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GB/T 45119-2024Technical requirements for insulation monitoring of low voltage power supply systems in power plants and substations (English PDF)

电力厂站低压用电系统的绝缘监测技术要求

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

December 31, 2024

Implementation date

July 1, 2025

Scope

GB/T 45119-2024 is the English-translated version of 电力厂站低压用电系统的绝缘监测技术要求.

GB/T 45119-2024 is the Chinese standard "Technical requirements for insulation monitoring of low voltage power supply systems in power plants and substations".

Its scope clause reads: This document specifies the basic requirements, monitoring requirements, installation acceptance and operation and maintenance of low-voltage power systems in power plants and stations.

Require. This document is applicable to the design, selection and installation of insulation monitoring of low voltage AC and DC power systems in power projects such as power plants, substations and converter stations. and use. Its clauses include terms and definitions.

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Document preview — GB/T 45119-2024

National Standard of the People's Republic of China

ICS: 29.080
Classification: K 80

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Preface
1 Scope
2 Normative references
3 Terms and Definitions
4 Basic Requirements
4.1 Working Environment
4.2 Electrical performance
4.3 Communications and others
5 Monitoring requirements
5.1 Classification
5.2 Functional indicators
5.3 Main methods
6 Installation Acceptance
6.1 Inspection
6.2 Layout
6.3 Acceptance
7 Operation and Maintenance
7.1 Run
7.2 Maintenance
Appendix A (Normative) Environmental adaptability and electromagnetic compatibility requirements
Appendix B (Informative) Insulation monitoring of low voltage DC ungrounded systems
Appendix C (Informative) Insulation monitoring of low voltage AC ungrounded systems
Appendix D (Informative) Insulation monitoring of low voltage AC grounding systems

1 Scope

This document specifies the basic requirements, monitoring requirements, installation acceptance and operation and maintenance of low-voltage power systems in power plants and stations.

Require.

This document is applicable to the design, selection and installation of insulation monitoring of low voltage AC and DC power systems in power projects such as power plants, substations and converter stations.

and use.

2 Normative references

The contents of the following documents constitute the essential clauses of this document through normative references in this document.

For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to

This document.

GB/T 2423.1-2008 Environmental testing for electric and electronic products Part 2.Test methods Test A. Low temperature

GB/T 2423.2-2008 Environmental testing for electric and electronic products Part 2.Test methods Test B. High temperature

GB/T 2423.5-2019 Environmental testing Part 2.Test method Test Ea and guidance. Impact

GB/T 2423.10-2019 Environmental testing Part 2.Test methods Test Fc. Vibration (sinusoidal)

GB/T 2900.1 Basic terms of electrical engineering

GB/T 2900.33 Electrical terminology Power electronics technology

GB/T 4365 Electrical terminology - Electromagnetic compatibility

GB/T 17626.2 Electromagnetic compatibility test and measurement technology Electrostatic discharge immunity test

GB/T 17626.3 Electromagnetic compatibility test and measurement technology Part 3.Radio frequency electromagnetic field radiation immunity test

GB/T 17626.4 Electromagnetic compatibility test and measurement technology Electrical fast transient pulse group immunity test

GB/T 17626.5 Electromagnetic compatibility test and measurement technology Surge (impact) immunity test

GB/T 17626.6 Electromagnetic compatibility test and measurement technology - Immunity to conducted disturbances induced by radio frequency fields

GB/T 17626.8 Electromagnetic compatibility test and measurement technology Power frequency magnetic field immunity test

GB/T 17626.10 Electromagnetic compatibility test and measurement technology Damped oscillating magnetic field immunity test

GB/T 17626.18 Electromagnetic compatibility test and measurement technology Damped oscillation wave immunity test

DL/T 860 (all parts) Power automation communication networks and systems

3 Terms and definitions

The terms and definitions defined in GB/T 2900.1, GB/T 2900.33, GB/T 4365 and the following apply to this document.

3.1 Insulation monitoring

Monitor and measure the insulation condition of busbars and branches to ground in low voltage AC and DC power supply systems.

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 27 pages — is available in the English PDF.

Referenced standards

Normative references

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