| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lightning protection device and a distribution switchboard with a lightning protection function, wherein a ground fault interrupter can be operated with respect to electrical leaks due to insulation failure in an overvoltage protector. <P>SOLUTION: The lightning protection device is placed between a ground fault interrupter having an overcurrent protection function and a load. Overvoltage protectors of semiconductor elements independent from match poles are provided between the ground fault interrupter and ground and a gap type lightning arresting element common to the match poles is not placed. The distribution switchboard with: a lightning protection function includes a ground fault interrupter having an overcurrent protection function; and a lightning protection device placed between the ground fault interrupter and a load. The lightning protection device is provided with an overvoltage protectors of semiconductor elements, to each match pole independently arranged in between the ground under the condition that two or more gap type lightning arresting elements common to the match poles are not inserted. <P>COPYRIGHT: (C)2010,JPO&INPIT |
