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  • 1.
    Medhammar, Manfred
    Linnaeus University, Faculty of Technology, Kalmar Maritime Academy.
    Parallelldrift av generatorer: Att skapa ett förslag till M/S Solsund2020Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The project has been commissioned by Ölandsfärjan AB, to investigate the possibilities of paralleloperation of the auxiliary engines onboard the companies' vessel M/S Solsund. A draft over theinstallation was made after the requirements given by the projects directives. The requirements in thedirectives was as following: The installation should comply with the prevailing regulations for thistype of installation and the electrical schematics designed to comply with the IEC standard.A background check was done before the commission started. In combination of inspections on boardto get the information about the condition and the physical layout of the components onboard,electrical drawings made in earlier project at Kalmar maritime academy was used to examine theship's main switchboard. To gain knowledge of how the owner operates the ship and to get ideas forthe installation, a demonstration was given by the owner. An important variable to this project was todetermine which regulations applied to this kind of ship. The investigation concluded that the shipsinstallation should follow classification company Germanischer Lloyd regulations for electricalinstallations.After evaluating the current installation and regulations, the conclusion was, that modification ofexisting installation was needed to fulfill the requirements of the project directives. The suggestedproduct to be manufactured was a new monitoring cabinet existing of new protection relays, howwould replace both the old protections in previous cabinet and adds supplemented protections neededfor this kind of installation. Components to be installed in the new suggestion are following: Autosynchronizer, Load sharer relay with included unloading and a reverse power protection.Synchroscope used when manually synchronize the auxiliary engines, and three protection relays; one3 phase over current and short circuit relay, one voltage relay (over and under) and at last one powerrelay for the bus bar used for tripping of non essential consumers.All constructed electrical drawings follows the IEC-standard and are intended to be used as a basis forthe installation. The drawings that were constructed are the following: - Layout diagram of the mainswitchboard and the new monitoring cabinet. - Circuit diagrams for both generators included themonitoring cabinets, and a part list over the components in the electrical schemes. All drawings wereconstructed in the computer program Easy EL.

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