公开(公告)号：US3838319A

公开(公告)日：1974-09-24

申请号：US41487973

申请日：1973-11-12

Applicant: ASEA AB

Inventor： HAMMARLUND G ,  JOHANSSON A

IPC: H03K17/292 ,  H01H47/18

CPC classification number: H03K17/292

Abstract: An arrangement for achieving a short recovery time in a time lag relay, composed of static components in which the delay is determined by the charging time of a capacitor, includes two programmable unijunction transistors with the anode-cathode path in parallel with the capacitor and the control electrodes connected each to one voltage divider between the poles of the feeding voltage source. The voltage dividers are so designed and the control electrodes so connected to their voltage dividers that, during the charging of the capacitor, the voltage on the control electrode of the first transistor is higher than the voltage on the control electrode of the second transistor. If the charging process is interrupted before the relay has operated, the voltage on the control electrode of the first transistor falls more quickly than the voltage on the control electrode of the second transistor.

Abstract translation: 在由延迟由电容器的充电时间确定的静态分量组成的时滞继电器中实现短恢复时间的装置包括两个可编程单结晶体管，阳极 - 阴极通路与电容器并联， 控制电极分别连接到馈电电压源极之间的一个分压器。 分压器如此设计，并且控制电极连接到它们的分压器，在电容器充电期间，第一晶体管的控制电极上的电压高于第二晶体管的控制电极上的电压。 如果在继电器操作之前充电过程中断，则第一晶体管的控制电极上的电压比第二晶体管的控制电极上的电压下降得更快。

公开(公告)号：US3821608A

公开(公告)日：1974-06-28

申请号：US34875173

申请日：1973-04-06

Applicant: ASEA AB

Inventor： JOHANSSON A ,  LYCKSTEDT B

IPC: H01T4/20 ,  H02H1/04

CPC classification number: H01T4/20

Abstract: A surge diverter is mounted in an inner casing of electrically insulating material which is enclosed in an outer housing of electrically conducting material which is connected to earth. In the space between the inner casing and the housing a number of grading rings in the form of toroid rings are fastened to the inner casing at a distance from it. The grading rings are arranged at a distance from each other which increases counting from the top of the diverter.