Protection relay cabinets are used to protect electrical power systems from damage caused by overloads, short circuits, and other abnormal conditions. Based on Operating Principle Electromechanical Relays: Work using moving parts and electromagnetic forces (traditional. Selectivity is a mandatory requirement for all protection, but the importance of it depends on the application. We work with plant operators, utilities, OEMs, EPCs, Data Centers and integrators to engineer panels that meet strict performance, safety, and compliance expectations. They are typically designed to detect and respond to these types of faults quickly and effectively, preventing any potential harm to people or.