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GB/T 42321-2023Additional requirements for internal arc classified pole-mounted metal-enclosed switchgear for rated voltages above 3.6 kV and up to and including 40.5 kV (English PDF)

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Issued by

State Administration for Market Regulation, China National Standardization Administration

Level / Type

National · Recommended

Issue date

March 17, 2023

Implementation date

October 1, 2023

Scope

GB/T 42321-2023 (Additional requirements for internal arc classified pole-mounted metal-enclosed switchgear for rated voltages above 3.6 kV and up to and including 40.5 kV) is available as an English-translated PDF.

GB/T 42321-2023 is the Chinese standard "Additional requirements for internal arc classified pole-mounted metal-enclosed switchgear for rated voltages above 3.6 kV and up to and including 40.5 kV".

Its scope clause reads: This document specifies the terms and definitions, ratings, design and construction of pole-mounted metal-enclosed switchgear with an internal arc category: Additional requirements such as structure, type test and selection guidelines: This document applies to the installation of metal-enclosed switchgear on columns with a rated voltage of 3:6kV~40:5kV and a frequency of 50Hz or less: This document applies to three-phase, two-phase and single-phase equipment with open terminals: Its housing may contain fixed and movable parts and may be filled with Fluid (liquid or gas) for insulation: The metal-enclosed switchgear installed on the pole, on the basis of conforming to the respective product standards, the relevant provisions of its internal arc category meet the requirements of this Documentation required: This document does not exclude other equipment that may be contained within the same enclosure: In this case, it is necessary to consider the effect of the device on any switchgear any possible impact:. Its clauses include terms and definitions.

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Document preview — GB/T 42321-2023

National Standard of the People's Republic of China

ICS: 29.130.10
Classification: K 43

Issued by: State Administration for Market Regulation, China National Standardization Administration

Preface
Introduction
1 Scope
2 Normative references
3 Terms and Definitions
4 Normal and special conditions of use
5 rating
6 Design and structure
7 Type test
8 Guidelines for Selection of Switchgear
9 Documents provided with the order, tender and inquiry
Appendix A (Informative) The structural changes of this document compared with IEC 62271-214:2019
Appendix B (Normative) Confirmation of Samples

1 Scope

This document specifies the terms and definitions, ratings, design and construction of pole-mounted metal-enclosed switchgear with an internal arc category:

Additional requirements such as structure, type test and selection guidelines:

This document applies to the installation of metal-enclosed switchgear on columns with a rated voltage of 3:6kV~40:5kV and a frequency of 50Hz or less:

This document applies to three-phase, two-phase and single-phase equipment with open terminals: Its housing may contain fixed and movable parts and may be filled with

Fluid (liquid or gas) for insulation:

The metal-enclosed switchgear installed on the pole, on the basis of conforming to the respective product standards, the relevant provisions of its internal arc category meet the requirements of this

Documentation required:

This document does not exclude other equipment that may be contained within the same enclosure: In this case, it is necessary to consider the effect of the device on any switchgear any possible impact:

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text: Among them, dated references

For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document:

GB/T 2900:20-2016 Electrotechnical Terminology High Voltage Switchgear and Controlgear (IEC 60050-441:1984, MOD)

Note: There is no technical difference between the referenced content of GB/T 2900:20-2016 and the referenced content of IEC 60050-441:1984:

GB/T 2900:83-2008 Electrotechnical terms Electric and magnetic devices (IEC 60050-151:2001, IDT)

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

2011, MOD)

GB/T 11022-2020 Common technical requirements for high-voltage AC switchgear and control equipment standards (IEC 62271-1:2017,

MOD)

Note: There is no technical difference between the referenced content of GB/T 11022-2020 and the referenced content of IEC 62271-1:2017:

3 Terms and Definitions

GB/T 2900:20-2016, GB/T 2900:83-2008, GB/T 3906-2020 and GB/T 11022-2020 and the following terms and definitions apply to this document:

3:1

Switchgear switchgear

Mainly used for switchgear related to power generation, transmission, distribution and power conversion and its combination with control, measurement, protection and regulation equipment

Combination, including the final assembly consisting of these devices and equipment and associated internal connections, accessories, housings and supports:

[Source: GB/T 2900:20-2016, 3:2]

GB/T 11022 | GB/T 38328 | GB/T 30092 | GB/Z 15166.8 | GB/T 45932 | […]

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 51 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 2900 · IEC 60050 · IEC 62271

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