Transient Arc Characteristic of a Commutation Switch Utilizing High Velocity Contact Separation
DOI:
https://doi.org/10.14311/ppt.2023.2.81Keywords:
pyro switch, commutation network, dc arc switching principleAbstract
Commutation circuits are commonly used for low on state resistance and high current interruption capability if this can not be achieved by a single device or single current switching path. In case of fault detection, a very fast commutation of the current from the low-impedance main current path into the parallel high-current interrupting path is necessary. For single usage applications a low-cost approach is the utilization of a pyrotechnical switch in the low-impedance path. Compared to other electromechanical switches, those switches provide very high velocity of contact separation and thus a fast arc voltage rise with short commutation times. Here, measurements of the contact movement of a pyrotechnical switch were carried out using optical high speed imaging and an arc elongation up to 100ms−1 was calculated. From this, transient arc characteristics were measured in a simplified commutation network during the period until current zero in the low-impedance main current path.
References
IEC 61643-11:2011-03. Low-voltage surge protective devices - Part 11: Surge protective devices connected to low-voltage power systems - Requirements and test methods.
Y. Ozaki. Study on the dielectric recovery characteristics of the lightning arresters spark-gaps. ETJ of Japan, 5(3/4):94–97, 1960.
G. Burkhard. Schaltgeräte der Elektroenergietechnik: Grundlagen und technische Ausführung. VEB Verlag Technik, 1985. ISBN 9783800713936.
W. Rieder and P. Sokob. Probleme der Lichtbogen-dynamik: Rasche Strom- und Längenänderungen von Lichtbögen. Scientia Elektrica, 5(3):93–112, 1959.
Downloads
Published
Issue
Section
License
Copyright (c) 2023 C. Drebenstedt, S. Jugelt, K. Schricker, M. Rock
This work is licensed under a Creative Commons Attribution 3.0 Unported License.
Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
