 2009This revision to ANSI/UL 60079-5 is being issued to update the title page to reflect thereaffirmation of ANSI approval. No changes in require

3、ments have been made.As noted in the Commitment for Amendments statement located on the back side of the titlepage, UL and ISA are committed to updating this bi-national standard jointly. However, therevision pages dated November 22, 2013 will not be issued by ISA as revision pages but as anupdate t

4、o their standard.This document provides a single listing of the National Differences included in the UL adoption ofthe corresponding IEC standard.All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, ortransmitted in any form by any means, electronic, mech

5、anical photocopying, recording, or otherwisewithout prior permission of UL.UL provides this standards document as is without warranty of any kind, either expressed or implied,including but not limited to, the implied warranties of merchantability or fitness for any purpose.In no event will UL be lia

6、ble for any special, incidental, consequential, indirect or similar damages,including loss of profits, lost savings, loss of data, or any other damages arising out of the use of or theinability to use this standards document, even if UL or an authorized UL representative has been advisedof the possi

7、bility of such damage. In no event shall ULs liability for any damage ever exceed the pricepaid for this standards document, regardless of the form of the claim.Users of the electronic versions of ULs Standards for Safety agree to defend, indemnify, and hold ULharmless from and against any loss, exp

8、ense, liability, damage, claim, or judgment (including reasonableattorneys fees) resulting from any error or deviation introduced while purchaser is storing an electronicStandard on the purchasers computer system.Copyright Underwriters Laboratories Inc.NOVEMBER 22, 2013NATIONAL DIFFERENCES FOR UL UL

9、 60079-52UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULPrefaceThis document provides a single listing of the technical National Differences included in the UL adoptionof the corresponding IEC standard.In its IEC-based standards, UL uses the

10、notations indicated below to identify national difference type, andthese types are additionally noted in this document. The standard may not use all types of thesedeviations.D1 - These are deviations which are based on basic safety principles and requirements, elimination ofwhich would compromise sa

11、fety for U.S. consumers and users of products.D2 - These are deviations based on safety practices. These are deviations for IEC requirements that maybe acceptable, but adopting the IEC requirements would require considerable retesting or redesign on themanufacturers part.DC - These are deviations ba

12、sed on the component standards and will not be deleted until a particularcomponent standard is harmonized with the IEC component standard.DE - These are deviations based on editorial comments or corrections.DR - These are deviations based on the national regulatory requirements.Each national differe

13、nce contains a description of what the national difference entails. Typically one of thefollowing words is used to explain how the text of the national difference is to be applied to the base IECtext:Addition / Add - An addition entails adding a complete new numbered clause, subclause, table,figure,

14、 or annex. Addition is not meant to include adding select words to the base IEC text.Deletion / Delete - A deletion entails complete deletion of an entire numbered clause, subclause,table, figure, or annex without any replacement text.Modification / Modify - A modification is an altering of the exis

15、ting base IEC text such as theaddition, replacement or deletion of certain words or the replacement of an entire clause,subclause, table, figure, or annex of the base IEC text.NOVEMBER 22, 2013 NATIONAL DIFFERENCES FOR UL UL 60079-5 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR

16、DISTRIBUTION WITHOUT PERMISSION FROM ULNational Differences1DV.1 DR Modification of Clause 1 first paragraph as follows:1DV.1.1 Replace “part of IEC 60079” with “standard”.1DV.2 DR Addition of 1DV.2.1 and 1DV.2.21DV.2.1 The U.S. version of IEC 60079-5 does not include requirements for Group Ielectri

17、cal apparatus. Requirements for Group I electrical apparatus included in thisdocument are to be considered omitted in all instances where they appear.1DV.2.2 Where references are made to IEC 60079 standards, the referenced requirementsfound in these standards shall apply as modified by any applicabl

18、e U.S. NationalDifferences.2DV.1 DR Modification of Clause 2 title to replace as follows:Delete “Normative”.2DV.2 DR Modification of Clause 2 to replace with the following references:IEC 60529,Degrees of protection provided by enclosures (IP Code)ISO 3310-1,Test sieves Technical requirements and tes

19、ting Part 1: Test sieves of metal wire clothISO 3310-2,Test sieves Technical requirements and testing Part 2: Test sieves of perforated platesISO 2591-1,Test sieving Methods using test sieves of woven wire cloth and perforated metal plateUL 2225,Cables and Cable-Fittings for Use in Hazardous (Classi

20、fied) LocationsUL 60079-0,Electrical Apparatus for Explosive Gas Atmospheres Part 0: General requirementsUL 60079-1,Explosive Atmospheres Part 1: Equipment Protection by Flameproof Enclosure “d”UL 60079-7,Explosive Atmospheres Part 7: Equipment Protection by Increased Safety “e”UL 60079-11,Electrica

21、l Apparatus for Explosive Gas Atmospheres Part 11: Intrinsic Safety iNOVEMBER 22, 2013NATIONAL DIFFERENCES FOR UL UL 60079-54UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL4.1.3DV.1 DR Modification of Clause 4.1.3 second paragraph to replace

22、as follows:4.1.3DV.1.1 Delete “with the symbol “X” and replace “UL 60079-0 29.2i) of IEC 60079-0”with “to indicate that there are specific conditions of use”.4.2.1DV.1 DR Modification of Clause 4.2.1 title as follows:4.2.1DV.1.1 Replace “Requirements” with “Specification”.4.2.1DV.2 DR Modification o

23、f Clause 4.2.1 to replace as follows:4.2.1DV.2.1 Add “filling” before “material” and delete “tested”.4.5DV.1 DR Modification of Clause 4.5 to replace with the following:Terminations used for the entry of electrical conductors into a powder filled “q” enclosureshall be an integral part of the enclosu

24、re and shall be protected using a suitable type ofprotection such as “d”, “e”, or “i”. The connection between the terminations and thepowder filled “q” enclosure shall be as specified in 4.1.1.When a cable provides the direct entry of conductors into a powder filled “q” equipmentor Ex component, the

25、 cable gland shall comply with UL 2225 and shall not be capable ofbeing removed without obvious damage to the powder filled “q” enclosure.NOTE A flameproof “d” cable gland in accordance with UL 2225 may be required as theincreased safety “e” cable glands in accordance with UL 2225 may not provide ad

26、equatepressure sealing (see 5.1.1) of the powder filled “q” enclosure. This construction isgenerally only practical with a factory-installed cable and cable gland.4.8DV.1 DR Modification of Clause 4.8 to replace as follows:Delete “permissible limit temperature of the applicable”.4.9DV.1 DR Modificat

27、ion of Clause 4.9 first paragraph to replace as follows:4.9DV.1.1 Delete “limiting”, add “class” after “temperature” in the first sentence and add“see (4.8)” after “exceeded”.4.9DV.2 D2 Delete Clause 4.9 fifth paragraph:4.9DV.2.1 This paragraph does not apply.4.9DV.3 DR Modification of Clause 4.9 se

28、venth paragraph to replace with the following:4.9DV.3.1 When the fuse is not integral to the electrical equipment or parts of electricalequipment, the equipment shall be marked in accordance with UL 60079-0 to indicate thatthere are specific conditions of use and the specific conditions for use shal

29、l detail therequired fuse.4.9DV.4 DR Modification of Clause 4.9 eighth paragraph to replace with the following:4.9DV.4.1 When the fuse is not integral to an Ex component, the instructions shall detailthe required fuse.NOVEMBER 22, 2013 NATIONAL DIFFERENCES FOR UL UL 60079-5 5UL COPYRIGHTED MATERIAL

30、NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL4.9.1DV.1 DR Modification of Clause 4.9.1 second paragraph as follows:4.9.1DV.1.1 Replace “ia or ib” with “ia” or “ib” .4.9.3DV.1 DR Modification of Clause 4.9.3 third paragraph to replace with the following:4.9.3DV.1.1

31、 If the manufacturer does not provide a required short-circuit protective device,the electrical equipment or parts of electrical equipment shall be marked in accordancewith UL 60079-0 to indicate that there are specific conditions of use and the specificconditions of use shall detail the short-circu

32、it protective devices required.5.1.2DV.1 DR Modification of Clause 5.1.2 to replace as follows:Add “required by 4.1.3” after “enclosure” in the first sentence.5.1.4DV.1 DR Modification of Clause 5.1.4 third paragraph to replace as follows:Add “of the same sample” after “retesting”.5.1.5DV.1 DR Modif

33、ication of Clause 5.1.5 to replace with the following:Where fuses are used as protective devices for temperature limitation, the maximumtemperature under overload conditions shall be measured with a continuous current atleast 1,7 times the fuse rating.Where items other than fuses are used as protect

34、ive devices for temperature limitation, theequipment shall be tested to verify that the temperature class is not exceeded when thoseprotective devices operate.NOTE 1 To simulate overload conditions which may cause higher temperatures than innormal operation, it might be suitable to use power compone

35、nts mounted in the equipmentand subject to the maximum available power. Such components should be chosen andlocated in the equipment so that they are representative of the thermal characteristics ofthe components they represent.NOTE 2 The term “overload” should be understood to apply to a situation

36、where the Ex qequipment (or component such as a solid state relay or a luminaire ballast) controlsrather than consumes power and the temperature rise is, at least partly, related to theexternal load. In such cases, where the equipment is protected by a fuse rated at not morethan 170 % of the maximum

37、 normal current, the external load should be adjusted toachieve the maximum current through the fused circuit, but no more than 1.7 times thefuse rating. Internal faults should not be applied and are not considered to result in an“overload”.6DV.1 DR Modification of Clause 6, item c) as follows:6DV.1

38、.1 Replace “24 V d.c., 200 mA”, with “For example: “24 V d.c., 200 mA”,6DV.2 DR Modification of Clause 6, item d) as follows:6DV.2.1 Replace “Required external fuse: 315 mA” with “For example: “Required externalfuse: 315 mA”;NOVEMBER 22, 2013NATIONAL DIFFERENCES FOR UL UL 60079-56UL COPYRIGHTED MATE

39、RIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULA.2.1.2DV DR Modification of Clause A.2.1.2 Note as follows:Replace winning with “mining”.NOVEMBER 22, 2013 NATIONAL DIFFERENCES FOR UL UL 60079-5 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULNOVEMBER 22, 2013NATIONAL DIFFERENCES FOR UL UL 60079-58No Text on This Page