摘要:
The invention relates to a process for dimensioning an cut-off switch of arresting element for a surge absorber arrester whose switching motion movement is performed by a control tab that is adjusted by a permanently active spring force in the direction opposite to the holding force established by a protective solder. As per the invention, the force of the initial stress affecting the control tab and/or its solder location that generates an unsoldering force and/or a switching force, in addition to a permanently active initial stress, by at least one additional initial prestress force not dependent upon it, as well as supporting a supplementary switching force with an identical direction of flow, whereby its distribution of force is set in such a way at rest that when in rest moderate force affects the soldering location and a resulting force that is as great as possible conducts the switching motion during the unsoldering action.
摘要:
The invention relates to a spark gap arrangement for use in power supply systems, especially in low-voltage systems, comprising an arcing chamber in which an electric arc is formed between two electrodes of the spark gap. An intermediate chamber (5) is provided downstream of the arcing chamber (3). Said intermediate chamber has a much greater volume than the arcing chamber (3). A pressure-proof flow channel (4), preferably consisting of metal, is provided as the connection between the arcing chamber (3) and the intermediate chamber (5).
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 a plug-in combination of appliances for protecting against overvoltages, said combination of appliances comprising: a socket-type lower part and at least one plug-in module, which can both receive overvoltage protection elements; contact elements and contact counter elements that are respectively arranged in the lower part and in the plug-in module; and complementary guide rails or guide grooves for inserting or pushing-on and fixing the respective plug-in module. According to the invention, functionally separated, mechanical catch or snap-in elements act between the respective plug-in module and the socket-type lower part independently of the forces which hold together the contact elements and the contact counter elements in a positively fixed and/or non-positively fixed manner when the plug-in module is in use. The catch or snap-in function can be cancelled without any mechanical auxiliary means when the respective plug-in module is to be replaced.
摘要:
The invention relates to an encapsulated secondary-current-limiting voltage surge diverter based on a spark gap, for low-voltage applications, comprising two main electrodes and with insulating pieces which release gas on temperature loading, whereby one of the main electrodes is at least part of the capsule and/or the spark gap housing. According to the invention, the capsule or the spark gap housing has an essentially elongated parallelepiped form, with an arc chamber and at least two separate expansion chambers embodied in the parallelepiped, such as to extend over the total height of the parallelepiped. The expansion chambers are connected to the arc chamber by means of channels and the arc chamber and the expansion chambers run essentially parallel to each other. The arc chamber is defined in the head region by one of the main electrodes and an insulating piece and, in the opposing base region, is formed by an arc extending piece, electrically connected to the other main electrode. The channels run laterally from the arc extending piece to the expansion chambers. In at least one channel and/or one expansion chamber, further insulating pieces or insulating sections may be provided, which on arcing and temperature rise give off gas to produce a back pressure.
摘要:
The invention relates to a pressure-resistant encapsulated air-gap arrangement for the draining off of damaging perturbances due to overvoltages, comprising at least two essentially opposing electrodes, arranged in a housing which is conducting, or has a conducting coating. Said electrodes are insulated from the housing and a discharge chamber is formed between said electrodes. According to the invention, a trigger voltage may be applied directly, by means of the conducting housing, to form a partial spark, whereby said partial spark can initiate the main spark between the main electrodes.
摘要:
Die Erfindung betrifft eine Überspannungsschutzeinrichtung auf Funkenstreckenbasis, insbesondere für Niederspannungs-Anwendungen, umfassend mindestens zwei in einem druckdichten Gehäuse befindliche Hauptelektroden sowie mindestens eine Zündhilfselektrode, wobei im Gehäusevolumen eine Funktionsbaugruppe zum Reduzieren der Ansprechspannung der Funkenstrecke untergebracht ist, welche mit einer der Hauptelektroden und der Zündhilfselektrode in Verbindung steht. Erfindungsgemäß besteht die Funktionsbaugruppe zum Reduzieren der Ansprechspannung der Funkenstrecke aus einer vollständig in das druckdichte Gehäuse integrierten, außerhalb des Lichtbogen-Brennraums befindlichen Reihenschaltung eines spannungsschaltenden Elements, einer Impedanz und einer Trennstrecke, wobei die Trennstrecke durch den Abstand der Zündhilfselektrode zur nächstliegenden Hauptelektrode gebildet ist. Beim Auftreten einer Überspannung, welche die Summe der Ansprechspannungen des Schaltelements und der Trennstrecke übersteigt, fließt ein Strom von der ersten Hauptelektrode zur zweiten Hauptelektrode, mit der Folge, dass der die Trennstrecke überbrückende Lichtbogen Ladungsträger zur sofortigen Ionisation der Trennstrecke zwischen den Hauptelektroden bereitstellt, wodurch die Spannungsfestigkeit dieser Trennstrecke veringert ist und aufgrund des mit der Stromstärke steigenden Spannungsabfalls an der Impedanz ein Überschreiten der reduzierten Spannungsfestigkeit der Trennstrecke zwischen den Hauptelektroden eintritt, wodurch das gewünschte Zünden der Funkenstrecke erfolgt.
摘要:
The invention relates to a surge protection device comprising at least one surge protection unit, consisting of a substantially U-shaped socket part and a plug part which can be fixed in the socket part and which receives a surge protection means. Insulated electric conductors on or in the socket part are contacted by means of vampire taps or displacing terminals. The surge protection device also comprises openings or perforations formed in the socket part for receiving conductors. According to the invention, the openings are selectively designed so that the electric conductors are inserted into or through the openings, and the openings are exposed in a socket part region which can be covered by the socket part such that cutting surfaces located on the base of the plug part penetrate the conductor insulation during the plug-in process and directly contact the respective conductor.