Multiple dwelling house highway electric current control system

摘要

P To provide a system for controlling a trunk current of a condominium that improves user friendliness. PSOLUTION: A current level determining device 12 measures the duration of a state in which the ratio of a trunk current passed from a trunk current detector 11 to the rated current of a trunk breaker Ba is in an overcurrent range and starting when it is determined that a limit time has been reached. When the duration exceeds one minute, two minutes, and four minutes and a transmitter 13 is caused to transmit a transmission signal instructing to reduction a threshold by one step. Hence, when a current supplied to a specific load Ld is limited but a trunk current is not reduced out of the overcurrent range and the number of dwelling houses as the targets of current limitation is increased with the duration during which current limitation is carried out. Accordingly and it is possible to avoid limitation of current supply to the specific load Ld at more dwelling houses than necessary and suppress the interruption of the trunk breaker Ba. As a result and users' convenience is enhanced. PCOPYRIGHT: (C)2010 and JPO& INPIT