A metadyne unit consists of a rotating machine, which converts the constant voltage supplied by the battery to a constant current, which feeds the motor.

Some multiswitches only have two inputs, in this case, depending on the voltage supplied by the receiver; either horizontal or vertical polarisation is selected.

The typical voltages supplied are:

However, the average voltage supplied from the national grid (in mainland UK) is 242V, compared to the nominal European voltage of 230V.

For USB 3.0, the voltage supplied by low-powered hub ports is 4.45-5.25 V.

Gases in the bulb are preheated by an initial boost of high voltage supplied by the ballast; the ballast then reduces the charge to keep the bulb lighted.

The voltage supplied is a compromise between operational needs for reliable service and safety precautions for customers and service personnel.

Common voltages supplied by power companies to consumers are 110 to 120 volts (AC) and 220 to 240 volts (AC).

The increased voltage supplied by the transformer, at least 2,000 V, is applied across the two wire-mesh grids.

Equipment with high-powered motors or internal transformers designed to operate at 60 Hz may overheat at 50 Hz even if the voltage supplied is correct.