Kisung Electric Machinery (KEM) is always trying to pay attention to safety, convenience of the product and saving cost based on our long field experiences with long R&D effort. Our KEM’s Air Circuit Breaker, Auto Transfer Switch, Smart Switch Board, OCR and controller are part and parcel as a main part of the electric power equipments. It is our pride to keep researching and developing high quality products to ensure the safety of the electric power equipments by combining our perfect know-how of Over Current Relay (OCR) which is the brain of the protective unit. We commit ourselves to satisfying all of your requirements including the quality and price with the environment-friendly design and compact size.