What is the purpose of the magnetic contactor?

Magnetic contactors are the same as the electrical relays which are used in a number of electric motors. Magnetic contactors are used in the electric motors to balance the change in frequency of the motor or the state of the motor which can be termed as the switching of the motor from ON and OFF state.

What is the function of contactor relay?

A contactor is a large relay, usually used to switch current to an electric motor or another high-power load. Large electric motors can be protected from overcurrent damage through the use of overload heaters and overload contacts.

What is the reason for the use of contactor in control circuits?

Why are Contactors Used? Contactors are used for high power applications. They allow a lower voltage and current to switch a much higher power circuit, so they are generally larger and more heavy-duty than control relays, enabling them to switch higher power loads on and off for many thousands of cycles (Figure 1).

What is the difference between a contactor and a relay?

A contactor joins 2 poles together, without a common circuit between them, while a relay has a common contact that connects to a neutral position. Additionally, contactors are commonly rated for up to 1000V, while relays are usually rated to only 250V.

What are the functions of a contactor?

A contactor is an electrical device which is used for switching an electrical circuit on or off. It is considered to be a special type of relay.

What is a contactor and how does it work?

A contactor is an electromechanical switch whose function is to make or break the connection between the power supply and the load. The contactor is electrically controlled and usually powered at a much lower level than the switched circuit.

What is the meaning of contactor?

Definition of contactor : a device for repeatedly establishing and interrupting an electric power circuit under normal conditions.

What is the main difference between a relay and a contactor and between a contactor and a magnetic motor starter?

Comparison of Relay and Contactors

Relays	Contactor
Relays are switching devices used in any control circuit for checking a condition or multiplying the number of contacts available.	Contactors are switching devices used to control power flow to any load.
Relatively smaller in size	Larger when compared to Relays

What is the difference between a contactor and a magnetic starter?

A contactor applies voltage to a contactor coil to close the contacts and to supply and interrupt power to the circuit. On the other hand, a starter employs overload relays to protect the motor from load surges by shutting it down to prevent overheating.

What is the function of a magnetic contactor?

Magnetic contactors act as a safeguard to protect the power supply and the motor. Magnetic contactors are sometimes considered as circuit breakers due to their similarity of shape with the circuit breakers but their functionality is different than that of circuit breakers.

What is the function of a contactor or motor starter?

The function of a contactor or motor starter is simple, when the AC supply goes to the contactor coil, the coil makes a strong magnetic field and the field pulls the iron core to the coil and makes electrical contacts. The NC means the Normally close electric circuit or we can say it is normally close contact and NO means normally open contacts.

How does a magnetic ContaCOr work?

How a Magnetic contacor Works. The function of a contactor or motor starter is simple, when the AC supply goes to the contactor coil, the coil make a strong magnetic field and field pulls the iron core to the coil and make a electrical contacts.

How do contactors and relays work?

Contactors and relays are operated by applying a voltage to the coil of an Electro-magnet, which will cause a switch, (or several switches) to close. The circuit that applies the voltage to the coil is referred to as the control circuit, because it controls the main device that the contactor or relay is switching.