Airplane Description
6â
Diamond
~
~
AIRCRAFT
DA42AFM
7.10.1 GENERAL
The
DA
42 has 28 Volt DC system, which can be sub-divided into:
-
Power generation
- Storage
- Distribution
- Consumers
Power Generation
Power generation is provided by two 60 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
li
ne
of
the left
ha nd
alternator is connected to the
LH
MAIN BUS via
the
LH
alternator
re
lay and a 70 Ampère circuit breaker. The power output line
of
the
RH
alternator is connected to the
RH
MAIN BUS via the
RH
alternator
re
lay and a 70 Ampère
circuit breaker. Both main busses are connected to the BA
TIER
Y BUS via a 90 Ampère
circuit breaker.
Both generator power output
lines a Iso 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
G1
000. ln the event
of
a main
battery
failure the field
of
each alternator is energized by two 12 V, 1.3
Ah
sealed lead
acid batteries (excitation battery) connected in series, which are installed
in
the nose
baggage compartment. The
ENGINE MASTER
LH
(RH) switches connec! the excitation
battery to the
alternator field via a 5 Ampère fuse.
If
MAM 42-240
or
OAM 42-074
or
OAM 42-129 are carried out:
The ENGINE MAS TER
LH
(RH) switches connec! the excitation battery to the alternator
field
via a 10 Ampère fuse.
Page
7-54
Rev. 8
15-Dec-2017 Doc. No. 7.01 .05-E
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