INVT GD200A frequency converter: dedicated water supply function, creating the core center of constant pressure water supply system
1、 GD200A has built-in water supply function, simplifying the architecture of constant pressure water supply system
In urban and rural water supply, HVAC, industrial circulating water and other scenarios, the constant pressure water supply system is the core supporting facility, and the frequency converter is the control center of the constant pressure water supply system. The traditional constant pressure water supply scheme often requires additional control equipment such as PLC and PID regulators, with complex system architecture, cumbersome wiring, and difficult debugging, while also increasing equipment failure points. The INVT GD200A frequency converter is equipped with a dedicated constant pressure water supply function, which does not require additional control equipment. A single frequency converter can achieve complete constant pressure water supply control, greatly simplifying the system architecture and reducing system construction costs.
The water supply function of INVT GD200A inverter can achieve linkage control of one inverter main pump with multiple power frequency auxiliary pumps. By using the built-in relay output terminal of the inverter, the start and stop of the power frequency auxiliary pumps can be directly controlled without the need for additional intermediate control equipment. At the same time, the product supports dedicated water supply functions such as multi pump wheel circulation control, timed pump replacement, sleep and wake-up, which can perfectly adapt to various constant pressure water supply scenarios such as domestic water supply, production water supply, HVAC circulating water, etc., truly realizing that one frequency converter can handle the entire constant pressure water supply system.
2、 GD200A precise PID control achieves closed-loop stable regulation of water supply pressure
The core requirement of a constant pressure water supply system is to achieve precise and stable control of pipeline pressure, avoiding fluctuations in pipeline pressure caused by water consumption, which can affect the water experience and equipment service life. The INVT GD200A frequency converter is equipped with a high-performance PID closed-loop control algorithm, which can collect pressure feedback signals from the pipeline network through pressure sensors, compare them in real time with the set pressure target value, automatically adjust the output frequency of the frequency converter, and control the water pump speed to achieve closed-loop stable regulation of pipeline pressure.
In terms of pressure setting methods, the INVT GD200A frequency converter provides flexible and diverse options, supporting keyboard numerical settings, analog signal settings, and MODBUS 485 remote communication settings. It can achieve seamless switching between set values and set channels, and is compatible with various control modes such as local control, remote central control, and PLC linkage. The analog input resolution of the product is ≤ 10mV, which can accurately identify small pressure feedback signal changes, achieve a stable speed accuracy of ± 0.2%, and ensure stable control of pipeline pressure. Even in scenarios with severe fluctuations in water consumption, the pipeline pressure can be maintained constant.
3、 GD200A has rich peripheral interfaces, suitable for multi pump linkage water supply scenarios
INVT GD200A frequency converter provides rich peripheral interface resources for different sizes of constant pressure water supply systems, which can perfectly adapt to various water supply scenarios such as single pump and multi pump linkage. The product is equipped with multiple multifunctional digital input terminals, compatible with PNP and NPN input types, and can be connected to various external control signals such as liquid level switches, pressure switches, fire signals, remote start stop, etc; Equipped with 2 relay output terminals, it can directly control external devices such as power frequency auxiliary pumps, solenoid valves, alarm indicator lights, etc; Equipped with 2 analog input and 2 analog output interfaces, it can perfectly adapt to various external devices such as pressure sensors, remote pressure gauges, and secondary instruments.
At the same time, the INVT GD200A frequency converter supports the MODBUS RTU communication protocol and can easily connect to PLC, SCADA systems, building automation systems, and smart water platforms to achieve remote monitoring, data acquisition, remote start stop, parameter modification, and other functions, adapting to the application needs of modern water supply scenarios such as smart water supply and unmanned pumping stations. Rich interface resources and comprehensive communication functions enable the INVT GD200A frequency converter to flexibly adapt to various complex water supply system designs, providing comprehensive interface support for constant pressure water supply systems.
4、 GD200A high reliability design ensures 24/7 continuous operation of the water supply system
As the core infrastructure for people's livelihood and production, the water supply system has extremely high requirements for the continuous operation capability and reliability of equipment. Once the equipment fails and shuts down, it will cause serious impacts. The INVT GD200A frequency converter takes reliability as its core principle throughout the entire process from design to production. The entire series of products has passed CE certification and adopts a wide voltage range design, which can adapt to power grid fluctuations of 380V (-15%)~440V (+10%). Even in towns and remote areas with harsh power grid environments, it can operate stably.
At the same time, the INVT GD200A frequency converter is equipped with more than 30 fault protection functions such as overcurrent, overvoltage, undervoltage, overtemperature, phase loss, overload, and anti dry running, which can comprehensively protect the safe operation of the frequency converter and water pump motor; The product has functions such as automatic fault reset, automatic restart, and power frequency bypass switching. Even in the event of an instantaneous fault, it can quickly restore operation and maximize the continuity of water supply. The product has passed comprehensive reliability tests such as high and low temperature, humidity and heat, salt spray, etc. It adopts an independent air duct design, which can adapt to harsh environments with high humidity and dust in the pump room, providing strong guarantee for the continuous and stable operation of the water supply system around the clock.
