Question 180Electricity & Electronics - QMED

The correct answer is B) oncoming generator. When paralleling two AC generators, the synchroscope selector switch and frequency meter switch should be set up to sense the frequency of the oncoming generator. This allows the operator to match the frequency of the oncoming generator to the frequency of the bus or the generator already on the line, which is a critical step in the paralleling process. The other options are incorrect because the bus transfer relay is not involved in the paralleling process, and the bus or the generator already on the line do not need to be sensed, as the oncoming generator must match their frequency.