Patent ID: 6525917
Filing Date: 2003-02-25
Classification: H02H

Abstract:
A power transforming system, which has an overhead transmission line and a transformer connected with said overhead transmission line by an electric power line, comprising:lightning arrester means for eliminating over voltage, which is established between said overhead transmission line and said transformer, and ground fault means for making a ground condition which is connected to said electric power line; and control means for detecting a thunderbolt arising in said overhead transmission line, wherein when said control means detects a thunderbolt, said control means commands said ground fault means to make a ground condition in said overhead transmission line in which said thunderbolt arose so that said ground fault means protects said lightning arrester means from said thunderbolt; further including circuit breaker means for breaking electric power, which is established between said overhead transmission line and said transformer, and said control means further commands said circuit breaker means to break electric power, after said ground fault means is operated.