Question 88Electricity & Electronics - Assistant Engineer

The correct answer is A) normally open 'UV' contacts. The 'UV' (undervoltage) relay is responsible for maintaining the circuit energized when the master switch handle is moved away from the 'off' position. The normally open 'UV' contacts close when the 'UV' relay is energized, completing the circuit and keeping the system powered up. The other options are incorrect because 'MS 2' and 'MS 1' contacts are not directly involved in maintaining the 'UV' relay, and the 'OL' (overload) contacts are normally closed, which would not be responsible for keeping the 'UV' relay energized.