In the development of our country, the dry type transformer price in large and medium cities accounted for 15% of an average of about 20%, and in Beijing, Shanghai, guangzhou, shenzhen and other cities, accounted for about 50%, but as a result of rural power distribution network in our country the application of dry type transformer is relatively small, therefore, on the whole, the dry type transformer of transformer used in 10-15%.
According to the "2013-2017 analysis report on the market demand forecast and investment strategy planning of China's dry transformer industry" by qianzhan industry research institute, there are four types of dry transformers: epoxy resin pouring, filler pouring, wrapping and dipping. At present, Europe and the United States are widely used open ventilation type h-grade dry transformer, which is a new type of h-grade dry transformer developed after absorbing the characteristics of the wrapped structure on the basis of immersion type and adopting Nomex paper. Due to the high price, it has not been popularized in China.
At present, the dry distribution transformer with the largest capacity through short circuit test in China is 2500kVA and 10/0.4kv. The dry type power transformer with the largest capacity through short circuit test is 16000kVA and 35/10kv.
Although the market share of our country is low, but by virtue of its excellent application conditions and performance, the proportion of dry transformer in total output of transformer will rise to some extent. It is estimated that by 2020, the market share of dry power plants in China will reach about 50%, which is similar to that of developed countries. Therefore, the dry power plants in China still have a long way to go.
In 2012, the price output of dry type transformer in China reached 186,0719 kva, which is one of the countries with the largest production and sales of dry type transformer in the world. Dry transformers are now widely used in power stations, factories, hospitals and almost all electrical. With the promotion and application of SC (B) 9 series with low noise (noise of distribution transformer below 2500kVA has been controlled within 50dB) and energy saving (no-load loss reduction of 25%), the performance index and manufacturing technology of dry type transformer in China have reached the world advanced level.
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