BS IEC 61892-7:2019
$198.66
Mobile and fixed offshore units. Electrical installations – Hazardous areas
| Published By | Publication Date | Number of Pages |
| BSI | 2019 | 56 |
This part of IEC 61892 provides requirements for hazardous area classification and selection of electrical equipment and installation in hazardous areas in mobile and fixed offshore units, including pipeline, pumping or “pigging” stations, compressor stations and single buoy moorings, used in the offshore petroleum industry for drilling, production, accommodation, processing, storage and offloading purposes.
It applies to all installations, whether permanent, temporary, transportable or personal, to AC installations and DC installations without any voltage level limitation. Referenced equipment standards may give voltage level limitations.
This document is based on the requirements of International Standards developed by IEC TC 31 regarding area classification and requirements as to installations in hazardous areas and gives additional requirements for installations on mobile and fixed offshore units.
This document specifies requirements such as those concerning
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area classification,
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electrical systems,
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selection of electrical equipment,
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cables and wiring systems,
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ventilation,
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ventilation requirement for battery compartments, and
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inspection, maintenance, repair and overhaul.
This document gives information on topics such as
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gas detection systems, and
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electrical installations in extremely low ambient temperatures.
This document does not apply to
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fixed equipment for medical purposes,
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electrical installations of tankers, and
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control of ignition sources other than those created by electrical equipment.
For medical rooms, IEC 60364‑7‑710 provides specific requirements. Requirements for tankers are given in IEC 60092‑502 .
Guidance on protection of non-electrical equipment can be found in ISO 80079‑36 , ISO 80079‑37 and IMO 2009 MODU Code, 6.7
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | undefined |
| 4 | English CONTENTS |
| 7 | FOREWORD |
| 9 | INTRODUCTION |
| 10 | 1 Scope |
| 11 | 2 Normative references 3 Terms and definitions |
| 17 | 4 Area classification 4.1 General |
| 19 | 4.2 Safety principles 4.3 Sources of release |
| 20 | 4.4 Type of zone 4.5 Relative density of the gas or vapour when it is released |
| 21 | 4.6 Mobile offshore units 4.6.1 General 4.6.2 Zone 0 4.6.3 Zone 1 4.6.4 Zone 2 |
| 22 | 4.6.5 Well test facilities 4.7 Fixed offshore units 4.7.1 General 4.7.2 Zone 0 4.7.3 Zone 1 |
| 23 | 4.7.4 Zone 2 4.7.5 Drilling facilities 4.8 Buoyant production and storage units 4.9 Provisions regarding all types of offshore units (fixed and mobile offshore units) 4.10 Openings, access and ventilation conditions affecting the extent of hazardous areas 4.10.1 General 4.10.2 Enclosed space with direct access to any zone 1 location |
| 24 | 4.10.3 Enclosed space with direct access to any zone 2 location 4.10.4 Warning notices 5 Electrical systems 5.1 Sources of electrical power 5.2 Distribution systems 5.2.1 General |
| 25 | 5.2.2 Earth fault detection 5.3 Electrical protection 5.4 Gas detection Tables Table 1 – Electrical protection |
| 26 | 6 Protection from dangerous (incendive) sparking 7 Assurance of conformity of equipment 8 Selection of equipment (excluding cables and conduits) 9 Cables and wiring system – General 9.1 Cables 9.2 Connections 9.3 Splicing |
| 27 | 9.4 Cable system 9.4.1 Construction 9.4.2 Earthing of metallic covering 9.5 Conduit systems 9.6 Additional requirements 9.7 Installation requirements 9.7.1 Circuits traversing a hazardous area |
| 28 | 9.7.2 Terminations 9.7.3 Unused cores 10 Cable entry systems and blanking elements 10.1 General 10.2 Use of drain gland/plug 11 Rotating electrical machines 11.1 General 11.2 Ex protected permanent magnet motor |
| 29 | 12 Luminaires 13 Electric heating systems 14 Additional requirements for type of protection “d” – Flameproof enclosures 15 Additional requirements for type of protection “e” – Increased safety 16 Additional requirements for type of protection “i” – Intrinsic safety 17 Additional requirements for pressurized enclosures 18 Pressurized rooms 19 Analyser houses |
| 30 | 20 Additional requirements for type of protection “n” 21 Additional requirements for type of protection “o”– Oil immersion 22 Additional requirements for type of protection “q” – Powder filling 23 Additional requirements for type of protection “m” – Encapsulation 24 Additional requirements for type of protection “op” – Optical radiation 25 Ventilation 25.1 General 25.2 Ventilation of spaces containing electrical apparatus |
| 31 | 25.3 Ventilation of other hazardous spaces 26 Ventilation requirements for battery compartments 26.1 General 26.2 Ventilation requirements |
| 32 | 26.3 Natural ventilation 26.4 Forced ventilation 26.5 Requirements for battery compartments for zone 2 and zone 1 26.6 Fans and ducts |
| 33 | 27 Inspection, maintenance, repair and overhaul 27.1 Initial inspection 27.2 Inspection and maintenance 27.3 Isolation of apparatus 27.4 Precautions concerning the use of ignition sources 27.5 Repair and overhaul 27.6 Personnel qualifications |
| 34 | 28 Documentation |
| 36 | Annexes Annex A (informative) Examples of sources of release –Process plant A.1 General A.2 Sources giving a continuous grade of release A.3 Sources giving a primary grade of release A.4 Sources giving a secondary grade of release |
| 37 | Annex B (informative) Schematic approach to the classification of hazardous areas Figures Figure B.1 – Schematic approach to area classification |
| 38 | Figure B.2 – Schematic approach to area classification for continuous grade release |
| 39 | Figure B.3 – Schematic approach to classification for primary release source |
| 40 | Figure B.4 – Schematic approach to area classification for secondary grade release |
| 41 | Annex C (informative) Hazardous area data sheets and symbols C.1 Hazardous area classification data sheet C.2 Symbols for hazardous area zone classification drawings |
| 42 | Table C.1 – Hazardous area classification data sheet – Part I: Flammable substance list and characteristics |
| 43 | Table C.2 – Hazardous area classification data sheet – Part II: List of sources of release |
| 44 | Figure C.1 – Preferred symbols for hazardous area zones (1 of 2) |
| 46 | Annex D (informative) Gas detection systems D.1 General D.2 Low gas alarm |
| 47 | D.3 High gas alarm |
| 48 | Annex E (informative) Ventilation of hazardous areas – Requirements as to ventilation |
| 49 | Annex F (informative) Electrical installations in extremely low ambient temperatures F.1 General F.2 Explosion protected equipment |
| 50 | Annex G (informative) Installation in explosive atmospheres –Safety signs and plates for hazardous areas G.1 Objectives G.2 General |
| 51 | Figure G.1 – Examples of an “Ex” safety warning sign for hazardous area installation |
| 52 | Annex H (informative)List of electrical and electronic equipment in hazardous areas(example of data file) – Requirements concerning data file |
| 53 | Bibliography |
