Once the motor starter contactor control coil is energized, and being held energized by the holding contacts, pressing the normally closed Stop pushbutton will de-energize the control coil; causing the contactor holding contacts to open.

Contactor

An electrically controlled switch used for switching an electrical power circuit, commonly used in motor and lighting applications.

Energized

A term used to describe when an electrical component or circuit has voltage applied and is functioning or ready to function.

Holding Contacts

Electrical contacts designed to maintain power in a circuit after an initial actuation, typically found in relays and starters to keep circuits closed.