公开(公告)号：US07079365B2

公开(公告)日：2006-07-18

申请号：US10718244

申请日：2003-11-20

申请人： Scott R. Brown ,  Kyle P. Hunter ,  Roy S. Colby

发明人： Scott R. Brown ,  Kyle P. Hunter ,  Roy S. Colby

IPC分类号： H00H3/00

CPC分类号： H02H3/04 ,  H02H3/331

摘要： A microcontroller-based system to detect ground-fault and grounded-neutral conditions in a monitored circuit of an electrical distribution system having line and neutral conductors. The system includes a single sensor producing an output signal responsive to current flow in both the line and neutral conductors of the monitored circuit, and a microcontroller receiving the sensor output signal and initiating the generation of a circuit status signal indicating one of a normal operating condition, a ground-fault condition or a grounded-neutral condition in the monitored circuit. The microcontroller is programmed to continuously test for ground-fault conditions by evaluating the sensor output signal and, at selected intervals, test for grounded-neutral conditions by evaluating the sensor's output signal response to a microcontroller initiated ping in the sensor circuit.

摘要翻译： 一种基于微控制器的系统，用于检测具有线路和中性导体的配电系统的监控电路中的接地故障和接地中性条件。 该系统包括单个传感器，其产生响应于被监测电路的线路和中性线路中的电流的输出信号，以及微控制器，其接收传感器输出信号，并启动生成指示正常操作条件之一的电路状态信号 ，受监控电路中的接地故障状况或接地中性状态。 微控制器被编程为通过评估传感器输出信号来连续测试接地故障情况，并且以选定的间隔通过评估传感器对传感器电路中微控制器启动的ping的输出信号响应来测试接地中性条件。