公开(公告)号：US5861795A

公开(公告)日：1999-01-19

申请号：US807171

申请日：1997-02-27

申请人： Joachim Glatz-Reichenbach ,  Felix Greuter ,  Gerhard Mauthe ,  Zdenek Pelanek ,  Claus Schuler ,  Jorgen Skindhoj ,  Ralf Strumpler

发明人： Joachim Glatz-Reichenbach ,  Felix Greuter ,  Gerhard Mauthe ,  Zdenek Pelanek ,  Claus Schuler ,  Jorgen Skindhoj ,  Ralf Strumpler

IPC分类号： H01C1/14 ,  H01C7/02 ,  H01C7/12 ,  H01C7/13 ,  H01C13/02 ,  H01C7/10

CPC分类号： H01C7/13 ,  H01C1/1406 ,  H01C13/02 ,  H01C7/027 ,  H01C7/12

摘要： The current-limiting resistor has two connection electrodes (1, 2) which are arranged parallel to one another as well as a resistance body (3) which has PTC behavior and with which large-area contact is made by the connection electrodes (1, 2). A varistor (40) is in electrically conductive contact with the resistance body (3). The resistance body (3) contains two contact areas (50, 51) as well as a response point (60) which is connected in parallel with the varistor (40) via the two contact areas (50, 51) and implements a PTC transition above a threshold value of a current flowing through the resistor.Since the resistance body effects the electrical contact with the varistor (40) in the case of this resistor, no metal connection electrodes are required for the varistor. At the same time, due to the outward displacement of the response point (60) away from the varistor (40), the operational reliability of the resistor is considerably improved.Effective current limiting in load circuits which are operated at high voltage can be achieved by a series circuit formed by a plurality of varistors (40, 41, . . . ) provided in a resistance body (3) which is designed in the form of a meander or is of some other continuous design.

摘要翻译： 限流电阻器具有彼此平行布置的两个连接电极（1,2）以及具有PTC特性的电阻体（3），并且由连接电极（1）形成大面积接触， 2）。 变阻器（40）与电阻体（3）导电接触。 电阻体（3）包含两个接触区域（50,51）以及通过两个接触区域（50,51）与压敏电阻器（40）并联连接的响应点（60），并实现PTC过渡 高于流经电阻器的电流的阈值。 由于电阻体在这种电阻的情况下会影响与变阻器（40）的电接触，所以不可避免地使用金属连接电极。 同时，由于响应点（60）远离压敏电阻（40）的向外位移，电阻器的操作可靠性大大提高。 在高电压下工作的负载电路中的有效电流限制可以由设置在电阻体（3）中的多个变阻器（40,41 ...）形成的串联电路来实现，该电阻体设计成 曲折或是其他连续设计。

公开(公告)号：US6038117A

公开(公告)日：2000-03-14

申请号：US1807

申请日：1997-12-31

申请人： Edgar Dullni ,  Joachim Glatz Reichenbach ,  Jan Kuhlefelt ,  Ruzica Loitzl ,  Zdenek Pelanek ,  J.o slashed.rgen Skindh.o slashed.j ,  Ralph Strumpler

发明人： Edgar Dullni ,  Joachim Glatz Reichenbach ,  Jan Kuhlefelt ,  Ruzica Loitzl ,  Zdenek Pelanek ,  J.o slashed.rgen Skindh.o slashed.j ,  Ralph Strumpler

IPC分类号： H01H33/16 ,  H02H3/02 ,  H02H3/093

CPC分类号： H02H3/025 ,  H01H33/161

摘要： A power switching apparatus is disclosed which has an electrical conductor to which high voltage can be applied. A series of circuits formed by a switching point and a current-limiting element which contains PTC thermistors and varistors is arranged in the cable run of the electrical conductor. An apparatus for operating the switching point interacts with the current-limiting element. The current-limiting element has n (where n is a natural number greater than 1) series-connected parallel circuits each having at least one PTC thermistor and at least one varistor connected in parallel with it. A current sensor arranged in the cable run of the electrical conductor or those connections of one of the PTC thermistors and of the varistor connected in parallel with it which are interconnected at two junction points in one of the parallel circuits are operatively connected to the input of the operating apparatus. Such a power switching apparatus is designed using economic components, such as PTC thermistors and varistors for low-voltage applications, and a switching device which is designed for switching only low currents and can effectively limit large and small short-circuit currents without the current-limiting element connected upstream of the switching device, and/or the switching device, being overloaded.

摘要翻译： 公开了一种具有可以施加高电压的电导体的电力开关装置。 由电导体的电缆线路中布置有由开关点形成的一系列电路和包含PTC热敏电阻和压敏电阻的限流元件。 用于操作切换点的装置与限流元件相互作用。 限流元件具有n个（其中n是大于1的自然数）串联连接的并联电路，每个并联电路具有至少一个PTC热敏电阻和至少一个压敏电阻并联连接。 布置在电导体的电缆线路中的电流传感器或者其中一个PTC热敏电阻器和与其并联连接的压敏电阻器的那些连接件在一个并联电路中的两个连接点处互连，可操作地连接到 操作装置。 这种电力开关装置是使用诸如PTC热敏电阻和用于低电压应用的压敏电阻的经济组件设计的，以及设计用于仅切换低电流并且可以有效地限制大的和小的短路电流而没有电流 - 连接在开关装置上游的限流元件和/或开关装置过载。