The electric power system for the Boeing 777 is comprised of two independent electrical systems, the main and the backup. The main electric system includes two engine-driven integrated drive generators, a generator driven by the auxiliary power unit, three generator control units, and a bus power control unit. The backup electric system includes two engine-drive generators and one integrated converter/control unit to provide the redundancy of electrical sources equivalent to a three-engine airplane. Automation of the system is achieved by the use of state-of-the-art, microprocessor-based control units that perform system control, protection, and built-in-test functions. Each control unit has redundant two-way communication through an ARINC 629 communication bus that requires significantly fewer discrete wires than similar systems, allowing considerable reduction of the interface circuits and reduction in weight.


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    Title :

    Design of Boeing 777 electric system


    Additional title:

    Entwurf des elektrischen Systems der Boeing 777


    Contributors:
    Andrade, L. (author) / Tenning, C. (author)


    Publication date :

    1992


    Size :

    8 Seiten




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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