Dash8-200/300 - Electrical - SmartCockpit · Bus fault operation The bus bar protection unit provides the starter/generators and batteries with automatic ... Dash8-200/300 - Electrical

ELECTRICAL SYSTEM

CONTROLS AND INDICATORS

Battery temperature monitor

Failure of a display sensor is indicatedwith single amber LED element on thescale at 60ºC.

BATTERY TEMPERATURE DISPLAY SCALES

Displays each battery temperaturewith oval-shaped light emitting diode(LED) elements. The appropriate display scaleilluminates from left to right on thenumbered scale to indicate relatedbattery temperature.

BATTERY OVERHEAT SENSORFAILURE LED (MAIN AND AUX) ON – to indicate failure of appropriatebattery overheat sensor.

BATTERY MONITOR TEST SWITCH

Three position TEST switch (press, select left &select right) provides three test simulations: Press TEST switch: -To simulate 70ºC temperature in each battery. -MAIN and AUX temperature scales go to 70ºC. -MAIN BAT HOT, AUX BAT HOT and MASTERWARNING lights illuminate flashing. Release TEST switch: -Both scales return to battery ambient. Select TEST to left and hold: -Simulates shorted sensor circuits on both batteries. -Both SENSOR FAIL LED's and LED elements at60ºC illuminate. -Both temperature scales are illuminatedprogressively from battery ambient temperature tofull scale and then extinguish. -MAIN BAT HOT, AUX BAT HOT, and MASTERWARNING lights illuminate flashing. Release TEST switch: -Temperature scales return to battery ambient. -All LED elements are illuminated simultaneouslyfollowed by a progressive extinguishing from fullscale to battery ambient. Select TEST switch to right: -Simulates open sensor circuits in both batteries. -Both SENSOR FAIL LED's and the 60ºC LEDelements are illuminated. -The ambient temperature elements extinguish. Release TEST switch: -Both scales return to battery ambient.

Dash8-200/300 - Electrical

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DC power control panel

or


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DC power control panel

-Generators are inhibited from connection to their feeder busses when External Power Unit is operating


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DC system indicator panel

± .03% V ± .3V


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AC power control panel


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AC system indicator panel

% ± .03% V ± 3V


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AC system indicator panel


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DC power schematic


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SYSTEM DESCRIPTION

General

The electrical system provides 28 Volt DC to the majority of electrical services. A starter/generator on each engine provides the main DC power, supplemented by two 24 Volt nickel-cadmium batteries. Two transformer-rectifier units (TRU's) convert 115 Volt AC power into 28 Volt DC for backup and load sharing purposes. A DC external power receptacle provides an input for an external power source. In normal conditions the DC generators are not working in parallel. AC power is provided by two engine driven AC generators and three solid-state static inverters. The AC generators provide three phase, 115 Volt, variable frequency AC and never work in parallel. The static inverters provide single phase, 115 Volt, 400 Hz AC, mainly for avionics usage. A bus bar system distributes the current throughout the aircraft. The bus bar protection unit (BBPU) controls contactors to link and protect the buses in non-normal conditions. DC Power

Batteries and essential buses

Both batteries (main and aux) have a 40 Amp hour capacity and power their respective battery buses. When the BATTERY MASTER switch is selected ON, both batteries feed their onside essential bus. As the essential buses are paralleled through the bus tie circuit breaker, both buses will be powered from either battery in normal situations. The main battery can be connected directly to the right main feeder bus by selecting the MAIN BATT switch ON. This provides power for engine start and, once an engine is running and its generator has come on line, charging capacity for the main battery. The auxiliary battery does not deliver power to the main busses, only to its battery bus and the essential buses. Switching the AUX BATT switch ON enables charging of the auxiliary battery from the left main feeder bus. Engine-driven generators and main feeder buses

The starter/generator mounted on the accessory gearbox of each engine, serves as a starter motor and converts to a generator after attaining operational speed. Each generator output is monitored and controlled by its generator control unit (GCU). After engine start, the GCU will monitor the generator output and maintain 28 Volt DC. Variation of engine speed and electrical loads will have no influence on voltage. In normal operation GEN 1 powers the left main feeder bus, GEN 2 normally powers the right main feeder bus. The main busses provide power to the essential buses directly, charge the main and aux batteries and are a backup power source to the secondary buses in non-normal situations.


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Transformer Rectifier Units (TRU’s) and secondary feeder buses

Each TRU receives three phase, 115 Volt, variable frequency AC input power and converts it to 28 Volt DC output. The number 1 and number 2 TRU’s power the left and right secondary feeder buses respectively. A TRU powers its onside secondary feeder bus when its output voltage exceeds 18 Volt DC, and disconnects power when the voltage drops below 18 Volt DC. NOTE: The TRU output voltage can fluctuate between 25.0 and 29.5 Volt depending on

secondary feeder bus load. Automatic bus tie operation

Four bus tie relays, consisting of a main bus tie, a secondary bus tie and two main/secondary bus ties are automatically controlled by the DC logic incorporated in the bus bar protection unit (BBPU). The BBPU connects buses when power sources fail, and inhibits contact being made if a bus fault occurs. If a DC generator fails, the main DC bus tie contactor closes connecting the main buses. If a TRU fails the secondary bus tie closes connecting the secondary buses. If both DC generators fail, the left and right bus tie contactors close connecting the secondary buses to the main buses. The TRU’s can now maintain DC voltage to the buses. If both TRU’s fail, similarly the left and right bus tie contactors close and the DC generators continue to supply the secondary buses. Bus fault operation

The bus bar protection unit provides the starter/generators and batteries with automatic protection from a bus fault and overload. It also monitors the GCU's for any over-current conditions. If a bus fault occurs, the BBPU opens and inhibits the main bus tie and the main/secondary bus tie contactors. They are prevented from closing to ensure the bus fault is isolated. The DC BUS caution light now illuminates. If the fault persists longer than 7 to 10 seconds, an over current may have occurred from the generator supplying the bus and it will automatically shut down. The battery connected to this bus will be isolated. The MAIN BATTERY or AUX BATTERY caution light and related DC GEN caution light will illuminate and all services on the faulty bus will be lost. The caution lights associated with these services will also illuminate. The BBPU continues to monitor the operating buses.

NOTE: Manual operation of the main bus tie through the MAIN BUS TIE switch is

inhibited once the BBPU has reacted to a fault. An attempt to restore power from the other bus may be made by momentary selecting the bus fault reset switch to BUS FAULT RESET. This rearms the BBPU.

CAUTION: Affected battery and generator should be selected OFF.


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DC external power

The external power receptacle provides a DC input for an external power source, which can be used instead of the batteries for starting the engines. With external power plugged in and supplying DC power, the BATTERY MASTER and EXTERNAL POWER switch must be selected ON. The external power advisory light illuminates, the main feeder and essential buses receive DC power. However the generators are inhibited from coming on line. This has no effect on the starter mode sequence. A fault in the external power source will disconnect it from the airplane electrical system. If the fault clears the external power source can be re-selected by selecting the external power switch OFF then to ON. To prevent any power interruption when the external power source is unplugged from the receptacle, the BATTERY MASTER, MAIN BATT and AUX BATT switches must be selected ON. DC system operation

The engines can be started using the batteries. Selecting the BATTERY MASTER switch ON powers the essential buses that energizes limited DC equipment and the static inverters for 115 volts and 26 volts AC 400 Hz buses. The main and auxiliary battery switches are selected to MAIN BATT and AUX BATT. The right main bus is now powered, and all bus tie contactors are open. After the first engine starts and the generator switch is selected ON, the main bus tie contactor closes and the generator powers left and right main buses. After the second engine starts and its generator is selected ON, the main bus tie contactor opens. Both contactors connecting the main buses to the secondary buses close. All DC and fixed frequency AC buses are now energized. Battery temperature monitor

The battery temperature monitor continuously displays main and auxiliary battery temperatures, and overheat warnings from sensors on each battery. A three position test switch provides simulated overheat and short circuit conditions for operational checks.


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Variable frequency AC power schematic


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AC Power

General

There are two types of AC power in the electrical system, the variable frequency AC and fixed frequency AC. The variable frequency AC system can be powered by an external power source. Variable frequency AC

Variable frequency AC power is supplied by two AC generators, which provide power for anti-icing heaters, electric pumps and to power the TRU’s. Each GCU controls its respective generator, which provides 115 ± 2.8 Volt AC to the A, B and C phase, variable frequency buses. A low bus voltage (below 90 Volt) indicates a faulty bus, and illuminates the associated AC BUS caution light. A bus voltage exceeding 125 Volt causes the associated generator to be shut down. During normal operation a bus tie contactor separates the left and right side buses. In the event of a generator failure, the bus tie closes automatically allowing the operating generator to maintain AC power to left and right side variable frequency buses. An external power receptacle provides input for an external ground power source. AC control

With one AC generator switch selected ON and its generator providing 115 volts AC, the bus tie contactor connecting the left and right variable frequency buses closes. Both buses are now powered from one AC generator. As the other generator also comes on line the bus tie contactor opens, and the left and right variable frequency buses are now powered independently from their respective AC generators. AC external power

The AC external power receptacle, located on the lower inboard side of the number 2 engine cowling, makes the use of an AC external power source possible. An external power switch controls the power to the variable frequency buses. When selected to EXT POWER, contactors operating in conjunction with the bus tie connect the power source directly to the left and right variable frequency buses. An external power advisory light illuminates when external power is plugged into the receptacle, and the EXT POWER switch is selected ON. A protection unit monitors the external power source for faults (abnormal voltage, current or phase sequence). If a malfunction is detected, the unit switches the external power system off and the advisory light will go out.


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Fixed frequency AC power schematic


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Fixed frequency AC power

Three solid-state static inverters, primary, secondary and auxiliary, supply 115 Volt and 26 Volt AC, 400 Hz to the 115 Volt AC buses. The buses then supply navigation- and communication equipment and certain flight- and engine instruments. The inverter outputs operate in parallel. The auxiliary inverter may be selected to L or R to supply either bus in normal operation. Input to each inverter is 28 Volt DC. The left essential bus powers the primary inverter, the right essential bus powers the secondary inverter and the left main bus powers the auxiliary inverter. The primary and secondary inverters supply 115 Volt AC through the paralleling control box to the left and right 115 Volt AC buses respectively. A bus tie circuit breaker connects the two buses together. The 26 Volt AC buses each receive power from a step-down transformer, which is powered by the respective 115 Volt AC bus. Inverter control

With the essential buses and left main bus powered, and the inverter switches selected to PRIMARY, L and SECONDARY, each inverter generates 115 Volt AC 400 Hz single phase. The paralleling control box synchronizes the 400 Hz, and applies the 115 Volt AC from the three inverters in parallel to the left and right 115 Volt AC buses. 12-06.2.4. DC Power distribution

If both AC generators and both DC generators are shut down, and the BATTERY MASTER switch is ON, the following services are powered from the essential buses. Advisory lights Flap control & indication AHRS 1 & 2 Flight compartment dome lights Aileron trim actuator & indicator Fuel & hydraulic shut off valves Baggage lights Fuel quantity indication Battery temperature indication Hydraulic power transfer Caution lights Hydraulic pressure indication CB panel lights Hydraulic quantity indication Clock 1 Landing gear control & indication Cockpit Voice Recorder PA & cabin interior audio Elevator standby trim Passenger signs Emergency lights PFCS Indicator Engine Control Units (ECU's) Left and right EADI & EHSI Engine fire detection & extinguishing Pilot and co-pilot audio Engine ignition & start control Pitot heat 1 and static heat 1 Position lights Torque indicators Roll spoilers emergency control ITT indicators Rudder trim actuator & indicator Np indicators Smoke detectors Nh indicators Standby attitude indicator Oil temperature indicators Storm lights Oil pressure indicators VHF COM 1 Flight Data Recorder VHF NAV 1 WARNING: Battery duration for operation of essential services is 30 minutes.


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AC Power distribution

The following services are powered from the fixed frequency 115 Volt AC and 26 Volt AC buses. LEFT 115 Volt AC RIGHT 115 Volt AC AFCS 1 FAN AFCS 2 FAN AFCS 1 NAV SWITCHING AFCS 2 NAV SWITCHING FDR H.S. PLAYBACK CVR ERASE FDR REC CVR REC GPWS NORM WEATHER RADAR GPWS WARN LEFT 26 Volt AC RIGHT 26 Volt AC ADF 1 ADF 2 ADI 1 ADI 2 ALT 1 ALT 2 HSI 1 HSI 2 HYD QTY 1 IND + TRANS HYD QTY 2 IND + TRANS PFCS IND RMI 1 RMI 2 VHF NAV 2 VHF NAV 1 The following services are powered from the variable frequency 115 Volt AC buses. L AC BUS R AC BUS Co-pilot's windshield heat (warm-up) Co-pilot's windshield heat (full) Left alpha vane heater Right alpha vane heater Left auxiliary fuel pump Right auxiliary fuel pump Left elevator horn heat Right elevator horn heat Left engine intake heater Right engine intake heater Left propeller de-icing Right propeller de-icing Left TRU Right TRU Pilot's side window heat Number 2 standby hydraulic pump Pilot's windshield heat (full & warm-up) Number 1 standby hydraulic pump (alternate)Number 2 standby hydraulic pump (normal) 12-06.2.6. Circuit protection

This section summarizes the circuit breaker protection of all system by a listing of all circuit breakers. Circuit breakers are listed following the chapter breakdown used in this manual and are cross-referenced to their respective panels and locations. Circuit breaker panel illustrations are typical and may not represent all combinations of options or modification status. The power distribution diagrams and the circuit breaker panel illustrations in this section will facilitate identification of system power sources and their circuit breaker protection.


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Right DC circuit breaker panel


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Left DC circuit breaker panel


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Avionics circuit breaker panel


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Variable frequency AC circuit breaker panel


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Circuit breakers and locations

SYSTEM GRID REF CIRCUIT BREAKER PANEL

CHAPTER 5 GENERAL (LIGHTING, LAVATORY, GALLEY)

ADVSY LTS 1 F3 LEFT DC CB PANEL ADVSY LTS 2 E3 LEFT DC CB PANEL BAGGAGE LIGHTS K3 RIGHT DC CB PANEL BATTERY PWR BOARDING LTS G1 RIGHT DC CB PANEL EMER LTS L1 RIGHT DC CB PANEL FLT COMP DOME LTS H1 RIGHT DC CB PANEL BRT & WRB FCG LTS Q2 LEFT DC CB PANEL BUFFET PWR C1 RIGHT DC CB PANEL CABIN LTS CONT R3 RIGHT DC CB PANEL PWR 1 S2 RIGHT DC CB PANEL PWR 2 S1 RIGHT DC CB PANEL CABIN SIDEWALL LTS CONT Q3 LEFT DC CB PANEL PWR 1 P3 LEFT DC CB PANEL PWR 2 B1 RIGHT DC CB PANEL COPLT CB PANEL LTS M4 RIGHT DC CB PANEL COPLT MAP LTS P3 RIGHT DC CB PANEL EMER LTS C3 RIGHT DC CB PANEL EXT LTS APPR L PWR N2 LEFT DC CB PANEL L WING INSP P2 LEFT DC CB PANEL EXT LTS POSN M2 RIGHT DC CB PANEL APP R PWR N2 RIGHT DC CB PANEL LDG CONT 2 P2 RIGHT DC CB PANEL ANTI COLL Q2 RIGHT DC CB PANEL EXT LTS R FLARE D1 RIGHT DC CB PANEL R WING INSP E1 RIGHT DC CB PANEL EXT LTS TAXI PWR A2 LEFT DC CB PANEL TAXI CONT B2 LEFT DC CB PANEL LDG CONT 1 C2 LEFT DC CB PANEL L FLARE D2 LEFT DC CB PANEL AIR STAIR E2 LEFT DC CB PANEL FLT COMP DOME LTS N3 LEFT DC CB PANEL LAVATORY FLUSH S3 LEFT DC CB PANEL LTS R3 LEFT DC CB PANEL LAV WATER SYS PUMP D2 RIGHT DC CB PANEL HTR E2 RIGHT DC CB PANEL LAV WATER HTR - VAR FREQ AC CB PANEL LOGO L C1 LEFT DC CB PANEL LOGO R D1 LEFT DC CB PANEL NVS CONT C2 RIGHT DC CB PANEL PWR 1 A2 RIGHT DC CB PANEL PWR 2 B2 RIGHT DC CB PANEL PANEL LTS COPLT FLT Q3 RIGHT DC CB PANEL ENG INSTR R3 RIGHT DC CB PANEL RAD CONS S3 RIGHT DC CB PANEL LIST CONTINUES ON NEXT PAGE



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CHAPTER 5 GENERAL (CONTINUED)

PASS WRN SIGNS H3 LEFT DC CB PANEL PLT MAP LTS D3 LEFT DC CB PANEL PANEL LTS O/H CONS A3 LEFT DC CB PANEL GLARESHIELD B3 LEFT DC CB PANEL PLT FLT C3 LEFT DC CB PANEL READING LTS L Q1 RIGHT DC CB PANEL R R1 RIGHT DC CB PANEL STORM/PLT CB PNL LTS J3 LEFT DC CB PANEL WARM W/WASH FAN HT S5 LEFT DC CB PANEL W/WTR WASH FAN F9 AVIONICS CB PANEL CHAPTER 6 AIR CONDITIONING AND PRESSURIZATION

CABIN DUCT TEMP IND C6 RIGHT DC CB PANEL CABIN PRESS CONT C4 LEFT DC CB PANEL CABIN PRESS IND P6 LEFT DC CB PANEL CABIN TEMP AUTO E4 LEFT DC CB PANEL CABIN TEMP MAN S6 RIGHT DC CB PANEL F/COMP TEMP AUTO N5 RIGHT DC CB PANEL F/COMP TEMP M/CONT B8 LEFT DC CB PANEL RECIRC FLT COMP CONT A6 RIGHT DC CB PANEL RECIRC FAN CONT N6 LEFT DC CB PANEL RECIRC FAN PWR S10 LEFT DC CB PANEL RECIRC FAN PWR A10 RIGHT DC CB PANEL CHAPTER 7 AUTOMATIC FLIGHT

A/P DISENG ANNUN G1 LEFT DC CB PANEL ADC 1 P1 LEFT DC CB PANEL ADC 2 E8 AVIONICS CB PANEL ADV DISP 1 C3 AVIONICS CB PANEL ADV DISP 2 C6 AVIONICS CB PANEL AHRS 1 K1 LEFT DC CB PANEL AHRS 1 AUX F1 RIGHT DC CB PANEL AHRS 2 C8 AVIONICS CB PANEL AHRS 2 AUX F1 LEFT DC CB PANEL LIST CONTINUES ON NEXT PAGE



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CHAPTER 7 AUTOMATIC FLIGHT (CONTINUED)

ALT ALERT (2) E4, E7 AVIONICS CB PANEL ATT 1 (Blank) D1 AVIONICS CB PANEL ATT 2 (Blank) D2 AVIONICS CB PANEL FGC 1 D5 AVIONICS CB PANEL FGC 1 SERVO D4 AVIONICS CB PANEL FGC 1 Y/D D3 AVIONICS CB PANEL FGC 2 D8 AVIONICS CB PANEL FGC 2 SERVO D7 AVIONICS CB PANEL FGC 2 Y/D D6 AVIONICS CB PANEL HDG 1 C1 AVIONICS CB PANEL HDG 2 C2 AVIONICS CB PANEL HDG/CRS ERROR 1 F1 AVIONICS CB PANEL HDG/CRS ERROR 2 F2 AVIONICS CB PANEL INST COMP (Blank) G2 AVIONICS CB PANEL NAV SW & ANN 1 E3 AVIONICS CB PANEL NAV SW & ANN 2 E6 AVIONICS CB PANEL Y/D RECTR J5 AVIONICS CB PANEL CHAPTER 8 AUXILIARY POWER UNIT

APU AUX N8 RIGHT DC CB PANEL BLEED AIR P8 RIGHT DC CB PANEL MAIN Q8 RIGHT DC CB PANEL FUEL R8 RIGHT DC CB PANEL VENT S8 RIGHT DC CB PANEL APU GEN EXCITE F10 RIGHT DC CB PANEL FIRE DETECT APU F7 RIGHT DC CB PANEL CHAPTER 9 COMMUNICATIONS

COPLT AUDIO L4 RIGHT DC CB PANEL CVR M2 LEFT DC CB PANEL CVR A10 AVIONICS CB PANEL FDAU G2 LEFT DC CB PANEL FDR A9 AVIONICS CB PANEL FDR STAT H2 LEFT DC CB PANEL HF COMM (2) H4, H5 AVIONICS CB PANEL OBS AUDIO H7 AVIONICS CB PANEL PA CAB INTPH PWR M1 LEFT DC CB PANEL PA EMER PWR J1 RIGHT DC CB PANEL PASS BRIEF L5 AVIONICS CB PANEL PLT AUDIO L1 LEFT DC CB PANEL SELCAL (Blank) K5 AVIONICS CB PANEL VHF 1 H1 LEFT DC CB PANEL VHF COMM 2 H8 AVIONICS CB PANEL Circuit breakers and locations


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CHAPTER 10 ELECTRICAL

115 V BUS TIE D11 AVIONICS CB PANEL 115/26 VOLT AC XFMR LT H9 AVIONICS CB PANEL 115/26 VOLT AC XFMR RT G10 AVIONICS CB PANEL AC GEN CONT 1 K9 LEFT DC CB PANEL AC GEN CONT 2 K9 RIGHT DC CB PANEL AUX BATT CONT J8 LEFT DC CB PANEL AUX BATT INPUT M9 LEFT DC CB PANEL AUX INV IN G9 AVIONICS CB PANEL AUX INV IN F10 AVIONICS CB PANEL AUX INV PWR D8 LEFT DC CB PANEL CONT E8 LEFT DC CB PANEL AVIONICS FEEDERS (3) A,B,C 9 LEFT DC CB PANEL AVIONICS FEEDERS (3) Q,R,S 9 RIGHT DC CB PANEL BATT TEMP IND L8 RIGHT DC CB PANEL CAUT LTS M8 RIGHT DC CB PANEL BUS FEED 1 M5 AVIONICS CB PANEL BUS FEED 1 J8 AVIONICS CB PANEL BUS FEED 2 N4 AVIONICS CB PANEL BUS FEED 2 K7 AVIONICS CB PANEL BUS FEED 3 P3 AVIONICS CB PANEL BUS FEED 3 L6 AVIONICS CB PANEL BUS TIE K10 LEFT DC CB PANEL BUS TIE K10 RIGHT DC CB PANEL DC BUS TIE CONT G8 RIGHT DC CB PANEL DC GEN 1 EXCITE G9 LEFT DC CB PANEL DC GEN 2 EXCITE H8 RIGHT DC CB PANEL DC LOGIC CONT F9 LEFT DC CB PANEL EXT PWR LOGIC F8 RIGHT DC CB PANEL GSB FEED L MAIN AA4 LEFT DC CB PANEL GSB FEED R ESS T2 RIGHT DC CB PANEL GSB FEED R MAIN T4 RIGHT DC CB PANEL INV WRN CONT H8 LEFT DC CB PANEL L ESS BUS E9 LEFT DC CB PANEL L MAIN INPUT L9 LEFT DC CB PANEL L MAIN INPUT (4) A,B,C,D 10 LEFT DC CB PANEL L SEC INPUT (3) P,Q,R,10 LEFT DC CB PANEL L TRU - VAR FREQ AC CB PANEL L26V FAIL P1 AVIONICS CB PANEL LEFT AC VM PH A - VAR FREQ AC CB PANEL PH B - VAR FREQ AC CB PANEL PH C - VAR FREQ AC CB PANEL MAIN BATT CONT K8 RIGHT DC CB PANEL MAIN BATT INPUT L9 RIGHT DC CB PANEL PRIM INV PWR F8 LEFT DC CB PANEL CONT G8 LEFT DC CB PANEL PWR MONITOR DC H9 LEFT DC CB PANEL AC J9 LEFT DC CB PANEL LIST CONTINUES ON NEXT PAGE Circuit breakers and locations


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CHAPTER 10 ELECTRICAL (CONTINUED)

PWR MONITOR DC H9 RIGHT DC CB PANEL AC J9 RIGHT DC CB PANEL R 26V FAIL P2 AVIONICS CB PANEL R ESS BUS N9 RIGHT DC CB PANEL R MAIN INPUT P,Q,R,S 10 RIGHT DC CB PANEL R MAIN INPUT M9 RIGHT DC CB PANEL R SEC INPUT (3) C,D,E 10 RIGHT DC CB PANEL R TRU - VAR FREQ AC CB PANEL RIGHT AC VM PH A - VAR FREQ AC CB PANEL PH B - VAR FREQ AC CB PANEL PH C - VAR FREQ AC CB PANEL SEC INV PWR F9 RIGHT DC CB PANEL CONT G9 RIGHT DC CB PANEL TRU CONT L & R J8 RIGHT DC CB PANEL VOLT IND D9 LEFT DC CB PANEL VOLT IND N9 LEFT DC CB PANEL VOLT IND P9 RIGHT DC CB PANEL VOLT IND E9 RIGHT DC CB PANEL CHAPTER 11 EMERGENCY EQUIPMENT

CREW OXYGEN M3 AVIONICS CB PANEL ELT B4 AVIONICS CB PANEL CHAPTER 12 FIRE PROTECTION APU MAN EXT K1 RIGHT DC CB PANEL BATTERY PWR FIRE EXT ENG 1 & 2 F2 RIGHT DC CB PANEL FIRE EXT ENG 1 & 2 G2 RIGHT DC CB PANEL FUEL & HYD SOV ENG 1 H2 RIGHT DC CB PANEL FUEL & HYD SOV ENG 2 J2 RIGHT DC CB PANEL FUEL SOV ENG 1 K2 RIGHT DC CB PANEL FUEL SOV ENG 2 L2 RIGHT DC CB PANEL FIRE DET ENG 1 L8 LEFT DC CB PANEL ENG 2 K8 LEFT DC CB PANEL FIRE DET ÈNG 1 G7 RIGHT DC CB PANEL ENG 2 H7 RIGHT DC CB PANEL FIRE DETECT APU F7 RIGHT DC CB PANEL LAV SMK DET J10 RIGHT DC CB PANEL SMOKE DET K7 RIGHT DC CB PANEL Circuit breakers and locations


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CHAPTER 13 FLIGHT CONTROLS

AIL TRIM ACT J7 LEFT DC CB PANEL IND K7 LEFT DC CB PANEL ELEV TRIM STBY H7 LEFT DC CB PANEL FLAP POSN IND L M6 LEFT DC CB PANEL FLAP POSN IND R M7 RIGHT DC CB PANEL FLAPS CONT L7 LEFT DC CB PANEL PWR IND M7 LEFT DC CB PANEL PUSHER DUMP G6 RIGHT DC CB PANEL ROLL SPLRS INBD ARM H6 RIGHT DC CB PANEL OUTBD ARM J6 RIGHT DC CB PANEL JAM IND K6 RIGHT DC CB PANEL RUD SPEED P7 RIGHT DC CB PANEL RUD SYS ISOL 1 E7 LEFT DC CB PANEL RUD SYS ISOL 2 N7 RIGHT DC CB PANEL RUD TRIM ACT F7 LEFT DC CB PANEL IND G7 LEFT DC CB PANEL SURF POSN IND Q1 AVIONICS CB PANEL SW/SP COMP 1 K1 AVIONICS CB PANEL SW/SP COMP 1 H10 LEFT DC CB PANEL SW/SP COMP 2 K2 AVIONICS CB PANEL SW/SP COMP 2 F6 RIGHT DC CB PANEL CHAPTER 14 FLIGHT INSTRUMENTS

ADVSY 1 FAN C9 AVIONICS CB PANEL ADVSY 2 FAN C10 AVIONICS CB PANEL ALT 1 E1 AVIONICS CB PANEL ALT 2 E2 AVIONICS CB PANEL ATT 1 (Blank) D1 AVIONICS CB PANEL ATT 2 (Blank) D2 AVIONICS CB PANEL AUDIO ALT ALERT C5 AVIONICS CB PANEL BLOCK TIME RCDR (Blank) R2 LEFT DC CB PANEL CLG FAN N3 AVIONICS CB PANEL CLOCK 1 G4 LEFT DC CB PANEL CLOCK 2 R4 RIGHT DC CB PANEL COP VSI C7 AVIONICS CB PANEL EADI 1 J2 LEFT DC CB PANEL EADI 2 F6 AVIONICS CB PANEL EHSI 1 K2 LEFT DC CB PANEL EHSI 2 G6 AVIONICS CB PANEL HDG 1 C1 AVIONICS CB PANEL HDG 2 C2 AVIONICS CB PANEL PLT VSI C4 AVIONICS CB PANEL RAD ALT 1 F10 LEFT DC CB PANEL RAD ALT 2 F8 AVIONICS CB PANEL RMI 1 F4 AVIONICS CB PANEL RMI 2 F7 AVIONICS CB PANEL LIST CONTINUES ON NEXT PAGE Circuit breakers and locations


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CHAPTER 14 FLIGHT INSTRUMENTS (CONTINUED)

STBY ATT IND A H4 LEFT DC CB PANEL STBY ATT IND B L7 RIGHT DC CB PANEL STBY ATT IND PWR SUPPLY 0/P C7 LEFT DC CB PANEL I/P D7 LEFT DC CB PANEL STBY CMPS F2 LEFT DC CB PANEL SYM GEN 1 H1 AVIONICS CB PANEL SYM GEN 1 L2 LEFT DC CB PANEL SYM GEN 2 H6 AVIONICS CB PANEL SYN GEN 2 H2 AVIONICS CB PANEL WARDROBE SHELF FAN E10 AVIONICS CB PANEL CHAPTER 15 FUEL

AUX CONT PUMP 1 P4 LEFT DC CB PANEL AUX CONT PUMP 2 D4 RIGHT DC CB PANEL AUX PUMP WRN C4 RIGHT DC CB PANEL BATT REFUEL P1 RIGHT DC CB PANEL FUEL AUX PUMP 1 - VAR FREQ AC CB PANEL FUEL AUX PUMP 2 - VAR FREQ AC CB PANEL FUEL QTY IND AUX 1 (Blank) M3 LEFT DC CB PANEL FUEL QTY IND AUX 2 (Blank) F3 RIGHT DC CB PANEL FUEL TANK TEMP Q4 LEFT DC CB PANEL QTY IND 1 M4 LEFT DC CB PANEL QTY IND 2 G4 RIGHT DC CB PANEL REFUEL/DEFUEL TANK 1 L4 LEFT DC CB PANEL REFUEL/DEFUEL TANK 2 F4 RIGHT DC CB PANEL TEMP ENG 1 N4 LEFT DC CB PANEL TEMP ENG 2 E4 RIGHT DC CB PANEL CHAPTER 16 HYDRAULIC POWER

FUEL & HYD SOV ENG 1 H2 RIGHT DC CB PANEL FUEL & HYD SOV ENG 2 J2 RIGHT DC CB PANEL HYD PRESS IND 1 J4 LEFT DC CB PANEL HYD PRESS IND 2 J3 RIGHT DC CB PANEL HYD PWR XFR G3 RIGHT DC CB PANEL HYD QTY 1 N1 AVIONICS CB PANEL HYD QTY 2 N2 AVIONICS CB PANEL STBY HYD PRESS IND 1 R4 LEFT DC CB PANEL STBY HYD PRESS IND 2 B4 RIGHT DC CB PANEL STBY HYD PUMP CONT 1 Q7 LEFT DC CB PANEL STBY HYD PUMP CONT 2 D9 RIGHT DC CB PANEL Circuit breakers and locations


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CHAPTER 17 ICE AND RAIN PROTECTION AFR DEICE BOOT LTS P5 RIGHT DC CB PANEL AFR DEICE R EJECT HTRS C9 RIGHT DC CB PANEL AIRFRAME DEICE PRESS IND 1 N8 LEFT DC CB PANEL AUTO CONT P8 LEFT DC CB PANEL V/HTR 1 Q8 LEFT DC CB PANEL V/HTR L STAB R8 LEFT DC CB PANEL L EJECT HTRS S8 LEFT DC CB PANEL AIRFRAME DEICE PRESS IND 2 A8 RIGHT DC CB PANEL V/HTR R STAB B8 RIGHT DC CB PANEL V/HTR 2 C8 RIGHT DC CB PANEL MANUAL CONT E8 RIGHT DC CB PANEL COPLT W/S HT CONT Q7 RIGHT DC CB PANEL COPLT W/S WIPER A7 RIGHT DC CB PANEL DR SEAL CV HTR P7 LEFT DC CB PANEL ELEV HORN HT 2 E7 RIGHT DC CB PANEL ELEV HORN HT L N7 LEFT DC CB PANEL ELEV HRN HTR WRN A8 LEFT DC CB PANEL INTAKE LIP HTR ENG 1 - VAR FREQ AC CB PANEL INTK LIP HTR ENG 2 - VAR FREQ AC CB PANEL L AOA VANE HT - VAR FREQ AC CB PANEL L ELEV HORN HT - VAR FREQ AC CB PANEL L PROP DEICE PH A - VAR FREQ AC CB PANEL PH B - VAR FREQ AC CB PANEL L WDO HT - VAR FREQ AC CB PANEL L WSHLD HT - VAR FREQ AC CB PANEL PITOT HTR 1 H6 LEFT DC CB PANEL PITOT HTR 2 N4 RIGHT DC CB PANEL PITOT WRN J6 LEFT DC CB PANEL PLT W/S HT CONT L3 LEFT DC CB PANEL PLT W/S WIPER S7 LEFT DC CB PANEL PLT WDO/HT CONT K3 LEFT DC CB PANEL PROP DEICE CONT 1 R9 LEFT DC CB PANEL PROP DEICE CONT 2 B9 RIGHT DC CB PANEL R AOA VANE HT - VAR FREQ AC CB PANEL R ELEV HORN HT - VAR FREQ AC CB PANEL R PROP DEICE PH A - VAR FREQ AC CB PANEL PH B - VAR FREQ AC CB PANEL R WSHLD HT - VAR FREQ AC CB PANEL STAT PORT HTR 1 D4 LEFT DC CB PANEL STAT PORT HTR 2 P4 RIGHT DC CB PANEL W/S WASH PMP (Blank) C7 RIGHT DC CB PANEL Circuit breakers and locations


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CHAPTER 18 LANDING GEAR

ANTI SKID INBD Q6 RIGHT DC CB PANEL OUTBD R6 RIGHT DC CB PANEL BRAKE PRESS IND S4 RIGHT DC CB PANEL LDG GEAR CONT IND D6 LEFT DC CB PANEL WOW SYS 2 (2) E6, F6 LEFT DC CB PANEL CONT IND G6 LEFT DC CB PANEL LDG GEAR WOW SYS 1(2) N6, M6 RIGHT DC CB PANEL EMER DNLK IND L6 RIGHT DC CB PANEL NLG STEER CONT P6 RIGHT DC CB PANEL NLG STEER IND B6 LEFT DC CB PANEL CHAPTER 19 NAVIGATION

ADF 1 (2) B5, B1 AVIONICS CB PANEL ADF 2 (2) B8, B2 AVIONICS CB PANEL ATC 1 A4 AVIONICS CB PANEL ATC 2 A7 AVIONICS CB PANEL DME 1 A5 AVIONICS CB PANEL DME 2 A8 AVIONICS CB PANEL GPS (Blank) G3 AVIONICS CB PANEL MLS 1 (Blank) G5 AVIONICS CB PANEL MLS 2 (Blank) G8 AVIONICS CB PANEL RDR GRPH (Blank) K4 AVIONICS CB PANEL RNAV 1 (2) G4, J1 AVIONICS CB PANEL RNAV 1 ACU (2) J4, L1 AVIONICS CB PANEL RNAV 2 (2) G7, J2 AVIONICS CB PANEL RNAV 2 ACU (2) J7, L2 AVIONICS CB PANEL RNAV DATA L3 AVIONICS CB PANEL VOR 1 A1 AVIONICS CB PANEL VOR 1 J1 LEFT DC CB PANEL VOR 2 (2) A6, A2 AVIONICS CB PANEL WEA RDR (2) B7, B10 AVIONICS CB PANEL WEA RDR IND B6 AVIONICS CB PANEL CHAPTER 20 PNEUMATICS

BLEED SYS CONT 1 B5 LEFT DC CB PANEL BLEED SYS CONT 2 R5 RIGHT DC CB PANEL BLEED SYS FLOW CONT Q5 LEFT DC CB PANEL BLEED SYS FLOW CONT D5 RIGHT DC CB PANEL Circuit breakers and locations


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AACHAPTER 21 POWERPLANT

ENG ECU 1 K4 LEFT DC CB PANEL ECU ENG 2 H3 RIGHT DC CB PANEL ENG 1 ITT IND F5 LEFT DC CB PANEL NP IND G5 LEFT DC CB PANEL NH IND H5 LEFT DC CB PANEL IGN J5 LEFT DC CB PANEL OIL PRESS IND K5 LEFT DC CB PANEL NL IND L5 LEFT DC CB PANEL OIL TEMP IND M5 LEFT DC CB PANEL ENG 1 TORQUE IND K6 LEFT DC CB PANEL COND L6 LEFT DC CB PANEL ENG 2 ITT IND F5 RIGHT DC CB PANEL NP IND G5 RIGHT DC CB PANEL NH IND H5 RIGHT DC CB PANEL TORQUE IND J5 RIGHT DC CB PANEL COND K5 RIGHT DC CB PANEL IGN L5 RIGHT DC CB PANEL ENG 2 NL IND H4 RIGHT DC CB PANEL OIL PRESS IND J4 RIGHT DC CB PANEL OIL TEMP IND K4 RIGHT DC CB PANEL ENG COND E3 RIGHT DC CB PANEL ENG START M5 RIGHT DC CB PANEL FUEL FLOW IND ENG 1 C5 LEFT DC CB PANEL FUEL FLOW IND ENG 2 Q5 RIGHT DC CB PANEL IND LCD HTR S2 LEFT DC CB PANEL IND LCD HTR A1 RIGHT DC CB PANEL INTAKE DEFLECT ACT 1 B5 RIGHT DC CB PANEL INTAKE DEFLECT ACT 2 C5 RIGHT DC CB PANEL MFC ENG 1 J10 LEFT DC CB PANEL MFC ENG 1 J7 RIGHT DC CB PANEL MFC ENG 2 M8 LEFT DC CB PANEL MFC ENG 2 H10 RIGHT DC CB PANEL PLA TEMP AF CONT G10 RIGHT DC CB PANEL PLA TEMP AF CONT G10 LEFT DC CB PANEL PROP ALTN FEATH Q4 RIGHT DC CB PANEL PROP AUX PUMP 1 S4 LEFT DC CB PANEL PROP AUX PUMP 2 A4 RIGHT DC CB PANEL PROP AUX PUMP IND F4 LEFT DC CB PANEL PROP BETA LTS G3 LEFT DC CB PANEL PROP O/SPD S9 LEFT DC CB PANEL PROP SYNC D3 RIGHT DC CB PANEL Circuit breakers and locations


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CHAPTER 22 WARNING SYSTEMS

A/P DISENG AUD WARNING N1 LEFT DC CB PANEL AC OSPD A6 LEFT DC CB PANEL ALT ALERT (2) E4, E7 AVIONICS CB PANEL AUDIO ALT ALERT C5 AVIONICS CB PANEL CAUT LTS 1 (2) M1, N1 RIGHT DC CB PANEL CONTACT WRN N3 RIGHT DC CB PANEL DOOR WRN B4 LEFT DC CB PANEL GPWS B3 AVIONICS CB PANEL L AOA CUR SENSE - VAR FREQ AC CB PANEL LDG GEAR HRN E5 LEFT DC CB PANEL R AOA CUR SENSE - VAR FREQ AC CB PANEL RAD ALT 1 F10 LEFT DC CB PANEL RUD SPEED IND D5 LEFT DC CB PANEL SW/SP COMP 1 K1 AVIONICS CB PANEL SW/SP COMP 1 H10 LEFT DC CB PANEL SW/SP COMP 2 K2 AVIONICS CB PANEL SW/SP COMP 2 F6 RIGHT DC CB PANEL TAKE OFF WRN HORN A4 LEFT DC CB PANEL TCAS A3 AVIONICS CB PANEL Circuit breakers and locations


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NON-NORMAL INDICATIONS AND OPERATION

Engine driven generator

If a malfunction should occur to a DC generator, the GCU will shut the generator down. However, the bus voltage will not be affected, as the operating generator will now supply power to both buses as the main bus tie contactor closes. If a generator trips off line, it can be reset by selecting the generator control switch to OFF, then back to ON. When a generator is offline either by GCU action or its control switch, the associated #1 DC GEN or #2 DC GEN caution light illuminates. During flight a generator can overheat, which is indicated by the #1 DC GEN HOT or #2 DC GEN HOT caution light illuminating. The associated generator should be switched OFF until the caution light goes out. The generator can then be selected ON and caution light monitored. Transformer Rectifier Units (TRU’s)

If a TRU goes off line, its associated L TRU or R TRU caution light illuminates. If a TRU overheats, the associated L TRU HOT or R TRU HOT caution light illuminates. When the TRU cools below a predetermined value, the light goes out. 1Battery temperature

If the MAIN BAT HOT or AUX BAT HOT warning light illuminates, the associated battery has exceeded 65�C. The related battery switch should then be selected OFF. When the battery temperature decreases below 65�C, the respective light will go out. AC control

If a generator output exceeds 125 Volt AC, the generator will shutdown. The #1 AC GEN or #2 AC GEN caution light illuminates and the bus tie contactor closes to maintain 115 Volt AC to both variable frequency buses. An attempt may be made to reset the generator by selecting the switch to OFF then back to ON. If the caution light remains ON, the generator switch should be selected OFF. If the L AC BUS or R AC BUS caution light illuminates, due to an under voltage or bus short circuit, the GCU isolates the faulty bus from its generator. The GCU also inhibits the bus tie contactor and prevents it from closing, thereby isolating the faulty bus from the serviceable side. If the bus fault is subsequently cleared, the associated generator resumes power to the bus. Illumination of the #1 AC GEN HOT or #2 AC GEN HOT caution light indicates an overheated generator. The associated generator switch must be selected OFF until the light goes out. If the generator is re-selected ON and the caution light illuminates again, the generator should be selected OFF for the remainder of the flight.


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Inverter control

If a primary, auxiliary or secondary inverter fails, the paralleling control box disconnects the inverter and signals the warning control box to turn ON the appropriate PRI INV, AUX INV or SEC INV caution light. The two operating inverters maintain AC power. If a second inverter fails, the operating inverter maintains the AC power, however, the load must be carefully monitored. The switch of a failed inverter must be selected OFF. A bus fault or transformer failure, causes the L 26 AC or R 26 AC caution light to illuminate. The bus tie circuit breaker connecting the left and right 115 Volt AC buses, opens to isolate the faulty bus. The inverter(s) connected to the faulty bus may subsequently fail if the fault persists and should therefore be selected OFF or switched to the non-faulted side. If a bus fault occurs to the 115 Volt AC bus, and the bus tiebreaker opens, the associated 26 Volt AC transformer and its bus will also lose power. All services powered by these two buses will be lost. Warning lights

AUX BAT HOT

MAIN BAT HOT

Temperature of associated battery has exceeded 65�C.

Applicable ECL AUX BATTERY HOT or MAIN BATTERY HOT.

Remarks None Caution lights

#1 DC GEN #2 DC GEN

Applicable generator off line, or shutdown by the GCU due to generator malfunction.

Applicable ECL #1 DC GENERATOR or #2 DC GENERATOR FAILURE.

Remarks Main DC buses automatically tie.

#1 DC GEN HOT

#2 DC GEN HOT

Applicable generator overheated. Generator must be selected OFF.

Applicable ECL #1 DC GEN HOT or #2 DC GEN HOT.

Remarks Caution light will go out when generator cools. Reselect generator and reduce DC electrical load.


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L TRU R TRU

Applicable TRU off line, or failed.

Applicable ECL L TRU and/or R TRU FAILURE

Remarks Secondary DC buses tie in the event of a TRU failure. If a double TRU failure occurs secondary DC buses tie to main DC buses.

L TRU HOT

R TRU HOT

Applicable TRU overheated. TRU must be shut down by pulling L TRU or R TRU circuit breaker.

Applicable ECL L TRU HOT or R TRU HOT.

Remarks Left and right secondary buses automatically tie when TRU is shutdown. TRU may be reenergized when it has cooled and caution light goes out.

#1 AC GEN #2 AC GEN

Applicable AC variable frequency generator off line, or shut down by the GCU due to generator malfunction.

Applicable ECL AC #1/#2 generator failure.

Remarks Variable frequency buses automatically tie.

L AC BUS R AC BUS

Bus fault or short circuit. GCU isolates faulty bus.

Applicable ECL L AC BUS or R AC BUS FAILURE.

Remarks If an AC bus fails the associated TRU also fails.

#1 AC GEN

HOT #2 AC GEN

HOT AC generator overheated. Select generator OFF until it cools (caution light goes out).

Applicable ECL #1 AC GEN HOT or #2 AC GEN HOT.

Remarks Caution light will go out when generator cools. Reselect generator and reduce AC electrical load.

MAIN

BATTERY AUX

BATTERY Main battery or auxiliary battery switch selected OFF.

Applicable ECL AUX BATTERY or MAIN BATTERY ISOLATION.

Remarks Main battery is removed from main bus automatically if a right main bus fault occurs. Auxiliary battery is removed from main bus automatically if a left main bus fault occurs.


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DC BUS

BBPU has detected a bus fault on main DC buses and has inhibited the bus tie contactors from closing.

Applicable ECL DC BUS FAILURE.

Remarks BBPU inhibits buses from tying. If bus fault is still present after 7 seconds, BBPU isolates and shuts down affected DC generator and removes affected battery from faulty main bus. All services on affected left or right main DC buses are affected. Always report this failure to maintenance even when resetable.

PRI INV

SEC INV

AUX INV

Primary/secondary/auxiliary inverter inoperative. Other inverter(s) remain operative.

Applicable ECL PRI or SEC or AUX INVERTER FAILURE.

Remarks With two inverters operational: power is maintained to all fixed frequency AC buses. Select auxiliary inverter to failed side if appropriate. With only one inverter operational: power is maintained to all fixed frequency buses via bus tie circuit breaker. Sheds load where possible to minimize load on remaining inverter. With failure of primary or secondary inverter, auxiliary inverter automatically switches to failed side regardless of AUX INV switch position.

R 26 AC L 26 AC

Associated 26 Volt AC transformer failed. All 26 Volt AC services on related bus will be lost. Possible loss of electrical power at corresponding 115 Volt AC fixed frequency bus.

Applicable ECL L 26 AC BUS or R 26 AC BUS FAILURE.

Remarks None


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Dash8-200/300 - Electrical - SmartCockpit · Bus fault operation The bus bar protection unit provides the starter/generators and batteries with automatic ... Dash8-200/300 - Electrical