Withstand high voltage up to 750V (IEC/EN standard)
UL 94V-2 or UL 94V-0 flame retardant housing
Anti-falling screws
Optional wire protection
1~12 poles, dividable as requested
Maximum wiring capacity of 6 mm2
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In the context of China's rapid development in the power system, ensuring the safe, reliable, and stable operation of the fire water system in power plants has become increasingly critical. The level of automation and control in these systems is continuously improving. Traditional methods such as manual control and simple electrical interlocking are no longer sufficient due to their low degree of automation and poor reliability. These limitations make it difficult to meet the growing safety requirements of modern power plants.
To address this issue, the Atlantic Pump industry recommends implementing a programmable logic controller (PLC) based fire water system. This advanced control method allows for automatic regulation of water supply pressure, ensuring timely water delivery during emergencies. It also enables automatic switching between pumps, enhancing the safety and efficiency of the water supply system while supporting unattended operation and reducing human error.
The original fire water system was entirely manually controlled. In the event of a fire, the fire pump could not automatically start, leading to delays in water supply and failure to maintain required pressure levels. Additionally, human errors could further delay the response, increasing the risk of pipe bursts and equipment damage. As a result, the traditional system suffered from low automation and poor reliability, posing significant risks during fire incidents.
The new system features a 250KW motor-driven fire pump and a 15KW voltage regulator pump. It utilizes PLC control combined with inverter speed regulation to ensure automatic water supply in unattended conditions. The system includes an analog output pressure sensor, a pressure display meter ranging from 0–1.6MPa, and a switch pressure gauge (P1).
The analog output from the pressure sensor is used as a setpoint input to the PLC. After PID adjustment, the signal is sent to the inverter, which adjusts its frequency accordingly to control the motor speed and maintain constant pressure. When the pressure on the pressure display meter reaches 1.0MPa, the inverter automatically starts the fire pump. When the pressure reaches the upper limit of 1.1MPa, the steady pressure pump is stopped to prevent frequent startups that could reduce its lifespan.
The system also includes a manual/auto transfer switch. Normally, it operates in auto mode, allowing the PLC to control the fire pump. If the inverter or pump fails, the switch can be moved to manual mode, enabling direct operation using manual buttons.
Under normal conditions, the pipeline pressure is maintained at 1.0MPa to ensure immediate water availability for fire hoses. To avoid unnecessary energy consumption, the maximum pressure (upper limit) in the pipeline is set to 10 kg. When the pressure reaches this level without a fire, the PLC stops the fire pump. Similarly, when the pressure reaches 11 kg, the regulator pump is also shut down.
This comprehensive system ensures efficient, reliable, and safe fire water supply, significantly reducing risks and improving overall performance in power plant environments.