2. Electrical

Question 1

How many Amps are the starter generators?

Answer 1

200A

Question 2

How is the battery connected to the main DC buses?

Answer 2

Connected to the left dc bus (both when bus tie is in normal position)

Question 3

What does the DC Voltmeter indicate?

Answer 3

Voltage present on left DC bus

Question 4

What does the DC loadmeter indicate?

Answer 4

Displays load on either left generator, right generator or battery.

Question 5

What is the function of the reverse current circuit breaker (RCCB)? Where is it located?

Answer 5

Disconnecting the main battery from the left DC bus if the sustained charging current ever exceeds 450 amps.
Located in the main cabin roof.

Question 6

How are the inverters powered?

Answer 6

NO 1 inverter receives DC power from the left DC bus, and NO 2 inverter receives power from the right DC bus.

Question 7

What is powered by the 115V AC BUS? (FAH)

Answer 7

1. Fuel Quantity Gauges
2. Attitude Indicator
3. HSI

Question 8

What is powered by the 26V AC BUS? (TOF)

Answer 8

1. Torque Gauges
2. Oil Pressure Gauges
3. Fuel Flow Gauges

Question 9

How are the generators brought online?

Answer 9

By pushing the GENERATOR switch from the OFF position momentarily forward to the RESET position

Question 10

What should be done if a significant electrical load is anticipated when the generators will be brought online?

Answer 10

Increase Ng to Idle Ng +15%

Question 11

For any abnormality, what is the maximum reset attempts for either generator?

Answer 11

2

Question 12

What are the dry motoring/ abnormal operation starter limitations?

Answer 12

25 seconds ON, 60 seconds OFF
25 seconds ON, 60 seconds OFF
25 seconds ON, 30 minutes OFF
(These limits do not apply to normal starts)

Question 13

How is the battery charged under normal conditions?

Answer 13

From either generator.

Question 14

Where is the main battery located?

Answer 14

Beneath the aft baggage compartment floor.

Question 15

For ground ops above 7deg C, the Gen loadmeter reading should be?

Answer 15

0.8 or less

Question 16

When used, the emergency lights receive power from?

Answer 16

Internal batteries

Question 17

Where are forward and aft bag area lights powered from?

Answer 17

The hot battery bus

Question 18

How many volts is the electrical system?

Answer 18

28V DC

Question 19

What are the primary and secondary sources of DC power?

Answer 19

Primary- 2 starter generators

Secondary- 24V DC battery

Question 20

How is the scale of the loadmeter graduated?

Answer 20

Positive and negative units of 0.1, from -1.0 to +1.0.
BAT position, 0.1. equals 10 amps.
L GEN or R GEN position, 0.1 equals 20 amps.