GB/T 7261-2026Basic test methods for protection relays and security automatic equipment (English PDF)

3 Terms, definitions and abbreviations

4 Test conditions

5 Inspection of the construction and appearance

6 Basic performance tests

7 Tests of the digital interface

8 Tests of the power consumption and the optical power

9 Temperature-rise test

10 Climatic environmental tests

11 Tests of the influence of the power supply

12 Mechanical performance tests

13 Electromagnetic compatibility tests

14 Overload test

15 Electrical and mechanical endurance tests

16 Safety tests

17 Information security tests

18 Communication and protocol tests

19 Functional tests of the device

Foreword

This document was issued on 2 July 2026 by the State Administration for Market Regulation and the Standardization Administration of the People's Republic of China, and takes effect on 1 February 2027.

It replaces GB/T 7261-2016, which remains in force until that date.

The document is under the responsibility of the China Electrical Equipment Industry Association.

Classification: ICS 29.120.70, CCS K 45.

3 Classification and status

GB/T 7261-2026 is classified under ICS 29.120.70, in the field of electrical engineering. ICS is the International Classification for Standards, the same scheme used by ISO and by the national bodies of most countries, which is what allows a Chinese standard to be placed beside its foreign counterparts on subject rather than on number.

Its Chinese Standard Classification code is CCS K 45. CCS is the domestic scheme, a letter for the sector and two digits for the subject within it, and it is the code by which the standard is filed and searched in China.

The GB/T prefix marks a recommended national standard. It is not, in itself, law: it becomes binding when a contract names it, when a regulation or a mandatory standard refers to it, or when a producer declares conformity with it. In practice that covers most of the cases in which it will be read — a purchase specification, an inspection agreement or a certification scheme.

The document is under the responsibility of the China Electrical Equipment Industry Association, which is the body that maintains it and that will answer a formal question about its interpretation.