Operation of a contactor
A contactor is an electrical device that is used for switching an electrical circuit on or off. It works by using a low-powered control signal to energize an electromagnet which then closes or opens the contacts that allow current to flow through the circuit.
When the control signal is applied to the contactor, the electromagnet is energized and produces a magnetic field. This magnetic field attracts the movable armature towards the stationary contact, closing the circuit. This allows electrical current to flow through the circuit, powering the load connected to it.
When the control signal is removed, the electromagnet is de-energized, and the magnetic field dissipates. The movable armature then returns to its original position, opening the contacts and interrupting the flow of current through the circuit.
In summary, a contactor uses an electromagnet to open or close a set of contacts to control the flow of electrical current through a circuit.