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Initial Pilot Ground School

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1 Initial Pilot Ground School
EC 130 B4 Initial Pilot Ground School Chapter 7 Electrical System

2 Chapter 7 - Electrical System
DC Power Supply System - General Operation ……………………..… 7.3 EC130 B4 Electrical System Schematic …..……………….……..…….. 7.4 Summary of the Three Power Supplies …….………………………...… 7.5 Electrical System Component Location ……...……………......………. 7.6 Pilot’s View of the Electrical System ………...…………………………. 7.7 Master Switch / Remaining Equipment ….…..………………………….. 7.8 Vehicle and Engine Multifunction Display ………...…………………… 7.9 Electrical Master Box …………………………...…………………………. 7.10 Power Distribution ………………..…….…………………………..……… 7.11 Direct Battery Power …………………...………………………………… Direct Battery Switch - Light Logic ….………………………………… Electrical System Limitations…..………………………………………… 7.14 Smoke in the Cockpit / Cargo - Source Not Identified ……… & 7.23 Smoke in the Cockpit / Cargo - Source Identified …………………… Battery Temperature Warning Light …………………………………… Battery Caution Light ……………………………………………………… 7.41 Generator Caution Light …...…………………...………………… 7.54 & 7.55 Review Questions ………………………………………………………… 7.2

3 General Operation Power Sources Coupling 7.3 ELECTRICAL SYSTEM
MAIN SOURCES OF POWER GENERATOR BATTERY GROUND POWER DISTRIBUTION / CONTROL Power Sources Coupling 7.3

4 EC 130 B4 Electrical System EXT PWR BATTERY 24 - 28 VOLT BUS Starter
RELAY FUSE PANEL BATTERY VOLT BUS CONTACTOR SWITCH IGNITER IGNITERS CRANK AND SWITCH Starter Generator REVERSE CURRENT PROTECTION NORMAL VOLTAGE REGULATOR NOR MAL HIGH VOLTAGE SHUTDOWN ELECTRICAL CONSUMERS EC 130 B4 Electrical System VOLTS VEMD AMPS WRONG WAY STARTER GENERATOR GEN RESET SWITCH OVER VOLTAGE PROTECTION RE-EXCITES THE GENERATOR WHICH CLOSES THE GENERATOR CONTACTOR GENERATOR FIELD RESET RELAY RESETS DIRECT 7.4

5 A summary of the three DC power supply conditions:
External Power Battery Power Generator Power 7.5

6 Electrical System Component Location
Starter / Generator Electrical Master Box EPU Outlet Battery 7.6

7 Pilot’s view of the Electrical System
BATT GENE BATTTEMP EXT PWR BATT. GENE GENE RESET CRANK DIRECT BATT. MASTER SW 7.7

8 Emergency Cut-Off Load Shed Switch
MASTER SW Emergency Cut-Off Load Shed Switch Remaining Functioning Equipment: Transponder NR / NF Indicator Instrument lights Overhead Dome & Map Lights ICS (depending upon avionics set-up) Floats (if installed) Other items as customized Note: Starting is inhibited when the MASTER SW is depressed to the “ON” position. 7.8

9 Vehicle and Engine Multifunction Display
The V.E.M.D. displays the priority aircraft voltage and amperage. 7.9

10 Electrical Master Box K4 K3 K5 K6 K7 Fuses K1 is Gen. relay
K2 is EPU relay K3 - K7 relays: Starter, Generator, Battery, EPU, Fan K3 K5 K6 K7 Voltage Regulation PCB 100 amp Fuse Overvoltage PCB 7.10

11 Power Distribution 7.11

12 Direct Battery Power 16 ALPHA DIRECT BATT. DIRECT BATTERY POWER Remaining Transponder Overhead Dome & Map Lights Equipment: NR / NF Indicator ICS (depending upon avionics set-up) Instrument lights Floats (if installed) Other items as customized 7.12

13 Direct Battery Switch - Light Logic
The DIRECT BATTERY pushbutton brings power to certain components directly from the battery. The Direct Battery pushbutton MUST be depressed to the “ON” position to activate the Transponder and Nf indicator. Normally, both the EXT PWR / BAT and the DIRECT BATTERY pushbuttons are engaged. When both are engaged, the DIRECT BATTERY pushbutton will not be illuminated. If only the DIRECT BATTERY pushbutton is depressed to the “ON” position, then the lights are illuminated. DIRECT BATT. DIRECT BATT. 7.13

14 Electrical System Limitations
Maximum Voltage....… 31.5 Volts Rated Voltage Range..… Volts Current....…. 150 Amps (Optional …… 200 Amps) Flight Manual - Limitations Section - Page 2 - 9 7.14

15 3.4 SMOKE IN THE COCKPIT / CARGO 3.4.1 SOURCE NOT IDENTIFIED
Heating, Demisting ….. OFF smoke clears YES Flight Manual - Emergency Procedures - Page 3-6 7.15

16 3.4 SMOKE IN THE COCKPIT / CARGO 3.4.1 SOURCE NOT IDENTIFIED
Heating, Demisting ….. OFF smoke clears YES CONTINUE FLIGHT depending on weather conditions Flight Manual - Emergency Procedures - Page 3-6 7.16

17 3.4 SMOKE IN THE COCKPIT / CARGO 3.4.1 SOURCE NOT IDENTIFIED
Heating, Demisting ….. OFF smoke clears YES NO CONTINUE FLIGHT depending on weather conditions Flight Manual - Emergency Procedures - Page 3-6 7.17

18 3.4 SMOKE IN THE COCKPIT / CARGO 3.4.1 SOURCE NOT IDENTIFIED
Heating, Demisting ….. OFF smoke clears YES NO 1. Master Switch …….. DEPRESSED 2. DIRECT BATT. ……. OFF 3. EXT PWR BATT OFF 4. GEN ………….…….. OFF 5. MASTER AVIONIC ...OFF 6. Ventilate the cabin. When smoke clears: 1. All Consumers …….. OFF 2. MASTER SWITCH …ON 3. EXT PWR BATT.……ON check DC parameters 4. DIRECT BATT..……. ON check DC parameters 5. GEN ………………… ON check DC parameters CONTINUE FLIGHT depending on weather conditions Flight Manual - Emergency Procedures - Page 3-6 7.18

19 3.4 SMOKE IN THE COCKPIT / CARGO 3.4.1 SOURCE NOT IDENTIFIED
Heating, Demisting ….. OFF smoke clears YES NO 1. Master Switch …….. DEPRESSED 2. DIRECT BATT. ……. OFF 3. EXT PWR BATT OFF 4. GEN ………….…….. OFF 5. MASTER AVIONIC ...OFF 6. Ventilate the cabin. When smoke clears: 1. All Consumers …….. OFF 2. MASTER SWITCH …ON 3. EXT PWR BATT.……ON check DC parameters 4. DIRECT BATT..……. ON check DC parameters 5. GEN ………………… ON check DC parameters CONTINUE FLIGHT depending on weather conditions If DC parameters not correct: (Continued Flight Manual - Emergency Procedures - Page 3-6 7.19

20 3.4 SMOKE IN THE COCKPIT / CARGO 3.4.1 SOURCE NOT IDENTIFIED
5. GEN ……….. ON check DC parameters If DC parameters not correct : 6. GEN ………….. OFF 7. Unnecessary equipment …… OFF Flight Manual - Emergency Procedures - Page 3-6 7.20

21 3.4 SMOKE IN THE COCKPIT / CARGO 3.4.1 SOURCE NOT IDENTIFIED
5. GEN ……….. ON check DC parameters If DC parameters not correct : 6. GEN ………….. OFF 7. Unnecessary equipment …… OFF LAND AS SOON AS PRACTICABLE Flight Manual - Emergency Procedures - Page 3-6 7.21

22 3.4 SMOKE IN THE COCKPIT / CARGO 3.4.1 SOURCE NOT IDENTIFIED
5. GEN ……….. ON check DC parameters If DC parameters not correct : 6. GEN ………….. OFF 7. Unnecessary equipment …… OFF LAND AS SOON AS PRACTICABLE If DC parameters correct & no smoke detected : 6. MASTER AVIONIC ……….. ON 7. All consumers ……………… ON, one by one to identify the failed system; then keep it off. Flight Manual - Emergency Procedures - Page 3-6 7.22

23 3.4 SMOKE IN THE COCKPIT / CARGO 3.4.1 SOURCE NOT IDENTIFIED
5. GEN ……….. ON check DC parameters If DC parameters not correct : 6. GEN ………….. OFF 7. Unnecessary equipment …… OFF LAND AS SOON AS PRACTICABLE If DC parameters correct & no smoke detected : 6. MASTER AVIONIC ……….. ON 7. All consumers ……………… ON, one by one to identify the failed system; then keep it off. CAUTION When battery and generator are off line, the VEMD goes out and only the [ analog* ] NR gauge remains. Apply both screen failure procedure. (§ VEMD SCREEN FAILURE SECTION 3). * [ As the phonic wheel passes by the sensor an electrical charge is generated which illuminates the NR LEDs. ] Flight Manual - Emergency Procedures - Page 3-6 7.23

24 3.4 SMOKE IN THE COCKPIT / CARGO 3.4.2 SOURCE IDENTIFIED
1. Corresponding system ………. OFF 2. Ventilate the cabin Flight Manual - Emergency Procedures - Page 3-6 7.24

25 depending on system failed.
3.4 SMOKE IN THE COCKPIT / CARGO SOURCE IDENTIFIED 1. Corresponding system ………. OFF 2. Ventilate the cabin CONTINUE FLIGHT depending on system failed. Flight Manual - Emergency Procedures - Page 3-6 7.25

26 depending on system failed.
3.4 SMOKE IN THE COCKPIT / CARGO SOURCE IDENTIFIED 1. Corresponding system ………. OFF 2. Ventilate the cabin CONTINUE FLIGHT depending on system failed. NOTE After DC had been switched-off and on in flight, light will remain on until the next normal full engine and battery switch-off on the ground. GOV Flight Manual - Emergency Procedures - Page 3-6 7.26

27 Maximum battery temperature.
WARNING PANEL CORRECTIVE ACTIONS BATTTEMP Maximum battery temperature. Flight Manual - Emergency Procedures - Page 3-16 7.27

28 Maximum battery temperature.
WARNING PANEL CORRECTIVE ACTIONS 1. EXT PWR BATT ………………..…OFF BATTTEMP Maximum battery temperature. Flight Manual - Emergency Procedures - Page 3-16 7.28

29 Maximum battery temperature.
WARNING PANEL CORRECTIVE ACTIONS 1. EXT PWR BATT ………………..…OFF 2. U bus voltage ………...…………. CHECK BATTTEMP Maximum battery temperature. Flight Manual - Emergency Procedures - Page 3-16 7.29

30 Maximum battery temperature.
WARNING PANEL CORRECTIVE ACTIONS 1. EXT PWR BATT ………………..…OFF 2. U bus voltage ………...…………. CHECK BATTTEMP Maximum battery temperature. NORMAL Flight Manual - Emergency Procedures - Page 3-16 7.30

31 Maximum battery temperature.
WARNING PANEL CORRECTIVE ACTIONS 1. EXT PWR BATT ………………..…OFF 2. U bus voltage ………...…………. CHECK BATTTEMP Maximum battery temperature. NORMAL LAND AS SOON AS PRACTICABLE Flight Manual - Emergency Procedures - Page 3-16 7.31

32 Maximum battery temperature.
WARNING PANEL CORRECTIVE ACTIONS 1. EXT PWR BATT ………………..…OFF 2. U bus voltage ………...…………. CHECK BATTTEMP Maximum battery temperature. NORMAL ABOVE U max 1. EXT PWR BATT ... ON 2. GEN..…OFF 3. Unnecessary equipment… OFF LAND AS SOON AS PRACTICABLE Flight Manual - Emergency Procedures - Page 3-16 7.32

33 BATT Battery off line CORRECTIVE ACTIONS WARNING PANEL
Flight Manual - Emergency Procedures - Page 3-16 7.33

34 1. EXT PWR BATT ……………... CHECK ON
WARNING PANEL CORRECTIVE ACTIONS 1. EXT PWR BATT ……………... CHECK ON BATT Battery off line Flight Manual - Emergency Procedures - Page 3-16 7.34

35 1. EXT PWR BATT ……………... CHECK ON
WARNING PANEL CORRECTIVE ACTIONS 1. EXT PWR BATT ……………... CHECK ON BATT YES Battery off line Flight Manual - Emergency Procedures - Page 3-16 7.35

36 1. EXT PWR BATT ……………... CHECK ON
WARNING PANEL CORRECTIVE ACTIONS 1. EXT PWR BATT ……………... CHECK ON BATT YES Battery off line CHECK voltage on VEMD Flight Manual - Emergency Procedures - Page 3-16 7.36

37 BATT 1. EXT PWR BATT ……………... CHECK ON YES Battery off line
WARNING PANEL CORRECTIVE ACTIONS 1. EXT PWR BATT ……………... CHECK ON BATT YES Battery off line CHECK voltage on VEMD LAND AS SOON AS PRACTICABLE [ Use caution to NOT turn off GEN Switch or all power will be lost and not retrievable. ] Flight Manual - Emergency Procedures - Page 3-16 7.37

38 BATT 1. EXT PWR BATT ……………... CHECK ON YES NO Battery off line
WARNING PANEL CORRECTIVE ACTIONS 1. EXT PWR BATT ……………... CHECK ON BATT YES NO Battery off line CHECK voltage on VEMD LAND AS SOON AS PRACTICABLE [ Use caution to NOT turn off GEN Switch or all power will be lost and not retrievable. ] Flight Manual - Emergency Procedures - Page 3-16 7.38

39 BATT 1. EXT PWR BATT ……………... CHECK ON NO EXT PWR BATT …..... ON YES
WARNING PANEL CORRECTIVE ACTIONS 1. EXT PWR BATT ……………... CHECK ON BATT NO EXT PWR BATT …..... ON YES Battery off line CHECK voltage on VEMD LAND AS SOON AS PRACTICABLE [ Use caution to NOT turn off GEN Switch or all power will be lost and not retrievable. ] Flight Manual - Emergency Procedures - Page 3-16 7.39

40 BATT BATT 1. EXT PWR BATT ……………... CHECK ON NO EXT PWR BATT …..... ON
WARNING PANEL CORRECTIVE ACTIONS 1. EXT PWR BATT ……………... CHECK ON BATT NO EXT PWR BATT …..... ON YES Battery off line CHECK voltage on VEMD BATT LAND AS SOON AS PRACTICABLE Goes out [ Use caution to NOT turn off GEN Switch or all power will be lost and not retrievable. ] Flight Manual - Emergency Procedures - Page 3-16 7.40

41 BATT BATT 1. EXT PWR BATT ……………... CHECK ON NO EXT PWR BATT …..... ON
WARNING PANEL CORRECTIVE ACTIONS 1. EXT PWR BATT ……………... CHECK ON BATT NO EXT PWR BATT …..... ON YES Battery off line CHECK voltage on VEMD BATT LAND AS SOON AS PRACTICABLE Goes out CONTINUE FLIGHT [ Use caution to NOT turn off GEN Switch or all power will be lost and not retrievable. ] Flight Manual - Emergency Procedures - Page 3-16 7.41

42 GENE DC Generator off line CORRECTIVE ACTIONS WARNING PANEL
Flight Manual - Emergency Procedures - Page 3-17 7.42

43 GENE 1. U bus on VEMD ……..CHECK DC Generator off line
WARNING PANEL CORRECTIVE ACTIONS 1. U bus on VEMD ……..CHECK GENE DC Generator off line Flight Manual - Emergency Procedures - Page 3-17 7.43

44 GENE 1. U bus on VEMD ……..CHECK 2. GEN ………………...…CHECK ON DC Generator
WARNING PANEL CORRECTIVE ACTIONS 1. U bus on VEMD ……..CHECK 2. GEN ………………...…CHECK ON GENE DC Generator off line Flight Manual - Emergency Procedures - Page 3-17 7.44

45 GENE 1. U bus on VEMD ……..CHECK 2. GEN ………………...…CHECK ON NO
WARNING PANEL CORRECTIVE ACTIONS 1. U bus on VEMD ……..CHECK 2. GEN ………………...…CHECK ON GENE NO DC Generator off line Flight Manual - Emergency Procedures - Page 3-17 7.45

46 GENE 1. U bus on VEMD ……..CHECK 2. GEN ………………...…CHECK ON NO
WARNING PANEL CORRECTIVE ACTIONS 1. U bus on VEMD ……..CHECK 2. GEN ………………...…CHECK ON GENE NO DC Generator off line GEN …………… ON Flight Manual - Emergency Procedures - Page 3-17 7.46

47 GENE 1. U bus on VEMD ……..CHECK 2. GEN ………………...…CHECK ON NO
WARNING PANEL CORRECTIVE ACTIONS 1. U bus on VEMD ……..CHECK 2. GEN ………………...…CHECK ON GENE NO DC Generator off line GEN …………… ON Flight Manual - Emergency Procedures - Page 3-17 7.47

48 GENE 1. U bus on VEMD ……..CHECK 2. GEN ………………...…CHECK ON NO YES
WARNING PANEL CORRECTIVE ACTIONS 1. U bus on VEMD ……..CHECK 2. GEN ………………...…CHECK ON GENE DC Generator off line YES NO GEN …………… ON Flight Manual - Emergency Procedures - Page 3-17 7.48

49 GENE 1. U bus on VEMD ……..CHECK 2. GEN ………………...…CHECK ON NO YES
WARNING PANEL CORRECTIVE ACTIONS 1. U bus on VEMD ……..CHECK 2. GEN ………………...…CHECK ON GENE YES NO DC Generator off line GEN …………… ON GENE RESET ....ON Flight Manual - Emergency Procedures - Page 3-17 7.49

50 GENE GENE 1. U bus on VEMD ……..CHECK 2. GEN ………………...…CHECK ON NO YES
WARNING PANEL CORRECTIVE ACTIONS 1. U bus on VEMD ……..CHECK 2. GEN ………………...…CHECK ON GENE DC Generator off line YES NO GEN …………… ON GENE RESET ....ON GENE Goes out Flight Manual - Emergency Procedures - Page 3-17 7.50

51 GENE GENE 1. U bus on VEMD ……..CHECK 2. GEN ………………...…CHECK ON NO YES
WARNING PANEL CORRECTIVE ACTIONS 1. U bus on VEMD ……..CHECK 2. GEN ………………...…CHECK ON GENE DC Generator off line YES NO GEN …………… ON GENE RESET ....ON GENE Goes out CONTINUE FLIGHT Flight Manual - Emergency Procedures - Page 3-17 7.51

52 GENE GENE GENE 1. U bus on VEMD ……..CHECK 2. GEN ………………...…CHECK ON NO
WARNING PANEL CORRECTIVE ACTIONS 1. U bus on VEMD ……..CHECK 2. GEN ………………...…CHECK ON GENE DC Generator off line YES NO GEN …………… ON GENE RESET ....ON GENE GENE Goes out Remains on CONTINUE FLIGHT Flight Manual - Emergency Procedures - Page 3-17 7.52

53 GENE GENE GENE 1. U bus on VEMD ……..CHECK 2. GEN ………………...…CHECK ON NO
WARNING PANEL CORRECTIVE ACTIONS 1. U bus on VEMD ……..CHECK 2. GEN ………………...…CHECK ON GENE YES NO DC Generator off line GEN …………… ON GENE RESET ....ON GENE GENE Goes out Remains on CONTINUE FLIGHT Unnecessary equipment .. OFF Flight Manual - Emergency Procedures - Page 3-17 7.53

54 LAND AS SOON AS PRACTICABLE
WARNING PANEL CORRECTIVE ACTIONS 1. U bus on VEMD ……..CHECK 2. GEN ………………...…CHECK ON GENE DC Generator off line YES NO GEN …………… ON GENE RESET ....ON GENE GENE Goes out Remains on CONTINUE FLIGHT Unnecessary equipment .. OFF LAND AS SOON AS PRACTICABLE (Continued Flight Manual - Emergency Procedures - Page 3-17 7.54

55 GENE GENE GENE Goes out Remains on DC Generator off line
WARNING PANEL CORRECTIVE ACTIONS GENE GENE GENE Goes out Remains on DC Generator off line CONTINUE FLIGHT Unnecessary equipment .. OFF LAND AS SOON AS PRACTICABLE CAUTION If the battery fails, the VEMD will go out and only the analog NR gauge will remain. Maximum flight time on battery: day: 50 minutes (1 VHF 1 VOR) night: 20 minutes (same as day plus instrument lighting and external lights). [ As the phonic wheel passes by the sensor an electrical charge is generated which illuminates the NR LEDs. ] Flight Manual - Emergency Procedures - Page 3-17 7.55

56 Review Questions 7.56

57 55. What are the basic components of the aircraft electrical system?
A. Battery, generator, EPU receptacle, fuses, and relays.

58 56. What caution / warning lights monitor the aircraft electrical system?
B. BATTTEMP GENE BATT

59 57. What items monitor the electrical system?
D. VEMD voltmeter and amp meter.

60 58. What pushbuttons / switches are used to engage (or disengage) electrical systems?
D. BAT switch, GEN switch, GEN RESET, DIRECT BATT, & MASTER SW.

61 59. Where is the electrical master box located?
C. Floor of aft cargo area.

62 60. What must the pilot press (or switch) on to energize the PP12 (distribution bus bar) by an EPU?
B. EXT PWR / BAT pushbutton.

63 61. What is the difference in switch usage when starting the helicopter using an EPU versus the battery? C. Only small children fall for this one as there is no difference at all.

64 62. What caution / warning lights will be illuminated for an EPU start as opposed
to a battery start? D. The BATT light will be illuminated.

65 63. When does the generator come on line?
C. When Generator voltage exceeds Battery voltage by .5 volts.

66 64. What does the U/BUS (Utilization Bus) on the VEMD display?
B. Battery or Generator voltage.

67 65. Will the helicopter start if the MASTER SW is depressed to the “ON” condition?
A. No

68 66. What electrical items will continue to operate if the MASTER SW is depressed to the “ON” condition? C. Transponder, NR / Nf, instrument lights, overhead dome & map lights, and in some aircraft, ICS and floats.

69 67. If you use an External Power Unit to start the EC130 B4 what are the recommended maximum voltage and amperage values (standard aircraft) ? D Volts and 150 Amps maximum

70 Initial Pilot Ground School
EC 130 B4 Initial Pilot Ground School End of Chapter 7 Electrical System

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