I agree with the other candidates. The online topologies, C and D, are the way to go for a 50 kW UPS. Can't imagine trying to use a Standby system for that kind of power requirement.
Hmm, I'm not sure about the Standby and Standby - ferro options. Aren't those usually used for smaller systems? I'd go with the online topologies for this one.
I think the correct answers are C) Delta conversion online and D) Double conversion online. These topologies are commonly used for high-power UPS systems.
Gayla
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