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Medium Voltage Adjustable Frequency Drive - China

price: contact company for price

Wanlida Adjustable Frequency Drive will be your best energy

saving product for motors, good product will save more money

for you.

Wanlida medium voltage adjustable frequency drive

Product Structure

Wanlida Medium voltage adjustable frequency drive consists

of By-pass cabinet, Transformer cabinet, power unit cabinet

and controller cabinet from left to right.

Working Principle

Wanlida medium voltage adjustable frequency drive adopts

multi-level cascaded power unit technology to obtain MV

directly by means of overlap wave. Low voltage power unit is

an actually improved motor variable speed drive, which takes

full advantage of mature technology. Wanlida adjustable

frequency drive belongs to High-high voltage source

inverter, the customer can connect medium voltage

(3/3.3/4.16/6/6.6/10/11KV) directly to input terminal of

VSD, and then Wanlida adjustable frequency drive output

medium voltage (3/3.3/4.16/6/6.6/10/11KV) correspondingly,

no need output step-up transformer.

Technical parameters





HVF Capacity



Power of adaptive motor



Input Frequency



Rated input voltage

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(Option)


Cooling mode

Forced air cooling


Storage temperature



Ambient temperature



Ambient humidity

95%, no condensation


Protection grade





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.

Factory Acceptance Test Platform

Wanlida built the first-class high voltage and big capacity

adjustable frequency drive test platform to realize Factory

full load test before delivery.

Company Contact:

  • Phone: 867563395623

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

  • Email: Email

Published date: August 23, 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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