23-06-21 Relay

Relay:- Relay is nothing but an electrical switching circuit.

Relay is a monitoring & sensing device.

The function of a realy is to monitor the parameters & sense any abnormalities in the circuit.

Realy control electrical circuit by opening & closing contacts in another circuit.

Relay does not trip any circuit, Relay sends a command or signal to the Circuit Breaker for tripping purpose.

Relay symbol

Types of Relay:- 

1) Electro thermal realy

2) Electro mechanical relay

3) Solid state relay

4) Hybrid relay

5) Polarized relay

6) Non polarized relay

7) Buchholz relay

Relay