1、 IEC TS 62257-5 Edition 2.0 2015-12 TECHNICA L SPECIFICA TION Recommendations for renewable energy and hybrid sy stems for rural elect rificat ion Part 5:Prot ect ion against electrical hazards IEC TS 62257-5:2015-12(en)colourinsideInternational Electrotechnical Commission THIS PUBLICA TION IS COPYR
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11、ion 2.0 2015-12 TECHNICA L SPECIFICA TION R ecommendat ions for renewable energy and hybrid syst ems for rural elect rificat ion Part 5:Prot ect ion against elect rical hazards INTERNATIONA L ELECTROTECHNICA L COMMISSION ICS 27.160 ISBN 978-2-8322-3070-1 R egist er ed tr ademar k of t he Int er nati
12、onal Electr ot echnical Commission W arning!Make sure that y ou obtained this publication from an authorized distributor.colourinsideInternational Electrotechnical Commission 2 IEC TS 62257-5:2015 IEC 2015 CONTENTS FOREWORD.5 INTRODUCTION.7 1 Scope.8 2 Normative references.8 3 Terms and definitions.
13、9 4 Classification of decentralised rural electrification systems.11 5 Protection against electric shock.11 5.1 General.11 5.2 Requirements on the d.c.side of a DRES.11 5.3 Requirements on the a.c.side of a DRES.12 5.3.1 General.12 5.3.2 TT system.12 5.3.3 TN system.12 6 Protection against overcurre
14、nt.13 6.1 General.13 6.2 Protection against overload currents.13 6.3 Protection against short-circuits.13 7 Protection against risk of fire.13 8 Protection against effects of lightning.14 8.1 Principle.14 8.2 Examples.14 8.3 Protection against overvoltage.14 8.4 Protection against direct lightning.1
15、4 9 Determination of the pick up area of a rod or wire(see IEC 62305-3:2010).14 9.1 General.14 9.2 Operational conditions and external influences.14 9.3 Wiring system.15 9.4 Isolation and switching.15 9.4.1 Isolation.15 9.4.2 Over-current protective devices.16 9.4.3 Residual Current Devices(RCD).17
16、9.5 Surge protective devices.17 9.6 Earthing arrangement,protective conductors and protective bonding conductors.18 9.6.1 Earth electrodes.18 9.6.2 Protective bonding conductors.19 10 Verification.19 11 Operation and maintenance.19 Annex A(informative)Protection against electric shock in electrical installations.20 A.1 Protection against electric shock.20 A.2 Automatic disconnection of supply.20 A.2.1 General.20 A.2.2 In TN systems.21 A.2.3 In TT systems.21 A.3 Double or reinforced insulation.22
