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Rail transit

As an important part of urban rail transit system, subway has gradually become the main means of transportation for people\'s daily travel. As the main part of the subway is located underground, people often ignore the lightning and surge protection. In fact, we can find many sensitive electrical and electronic equipment in many subway facilities and systems,

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As an important part of urban rail transit system, subway has gradually become the main means of transportation for people's daily travel.

As the main part of the subway is located underground, people often ignore the lightning and surge protection. In fact, we can find many sensitive electrical and electronic equipment in many subway facilities and systems, including power supply system, communication system, signal system, escalator and elevator system, automatic fare collection system (AFC), safety door system, fire alarm system (FAS), environment and equipment monitoring system (BAS), etc. These power supply system and information technology system related equipment, a large number of complex, they are to ensure the safety of the subway system and the normal operation of the most important component.

When a lightning strike occurs, the induced lightning overvoltage caused by the lightning strike may invade into the relevant system along the metal cable, causing the equipment damage without any lightning protection measures, which will endanger the normal operation order of the subway, such as the subway shutdown caused by the damage of the train control system, etc; Serious may cause casualties, as well as major economic losses, such as: automatic fare collection system failure, escalator system failure, fire alarm system false alarm, etc.


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