Protection relays constantly monitor the power network and trip the circuit breakers to isolate the faulty portion under fault conditions: overload, short-circuit, insulation fault. The Sepam range of protection relays is designed for all protection applications in medium-voltage public and industrial distribution networks. It is made up of four series of relays with increasing performance levels: Sepam series 10 for simple applications. Sepam series 20 for usual applications. Sepam series 40 for demanding applications. Sepam series 80 for custom applications