Raytheon Beech Baron E55 - Page 617

Ral~heon
Aircraft
Company
BARON
55
AND
58
SHOP MANUAL
2.
With
both
engines
running
at
minimum cruise
rpm
and both alternators
on,
turn
on
all
possible
electrical
loads.
Check to
see
if the
alternators share
the load
to
within
10
percent
of
the
rated
output
of
one
of
the
alternators.
If
they
do
not
share
the
electrical load
as
described,
refer
to
ALTERNATOR
PARALLELINGprocedure.
I
m.
Shut down
the
left and
right engines according
to
the ENGINE SHUT DOWN
procedures
in
the
applicable
Pilot’s
Operating
Handbook.
n.
Remove the
precision
voltmeter
from
the
airplane.
AL
TERNA
TOR
PARALLELING
On
the
airplanes,
which
use
one
regulator
to
regulate
the
output
of both of
the
alternators,
there
are no
provisions
for
paralleling
the
alternators.
Unbalanced
outputs
between the alternators
can
be
caused
by:
(1)
voltage
drops
in
the
charging
system
wiring;
(2) voltage drops
in
the
ground
circuit
connections;
(3) manufacturing
tolerances
in
the
alternators;
(4)
variations
in the overall resistance characteristics between the
two
charging
circuits;
(5) operating
temperature
of
the
alternators
and the
voltage regulator,
and
(6)
the
engine
rpm.
If either alternator
is turned
off
and
the
remaining
alternator
picks
up
the
load,
the alternators
are
functioning
I
properly.
Alternator
charging
systems,
unlike the
generator
systems,
do
not
require
a
balanced
output
to
prevent component
damage.
E21
SECTION
13
DePcag3~Page
19