Difference between dry type transformer and oil immersed transformer
Writer： Hengfeng you electric Time：2023-04-03 views：times
1. Different appearance and packaging forms
Dry type transformer can directly see the iron core and coil, while oil immersed transformer can only see the transformer shell.
2. Different lead forms
Most dry-type transformers use silicone rubber bushing, while most oil immersed transformers use magnetic bushing.
3. Different capacity and voltage
Dry type transformers are generally suitable for power distribution. Most of them have a capacity of less than 1600 KVA and some have a voltage level of 35 kV below 10 kV. However, oil immersed transformers can achieve all the capacity from small to large. The voltage level page has achieved all the voltage. The UHV 1000 kV experiment under construction in China, The line must be an oil immersed transformer.
4. Insulation and heat dissipation are different
The transformer is generally resin insulated and cooled by natural air, and the large capacity is cooled by fan. The oil immersed transformer is insulated by insulating oil, and the heat generated by the coil is brought to the radiator of the transformer for heat dissipation by the circulation of insulating oil in the transformer.
5. Different applicable places
Dry type transformers are mostly used in places where fire prevention and explosion-proof are required. Generally, they should be used in large buildings and high-rise buildings. Oil immersed transformers are mostly used outdoors where accident oil pools are dug because oil may eject or leak after an accident, resulting in fire.
6. Different load bearing capacity
Generally, dry-type transformer should operate under rated capacity, while oil immersed transformer has better overload capacity.
7. Different cost
For transformers with the same capacity, the purchase price of the dry-type transformer is much higher than that of the oil immersed transformer. The model of the dry-type transformer generally starts with SC (epoxy resin casting encapsulated type), SCR (non epoxy resin casting solid insulation encapsulated type) and SG (open type)
The above information is provided by Qingdao hengfengyou Electrical Engineering Co., Ltd. for more details, please contact: hfy@hengfengyou.com
