计数器（包括在线监视器）
The monitor and arrester are connected in series with the power grid to monitor the arrester‘s leakage current in real time and record the number of times the arrester operates. Based on changes in the leakage current, any abnormalities in the arrester’s operation can be promptly identified to prevent accidents and improve the reliability of the power system’s operation.
计数器是串联在避雷器低压侧用于记录避雷器动作次数的装置。其使用条件与所接避雷器相同。
