Page Date: 20. April 2002 7 - 11
Section 7
Description and Operation of Aircraft and Systems
PilotĀ“s Operating Handbook
EXTRA 300S
7.12 ELECTRICAL SYSTEM
The electrical power generation system consists of a 12 V alternator with rectifier and
transistor voltage regulator. The alternator is mounted on and driven by the engine.
The field current is controlled by the voltage regulator to give a nominal output of 13,8 V
under all load conditions.
Circuit protection against over-voltage is provided by the voltage regulator.
The maximum load taken from the alternator is 40 amp.
The system is equipped with a low voltage monitor that gives a visual warning if the aircraft
voltage drops below 12,75 V.
The master-switch is located on the instrument panel.
A 12 V leak proof battery is connected across the alternator output to stabilize the supply
and to maintain all essential services in the event of an alternator failure and when the
engine is not operating. The battery is mounted behind the firewall.
All electrical circuits are protected by circuit breakers located on the instrument panel and
they are easily accessible to the pilot during flight.
The electrical system is adequately suppressed to ensure satisfactory operation of the radio
equipment.
All wires, switches, circuit breakers etc. are manufactured to related aeronautical
specifications.
Page Date: 31. January 2006
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