摘要:
The invention relates to a switching device for overvoltage arresters, consisting of mechanically prestressed first switching elements which have surge current capability and form, with the arrester(s) of the overvoltage arrester, a series circuit of a surge current path, and a fault current path connected to the series circuit. According to the invention, second switching elements are arranged in the fault current path and are mechanically coupled to the first switching elements in such a manner that, in the case of lasting impermissible loads on the arresters of the overvoltage arrester in the surge current path, the first switching element(s) is/are triggered with the consequence of DC isolation of the surge current path from the respective network.
摘要:
The invention relates to a surge protection device, comprising at least one surge arrester and one thermally trippable switching device connected in series with the surge arrester, wherein the above-mentioned means form a structural unit and the thermal tripping means is arranged in the region in which heating of the surge arrester is to be expected on overloading thereof. The thermal tripping means is in the form of a stop part through which there is no operating or surge current flowing and which effects or enables unlatching of the switching device in the case of thermal overload. Furthermore, the stop part is coupled thermally and mechanically to a surface side of the surge arrester and blocks the movement path of a mechanically prestressed unlatching slide. In accordance with the invention, a contact platelet is inserted in the unlatching slide, said contact platelet producing an electrical connection between elements of the switching device and, with unlatching, the contact platelet is subjected to a shifting movement resulting in an interruption to the series circuit and movement of the unlatching slide into the space previously assumed by the contact platelet, wherein at least the section of that region of the unlatching slide which separates the elements of the switching device is insulating.
摘要:
The invention relates to a disconnecting and switching circuit for the overvoltage protection comprising at least one dissipation element, further one thermal disconnecting point which is integrated in the electrical connection path of the dissipation element, wherein the thermal disconnecting point comprises a movable conductor element, which is under a mechanical pretension and which, in the event of disconnecting, moves from a first position into a second position, wherein by reaching a second position an electrical switching is brought about, wherein a complete electrical disconnection of the dissipation element in relation to the connection path is only given once the movable conductor element has reached the second position. According to the invention, the thermal disconnecting point is formed by the movable conductor element and a fixed contact element, wherein the movable conductor element is fastened to the fixed contact element by a thermally detachable means and the contact element has a groove or an opening, in which a finger-like extension of the movable conductor element immerses in such a way that a disconnection between groove or opening and finger-shaped extension is only given when the second position of the movable conductor element is given.
摘要:
The invention relates to an adapter for mounting overvoltage protection devices designed as plug-in modules (3) on a circuit board in a terminal device, wherein the adapter comprises a socket (1) with means for electrically connecting the convertible plug-in module (3) received in the respective socket (1) to the application circuit of the terminal device, and has at least one chamber (2) open at the top and delimited by side walls (20; 21). At least one assembly and adjustment extension (4), having a cross-sectional shape that is substantially complementary to an opening in the circuit board of the terminal device, extends from the underside (23) of the chamber. Electrical connection parts (6) inside the chamber area that can be occupied by the plug-in module (3), allowing a direct electrical connection to the circuit board, are additionally led through the underside (23), wherein the electrical connection parts (6) form an assembly with internal contacts (5) for the respective plug-in module (3).
摘要:
The invention relates to a surge arrester arrangement having at least one varistor dissipation element and also to a disconnection apparatus in order to disconnect the at least one varistor dissipation element from the power supply system, wherein the disconnection apparatus is incorporated in the electrical connection path of the arrester arrangement. According to the invention, a current limiting resistor is connected in series to the varistor dissipation element in the electrical connection path in order to reduce the short-circuit current of the connected power supply system when the disconnection apparatus does not respond and there is an overload short-circuit state in the interior of the varistor dissipation element.
摘要:
The invention relates to an arrangement for forming a thermal isolation point, consisting of an isolation strip to which a prestressing force can be applied, an electrical means which produces thermal energy and has a contact surface, in particular in the form of an overvoltage protection element or a component of such an element, as well as an integral connection means, which changes when heated in a defined manner in the aggregate state, in particular a solder. According to the invention, an adapter part is provided between the isolation strip and the contact surface of the electrical means, wherein the adapter part can on the one hand be connected to the contact surface in a purely interlocking and/or force‑fitting manner, and on the other hand is connected in a manner which can provide thermal isolation integrally to the isolation strip.
摘要:
The invention relates to an overvoltage protection device having one or more parallel-connected voltage-limiting elements which are located in one physical unit, such as varistors, diodes or means of this type configured in the form of a disc, comprising a shell apparatus in order to electrically disconnect the overvoltage-limiting elements when they are thermally overloaded, and means for indication and/or signalling of the fault state which then occurs, wherein the switching apparatus is connected via a means which can be released thermally, such as adhesive or a solder, to a connecting contact of the at least one overvoltage-limiting element, and/or to an external terminal contact or plug contact. According to the invention, the switching apparatus is in the form of a solid U-shaped switching fork, the fork tines of which run essentially parallel to the side surfaces of the overvoltage-limiting element, holding the latter in the space between the tines. At least one of the fork tines rests on the at least one connecting contact and is fixed there via the means which can be released thermally wherein, when disconnection occurs, the disconnection slide is moved with the switching fork being driven and, in the process, the connection point between the fork tines and the connecting contact represents a fulcrum for the switching fork movement.