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? EL-0141

Correct Answer: Option A — contactors G2 and S1 pulled in; contactors G1 and S2 dropped out

To isolate #1 M/E, its generator contactor (G1) must be opened. To supply both propulsion motors from #2 M/E, the #2 generator contactor (G2) and the bus tie or secondary motor contactor (S1) must be closed. This configuration ensures the remaining generator carries the full propulsion load safely.