1、 IEC TS 60079-39 Edition 1.0 2015-06 TECHNICAL SPECIFICATION Explosive atmospheres Part 39:Intrinsically safe systems with electronically controlled spark duration limitation IEC TS 60079-39:2015-06(en)colourinside THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2015 IEC,Geneva,Switzerland All rig
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11、ly controlled spark duration limitation INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 29.260.20 ISBN 978-2-8322-2734-3 Registered trademark of the International Electrotechnical Commission Warning!Make sure that y ou obtained this publication from an authorized distributor.colourinside 2 IEC TS 6007
12、9-39:2015 IEC 2015 CONTENTS FOREWORD.5 INTRODUCTION.7 1 Scope.8 2 Normative references.8 3 Definitions.9 4 Power-i architecture.10 5 Requirements for Power-i devices.11 5.1 General.11 5.2 Power-i source.11 5.3 Power-i field device.13 5.4 Power-i wiring.14 5.5 Power-i terminator.15 5.6 Test instrumen
13、ts for Power-i loop check.15 5.7 Power-i application classes.15 6 System requirements.16 6.1 Selection of the permissible Power-i current class of the Power-i source.16 6.2 Verification of a Power-i system.17 7 Assessment and testing.19 7.1 Procedure to define safety-relevant parameters.19 7.2 Type
14、test.20 7.3 Routine test.20 8 Marking of Power-i devices.20 8.1 General.20 8.2 Examples of marking.20 9 Instructions.21 Annex A(normative)Assessment of Power-i safety parameters.22 A.1 General.22 A.2 Power-i specific test equipment.22 A.2.1 Power-i universal test equipment.22 A.2.2 Power-i dummy loa
15、d.23 A.3 Determination of the safety-relevant parameters for Power-i devices and Power-i wiring.24 A.3.1 General.24 A.3.2 Safety-relevant parameters for the Power-i source.24 A.3.3 Safety-relevant parameters for the Power-i field devices.31 A.3.4 Safety-relevant parameters for Power-i wiring.34 A.3.
16、5 Safety-relevant parameters for the Power-i terminator.36 Annex B(informative)Explanation and details of the Power-i basic concept.37 B.1 Physical basics of an ignition.37 B.2 Output characteristics of a Power-i source.39 B.3 Measurement and scientific results as basis for Power-i minimum ignition values.41 B.3.1 Test setups for the determination of the ignition probability.41 B.3.2 Result of the spark ignition tests and their implementation in Table 3.43 IEC TS 60079-39:2015 IEC 2015 3 Annex C
