What is the important of contactor on the control circuit?
Introduction. A contactor is an electrical device which is used for switching an electrical circuit on or off. These contacts are in most cases normally open and provide operating power to the load when the contactor coil is energized. Contactors are most commonly used for controlling electric motors.
Are contactors used in control circuits?
Contactor: It is a device which is used for repeatedly establishing and interrupting an electric circuit under normal conditions. Control Relay is more commonly used in control circuits which are single phase circuits. Contactors are typically built for switching 3-phase load.
What is the function of a contactor in an electrical circuit?
Therefore, the function of the contactor is to switch an electrical circuit on or off. Overloading of the circuit can be prevented by adding an thermal overload relay. To deactivate, the contactor can be pulled out of the parent device in which it’s embedded and operating.
What is the main difference between a relay and a contactor?
What is the difference between contactor and relay? Load capacity. Relays are used for low power output applications up to 10A, Whereas Contactors are used for large power output greater than 10A. Application. Relays are used mostly for single-phase Applications Contactors are used for three-phase Applications such as motor starters. Voltage. Size and Cost. Switching Speed. Power Consumption.
What are the three major parts of a contactor or relay?
There are three major parts of a contactor or relay: the coil, mechanical linkage and contacts. The coil is used to create a magnetic field and is rated based on voltage (24 V, 120 V, 208/204 V, 480 V). The mechanical linkage connects the armature to the contacts when the coil is energized, completing the circuit.
What is the advantage of using contactor?
One-third less footprint and clearance requirements