Standard No.:	GB/T 46690-2025
English Name:	Technical specification for alarm information and fault grading for signal system of urban rail transit
Chinese Name:	城市轨道交通信号系统报警信息及故障分级技术规范
Chinese Classification:	R11    Passenger traffic
Professional Classification:	GB    National Standard
ICS Classification:	03.220.30 03.220.30     Transport by rail 03.220.30
Source Content Issued by:	SAMR, SAC
Issued on:	2025-10-31
Implemented on:	2026-2-1
Status:	to be valid
Target Language:	English
File Format:	PDF
Word Count:	26500 words
Translation Price(USD):	795.0
Delivery:	via email in 1~8 business day

GB/T 46690-2025 Technical specification for alarm information and fault grading for signal system of urban rail transit English, Anglais, Englisch, Inglés, えいご This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered. ICS 13.220.10 CCS H 57 National Standard of the People's Republic of China ‌GB/T 46690-2025 Technical specification for alarm information and fault grading for signal system of urban rail transit 城市轨道交通信号系统报警信息及故障分级技术规范 Issue date: 2025-10-31 Implementation date: 2026-05-01 Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China the Standardization Administration of the People's Republic of China Contents Foreword 1 Scope 2 Normative References 3 Terms and Definitions 4 Abbreviations 5 General Requirements 6 Alarm Information Requirements 7 Fault Classification Requirements 8 Validation Methods Appendix A (Informative) Signal System Alarm Information Examples Appendix B (Normative) Signal System Alarm Information Appendix C (Normative) Signal System Fault Classification References 1 Scope This document specifies the general requirements, alarm information requirements, and fault classification requirements for urban rail transit signal systems (referred to as alarm information and faults), and describes their validation methods. This document is applicable to the functional design, equipment use, and operational maintenance of urban rail transit signal systems based on Communication-Based Train Control (CBTC) systems. 2 Normative References The contents of the following documents constitute indispensable provisions of this document through normative references in the text. For dated references, only the edition corresponding to that date applies. For undated references, the latest edition (including all amendments) applies. GB/T 12758 General Technical Conditions for Urban Rail Transit Signal Systems GB/T 32852.3 Urban Passenger Transport Terminology — Part 3: Urban Rail Transit 3 Terms and Definitions The terms and definitions given in GB/T 12758, GB/T 32852.3, and the following apply to this document. 3.1 Fault A state in which a system or equipment is unable to perform its required function. Note: Excluding preventive maintenance or other planned activities, or lack of external resources. [Source: GB/T 7826—2012, 3.3, modified] 3.2 Alarm Visual or auditory information provided to operating personnel to indicate a fault or other abnormal event that requires a response. Note: Alarms are divided into fault alarms and alarms for other abnormal events. [Source: GB/T 41261—2022, 3.1.7, modified] 4 Abbreviations The following abbreviations apply to this document. AM: Automatic Train Operating Mode AP: Access Point ATC: Automatic Train Control ATO: Automatic Train Operation ATP: Automatic Train Protection ATS: Automatic Train Supervision BBU: Building Base Band Unit CAM: Creep Automatic Mode CBTC: Communication-Based Train Control CM: Coded Train Operating Mode DCS: Data Communication System EB: Emergency Braking ESB: Emergency Stop Button FAM: Fully Automatic Train Operating Mode FAO: Fully Automatic Operation LTE: Long Term Evolution MSS: Maintenance Supervision System PIS: Passenger Information System RGB: Red Green Blue RM: Restricted Train Operating Mode RRM: Remote Restricted Train Operating Mode RRU: Radio Remote Unit SPKS: Staff Protection Key Switch TCMS: Train Control and Management System UPS: Uninterruptible Power System VOBC: Vehicle On-Board Controller ZC: Zone Controller 5 General Requirements 5.1 Alarm information shall be clear, complete, and accurate in meaning. 5.2 The content of alarm information shall adopt a unified format and shall support multi-dimensional statistical analysis. 5.3 Alarm information shall reflect different levels of urgency and shall be distinguished by different alarm levels. 5.4 Based on the monitoring requirements of different positions, alarm information shall be displayed on corresponding interfaces such as maintenance supervision workstations, ATS workstations, or on-board equipment HMIs. 5.5 Fault classification shall be determined based on the impact degree of the signal system's inability to perform its required function on operational safety, train command, and train operation. 5.6 Alarm information sources shall include equipment such as ATS, on-board equipment, ZC, interlocking, DCS, maintenance supervision equipment, power supply equipment, switch machines, signals, axle counters, and track circuits. 6 Alarm Information Requirements 6.1 Alarm Information Content 6.1.1 Alarm information shall include the following: a) Alarm description; b) Alarm code;