UNINTERRUTIBLE SELECTIVE CIRCUIT BREAKER IN PRIVATE GENERATING EQUIPMENT PROVIDED IN PARALLEL WITH COMMERCIAL DISTRIBUTION LINE

摘要

PURPOSE: To facilitate the supply of a stable voltage to a selective load on a private generating equipment side at the time of selective circuit breaking caused by the service interruption of the system power supply, etc. CONSTITUTION: System side premises distribution lines (a) and private generation lines (b) are linked with each other with thyristor switches 1. The value of a power which is supplied from the private generation side to the distribution lines (a) is calculated and a reverse current detector 4 by which the calculated power value is compared with a reference power set value is provided. The thyristor switches 1 are instantaneously cut-off by the output signal of the reverse current detector 4.