Siemens new SDV-R medium-voltage outdoor distribution circuit breaker, an extension of the reliable SDV family, is designed to be your optimal solution for renewable applications. With an integral fast-acting grounding switch mechanically interlocked with a circuit breaker, the SDV-R provides fast switching time to ground, which limits transient voltage excursion to low levels, eliminates the need for ground transformers saving you money and physical space, and removes the risk of transformer oil spills.