Static Overcurrent Relays and Its Types | Devices | Electrical Engineering
The overcurrent relays, even though simplest of all types of electromechanical relays, are the most difficult static relays. This is because the induction disc characteristics of the overcurrent relays (inverse characteristics) are not amenable to simple mathematical analysis. The first static relays developed were the high speed differential relays and the distance relays. Fault current level detectors are termed overcurrent [...]