![Beechcraft Beech 95 2017 Pilot'S Information Manual Download Page 77](http://html.mh-extra.com/html/beechcraft/beech-95-2017/beech-95-2017_pilots-information-manual_2720130077.webp)
Selkirk College IATPL Program Manual
Beech 95 POH
Effective September 1, 2005
Appendix 14 - 77
Each aircraft has two voltage regulators. The units on FXFG are combination voltage
regulators with built in over voltage sensors (explained below) while GSAK has a
separate over voltage relay that follows the regulators in the circuit (see electric diagram
below.) Only one voltage regulator is used at a time. If only one alternator switch is
turned on all the regulators output is sent to that alternator’s field. If both alternator
switches are on then the current is divided between the two al
ternator’s fields.
Because only one voltage regulator sustains the field of both alternators it is quite normal
for one alternator to produce more current than the other, i.e. for one ammeter to read
slightly higher than the other. As long as the lower alternator picks up the load when the
higher alternator is turned off operation is normal.
Certain emergency checklists call for the alternator circuit breakers to be pulled. Pilots
are cautioned that pulling the field circuit breaker will deactivate both alternators.
Busses
The Travelair has a main bus and an avionics bus. The main bus is behind the pilot’s sub
-
panel and supports all system circuit breakers and fused switches. The avionics bus is
behind the avionics circuit breaker panel and supports all avionics circuit breakers.
The two alternators send current directly to the main bus through the two 50 amp circuit
breakers labeled left alternator and right alternator.
The avionics bus is fed through a switch that takes power directly from the main bus.
Two switches are provided to ensure redundancy (explained under Avionics Circuit
Breaker Panel).
Batteries
To increase battery capacity two 12-volt batteries are connected in series to act as a single
24-volt battery. These batteries are mounted in a battery box below the nose baggage
compartment. The battery box has a drain tube to carry away any fumes or liquids that
might accumulate in the battery box.
The combined battery unit has a capacity of 25-amp-hours. An electrical load analysis is
available in the approved aircraft POH that permits pilots to estimate how long the
battery can sustain the electric system in the event of inoperative alternators.
Circuit breakers and Fused Switches
Two types of circuit breakers can be found in the Travelair. One type, pictured below is
“pullable,” which means that the pilot can grasp the CB and pull it out, deactivating the
specified circuit. The other type of CB, also shown below is re-settable only. This type of
breaker will pop out when current in the circuit exceeds the specified amount but cannot
be pulled out by the pilot. Most avionics use this type of CB.
Summary of Contents for Beech 95 2017
Page 2: ...Selkirk College IATPL Program Manual Beech 95 POH Effective September 1 2005 Appendix 14 2 ...
Page 3: ...Selkirk College IATPL Program Manual Beech 95 POH Effective September 1 2005 Appendix 14 3 ...
Page 43: ...Selkirk College IATPL Program Manual Beech 95 POH Effective September 1 2005 Appendix 14 43 ...
Page 51: ...Selkirk College IATPL Program Manual Beech 95 POH Effective September 1 2005 Appendix 14 51 ...
Page 80: ...Selkirk College IATPL Program Manual Beech 95 POH Effective September 1 2005 Appendix 14 80 ...
Page 81: ...Selkirk College IATPL Program Manual Beech 95 POH Effective September 1 2005 Appendix 14 81 ...