Zhuhai Wanlida Electrical Automation Co., Ltd.

China Manufacturer with main products: AC Drive, Variable Frequency Drive, Soft Starter, Static Var Generator, SVG/Statcom, Active Power Filter, Protection Relay, SVC

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Wanlida frequency inverter

FOB Price: 30,000.00 - 300,000.00 USD/Set
Supply Ability: 500 Set/Sets per Year
Shipping: 50 days
Payment Terms: L/C, T/T
In Stock
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Export Markets: North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, Mid East, Eastern Asia, Western Europe
Place of Origin: Guangdong in China
Packaging Details: Wooden case (Fumigation)

Quick Details

  • adjustable frequency inverter: ac frequency inverter


Wanlida Medium Voltage Variable Frequency Inverter
Energy Saving Fields
  • Power Generation: Induced draft fan, forced draft fan, condensate pump, feed pump, primary air fan, secondary air fan, booster fan, circulating pump, mill fan, slurry pump etc
  • Cement: draft fan, high-temperature fan, air blower, dust collection fan, grinding machine etc.
  • Metallurgy: blast furnace blower, slurry pump, feed water pump, dust fan, compressor etc.
  • Petroleum&Chemical: Water injection pump, crude oil pump, Compressor, fan, circulation pump, etc
  • Urban water supply: Water delivery pump, water intake pump, water supply pump, sewage treatment industry, self-fractionating pump etc
  • Minerals & Mining: Mud pump, ventilation fan, belt conveyor, slurry pump etc
    Others: Loads such as fan, pump and compressor in pharmaceutical, paper making and wind tunnel test.
Especially for: Fan and Pump
Power Plant
Pump, Fans
Steel Plant
Cement Plant
Product Structure
Wanlida Series Medium voltage variable frequency inverter consists of By-pass cabinet, Transformer cabinet, power unit cabinet and controller cabinet from left to right. 

Technical advantages
  • No need of extra output filtering device
  • Directly driving the general medium voltage synchronous or asynchronous motor and the temperature of the motor will not be increased.
  • No need of motor derating operation
  • No dv/dt damage to insulation of motor and cable
  • No torque ripple induced by harmonics, and the service life of motors and mechanism devices can be extended
  • No cable length limited when voltage drop is in the allowable range.
Besides the above advantages, Wanlida medium voltage variable frequency inverter has the following functions and features:
  • Protection of overload, overheat, over-current, open-phase, grounding, over-voltage, negative sequence.
  • Current limited function
  • Interlock protection of control power supply
  • Two sets of control power hot standby for redundancy
  • Power cell by-pass function
  • Control cabinet automatic bypass function
  • Cabinet door opening alarm function
  • Lock-phase function
  • Synchronizing switch function between variable frequency and power frequency (optional)
  • Soft start of motors, no impact to mechanical equipment and network
  • Voltage source High-high variable frequency drive, it can realize No-step speed regulation, which makes the typical motors into intelligent motors.
  • High quality power input: By phase shifting of the secondary winding and multi-pulse diode rectifier, isolated powers can be acquired and supplied for power cells. (18 pulses for 3/3.3kV, 30/36 pulses for 6/6.6kV, 48/54 pulses for 10/11kV) By using the technique of multi-pulse rectifier, the harmonic current could be eliminated greatly.
  • Power cell communicate with controller through optic-fiber, completely electric isolated
  • Inner set PID regulator, can realize running in closed-loop
  • Multiple communication methods with host computer, isolated RS485 interface, standard MODBUS RTU, communication protocol, PROFIBUS DP (optional), industrial Ethernet communication protocol (optional)
  • Accurately fault records, can inquiry information and locate fault
  • Compact construction, reasonable layout (can do customer-design)
  • Very good protective design to dust, ferrum pulveratum, acid mist, moisture etc.
  • Bypass cabinethas a function of "five-protection", meanwhile, it has a pressure relief channel to ensure the safety of operators.
  • Modularized design of power units, interchangeable and easy to produce and repair.

Technical parameters
Series No
HVF Capacity(KVA)
Power of adaptive motor(KW)
Input Frequency(Hz)
Rated input voltage(kV)
3/3.3kV/4.16kV/6/6.6kV/10/11kV (+15%~ -35%)
THDi at power grid
<3% (Permissible value≤4%)
THDu at output side
<3% (Permissible value≤5%)
Input power factor
>0.95%(>20% of rated load)
>97%(under a rated load)
Output frequency(Hz)
Output frequency resolution
Rated output current(A)
Overload capability
120%(1min), 150%(3s), 200%(Immediate protection)
Control mode
V/F control or Vector control
Logical control I/O signal
16 channels respectively
Analog input
Analog output
0~10V/4~20mA Optional (2 channels)
Boolean input/output
Communications/Default point (expandable)
Acc & Dec time (S)
Communication with host
CAN, Profibus, Modbus, RS232, RS485 etc
Cooling mode
Forced air cooling
Storage temperature
Ambient temperature
Ambient humidity
95%, no condensation
Protection grade
Factory Acceptance Test Platform
Wanlida built the first-class high voltage and big capacity medium voltage variable frequency inverter test platform to realize Factory full load test before delivery.

Service Process

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