Static relay

The conventional relay type of electromagnet relays can be replaced by static relays which essentially consist of electronic circuitry to develop all those characteristics which are achieved by moving parts in an electro-magnetic relay.

For example, in an induction type relay, the operating time can be adjusted by adjusting the distance travelled by the disc whereas in a static relay it can be achieved by adjusting the value of the resistance in the R-C time delay circuit. In other words static relays are capable of performing the same functions with the use of electronic circuit control as an electro-magnetic relay performs with the use of moving parts or elements.