Main Features of Good Protective Devices

Main Features of Good Protective Devices Points : main features of good protective devices (i) Sensitivity. The protective system should be sensitive that it should operate for low values of fault current.
(ii) Selectivity. The protective system should select correctly the faulty part of the power system and disconnect the same without disturbing the rest of the system.
(iii) Reliability. The protective system should operate definitely under predetermined condition.
(iv) Quickness. The protective system should be such that it should respond quickly in order to improve quality of service, increase safety & life of equipment and increase stability of operation.