TB/T 2353-2018 in English

Background of Standard Revision and Technical Evolution

TB/T 2353-2018, as the core standard in the field of railway signal lighting, has made 7 major technical revisions to the 1993 version, mainly in response to the popularization of LED light sources and the development of high-speed railways. The new version of the standard deletes outdated technical requirements such as traditional wall panel signal machines, and adds modern equipment specifications such as train tail indicator lights.

Comparative Analysis of Key Indicators

Analysis of core technical requirements

4.1 Light intensity of color light signal

For the first time, the standard establishes a dual control mechanism of upper and lower limits of light intensity. For example, the red high-column signal requires 2,100-6,900cd to avoid the overexposure problem caused by the traditional lower limit. LED signal needs to pay special attention to the upper limit compliance.

4.3 Requirements for dispersion function

Lens-type signal machines with dispersion function must meet special light intensity distribution:

• Red light intensity ≥800cd at a dispersion angle of 10°
• Yellow light intensity ≥1,200cd at a dispersion angle of 20°

Test method innovation

Clause 5.4 stipulates the application requirements of the new rotating test platform:

1. Test distance is classified according to equipment type (8m/5m/3m/1.5m)
2. Deflection function equipment requires sampling at 0.5° intervals
3. The accuracy requirement of the illuminance meter is improved to Class II

Implementation suggestions