Application of the Xinshida AS180 Inverter in Deep-Well Submersible Pumps for the Water Industry
2025-05-23
Application of the Xinshida AS180 Inverter in Deep-Well Submersible Pumps for the Water Industry
Project Background
Xinshida has been deeply engaged in the pump industry for 15 years. The AS180 is one of Xinshida’s earliest and most iconic series of variable-frequency drives specifically designed for the pump industry. Thanks to its outstanding control performance and unique pump-application macros, it has earned the trust of numerous pump industry partners. In particular, its application in deep-well submersible pumps has set an industry benchmark and received high praise from customers.
Recently, a water treatment plant in Shanxi Province selected 13 AS180 series 90-kW variable-frequency drives (VFDs) from Xinshida for a project to upgrade its deep-well pump water intake system, replacing the original soft-start system with VFD-driven operation. The original system’s deep-well pump had a rated power of 75 kW, a rated head of 320 m, and a flow rate of 50 m³/h. The pump is located at a depth of 200 meters underground, while the surface features an ultra-large reservoir that provides purified tap water to residents throughout the city after treatment.
Customer needs
The original system has low energy efficiency utilization and high operating costs:
01
The manual judgment of reservoir water levels and the corresponding operation to start or stop pumps based on these readings result in high labor costs.
02
Frequent and repeated starts and stops using a soft starter significantly impact the mechanical stress on both the pump and the motor, thereby shortening the service life of the submersible pump system. This also results in short pump maintenance cycles and heavy workload for maintenance personnel.
03
In winter evenings, water demand is low. To prevent pipes from freezing, the pump runs at full frequency, causing overflow when the liquid level exceeds the safe threshold and resulting in wastage of water resources.
04
After soft starting, the pump runs at power frequency, resulting in high energy consumption and low energy utilization efficiency.
Xinshida Solution
Scheme advantages
● We offer a variety of customized models, including high-protection IP55, integrated drive and control, and backpack-style installation options.
● Compatible with program upgrades to drive various permanent-magnet synchronous motors;
● Integrated pump-control logic module, enabling easy control and operation through constant-pressure, constant-current, and constant-frequency control logics;
● Multiple parameter application macros that can be directly invoked based on the control device’s requirements;
● Unique GVC control mode enhances control performance, boosts output torque, and makes driving the water pump easier.
● Built-in high-efficiency motor protection logic, short-circuit protection, motor overload protection, stall protection, low-water-level protection, and overpressure protection—all working together to ensure the stable operation of the pump.
Scheme Composition
Associated products
AS180N Universal Inverter
Project Results
After testing and operation, the retrofit has resulted in more efficient energy utilization and lower operating costs.
● By installing pressure transmitters in the pipeline network and combining them with level acquisition comparison logic, along with PID control of the frequency converter, the system achieves automatic speed adjustment, reduces manual intervention, and operates more efficiently.
● Variable-frequency start-up is smoother, reducing the impact on pumps, motors, and pipeline networks, extending the maintenance cycle of pumps, and lowering maintenance costs.
● Frequency conversion control ensures the stability of water supply flow and pressure, preventing issues such as winter pipe freezing and bursting, as well as water resource waste caused by overflow from high-level water flows.
● The frequency converter adjusts the pump flow rate by regulating the rotational speed, enabling precise control and greater energy efficiency.
