G - Electrical systems
p. 47
OVRD
Xfer/stby busses from HOT MAIN
to HOT EMER BAT BUS
DC BUS OFF
Respective bus not supplied.
ELEC
on CAP
UNDV
DC STBY < 19.5 V. (No CAP)
Arrows
Emergency supply indicators
(respective battery discharging)
EMER BAT CHG
FAULT
: Overheat detected by
MFC or failure of contactor.
ELEC
on CAP
Contactor auto opens if: thermal
runaway/bus voltage <25 V. Start
sequence: Bat sw on OVRD
DC SVCE/UTLY BUS
In automatic shedding
One of the DC SVCE/UTLY 1 and
2 busses is shed 1 bus
SHED
(BCPU).
ELEC
on CAP.
In OFF
all DC SVCE/UTLY 1 and 2
busses are shed
DC SVCE supplies power in flight
and on ground during airplane
servicing operations.
UTLY BUSSES suplly non-
essential loads
DC GEN 1
Generator
FAULT
Lt.
Extinguishes above 61.5% NH if
GEN is operating normally
X START FAIL
Opposite generator has not come
on line to assist start at 10 % NH
BUS OFF
Associated bus deenergized.
ELEC
on CAP
INV FAULT
Under/over voltage at INV output.
(INV failure or supply loss). Auto-
Xfer of all AC busses to remaining
inverter.
ELEC
on CAP
OVRD
Insures basic mode operation by
overriding all other protections
ON
Basic mode: STBY busses
supplied by HOT MAIN BAT BUS.
Ext or gen power: DC STBY bus
transferred to HOT EMER BAT BUS
AC STBY BUS to DC BUS 1
AVAIL
GPU has been checked by BPCU
for over/under voltage, over
current and polarity
OFF
ESS BUS, DC STBY BUS + INV 1 are
isolated from HOT MAIN BAT BUS
DC EMER BUS is isolated from
HOT EMER BAT BUS
BTC
Allows BPCU to control BTC
operation. Ext power, hotel mode
or single gen operation, BTC is
closed
(green flow bar)
ISOL
BTC and BTR opened (released
out)
EXT PWR
AVAIL
+
ON
: GPU has prioity on
both generators
DC GEN 2
FAULT: protection trip by GCU;
Auto reset if underspeed: in other
cases manual. BTC auto closes
TRU
ON PB in. TRU is connected to
ACW BUS 2. Arrow illuminates
amber when DC EMER, DC STBY,
INV 1, AC STBY and DC ESS
BUS are supplied by TRU
3. DC-AC panel
ATA 24
Summary of Contents for 42-500
Page 1: ...72 212A 42 500 ...
Page 7: ...A Aircraft general p 6 A Aircraft general p 6 A Aircraft general FCOM 1 00 ...
Page 12: ...A Aircraft general p 11 8 Internal lighting ATA 33 ...
Page 14: ...B Multi Function Computer p 13 B Multi Function Computer FCOM 1 01 ...
Page 16: ...C Centralized crew alerting system p 15 C Centralized crew alerting system FCOM 1 02 ...
Page 22: ...D Air p 21 D Air FCOM 1 03 ...
Page 30: ...E Automatic flight control system p 29 E Automatic flight control system FCOM 1 04 ...
Page 33: ...F Communications FCOM 1 05 p 32 F Communications ...
Page 38: ...G Electrical systems p 37 G Electrical systems FCOM 1 06 ...
Page 52: ...H Emergency equipment p 51 H Emergency equipment FCOM 1 07 ...
Page 57: ...I Fire protection p 56 I Fire protection FCOM 1 08 I Fire protection p 56 ...
Page 60: ...J Flight control p 59 J Flight control FCOM 1 09 ...
Page 65: ...K Flight instruments p 64 K Flight instruments FCOM 1 10 K Flight instruments p 64 ...
Page 74: ...L Fuel system p 73 L Fuel system FCOM 1 11 ...
Page 83: ...M Hydraulic system p 82 M Hydraulic system FCOM 1 12 M Hydraulic system p 82 ...
Page 86: ...N Ice and rain protection p 85 N Ice and rain protection FCOM 1 13 ...
Page 92: ...O Landing gear p 91 O Landing gear FCOM 1 14 ...
Page 95: ...P Navigation system p 94 P Navigation system FCOM 1 15 P Navigation system p 94 ...
Page 98: ...P Navigation system p 97 MODE 4 unsafe terrain clearance MODE 5 below glideslope ...
Page 102: ...Q Power plant p 101 Q Power plant FCOM 1 16 ...
Page 110: ...Annexes p 109 Annexes ...
Page 128: ...p 127 ...