how many type of power transformer?

Power transformers can be categorized into several types based on their design and application. The main types include step-up transformers, which increase voltage levels for transmission; step-down transformers, which decrease voltage levels for distribution; and isolation transformers, which provide electrical isolation between circuits. Additionally, there are auto transformers, which have a single winding and are used for specific voltage adjustments. Each type serves distinct purposes in electrical power systems.