IEC 61892-7:2019

Mobile and fixed offshore units - Electrical installations - Part 7: Hazardous areas

IEC 61892-7:2019

Name:IEC 61892-7:2019   Standard name:Mobile and fixed offshore units - Electrical installations - Part 7: Hazardous areas
Standard number:IEC 61892-7:2019   language:English and French language
Release Date:08-Apr-2019   technical committee:TC 18 - Electrical installations of ships and of mobile and fixed offshore units
Drafting committee:MT 18 - TC 18/MT 18   ICS number:01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION

IEC 61892-7
Edition 4.0 2019-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Mobile and fixed offshore units – Electrical installations –
Part 7: Hazardous areas
Unités mobiles et fixes en mer – Installations électriques –
Partie 7: Emplacements dangereux




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IEC 61892-7
Edition 4.0 2019-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Mobile and fixed offshore units – Electrical installations –

Part 7: Hazardous areas
Unités mobiles et fixes en mer – Installations électriques –

Partie 7: Emplacements dangereux

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 47.020.60 ISBN 978-2-8322-6672-4

– 2 – IEC 61892-7:2019 © IEC 2019
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 9
3 Terms and definitions . 9
4 Area classification . 15
4.1 General . 15
4.2 Safety principles . 17
4.3 Sources of release . 17
4.4 Type of zone . 18
4.5 Relative density of the gas or vapour when it is released . 18
4.6 Mobile offshore units . 19
4.6.1 General . 19
4.6.2 Zone 0 . 19
4.6.3 Zone 1 . 19
4.6.4 Zone 2 . 19
4.6.5 Well test facilities . 20
4.7 Fixed offshore units . 20
4.7.1 General . 20
4.7.2 Zone 0 . 20
4.7.3 Zone 1 . 20
4.7.4 Zone 2 . 21
4.7.5 Drilling facilities . 21
4.8 Buoyant production and storage units . 21
4.9 Provisions regarding all types of offshore units (fixed and mobile offshore
units) . 21
4.10 Openings, access and ventilation conditions affecting the extent of
hazardous areas . 21
4.10.1 General . 21
4.10.2 Enclosed space with direct access to any zone 1 location . 21
4.10.3 Enclosed space with direct access to any zone 2 location . 22
4.10.4 Warning notices . 22
5 Electrical systems . 22
5.1 Sources of electrical power . 22
5.2 Distribution systems . 22
5.2.1 General . 22
5.2.2 Earth fault detection . 23
5.3 Electrical protection . 23
5.4 Gas detection . 23
6 Protection from dangerous (incendive) sparking . 24
7 Assurance of conformity of equipment . 24
8 Selection of equipment (excluding cables and conduits) . 24
9 Cables and wiring system – General . 24
9.1 Cables . 24
9.2 Connections . 24
9.3 Splicing . 24

9.4 Cable system . 25
9.4.1 Construction . 25
9.4.2 Earthing of metallic covering . 25
9.5 Conduit systems . 25
9.6 Additional requirements . 25
9.7 Installation requirements . 25
9.7.1 Circuits traversing a hazardous area . 25
9.7.2 Terminations . 26
9.7.3 Unused cores . 26
10 Cable entry systems and blanking elements . 26
10.1 General . 26
10.2 Use of drain gland/plug . 26
11 Rotating electrical machines . 26
11.1 General . 26
11.2 Ex protected permanent magnet motor . 26
12 Luminaires . 27
13 Electric heating systems . 27
14 Additional requirements for type of protection "d" – Flameproof enclosures . 27
15 Additional requirements for type of protection "e" – Increased safety . 27
16 Additional requirements for type of protection "i" – Intrinsic safety . 27
17 Additional requirements for pressurized enclosures . 27
18 Pressurized rooms . 27
19 Analyser houses . 27
20 Additional requirements for type of protection "n" . 28
21 Additional requirements for type of protection "o"– Oil immersion . 28
22 Additional requirements for type of protection "q" – Powder filling .
...

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