The shipboard ungrounded electrical distribution system has capacitive ground through system‐level capacitance. High‐resistance grounding (HRG) is recommended for systems where power interruption resulting from single line‐to‐ground fault tripping is detrimental to the process. IEC requirements for a ground detection system include a system‐level insulation monitoring system that goes beyond the requirements for a ground detection system. IEEE Standard 32 specifies standing time ratings for neutral grounding resistors (NGRs) with permissible temperature rises above 30◦C ambient. The maximum ground fault current allowed by the NGR must exceed the total capacitance to ground charging current of the system. Phaseback is used for voltage stabilizing ground reference (VSGR) by monitoring the voltage on each phase with respect to ground and electromagnetically reacting to any voltage imbalance in the system and then stabilizing the ground reference of the system.


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    Titel :

    Grounding, Insulation Monitoring Design, and Verification


    Beteiligte:


    Erscheinungsdatum :

    2018-04-05


    Format / Umfang :

    26 pages




    Medientyp :

    Aufsatz/Kapitel (Buch)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




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