TB/T 2307-2017 in English
VALIDGeneral principles of centralized interlocking combined circuits
- Issued on:2017-06-05
- Implemented on:2018-01-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
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| Standard No: | TB/T 2307-2017 |
| Document status: | VALID |
| Title in English: | General principles of centralized interlocking combined circuits |
| Title in Chinese: | 集中联锁结合电路一般原则 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2017-06-05 |
| Implemented on: | 2018-01-01 |
| Chinese Classification: | S62-Station interlocking |
| Professional Classification: | TB-Railway Transport |
| Related Keywords: | combined circuits
design phase inter-yard communication circuits directional circuits circuits introduction standard evolution key system integration requirements integration |
Introduction
Standard Evolution and Technical Architecture
| Comparison Dimensions | TB/T 2307-1992 | TB/T 2307-2017 |
|---|---|---|
| System Coverage | 6 Traditional Systems | 21 Modern Systems (Newly Added STP/RBC, etc.) |
| Communication Mode | Pure Relay Interface | Data Communication + Security Protocol (Clause 2.3/2.6) |
| Typical New Requirements | - | Dual-transmission protection (3.1.5), electronic coding detection (11.7) |
Analysis of core safety requirements
Fail-safe implementation mechanism
Chapter 2 of the standard clearly requires: All combined circuits must comply with the "fail-oriented safety" principle, with the following highlights:
- Data communication must prevent transmission errors (Clause 2.3)
- Earth return lines are prohibited for outdoor lines (Clause 2.4)
- Electrical isolation measures (Clause 2.6)
Typical application cases
A hub station adopts ZPW-2000 track circuit is combined with the interlocking, the code sequence interruption problem caused by the direction switching of the track circuit in the station is effectively solved through the code direction maintenance technology stipulated in Article 20.2.
Key system integration requirements
Integration with train control system (Chapter 17)
The interface between computer interlocking and TCC must:
- Use secure communication protocol (Clause 17.1)
- Real-time exchange of route/speed limit information (Clause 17.2-17.3)
- Anti-double-transmission design of directional circuits (Clause 3.4.4)
Integration with radio block center (Chapter 18)
Transmit through a secure data network:
- Section occupancy status (Clause 18.2)
- Track circuit information within the station
- Temporary speed limit instructions
Implementation suggestions
Precautions in the design phase
- Inter-yard communication circuits must be equipped with inspection lights (Clause 4.1.7)
- Non-entry shunting requires a 30-second delay in unlocking (Clause 8.c)
- Closed-loop detection should be implemented in the coded section (Clause 11.7)
Maintenance points
Key inspections:
- Combined circuit relay action consistency (Clause 2.2)
- Effectiveness of STP system isolation measures (Clause 15.1)
- Directional circuit auxiliary handling function (Clause 3.4.2)
Sample only — not a preview of TB/T 2307-2017
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