UL 60079-31 (ND)-2015 National Differences For UL 60079-31 Explosive Atmospheres - Part 31 Equipment Dust Ignition Protection by Enclosure t (Second Edition)《UL 60079-31爆炸性环境的国家差异 .pdf
《UL 60079-31 (ND)-2015 National Differences For UL 60079-31 Explosive Atmospheres - Part 31 Equipment Dust Ignition Protection by Enclosure t (Second Edition)《UL 60079-31爆炸性环境的国家差异 .pdf》由会员分享,可在线阅读,更多相关《UL 60079-31 (ND)-2015 National Differences For UL 60079-31 Explosive Atmospheres - Part 31 Equipment Dust Ignition Protection by Enclosure t (Second Edition)《UL 60079-31爆炸性环境的国家差异 .pdf(8页珍藏版)》请在麦多课文档分享上搜索。
1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULNational Differences ForUL 60079-31Explosive Atmospheres - Part 31: Equipment Dust Ignition Protection by Enclosure tUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION
2、 WITHOUT PERMISSION FROM ULNational Differences ForUL 60079-31Explosive Atmospheres - Part 31: Equipment Dust Ignition Protection by Enclosure tEdition: 2Edition Date: June 12, 2015Adoption of IEC 60079-31, Explosive Atmospheres Part 31: Equipment Dust IgnitionProtection by Enclosure “t” (second edi
3、tion issued November 2013) as a new IEC-basedUL standard, UL 60079-31 (IEC 60079-31:2013), with US National Differences.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 ma
4、y be reproduced, stored in a retrieval system, ortransmitted in any form by any means, electronic, mechanical 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 limi
5、ted to, the implied warranties of merchantability or fitness for any purpose.In no event will UL be liable 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
6、use this standards document, even if UL or an authorized UL representative has been advisedof the possibility 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
7、ULs Standards for Safety agree to defend, indemnify, and hold ULharmless from and against any loss, expense, liability, damage, claim, or judgment (including reasonableattorneys fees) resulting from any error or deviation introduced while purchaser is storing an electronicStandard on the purchasers
8、computer system.Copyright 2015 Underwriters Laboratories Inc.JUNE 12, 2015NATIONAL DIFFERENCES FOR UL UL 60079-312UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULPrefaceThis document provides a single listing of the technical National Differen
9、ces included in the UL adoptionof the corresponding IEC standard.In its IEC-based standards, UL uses the 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 deviat
10、ions which are based on basic safety principles and requirements, elimination ofwhich would compromise safety 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 requiremen
11、ts would require considerable retesting or redesign on themanufacturers part.DC - These are deviations based 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
12、corrections.DR - These are deviations based on the national regulatory requirements.Each national difference 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 IEC
13、text:Addition / Add - An addition entails adding a complete new numbered clause, subclause, table,figure, 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
14、, or annex without any replacement text.Modification / Modify - A modification is an altering of the existing 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.JUNE 12, 2015 NATIO
15、NAL DIFFERENCES FOR UL UL 60079-31 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULNational Differences1DV.1 DR Modification of Clause 1, first and second paragraphs to replace with thefollowing:1DV.1.1 This part of IEC 60079 standard is appl
16、icable to electrical equipment protected byenclosure and surface temperature limitation for use in explosive dust atmospheres. Itspecifies requirements for design, construction and testing of electrical equipment and ExComponents.This standard supplements and modifies the general requirements of UL
17、IEC 60079-0.Where a requirement of this standard conflicts with a requirement of UL IEC 60079-0, therequirement of this standard takes precedence.1DV.2 DR Addition of 1DV.2.11DV.2.1 Where references are made to other IEC 60079 standards, the referencedrequirements found in these standards apply as m
18、odified by any applicable U.S. NationalDifferences.2DV D1 Modification of Clause 2 references to replace with the following:IEC 60079-0, Explosive atmospheres - Part 0: Equipment - General requirementsIEC 60127 (all parts), Miniature fusesIEC 60529, Degrees of Protection Provided by Enclosures (IP c
19、ode)IEC 60691, Thermal-links Requirements and application guideISA 60079-0, Explosive atmospheres Part 0: Equipment General requirementsISO 965-1, ISO general-purpose metric screw threads Tolerances Part 1: Principles andbasic dataUL 60079-0 Explosive atmospheres Part 0: Equipment General requiremen
20、tsUL 248 Series Low-Voltage Fuses4.3.5.1DV.1 DR Modification of Clause 4.3.5.1, second paragraph to replace with thefollowing:4.3.5.1DV.1.1 Where the external protective device is not provided by the manufacturer aspart of the electrical equipment, the marking to indicate the Specific Conditions of
21、Useshall be in accordance with include the symbol “X” in accordance with IEC 60079-0 UL60079-0, and the specific Conditions of Use shall detail the required ratings andcharacteristics of the protective device. The protective device shall be capable ofinterrupting the maximum current of the circuit i
22、n which it is installed. If the electricalequipment contains a cell or battery and a control device is provided to preventJUNE 12, 2015NATIONAL DIFFERENCES FOR UL UL 60079-314UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULoverheating of the c
23、ell or battery, the control device can also be considered as a protectivedevice, provided it also protects the complete electrical equipment from exceeding themaximum surface temperature.4.3.5.2DV D1 Modification of Clause 4.3.5.2 to replace with the following:The electrical equipment shall be prote
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