Question 59Electricity/Electronics - 1st Asst/Chief70% to pass
As shown in the illustration of a DC diesel-electric propulsion drive system, what would be the set up contactor configurations if #1 M/E is to be secured, so that only #2 M/E diesel-generator is set up to supply both propulsion motors? Illustration EL-0141
AI Explanation
The correct answer is A) contactors G2 and S1 pulled in; contactors G1 and S2 dropped out.
To secure #1 M/E and set up #2 M/E diesel-generator to supply both propulsion motors, the contactors need to be configured such that the power from #2 M/E is routed to both propulsion motors. This is achieved by pulling in contactors G2 and S1, which connect #2 M/E to the propulsion motors, while dropping out contactors G1 and S2, which would have connected #1 M/E to the propulsion motors.
The other options are incorrect because they do not correctly route the power from the active #2 M/E diesel-generator to both propulsion motors.
Related Questions
#57 What type of electric propulsion system converter is shown in the illustration? Illustration EL-0155 #58 The conversion of constant frequency power into adjustable frequency power in a modern AC propulsion drive system is commonly achieved through the use of what electronic system components? #60 Refer to the two-generator, two-motor, DC diesel-electric drive propulsion system simplified schematic shown in the illustration. Which of the following conditions would cause the propulsion shaft to only rotate in the ahead direction? Illustration EL-0141 #61 While standing an "at sea watch" onboard a modern rectified DC diesel-electric drive ship you notice the transformer core temperature slowly rising. What should be your FIRST action? #62 Refer to the two-generator, two-motor, DC diesel-electric drive propulsion system simplified schematic shown in the illustration. While in two-generator, two-motor operation, which of the following conditions would cause the propulsion shaft speed to be approximately one-half the desired speed? Illustration EL-0141