Insulation Protection Tests and Safeguard Measures under Equipotential Connection of Platform Door and Steel Rails
Journal Title: Urban Mass Transit - Year 2024, Vol 27, Issue 9
Abstract
Objective Under the equipotential connection method between platform door system and steel rail, once the ground insulation of the platform door system weakens, the discharge is prone to occur. In order to ensure passengers′ safety, effective insulation safeguard measures for the platform door should be taken based on this method. Method The advantages of equipotential connection of the platform door and the steel rail are analyzed from the two dimensions of the electrical insulation mechanism of the platform door and human electrical safety. A rail potential calculation model is established to simulate the rail potential at the platform door under normal and extreme working conditions. The influence of the parameters of the return current system on the above mentioned rail potential under normal working conditions is analyzed by using the method of changing the value of one single parameter at a time, and the distribution curve of the above rail potential under extreme working conditions is calculated. The testing method and the relevant maintenance measures for the platform door insulation are put forward. Result & Conclusion When the equipotential connection method of the platform door system and the steel rail is used, the maximum value of the rail potential should not exceed 60 V. Under extreme working conditions, the rail potential at the platform door may exceed the above threshold, which may pose threat to the physical safety of the passengers. Therefore, it is necessary to take effective measures to ensure the effectiveness of the platform door insulation.
Authors and Affiliations
Mingrui ZHANG, Tingsong CAO, Jinye LIU, Yue LIU
Keywords
Related Articles
- EP ID EP744317
- DOI 10.16037/j.1007-869x.2024.09.009
- Views 30
- Downloads 0
Analysis of Metro Station Ultra-deep Diaphragm Wall Trench Wall Stability in Soft Soil Stratum
［Objective］ Under complex geological and ultra-deep excavation conditions, maintaining trench wall stability during diaphragm wall construction remains a critical challenge in engineering research. To identify the caus...
Influence of Brake Device Push-out Stiffness on Vibration Performance of Rail Transit Vehicle
Objective As a braking mode,electromechanical brake adopts the motor controlled screw rod drive to implement the pushing action, making the brake shoe to contact with the wheel and complete the transmission of brake forc...
Development of Automatic Calculation Program for Passenger Flow Assignment in Urban Rail Transit Network Based on VISUM
[Objective] In view of the much repetitive work in the calculation process of passenger flow assignment in urban rail transit network, an automatic calculation program is developed on the basis of the research on the pas...
Influence Analysis of Metro Tunnel Underground Construction on Existing Metro Station and Viaduct Pile Foundation
Objective Influence of metro tunnel closely under-passing the existing metro station and viaduct pile foundation is studied. Method Wulidun Station safety line tunnel on Hefei S1 Line closely under-passes the existing Wu...
Calculation and Analysis of Critical Supporting Pressure for Shield Tunnel Excavation Face in Water-rich Sandy Stratum under Seepage Condition
[Objective] Water-rich sandy stratum is a common geological formation encountered in metro shield tunnel excavation. Seepage may occur under the influence of water pressure differences inside and outside the soil chamber...