Electrical Limitations

  1. What is the electrical limit when on the ground?
    At any temperature, to keep T5 below idle limit of 660°C, set idle NG plus 15% then observe load-meter reading should be greater than 0.5 (100 Amp)

    To keep the generator cool, when the temperature is greater than 7°C, the maximum load-meter reading is 0.8
  2. What is the starter duty cycle limitations?
    25 seconds ON, 1 minute OFF, then

    25 seconds ON, 1 minute OFF, then

    25 seconds ON, followed by a 30 minute cooling period
  3. Which electrical services consumes the greatest amount of power?
    Anti-icing systems such as windshield heat and propeller de-ice consume the greatest amount of power.

    External lighting and cabin lighting are the next highest consumers.

    If optional air conditioning (cabin cooling) has been installed, ensure that the mode switch is in the FLIGHT position after both engines have been started. This will provide automatic load shedding of the air conditioner if one generator should subsequently go offline.
  4. Why is cross generator starting prohibited?
    CROSS GENERATOR STARTING IS DETRIMENTAL TO GENERATOR BRUSHES AND TO REVERSE CURRENT CUT-OUT OPERATION (WHICH MAY CAUSE EVENTUAL CONTACT WELDING).

    CROSS GENERATOR STARTING, THEREFORE, SHOULD BE AVOIDED WHENEVER POSSIBLE.


    CROSS GENERATOR STARTS ARE TO BE RECORDED IN THE AIRCRAFT LOGS.
Author
Blizz0585
ID
347642
Card Set
Electrical Limitations
Description
Limitations
Updated