公开(公告)号：US5751532A

公开(公告)日：1998-05-12

申请号：US608306

申请日：1996-02-28

申请人： John M. Kanuchok ,  Jeffrey A. Burnworth ,  James A. Bright

发明人： John M. Kanuchok ,  Jeffrey A. Burnworth ,  James A. Bright

IPC分类号： H02H3/093 ,  H02H3/00

CPC分类号： H02H3/0935

摘要： A relay for monitoring an electrical system to protect the electrical system from an overcurrent condition as a time dependent function of an electrical current level in the electrical system is disclosed. The relay includes a memory which stores a current level count and a current level detector coupled to the electrical system which detects the electrical current level in the electrical system over time. A microprocessor responds to the current level detector by varying the current level count in the memory as a function of the electrical current level over time. The microprocessor also detects an occurrence of the electrical current level falling below a minimum current level. A timer responds to the microprocessor by measuring a period of time during which the electrical current level is less than the minimum current level. The microprocessor responds to the timer by varying the current level count in the memory as a function of the measured period of time during which the electrical current level is below the minimum current level. A method of monitoring an electrical system to protect the electrical system from an overcurrent condition as a time dependent function of an electrical current level in the electrical system is also disclosed. Other apparatus and methods are also disclosed.

摘要翻译： 公开了一种继电器，用于监测电气系统以保护电气系统免受过电流状况的影响，作为电气系统中电流水平的时间依赖功能。 继电器包括存储当前电平计数的存储器和耦合到电气系统的电流电平检测器，该电气系统随着时间检测电气系统中的电流水平。 微处理器通过随着时间随着电流电平的变化而改变存储器中的当前电平计数来响应电流电平检测器。 微处理器还检测电流水平的下降低于最小电流水平。 定时器通过测量电流电平小于最小电流电平的时间段来响应微处理器。 微处理器通过根据测量的电流水平低于最小电流水平的时间段的函数来改变存储器中的当前电平计数来响应定时器。 还公开了一种监测电气系统以保护电气系统免受过电流状况的方法，作为电气系统中的电流水平的时间依赖功能。 还公开了其它装置和方法。

公开(公告)号：US4881028A

公开(公告)日：1989-11-14

申请号：US205952

申请日：1988-06-13

申请人： James A. Bright

发明人： James A. Bright

IPC分类号： G01R15/22

CPC分类号： G01R15/22

摘要： A new type of immersible fault detector which includes a magnetic coupling link that can be coupled to a power line and a detector receives energy proportional to the load currents flowing in the power line and energizes a light source. A fiber-optics light waveguide or cable is connected to the detector so as to detect the light generated by the detector and has its opposite connected to an indicator which is remote from the detector and is electrically insulated therefrom so that the condition of the power line can be determined.

摘要翻译： 一种新型的浸入式故障检测器，其包括可耦合到电力线的磁耦合链路，并且检测器接收与在电力线中流动的负载电流成比例的能量并激励光源。 纤维光学光波导或电缆连接到检测器，以便检测由检测器产生的光，并且其相反地与远离检测器的指示器相连，并与之电绝缘，使得电力线的状态 可以确定。