A ships main propulsion electric drive power...

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Question 1 of 205eccefa4bacbc34ba4d483a0

A ships main propulsion electric drive power converter panel circuit breaker may fail to close due to the action of various electrical interlocks via shunt trips. What permissive circuit/electrical interlock would most likely be the cause?

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🔍 Key Concepts

• electrical interlocks and permissives on propulsion power converters • protection of high‑power semiconductors (overheating, cooling requirements) • difference between safety/mechanical conditions and converter-protection conditions

💭 Think About

• Which condition, if NOT satisfied, would most reasonably trigger an automatic shunt trip to prevent damage to the power converter itself? • Look at each option and ask: is this primarily about mechanical control/safety or about protecting the electronic power converter components? • For a large electric drive, what has to be “proven healthy” before you’re allowed to energize the main converter breaker?

✅ Before You Answer

• Identify which choice directly affects thermal protection and safe operation of the converter electronics. • Ask which interlock is most likely wired as a required permissive before the breaker can close (instead of just being an operator preference or separate safety). • Eliminate options that relate mainly to shaft control position or mechanical braking rather than the internal health of the power converter.

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