How do contactors work?

Operating Principle of a Contactor:The current passing through the contactor excites the electromagnet. The excited electromagnet produces a magnetic field, causing the contactor core to move the armature. When current is removed, the coil is de-energized and opens the circuit.

What happens when a contactor is energized?

Operating Principle of a Contactor: The energized electromagnet then creates a magnetic field. This causes the core of the contactor to move the armature. Since contactors are designed to rapidly open and close contacts, moving contacts may bounce as they rapidly collide with fixed contacts.

How does DC contactor work?

DC contactors are electrical switching devices, similar to a relay. The contactor functions by applying a voltage to the coil, this creates a magnetic field which moves the contacts to the closed position and completes the circuit.

How much voltage does a contactor need?

Contactors use 120 volt standard power to energize a magnetic coil, which causes a set of internal contacts to close and provide higher power to the equipment.

What is difference between contactor and relay?

Control Relay: It is a device through which contacts in one circuit are operated by an alteration in conditions in the same circuit or in associated circuits. Contactor: It is a device which is used for repeatedly establishing and interrupting an electric circuit under normal conditions.

What does A1 and A2 mean on a contactor?

One side of the contactor coil (A2) is connected directly to one of the incoming power lines. The other side of the coil (A1) has two possible pathways to complete a connection to the other incoming power line.

How does a contactor loop work?

Once the two sets of contacts meet, power can flow through the contactor contacts to the load. At the point when the contactor loop is de-energized, the magnetic field is broken and the spring powers the two arrangements of contacts separated. Open and close the Circuit. Contactors are will utilized when no overload protection is fundamental.

What is the function of a contactor on a circuit?

Contactors are used by electrical equipment that is frequently turned off and on (opening and closing the circuit), such as lights, heaters, and motors. Whatever the application, the function of the contactor is always the same: to make and break all power supply lines running to a load.

What happens when a contactor is energized and de-energized?

On de-energizing, the contactor coil gravity or spring moves back the electro-magnetic coil to its initial position and there is no flow of current in the circuit. If contactors are energized with AC current, a small portion of the coil is the shaded coil, where the magnetic flux in the core is slightly delayed.

Can a coil contactor provide short circuit or overload protection?

They cannot provide short circuit or overload protection but can break the contact when coil excites. The contactor consists of two iron cores, where one is fixed and the other one is the movable coil and it is an insulated copper coil. Where the copper coil is located on the fixed core.