Circuit arrangement for electronically actuating a triggerable surge arrester
A technology of circuit arrangement, discharger, applied in the direction of emergency protection circuit devices for limiting overcurrent/overvoltage, circuits dedicated to spark gaps, circuit devices, etc., capable of solving insufficient protection levels, unable to exclude downstream connections electronic components hazards and other issues
Active Publication Date: 2020-07-03
デーンエスエープルスツェオーカーゲー
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- Application Information
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Problems solved by technology
[0006] For many practical applications, the present protection levels have proven to be insufficient, so that a risk to downstream connected electronic components cannot be ruled out
Method used
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[0028] specific implementation plan
[0029] The circuit arrangement shown in the drawing is implemented as an active circuit comprising fast-switching semiconductor elements which are connected to trigger inputs of corresponding surge arresters. The corresponding semiconductor components or power semiconductors are operated via the control and evaluation unit. The control and evaluation unit comprises a pulse detection stage 1 and a microcontroller 2 . The microcontroller 2 is connected to a voltage supply 3 which is applied to a low voltage network 4 .
[0030] The microcontroller 2 is connected on the output side to the controller input of the semiconductor switch 5 .
[0031] according to figure 1 The semiconductor switch 5 is connected to the trigger input 7 of the spark gap 8 via an assembly for a pulse rectifier 6 , which acts as a fast-switching rectifier.
[0032] Main electrodes 9 and 10 of spark gap 8 are likewise connected to network 4 and to consumers 11 to be...
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The invention relates to a circuit arrangement for electronically actuating a triggerable surge arrester, such as a spark gap, multi-electrode gas arrester or the like, in which at least one power semiconductor is controlled by a The converter stage is activated and the power semiconductors are connected on the output side to the trigger input of the surge arrester. According to the invention, the switching stage is designed as a control and evaluation unit for detecting transient overvoltage events, and the switching stage firstly has a pulse detection stage which enables pulse detection in a level-sensitive or gradient-dependent manner, And the conversion stage secondarily has a microcontroller or similar for event evaluation. The microcontroller is routed on the output side to control inputs of the power semiconductors. A fast-switching rectifier is provided between the output of the power semiconductor and the trigger input of the surge arrester.
Description
technical field [0001] The invention relates to a circuit arrangement for electronically actuating a triggerable surge arrester, such as a spark gap, multi-electrode gas arrester or similar, wherein at least one power The semiconductor is activated by the converter stage and the power semiconductor is connected on the output side to the trigger input of the surge arrester. Background technique [0002] In order to dissipate high pulse currents, in particular in the event of a direct lightning strike, surge protectors, typically surge arresters based on spark gap technology or also gas arresters, are used in a known manner. The disadvantage is that the response voltage in the spark gap is usually high, because the spark discharge and ionization between the electrodes of the spark gap must first be caused by the application of an overvoltage and thereafter a voltage gradient-dependent response occurs, which In case of high steepness results in a higher protection level. For ...
Claims
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IPC IPC(8): H01T2/02H01T15/00H02H9/06
CPCH01T2/02H01T15/00H02H9/06H03K5/24H02H1/0007H02H9/005
Inventor T·伯姆J·施皮斯F·朔尔克R·布罗克
Owner デーンエスエープルスツェオーカーゲー