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发明公开
CN105353194A 三相中性点不接地系统的电压采样装置 有权 转让

三相中性点不接地系统的电压采样装置
摘要：
本发明涉及一种三相中性点不接地系统的电压采样装置，包括第一电阻、第二电阻、第三电阻、第一电流电压转换器、第二电流电压转换器和第三电流电压转换器，第一电流电压转换器、第二电流电压转换器和第三电流电压转换器设有正相输入端、反相输入端和信号输出端；第一电阻、第二电阻和第三电阻一端分别连第一电流电压转换器、第二电流电压转换器、第三电流电压转换器的正相输入端，另一端分别连第一相电压互感器二次侧、第二相电压互感器二次侧、第三相电压互感器二次侧的输出测量端，第一电流电压转换器、第二电流电压转换器和第三电流电压转换器的反相输入端连接构成重构中性点，各信号输出端连接电压检测设备。可提高电压测量准确度。
摘要（英）：

The invention discloses a voltage sampling device of a three phase neutral point non-grounding system, comprising a first resistor, a second resistor, a third resistor, a first current-voltage transformer, a second current voltage converter and a third current-voltage converter; the first current-voltage converter, the second current-voltage converter and the third current-voltage converter are provided with a positive phase input terminal, an inverted input terminal and a signal output terminal; terminals of the first resistor, the second resistor and the third resistor are connected to positive phase input terminals of the first current-voltage converter, the second current-voltage converter and the third current-voltage converter; the other terminals of the first resistor, the second resistor and the third resistor are connected to output measurement terminals of the secondary sides of a first phase voltage mutual inductor, a second phase voltage mutual inductor and a third phase voltage mutual inductor; and the inverted input terminals of the first current-voltage converter, the second current-voltage converter and the third current-voltage converter are connected to constitute a reconstruction neutral point; and the output terminals of various signals are connected to a voltage detection device. The voltage sampling device of three phase isolated neutral system can improve the voltage measurement accuracy.

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