Patent ID: 6452769
Filing Date: 2002-09-17
Classification: H02H,H02J

Abstract:
An electric power distribution installation comprising:at least one main common bus bar; a plurality of first and second main transformers, each of the first main transformers being configured to step down a received power supply voltage at a corresponding primary winding thereof from an external power supply and to supply the stepped down power supply voltage to the main common bus bar and each of the second main transformers being configured to supply the stepped down power supply voltage on the main bus bar to a load; a plurality of power generators, each power generator being connected to the main common bus bar; a first grounding device including at least one grounding transformer connected to a secondary winding of the corresponding one of the first main transformers via the main common bus bar, a neutral point of the grounding transformer being grounded in a form of a predetermined low impedance grounding; and a second grounding device connected to each neutral point of the power generators to always ground each neutral point directly in a form of a predetermined high resistance grounding.