The SMS series devices are single-phase automatic transfer systems designed and built to guarantee the highest levels of performance.

The STS series devices are three-phase static transfer switch that can automatically or manually switch between two AC power sources, guaranteeing transfer time less than ¼ period. The STS static switches in an energy distribution system provides a safe protection against disturbances of the power sources due to possible discontinuities of the sources themselves or to malfunctions of the distribution line due to environmental phenomena or human errors.