IDG power rating in kVA?

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Prepare for the GoJet Airlines CRJ-550 Test. Use flashcards, multiple choice questions, and detailed explanations to ace your exam!

Multiple Choice

IDG power rating in kVA?

Explanation:
The question tests understanding of what a generator’s power rating means in an aircraft electrical system. The IDG’s rating is the maximum apparent power the generator can deliver, expressed in kVA, at the rated voltage and 400 Hz frequency. For the CRJ-550, each Integrated Drive Generator is sized at 40 kVA, which translates to about 32 kW of real power when the power factor is 0.8. This rating is chosen to meet the aircraft’s typical electrical load, including startup surges, without overloading the system. Values like 10 kVA would be too small for full electrical demand, while 60 kVA or 80 kVA would be larger than necessary for this airframe. Hence, 40 kVA is the correct rating.

The question tests understanding of what a generator’s power rating means in an aircraft electrical system. The IDG’s rating is the maximum apparent power the generator can deliver, expressed in kVA, at the rated voltage and 400 Hz frequency. For the CRJ-550, each Integrated Drive Generator is sized at 40 kVA, which translates to about 32 kW of real power when the power factor is 0.8. This rating is chosen to meet the aircraft’s typical electrical load, including startup surges, without overloading the system. Values like 10 kVA would be too small for full electrical demand, while 60 kVA or 80 kVA would be larger than necessary for this airframe. Hence, 40 kVA is the correct rating.

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