GB/T 25444.3-2023Mobile and fixed offshore units - Electrical installations - Part 3: Equipment (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 3 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 25444.3-2010 "Electrical installations for mobile and fixed offshore installations - Part 3: Equipment" and is consistent with Compared with GB/T 25444.3-2010, in addition to structural adjustments and editorial changes, the main technical changes are as follows:

a) The voltage limit of "AC voltage not greater than 35000V and DC voltage not greater than 750V" has been deleted from "Scope" (see Chapter 1, Chapter 1 of the:2010 edition);

b) Change "General Provisions" to "General Requirements" and make general provisions on related electrical equipment (see Chapter 4,:2010 edition Chapter 4);

c) Change "power and lighting transformers" to "transformers", add "non-sealed liquid-immersed (oil-immersed) transformers", and delete "parallel operation" "Exercise" and "Experiment" (see Chapter 6, Chapter 6 of the:2010 edition);

d) Changed the relevant requirements for "switchgear and control equipment combinations" (see Chapter 7, Chapter 7 of the:2010 edition);

e) Delete the requirements related to "internal windings", "accessibility" and "diagrams" (see 8.2, 8:4 and 8:7 of the:2010 edition);

f) Deleted the specific requirements for "lighting fixtures" (see Chapter 10 of the:2010 edition);

g) Deleted the specific requirements for "electric heaters and electric cookers" (see Chapter 11 of the:2010 edition);

h) The chapter "Underwater Systems and Equipment" has been deleted (see Chapter 14 of the:2010 edition):

This document is modified to adopt IEC 61892-3:2019 "Electrical installations for mobile and fixed offshore installations - Part 3: Equipment":

The technical differences between this document and IEC 61892-3:2019 and their reasons are as follows:

---Replace IEC 61439-2:2011 with normatively quoted GB/T 7251.2-2023 (see 7.4:1, 7:4:4:1, 7:4:4:2, 14:2), to ensure that the normative reference documents are the latest version;

---The "general requirements" of "design verification" were changed from required clauses to recommended clauses (see 7.4:4:1) to ensure the applicability of the standard in our country responsiveness;

---Deleted the normative references in 6:1 of IEC 61892-3:2019 IEC 60146-1-3 and the normative references in Chapter 12 IEC 60519-10, as these two standards have been abolished and have not been replaced by any standard:

The following editorial changes have been made to this document:

---A note was added in 4:7:4 that "the identification of three-phase busbars is distinguished by different color codes";

---A note was added in 4:7:5 "The markings of the DC bus are distinguished by different color scales (positive brown, negative blue): For example: positive brown scale Marked as 'BK', negative blue is marked as 'BU'":

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

This document is under the jurisdiction of the National Standardization Technical Committee for Ship Electrical and Electronic Equipment (SAC/TC531):

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 3: Equipment

1 Scope

This document specifies the following requirements for electrical equipment:

a) Enclosure, regarding component material, identification (nameplate and nameplate), ventilation, grounding, electromagnetic compatibility and short-circuit rating:

b) Specific requirements for devices related to offshore installations, such as:

1) Generators and electric motors;

2) Transformer;

3) Switchgear and control equipment combinations;

4) Power supply instrumentation;

5) Semiconductor converter;

6) Batteries and battery packs;

7) Lamps;

8) Communication equipment;

9) Control and measuring instruments;

10) Apparatus for use in accommodation compartments and similar areas:

This document applies to electrical equipment for mobile and fixed offshore installations, including drilling, production, accommodation, processing and Pipelines for construction, oil storage and unloading, pumping stations or pipeline cleaning stations, air compressor stations and single buoy mooring facilities:

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 controlled by electrical equipment:

Note 1: For specific requirements regarding medical offices, see IEC 60364-7-710: The relevant requirements for tankers are found in IEC 60092-502:

Note 2: See IEC 61892-7 for specific requirements related to electrical equipment in hazardous areas:

Note 3: For guidance on the protection of non-electrical equipment, see ISO 80079-36, ISO 80079-37 and 6:7 of the IMO2009 MODU rules:

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:

GB/T 3906-2020 3:6kV~40:5kV AC metal-enclosed switchgear and control equipment (IEC 62271-200:

2011,MOD)

Note: There is no technical difference between the quoted content of GB/T 3906-2020 and the quoted content of IEC 62271-200:2011:

GB/T 7251.1-2023 Low-voltage switchgear and control equipment Part 1: General provisions (IEC 61439-1:2020, IDT) Note: There is no technical difference between the quoted content of GB/T 7251.1-2023 and the quoted content of IEC 61439-1:2011: