Advantages and disadvantages of oil immersed transformer and dry-type transformer
Writer： Hengfeng you electric Time：2023-04-23 views：times
Distribution transformer is one of the important equipment in power supply and distribution system of industrial and mining enterprises and civil buildings. It reduces the 10 (6) kV or 35kV grid voltage to the 230/400V bus voltage used by the user. This type of product is applicable to AC 50 (60) Hz, three-phase maximum rated capacity 1000mkVA (single-phase maximum rated capacity 833kVA, single-phase transformer is generally not recommended), and can be used indoors (outdoors). When the capacity is 315 kVA and below, it can be installed on the pole. The ambient temperature is not higher than 40, not lower than - 25, and the daily average maximum temperature is 30. If it is not in conformity with the above service conditions, appropriate quota adjustment shall be made according to the relevant provisions of GB6450-86.
Oil immersed transformer is a new type of high-performance transformer, which uses oil as the main insulation method of transformer. Its main components are composed of iron core, winding, radiator, etc., and are widely used in the power industry. Dry type transformer is a kind of transformer whose iron core and winding are not immersed in insulating oil. It is mainly composed of iron core and coil, and has the advantages of strong short circuit resistance, small volume, low noise, etc. Next, the advantages and disadvantages of oil immersed transformer and dry-type transformer are introduced in detail:
1. Advantages and disadvantages of oil immersed transformer and dry-type transformer:
(2) In terms of capacity, large capacity oil transformers are more than dry type transformers.
(3) Dry type transformers are required for comprehensive buildings (basements, floors, roofs, etc.) and places with many people. Oil immersed transformers are used in independent substations.
(4) The box type transformer generally adopts dry type transformer. Outdoor electricity is generally oil immersed transformer.
(5) During the construction, dry transformer and oil transformer shall be selected according to the space, oil transformer can be selected when the space is large, and dry transformer can be selected when the space is crowded.
(6) The regional climate is humid and hot, which is easy to change with oil. If drying is used, forced air cooling equipment must be provided.
2. Difference between oil immersed transformer and dry-type transformer
(1). Appearance
Different packaging forms, dry-type transformers can directly see the iron core and coil, while oil immersed transformers can only see the transformer shell;
(2). Different forms
Most dry-type transformers use silicone rubber bushings, while oil immersed transformers use ceramic bushings;
(3). Different capacities and voltages
Dry type transformers are generally suitable for power distribution. Most of the capacity is below 1600KVA, the voltage is below 10KV, and some of the voltage levels are 35KV. The oil immersed transformer can achieve all capacities and voltage levels from small to large.; The UHV1000KV test line under construction must be oil immersed transformer.
4. Insulation and heat dissipation are different.
Resin insulation is generally adopted for dry-type transformer, which is cooled by natural air and large capacity transformer fan. Oil type transformer is insulated by insulating oil, which circulates inside the transformer to radiate the heat generated by the coil to the radiator (sheet) of the transformer.
5. Applicable places
Dry type transformers are often used in places where fire and explosion protection is required, and are generally easy to be used in large buildings and high-rise buildings; Oil immersed transformers are mostly used outdoors.
6. Different load carrying capacity.
Generally, dry-type transformers shall operate at rated capacity, while oil immersed transformers have better overload capacity.
7. The fees are different.
For transformers with the same capacity, the purchase price of dry-type transformers is much higher than that of oil immersed transformers.
Hengfengyou Electric has successfully entered the electricity market of Uzbekistan in 2018. Transformer products such as 10KV distribution transformer, 35KV distribution transformer, 35KV furnace transformer and 35KV rectifier transformer specially customized for Uzbekistan have participated in the bidding of many local projects and are favored by local electrical engineering companies in Uzbekistan. Thirty years of manufacturing experience. Quick quotation and quick delivery. Hengfengyou Electric will provide you with the best electrical product solutions. 【WhatsApp：+86158 5325 2696（Jack） +86158 5326 5269（Alisa） info@hengfengyou.com https://www.hengfengyou.com 】
