A method for sectioning a medium-voltage distribution electric line evidencing a disturbance using a section switch. The steps are: (a) detecting a current having an amplitude and a wave form profile in the medium-voltage line; (b) analyzing the wave form profile to determine whether the fault is transient,...http://www.google.com.hk/patents/US8125751?utm_source=gb-gplus-share專利 US8125751 - Method for sectioning with a section switch a medium-voltage electric power distribution line exhibiting a disturbance, section switch for medium-voltage electric power distribution line applicable thereon and electronic circuit for detecting a fault current and comprised by said section switch
