TB/T 3490-2017 in English
VALIDTechnical specifications of high-voltage safety interlock system for rolling stock
- Issued on:2017-11-19
- Implemented on:2018-06-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$156.00
Introduction
Interpretation of the core content of the standard
This standard establishes a complete technical framework for the high-voltage safety interlock system, ensuring operational safety through mechanical-electrical dual protection. The system adopts a three-level interlocking architecture:
| Interlocking level | Electric locomotive configuration | EMU configuration | Core functions |
|---|---|---|---|
| First level | Pantograph air circuit interlock | Pantograph control interlock | Air circuit cutoff + pantograph raising prohibited |
| Second level | High-voltage earthing switch | Network grounding protection | Forced grounding lock |
| Third level | Equipment cabinet door interlock | Power unit interlock | Physical Access Control |
Key Technical Requirements
Key Management System
The standard stipulates the use of color-coded keys (blue/yellow/green) to achieve permission classification:
- Blue key: control pantograph and earthing switch
- Yellow key: unlock device access rights
- Green key: specific equipment operation rights
Typical application scenarios
When inspecting the traction converter cabinet, the following procedures must be completed in sequence:
1. Remove the pantograph interlocking key→2. Operate the earthing switch→3. Obtain the equipment cabinet door key
Standard Evolution Analysis
Compared with earlier versions, the 2017 version has the following major enhancements:
- Electric train multi-power unit collaborative interlocking
- Add double isolation requirements for gas circuits/electric circuits
- Clear keyhole orientation marking specifications
Implementation suggestions
It is recommended that companies add the following measures:
- Establish an electronic key tracking system
- Add photoelectric sensors to the high-voltage equipment box
- Regularly test the effectiveness of interlocking logic
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