In the illustration shown, what would be the functional name for the coil represented as '1S'? Illustration EL-0012

Correct Answer: Option A — neutral contactor coil (for autotransformer wye connection)

In marine autotransformer motor starters, designated coil '1S' closes the wye-connection to establish the initial reduced-voltage starting step before transitioning to the running configuration per IEEE 45 standards.