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三相電能表校驗儀誤差偏大原因及處理
點擊次數:2534 更新時間:2014-07-11

在校表時,如果校驗出來的誤差值偏大,有以下幾種可能原因:

1、接線錯誤,相電壓與相電流沒有一一對應,或者某相功率為

2、光電采樣器誤采樣(即多采樣或少采樣),此時需要重新調整光電采樣器的位置或靈敏度。

3、鉗形電流互感器鐵芯端面太臟造成的采樣電流偏小。

4、鉗形電流互感器鐵芯端面沒有*閉合。

5、被校表電表常數輸入錯誤。

6、被校計量裝置的變比輸入錯誤。

7、現場負荷波動太大。

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