As shown in the illustration, what is responsible for maintaining the "UV" relay energized when the master switch handle is moved away from the "off" position? Illustration EL-0102

Correct Answer: Option D — normally open 'UV' contacts

Undervoltage protection circuits utilize auxiliary holding contacts across control switches. Once the master switch moves from the off position, the normally open 'UV' relay auxiliary contacts close to establish a seal-in circuit, maintaining coil energization and preventing unintended restarting after voltage dips.