公开(公告)号：US10320184B2

公开(公告)日：2019-06-11

申请号：US14897242

申请日：2014-06-05

Applicant: ABB TECHNOLOGY AG

Inventor： Emil Kalina ,  Vaclav Prokop

IPC: H02H3/16 ,  H02H7/22

Abstract: A method and apparatus for earth fault in power high and/or medium voltage system may enhance a protection system for special technical task, which is to measure residual current, the invention is, that for earth fault protection in power system or a part of power system, for example, but not limited to, cable connectors, wherein residual current is determined indirectly by the calculation from the phase current values, obtained from the output signals of Rogowski-coil based current sensors.

公开(公告)号：US20160134101A1

公开(公告)日：2016-05-12

申请号：US14897242

申请日：2014-06-05

Applicant: ABB TECHNOLOGY AG

Inventor： Emil Kalina ,  Vaclav Prokop

IPC: H02H7/22

CPC classification number: H02H7/222 ,  H02H3/165

Abstract: A method and apparatus for earth fault in power high and/or medium voltage system may enhance a protection system for special technical task, which is to measure residual current, the invention is, that for earth fault protection in power system or a part of power system, for example, but not limited to, cable connectors, wherein residual current is determined indirectly by the calculation from the phase current values, obtained from the output signals of Rogowski-coil based current sensors.

Abstract translation: 电力高压和/或中压系统接地故障的方法和装置可以增强用于测量剩余电流的特殊技术任务的保护系统，本发明是电力系统或部分电力中的接地故障保护 系统，例如但不限于电缆连接器，其中通过从基于罗氏线圈的电流传感器的输出信号获得的相电流值的计算间接地确定剩余电流。