Key attributes

Power and Speed Management

Power Capacity

• It is specifically designed to handle a 37KW fire fan, ensuring stable power supply and operation for the fan. The control box is equipped with appropriate electrical components such as circuit breakers, contactors, and transformers to manage this power level effectively. This allows the fan to operate at its rated power without overheating or experiencing electrical failures.

Two - Speed Functionality

• The control box enables the fire fan to operate at two different speeds. The low - speed setting can be used for normal ventilation requirements, consuming less power and reducing noise. For example, in a building's normal daily operation, the low - speed mode can maintain a basic level of air circulation.
• The high - speed setting is activated during fire emergencies. It provides a significantly higher airflow rate to quickly remove smoke and toxic gases from the affected area, helping to create a safer environment for evacuation and firefighting operations. The transition between the two speeds can be smoothly controlled by the control box.

• Intelligent Control Features

  Programmable Logic

• The intelligent control box is based on programmable logic controllers (PLCs). This allows for customized programming of the fan's operation according to specific requirements. For instance, the control logic can be set to start the fan at a certain time interval for regular ventilation checks or to automatically switch to high - speed mode when a fire alarm signal is received.
• It can also be programmed to perform self - diagnostic routines. The PLC can continuously monitor the fan's operation parameters and detect any abnormal conditions, such as over - current, over - temperature, or motor malfunction. In case of an issue, it can take appropriate actions, such as shutting down the fan and sending an alarm signal.

• Remote Monitoring and Control

• Equipped with communication interfaces, the control box supports remote monitoring and control. It can be connected to a central monitoring system in a building management system (BMS) or a fire - control center via protocols like Modbus, Ethernet/IP, or Profibus.
• Operators can remotely start, stop, or switch the speed of the fire fan from a central location. They can also monitor real - time data such as fan speed, current consumption, and temperature. This remote functionality enhances the efficiency of fire - prevention and ventilation management, especially in large - scale buildings or industrial complexes.

• Protection Functions

  Over - current Protection

• A thermal relay or an electronic over - current protection device is installed in the control box. It continuously monitors the current flowing through the fan motor. If the current exceeds the pre - set threshold (usually slightly higher than the rated current), the protection device will quickly cut off the power supply to prevent damage to the motor.

• Over - temperature Protection

• Temperature sensors are used to monitor the temperature of the motor and other critical components in the control box. When the temperature rises above a safe level, the control box can take actions such as reducing the fan speed or shutting down the motor to avoid overheating and potential fire hazards.

• Phase - loss Protection

• In a three - phase power supply system, phase - loss can cause serious damage to the motor. The control box is equipped with phase - loss detection circuitry. If it detects the absence of one or more phases, it will immediately stop the fan to prevent motor burnout.