Electronic power sources are electronic devices without any mechanical parts. They are used for generation and setting of different alternating voltages and currents. Different versions enable simultaneous supply from 5 to 80 single-phase or three-phase electricity meters with maximum current up to 120 A or, in a special version, also up to 200 A.

They can be also used for testing of other electrical devices, such as electromotors, motor protection switches, measuring transformers etc.