Sense the process
Pressure, flow, water level, differential pressure and equipment status provide the real-time operating picture.
Water pump VFD control from low-voltage pump sets to 6 kV and 10 kV stations.
WD200 and WD5100 create a continuous low- to medium-voltage platform for more efficient, stable and manageable pressure, flow and level control.
Pressure, flow and level control
380–480 V, 6 kV and 10 kV coverage
Smooth starting and stopping
Multi-pump and SCADA integration
Make pump output follow actual system demand.
Water demand, pressure, flow and level can change continuously. Fixed-speed operation, throttling and frequent direct starting can add energy losses, mechanical stress and pressure fluctuation.
Wolong combines WD200 low-voltage drives and WD5100 medium-voltage drives with sensors, PLC, HMI and SCADA or DCS systems. The architecture can scale from a single pump to a coordinated station.
Calculate demand
Built-in PID or an upstream controller compares feedback with the required setpoint and operating strategy.
Adjust pump speed
WD200 or WD5100 changes motor speed so output can follow current water demand without relying only on throttling.
Coordinate the station
PLC, HMI and industrial communications bring multiple pumps, alarms, trends and remote operation together.
One control platform for low- and medium-voltage pumping systems.
Configure the drive, motor control, process feedback and station network around the pump duty and project environment.
Closed-loop control on demand
Control pressure, flow, level or differential pressure. WD200 includes PID control, while WD5100 can work with local or upstream closed-loop control.
Low- to medium-voltage coverage
WD200 covers three-phase 380–480 V and 0.75–710 kW. WD5100 extends the platform to engineered 6 kV and 10 kV pump systems.
Smooth starts and stops
Controlled acceleration and deceleration reduce starting current and mechanical shock. Deceleration must be coordinated with the hydraulic transient analysis to manage water-hammer risk.
Flexible motor control
WD200 supports induction and permanent-magnet synchronous motors. WD5100 supports induction, excited synchronous and permanent-magnet synchronous motors.
Multi-pump coordination
A PLC or station controller can stage pumps, balance runtime, maintain a common setpoint and coordinate duty and standby equipment.
Open digital integration
Standard and optional communication interfaces connect pump data, alarms and commands to HMI, SCADA and DCS platforms.
From field instruments to the control room.
The solution is organized in four layers so each project can add only the functions it needs while preserving a clear path for future expansion.
- Sensing: pressure, flow, level and equipment-status signals
- Drive: WD200 low-voltage or WD5100 medium-voltage VFD
- Control: built-in PID, PLC sequencing and protection logic
- Monitoring: local HMI, SCADA or DCS operation and records
Built for the pumping duties that keep infrastructure moving.
Municipal water supply
Pressure control, pump staging and station monitoring across changing demand periods.
Wastewater treatment
Flow and level control for lift stations, process pumps and treatment facilities.
Industrial circulation
Demand-matched cooling and process-water circulation for industrial plants.
Water transfer and drainageAgricultural irrigationBuilding and HVAC water systems
More stable control, lower stress and clearer operations.
Match actual demand
Adjust pump speed around the required process output and reduce unnecessary fixed-speed throttling.
Protect mechanical assets
Controlled starting and stopping reduce electrical and mechanical shock to motors, pumps and pipework.
Balance pump runtime
Station-level sequencing can distribute operating hours and coordinate duty and standby pumps.
Find issues earlier
Operating data, trends and alarms improve visibility for inspection and maintenance planning.
Choose the drive platform around voltage, power and station architecture.
Final selection must be checked against pump curve, motor data, supply voltage, control method, hydraulic transients, ambient conditions, altitude and project standards.
ParameterWD200WD5100
Voltage and rating380–480 V; 0.75–710 kW6 kV: 250–9,000 kVA
10 kV: 250–16,000 kVA
10 kV: 250–16,000 kVA
Motor typesIM and PMSMIM, excited synchronous motor and PMSM
Control modesV/F, SVC, FVC, separated V/FV/F, SVC and FVC
Frequency range0–599 Hz0–120 Hz; higher frequency by project
OverloadG: 150% / 60 s; P: 120% / 60 s120% / 1 min
CommunicationsModbus RTU standard; PROFIBUS-DP, PROFINET and CANopen optionalCAN, Modbus RTU/TCP; PROFIBUS-DP optional
Reliability functions designed for real pump-station conditions.
WD200 combines wide-voltage operation, an independent air duct, conformal coating and drive protections. WD5100 uses cascaded power cells, optical communication and modular power units, with project functions such as cell bypass, flying start, restart after power loss and low-voltage ride-through.
Functions and ratings depend on the selected model and project configuration. Confirm the final specification with Wolong application engineering.
Water pump VFD questions.
When should I choose WD200 or WD5100?
Choose primarily by motor voltage and rating. WD200 covers low-voltage pump systems; WD5100 is engineered for 6 kV and 10 kV motors.
How much energy can a pump VFD save?
There is no fixed percentage. Savings depend on the pump curve, operating hours, existing control method and how much flow or pressure varies.
Can the solution maintain constant pressure with multiple pumps?
Yes. A PLC or station controller can stage several pumps and coordinate their speed around one pressure setpoint.
Can a VFD reduce water hammer?
Controlled ramps can help, but the final deceleration profile must be selected with the pipe network and hydraulic transient analysis.
Get a water pump drive solution for your project.
Share the pump curve, motor voltage and rating, required pressure or flow range, duty cycle, number of pumps and control-system requirements. Our team can help define the drive, feedback and station architecture.