Different Types of Relays and their Working
A relay is a switching device and it work is to change the state of an electric circuit or electric current from one state to another. Relays are classified according to their working and structure. Well, known categories include protective, regulating, reclosing, auxiliary and monitoring relays. Protective relays monitor these parameters: current, voltage, and power; and if these parameters violate from mentioned limits they generate an alarm to inform the situation of the circuit.