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HF-3106直流系統接地故障測試儀

發布日期：2025-01-04
訪問次數：851
地址：上海寶山

HF-3106直流系統接地故障測試儀：用于在不斷電情況下查找發電廠、變電站直流系統接地點的准確位置。該儀器在原理上引入一種全新的探測方法----波形分析法，其主要特點和優點：檢測靈敏度高、排查系統分布電容能力強、不斷電查找、不影響系統正常運行、抗幹擾能力強、安全可靠等。

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HF-3106直流系統接地故障測試儀

一、産品介紹

HF-3106直流系統接地故障測試儀用于在不斷電情況下查找發電廠、變電站直流系統接地點的准確位置。該儀器在原理上引入一種全新的探測方法----波形分析法，其主要特點和優點：檢測靈敏度高、排查系統分布電容能力強、不斷電查找、不影響系統正常運行、抗幹擾能力強、安全可靠等。

波形分析法，就是利用在直流母線與地之間加入一種特定的周期性電壓信號，通過卡鉗式探頭探測各支路電流，分析、計算電流信號基波與諧波的相位及相位差，進而判斷是否存在接地故障及接地故障點。

本裝置由信號發生器、信號接收器和信號采集器（卡鉗）三部分組成。在查找直流系統故障時，三者須同時配合使用。

本信號發生器不采用傳統的LC或RC的振蕩電路，而采用全新的數字技術，因而具有信號穩定的特點。該信號發生器由單片機、A/D轉換電路、信號放大濾波電路、功率放大及隔直電路、輸出反饋及保護等部分組成，其實現原理圖如下：

二、技術指標

※ 信号发生器:

输出信号频率：2.5Hz±2%

信号空载输出电压：0~20V有效值

信号电压幅值误差：＜5%

输出口抗冲击能力：400V直流冲击

电源电压：AC220V±10%

电压频率：50Hz±5%

输入保险：2A

※ 信号接收器:

信号电流检测灵敏度：0.5mA

接收器显示：数字 0~19

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