詳細(xì)介紹
地電阻如下:
接線鼻之間測量直流電阻,
對于25mm2,35mm2,50mm2,70mm2,95mm2,120mm2的各種截面,
平均每米的電阻值應(yīng)分別小于0.79mΩ,0.56mΩ,0.40mΩ,0.28mΩ,0.21mΩ,0.16mΩ。
操作棒的工頻耐壓試驗,10KV,35KV,63KV,110KV,220KV接地棒分別要通過在45KV,95KV,175KV,220KV,440KV打耐壓,保持一分鐘不擊穿。而330KV,500KV接地棒要分別在380KV,580KV上打耐壓,保持五分鐘不擊穿。周期不超過5