BOMBARDIER Challenger 601-3A CL-600-2B16 Pilot Training Manual page 68

IDG IDG
1 1
GCU GCU
GLC
1
A23
MAIN AC BUS 1 ESS AC BUS
Figure 2-9. Emergency AC Power Feed (All GENs INOP)
EMERGENCY AC SYSTEM
The emergency AC power system provides
115-/200-volt, 3-phase, 400-Hz AC power au-
tomatically in flight in the event of loss of all
primary and auxiliary AC power. The air-
driven generator (ADG) is stowed in a com-
partment on the right side of the nose (Figure
2-10) and can be deployed either automatically
or manually. Once deployed, the ADG cannot
be retracted until the airplane is on the ground.
When deployed, the ADG provides power di-
rectly to the ADG bus. ADG power is rated at
15 kva and is controlled through a GCU also
rated at 15 kva.
The ADG consists of a ram-air turbine (RAT)
and an AC electrical generator mounted on a
trunnion-pivoted support leg. The ram-air tur-
bine is a two-bladed 19-inch propeller (Figure
2-11) with a variable-pitch mechanism that is
used to achieve the constant speed necessary to
operate the generator at a constant frequency.
2-8 CL 601-3A/R
APU APU
GEN GEN
AP/EP
GCU GCU MONITOR MONITOR
CONT
GTC
1
B23
ESS
PWR
TC
ADG BUS
C5
EMERG
AC TC
3B
FOR TRAINING PURPOSES ONLY
FlightSafety Canada
CL-600-2B16 PILOT TRAINING MANUAL
EXT EXT IDG IDG
ADG ADG
AC AC
GCU GCU GCU GCU
GTC
2
GLC
2
MAIN AC BUS 2
Figure 2-10. Air-Driven Generator Location
The AC generator is similar in construction
and operation to the other three generators but
is rated at 15 kva. It is air cooled and therefore
subject to lower temperature restrictions.
2 2
LEGEND
UNPOWERED
POWERED BUS
ADG POWER
L t ée
L t d.