GB/T 32580.2-2026Railway applications - Fixed installations - High voltage AC switchgear and transformers - Part 2: Disconnectors, earthing switches and switches (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 2 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 32580.2-2016 "Special Requirements for AC Switchgear for Ground Installations in Rail Transit - Part 2.

The standard for "Single-phase disconnecting switches, grounding switches and load switches with voltage greater than 1kV" has been revised compared to GB/T 32580.2-2016, except for structural adjustments and rewriting.

Aside from the logical changes, the main technical changes are as follows.

a) Changes have been made to the normal and special usage conditions (see Chapter 4, Chapter 4 of the 2016 edition);

b) The overview, rated voltage, nominal voltage, and rated insulation level have been revised (see 5.1 to 5.4, 2016 edition of 5.1 to 5.4);

c) Added classifications for rated active load breaking current, short-circuit making capacity, rated terminal static mechanical load, and mechanical life.

Rated icing thickness (see 5.7, 5.19, 5.20, 5.21 and 5.22);

d) The rated cable charging breaking current, rated line charging breaking current, rated short-time withstand current, and rated peak withstand current were changed.

Current, rated short-circuit duration (see 5.8~5.12, 5.8, 5.9.3, 5.5, 5.6 and 5.7 of the 2016 edition);

e) The matching of the rated values has been removed (see 5.11 in the 2016 edition);

f) The interruption requirements for no-load transformers have been changed (see 5.18, 5.9.1 and 5.9.2 in the 2016 version);

g) Modifications were made to the grounding, power operation, nameplate, interlocking devices, enclosure protection rating, and external insulation of disconnecting switches, grounding switches, and load switches.

The creepage distance should be consistent with the unified standard, specific requirements for grounding switches, and mechanical strength (see 6.3, 6.5, 6.11, 6.12, 6.14, 6.15).

(6.23 and 6.25, Chapter 6 of the 2016 edition);

h) Added requirements for post insulators, terminals, mechanical transmission systems, asynchrony of closing, circuit resistance, and connection.

Special requirements for the electric operating mechanism of the overhead contact line disconnector, control device for the overhead contact line electric disconnector, design inspection and appearance inspection (See 6.30~6.37);

i) The test voltage has been changed (see 7.2.1, 7.2 in the 2016 version);

j) The continuous current test, operational and mechanical life test have been modified (see 7.2.3, 7.2.12, and 7.1 in the 2016 version);

k) The test voltage and mechanical operation test in an air environment have been removed from the type testing (see 7.2 and 7.3 in the 2016 version);

l) Added inspection rules, selection guidelines, and information provided during inquiries, bidding, and ordering; and improved procedures for marking, packaging, transportation, storage, installation, and handling.

Operating and maintenance rules, safety, and the product's environmental impact (see Chapters 8-13);

m) Added accompanying documentation (see Appendix B);

n) General technical requirements for the control device of the electric disconnecting switch of the overhead contact line have been added (see Appendix C).

This document is modified to adopt IEC 62505-2:2016 "Particular requirements for AC switchgear on ground installations for rail transit - Part 2." Disconnecting switches and grounding switches with a nominal voltage greater than 1kV.

This document has undergone several structural adjustments compared to IEC 62505-2:2016.A table comparing the structural numbering of the two documents can be found here.

Appendix A.

The technical differences between this document and IEC 62505-2:2016, 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;

---The following normative references have been removed. IEC 60850:2014 (see 5.2, 5.3), IEC 62497-1:2010 (see 6.15), and IEC 62498-2.

2010 (see Chapter 4), IEC 62505-1:2016 (see 5.4), and added GB/T 772 (see 6.30) and GB/T 2900.1 (see Chapter 3), GB/T 2900.19 (see Chapter 3), GB/T 2900.20 (see Chapter 3), GB/T 4208-2017 (see 6.14), 6.35, C.1.3.2.5, C.1.3.2.6, C.3.11), GB/T 4796.1 (see 4.3.8), GB/T 4797 (all parts) (see 4.3.8).

GB/T 4798 (all parts) (see 4.3.8), GB/T 5273 (see 6.31), GB/T 5465.2-2023 (see 6.3), GB/T 7261-2016 (see C.1.3.4.2, C.1.3.4.3, C.1.3.5, C.3.1~C.3.3, C.3.5, C.3.6.1, C.3.6.2), GB/T 8287.1 (see 6.30), GB/T 8287.2 (see 6.30), GB/T 11920-2008 (see C.3.1, C.3.4, C.3.7) GB/T 16935.1-2023 (see 4.3.2), GB/T 17626.2-2018 (see C.1.3.6.2, C.3.8.2), GB/T 17626.3-2023 (see C.1.3.6.3, C.3.8.3), GB/T 17626.4-2018 (see C.1.3.6.1, C.3.8.1) GB/T 17626.5-2019 (see C.1.3.6.6, C.3.8.6), GB/T 17626.8-2006 (see C.1.3.6.5, C.3.8.5) GB/T 17626.11-2023 (see C.1.3.6.7, C.3.8.7), GB/T 17626.12-2023 (see C.1.3.6.4, C.3.8.4) GB/T 32580.5 (see 6.3, 6.15), DL/T 634.5101 (see C.1.3.2.2), DL/T 634.5104 (see C.1.3.2.2).

DL/T 860 (all parts) (see C.1.3.2.2) and TB/T 2805-2021 (see 4.1.1, 4.1.2, 4.3.3, 6.15) to adapt to Given my country's technological capabilities, this increases operability;

---The presentation of terms and definitions has been changed from listing terms to listing relevant terminology standards (see Chapter 3) to better suit my country's technological needs.

Conditions to 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;

---A normative appendix, "Control Device for Electric Disconnect Switches of Overhead Contact Lines" (see Appendix C), 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 2: Disconnecting switches, grounding switches and load switches.

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).

Introduction

In rail transit traction power supply systems, circuit breakers, disconnecting switches (grounding switches, load switches), current transformers, voltage transformers, etc.

It is an indispensable piece of equipment, widely used, produced in large quantities, and closely related to the reliable operation of transportation organizations. Through years of experience, this...

These products have mature manufacturing technology and are fully adapted to the special requirements of traction power supply systems in terms of operating environment, insulation coordination, and protection settings.

Require.

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 marking, packaging, transportation, storage, installation, operation and maintenance, and safety, the guidelines provide information on the environmental impact of products, including 27.5kV, 2×27.5kV and 55kV AC disconnect switches and grounding switches.

It provides standards and guidelines for the design, manufacture, and use of switchgear and load switches.

---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.

High-voltage AC switch for rail transit ground equipment Equipment and Instrument Transformers Part 2: Disconnect Switches Grounding switch and load switch

1 Scope

This document specifies the normal and special operating conditions for high-voltage AC disconnect switches, grounding switches, and load switches used in rail transit, and their rated values.

Values, design and structure, inspection rules, selection guidelines, information provided during inquiry, bidding and ordering, marking, packaging, transportation, storage, installation, and handling.

The regulations cover operation and maintenance, safety, and the product's environmental impact, and describe the test methods for initial testing and type testing.

This document applies to AC disconnect switches and grounding systems operating at 50Hz with rated voltages of 27.5kV, 2×27.5kV, and 55kV.

Switches and load switches.

This document also applies to the operating mechanisms and auxiliary equipment of disconnecting switches, grounding switches, and load switches, as well as the control systems of electric disconnecting switches for overhead contact lines.

Manufacturing device.

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 772 Technical requirements for porcelain components of high voltage insulators GB/T 1985-2023 High-voltage AC disconnecting switches and grounding switches (IEC 62271-102:2022, MOD) Note. There are no technical differences between the content referenced in GB/T 1985-2023 and the content referenced in IEC 62271-102:2022.

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 3804-2017 3.6kV~40.5kV High Voltage AC Load Switch (IEC 62271-103:2011, MOD) Note. There are no technical differences between the content referenced in GB/T 3804-2017 and the content referenced in IEC 62271-103:2011.

GB/T 4208-2017 Degrees of protection provided by enclosures (IP code) GB/T 4796.1 Classification of Environmental Conditions Part 1: Environmental Parameters and Their Severity (GB/T 4796.1-2017) IEC 60721-1:2002 (IDT) GB/T 4797 (all parts) Classification of Environmental Conditions - Natural Environmental Conditions [IEC 60721-2 (all parts)] Note. GB/T 4797.1-2018 Classification of Environmental Conditions - Natural Environmental Conditions - Temperature and Humidity (IEC 60721-2-1:2013, MOD);

GB/T 4797.2-2017 Classification of Environmental Conditions - Natural Environmental Conditions - Atmospheric Pressure (IEC 60721-2-3:2013, IDT);

GB/T 4797.3-2024 Classification of Environmental Conditions – Natural Environmental Conditions – Part 3: Living Things (IEC 60721-2-7:2018, MOD);

GB/T 4797.4-2019 Classification of Environmental Conditions - Natural Environmental Conditions - Solar Radiation and Temperature (IEC 60721-2-4:2002, IDT);

GB/T 4797.5-2017 Classification of Environmental Conditions - Natural Environmental Conditions - Precipitation and Wind (IEC 60721-2-2:2012, IDT);

GB/T 4797.6-2013 Classification of Environmental Conditions - Natural Environmental Conditions (Dust, Sand, Salt Spray) (IEC 60721-2-5:1991, MOD);

GB/T 4797.7-2008 Classification of Environmental Conditions for Electrical and Electronic Products - Natural Environmental Conditions - Seismic Vibration and Shock (IEC 60721-2-6) 1990, IDT);