摘要:
The invention relates to a discharger arrangement for high measurement voltages, wherein at least two dischargers comprising opposing electrodes are connected in series, and at least one of the dischargers is active, that is, can be triggered, and having an overvoltage protection device for use as a grid arrester capable of bearing lightning current, for use as a grid arrester capable of bearing lightning current. According to the invention, the dischargers are located in an explosion-proof encapsulation having at least one pressure equalization opening. An insert bridging the distance between the main electrodes of the passive discharger is further made of a low-impedance material, wherein the low-impedance material has strongly non-linear behavior under current load with regard to off-peak residual voltage, wherein the overcurrent protection device further comprises a series circuit of a plurality of fusible elements forming a geometrically prescribed mechanical and electrical combination.
摘要:
The invention relates to a surge arrester having at least one arresting element, for example a varistor and a disconnection apparatus, in order to disconnect one pole or all poles of the arresting element or elements from the power supply system, with the disconnection apparatus comprising a solder point (11) which is included in the electrical connecting path within the arrester, with a moving conductor section (12) or a moving conductive link (22) being connected via the solder point (11) to the arresting element on the one hand, and with the conductor section (12) or the link (22) being connected on the other hand to an electrical external connection of the arrester, and furthermore having a spring (15) which produces a prestressing force, with the force vector relating to them acting directly or indirectly on the conductor section (12) or the link (22) in the disconnection apparatus. According to the invention, a blocking element (17) which can be tripped thermally blocks the moving conductor section (12) or the moving conductive link (22) with regard to the prestressing force vector, so that the solder point (11) of the disconnection apparatus is not subject to any permanent load on the force side.
摘要:
The invention relates to an overvoltage protection device (7), which comprises at least one overvoltage protection unit having at least one contact lug (14) and which comprises a mechanical disconnection apparatus that is activated in the event of a thermal overload, wherein the mechanical disconnection apparatus comprises a connection element. The connection element can be moved from a closed position to a current-interrupting or voltage-disconnecting position by means of a slide (4) preloaded by spring force, wherein the connection element consists of a pair of current-dividing metal bows (1, 1'), the ends of which directed toward the contact lug of the overvoltage protection unit extend in parallel and which accommodate the respective contact lug of the overvoltage protection unit in the centre of the bows, wherein the closed position is secured between the connection element and the contact lug in the region of the ends of the bows extending in parallel by means of a solder (3). The ends of the bows facing away from the contact lug of the overvoltage protection unit are connected to one another in such a way that a free space is enclosed and have a segment for outer connection parts in the further course, wherein the slide having a preloading spring is inserted in the free space in such way that the spring preload is oriented in the direction of the contact lug of the overvoltage protection unit. The slide has a wedge shape and/or segments of the bows form a slanted surface in order to produce a force component acting on the ends of the bows extending in parallel when the slide moves, such that the ends of the bows extending in parallel move away from the contact lug laterally. According to the invention, the ends of at least one of the bows pointing toward the contact lug form a stop for a visual indicator that can be pivoted about an axis, wherein the pivoting motion is enabled when the ends of the bows extending in parallel are removed from the contact lug laterally by means of the slide.
摘要:
The invention relates to a surge arrester which, in a housing (7), has at least one arrester element (3), in particular a varistor, a solder-fixed thermal disconnection point (5), which is connected to the arrester element, and a damage indicating device (11) for displaying the fault state, wherein the damage indicating device also queries the state of a thermal disconnection device, in particular a fuse, and presents the possible fault states of the arrester element and of the disconnection device mechanically in an OR combination in a suitable way. Furthermore the thermal disconnection device comprises a movable component, which is fixed by an indicator wire and is released after the melting or destruction of said wire. According to the invention, a guide part (9) for a compression spring (10) or similar force accumulator is provided on or in the housing, wherein a first spring end acts on the thermal disconnection point directly or indirectly by way of a disconnection plunger or disconnection cylinder, and a second end of the compression spring, opposite of the first end, acts on a slide (8) directly or indirectly by way of a guide ring. Furthermore, the slide is subjected to a force on a first side in the displacement direction directly by a further spring (12) or indirectly by the damage indicating device. The second side of the slide, opposite of the first side, is operatively connected to the movable component of the thermal disconnection device in such a way that it follows the release movement of the movable pin under the action of force from the compression spring. The second side of the slide is designed in such a way that a longitudinal slide movement is able to take place as a result of the force of the further spring with the thermal disconnection point triggered and the component of the thermal disconnection device fixed and also with an unchanged position between the slide and guide part and, furthermore, a reciprocating movement relative to the guide part is able to take place, with a subsequent longitudinal slide movement, with the indicator wire released, together with the movable component of the thermal disconnection device. The second end of the spring or at least part of the guide ring engages in a cutout or depression in the slide in order to lock the latter and the damage indicating device in the proper state of the arrester.
摘要:
The invention relates to an arresting device, particularly for pluggable surge arresters, wherein the arresting point is configured as a thermally triggered soldered connection between an outer connection contact of the arrester and a connection point of the at least one arrester element, for example a varistor disk, and wherein furthermore a pretensioning force in the separating direction is applied to the soldered connection. The invention relates further to at least one outer connection contact being a metallic formed part, having an integral extension leg, the end thereof facing the soldered connection having a U-shape, furthermore the connection point of the arrester element being configured as a flat piece. The flat piece is in contact with a section of the U-shaped end of the formed part and is secured thereto by a solder, and the metallic formed part is under inherent spring pretension and engages a finger subject to a spring pretensioning force and mounted on the guide in the space formed and encompassed by the U-shape of the formed part section, in order to bring about a quick and secure electrical separation of the soldering connection upon releasing, by supporting the separation movement of the formed part and also the displacement of the solder material.
摘要:
The invention relates to a connection and base part for accommodating a pluggable surge arrester, comprising a base (13) and a U-shaped part (17), which is connected or can be connected to the base (13) and has guide and/or latching means for accommodating the complementarily designed surge arrester on the mutually facing limb inner sides, a telecommunication switch (11), which is inserted in the base (13), with connections (21) passed to the outside and an actuating device, which is connected to the telecommunication switch (11) and has a plunger (8), which is accessible via a cutout in the limb connecting section of the U-shaped part (17) in order to be operatively connected to a function display, a thermal release or another monitoring device of the pluggable surge arrester. According to the invention, a connecting link-type, groove-shaped guide (12) is introduced in the base (13) and has a continuously arcuate or arcuate/linear profile, wherein the guide (12) extends between the plunger (8) and the telecommunication switch (11). Furthermore, an actuating rail (9), whose form is similar to that of the connecting link, is inserted into the guide, wherein this actuating rail, with an integral design, has the plunger (8) and an areal part (10) for activating the telecommunication switch (11).