GB10494-2018
Technical specification for crossing signal equipment in wayside
铁路区间道口信号设备技术条件
GB 10494-2018 is a current mandatory Chinese national standard for Technical specification for crossing signal equipment in wayside. It appears in the Electronics compliance cluster with a electrical safety focus and has an implementation date of Feb 1, 2019.
Applicability depends on product scope, certification route, competent authority notices and transition rules. Requst for the translation or verify source before using this record in a compliance decision.
Compliance overview
Scope and applicability
This standard specifies the technical conditions for crossing signal equipment installed in railway sections (wayside). It applies to various types of level crossing safety equipment, including automatic warning devices, automatic signals, and automatic barriers. It is specifically designed for railway intersections located between stations and does not cover station-area level crossings, which are addressed by GB 10493.
Technical requirements
This standard outlines comprehensive technical requirements for railway wayside crossing signal equipment. All technical content within this standard is mandatory. It dictates that when a train approaches, the signals for road and railway directions must not open simultaneously. The equipment must adhere to the fail-safe principle for sensing and logical control. The standard defines specific requirements for power supply reliability, mandating uninterrupted power sources and backup batteries. It also details the physical placement and display rules for level crossing signals, obstruction signals, and automatic barriers, ensuring they are positioned safely from the nearest rail. Furthermore, the standard introduces modern engineering requirements by incorporating RAMS (Reliability, Availability, Maintainability, and Safety) criteria, demanding a SIL4 safety integrity level for computer-based systems. It also mandates compliance with specific electromagnetic compatibility (EMC), software lifecycle, and safety-related electronic system standards. Environmental conditions are strictly defined, requiring outdoor equipment to withstand extreme temperatures ranging from -40°C to +70°C, high humidity, and significant vibration. Outdoor equipment must also meet strict dust and waterproof standards to ensure operational integrity.
Testing methods
Compliance is verified through design validation against referenced standards rather than specific standalone testing steps in this document. Key evaluation areas include electromagnetic compatibility testing per GB/T 24338.5, software system verification per GB/T 28808, and safety-related electronic system assessment per GB/T 28809. Engineers must also perform calculations for train approach warning times and approach section lengths using the formulas provided in the standard's normative appendix.
FAQs
What products and areas are regulated under GB 10494-2018?
The standard applies to signal equipment installed at railway level crossings in the section between stations. It does not apply to level crossings located within railway station limits.
Are there any major updates from the previous GB 10494-1989 version?
The 2018 version introduces significant updates, including the addition of RAMS requirements (SIL4), EMC specifications, software and electronic system design criteria, and a mandatory interlocking rule preventing simultaneous road and railway signals. It also removed outdated concepts like speed-measured timed alarms.
Does GB 10494-2018 align with international standards?
Yes, the standard heavily references international equivalents, such as IEC 62278 for RAMS, IEC 62279 for software, and IEC 62425 for safety-related electronic systems, aligning it closely with modern international railway standards.
The summary above provides a high-level overview of GB 10494-2018. To ensure complete compliance for your railway signal equipment entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 10494-2018 today to access all detailed parameters, calculation formulas, and testing procedures.
Applicability hints
- Type
- Product
- CCS
- S61
- ICS
- 45.020
- Competent department
- National Railway Administration
- Technical committee
- National Technical Committee on Rail Transit Electrical Equipment and Systems of Standardization Administration of China
Relationships
Replaces:GB 10494-1989