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Application filed by Institutul PolitehnicfiledCriticalInstitutul Politehnic
Priority to RO133127ApriorityCriticalpatent/RO100334A2/en
Publication of RO100334A2publicationCriticalpatent/RO100334A2/en
The grounding detection apparatus (AIPP) in the average voltage electric current supply system with an insulated neutral wire, according to the invention, allows the tracking of five states for the network segment downstream of its mounting place. It is being mounting on each sub-station and can detect: the existence of a grounding; the phase the grounding has been performed at; the existence of an asymmetrical load; the existence of a considerable earth capacity change of a phase. The device is supplied from a homopolar sequence current filter and directly from the triphasic voltage system from the power transformer secondary from the substation.<IMAGE>
Electronic circuits for detecting the earthing system and for testing the efficiency of residual current circuit-breakers connected to phase, neutral and earth of electrical users