System 3000 speed controller insert - Speed controller for controlling the speed of single-phase motors such as induction or shaded-pole motors. - Device works according to the phase control principle. - Switching on to maximum speed using soft start. - Minimum speed can be stored permanently. - Connection of extensions possible. - Electronic short-circuit protection. - Electronic overtemperature protection. - Operation with and without neutral conductor connection. If the ambient temperature is higher than +25 °C, the connected load must be reduced.