公开(公告)号：US3962664A

公开(公告)日：1976-06-08

申请号：US607161

申请日：1975-08-25

申请人： Henry Ty ,  Alfred J. White ,  Roger L. Boisvert ,  Raymond M. Sears

发明人： Henry Ty ,  Alfred J. White ,  Roger L. Boisvert ,  Raymond M. Sears

IPC分类号： H01H71/14 ,  H01H79/00 ,  H04M1/74 ,  H01H61/00

CPC分类号： H01H71/14 ,  H01H79/00 ,  H04M1/745

摘要： A current sensing, self-heating device for protecting equipment against abnormal current levels which is automatically resettable under mild overcurrent conditions and nonresettable under severe overcurrent conditions. The device comprises a thermostat metal assembly with a temperature compensating portion and an actuating portion which is placed adjacent a nonresettable two-position snap-acting blade electrically connected to ground. During normal operation current flows from the line source through the actuating portion of the thermostat metal assembly to the equipment. However, if an overcurrent condition occurs the heat generated in the actuating portion of the assembly will bend the assembly and cause it to make contact with the blade shorting the current from the line source to ground. As long as the overcurrent is not above a prescribed level, the assembly will bend back out of contact with the electrically grounded blade and again provide current to the equipment upon resumption of normal current levels. But if the overcurrent is above a preselected level, thermostat assembly will cause the nonresettable blade to snap to permanently electrically ground the device.

摘要翻译： 一种用于保护设备免受异常电流水平的电流感应自加热装置，可在温和的过电流条件下自动复位，并在严重的过电流条件下不可恢复。 该装置包括具有温度补偿部分和致动部分的恒温金属组件，该致动部分被放置在与地面电连接的不可分离的两位置快速作用叶片附近。 在正常操作期间，电流从线源流经恒温金属组件的致动部分流到设备。 然而，如果发生过电流状况，则在组件的致动部分中产生的热会使组件弯曲，并使其与刀片接触，从而将来自线路源的电流短路到地。 只要过电流不超过规定的水平，组件将弯曲回脱离与电接地叶片的接触，并在恢复正常电流水平时再次向设备提供电流。 但是，如果过电流高于预选电平，则恒温器组件将导致不可拆卸的刀片卡扣以永久性地电气接地设备。