Electrical Apparatus and Devices

is a static device by means of which electrical power is transformed from one alternating-current circuit to another with the desired change in voltage and current without causing any change in frequency.

This winding is excited or energized by connecting it to an input source.

This winding is the one to which the electrical load is connected and from which the output energy is taken.

each winding consists of two sections—one section placed on each of the two legs of the core—and the primary and secondary windings are arranged to be concentric coils.

the windings usually consist of thin “pancake” coils assembled in a stack, with primary and secondary coils interleaved.

have simple natural air cooling or are sometimes sealed into cabinets filled with nitrogen.

The physical basis of a transformer between two circuits linked by a common magnetic flux.

is a lossless device with an input winding and an output winding.