1、 IEC 61892-7Edition 2.0 2007-11INTERNATIONAL STANDARD Mobile and fixed offshore units Electrical installations Part 7:Hazardous areas IEC 61892-7:2007(E)THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2007 IEC,Geneva,Switzerland All rights reserved.Unless otherwise specified,no part of this public
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8、 this publication or need further assistance,please visit the Customer Service Centre FAQ or contact us:Email:csciec.ch Tel.:+41 22 919 02 11 Fax:+41 22 919 03 00 IEC 61892-7Edition 2.0 2007-11INTERNATIONAL STANDARD Mobile and fixed offshore units Electrical installations Part 7:Hazardous areas INTE
9、RNATIONAL ELECTROTECHNICAL COMMISSION XAICS 47.020.60 PRICE CODEISBN 2-8318-9393-3 2 61892-7 IEC:2007(E)CONTENTS FOREWORD.6 INTRODUCTION.8 1 Scope.9 2 Normative references.9 3 Terms and definitions.10 4 Area classification.15 4.1 General.15 4.2 Safety principles.16 4.3 Sources of release.16 4.4 Type
10、 of zone.17 4.5 Relative density of the gas or vapour when it is released.17 4.6 Mobile drilling units.17 4.6.1 Zone 0.18 4.6.2 Zone 1.18 4.6.3 Zone 2.18 4.6.4 Well test facilities.18 4.7 Fixed production units.18 4.7.1 Zone 0.19 4.7.2 Zone 1.19 4.7.3 Zone 2.19 4.7.4 Drilling facilities.19 4.8 Mobil
11、e production units.19 4.9 Provisions regarding mobile and fixed offshore units.20 4.10 Openings,access and ventilation conditions affecting the extent of hazardous areas.20 4.10.1 General.20 4.10.2 Enclosed space with direct access to any zone 1 location.20 4.10.3 Enclosed space with direct access t
12、o any zone 2 location.20 4.10.4 An enclosed space with direct access to any zone 1 location.20 4.10.5 Notices.21 5 Electrical systems.21 5.1 Sources of electrical power.21 5.2 Distribution systems.21 5.2.1 General.21 5.2.2 Earth fault detection.21 5.3 Electrical protection.21 5.4 Emergency condition
13、s due to drilling operations Mobile drilling units.22 5.5 Emergency switch-off Ignition source control Fixed production units.22 5.6 Protection from dangerous sparking.23 5.6.1 Dangers from live parts.23 5.6.2 Dangers from exposed and extraneous conductive parts.23 5.6.3 Potential equalization.24 5.
14、6.4 Static electricity.24 5.6.5 Lightning protection.24 5.6.6 Cathodically protected metallic parts.25 61892-7 IEC:2007(E)3 5.6.7 Electromagnetic radiation.25 5.7 Danger from rotating parts.25 6 Electrical equipment.25 6.1 General.25 6.2 Selection of electrical apparatus.25 6.2.1 Selection with resp
15、ect to area classification.25 6.2.2 Selection with respect to ignition temperature of the gas or vapour.25 6.2.3 Selection according to apparatus grouping.26 6.2.4 External influences.26 6.2.5 Ambient temperature.27 6.3 Electrical apparatus in hazardous areas.27 6.3.1 Equipment for zone 0.27 6.3.2 E
16、quipment for zone 1.27 6.3.3 Equipment for zone 2.27 6.3.4 Apparatus with multiple types of protection.28 6.4 Selection of apparatus not available in accordance with IEC standards.28 6.5 Portable apparatus.28 7 Installation.29 7.1 General.29 7.2 Selection of apparatus.29 7.3 Wiring system General.29 7.4 Connections.30 7.5 Unused openings.30 7.6 Circuits traversing a hazardous area.30 7.7 Unused cores.30 7.8 Cable surface temperature.30 7.9 Jointing.30 7.10 Cable wiring systems.31 7.11 Conduit sy
