What is an Oil Immersed Transformer?

Transformers change an alternating current (AC) to a higher or lower voltage. A current may need to move to a higher voltage as higher voltages are easier and faster to transport. A current may need to decrease its voltage in residential, commercial, and industrial areas.

One type of transformer is an oil-immersed transformer. Transformers often operate in high-energy, high-heat situations. An oil-filled transformer suspends the transformer of a steel tank filled with oil. The oil cools and insulates the transformer. The device uses convection to move the oil around and through the transformer, cooling it off.

To avoid oil deterioration, transformer oil must be kept at an operating temperature of less than 85°C. For the transformer to run correctly and to prevent excessive oil deterioration, the daily average operating temperature should be around 30°C.

Company Advantages

JiangsuYawei transtormers have been successtuly exported to severa countries incuding the United Stotes, Canada, Panama, Venezuela, Uzbekistan,Australia,and Bulgaria. We have sufficient production capacity to ensure that goods can be delivered on time. We have professional after-sales teams around the world, this ensures prompt trouble shooting and resolution of any issues you may encounter.

Whether you are a utlity company, transformer distributor, or builder, you can purchase JiangsuYawei's power transformer with confidence,knowing that you are investing in a reliable and reputabe product.Experience the efficiency and reliablity of JiangsuYawei Transtormer tailored to meet your specific needs.

Products Parameters

Technical data of S11 series 35kV Loss-lors and non-exciting regulation transformer

Rated Capacity (kVA)	Voltage Combined			Vector-group	No-load Loss (w)	Load loss (w)75℃	No-load curren t(％)	Short-circuitImpendance (％)
Rated Capacity (kVA)	HV(kV)	Tapping Ranges	LV (kV)	Vector-group	No-load Loss (w)	Load loss (w)75℃	No-load curren t(％)	Short-circuitImpendance (％)
630	35	±5％	3.156.310.5	Yd11	830	7870	1.10	6.5
800					980	9410	1.00
1000					1150	11540	1.00
1250					1410	13940	0.90
1600					1700	16670	0.80
2000					2180	18380	0.70
2500					2560	19670	0.60
3150	35~38.5	±5％	3.156.310.5		3040	23090	0.56	7.0
4000					3620	27360	0.56
5000					4320	31380	0.48
6300					5250	35060	0.48	7.5
8000	35~38.5	±2×2.5％	3.153.36.36.610.511	Ynd11	7200	38480	0.42
10000					8700	45320	0.42
12500					10080	53870	0.40	8.0
16000					12160	65840	0.40
20000					14400	79520	0.40
25000					17020	94050	0.32
31500					20220	112860	0.32

Products Advantages

Oil-immersed transformers are more affordable. They are often up to half the price of a dry-type transformer with the same capacity.

Oil-immersed transformers tend to be more successful at cooling the transformer than a dry type. Oil is a better cooling medium. They also have a higher voltage capacity. Dry-type transformers operate below 35 kV, while there are no limits with oil-immersed. Oil transformers are more versatile.

Dry-type can typically go from an intermediate location to the power consumption source. Oil-immersed can function as both power and distribution transformers.

Oil-filled transformers are better for the environment, as they are much easier to recycle than dry-type. They are also smaller and work best in outdoor environments in case of an oil spill or other accident.

Applications

Utilities today seek to create and connect new sources of power generation to meet growing global demand, while also managing grid reliability, costs and regulatory factors.