公开(公告)号：US5113307A

公开(公告)日：1992-05-12

申请号：US487897

申请日：1990-03-06

申请人： Herbert Meyer ,  Zoltan Giday ,  Thomas Balow

发明人： Herbert Meyer ,  Zoltan Giday ,  Thomas Balow

IPC分类号： H01H47/04 ,  H01H47/32 ,  H03K17/695

CPC分类号： H01H47/325

摘要： An electronic contactor controller circuit able to handle high currents and voltages includes an integrated circuit power circuit switch which provides a measuring output signal representative of the load current to an operational amplifier current to voltage convertor. The output voltage of the operational amplifier is provided to an input of a comparator, and at least one reference voltage, from reference voltage generating circuitry, is provided to the other input of the comparator. The comparator outputs a signal to control a timer circuit, which in turn controls the current switch.

摘要翻译： 能够处理高电流和电压的电子接触器控制器电路包括集成电路电源电路开关，该开关提供表示负载电流的测量输出信号到运算放大器电流到电压转换器。 将运算放大器的输出电压提供给比较器的输入，并且从参考电压产生电路至少一个参考电压被提供给比较器的另一个输入端。 比较器输出信号来控制定时器电路，定时器电路又控制电流开关。

公开(公告)号：US06459349B1

公开(公告)日：2002-10-01

申请号：US09519222

申请日：2000-03-06

申请人： Zoltan Giday ,  Alan J. Messerli

发明人： Zoltan Giday ,  Alan J. Messerli

IPC分类号： H01F1706

CPC分类号： H01F3/14 ,  H01F38/30 ,  H01H71/125

摘要： A circuit breaker assembly having an electronic trip unit used to detect an overcurrent condition in a protected electrical circuit. The electronic trip unit being electrically connected to a current transformer used to sense electrical current and provide operating power to the electronic trip unit. The current transformer comprising a metal core having a top surface and a bottom surface where the difference between the top and bottom surfaces defines a height of the core. The core having a concentrical opening extending through the height so that the distance between an outside point on the concentrical opening and the closest outside point of the core defines a thickness of the core at that point. Passing through the core opening is a primary winding and encircling the thickness of the core is a secondary winding. To optimize usage of the current transformer, a partial air gap is added to the metal core so that the range of operation is maximized while at the same time minimizing the remanence attenuation.