公开(公告)号：EP3405796A1

公开(公告)日：2018-11-28

申请号：EP17712184.5

申请日：2017-01-09

申请人： Safran Electrical & Power

发明人： HENRARD, Pierre, Henri

IPC分类号： G01R15/18 ,  H02H7/04 ,  H01F38/32 ,  G01R1/36 ,  G01R31/00

CPC分类号： G01R15/183 ,  G01R1/36 ,  G01R31/008 ,  H01F38/28 ,  H01F2038/305

摘要： Disclosed is a current-measuring device (1, 10) protected against surge voltages if the device (1, 10) is opened. The device (1, 10) comprises a first current transformer (2), a first connecting terminal (4) to which a first terminal (21) of the first current transformer (2) is connected, a second connecting terminal (5) to which a second terminal (22) of the first current transformer (2) is connected, a protective resistor (7), a first terminal (71) of which is connected to the second connecting terminal (5), and a load resistor (6) which is connected between the first and the second connecting terminals (4 and 5) and at the terminals of which a voltage is measured, from which the current is determined which flows in a circuit that extends through the first current transformer (2). The device further comprises a second current transformer (3) connected to the terminals (71 and 72) of the protective resistor (7), and a current by-pass means (8, 80) connected between the first connecting terminal (4) and a second terminal (72) of the protective resistor (7).