Comparing Dry Type and Oil Filled Transformers

Transformers are essential components in electrical systems, as they help to regulate voltage Levels and ensure the safe and efficient transmission of electricity. When it comes to transformers, there are two main types that are commonly used: dry type transformers and oil-filled transformers. In this article, we will compare these two types of transformers and discuss their advantages and disadvantages.

Dry type transformers, as the name suggests, do not use oil as a cooling medium. Instead, they rely on air to dissipate heat and keep the transformer cool. This makes them a popular choice for indoor applications where the use of oil may not be practical or safe. Dry type transformers are also more environmentally friendly, as they do not pose the risk of oil leaks or spills.

On the other hand, oil-filled transformers use oil as a cooling medium to dissipate heat generated during operation. The oil helps to transfer heat away from the transformer windings, keeping them cool and ensuring efficient operation. Oil-filled transformers are typically used in outdoor applications or in areas where fire Safety is a concern, as the oil helps to suppress any potential fires that may occur.

Type Rating capacity (KVA) No-load losses(W) Voltage combination (KV) Load losses(W) No-load current (%) Short-circuit voltage (%)
S11-M-30 30 100 6,6.3,10,10.5,11/0.4 600 2.3 4.0
S11-M-50 50 130 6,6.3,10,10.5,11/0.4 870 2.0 4.0
S11-M-63 63 150 6,6.3,10,10.5,11/0.4 1040 1.9 4.0
S11-M-80 80 180 6,6.3,10,10.5,11/0.4 1250 1.9 4.0
S11-M-100 100 200 6,6.3,10,10.5,11/0.4 1500 1.8 4.0
S11-M-125 125 240 6,6.3,10,10.5,11/0.4 1800 1.7 4.0
S11-M-160 160 280 6,6.3,10,10.5,11/0.4 2200 1.6 4.0
S11-M-200 200 340 6,6.3,10,10.5,11/0.4 2600 1.5 4.0
S11-M-250 250 400 6,6.3,10,10.5,11/0.4 3050 1.4 4.0
S11-M-315 315 480 6,6.3,10,10.5,11/0.4 3650 1.4 4.0
S11-M-400 400 570 6,6.3,10,10.5,11/0.4 4300 1.3 4.0
S11-M-500 500 680 6,6.3,10,10.5,11/0.4 5100 1.2 4.0
S11-M-630 630 810 6,6.3,10,10.5,11/0.4 6200 1.1 4.5
S11-M-800 800 980 6,6.3,10,10.5,11/0.4 7500 1.0 4.5
S11-M-1000 1000 1150 6,6.3,10,10.5,11/0.4 10300 1.0 4.5
S11-M-1250 1250 1360 6,6.3,10,10.5,11/0.4 12800 0.9 4.5
S11-M-1600 1600 1640 6,6.3,10,10.5,11/0.4 14500 0.8 4.5
S11-M-2000 2000 2280 6,6.3,10,10.5,11/0.4 17820 0.6 5.0
S11-M-2500 2500 2700 6,6.3,10,10.5,11/0.4 20700 0.6 5.0
S11-M-30- 30 90 20,22/0.4 660 2.1 5.5
S11-M-50- 50 130 20,22/0.4 960 2 5.5
S11-M-63- 63 150 20,22/0.4 1145 1.9 5.5
S11-M-80- 80 180 20,22/0.4 1370 1.8 5.5
S11-M-100- 100 200 20,22/0.4 1650 1.6 5.5
S11-M-125- 125 240 20,22/0.4 1980 1.5 5.5
S11-M-160- 160 290 20,22/0.4 2420 1.4 5.5
S11-M-200- 200 330 20,22/0.4 2860 1.3 5.5
S11-M-250- 250 400 20,22/0.4 3350 1.2 5.5
S11-M-315- 315 480 20,22/0.4 4010 1.1 5.5
S11-M-400- 400 570 20,22/0.4 4730 1 5.5
S11-M-500 500 680 20,22/0.4 5660 1 5.5
S11-M-630 630 810 20,22/0.4 6820 0.9 6
S11-M-800 800 980 20,22/0.4 8250 1.8 6
S11-M-1000 1000 1150 20,22/0.4 11330 0.7 6
S11-M-1250 1250 1350 20,22/0.4 13200 0.7 6
S11-M-1600 1600 1630 20,22/0.4 15950 0.6 6

One of the main advantages of dry type transformers is their low maintenance requirements. Since they do not use oil, there is no need for regular oil testing or replacement, which can save time and money in the long run. Dry type transformers are also more compact and lightweight than oil-filled transformers, making them easier to install and transport.

However, dry type transformers are not without their drawbacks. They are generally less efficient than oil-filled transformers, as air is not as effective at dissipating heat as oil. This can Lead to higher operating temperatures and reduced efficiency, which may result in increased energy costs over time. Additionally, dry type transformers are more susceptible to damage from moisture and contaminants, which can shorten their lifespan and require more frequent maintenance.

Oil-filled transformers, on the other hand, are known for their high efficiency and reliability. The oil helps to keep the transformer cool and ensures optimal performance under heavy loads. Oil-filled transformers also have a longer lifespan than dry type transformers, as the oil helps to protect the windings from moisture and contaminants that can cause damage over time.

However, oil-filled transformers do require regular maintenance to ensure that the oil is clean and free of contaminants. This can be a time-consuming and costly process, as the oil may need to be tested and replaced periodically to maintain optimal performance. Oil-filled transformers are also larger and heavier than dry type transformers, which can make them more difficult to install and transport.

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In conclusion, both dry type and oil-filled transformers have their own set of advantages and disadvantages. The choice between the two will ultimately depend on the specific requirements of the application and the preferences of the user. Whether you choose a dry type transformer or an oil-filled transformer, it is important to work with a reputable supplier who can provide high-quality products at a competitive price. China is known for its manufacturing capabilities and has many factories that produce transformers of all types. By working with a China factory, you can benefit from cut-price deals and access to a wide range of products. Many suppliers also offer videos and other resources to help you make an informed decision about which type of transformer is right for your needs.