Expressway Electromechanical and intelligent traffic control system has a large number of sensitive electronic devices that need surge protection. Why is surge protection necessary?

High exposure:

The equipment is usually installed at high points or protruding positions (lpz0a / b), and the high exposure characteristics increase the risk of lightning damage

Multiple connections:

For example, the overvoltage tolerance and anti-interference ability of DC power supply + data communication combined equipment are reduced

Long outdoor extension distance:
Weak outdoor shielding capacity and long transmission lines sharply increase the risk of system failure

Large indirect loss:
System failure may lead to high system maintenance costs and safety risks such as charging

Equipment sensitivity:
The internal components of intelligent devices are precise and extremely sensitive

Numerous equipment:
A large number of equipment installation increases the probability of system failure under overvoltage

How to protect more reasonable?

Risk analysis: Thunderstorm Day (lightning density), line length, equipment density
Analyze the sensitivity of protected equipment or system
Protect all incoming equipment (AC / DC power supply, communication system, etc.)
Considering the site conditions:
Protected power / signal network characteristics
Surge type and expected amplitude of invasion
Installation features (indoor / outdoor, DIN rail)