Lightning arrester on tower for power transmission

摘要

Disclosed is a lightning arrester provided for a power transmission line so as to prevent damage to a line-supporting insulator string due to lightning stroke. A lightning arrester unit (10) is fixedly supported on a fitting (8) fixed to an arm structure (4) of a tower in a relation in which its grounded side is electrically insulated from the fitting (8), and an operation detection device (6) is connected between the grounded side of the lightning arrester unit (10) and the fitting (8). The operation detection device (6) is in the form of an operation indicator (6A, 6B, 6D, 6F), a flashover indicator (6C) and/or an operation recorder (6E). In the event of impartation of a lightning stroke, the operation detection device (6) detects lightning current flowing from the grounded side of the lightning arrester unit (10) toward the fitting (8).