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GB/T 22200.3-2025Reliability of low-voltage apparatus - Part 3: Reliability test method for overload relays (English PDF)

低压电器可靠性　第3部分：过载继电器可靠性试验方法

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

December 31, 2025

Implementation date

July 1, 2026

Scope

GB/T 22200.3-2025 is the English-translated version of 低压电器可靠性　第3部分：过载继电器可靠性试验方法.

GB/T 22200.3-2025 is the Chinese standard "Reliability of low-voltage apparatus - Part 3: Reliability test method for overload relays". Its scope clause reads: This document specifies the reliability indicators, reliability test methods, reliability test sampling plan and test procedures for overload relays.

Record the reliability test methods and procedures under live operation. This document applies to the reliability test methods for overload relay products that conform to GB/T 14048.4 or GB/T 14048.6. Its clauses include terms, definitions and symbols.

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Document preview — GB/T 22200.3-2025

National Standard of the People's Republic of China

ICS: 29.120.40
Classification: K 31

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

Preface
Introduction
1.Scope
2 Normative References
3.Terms, Definitions, and Symbols
3.1 Terms and Definitions
3.2 Symbol
4.Reliability Indicators
4.1 General Requirements
4.2 Protection Success Rate Level
5.Reliability Testing Methods
5.1 Test Conditions
5.2 Sample Preparation
5.3 Detection of Specimens
5.4 Failure Criteria
5.5 Test Apparatus
6.Reliability test sampling plan and test procedure
6.1 Reliability Test Sampling Plan
6.2 Reliability Test Procedure
7.Experimental Records 6.
8.Reliability testing methods and procedures under live operation
Appendix A (Informative) Schematic Diagram of Overload Relay Reliability Test Apparatus
Appendix B (Informative) Test Report
Appendix C (Normative) Procedures for Determining Reliability Data of Overload Relays Under Live Operation

1 Scope

This document specifies the reliability indicators, reliability test methods, reliability test sampling plan and test procedures for overload relays.

Record the reliability test methods and procedures under live operation.

This document applies to the reliability test methods for overload relay products that conform to GB/T 14048.4 or GB/T 14048.6.

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 2900.18-2008 Electrical Engineering Terminology - Low-Voltage Electrical Appliances

GB/T 2900.99-2016 Reliability and Service Quality of Electrical Engineering Terminology

GB/T 5080 (All Parts) Equipment Reliability Testing

GB/T 14048.1-2023 Low-voltage switchgear and controlgear – Part 1.General principles

GB/T 14048.4-2020 Low-voltage switchgear and controlgear – Part 4-1.Contactors and motor starters – Electromechanical type

Contactors and motor starters (including motor protectors)

GB/T 14048.5-2017 Low-voltage switchgear and controlgear – Part 5-1.Electromechanical components of control circuits and switching elements

Type control circuit electrical appliances

GB/T 14048.6-2016 Low-voltage switchgear and controlgear – Part 4-2.Contactors and motor starters (AC half-voltage)

Conductor motor controllers and starters (including soft starters)

Standard mounting rails for mechanical supports

GB/T 22200.1-2025 Low-voltage electrical appliances - Reliability - Part 1.General rules

3 Terms, Definitions and Symbols

3.1 Terms and Definitions

GB/T 2900.18-2008, GB/T 2900.99-2016, GB/T 5080 (all parts), GB/T 14048.1-2023,

The terms and definitions defined in GB/T 14048.4-2020, GB/T 14048.6-2016, and GB/T 22200.1-2025, as well as the following terms and definitions, shall apply.

Used in this document.

3.1.1 Reliable life

The amount of time required to reduce the reliability of a product to a given value.

Note. For overload relays, reliable life is expressed as the number of operating cycles.

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 14 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 5080

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