External Power Switch; Circuit Breakers; Voltage And Amperage Display - Cessna Grand Caravan 208B G1000 Manual

SECTION 7
AIRPLANE AND SYSTEMS DESCRIPTION

EXTERNAL POWER SWITCH

The external power switch is a three-position guarded toggle-type
switch located on the left sidewall switch and circuit breaker panel. The
switch has OFF, STARTER, and BUS positions and is guarded in the
OFF position. When the switch is in the OFF position, battery power is
supplied to the main bus and to the starter-generator circuit, external
power cannot be applied to the main bus, and, with the generator
switch in the ON position, power is applied to the generator control
circuit. When the external power switch is in the STARTER position,
external power is applied to the starter circuit only and battery power is
supplied to the main bus. No generator power is available in this
position. When the external power switch is in the BUS position,
external power is applied to the main bus and no power is available to
the starter. The battery, if desired, can be connected to the main bus
and external power by the battery switch; however, battery charge
should be monitored to avoid overcharge.

CIRCUIT BREAKERS

Most of the electrical circuits in the airplane are protected by pull-off
type circuit breakers mounted on the left sidewall switch and circuit
breaker panel. Should an overload occur in any circuit, the controlling
circuit breaker will trip, opening the circuit. After allowing the circuit
breaker to cool for approximately three minutes, it may be reset
(pushed in). If the breaker trips again, it should not be reset until
corrective action is taken.
Make sure all circuit breakers are in before all
flights. Never operate with tripped circuit breakers
without
consequences.

VOLTAGE AND AMPERAGE DISPLAY

The status of the electrical system can be monitored on the MFD (non-
reversionary mode). Battery current (BAT AMPS) and bus voltage
(BUS VOLTS) are displayed on the default EIS-ENGINE display page.
By pressing the ENGINE softkey and the SYSTEM softkey, the EIS
pages changes to the EIS-Systems display where generator current
(GEN AMPS), and bus voltage (BUS VOLTS) can be monitored
simultaneously. A negative display on BAT AMPS indicates battery
discharge, while a positive display indicates battery charging.
U.S.
7-78
WARNING
a thorough
MODEL 208B G1000
knowledge of
208BPHBUS-00
CESSNA
the