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GB/T 45906.5-2025Substation secondary system - Part 5: Protection and control system with their equipment's requirements (English PDF)

变电站二次系统第5部分：保护控制及相关设备

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

August 1, 2025

Implementation date

February 1, 2026

Scope

GB/T 45906.5-2025 is the English-translated version of 变电站二次系统第5部分：保护控制及相关设备.

GB/T 45906.5-2025 is the Chinese standard "Substation secondary system - Part 5: Protection and control system with their equipment's requirements".

Its scope clause reads: This document specifies the substation secondary system relay protection and safety automatic related equipment, automation equipment, power metering and power quality equipment Technical requirements for equipment, data collection and execution equipment, communication equipment and auxiliary monitoring equipment.

This document applies to the design, development, testing, construction, operation, maintenance and overhaul of protection and control and related equipment of substations.

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Document preview — GB/T 45906.5-2025

National Standard of the People's Republic of China

ICS: 29.240.10
Classification: F 20

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

Preface
Introduction
1 Scope
2 Normative references
3 Terms and Definitions
4 Abbreviations
5 Basic Requirements
5.1 Normal working conditions
5.2 Electromagnetic Compatibility
5.3 Network Security Protection
6 Relay protection and safety automation related equipment
6.1 Relay protection and safety automatic devices
6.2 Recording and analysis equipment
7 Automation Equipment
7.1 Measurement and Control Device
7.2 Data Communication Gateway
7.3 Switch
7.4 Clock Synchronization Device
7.5 Synchronized Phasor Measurement Device
7.6 Phase Data Concentrator
8 Power metering and power quality equipment
8.1 General Provisions
8.2 Functional Requirements
8.3 Performance requirements
9 Collection execution equipment
9.1 General Provisions
9.2 Functional Requirements
9.3 Performance requirements
10 Communication equipment
10.1 General Provisions
10.2 Functional Requirements
10.3 Performance Requirements
11 Auxiliary monitoring equipment
11.1 General Provisions
11.2 Functional Requirements
11.3 Performance requirements

1 Scope

This document specifies the substation secondary system relay protection and safety automatic related equipment, automation equipment, power metering and power quality equipment

Technical requirements for equipment, data collection and execution equipment, communication equipment and auxiliary monitoring equipment.

This document applies to the design, development, testing, construction, operation, maintenance and overhaul of protection and control and related equipment of substations.

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 9361 Safety requirements for computer sites

GB/T 11287-2000 Electrical relays Part 21.Measurement of vibration, shock, impact and earthquake of relays and protective devices

Test Part 1.Vibration Test (Sine)

GB/T 13729 Telecontrol Terminal Equipment

GB/T 14285 Technical Specification for Relay Protection and Safety Automatic Devices

GB/T 14537-1993 Shock and impact tests on measuring relays and protective devices

GB/T 14598.24 Measuring relays and protection devices Part 24.Power system transient data exchange (COMTRADE) communication

Use format

GB/T 15145 General technical requirements for transmission line protection devices

GB/T 17215.211 Electrical measuring equipment (AC) General requirements, tests and test conditions Part 11.Measuring equipment

GB/T 17215.301 Special requirements for multi-function electric energy meters

GB/T 17215.303 Particular requirements for alternating current measuring equipment Part 3.Digital energy meters

GB/T 17215.321 Particular requirements for electrical measuring equipment (AC) Part 21.Static active energy meters (Class A, Class B,

C, D, and E grades)

GB/T 17626 (all parts) Electromagnetic compatibility test and measurement technology

GB/T 19862 General requirements for power quality monitoring equipment

GB/T 20840.7 Instrument transformers Part 7.Electronic voltage transformers

GB/T 20840.8 Instrument transformers Part 8.Electronic current transformers

GB/T 26865.2 Power system real-time dynamic monitoring system Part 2.Data transmission protocol

GB/T 32901 General technical requirements for relay protection in intelligent substations

GB/T 33703 Observation Specifications for Automatic Weather Stations

GB/T 34132 General technical requirements for intelligent terminal devices in smart substations

GB/T 36273 Technical specification for digital interface of relay protection and safety automation devices in intelligent substations

GB/T 40435 Technical Specification for Substation Data Communication Gateways

GB/T 45906.3 Substation secondary system Part 3.Communication message specification

GB/T 36050 | GB/T 36278 | GB/T 33592 | GB/T 45906.3 | GB/T 45906.2 | GB/T 45906.1 | […]

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 19 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 17626

Cited by

Editions of GB/T 45906.5

Edition	Title	Revision	Status
GB/T 45906.5-2025	Substation secondary system - Part 5: Protection and control system with their equipment's requirements	current edition	Current

This page sells the current edition, GB/T 45906.5-2025. Earlier editions are listed for reference only.

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