Pipistrel 890 AT 912 LSA, Pilot'S Operating Handbook And Flight Training Supplement

Page: 67 / 96

ALPHA Trainer
www.pipistrel-aircraft.com
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POH-162-00-40-050
Electrical system
Description: dual electronic ignition. Standard, 12/14 V circuit charges the battery
and provides power to all appliances and instruments.
Master switch: toggle switch type
Avionics switch: toggle switch type, powers all electrical avionics.
Magneto switches: separate Left (MAG L), Right (MAG R)
Other switches:
fused and equipped with control lights (switch illumination)
Battery: 12 V, 10 Ah
Measured power
consumption of some
electrical loads:
NAV/AC lights: 1 (steady) - 2 (peak) A , Cockpit light: 0.5 A,
Radio & Transponder, EFIS,
Please consult item’s operating manual
The electrical system uses simplified architecture. Characteristic are separate magneto toggle switch-
es and a switch-type master switch. Avionics switch is separate.
There are individual fused rocker switches used to control individual electrical loads (lights, etc.), apart
from electrical avionics.
The generator is integral to the engine and provides up to 250 Watts at 5800 RPM. It is connected to
the rectifier with an output of 14 V (DC).
The electrical system itself includes three solenoids, one activated by the master switch, the second
activated by the avionics switch and the starter engage. All electrical loads, apart from the 12 V socket
and the Pitot heat, are connected to the avionics bus via push-pull circuit breakers. For loads, which
are engaged and disengaged more often, fused rocker switches are used (Electrical fuel pump, 12
V socket, NAV/AC lights, LDG light, etc.) All other loads (e.g. avionics) receive power as soon as the
Avionics switch is ON. The avionics switch has no function when the master switch is OFF. The starter
engage button is also disabled when the master switch is OFF.
Aircraft & systems
7-9
Battery disconnection system
On the ALPHA Trainer, Battery Disconnect Switch the battery can be disconnected from the circuit.
The battery disconnection lever is a red flag-type lever is found on the main electric board (cabin-side
of the firewall) above the main battery on the right-hand side of the cabin. It is attached to a wire
which leads to the battery disconnection ring on the instrument panel’s switch column. To discon-
nect the battery from the circuit, pull the battery disconnection ring on the instrument panel’s switch
column. To reconnect the battery back to the circuit, use the flag-type lever on the firewall. Deflect
the lever so that its flag end points towards the firewall. Having done this correctly, you will feel the
flag-lever jam into position.
Battery reconnection can be done in-flight as well (e.g. following a successfully rectified emergency
situation) but only from the left-hand seat, since you cannot reach the flag-lever from the right-hand
side of the cockpit.