Electrical Flashcards
(24 cards)
What type of an electrical system is the air
plane equipped with?
A 28V DC Electrical Power Generation and
Distribution System
If both generators are available, do they operate in a split bus mode or parallel mode?
Split Bus Mode
What does the white AVAIL light indicate?
GPU button is pushed out, a GPU is connected and voltage is set between
25V DC and 30V DC
Which light will illuminate when the GPU button is pushed in and providing power to the airplane?
green IN USE
If APU is started while the airplane is powered by the GPU, what will be
the source of electrical power for the airplane?
APU
What color is the battery voltage indication if battery is discharging?
Amber
What will the indication be on the electrical
synoptic page if the GPU is connected but is
not providing power to the airplane?
White GPU
Will the Ram Air Turbine (RAT) be continuously displayed on the electrical synoptic? If not, when will it be displayed?
No, when it is deployed and providing power
to the airplane
How can a pilot manually command the RAT
to deploy?
RP can pull the RAT manual deploy control
What are the main engine generators and
the APU generators rated at?
28V DC, 600 A maximum continuous output
What is the minimum GPU voltage required
to start charging the batteries?
28 V
What buses is the APU capable of supplying
power to on the ground if the APU is the only
source of electrical power?
All electrical loads, including the SHED BUSES and charging the batteries
What buses are the APU capable of supplying power to in flight?
All electrical loads, (except for the SHED BUSES) and charging the batteries
What buses does the RAT generator power?
EMER BUS 1, EMER BUS 2 and EMER BUS 3,
as well as providing battery charge current
When will the RAT automatically deploy?
During an electrical emergency
In flight, when will an electrical emergency
occur?
When the two main generators and the APU
generator are unavailable
How many main batteries are there? What are they rated for?
2, 24V DC 40 Ah NiCad batteries
If batteries are the only source of electrical power in flight, what buses will be powered and what CAS message will be displayed?
The EMER BUSES; The red BATT DISCHARGING CAS message
In an electrical emergency, what buses are powered/isolated from the aircraft electrical system?
EMER BUS 1, EMER BUS 2 and EMER BUS 3
In an electrical emergency, what sources of power can provide electrical power to EMER
BUS 1, EMER BUS 2 and EMER BUS 3?
BATT 1, BATT 2 or the RAT
What buses will be energized when the air
plane is de-energized and there is no electrical power source available?
HOT BATT BUS 1 and HOT BATT BUS 2
For ground servicing, when a GPU is connected and providing power to the airplane, with the GPU button pushed out and the BATT 1 and BATT 2 switches in the OFF position, which bus is energized by the GPU?
SHED BUS 1
Which battery is connected to the APU
START BUS to assist with an APU start?
BATT 2
How many generators need to be operating
in order for the SHED BUSES to be energized in flight?
Two
