Dry type transformer and oil-immersed transformer are actually very easy to distinguish, for example, in the price, dry type transformer is more expensive than oil-immersed transformer, in the capacity, large capacity of oil-immersed transformer than dry transformer capacity. Dry transformers are required in basements, floors and crowded places of comprehensive buildings, while oil-immersed transformers are required in substations. Box transformer used in the transformer, outdoor temporary use oil transformer. In the humid and hot regions, oil-immersed transformer and forced air cooling equipment are adopted. The following small series of dry transformer and oil - immersed transformer on the difference.
First of all, dry transformers are different from oil-immersed transformers in terms of encapsulation. Dry transformers can directly see the iron core and coil, while oil transformers can only see the transformer shell.
Secondly, dry transformers are different from oil transformers in the form of leads. Most dry transformers use silicon rubber bushing, while most oil transformers use porcelain bushing. Dry type transformer is generally suitable for distribution, the capacity is mostly below 1600KVA, the voltage is below 10KV, also some do 35KV voltage level; But the oil type transformer may achieve the entire capacity from small to big, the voltage grade also achieves all voltages; The uhv 1000KV test line under construction in China must be an oil-type transformer. Dry type transformer USES colophony insulation commonly, rely on natural air cooling, large capacity relies on fan cooling however, and oil type transformer relies on insulation oil to undertake insulation, rely on insulation oil to circulate the tropics that coil produces in transformer interior to transformer radiator (piece) undertake come loose heat.
Third, the dry type transformer is mostly used in the need of "fire, explosion-proof" places, generally large buildings, high-rise buildings easy to use; And oil type transformer because "after having an accident" may have oil gush or leak, cause fire, mostly apply outdoor, and the place that field ground ditches set "accident oil pool". Generally, dry type transformer should operate at rated capacity, while oil type transformer has better overload capacity.
Finally, the cost of dry transformers is different from that of oil transformers. For the same capacity transformers, the purchase price of dry transformers is much higher than that of oil transformers. The models of dry type transformers generally start with SC (epoxy resin castable encapsulation type), SCR (non-epoxy resin castable solid insulation encapsulation type) and SG (open type).
In a word, both dry-type transformer and oil-immersed transformer have advantages and disadvantages. Oil-type transformer is low in cost, convenient in maintenance, but combustible and explosive. Dry transformers can be installed in the load center to reduce voltage loss and power loss due to their good fire resistance. But dry change high price, volume, moisture and dust poor, and noise.
Main products: baoding dry type transformer, baoding box type transformer, baoding oil immersed transformer, baoding high and low voltage complete sets of equipment, etc. I companies to follow "detail decides success or failure, honesty molded the future" of the enterprise purpose, adhere to "quality measuring market, seek development by innovation, to management for efficiency" business philosophy, to make my company's products are widely used in power plant, chemical, construction, mining, metallurgy, rail transportation and other industries, to meet the needs of various users, my company rely on superior product quality, thoughtful service, won the trust of our customers.
