公开(公告)号：EP2446281A1

公开(公告)日：2012-05-02

申请号：EP10734518.3

申请日：2010-06-21

申请人： Itron France

发明人： AUFFRET, Yves ,  LAGAUTRIERE, Jean-Loup ,  CHARTOUNI, Patrick

IPC分类号： G01R11/24 ,  H02H11/00

CPC分类号： G01R22/066 ,  G01R11/25 ,  G01R21/133

摘要： The invention relates to an electricity meter for measuring a phase current and a voltage which are used by a user (3) over at least one phase n of an electric power distribution network (1), comprising a metrology portion (2) with an uninsulated current sensor (Rshunt) in series on the phase n conductor for measuring the current of phase Iphn from a measurement mes Vmes of the difference in potential at the terminals of the sensor, a first voltage divider (R4, R5) receiving the phase voltage as an input and outputting a measurement Vphn upstream of a difference in potentials between a first potential given by the conductor and a second potential, and a cutoff contactor (K1) in series with the current sensor. According to the invention, the metrology portion (2) comprises a monitoring device that includes a second voltage divider (R1, R2) connected in parallel on the serial assembly formed by the sensor (Rshunt) and the cutoff contactor (K1), outputting a measurement Vphn upstream/downstream that represents the difference in potential between the phase conductor downstream from the cutoff contactor (K1) and the phase conductor upstream from the metrology portion. The various measurements can be used to detect various situations (pole integrity of the cutoff contactor, fraud by short-circuit, downstream self-generation, resetting the main circuit breaker) when the contactor is open or closed.

摘要翻译： 本发明涉及一种用于测量用户（3）在电力分配网络（1）的至少一个相位n上使用的相电流和电压的电表，包括具有未绝缘的测量部分（2） 串联在n相导体上的电流传感器（Rshunt），用于从传感器端子处的电位差的测量值Vmes测量相位Iphn的电流，接收相位电压的第一分压器（R4，R5）为 输入并输出由导体给出的第一电位与第二电位之间的电位差的上游的测量Vphn以及与电流传感器串联的切断接触器（K1）。 根据本发明，测量部分（2）包括监测装置，其包括在由传感器（Rshunt）和切断接触器（K1）形成的串联组件上并联连接的第二分压器（R1，R2），输出 测量上游/下游的Vphn，其表示在切断接触器（K1）下游的相位导体与测量部分上游的相位导体之间的电位差。 当接触器打开或关闭时，各种测量可用于检测各种情况（断路器的极完整性，短路故障，下游自我发电，重启主断路器）。