Abstract
The paper demonstrates the results of TDIl-200k/25SN-P pseudospark switch (PSS) developed by Russian company "Pulsed Technologies Ltd" application. PSS was used in pulsed power unit intended for electric-discharge fracture of rocks and concrete blocks and splitting off from monolith. The pulsed power unit has a pulse current generator with the capacity of 560 μF, stored energy of up to 63 kJ, operating voltage of up to15 kV, current pulse amplitude of up to 200 kA and pulse duration more than 200 μsec. The study also shows the current waveforms determined in the short-circuit experiment of the pulse current generator and in the experiments of the electric-discharge fragmentation of concrete at the charging voltage of 13 kV. PSS was operated in ringing single-pulse mode with the exceedance of more than two maximum permissible parameters: current pulse amplitude, current pulse duration and maximum pulse energy. Internal electrode erosion of PSS is shown and possible reasons of asymmetric current feed are discussed.
Highlights
The recent decades demonstrate increasingly growing interest to the development of new environmentally friendly technologies, which is due to severe complication of environmental problems
In order to increase the efficiency of power transmission and reduce resistive losses in discharge circuit, the high-voltage trigatron switch was replaced by TDI1-200k/25SN-P thyratron
We have replaced the high-voltage trigatron switch that was implemented in the mobile electricdischarge blasting unit for splitting and breaking rocks and concrete blocks by TDI1-200k/25SN-P pseudospark switch
Summary
The recent decades demonstrate increasingly growing interest to the development of new environmentally friendly technologies, which is due to severe complication of environmental problems. The green technologies are preferred, even though they are less effective than conventional technologies. Such technologies are especially in demand, if their usage reduces the amount of manual labor and operating staff risks. Electric-discharge technologies are considered to be a promising option for their application to various processes in mining and building industry. The development of electric-discharge technologies and their successful application in industry depend on the availability of durable, reliable and affordable equipment and its components. A highvoltage switch is one of the basic component in the majority of electric-discharge facilities. The article describes the experience of pseudospark TDI-type switch operation that was developed by the Russian innovation-industrial company “Pulsed Technologies Ltd”.
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