20kv three phase double winding distribution transformer with off load tap changer 

Product introduction:
It adopts advanced electromagnetic design software,and meets IEC60076,GB1094,GB/T6451,GB/T25289-2010 standards,without such device like conservator,air breather...,so it ensures that the transformer oil is not 
in contact with air,improving the anti oxidation capacity of the transformer oil and delaying its aging. the core is 
made of high quality cold-rolled grain-oriented silicon steel sheet,with laminated structure miter joint,so as to 
reduce the no-load losses and no-load current. the tank is a corrugated type,the corrugated fins can swell and 
shrink with the change of transformer oil,so that the pressure can be maintained inside the tank,increase its 
reliablility and anti-corrosion capacity.the coil of distribution transformer,wound by high intensity enameled 
wrapped conductors with good ampere-turn balance and reasonable insulation structure. has a strong short-
circuit withstand capacity.the distribution transformer adopts the free-untanking structure. with sealing material
parts made of high quality acrylic rubber,it can effectively prevent againest ligh-aging and heat-aging.

Technical parameters:
Capacity: 30~2500kva 
Voltage :20± 5% or ± 2x2.5%  LV:0.4KV
Vender group:Yyn0 or Dyn11
Impedance:5.5%, 6%
the loss value also apply to high voltage double voltage 20(10) three phase transformers.

Product reference:

Specifications

It has the features of high efficiency and low loss, can save a lot of operation cost

This type of transformer adopts high-permedibility cool-rolling si-steel piece as iron core.It is processed with big
fill factor and there is no spacing inside the mangnetic path. The HV and LV coil is continuously winded around
the core with good concentricity and compact winding. The product is of low con-sumption and slight noise
pollution by combining new generation of technolgy good performance and energy saving. It is widely used in
power distribution system. 

IEC 60076 -1-2-3 2000 Power Transformer

GB1094.1-2-1996 Power Transformer

GB1094.3-5-2003 Power Transformer

GB/T6451-1999 Technical parameters and requirements for three-phase oil-immersed power transformer.

1.   The features of this product are high efficiency and low loss.It can save a lot of operation cost,and the
       social benefits are very significant.
2.   The iron cores are made of the imported high-conduction magnetism,cold-roll,and grain-oriented silicon-
       steel sheets.The iron cores and windings adopt the vacuum drying and vacuum oil-filling processes,which
       make the internal moisture down to the very low level.
3.   The conservator is hermetically sealed,which make the internal running oil to insolate with oxygen and
      moisture efficiently.
4.   The above features guarantee the transformer does not need do replace the oil during the normal
       operation,greatly decrease the maintenance cost,and prolong the service.

Company Introduction

NingboVille Enterprise Co.,Ltd.is a combination of Transformer R&D center, production, sales and after sales service,
possesses of strong technical strength andexcellent manufacturing equipments, as well as modern Office facilities. It 
specially produces large scale power transformer and industrial transformers of high quality and reliability. A large share
 of its resources are devoted to research and development of industrial and special transformers and reactors for any 
special application,such as the iron and steel and electrometallurgical industries.The company main working is suppling,
engineering,designing,manufacturing, executing, and commissioning for transformer .

Why Choose Us

FIRST-CLASS PROCESSING AND TEST EQUIPMENT
We have more than 500 sets of sophisticated, advance production and test equipments, complete and perfect processing 
equipments, and scientific and rational processing technology, which guarantee first-class products, Authorized by the
Bureau of Zhejiang Technology Supervision, Quzhou Fangyuan Inspection Company of Power Transmission and
Transformation Equipment, whick is based on our testing center, undertakes the quality inspection of the industry in our
province, this is a solid guarantee for our excellent product quality.

BEAUTIFUL ENVIRONMENT
We are confident that good products come from good personnel, and good environment makes qualified personnel. The
company is committed to creating a garden-like working environment for employees. We have green belts, modern
standardized workshops and well-planned parks where we sow our youth; we work hard, so we are harvesting the future.

With the first-class quality products, reasonable price and excellent after-sale services.product not only best-selling all
over the country,but also in the international market have higher credit, such as Thailand, Vietnam, Myanmar, Indonesia,
alaysia,Philippines, Ethiopia and Nigeria, Saxonstan, Uzbekistan, Korea, Turkey, Sudan, Iran etc. especially in the steel
enterprises, VILLE production of transformers already have high reputation.

Our advantages:
Quality Assurance
--From the very beginning, VILLE ensures quality in every step to achieve the best quality.
 Experience Sharing
--With more than 30 years' experience in power industry, VILLE brings you an optimized solution.
 Global Service
--Wherever you are, VILLE global network will support and provide you with value.
 Quick Response
--In response to your needs without delay, VILLE  knows the value of your time.

Thanks for choosing VILLE as your reliable partner and
please trust both of us will create a brilliant future!