Remerciez-le!

Remerciez @Admin pour avoir partagé cet document gratuitement, de la manière la plus simple, en partageant sur les réseaux sociaux.

IEC 60664-3 Edition 3.0 2016-11 REDLINE VERSION Insulation coordination for equ

IEC 60664-3 Edition 3.0 2016-11 REDLINE VERSION Insulation coordination for equipment within low-voltage systems – Part 3: Use of coating, potting or moulding for protection against pollution INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 29.080.30 ISBN 978-2-8322-3738-0 BASIC SAFETY PUBLICATION ® Registered trademark of the International Electrotechnical Commission ® Warning! Make sure that you obtained this publication from an authorized distributor. colour inside This is a preview - click here to buy the full publication – 2 – IEC 60664-3:2016 RLV © IEC 2016 CONTENTS FOREWORD ........................................................................................................................... 4 INTRODUCTION ..................................................................................................................... 6 1 Scope .............................................................................................................................. 7 2 Normative references ...................................................................................................... 7 3 Terms and definitions ...................................................................................................... 8 4 Design requirements ...................................................................................................... 10 4.1 Principles .............................................................................................................. 10 4.2 Application range regarding with regards to the environment ................................ 10 4.3 Requirements for the types of protection ............................................................... 10 4.4 Dimensioning procedures ...................................................................................... 10 5 Tests ............................................................................................................................. 11 5.1 General ................................................................................................................. 11 5.2 Specimens for testing coatings ............................................................................. 12 5.3 Specimens for testing mouldings and potting ........................................................ 12 5.4 Preparation of test specimens ............................................................................... 12 5.5 Visual examination ................................................................................................ 12 5.6 Scratch-resistance test ......................................................................................... 12 5.7 Conditioning of the test specimens ........................................................................ 13 5.7.1 General ......................................................................................................... 13 5.7.2 Cold conditioning ........................................................................................... 13 5.7.3 Dry-heat conditioning ..................................................................................... 14 5.7.4 Rapid change of temperature ......................................................................... 14 5.7.5 Damp heat, steady-state with polarizing voltage ............................................ 15 5.8 Mechanical and electrical tests after conditioning and electromigration ................. 15 5.8.1 General test conditions .................................................................................. 15 5.8.2 Adhesion of coating ....................................................................................... 16 5.8.3 Insulation resistance between conductors ...................................................... 16 5.8.4 AC withstand Voltage test .............................................................................. 16 5.8.5 Partial discharge extinction voltage ............................................................... 17 5.9 Additional tests ..................................................................................................... 17 5.9.1 General ......................................................................................................... 17 5.9.2 Resistance to soldering heat .......................................................................... 17 5.9.3 Flammability .................................................................................................. 17 5.9.4 Solvent resistance ......................................................................................... 17 Annex A (normative) Test sequences ................................................................................... 18 Annex B (normative) Decisions to be taken by the technical committees’ decisions ............. 21 B.1 General ................................................................................................................. 21 B.2 Decisions required by technical committees .......................................................... 21 B.3 Optional test conditions......................................................................................... 21 Annex C (normative) Printed wiring board for testing coatings ............................................. 22 C.1 General ................................................................................................................. 22 C.2 Specification of the printed wiring board................................................................ 22 C.3 Arrangement of the conductors ............................................................................. 22 C.4 Arrangement of lands ............................................................................................ 23 C.5 Connections for the tests ...................................................................................... 23 This is a preview - click here to buy the full publication IEC 60664-3:2016 RLV © IEC 2016 – 3 – Bibliography .......................................................................................................................... 26 Figure 1 – Scratch-resistance test for protecting layers ......................................................... 13 Figure C.1 – Configuration of the test specimen .................................................................... 24 Figure C.2 – Configuration of lands and adjacent conductors ................................................ 25 Table 1 – Minimum spacings for type 2 protection ................................................................. 11 Table 2 – Dry-heat conditioning ............................................................................................ 14 Table 3 – Degrees of severities for rapid change of temperature ........................................... 15 Table A.1 – Test sequence 1 ................................................................................................ 18 Table A.2 – Test sequence 2 additional conditioning with respect to electromigration ........... 19 Table A.3 – Additional tests .................................................................................................. 20 This is a preview - click here to buy the full publication – 4 – IEC 60664-3:2016 RLV © IEC 2016 INTERNATIONAL ELECTROTECHNICAL COMMISSION ____________ INSULATION COORDINATION FOR EQUIPMENT WITHIN LOW-VOLTAGE SYSTEMS – Part 3: Use of coating, potting or moulding for protection against pollution FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). 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- governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees. 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user. 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any services carried out by independent certification bodies. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. DISCLAIMER This Redline version is not an official IEC Standard and is intended only to provide the user with an indication of what changes have been made to the previous version. Only the current version of the standard is to be considered the official document. This Redline version provides you with a quick and easy way to compare all the changes between this standard and its previous edition. A vertical bar appears in the margin wherever a change has been made. Additions are in green text, deletions are in strikethrough red text. This is a preview - click here to buy the full publication IEC 60664-3:2016 RLV © IEC 2016 – 5 – International Standard IEC 60664-3 has been prepared by IEC technical committee TC 109: Insulation co-ordination for low-voltage equipment. It has the status of a basic safety publication in accordance with IEC Guide 104. This third edition cancels and replaces the second edition published in 2003 and Amendment 1:2010. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) information added concerning interpolation; b) provided scratch test is only for type 2 protection; c) renumbered the scratch test to follow the visual examination test, since it makes more sense there; d) separated the tables under what is now called Annex A, to make them clearer. The text of this standard is based on the following documents: FDIS Report on voting 109/153/FDIS 109/154/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. In this standard, the following types are used: – Terms used throughout this standard which have been defined in Clause 3: bold type A list of all parts in the IEC 60664 series, published under the general title Insulation coordination for equipment within low-voltage systems, can be found on the IEC website. The committee has decided that the contents of this publication will remain unchanged until the stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to the specific publication. At this date, the publication will be • reconfirmed, • withdrawn, • replaced by a revised edition, or • amended. IMPORTANT – The “colour inside” logo on the cover page of this publication indicates that it contains colours which are considered to be useful for the correct understanding of its contents. Users should therefore print this publication using a colour printer. This is a preview - click here to buy the full publication – 6 – IEC 60664-3:2016 RLV © IEC 2016 INTRODUCTION This part of IEC 60664 details the conditions in which the reduction of clearance and creepage distances can apply to rigid assemblies such as printed boards or terminals of components. Protection against pollution can be achieved by any kind of encapsulation such as coating, potting or moulding. The protection may be applied to one or both sides of the assembly. This standard specifies the insulating properties uploads/Litterature/info-iec60664-3-ed3-0-rlv-en.pdf