Transformers

2. Step-Down Transformers

Unlike step-up transformers, step-down transformers reduce high voltage to a lower level. These are primarily used in applications that require low voltage but high current. Their most common usage is in residential areas and small commercial establishments.

3. Three-Phase Transformers

Many industrial and commercial machines operate on three-phase power systems. Using three single-phase transformers in such setups is inefficient, which is why three-phase transformers are necessary for optimal performance. The design of these transformers varies depending on voltage requirements, leading to the availability of both step-up and step-down three-phase transformers.

4. Auto-Transformers

Auto-transformers differ from conventional transformers as they do not have two separate windings. Instead, they share a common winding without electrical isolation. These transformers are more compact and cost-effective than traditional ones. They are commonly used for voltage adjustments in devices like voltage regulators, railway audio systems, and other electrical applications.

5. Dry-Type and Oil-Cooled Transformers

Dry-type transformers use air for cooling, which passes through vents or fans to dissipate heat. These are widely used in industries such as wind power, chemicals, and gas. On the other hand, oil-cooled transformers use mineral oil for heat dissipation. The oil circulates through radiators or heat exchangers, ensuring efficient cooling. These transformers are typically found in solar power plants, manufacturing industries, and the automotive sector.

Apart from these, various other types of transformers exist, including outdoor and indoor power transformers, core-type transformers, shell-type transformers, and berry-type transformers.