Electricalsystem - Piper CHEROKEE TURBO ARROW III 1976 Pilot Operating Handbook

PIPER AIRCRAFT CORPORATION
SECTION 7
PA-28R-201T,
CHEROKEE
TURBO ARROW III
DESCRIPTION AND OPERATION
7.15 ELECTRICAL SYSTEM
All switches are grouped in a switch panel above
the
power quadrant. On the
lower right side of the
instrument
panel is
the
circuit breaker panel, with
each breaker clearly marked
to
show
what circuit it
protects.
Also,
circuit
provisions are made
to
handle
the
addition
of communications
and navigational
equipment.
Standard electrical accessories
include alternator, starter, electric fuel
pump, stall warning indicator,
ammeter, and annunciator panel.
The annunciator panel includes alternator and low oil pressure indicator
lights. When
the
optional gyro
system is
installed,
the
annunciator panel also includes a low
vacuum
indicator light. The
annunciator panel
lights are provided only as a warning to the
pilot
that
a
system may not be
operating properly, and that he
should check and monitor the
applicable
system gauge to
determine
when or
if
any necessary
action is
required.
Optional electrical
accessories
include
navigation, anti-collision, landing, instrument and cabin dome
lights. Navigation and radio lights are controlled by a rheostat
switch on
the left
side
of the switch
panel.
The
instrument
panel
lights
are controlled
by
a rheostat switch on
the
right side of
the
panel.
WARNING
When optional
panel lights are
installed,
rheostat
switch must be
off
to
obtain
gear
lights full intensity during daytime flying. When
aircraft is operated at night and panel light rheostat
switch is
turned
on, gear
lights and over boost light will automatically dim.
The anti-collision
and
landing lights
are controlled
by
rocker switches
on
the
switch panel.
NOTE
Anti-collision
lights should
not
be operating when flying
through
overcast
and clouds since reflected light can produce spacial
disorientation. Do not operate strobe lights
in
close proximity
to
ground,
during takeoff
and
landing.
The master switch, also located in
the
switch panel, is a split rocker switch. One side of
the
switch
is
the
battery side ("BAT") and
the
other is
the
alternator side ("ALT"). Henceforth,
"master
switch," used
in
this manual,
shall mean
both "BAT"
and "ALT" switches.
The "ALT"
switch is provided
for an
emergency
and its function is covered under "Alternator Failure" in
the
Emergency section of
the
handbook,
The primary electrical power
source
is a 14-volt,
65-amp alternator,
which
is protected by a voltage
regulator and an overvoltage relay.
The
alternator provides full electrical power output even at
low engine
RPM.
This
provides
improved radio and electrical equipment operation and increases
battery life by
reducing
battery load.
Secondary power is provided
by
a 12-volt, 25-ampere
hour battery.
ISSUED: DECEMBER 20, 1976
REPORT: VB-800
7-15