For example, an overcurrent protective relay may have a AC to DC power supply for the input circuit, a level detector circuit and an RC time delay circuit.
2.
For example, in an induction type electromechanical relay, the time delay for the switching action can be adjusted by adjusting the distance traveled by the disc, whereas in a static relay the delay can be set by adjusting the value of the resistance in an R-C time delay circuit.
मोबाइल