Reduced Voltage Motor Starting Panels(RVMS) are designed to be used in the startup of squirrel cage induction and synchronous motors.

An RVMS Panel reduces the torque by temporarily reducing voltage and/or current input. Voltage applied to the motor during start up is reduced, resulting in lower starting currents from the connected grid.

One way to limit the motor starting current is by placing an auto-transformer in series with the motor during startup. The transformer action reduces the voltage applied to the motor terminals, causing a decrease in current at startup.They are designed as per the standard voltage taps of 50%, 65% and 80%.