SmartCockpit Dash8 User manual

12.5 (ATA 24) ELECTRICAL POWER
12.5.1 Introduction
The Electrical Power Generation and Distribution System (EPGDS) is used to supply the electri-
cal energy for all onboard electrical equipment. The EPGDS has DC and AC generating sys-
tems. The DC generation system includes a battery system. The EPGDS provides for energy
conversion, distribution, storage, control, protection, monitoring, and indication to the flight crew.
Provision is made for external connection of DC or AC external power while on the ground.
12.5.2 General
The DC generation system is supplied by three NiCad batteries, two engine driven starter/gener-
ators, two Transformer Rectifier Units (TRUs) and an optional Auxiliary Power Unit (APU). The
TRUs supply 28VDC and are powered by two engine driven Alternating Current (AC) generators
that supply 115Volts Alternating Current (VAC).
The power is distributed by an electrical bus system. It re configures for individual power source
and bus failures, by the automatic closing and opening of bus tie contactors.
There are both DC and AC external power receptacles for Ground Power Unit (GPU) connection.
All AC and DC aeroplane services can be operated from the AC generators or the AC external
power alone.
Dash8 - Q400 - Electrical
Page 1

12.5.3 Controls and Indications - Electrical Power
Dash8 - Q400 - Electrical
Page 2

Figure 12.5-1 Engine and System Integrated Displays Control Panel (ESCP)
ESCP CALLOUTS PERTAINING TO ELECTRICAL ITEMS
1. ELEC SYS PUSHBUTTON (momentary action)
PUSH - provides a display of the electrical system page on the MFD (upper area) with MFD 1
or MFD 2 set at SYS
- there is no action with another push
ENG
SYS
NAV
PFD
MFD1
ENG
NAV SYS PFD
MFD2
ELEC
SYS
ENG
SYS
FUEL
SYS
DOORS
SYS ALL TEST
NORM
12
EFIS
ATT/HDG
SOURCE
ADC
OFF
ED BRT
NORM
12
SOURCE
EFIS
1
Dash8 - Q400 - Electrical
Page 3

Figure 12.5-2 DC Control Panel (1 of 3)
DC CONTROL
OFF
STBY
BATT
AUX
BATT
MAIN
BATT
BATTERY
MASTER
GEN 1 GEN 2 MAIN BUS
TIE
BUS FAULT
RESET
EXT PWR
OFF OFF OFF
OFF OFF OFF OFF OFF
12 3
Dash8 - Q400 - Electrical
Page 4

DC CONTROL PANEL CALLOUTS
1. STBY BATT switch (two position)
STBY BATT - left main feeder bus charging circuit connected to standby battery
- EPCU logic inhibits this connection under the following conditions:
• with external power (no charge) option
• when a DC bus fault is present on the left main feeder bus
• during emergency operations
OFF - disconnects standby battery from left main feeder bus
- STBY BATTERY caution light turns on any time the standby battery is not connected to
the left main feeder bus
2. AUX BATT SWITCH (two position)
AUX BATT - left main feeder bus charging circuit connected to auxiliary battery
- EPCU logic inhibits this connection under the following conditions:
• with external power (no charge) option
• when a DC bus fault is present on the left main feeder bus
• during emergency operations
OFF - disconnects auxiliary battery from left main feeder bus
- AUX BATTERY caution light turns on any time the auxiliary battery is not connected to
the left main feeder bus
3. MAIN BATT SWITCH (two position)
MAIN BATT - right main feeder bus charging circuit connected to main battery
- EPCU logic inhibits this connection under the following conditions:
• with external power (no charge) option
• when a DC bus fault is present on the right main feeder bus
• during emergency operations
OFF - disconnects main battery from right main feeder bus
- MAIN BATTERY caution light turns on any time the main battery is not connected to the
right main feeder bus
Dash8 - Q400 - Electrical
Page 5

Figure 12.5-3 DC Control Panel (2 of 3)
DC CONTROL
OFF
STBY
BATT
AUX
BATT
MAIN
BATT
BATTERY
MASTER
GEN 1 GEN 2 MAIN BUS
TIE
BUS FAULT
RESET
EXT PWR
OFF OFF OFF
OFF OFF OFF OFF OFF
567
4
Dash8 - Q400 - Electrical
Page 6

DC CONTROL PANEL CALLOUTS (cont’d)
4. BATTERY MASTER SWITCH (two position, lever locked at OFF)
BATTERY MASTER
- any battery is capable of powering both essential buses
- switch control is hard wired and independent of EPCU operation
OFF - disconnects the main, auxiliary, and standby batteries from the associated essential
buses
NOTE: The battery master switch must be selected to BATTERY MASTER before the main,
auxiliary, and standby batteries can power the respective buses.
5. GEN 1 and 2 SWITCHES (two position)
GEN 1 OR 2 - DC GCU permits generator to supply power to the associated feeder bus
- DC generators are inhibited with DC EXT PWR ON
OFF - shuts associated generator off
- resets GCU for subsequent generator and circuit monitoring following shutdown of a
generator
- DC GEN 1 or 2 caution light turns on anytime the respective generator is not supplying
power to its associated feeder bus
6. MAIN BUS TIE SWITCH (two position, lever locked at OFF)
MAIN BUS TIE - manually ties left and right main feeder buses.
- EPCU inhibits bus tie operation upon detection of a bus fault
OFF - manually opens connection between left and right main feeder buses
7. BUS FAULT RESET SWITCH (momentary selection)
BUS FAULT RESET - re initializes the EPCU after a bus isolation (following a bus fault) to
enable subsequent bus fault monitoring
Dash8 - Q400 - Electrical
Page 7

Figure 12.5-4 DC Control Panel (3 of 3)
DC CONTROL
OFF
STBY
BATT
AUX
BATT
MAIN
BATT
BATTERY
MASTER
GEN 1 GEN 2 MAIN BUS
TIE
BUS FAULT
RESET
EXT PWR
OFF OFF OFF
OFF OFF OFF OFF OFF
8
Dash8 - Q400 - Electrical
Page 8

DC CONTROL PANEL CALLOUTS (cont’d)
8. DC EXT PWR SWITCH
EXT PWR - left and right main feeder buses, essential buses and secondary buses powered
from DC external power source
- DC and APU generators are inhibited from connection to feeder buses
- DC EXT PWR ON vindication (green) is displayed on the MFD Electrical page when DC
external power is connected to the aeroplane
- the EPCU incorporates External DC Power Protection from too high or too low supply of
External DC power voltage
- external DC power is supplied to the aeroplane via the external DC power receptacle.
The EPCU will enable the connection of the external DC power to the aeroplane if the
applied external voltage is:
• of correct polarity, and
• its value is within 22 ± 1VDC to 31 + 0.5; 31- 0.75 VDC
- main, auxiliary, and standby batteries are connected to their feeder buses
- for the duration of engine start, the standby battery is inhibited from the left main feeder
bus
Dash8 - Q400 - Electrical
Page 9

Figure 12.5-5 AC Control Panel
EXT
PWR
GEN 2
AC CONTROL
+
OFF
GEN 1
OFF
OFF
12
Dash8 - Q400 - Electrical
Page 10

AC CONTROL PANEL
1. EXTERNAL POWER SWITCH (two position)
EXT PWR - connects AC external power to variable frequency buses
- is capable of powering all AC and DC buses on the aeroplane
- isolates the AC generators from the buses
- AC EXT PWR ON indication (green) is displayed on the MFD Electrical page when AC
external power is connected to the aeroplane
- an External Power Protection Unit (AC PPU) is installed in the right ACCB to ensure only
AC Power within specification is allowed on the bus
- the AC PPU checks for the following parameters:
• voltage level (under voltage trip point 106 VAC ±2%, over voltage trip
point 124 VAC ±2%)
• frequency (underfrequency trip point 370Hz ±2%, overfrequency trip
point 450Hz ±2%)
• phase rotation (A-B-C)
OFF - disconnects AC external power from variable frequency buses
2. AC GEN 1 AND 2 SWITCHES (two position)
GEN 1 OR GEN 2 - arms respective GCU to activate, and connect its generator to the asso-
ciated variable frequency bus
- AC generators are inhibited with AC EXT PWR ON
OFF - shuts respective generator down
- resets GCU for subsequent generator and circuit monitoring following shutdown of a
generator
- AC GEN 1 or 2 caution light turns on anytime the respective generator is not supplying
power
Dash8 - Q400 - Electrical
Page 11

Figure 12.5-6 Copilot’s MFD Electrical Page (1 of 3)
27.7
28.5
27.7
28.5
26.126.1
ELECTRICAL
LOAD
1 1 5
1 1 5
1 1 5
. 06
. 06
. 06
1 1 5
1 1 5
1 1 5
. 06
. 06
. 06
A
B
C
A
B
C
+22
+22
+22
+1. 00
- . 34
- . 34
+1. 00
+1. 00 . 06
+1. 00 +1. 00
APU GEN
DC GEN
LOAD
12
TRU
LOAD
12
LOAD
BATT
°C
VOLT
DC BUS
RL
MAIN
AUX
STBY
ESS
MAIN
SEC
AC GEN 1
AC GEN 2
VOLT LOAD
VOLT LOAD
DC EXT
PWR ON
AC EXT
PWR ON
HYD PRESS HYD QTY
PK
STBY
PSI x 1000 % x 100
BRK 123 123
4
2
1
2
3
4
5
FLAP
DEG
35
10
5
0
35
00
1
Dash8 - Q400 - Electrical
Page 12

MULTI FUNCTION DISPLAY (MFD) ELECTRICAL PAGE CALLOUTS
1. DC EXT POWER ANNUNCIATOR (green)
- displayed when a DC external power source is connected to the aeroplane and supply-
ing DC power within voltage tolerances
2. BATTERY LOAD AND TEMPERATURE ANNUNCIATION AREA
BATT (white)
LOAD, °C (cyan)
MAIN, AUX, STBY (white)
3. DIGITAL DISPLAY OF BATTERY LOAD (white)
- displays the load of the battery
- + or - sign on the left of the lead digit, whether the battery is in overcharge (“+” displayed)
or in discharge (“-” displayed)
- nothing is displayed when the battery is in charge within the expected range
- leading zero is suppressed in the lead digit position
- digital number gives the rate of the load, with 1.00 equal to 100% of load
- examples:
• “+1.30” indicates that the battery is in overcharge at 30% over the maximum rate of
the charge
• “.60” indicates that the battery is in charge at 60% of its maximum rate of charge
• “-0.30 “indicates that the battery is discharging at 30% over the maximum rate of
discharge
4. DIGITAL DISPLAY OF BATTERY TEMPERATURE
- battery temperature digits are displayed in white with a + or - sign on the left of the lead
digit, when the temperature is within normal limits
- when the temperature is in the range (+50°C to +65°C) the digits turn yellow
- when the temperature exceeds 65°C the digits are displayed in red
5. DC BUS VOLTAGE ANNUNCIATION AREA
DC BUS (white)
L, R (white)
VOLT (cyan)
ESS, MAIN, SEC (white)
Dash8 - Q400 - Electrical
Page 13

Figure 12.5-7 Pilot’s MFD Electrical Page (2 of 3)
27.7
28.5
27.7
28.5
26.126.1
ELECTRICAL
LOAD
1 1 5
1 1 5
1 1 5
. 06
. 06
. 06
1 1 5
1 1 5
1 1 5
. 06
. 06
. 06
A
B
C
A
B
C
+22
+22
+22
+1. 00
- . 34
- . 34
+1. 00
+1. 00 . 06
+1. 00 +1. 00
APU GEN
DC GEN
LOAD
12
TRU
LOAD
12
LOAD
BATT
°C
VOLT
DC BUS
RL
MAIN
AUX
STBY
ESS
MAIN
SEC
AC GEN 1
AC GEN 2
VOLT LOAD
VOLT LOAD
DC EXT
PWR ON
AC EXT
PWR ON
7
6
PFCS
SPOILERS
R1
R
ELEV
RUD
LO L1
L
ELEV
8
9
10
11
9
10
Dash8 - Q400 - Electrical
Page 14

MULTI FUNCTION DISPLAY (MFD) ELECTRICAL PAGE CALLOUTS (cont’d)
6. DIGITAL DISPLAY OF DC BUS VOLTAGE (white)
- indicates the voltage on the associated bus
7. DIGITAL DISPLAY OF APU GENERATOR LOAD (white)
APU GEN (white)
LOAD (cyan)
- is activated only if the APU is installed depending on the aeroplane configuration
- the load demand on the APU generator is displayed in the following format:
• “+” sign is displayed on the left of the lead digit to indicate an overload of the DC
power source
• nothing is displayed when the load is in the expected range
• leading zero is suppressed in the lead digit position
• digital number gives the rate of the load, with 1.00 equal to 100% of load examples:
• “.60” indicates that the DC generator or TRU is loaded at 60% of the maximum out-
put
• “+1.30” indicates an overload of the DC generator or TRU
8. AC EXTERNAL POWER ANNUNCIATION (green)
- displayed when an AC external power source is connected to the aeroplane and supply-
ing AC power
9. AC GEN VOLTAGE AND LOAD ANNUNCIATION AREAS
AC GEN 1 and AC GEN 2 (white)
VOLT, LOAD (cyan)
A, B, C (white)
10. DIGITAL DISPLAY OF AC VOLTAGE (white)
- displays AC bus voltage for each phase
Dash8 - Q400 - Electrical
Page 15

Figure 12.5-8 Composite MFD Electrical Page (3 of 3)
27.7
28.5
27.7
28.5
26.126.1
ELECTRICAL
LOAD
1 1 5
1 1 5
1 1 5
. 06
. 06
. 06
1 1 5
1 1 5
1 1 5
. 06
. 06
. 06
A
B
C
A
B
C
+22
+22
+22
+1. 00
- . 34
- . 34
+1. 00
+1. 00 . 06
+1. 00 +1. 00
APU GEN
DC GEN
LOAD
12
TRU
LOAD
12
LOAD
BATT
°C
VOLT
DC BUS
RL
MAIN
AUX
STBY
ESS
MAIN
SEC
AC GEN 1
AC GEN 2
VOLT LOAD
VOLT LOAD
DC EXT
PWR ON
AC EXT
PWR ON
12
13
HYD PRESS PSI HYD QTY %
PK BRK STBY 1 2 3 1 2 3
3000 0 30003000 0 100 100 100
FLAP
DEG
35
10
5
0
35
SPOILERS
RI
R
ELEV
RUD
LO LI
L
ELEV
RO
11
11
Dash8 - Q400 - Electrical
Page 16

MULTI FUNCTION DISPLAY (MFD) ELECTRICAL PAGE CALLOUTS (cont’d)
11. DIGITAL DISPLAY OF AC GENERATOR LOAD (white)
- the load demand on the AC generator is displayed in the following format:
• “+” sign is displayed on the left of the lead digit to indicate an overload of the AC
power source
• nothing is displayed when the load is in the expected range
• leading zero is suppressed in the lead digit position
• digital number gives the rate of the load, with 1.00 equal to 100% of load
- examples:
• “.60” indicates that the AC generator is loaded at 60% of the maximum output
• “+1.30” indicates an overload of the AC generator
12. DIGITAL DISPLAY OF DC GENERATOR LOAD (white)
DC GEN (white)
1,2 (white)
LOAD (cyan)
- DC generator load is displayed in the same manner as the APU generator load
13. DIGITAL DISPLAY OF TRU LOAD (white)
TRU (white)
1,2 (white)
LOAD (cyan)
- TRU load is displayed in the same manner as the APU generator load
Dash8 - Q400 - Electrical
Page 17

Figure 12.5-9 Pilot’s Lower Circuit Breaker Panel
L MAIN
75 75 75 75
20 20 20
251
3 3
5 5 5 5
5 5 510
50
20 20 5020 50
55510 5 5
5 5 5 5 5 5 2
5 5 20
3 3 3 1
3 5 5 5 53
5 5
1 1 3
2 2 25 5 5
5
3 505
5 10
3 10
535
335
50 5050 50
5
520
5
5
50
L MAIN
RESTRICT
CV HTR
ECS/BA CONT
L AUTO R MAN
DE-ICE
IND 1
DR SEAL
VOLT
IND
CABIN SIDEWALL
LAVATORY
EXT LTS
VOLT
IND
O/H
CONS
GLARE
SHIELD
PLT FLT
PLT
MAP LTS
STAIR
L
FLARE
LDG
CONT 1
TAXI
CONT
TAXI
PWR
CMPS STBY
STORM/PLT
CB PNL
LTSSIGNS
WARN
PASS
LTS
ADVSY
FLAPS
IND L
POS
ACT IND
ACT IND
CONT
DEICE
CONT
O/SPD
PRESS
IND 1
PLT W/S
WIPER
PROP 2
AUX PMP
STBY
HYD PRESS
PWR 1 CONT LTS
LTSINSP
L WING
L PWR
APPR
DOME LTS FLT COMP
L SEC INPUT
PROP
AIRFRAME DEICE
LTS
FLAPS
AIL TRIM
RUD TRIM
L MAIN INPUT
AVIONIC FEEDERS
LDG GEAR
PANEL LIGHTS
EXT LIGHTS
QRS
P
N
M
L
K
J
H
G
F
E
D
C
B
A
AIR
ATT RDG
1
2
3
4
5
6
7
8
9
10
5
50
L ESS
BUS 1
55
CONT
RUD SYS
ISOL
NLG
STEER
CONT 1
ALT
DLK IND
WOW 2
+ CONT
ENG
MONITOR
CABIN PRESS
AUTO CONT
LDG GEAR
33
25
TEST
3
V/HTR
#1 & #2
V/HTR
#5
CV/DRAIN
HTRS
1
PLT
WS/HT
CONT
INTK DEF
ACT 1
MAINT
PNL
PROP 2
ALT FEATH
50
INPUT 1 INPUT 2
AUX BATT
INPUT 1 INPUT 2
AVIONIC FEEDERS
DC PWR
MON BUS TIE
HYD
PRESS
IND 1
RIGHT
BUS TIE
DC GEN 1
EXCITE
AUX BATT
CONT
BUS FAULT
RESET SW
HYD SYS
CONT
FIRE DET
ENG 1
VLV IND IND
3
WOW 2
+ CONT
ALT
DLK IND
5
ENG
START
PROP 1
PEC A
PROP 2
PEC B
FAN 1
PWR SEC
5
PROP 1 BETA
LTS SOL ECIU A
ENG 1
IGN A
ENG 2
IGN A
CABIN
PRESS
MAN
DE-ICE
CONT
PITCH
TRM
ACT 1
FEEL
ACT 1
ENG 1
FADEC A
ENG 2
FADEC A
FUEL
HLCU
REFUEL DEFUEL
CARGO
IND
FCS
ECU 1
STBY
ALT
STBY
ATT
WRB &
BAGGAGE FLT ATT
ADV SIGNS
VHF
COM 1
VHF
NAV 1
ARCDU
1
PLT
AUDIO
7
12
7
12
7
12
7
12
7
12
AC GEN
CONT 1
TRIM
IND
3
3
5
ENG 1
OIL CLG
20 20
FAN 3
PWR SEC
FAN 1
PWR PRI
5
EMERGENCY
LIGHTS
RELAY
10 3
5
LT
7
12
5
EMER
LTS
7
12
50
L ESS
BUS 2
75
STBY
BATT
L ESSENTIAL L SECONDARY
Dash8 - Q400 - Electrical
Page 18

Figure 12.5-10 Pilot’s Upper Circuit Breaker Panel
1
ALT 2
RAD
3
5
5
FGM 2
10P
10M/
FGM 1
ATC
1
5
ANT SW
ATC
10 10
2
1
7
2
1
7
2
1
7
2
1
7
210 1
2
10
2
10
2
10
3
3
2
3
2
1
1
1
10 555
2
1
7
2
1
7
2
1
7
5
555
55 5
5
55
5
55
1
2
1
5555
5522 1/2
15
10
3
ESS
RIGHT
ESS
LEFT
MAIN
LEFT
MAIN
RIGHT
AUDIO
OBS
1 CP
AHRS
1
AHRS
NAV 2
VHF
CP
EFIS
ESID
2
PFD
COM 2
VHF
2
ICP
2
MFD
2
ADU
1
ICP
1
MFD
1
ADU
AMP
PA
ANN 2
DISENG
AP
SPKR
COPLT
ESID
ATT
STBY
1 CP
AHRS
1
AHRS
2
AHRS
2 CP
AHRS
AUDIO
COPLT
2
ARCDU
ELT
SPKR
PLT
STBY
COM
VHF
1
CLOCK
ANN
FLT ATTD
PUSHER
STICK
10P
10M/
CP 2
FG
2
CLOCK
1
FG CP
ANN 1
DISENG
AP
SPM 2
CVR 2
DME
2
ADF
2
FMS
2
MLS
2
ATC
AMP
HF 2
COM 2
HF
AMP
HF1
COM 1
HF
ALT 1
RAD
SELCAL
1
MLS
WX RDR
1
FMS
1
ADF
1
DME
SPM 1ROLL
AP AU
FDRYD AU
2 CP
AHRS
2
AHRS
CP
VHF 3
CP
EFIS
CP
ESID
1
PFD
PWR
HANDSET
FLT ATTD
PUSHER
STICK
WX CP
PITCH
AP AU
COM 3
VHF
TCAS
1
2
3
4
5
6
7
8
9
10
11
ANN
GPWS
GPWS
QPNMLKHJGFEDCBA
2
Dash8 - Q400 - Electrical
Page 19

Figure 12.5-11 Copilot’s Lower Circuit Breaker Panel
50
75757575
5
25
25
30 30
20 20
5 5
5555
5
3 3 3
5555
1
20 20 20
50
75
20 5520
55551055
5 5 5 25 5
55555
5
5 3 3 5 5 5
105551
20 15 5
315
35
10
355
53
50 50
50 50
2
5
QRS
P
N
M
L
K
J
H
G
F
E
D
C
B
A
1
2
3
4
5
6
7
8
9
10
READING LTS
CABIN
LTS
PWR 2RL
CABIN LTS
PWR 1CONT
PANEL LIGHTS
CTR
CONS
ENG
INSTR
COPLT
FLT
COPLT
MAP LTS
ANTISKID
OUTBDINBD
NLG
STEER
CONT 2
APU
FIRE
GEN EXC
VOLT
IND AVIONIC FEEDERS
R MAIN
R MAIN INPUT
BUS 1
R ESS
CABIN
SIDEWALL
LTS PWR 2
GALLEY
PWR
EXT LTS
R
FLARE
R WING
INSP
CABIN
DUCT
TEMP IND
COPLT
W/S
WIPER
PROP
DEICE
CONT 2
ENG 2
OIL CLG
R SECONDARY
R SEC INPUT
APU/CARGO
MAN EXT
FLT COMP DOME LTS
BOARD'G
LTS
EXT LTS
ANTI COLL
LDG
CONT 2
APPR
R PWRPOSN
REFUEL DEFUEL
COPLT
CB PNL
LTS
LDG GEARROLL SPLRS
IND
OUTBD
ARM
INBD
FLAP
POSN
IND R
FIRE DET
ENG 2
APU
DC
GEN 2
EXCITE
DC BUS
TIE
CONTLOGIC
PWR EXT
R ESSENTIAL
MN BATT
5
712
712
712
712
712
712
712
712712
50
COPLT-WS
PLT-MOD
HT CONT
AUTO
DIST VLV
CV DRN
HTRS
V/HTR
#3 & #4
V/HTR
#6
ENG 2
MAIN OIL
1
3
1
INTAKE
DEFLECT
ACT 2
50
PROP 1
AUX PMP
STBY HYD
PMP 1
FUEL XFER
PANEL
PROP 1
ALT FEATH
STBY
BATT
R MAIN
INPUT 1 INPUT 2 INPUT 1 INPUT 2
DC
PWR MON BUS TIE
50
AVIONIC FEEDERS
SEC
BUS TIE
LEFT
BUS TIE
BATT CONT
STBY MAIN
PWR
XFER
PRESS
IND 2
IND
ENG 2
VLV IND IND
PITOT
HTR
STBY
HYD
SYS 3
CONT
55
PROP 1
PEC B
PROP 2
PEC A
FCS
ECU 2
WOW 1
+ IND
WOW 1
+ IND
712
3 3 5 5
PROP 2 BETA
LTS SOL ECIU B
ENG 1
IGN B
ENG 2
IGN B
SMK DET
LAV/CGO1 BAG/CGO2
CAUT/WRN
LTS 1
PITCH
TRM
ACT 2
FEEL 2
ACT 2
ENG 1
FADEC B
ENG 2
FADEC B
712
PA EMER
PWR
HYD SOV
ENG 1 ENG 2
FUEL SOV
ENG 1 ENG 2
ENG 1 ENG 2
FIRE EXT/CONT AMP
1 & 2 ENG CARGO
1
CLOCK
12
CLOCK
BATTERY MASTER SW
BATT
REFUEL
5
BATTERY PWR
FUEL & FMU
712
CAUT/WRN
LTS 2
1
DE-ICE
CONT
PLT
WDO HT
RLY
AC GEN
CONT 2 L MAN R AUTO
AFR
DE-ICE
BOOT LTS
ECS/BA CONT
50
BUS 2
R ESS
50 50
FAN 2
PWR SEC
5
IND
VOLT
PRESS
IND 2
5
PRESS
MN BATT
COOLING
FAN CONT
120
HYD
AIRFRAME
MANUAL
CONT
5
3
55
712
712
2020
FAN 2
PWR PRI
FAN 3
PWR PRI
CGO
VENT VLS
3
CONT PWR
PWR 1 PWR 2 PWR 3 CTRL
NVS
AIRFRAME DEICE
Dash8 - Q400 - Electrical
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