As chief engineer, to prevent the...

As chief engineer, to prevent the...

Question 1 of 270705eccefa4bacbc34ba4d4847e

As chief engineer, to prevent the motorization of an alternator what safety device would you have checked quarterly?

Question 1 of 27070

Q

As chief engineer, to prevent the motorization of an alternator what safety device would you have checked quarterly?

🔍 Key Concepts

• Alternator motorization and what causes a generator to start acting like a motor • Protection functions of a reverse power relay versus overcurrent relays • Which devices are intended to protect the alternator itself versus just signaling abnormal conditions (alarms)

💭 Think About

• Think about when an alternator is synchronized to a live bus: what happens if its prime mover (diesel/turbine) loses power but the breaker stays closed? • Which protective device is specifically designed to trip when power starts flowing into the alternator instead of out of it? • Which options are merely alarms (indications) and which are automatic protective trips that act fast enough to prevent damage?

✅ Before You Answer

• Identify which device detects direction of power flow, not just how large the current is • Separate alarms (which only warn you) from protective relays (which actually trip and prevent damage) • Confirm which relay is standardly used to prevent a generator from being driven as a motor by the switchboard bus