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Wanlida Medium Voltage Motor Soft Starter - China

price: contact company for price

Wanlida frequency converters will be your best energy saving

product for motors, good product will save more money for


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


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.

Working Principle

WLD-HVF series medium voltage inverter adopts Power Units in

series and overlapping technology to obtain MV directly by

means of overlap wave. Low voltage power unit is an actually

improved motor variable frequency inverter, which takes full

advantage of mature technology. WLD-HVF belongs to High-high

voltage source inverter, the customer can connect high

voltage (3/6/10KV) directly to WLD-HVF, then WLD-HVF output

high voltage (3/6/10KV) correspondingly. WLD-HVF consists of

phase-shifting transformer, power unit cabinet and

controller, for example:

6KV Series: Consisting of 15 AC power units with 690V. Every

5 power units are connected in series to form one phase

(phase voltage 3450V), 3-phase Y-type connection, so the

Line voltage can reach to 6KV.

From the above, different voltage output, the quantity of

power units is different, but the working theory is exactly

identical. All power units receive the indicator from same

central process controller. There is a phase difference in

secondary windings of transformer which provide energy for

power unit, in this way, most of the harmonics current

caused by independent power unit will be eliminated, so the

primary winding current is approximately sine wave, the

harmonics current flowing into power grid are so few, even

under the rated load, the harmonics contents is lower of 3%.

The power unit is AC-DC-AC structure, equivalent to a low-

voltage power source inverter of 3-phase input single-phase

output. The rectifier side is diode three-phase full bridge

circuit and the IGBT inverter bridge can be controlled

through sine PWM mode to output single-phase AC. All power

units are fully identical in structure and electrical

performance, very easy for maintenance and replacement.

Technical Features

Voltage source High-high frequency inverter, it can realize

No-step speed regulation, which makes the typical motors

into intelligent motors.

Low harmonics input and high power factor, the typical value

for power factor is 0.95 through whole speed regulation,

even more higher, no need for power factor compensation.

WLD-HVF output few harmonics, the motor does not generate

extra heat and noise.

Modularized design of power units, interchangeable and easy

to produce and repair, the equipment can find any fault

exactly based on advanced diagnostic procedures in MPU.

The inverter still can operate even the faults for part of

power units exists, if there are faults happen for inverter,

the system can switch to power frequency through bypass


Applicable to all kinds of power grid at home and abroad and

suitable for typical high voltage motor.

Colorful touch screen, easy to operate and maintenance.

Able to realize remote control, DCS operation and

communications with Host, and support all kinds of

communications interfaces such as CAN, Profibus, Modbus,

RS232, RS485 etc.

Applied latest components, master control chip adopted TI’s

DSP F28335 and ALTERA’s FPGA of EP3C to realize powerful

processing capacity; Sampling adopted AD’s AD7606 with 16

bit to ensure control accuracy of the system.

The switchgear can satisfy safety requirements, and the

pressure-relief channel of high voltage switch can ensure

safe use of operators.

Company Contact:

  • Phone: 867563395623

  • Address: Wanlida Relay Protection Industrial Park, No. 1 Te, Zhuhai, China

  • Email: Email

Published date: August 22, 2013 -

  • Business Description: Incorporated in 1991, Zhuhai Wanlida Electric Co., Ltd. (www.zhwld.com)

    ('the Company'), is located in Relay Protection Industrial Park, No.1

    Technology Road, Science and Technology Innovation Coast, High tech

    Zone, Zhuhai City, coving a land area of approximately 60 thousand

    square meters (including Park 1 and Park2). The Company was listed for

    equity financing on November 13, 2007 (equity securities abbreviated as:

    Wanlida stock certificates, code: 002180), with a registered capital of

    124,980,000 Yuan. The Company keeps on her aggressive 'production,

    study, research and application' co operation with the famous academies

    such as Tsinghua University, Chinese Academy of Sciences and Central

    China University of Science and Technology and carries out relevant

    technology innovation. It is a national high tech enterprise that deals

    with specialized development, production and sales of substation

    integrated automation systems and Medium voltage variable frequency

    drives, Medium voltage magnetically controlled soft starters, Static

    synchronous compensator(STATCOM/SVG), Static VAR compensator(SVC),

    Active power filter(APF/AHF), Thyristor switched capacitor bank

    (TSC/TSF), High voltage direct current light transmission systems etc

    power electronic equipments. In addition, the Company is known as a

    famous manufacturer and backbone enterprise of transformer substation

    integrated automation and power electronic equipments fields in China,

    and it also acts as fresh blood in the field of energy conservation and

    emission reduction.

    Wanlida passed the ISO9001 quality system certification, ISO14001 Environment Management System Certification and OHSMS18001 Occupation Health &Safety Management System Certification; All products passed the test of sated authoritative inspection bureau. And it had been rated as 'National High and New Technology Enterprise', 'Enterprise Recommended by State Economic and Trade Commission for Reconstruction of Urban and Rural Electric Grids', 'Key Software Enterprise Covered by National Program', 'Excellent enterprise of China', 'First choice Manufacturer for Electric Framework Protocol Sponsored by CNPC', 'Excellent Enterprise of Guangdong Province', 'Optimum Good faith Enterprise of Guangdong Province', 'Contract honoring Enterprise of Guangdong Province', 'Top 10 Private Enterprises of Zhuhai City', and 'Enterprise with Grade AAA Bank Credit '.

    Wanlida has a very strong R&D teamwork which has a population of over 100 with doctor's degree, postgraduate degree and bachelor's degree etc, and all of the products are designed strictly according to IEC standards; Wanlida has modern standard workshops, it brought advanced SMT production lines and wave soldering machines into company from abroad, and built the first class high voltage and big capacity power electronic equipments assembling and test platform, which is able to realize full load test and ensure that all of products have exquisite technics and reliable quality; At present, Wanlida covers all of domestic areas except Hongkong, Macau and Taiwan, and it also sells the products to Southeast Asia, Middle East, South America, Africa etc over 20 countries.

    The Company aims to grow into the most dedicated electric automation enterprise in the world, and commits itself to building the aircraft carrier of power electronic energy efficiency products.

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