公开(公告)号：US20040174644A1

公开(公告)日：2004-09-09

申请号：US10791731

申请日：2004-03-04

Applicant: ABB Service S.r.I

Inventor： Severino Colombo ,  Antonio Maria Gabello

IPC: H02H003/00

CPC classification number: H02H3/165 ,  G01R31/025 ,  Y10T307/937

Abstract: An electronic tripping device for low-voltage circuit-breakers comprises means for detection and calculation of a ground-fault current operatively connected to tripping means of said circuit-breaker. The means for detection and calculation comprise: current-sensor means, which supply, for each pole, a signal proportional to the current; means for detection of the sign of the current, which, for each pole, supply a signal representing the sign of the current; current-rectifying means, which, for each pole, supply a rectified signal proportional to the current circulating in said pole; and first numerical-processing means, which supply a value with sign representing a ground fault by means of a numerical-processing operation comprising the multiplication of the signal representing the sign by the corresponding rectified signal.

Abstract translation: 用于低压断路器的电子跳闸装置包括用于检测和计算可操作地连接到所述断路器的跳闸装置的接地故障电流的装置。 用于检测和计算的装置包括：电流传感器装置，其为每个极提供与电流成比例的信号; 用于检测电流的符号的装置，其对于每个极提供表示电流的符号的信号; 电流整流装置，其对于每个极提供与在所述极中循环的电流成比例的整流信号; 以及第一数字处理装置，其通过数字处理操作来提供表示接地故障的符号的值，该数字处理操作包括表示符号的信号乘以对应的整流信号。