Electrical Flashcards
What effects can electrical shock have on the human body?
1) disrupts the body’s normal electrical functions
2) stops the heart
3) stops the lungs
4) causes severe injury or death
Types of voltage
AC
DC
Sources of AC power for the aircraft
1) external power
2) IDG 1
3) IDG 2
4) APU starter generator
Source of DC power for the aircraft
1) AC system
2) main battery
What is the unit of measurement for electrical current?
Amperes
What is resistance
Opposition to the flow of electricity
Define Ohm’s law
Current through a conductor between two points is directly proportional to the voltage and indirectly proportional to the resistance
Define frequency
Number of complete alternations per second of an AC circuit
What is an electrical bus?
Central point at which either AC or DC voltage is distributed
What is a circuit breaker
Overcurrent protection device (push-pull type)
What is the difference between a fuse and a circuit breaker?
Fuse is one time use only
What is a relay?
Electrically actuated switch used to control the distribution of electricity
What is the Output of the Integrated Drive Generator (IDG)?
115 Vac, 3 phase, 400 Hz
State the two batteries utilized on the aircraft
1) main battery
2) auxiliary battery
State the purpose of the Transformer Rectifier Unit (TRU’s)
Convert 115 Vac, 400 Hz to 28Vdc to provide Dc power
