GB/T 25119-2010 in English

《GB/T 25119-2010轨道交通 机车车辆电子装置》由TC278（全国轨道交通电气设备与系统标准化技术委员会）归口，TC278SC1（全国轨道交通电气设备与系统标准化技术委员会机车车辆电气分会）执行，主管部门为国家铁路局。

1 Scope
This Standard specifies the requirements of service, design, manufacture, and testing of electronic equipment, as well as basic hardware and software requirements considered necessary for durable and reliable equipment. Additional requirements in other standards or specifications may complement this Standard, if applicable. List of subclauses of this Standard in which agreement between the parties is mentioned is detailed in Appendix B.
This Standard applies to all electronic equipment for control, regulation, protection, supply, etc. installed on rail vehicles (including subway and urban rail vehicle).The equipment may be powered by the batteries or generators of vehicles or powered by a low-voltage power supply with or without a direct connection to the contact system (transformer, voltage divider and auxiliary power supply).For the purposes of this Standard, electronic equipment is defined as equipment mainly composed of semiconductor devices and recognized associated components. These components will mainly be mounted on printed boards.
Note: sensors (current, voltage, speed, etc.) and firing unit printed board for power electronic equipment are covered by this Standard. Complete firing units are covered by GB/T 25122.1.
This Standard is not applicable to the power electronic equipment in the main circuits and auxiliary circuits.
2 Normative References
The following standards contain provisions which, through reference in this text, constitute provisions of this standard. For dated reference, subsequent amendments to (excluding correction to), or revisions of, any of these publications do not apply. However, the parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards. For undated references, the latest edition of the normative document referred to applies.

Contents
Foreword i
1 Scope
2 Normative References
3 Terms and Definitions
4 Environmental Conditions
4.1 Normal Service Conditions
4.2 Special Service Conditions
5 Electrical Requirements
5.1 Power Supply
5.2 Supply Overvoltages
5.3 Installation
5.4 Surges and Electrostatic Discharge
5.5 Electromagnetic Compatibility
6 Reliability, Maintainability and Expected Useful Life
6.1 Equipment Reliability
6.2 Useful Life
6.3 Maintainability
6.4 Maintenance Levels
6.5 Automatic Diagnosis
6.6 Automatic Test Equipment
6.7 Alternative Methods for Fault Diagnosis
6.8 Special Test Equipment and Special Tools
7 Design
7.1 General Provisions
7.2 Hardware Requirements
7.3 Software Requirements
7.4 Equipment Features
8 Components
8.1 Procurement
8.2 Application
9 Manufacture
9.1 Equipment Construction
9.2 Component mounting
9.3 Electrical Connections
9.4 Internal Flexible Wiring (Electrical and Optical)
9.5 Flexible Printed Wiring
9.6 Printed Boards – Flexible and Rigid
9.7 Coating for Printed Board Assemblies
9.8 Identification
9.9 Assembling
9.10 Cooling and Ventilation
9.11 Materials and Finishes
10 Safety
10.1 General Provisions
10.2 Functional Safety Requirements
10.3 Personnel Safety Requirements
11 Documentation
11.1 Supply and Storage of Documentation
11.2 Hardware and Software Documentation
11.3 Documentation Requirements
12 Tests
12.1 Categories of Tests
12.2 Test items
13 Product Marking and Packaging
13.1 Marking
13.2 Packaging
Appendix A (Informative) Technical Differences Between this Standard and IEC 60571:2006 and the Relevant Reasons
Appendix B (Informative) List of Subclauses in Which Agreement between the Parties (e.g. User and Manufacturer) is Mentioned