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发明公开
CN105334370A 电网电压检测电路 无效 - 驳回

电网电压检测电路
摘要：
本发明提供电网电压检测电路，包括：差分电压检测电路和星形电路；所述差分采样检测电路与所述星形电路电连接。本发明将以往常用的电压互感器采样电路改为差分采样电路，降低了成本；增加由贴片电阻组成的星形回路，使电路更加可靠灵活，同时适用于三相三线制与三相四线制的电网相电压采样，统一了程序对电网电压的处理，同时增加了产品可靠性。
摘要（英）：

The invention provides a power grid voltage detection circuit. The power grid voltage detection circuit includes a difference voltage detection circuit and a star circuit, wherein the difference voltage detection circuit is electrically connected with the star circuit. The power grid voltage detection circuit exchanges a previous common voltage transformer sampling circuit as a difference sampling circuit, thus reducing the cost. The power grid voltage detection circuit increases the star circuit which is formed by chip resistors so that the circuit becomes more reliable and flexible; and the star circuit is suitable for a three-phase three-wire system and a three-phase four-wire system of power grid phase voltage sampling, thus unifying the processing of the power grid voltage through a program and at the same time improving the reliability of the product.

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