Search

Your search keyword '"Wilkening, Ernst-Dieter"' showing total 11 results
Start Over Author "Wilkening, Ernst-Dieter"
11 results on '"Wilkening, Ernst-Dieter"'

5. Spatial and time characteristics of short gap, high di/dt discharges

Author

Wilkening, Ernst-Dieter and Glinkowski, Mietek

Subjects
Electric currents -- Research, Vacuum switches -- Research, Electric discharges through gases -- Analysis, Business, Chemistry, Electronics, Electronics and electrical industries
Abstract

Under certain network conditions vacuum circuit breakers may generate high frequency currents. The excellent quenching capability of vacuum circuit breakers for line frequency currents as well as for high frequency currents plays an important role in the generation of unwanted voltage transients. This may occur when the gap distance at current zero is still too short to withstand the TRV; in practical applications that is less than a millimeter. This paper describes the results of simulation calculations regarding these phenomena in the vicinity of current zero. Simulations are based on a detailed physical model, taking into consideration the basic conservation laws, the Maxwell equations and the current continuity. The numerical solution takes into account the results of experimental streak photographs, revealing that the visible discharge covers only a small part of the contact diameter. The calculations were made by the Department of Electric Power Engineering, Rensselear Polytechnic Institute, the experiments were carried out at the Institut fur Elektrische Energieanlagen, Technische Universitat Braunschweig.

Published
1993

6. Switching characteristics of hybrid low voltage DC circuit breakers

Author

Alija, Muhamet, Wilkening, Ernst-Dieter, Kopp, Tobias, Kurrat, Michael, and 22nd International Conference on Gas Discharges and Their Applications, Novi Sad, Serbia, 2.- 7. September 2018

Subjects
DC current interruption, Hybrid low voltage DC circuit breaker, Mechanical circuit breaker, DC current interruption, Hybrid low voltage DC circuit breaker, Mechanical circuit breaker -- Switching behaviour mechanical circuit breaker -- Switching arc, ddc:621.3, Switching arc, ddc:6, Veröffentlichung der TU Braunschweig, ddc:621, ddc:62, Switching behaviour mechanical circuit breaker, Article, 621.3
Abstract

For a secure and reliable operation circuit breakers (CB’s) are key components in the power grid. Facing the upcoming developments in the power grid with integration of DC technologies, hybrid circuit breakers (HCB’s) will play an important role. Studies on HCB’s for low voltage applications shows promising results regarding to the proof of this concept for switching devices. In this study experiments on a mechanical circuit breaker (MCB) as a part of a HCB for DC interruption in low voltage applications are presented. The measurment setup and procedure are presented. Hence, the switching behaviour of the MCB for three different test currents is studied. It has been found, that the proposed MCB can interrupt DC currents within the range of 200 A to 600 A., Proceedings of the 22nd International Conference on Gas Discharges and Their Applications, vol. 2, p. 611

Published
2018
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results