CHAPTER 24
PAGE 3
MAINTENANCE MANUAL EXTRA 300/SC
PAGE DATE: 1. August 2014
24-00-00 GENERAL
This Chapter describes the electrical power system and its
operation. This covers the battery system and the alternator
system.
The battery system consists of Concorde RG-25 XC battery,
the master relay and the associated wiring. The battery is
located at the left bottom aft of the firewall; the master relay
some centimeters above. The charging socket is located on
the left fuselage side next to the firewall.
The alternator system consists of the alternator (B&C
Specialty, SD-8), the voltage regulator (B&C Specialty,
PMR1C), and the overvoltage module (B&C Specialty, PM/
OV). The voltage regulator is adjusted to 13.8 Volts. The
overvoltage module cuts the circuit at 14.7 volts. The alter-
nator is mounted at the aft of the engine. The voltage regulator
is located at the upper left of the firewall (cockpit side). The
overvoltage module is installed behind the instrument panel.
The related overvoltage protection circuit breaker ("OV
Protect") is installed next to the master switch.
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