Through the monitoring on the frequency performance and square - wave response performance of manganese - zinc ferrite coil with different sizes . , different ratios of winding and different matching impedances , the result shows that manganese - zinc ferrite coil with proper ratio of winding and matching impedance can effectively restrain the interference and damage which the over - voltage and large - current signals of the power system do to the on - line monitoring system 通過對不同尺寸、不同匝數(shù)比和不同匹配阻抗下的錳鋅鐵氧體線圈的頻帶性能、方波響應性能測試實驗,結(jié)果表明:適當匝數(shù)比和匹配阻抗的錳鋅鐵氧體線圈可以有效地抑制系統(tǒng)過電壓和大電流信號對在線監(jiān)測系統(tǒng)干擾和破壞。