GB/T 25444.5-2023Mobile and fixed offshore units - Electrical installations - Part 5: Mobile units (English PDF)

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents" Drafting:

This document is Part 5 of GB/T 25444 "Electrical Installations for Mobile and Fixed Offshore Installations": GB/T 25444 has been issued the following parts have been published:

---Part 1: General requirements and conditions;

---Part 2: System Design;

---Part 3: Equipment;

---Part 5: Mobile facilities;

---Part 6: Installation;

---Part 7: Hazardous areas:

This document replaces GB/T 25444.5-2010 "Electrical installations for mobile and fixed offshore installations - Part 5: Mobile installations", Compared with GB/T 25444.5-2010, in addition to structural adjustments and editorial changes, the main technical changes are as follows:

a) The applicable limits of the scope have been changed (see Chapter 1, Chapter 1 of the:2010 edition);

b) Changes in terms and definitions (see Chapter 3, Chapter 3 of the:2010 edition);

c) Added requirements for ambient temperature, main switchboard and emergency switchboard handrails (see 4.1, 4:5 and 4:6), and changed waterproof requirements (See 4.2, 4:1 of the:2010 edition);

d) Changed the requirements for facility inclination limits (see Chapter 5, Chapter 5 of the:2010 edition);

e) Obstruction light requirements and special requirements for the use of LED lights have been added (see 7.2 and 7:5), and navigation light power supply and monitoring system requirements have been changed:

Seek (see 7.4,:2010 version of 7:5);

f) The requirements for the rated working system have been changed (see 8.2:3, 8:2:4, 8:2:2:1, 8:2:2:2 of the:2010 edition); the motor starter has been changed Requirements (see 8.3,:2010 version of 8:3);

g) Changed the technical requirements for electric propulsion (see Chapter 9, Chapter 9 of the:2010 edition);

h) The DC propulsion system requirements are deleted (see 9.7:2:2 of the:2010 version);

i) Added requirements for verification of dynamic positioning enhancement systems (see Chapter 10);

j) The requirements for control and indication systems have been changed (see 11.3,:2010 version of 11:3), and the requirements for waterproofing of ballast systems have been added (see 11.5);

k) The requirements for lifting systems have been changed (see Chapter 12, Chapter 12 of the:2010 edition);

l) The requirements for propeller auxiliary mooring systems have been changed (see 13.4,:2010 version of 13:4):

This document is equivalent to IEC 61892-5:2019 "Electrical installations of mobile and fixed offshore installations - Part 5: Mobile installations":

This document has made the following minimal editorial changes:

---Additional information added in 3:1 and 3:5:

Please note that some content in this document may be subject to patents: The publisher of this document assumes no responsibility for identifying patents:

Introduction

GB/T 25444 "Electrical Installations for Mobile and Fixed Offshore Facilities" aims to cover general requirements, system design, equipment, cables, mobile Facilities, installation and hazardous areas, etc:, proposed designs for electrical equipment in mobile and fixed offshore facilities used for petroleum exploration or extraction:

Design, installation, maintenance and use requirements, applicable to pipelines, pumping stations or pipelines for drilling, production, accommodation, processing, oil storage and unloading in the offshore oil industry in-tube cleaning station, air compressor station and single buoy mooring facility:

GB/T 25444 is planned to consist of seven parts:

---Part 1: General requirements and conditions: The purpose is to provide for mobile and fixed offshore installations used for petroleum exploration or extraction General requirements for electrical installations:

---Part 2: System Design: The purpose is to specify systems for mobile and fixed offshore installations used in petroleum exploration or extraction Design requirements:

---Part 3: Equipment: The purpose is to specify the design of equipment for mobile and fixed offshore installations used in petroleum exploration or extraction:

and testing requirements:

---Part 4: Cables: The purpose is to provide for the electrical installation of mobile and fixed offshore installations used in petroleum exploration or extraction:

Cable selection requirements:

---Part 5: Mobile facilities: The purpose is to provide for the electrical Additional features of the device:

---Part 6: Installation: The purpose is to provide for the electrical installation of mobile and fixed offshore installations used in petroleum exploration or extraction:

installation requirements:

---Part 7: Hazardous areas: The purpose is to regulate the hazards of mobile and fixed offshore installations used for petroleum exploration or extraction:

Area classification and selection requirements for electrical equipment in hazardous areas:

GB/T 25444 aims to form a series of standards applicable to electrical equipment in the offshore petroleum industry, but is not limited to petroleum equipment:

use:

Electrical installations for mobile and fixed offshore installations Part 5: Mobile facilities

1 Scope

This document specifies additional characteristics for electrical installations on mobile installations:

This document specifies the following requirements:

---Environmental conditions;

---Tilt limits of equipment that need to be operated on the facility;

---Bilge pump;

---Navigation lights and obstruction lights;

---Servo;

---Ballast system;

---Lifting system;

---Mooring system:

For electric propulsion systems, refer to IEC 60092-501:

For dynamic positioning systems, refer to the relevant requirements of the International Maritime Organization (IMO):

This document applies to mobile facilities such as column-stabilized facilities (semi-submersible facilities), ship- or barge-mounted floating facilities and jack-up facilities:

This document specifies additional characteristics of facilities used for drilling, production, accommodation, processing, storage and offloading that can be moved from one location Move to another place:

This document applies to all permanent, temporary, mobile or handheld AC and DC installations, regardless of voltage level: ginseng the equipment standards may provide voltage level restrictions:

This document does not apply to the following devices:

---Medical fixed electrical devices;

---Electrical installation of liquid cargo ship;

--- Ignition source control equipment other than ignition sources generated by electrical equipment:

Note 1: IEC 60364-7-710 has specific requirements for medical rooms: The requirements for oil tankers are found in IEC 60092-502:

Note 2: Guidance on the protection of non-electrical equipment is found in ISO 80079-36, ISO 80079-37 and 6:7 of the IMO2009 MODU rules:

Note 3: Pay attention to the further requirements for electrical installations of such mobile offshore facilities in the IMO2009 MODU regulations:

2 Normative reference documents

The contents of the following documents constitute essential provisions of this document through normative references in the text: Among them, the dated quotations for undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document:

performance)

Note: GB/T 755-2019 Ratings and performance of rotating electrical machines (IEC 60034-1:2017, IDT)