Determination of multicomponent media permittivity by high-frequency method

Большунова, О. М.; Korzhev, A A; Vatlina, A. M.; Kamyshyan, A. M.

doi:10.1088/1755-1315/194/6/062004

Cited by 4 publications

(2 citation statements)

References 4 publications

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“…Several electrode prototypes were studied: uncoated copper electrode, electrode with CuC coating in argon and electrode samples obtained using different fractions of CuC (95/5 by volume) powder material deposited in air plasma. A feature of the last electrodes is a high content of copper oxides in the coating [13].…”

Section: Methodsmentioning

confidence: 99%

“…This layer has a porous structure and contains inclusions of copper oxides. The resulting electrodes have the best arc-resistant properties [13] due to the presence of the refractory phase and copper oxides with their significantly lower thermal conductivity compared to copper. For the manufacture of a contact layer from powder materials on a copper basis, the method of plasma-arc spraying was used, which allows the formation of a contact layer directly on the current leads.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of the Transient Contact Resistance of Composite Copper-Graphite Material Obtained Using Plasma Spraying Technology

Derevyankin

Frolov

2021

MSF

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The article is devoted to the analysis of the internal structure and properties of a copper-graphite coating applied to a copper electrode. The article provides a calculation of the transient contact resistance of electrodes with a coating obtained using plasma spraying technology. Copper-graphite powder with high arc resistance was used as a spraying substance. Coated electrodes were tested for erosion resistance by an arc at currents of several kiloamperes. The aim of the work is to determine the effect of the composition and internal structure of the coating on the transient processes in the contact gap.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analysis of the Transient Contact Resistance of Composite Copper-Graphite Material Obtained Using Plasma Spraying Technology

Derevyankin

Frolov

2021

MSF

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Vacuum contactor operation with parallel connection of independent consumers

Belsky

2021

J. Phys.: Conf. Ser.

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This work presents a model of a transformer substation with parallel connection of independent consumers via vacuum switches. Several options of an electric arc model are considered upon switching off a vacuum switch such as: KEMA model and “black box” model. Modern computer models of vacuum switches were analyzed. Since the model data were not suitable for the conditions of the experiment, a simulation computer model was developed that reflects the specifics of the operation of the substation and of the transition process upon disconnection of one or several vacuum switches. The results of the developed methodology of analyzing transition processes were verified. To check the results of computer simulation, an experimental model was constructed, it consisted of: an electric load (inductive nature), a power supply, two vacuum switches, and a measuring circuit. The circuit is switched on and off using a pneumatic system controlled by a microcontroller. The primary purpose of the work is to check mutual influence of vacuum switches upon parallel disconnection, since there may be a restrike caused by effects of switching overvoltage between neighboring switches upon irregular disconnection. The effects of a transition process in one switch on the total current of the entire system were identified. A stand for a projected trial was demonstrated as well.

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