The technology of rail transit is developing fast, as more and more auto-control systems are applied to the rail transit system, the operation efficiency and speed is well improved.

Along with the technology development, lots of high-precision and high-speed processing systems are used, the working voltage is getting lower, the anti-interference ability of the system is greatly reduced, and the system security becomes fragile. In operation, due to lightning invasion, power system failure, the over-voltage caused by the complex electromagnetic environment, the systems might be working in risks.             

In view of this, PTG provides the complete lightning and surge protection scheme for each system of urban rail transit, including:

     - Medium voltage AC traction substation           

     - DC traction catenary           

     - Low voltage power system           

     - Lighting system           

     - Automatic Fare Collection system (AFC), including line center, station equipment, field equipment, etc;           

     - Fire alarm system           

     - Environment and equipment monitoring system           

     - Video monitoring system           

     - Police and civil communication system           

     - Passenger information system           

     - Train operation control system           

     - Platform screen door control system, etc

In accordance to:

       1. IEC 62305: Protection against Lightning

       2. IEC 61312: Protection against Lightning Electromagnetic Impulse

       3. IEC 61643-11: Low-voltage Surge Protective Devices

       4. IEC 61643-21: Surge protective devices connected to telecommunications and signaling networks - Performance requirements and testing methods