公开(公告)号：US5155649A

公开(公告)日：1992-10-13

申请号：US592451

申请日：1990-10-02

申请人： Francis Y. T. Hung ,  James E. Anderson ,  Paul A. Taylor ,  William P. Trumble

发明人： Francis Y. T. Hung ,  James E. Anderson ,  Paul A. Taylor ,  William P. Trumble

IPC分类号： H01C7/12 ,  H01T1/14

CPC分类号： H01C7/126 ,  H01T1/14

摘要： An overvoltage protector for protecting equipment, especially telephone equipment, against high voltage surges such as are caused by lightning in the vicinity of the equipment or the cables to which it is connected, comprises one or more overvoltage protectors (42,58) mounted upon one face of an insulating support (18). A generally planar contact member (62) mounted upon the support member has a ground contact member (90) to make contact with a ground electrode (114) in the equipment to be protected and with each overvoltage protector. A spacer (60) of fusible plastics material extending between the contact member (62) and an interconnection (26) to one terminal (42A) of the protector melts when a sustained fault occurs. As the spacer melts, it permits an electrical connection between the contact member and the line to which the overvoltage protector is connected, effectively short-circuiting the line to ground. Overcurrent protection may be provided by means of a resistor (116) disposed in series with the line and located close to the plastics spacer so as to heat the spacer when an overcurrent occurs. In one case, the spacer comprises a film interposed directly between a pair of contacts which serve to short-circuit the protector. In another case, the spacer comprises a limb with relatively thin lateral projections which melt and shear. In both cases, the spacer preferably comprises high density, high molecular weight polyethylene.

摘要翻译： 用于保护设备，特别是电话设备的过电压保护器，防止设备附近的雷电或其连接的电缆引起的高压浪涌，包括一个或多个安装在一个上的过电压保护器（42,58） 绝缘支架（18）的表面。 安装在支撑构件上的大致平面的接触构件（62）具有接地接触构件（90），以与要保护的设备中的接地电极（114）和每个过电压保护器接触。 当保持器发生持续故障时，在接触构件（62）和互连件（26）到保护器的一个端子（42A）之间延伸的可熔塑料的间隔件（60）熔化。 当间隔件熔化时，允许接触构件与过电压保护器连接的线路之间的电连接有效地将线路对地短路。 过电流保护可以通过与线路串联设置的电阻器（116）提供，并且位于靠近塑料隔板的位置，以便在发生过电流时加热间隔件。 在一种情况下，间隔件包括直接插入在用于使保护器短路的一对触点之间的膜。 在另一种情况下，间隔件包括具有相对薄的横向突出物的肢体，其熔化和剪切。 在两种情况下，间隔物优选包含高密度高分子量聚乙烯。