EMA Electromechanics is the designer and manufacturer of the VDH/GSMI outdoor 38kV combined vacuum circuit breaker and high speed, mechanically interlocked grounding switch, a unique and patented system specifically designed for switching and grounding of wind and solar energy collection circuits. It replaces traditional use of oil insulated grounding transformers combined with conventional circuit breakers in every feeder of a power substation, improving overvoltage mitigation and reducing costs. Concerning LVRT and HVRT requirements for the power generation plants, VDH/GSMI support differentiation between internal and external faults providing a valuable discriminatory function.

EMA Electromechanics, Inc. | www.emaelectromechanics.com