Alternator - Beechcraft C23 SUNDOWNER 180 Pilot Operating Handbook

BEECHCRAFT Sundowner 180 Section VII
C23 (M-1285
and
After) Systems Description
28-VOLT SYSTEM
One
24-volt
battery, or two
12-volt
batteries
in
series,
are
located
in the aft fuselage. The two
12-volt
batteries
in
series
are of a
shape and
size such
that
both will fit
in
the
same
battery compartment
which is
provided
for
the
24-volt
battery. Battery servicing procedures
are
described
in
the
HANDLING, S ERVICING
AND MAINTENANCE Section.
ALTERNATOR
14-VOLT SYSTEM
The alternator maintains
its full-rated
60-ampere output at
cruise engine rpm,
and
uses a
voltage
regulator
to
adjust
alternator output.
Since
the alternator
is
not
self-exciting,
dual
switches
are
required
to
activate
the
circuit. The
switch
placarded
BATTERY
&
ALT, when placed
in
the
ON position, will
only
activate
the
battery circuit. When
this switch
is
on and the
ALT (FIELD)
switch
is placed in
the
ON position,
the
alternator is excited by power
from
the
airplane battery.
When
the
BATTERY & ALT switch is in
the
OFF position,
the
alternator will be off
regardless
of the
ALT (FIELD)
switch position.
The alternator-field
circuit breaker
and alternator-output
circuit breaker
are
located
on the
right subpanel
{serials
M-
1285
through
M-2130).
On airplanes
M-2131
through
M-
2178
(and
M-1491
through
M-2130
with installation
of
Beech
Kit No.
23-3009-1
S) the
alternator
circuit
is
protected by an alternator-field circuit breaker
on the
right
subpanel,
and
an alternator-output current
limiter
on
the
firewall.
January,
1982
7-25