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Railway applications - Fixed installations - High voltage AC switchgear and transformers - Part 4: Voltage transformers
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Basic data
| Standard ID | GB/T 32580.4-2026 (GB/T32580.4-2026) |
| Description (Translated English) | Railway applications - Fixed installations - High voltage AC switchgear and transformers - Part 4: Voltage transformers |
| Sector / Industry | National Standard (Recommended) |
| Classification of Chinese Standard | S81 |
| Classification of International Standard | 29.280 |
| Word Count Estimation | 26,262 |
| Date of Issue | 2026-02-27 |
| Date of Implementation | 2026-06-01 |
| Older Standard (superseded by this standard) | GB/T 32580.303-2016 |
| Issuing agency(ies) | State Administration for Market Regulation, Standardization Administration of China |
GB/T 32580.4-2026: Railway applications - Fixed installations - High voltage AC switchgear and transformers - Part 4: Voltage transformers
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 29.280
CCSS81
National Standards of the People's Republic of China
Replaces GB/T 32580.303-2016
Rail Transit Ground Equipment
High-voltage AC switchgear and instrument transformers
Part 4.Voltage Transformers
(IEC 62505-3-3.2020,Railwayapplications-Fixedinstalations-
Released on February 27, 2026; to be implemented on June 1, 2026.
State Administration for Market Regulation
The State Administration for Standardization issued a statement.
Table of contents
Preface III
Introduction V
1.Scope 1
2 Normative References 1
3.Terms and Definitions 1
4.Normal and Special Usage Conditions 2
4.1 Normal operating conditions 2
4.2 Special Usage Conditions 3
5 Rated value 3
5.1 Overview 3
5.2 Rated Voltage (Ur) 4
5.3 Nominal Voltage (Un) 4
5.4 Rated Insulation Levels (Ud and Up) 4
5.5 Rated Frequency (fr) 5
5.6 Rated Output 5
5.7 Rated accuracy class 5
5.8 Rated primary voltage standard value 7
5.9 Rated secondary voltage standard value 7
5.10 Rated voltage factor standard value 7
5.11 Ferromagnetic Resonance 7
6.Design and Structure 8.
6.1 Requirements for the liquid used in the equipment 8
6.2 Requirements for solid materials used in the equipment 8
6.3 Temperature rise requirements for parts and components 8
6.4 Equipment grounding requirements 8
6.5 External insulation reference uniform creepage distance 8
6.6 Enclosure protection rating 8
6.7 Corrosion 8
6.8 Mark 8
6.9 Fire Hazard 9
6.10 Requirements for outgoing terminals 9
6.11 Structural Requirements 9
6.12 Insulating oil performance requirements 9
6.13 Short circuit withstand capability 10
6.14 Sealing performance 10
6.15 Mechanical strength requirement 10
6.16 Transmitted overvoltage 10
7.Test Methods 10
7.1 Type testing 10
7.2 Factory Test 11
7.3 Special Test 12
8.Inspection Rule 12
8.1 Inspection Classification 12
8.2 Factory Inspection 12
8.3 Type Testing 12
8.4 Special Inspection 13
8.5 Inspection Item 13
9.Information provided during inquiries, bidding, and ordering 14
10 Rules for Transportation, Storage, Installation, Operation and Maintenance 14
11 Safety 14
12.Environmental impact of the product 14.
Appendix A (Informative) Summary Table of Structural Numbering Changes 15
Appendix B (Normative) 16 Documents Accompanying the Product
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 4 of GB/T 32580 "High-voltage AC switchgear and instrument transformers for ground installations in rail transit".
GB/T 32580 has published the following parts.
---Part 1.Circuit Breakers;
---Part 2.Disconnecting switches, grounding switches, and load switches;
---Part 3.Current Transformers;
---Part 4.Voltage Transformers;
---Part 5.27.5kV and 2×27.5kV metal-enclosed switchgear and controlgear.
This document replaces GB/T 32580.303-2016 "Special Requirements for AC Switchgear on Ground Installations of Rail Transit - Part 3-3"
Section. "Single-phase Inductive Voltage Transformer for Dedicated Measurement, Control and Protection Devices of AC Traction Systems", related to GB/T 32580.303-2016
Compared to previous versions, aside from structural adjustments and editorial changes, the main technical changes are as follows.
a) The scope has been changed (see Chapter 1, Chapter 1 of the.2016 edition);
b) Terms and definitions have been changed (see Chapter 3, Chapter 3 of the.2016 edition);
c) Changes have been made to the normal and special usage conditions (see Chapter 4, Chapter 4 of the.2016 edition);
d) Features and applications have been removed (see Chapter 5 of the.2016 edition);
e) Rated voltage and nominal voltage have been added (see 5.2 and 5.3);
f) The rated insulation level has been changed (see 5.4, Chapters 6 and 7 of the.2016 edition);
g) The ferromagnetic resonance was modified (see 5.11, Chapter 8 of the.2016 edition);
h) Added requirements for liquids used in the equipment, requirements for solid materials used in the equipment, unified reference creepage distance for external insulation, corrosion, and fire.
Hazards, structural requirements for resin-cast voltage transformers, insulating oil performance requirements, short-circuit withstand capability, sealing performance, and mechanical strength requirements.
Please find the answers in sections 6.1, 6.2, 6.5, 6.7, 6.9, 6.11.2, and 6.12-6.15.
i) Changes were made to the equipment's grounding requirements, enclosure protection rating, nameplate, transmitted overvoltage requirements, and wet testing of outdoor current transformers (see...).
(6.4, 6.6, 6.8, 6.16, 7.1.3, Chapter 9 of the.2016 edition);
j) The test methods have been changed (see Chapter 7, Chapters 10 and 11 in the.2016 edition);
k) Added inspection rules (see Chapter 8);
l) Added information provided during inquiries, bidding, and ordering (see Chapter 9);
m) Added rules for transportation, storage, installation, operation, and maintenance (see Chapter 10);
n) Enhanced security (see Chapter 11);
o) Increased the product's environmental impact (see Chapter 12);
p) Additional documentation has been added to accompany the product (see Appendix B).
This document is modified to adopt IEC 62505-3-3.2020 "Particular requirements for AC switchgear on ground installations for rail transit - Part 3-3".
Part. Voltage transformers for AC traction system-specific measurement, control, and protection devices.
This document has undergone significant structural adjustments compared to IEC 62505-3-3.2020.A comparison of the structural numbering changes between the two documents is provided below.
See Appendix A for the table of contents.
The technical differences between this document and IEC 62505-3-3.2020, and the reasons therefor, are as follows.
---The scope has been revised (see Chapter 1) to suit my country's technical conditions and facilitate the use of the standard;
---Added provisions to GB/T 2900.1, GB/T 2900.19, GB/T 2900.20 (see Chapter 3) and GB/T 7595-2017 (see Chapter 3).
6.12), GB/T 26218.1-2010 (see 4.1.4), GB/T 32580.5 (see 6.4, 6.5), TB/T 2805-2021 (see
The normative references in 6.5) have been removed from IEC 62505-3-3.2020, specifically IEC 60850.2014 and IEC 62497.
1.2010, to adapt to my country's technological conditions and increase operability;
---Terminology and definitions have been changed, and the abbreviations in section 3.2 of IEC 62505-3-3.2020 (see Chapter 3) have been removed to adapt to my country's technical conditions.
Components that facilitate standard use;
---The normal and special usage conditions have been changed (see Chapter 4) to facilitate standard use;
---The ratings have been changed (see Chapter 5) to facilitate standard use;
---The design and structure have been modified (see Chapter 6) to facilitate standard use;
---The test methods have been modified (see Chapter 7) to facilitate the use of the standard;
---Inspection rules have been added (see Chapter 8) to facilitate the use of the standard;
---A normative appendix, "Documents Accompanying the Product" (see Appendix B), has been added to facilitate the use of the standard.
The following editorial changes have been made to this document.
---To align with my country's standards system, the title of this document has been changed to "High-voltage AC switchgear and mutual inductors for ground installations in rail transit".
Part 4.Voltage Transformers;
---Appendix A (informative) "Comparison Table of Structural Numbering Changes" has been added;
---References have been removed.
Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents.
This document was proposed by the National Railway Administration.
This document is under the jurisdiction of the National Technical Committee on Standardization of Rail Transit Electrical Equipment and Systems (SAC/TC278).
This document was drafted by. China Railway Fourth Survey and Design Institute Group Co., Ltd., China Railway Electrification Bureau Group Co., Ltd., and China Railway Design Corporation.
Group Co., Ltd., China Railway Electrification Survey and Design Institute Co., Ltd., CRRC Yongji Electric Co., Ltd., Shenyang Instrument Transformer Co., Ltd.
company.
The main drafters of this document are. Wang Lin, Gao Liming, Li Jinjun, Wang Rongxi, Wang Qi, Sang Zijie, Gao Chuang, and Lin Guiwen.
The release history of this document and the document it replaces is as follows.
---First published in.2016 as GB/T 32580.303-2016;
Introduction
GB/T 32580 "High-voltage AC switchgear and instrument transformers for ground installations in rail transit" aims to ensure the traction power supply system of rail transit.
To improve the product quality of major equipment, ensure transportation safety, meet the development needs of the railway industry, promote standardization, and align with international market standards, it is proposed to...
It consists of five parts.
---Part 1.Circuit Breakers. The purpose is to specify the requirements for application and environmental conditions, including ratings, design, manufacture, and type.
The document outlines requirements for testing and factory testing, and specifies rules for transportation, storage, installation, operation, and maintenance, as well as safety and the product's environmental impact.
The document provides guidance on the impacts of various factors, offering suggestions for the design, manufacture, and use of 27.5kV, 2×27.5kV, and 55kV AC circuit breakers.
Standards and basis.
---Part 2.Disconnecting Switches, Grounding Switches, and Load Switches. The purpose is to specify the scope of use and environmental requirements, from...
Requirements are specified for rated values, design and manufacturing, type testing, and factory testing. A selection guide for disconnecting switches is also provided, which should be included with the order.
The documents provided together with the tender and inquiry form, as well as the rules for transportation, storage, installation, operation and maintenance, safety, and the product's environmental impact, are required.
The document provides guidance on the impact of various factors, including the requirements for 27.5kV, 2×27.5kV, and 55kV AC disconnect switches, grounding switches, and load switches.
It provides standards and guidelines for the design, manufacture, and use of related components.
---Part 3.Current Transformers. The purpose is to specify the requirements for application and environmental conditions, including ratings, design, and manufacturing.
Type testing and factory testing requirements are specified, along with the documents provided with the purchase order, tender, and inquiry form, as well as transportation details.
It provides guidance on transmission, storage, installation, operation and maintenance rules, safety, and the environmental impact of products, for 27.5kV and
This provides standards and guidelines for the design, manufacture, and use of 55kV AC current transformers.
---Part 4.Voltage Transformers. The purpose is to specify the requirements for application and environmental conditions, including ratings, design, and manufacturing.
Type testing and factory testing requirements are specified, along with the documents provided with the purchase order, tender, and inquiry form, as well as transportation details.
It provides guidance on transmission, storage, installation, operation and maintenance rules, safety, and the environmental impact of products, for 27.5kV and
This provides standards and guidelines for the design, manufacture, and use of 55kV AC voltage transformers.
---Part 5.27.5kV and 2×27.5kV Metal-Enclosed Switchgear and Controlgear. The purpose is to specify AC metal-enclosed...
Operating conditions, ratings, design and structure, type tests, factory tests, inspection rules, and operation of switchgear and control equipment.
Rules for transmission, storage, installation, operation and maintenance, and security requirements.
Rail Transit Ground Equipment
High-voltage AC switchgear and instrument transformers
Part 4.Voltage Transformers
1 Scope
This document specifies the normal and special operating conditions, rated values, design and structure, inspection rules, and inspection procedures for voltage transformers used in rail transit.
Information provided during inquiries, tenders, and orders; rules for transportation, storage, installation, operation, and maintenance; safety; the product's environmental impact; and descriptions of relevant details.
Experimental methods.
This document applies to AC voltage transformers with an operating frequency of 50Hz and rated voltages of 27.5kV and 55kV.
Note. Voltage transformers are mainly used in measuring devices and protection equipment.
2 Normative references
The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.
For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.
This document.
GB/T 2900.1 Basic Terminology for Electrical Engineering
GB/T 2900.19 Electrical Terminology. High Voltage Testing Techniques and Insulation Coordination
GB/T 2900.20 Electrical Terminology - High Voltage Switchgear and Controlgear (GB/T 2900.20-2016, IEC 60050-441)
1984, MOD)
GB/T 7595-2017 Quality of Transformer Oil in Operation
GB/T 20840.1-2010 Instrument Transformers - Part 1.General Technical Requirements (IEC 61869-1.2007, MOD)
Note. The content referenced in GB/T 20840.1-2010 has no technical differences from the content referenced in IEC 61869-1.2007.
GB/T 20840.3-2013 Instrument Transformers - Part 3.Supplementary Technical Requirements for Electromagnetic Voltage Transformers (IEC 61869-3)
2011, MOD)
Note. There are no technical differences between the content referenced in GB/T 20840.3-2013 and the content referenced in IEC 61869-3.2011.
GB/T 26218.1-2010 Selection and sizing determination of high-voltage insulators for use under polluted conditions - Part 1.Definitions and information
And general principles (IEC /T S60815-1.2008, MOD)
GB/T 32580.5 High-voltage AC switchgear and instrument transformers for ground installations in rail transit - Part 5.27.5kV and 2×
27.5kV metal-enclosed switchgear and control equipment
TB/T 2805-2021 Insulation Level of Traction Power Supply Equipment
3 Terms and Definitions
Except for sections 3.2.1 to 3.2.9 of GB/T 20840.1-2010, GB/T 2900.1, GB/T 2900.19 and
The terms and definitions defined in GB/T 2900.20 apply to this document.
...
