DA 62 AFM Airplane Description
7.10.1 GENERAL
The DA 62 has 28 Volt DC system, which can be sub-divided into:
- Power generation
- Storage
- Distribution
- Consumers
Power Generation
Power generation is provided by two 70 Ampère alternators (generators) which are
mounted on the bottom left side of each engine. The alternators are driven by a flat belt.
The power output line of the left hand alternator is connected to the LH MAIN BUS via
the LH alternator relay and a 60 Ampère circuit breaker. The power output line of the
RH alternator is connected to the RH MAIN BUS via the RH alternator relay and a 60
Ampère circuit breaker. Both main busses are connected to the BATTERY BUS via a
90 Ampère circuit breaker.
Both generator power output lines also run through a current sensor for each alternator,
which provides an indication of the power being supplied to the electrical system by an
alternator including the current for battery charging on the G1000. In the event of a main
battery failure, the field of each alternator is energized by two 12 V, 7.2 Ah sealed lead
acid batteries (ECU backup battery) connected in series, which are installed under the
passengers' seats. The ECU backup batteries provide also electrical power for the ECU
for a time of 30 minutes (condition).
The ENGINE MASTER LH (RH) switches connect the ECU backup battery to the alternator
field via a 10 Ampère fuse.
Doc. No. 11.01.05-E Rev. 0 11-Jan-2019 Page 7 - 63
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