LIGHTNING ARRESTER FAILURE DETERMINATION METHOD AND LIGHTNING ARRESTER FAILURE DETERMINATION APPARATUS

To provide a lightning arrester failure determination method and a lightning arrester failure determination apparatus that are highly accurate based on a stable determination criterion.SOLUTION: A failure determination method for determining whether a lightning arrester in which lightning arrester elements are connected in series is a normal product or a defective product, includes: a reference value calculation process for seeking a frequency characteristic of equivalent series resistance of the lightning arrester from a theoretical formula expressing an equivalent circuit of the lighting arrester apparatus and for using it as a reference value; a target value measurement process for measuring the frequency characteristic of the equivalent series resistance of the lightning arrester that is a determination target and for using it as a target value; a comparison process for comparing the reference value with the target value; and a determination process for determining, as a result of the comparison, that the target lightning arrester is a defective product when a difference between the reference value and the target value exceeds a threshold.SELECTED DRAWING: Figure 7 【課題】安定した判定基準に基づく精度の高い避雷装置の故障判定方法および避雷装置の故障判定装置を提供する。【解決手段】避雷素子を直列接続した避雷装置について正常品であるか故障品であるかを判定する故障判定方法であって、避雷装置の等価回路を表す理論式から避雷装置の等価直列抵抗の周波数特性を求めて基準値とする基準値算出過程と、判定対象である対象避雷装置の等価直列抵抗の周波数特性を測定して対象値とする対象値測定過程と、基準値と対象値とを比較する比較過程と、比較の結果、基準値と対象値の差異が閾値を超えた場合に対象避雷装置を故障品と判定する判定過程を備える。【選択図】図７