Learning how contactor working occurs gives insight into many automated and heavy-duty electrical systems. According to Campus Component, when voltage is applied to the coil of a contactor, it generates a magnetic field that pulls in an armature. This closes main contacts allowing current to flow to the load. Conversely, when the coil is de-energized, a spring returns the armature to ... https://www.campuscomponent.com/blogs/post/contactors-components-types-working-and-applications