Types of Transformers: Dry Type and Oil Immersed

Transformers play a critical role in electrical systems, and understanding the differences between dry type and oil immersed transformers is essential for selecting the right equipment. Dry type transformers are insulated with air and do not require any liquid for cooling purposes. This makes them safer in environments where fire hazards are a concern. They are often used in indoor applications due to their ability to operate in confined spaces without the risk of oil leaks.

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On the other hand, oil immersed transformers use mineral oil as an insulating and cooling medium. This type of transformer is typically more efficient for high-capacity applications, as the oil can effectively dissipate heat. Oil immersed transformers are commonly found in substations and outdoor installations where they can be safely maintained and monitored. Each type has its own advantages, making it crucial to assess the specific needs of your project before making a decision.

Ground Mounted Transformers

Ground mounted transformers are designed specifically for outdoor applications, providing reliable power distribution in various settings. These transformers are often placed on concrete pads or within protective enclosures to ensure durability against environmental factors. Their design allows for easy access and maintenance, which is essential for ensuring optimal performance.

In China, manufacturers have focused on producing high-performance ground mounted transformers that meet international standards. The advancements in technology have led to improved efficiency and reduced energy losses in these units. Furthermore, they are engineered to withstand harsh weather conditions, making them a popular choice for utility companies and industrial applications alike.

TypeRated capacity (KVA)Voltage combination(KV)No-load losses(W)Load losses(W)No-load Current (%)Short-circuit impedance (%)
SH15-M-30306,6.3,10,10.5,11/0.4336301.504.0
SH15-M-50506,6.3,10,10.5,11/0.4439101.204.0
SH15-M-63636,6.3,10,10.5,11/0.45010901.104.0
SH15-M-80806,6.3,10,10.5,11/0.46013101.004.0
SH15-M-1001006,6.3,10,10.5,11/0.47515800.904.0
SH15-M-1251256,6.3,10,10.5,11/0.48518900.804.0
SH15-M-1601606,6.3,10,10.5,11/0.410023100.604.0
SH15-M-2002006,6.3,10,10.5,11/0.412027300.604.0
SH15-M-2502506,6.3,10,10.5,11/0.414032000.604.0
SH15-M-3153156,6.3,10,10.5,11/0.417038300.504.0
SH15-M-4004006,6.3,10,10.5,11/0.420045200.504.0
SH15-M-5005006,6.3,10,10.5,11/0.424051400.504.0
SH15-M-6306306,6.3,10,10.5,11/0.432062000.304.5
SH15-M-8008006,6.3,10,10.5,11/0.438075000.304.5
SH15-M-100010006,6.3,10,10.5,11/0.4450103000.304.5
SH15-M-125012506,6.3,10,10.5,11/0.4530120000.204.5
SH15-M-160016006,6.3,10,10.5,11/0.4630145000.204.5
SH15-M-200020006,6.3,10,10.5,11/0.4750183000.205.0
SH15-M-250025006,6.3,10,10.5,11/0.4900212000.205.0

Cost and Performance Considerations

When evaluating transformers, both cost and performance are vital factors to consider. While dry type transformers may have a higher initial purchase price, their long-term savings in maintenance and operational costs can make them a more economical choice over time. Conversely, oil immersed transformers might offer lower upfront costs but require regular maintenance and inspection to prevent potential issues, such as oil leaks.

TypeRated capacity (KVA)Voltage combination(KV)No-load losses(W)Load losses(W)No-load current (%)Short-circuit impedance (%)
SC10-80080033,35,38/6,6.3,6.6,10,11220094001.16.0
SC10-10001000Voltage combination(KV)2610108001.16.0
SC10-125012506,6.3,6.6,10,11/0.43060119001.06.0
SC10-15001500Voltage combination(KV)3600154001.06.0
SC10-200020006,6.3,6.6,10,11/0.44130182000.97.0
SC10-25002500Voltage combination(KV)4750218000.97.0
SC10-315031506,6.3,6.6,10,11/0.45880245000.88.0
SC10-40004000Voltage combination(KV)6860294000.88.0
SC10-500050006,6.3,6.6,10,11/0.48180349600.78.0
SC10-63006300Voltage combination(KV)9680408000.78.0
SC10-800080006,6.3,6.6,10,11/0.411000460600.69.0
SC10-1000010000Voltage combination(KV)12660565000.69.0
SC10-12500125006,6.3,6.6,10,11/0.415400646000.59.0
SC10-1600016000Voltage combination(KV)18900760000.59.0
SC10-20000200006,6.3,6.6,10,11/0.422400855000.410.0

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Videos showcasing the performance of different transformer types can provide valuable insights into their operation and efficiency. These resources allow potential buyers to see the transformers in action, helping them make informed decisions. Whether you are in need of a cost-effective solution or a high-performance unit, understanding the nuances between these transformers can guide you toward the best option for your needs.