SOCATA
MODEL TB 20
SECTION 7
DESCRIPTION
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© 1988, 1991, 1992, 1994 to 1996, 1997, 2000 -
socata
- All rights reserved
June 30, 1988
Revision 8
7.44
CIRCUIT BREAKERS AND FUSES
Most of electrical circuits are protected by circuit breakers installed on the
L.H. side panel, adjacent to the pilot. Should an overload occur on a circuit,
the circuit breaker opens and will switch off the circuit. Allow it to cool for three
minutes approximately, then the circuit breaker may be closed again
(pressed down).
Avionics equipment are protected by circuit breakers grouped in the lower
part of the L.H. side circuit breakers panel.
In addition to protection of the alternator supply with a 60–amp pull–off type
circuit breaker labeled ”ALT
r
”, the following pull–off type circuit breakers have
been installed :
– 70 A labeled ”BAT” between battery and network
– 30 A labeled ”BUS 1” on bus bar 1 supply
– 30 A labeled ”BUS 2” on bus bar 2 supply
– 30 A labeled ”BUS 3” on bus bar 3 supply
These five pull–off type circuit breakers are manually–operated and can
isolate the various sources or bus bars.
Fuses located on L.H. firewall door protect following circuits (from left to
right) :
Upper row :
advisory panel, landing gears warning lights, advisory
panel, compass lighting, rear cabin light, starter relay,
electric tachometer, emergency lighting,
and if installed :
propeller de–icing, RMI, converter 26 V / 400 Hz,
radio fan, spare.
Lower row :
engine monitoring cluster, engine monitoring cluster,
landing gears control, flaps indicator, flaps control,
alarms box (landing gear + stall), visor lighting,
and if installed :
chronometer, intercom, clock, alti–coder, maps light,
spare, hourmeter, fuel flowmeter.
