Situation Analysis of Transportation Industry：

A large number of weak current equipments are installed in urban rail transit station, such as communication equipments, lamp signals, integrated monitoring, situation monitoring, office automation, access control, automatic fare collection, automatic fire alarm, barrier gates, emergency lighting and other systems managing metro station monitoring, messaging, etc. They are crucially important loads, requiring power supply of high reliability to ensure the quality and continuity of power supply.

In the past, since different parts in weak current system is equipped respectively with their own power supplies, and there is no professional technical support for the operation and maintenance, battery capacity decreases and thus required backup time cannot be achieved. Traffic disruptions once occurred due to the problems of batteries.

Industrial Environment and loads:

DC power for rail transit

DC operating power used in the railway industry mainly provides high-reliability power for control and protection devices in power supply system, as well as the operation machine (such as circuit breakers, etc.). By and large, UPS and communication power supply are both separated from the operation power in rail industry.

AC uninterrupted power

AC UPS used in the railway industry mainly provides reliable and high-quality AC power to monitor, command, signal and control.

Power for PSD

PSD (platform screen door) power supply system consists of drive power and control power. Drive power is mainly for on and off of screen door. Control power mainly for related equipments, light control circuit, the safety circuit, the interface circuit in PSL and PSC.