The S811+ from Eaton's Moeller series is one of the world's smallest and most compact soft starters. The devices are available in five sizes, with rated currents from 37 A to 850 A and mains voltages from 200 V to 690 V. Thanks to the three-phase control system, the internal bypass and the extensive monitoring and protection features, the S811+ ensures smooth starts and safe continuous operation, even in applications with high load torques. A digital operating and display panel enables advanced functions for more sophisticated applications. The special pump-control algorithm with prolonged soft-stop ramp effectively prevents water hammer when stopping a pump. In addition, both in-line and delta configurations are possible. As the S811+ only has to handle about 58 % of the rated motor current, it is possible to use a much smaller device than would otherwise be the case.