FAULT DISPLAY UNIT FOR LIGHTNING ARRESTING DEVICE FOR POWER TRANSMISSION, AND LIGHTNING PROTECTION DEVICE FOR POWER TRANSMISSION

摘要

PROBLEM TO BE SOLVED: To obtain a fault display unit which is easy to maintain, easily made free from scattering of broken pieces when displaying the fault, and usable for various types of lightning protection devices for power transmission.;SOLUTION: An informing part 25A which discolors upon sensing the temperature rise of a nonlinear resistor element 15e is disposed at the outer periphery of the nonlinear resistor element 15e electrically connected to electrodes 10A and 10B of the lightning protection device 50A for power transmission to determine the fault state of the lightning arresting device 50A for power transmission according to whether the temperature of the nonlinear resistor element 15e rises and then whether the informing part discolors without using a detection coil nor a fuse for detecting a fault current.;COPYRIGHT: (C)2010,JPO&INPIT