Electrical Flashcards
Main battery system
A vented, 24 volt direct current (DC), 17 AMP/HR sealed lead acid battery (SLAB battery) located in the nose compartment of the helicopter .
Normal operation
Means flight so GPU can not be an answer
What indicates 1% on a load meter?
Thickness of the line
Starter generator
30 VDC, 150 amperes (operated at 28 VDC, 105 amperes) generator.
How many buss bars are on the VFR and A+ configuration?
There is one main buss bar on the VFR and A+ configuration.
What is the difference between the main and starter generator?
Main - IFR
Starter - VFR and A+
Codes for BUSS bars on IFR
[5] ESS 1
=5= ESS 2
5 NON ESS
If the main generator fails will the STBY GEN charge the main battery.
Following a main generator failure, the STBY GEN will not maintain the charge of the main battery.
What is the function of the starter/generator in the VFR configuration aircraft.
cranks the engine during the start sequence, supplies DC power to electrical circuits, and maintains battery charge.
Prolonged operation of the standby generator while it is the primary power supply to the ESS 1 buss bar is prohibited at air speeds____________________________ ?
less than 50 knots
What measuring gauge is used to measure 1%?
The thickness of a secondary line on the load meter gauge.
How do you check the charge on the battery during normal operation?
Place Battery switch from BATT to OFF, Observer the effect on the generator load meter, A drop of 1% or more indicates the battery is still charging. ( a drop of less than 1% indicates that the battery is fully charged)
Following the main generator’s failure (MAIN GEN FAIL) what powers the ESS 2 buss bar?
The main battery powers the ESS 2 buss bar in the event of the main generator’s failure.
What indication on the load meter is used to indicate one percent?
the thickness of a secondary line
Which aircraft configuration uses a volt meter selector switch, during the electrical systems check?
Only the IFR configuration
