Power transformers convert power-level voltages from one level or phase configuration to another.

Current sense transformers are used to detect and measure current.

Cast coil transformers have windings that are solidly-cast in resin under a vacuum in a mold.

Toroidal transformers typically consist of copper wire wrapped around a cylindrical core.

Distribution transformers are pole-type transformers that supply relatively small amounts of power to residences.

Voltage and potential transformers are used to measure voltage in electric circuits.

Switch mode transformers (switching transformers) are used mainly in switching power supplies and DC-DC converters.