The power supply system of the high-voltage AC lower computer is composed of the machine frame, the step-down transformer and the voltage stabilizing power supply module. Single-phase input voltages are available in 400VAC, 660VAC, 800VAC, 1000VAC, 3.3kVAC, and 10kVAC. The output voltage is 220± 1% VAC. It features various protections (input overvoltage and undervoltage protection, output overvoltage and undervoltage protection, output overcurrent protection, and output short circuit protection). It features over-temperature protection, leakage protection, human contact protection, communication fault alarm and output lightning protection. The system is equipped with an LCD display and keyboard operation, which can monitor and control the current working parameters and status of the system in real time. Communicate with the upper computer of the high-voltage AC power supply via RS485/RS232, and report the remote measurement parameters and alarm quantities of the power supply.

This system is an integrated power supply system solution that takes power from service areas, toll stations, and stable municipal power connection points to the load equipment along the expressway. The load equipment along the expressway includes ETC gantry cranes, information boards, surveillance cameras, meteorological monitoring equipment, short tunnel lighting equipment, etc.

Power generator (upper computer) :

★ Adopt PWM fine voltage regulation technology;

★ It features input and output overvoltage and undervoltage protection, output overcurrent protection, short circuit protection, over-temperature protection, etc. No-load protection, leakage protection, power line lap protection, and human body lap protection functions;

★ Modular hot-swappable structure

★ Zero-switching automatic bypass system;

Both the software and hardware adopt anti-interference design to enhance the anti-interference capability.

★ It provides a self-diagnostic function for the equipment, facilitating its maintenance.

★ Automatic power-on engagement function, no need to restart when power is restored;

★ Communication interface for convenient connection with control systems and lower-level computers.

★ Lightning protection: The output side is equipped with a lightning protection unit, and the lightning protection level is both common and differential mode 20KA (8/20uS).

Isolation Converter (lower computer) :

★ It has overcurrent and overvoltage protection functions;

★ Modular hot-swappable structure

★ Zero-switching automatic bypass system;

Both the software and hardware adopt anti-interference design to enhance the anti-interference capability.

★ Automatic power-on engagement function, no need to restart when power is restored;

★ Equipped with power-on zero-crossing start function;

★ Equipped with timing control function.

★ Communication interface for convenient connection with computer control systems;

All the lines have undergone moisture-proof treatment and are suitable for use in humid areas.

★ Lightning protection: The output side is equipped with a lightning protection unit, and the lightning protection level is both common and differential mode 20KA (8/20uS).