Question 189Electricity/Electronics - QMED70% to pass
To remove an alternator operating in parallel with another unit from the main electrical bus, what must be done FIRST?
AI Explanation
The correct answer is D) remove the load from the outgoing alternator.
To remove an alternator operating in parallel with another unit from the main electrical bus, the first step is to remove the load from the outgoing alternator. This is because with the load still connected, removing the alternator from the bus would result in a sudden loss of power, which could potentially damage the electrical system. By removing the load first, the transition can be made smoothly without disrupting the power supply. The other options, such as adjusting the power factor or setting the desired voltage, would not be the appropriate first step in this scenario.
Related Questions
#187 You are paralleling two alternators. The synchronizing lamps grow dim and are totally darkened as the synchroscope pointer approaches the 0° position. What does this indicate? #188 You are attempting to parallel two AC generators, and the synchroscope pointer is revolving in the fast direction. What is the frequency of the oncoming generator relative to the bus frequency? #190 A main switchboard synchronizing panel is fitted with two synchronizing lamps and a synchroscope. When paralleling, if the synchroscope pointer is at the noon position and one synchronizing light is bright while the other remains dark, what does this indicate? #191 If the excitation of an alternator operating in parallel is decreased below normal and the other above normal, what will be the result on the alternator with the excitation decreased below normal? #192 When paralleling two alternators using three synchronizing lamps, the flickering of all three lamps becomes progressively slower and slower. What does this mean?