Electrically Held Contactors Operated by an electrical coil that energizes a solenoid. When the coil is energized, the solenoid pulls a movable contact into contact with a stationary contact, closing the circuit. When the coil is de-energized, a spring or other mechanical force opens the contact.

Mechanically Held Contactors Operated by a mechanical force, such as a lever or cam. Once the mechanical force is applied, the contacts remain closed until the force is removed. Do not require electrical wiring to hold the contacts closed.Why a Mechanically Held Contactor Needs Wires to Control It

Mechanically held contactors require wires to control them for two reasons:1. To initiate the mechanical force

Wires are connected to an actuator, such as a solenoid or motor, which applies the mechanical force to close the contacts.2.

To release the mechanical force: Wires are connected to a release mechanism, such as a spring or other component, which opens the contacts when the force is removed.In other words, the wires are used to control the timing and sequence of events that open and close the contacts mechanically. Flag for review