ELEC

Question 1

Describe the elements of the electrical system

Answer 1

28V DC L/R systems 2 24v 43AH Nicad BAT
Generators 28V 400amps max 600

EMER BAT, BUS, aviaonics BUS from the ember battery from theL bat Bus, 24V 5AH lead acid

115/26V AC at 400 Hz
powered from 2 DV inverters

Wild FREQ 115V AC, two AC gens on the prop gearbox/ ice

Question 2

GEN

Answer 2

GCU, protects DC, trips field if incorrect, start disc at 55% Ng, Gen over temp 150 C, trips field opens relay fire handle pulled, can be rest

V 27.5-29

Question 3

External Power Volt

Answer 3

Disconnect, 10, 7 start/ 31 overvoltage

Question 4

Buses shed during start

Answer 4

Main + Essential

Question 5

EMER PWR Light illuminates

Answer 5

Emer bat power drops below 24v

when the emer bus is not powered

Question 6

Inverters

Answer 6

FROG
powered from the main Bus
Flight data recorder
Radar stabilization
Overhead panel back lighting
GPWS
       DC to AC

Question 7

Differences

Answer 7

B model two identical inverters

Question 8

Start with Batt switches off not recommended

Answer 8

Fail fire test, Emergency bus unpowered

Question 9

Busses with battery power only

Answer 9

Essential and Emergency

Question 10

What bus is 28v powered

Answer 10

MUM

Main, Utility, Main start Bus

Question 11

Emergency Bat power

Answer 11

Left Bat off, right on, twist volt meter to emergency 24V

Question 12

Lost right Gen in flight

Answer 12

R gen light, Bus tie connect, Elec arrow on CWP, Master Caution

Question 13

External power relay

Bus tie relay

Answer 13

R PDU, L PDU

Question 14

Bat temp 71

Answer 14

Bat Hot light, elec up, master caution, also No bat start

Question 15

L/R Hot Bat Bus

Answer 15

Fire handle functions, HP, Bleed close, GEN Trips
AHRS back up power
Right side refueling panel (R)
Time clock
Battery Voltge
Engine fire extinguisher 
Lighting, dome, entrence, cargo (L)

Question 16

Emergency Bus

Answer 16

Bus tie connect functions (AUTO)
Engine fire detection
Tail pipe HOT LIGHT
WEU/ Audio system backup power
Emergency voltage indication
Emergency instrument lighting

Question 17

Utility Bus

Answer 17

NO see, pee tea

reading lights, lav lights, jug heater

Question 18

Emergency Avionics Bus

Answer 18

Standby Horizon

Comm 1 VHF

Question 19

Hydraulic Pump Control

Answer 19

L main bus, on shutdown