Is A Circuit Breaker A Relay

A relay is a switch used as sensing and controlling device which makes and closes the contacts electronically or electromechanically.

Is a circuit breaker a relay.

Circuit breaker is used for disconnecting or isolating a circuit from the power source or a higher level circuit. Relays and circuit breakers are devices used to stop currents flowing through circuits. A circuit breaker is an automatically operated electrical switch designed to protect an electrical circuit from damage caused by excess current from an overload or short circuit its basic function is to interrupt current flow after a fault is detected. Fundamental difference is that relay is a sensing device where as circuit breaker is a fault interrupting equipment.

Fundamental difference is that relay is a sensing device where as circuit breaker is a fault interrupting equipment. The detailed description of difference between relay and circuit breaker is described below. Relay is also used as a protective device which sense the fault signal and sends to the circuit breaker which make decision to make or break the circuit based on the provided information by the relay. By clearing the fault fast with the help of fast acting protective relay and associated circuit breaker the damage to the apparatus is reduced and the resultant hazards like fire the risk of the life is reduced by removing the.

Relay is a protective device which senses the faulty conditions in a power system line and initiates the operation of circuit breaker to isolate the faulty part from the rest of the healthy power system examples of relays are over current relay directional relay etc. The relay is a switching device which gives a signal to the circuit breaker as soon as the fault occurs in the power system. The main difference between relay and circuit breaker is that a relay is typically used as a switch in circuits with small currents whereas a circuit breaker is used to sense and stop large currents from flowing in circuits. Circuit breakers are used one per circuit while relays can be used to control select one among many connected to it.

In such instances the answer is invariable local back up protection for circuit breaker failure and in many cases local back up protection for relay failure. In some instances the need for positive high speed clearing of all faults is so acute that two separate sets of primary relaying have been employed with one set arbitrarily designated as a back up. Circuit breaker breaks the circuit automatically when receives the signal from the relay. Main differences between circuit breaker and relay.

Unlike a fuse which operates once and then must be replaced a circuit breaker can be reset either manually or automatically to resume. The circuit breaker after taking the command from the protective relay disconnect the faulted element. A switch or sensing and monitoring device that is used to create or closed the contacts electro mechanically or electronically is known as a relay. The relay operates on a low power voltage input while circuit breakers are automatic on load devices.