Cessna 182 1973 - Over-Voltage Sensor and Warning Light; Circuit Breakers and Fuses

ternator
to
the
battery
or
from the
battery
to
the
aircraft
electrical
sys-
tem.
When
the
engine
is
operating
and the
master
switch
is
"ON,
'""
the
ammeter
indicates
the
charging
rate
applied
to the
battery.
In
the
event
the
alternator
is not
functioning
or
the
electrical
load
exceeds
the
output
of
the
alternator,
the
ammeter indicates
the
discharge
rate
of
the
battery.
OVER-VOLTAGE
SENSOR
AND
WARNING
LIGHT.
The
aircraft
is
equipped
with
an
automatic
over-voltage
protection
system
consisting
of
an
over-voltage
sensor
behind
the
instrument
panel
and
a
red
warning
light,
labeled
"HIGH
VOLTAGE",
below
the
engine
instrument
cluster.
In
the
event
an
over-voltage
condition
occurs,
the
over-voltage sen-
sor
automatically
removes
alternator
field
current
and
shuts
down
the
alternator.
The
red
warning light
will
then
turn
on,
indicating
to
the
pilot
that
the
alternator
is
not
operating
and the
aircraft
battery
is
supply~
ing
all
electrical
power.
The
over-voltage
sensor
may
be
reset
by
turning
the
master
switch
off
and back
on
again.
If
the
warning light
does not
illuminate,
normal
alternator
charging
has
resumed;
however,
if the
light
does
illuminate
again,
a
malfunction
has
occurred,
and
the
flight
should be
terminated
as
soon
as
practical.
The
over-voltage
warning light
may
be
tested
by
momentarily
turning
off
the
"ALT"
portion
of
the
master
switch and
leaving
the
"BAT"
portion
turned
on.
CIRCUIT
BREAKERS
AND
FUSES.
Most
of
the
electrical
circuits
in
the
airplane
are
protected
by
"push-
to-reset'
circuit
breakers
mounted
on
the
instrument
panel.
Exceptions
to
this
are
the
battery
contactor
closing
(external
power)
circuit,
and
the
optional
clock
and
flight
hour
recorder
circuits
which have
fuses
mounted
near
the
battery.
Also,
the
cigar
lighter
is
protected
by
a
manually-
reset
type
circuit
breaker
mounted
directly
on
the
back
of
the
lighter
be-
hind
the
instrument
panel.
When
more
than
one
radio
is
installed,
the
radio
transmitter
relay
(which
is
a
part
of
the
radio
installation)
is
protected
by
the
navigation
lights
circuit breaker
labeled
"NAV
LIGHTS."
It
is
important
to
remem~
ber that
any
malfunction
in the
navigation
lights
system
which
causes
the
circuit
breaker
to
open
will
de-activate
both
the
navigation
lights
and
the
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