Influence of line routing and terminations on transient overvoltages in LV power installations

I. A. Metwally, F. Heidler

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

Surge protective devices (SPDs) are installed at the boundaries of lightning protection zones (LPZs) to damp the surges to the protection level of the SPD. If the circuit between the SPD and the apparatus to be protected is too long, the propagation of the surges leads to oscillation phenomenon. In this case, the overvoltage can be increased at the apparatus terminals. The increase is taken into account by an enhancement factor which gives the ratio of the maximum overvoltage at the apparatus terminals to the SPD protective level. According to IEC 62305-4, the maximum enhancement factor is considered to be equal to two in the worst case of open-circuit condition. The objective of the present paper is to check this relation for equipment connected to low-voltage (LV) power system. The LV power system is considered as TN-S system with different routings in a three-storey building. The terminals of apparatus are substituted by different loads. All Maxwell's equations are solved by the method of moments and the voltage is calculated at the apparatus terminals. The SPD itself is simulated by a voltage source at the ground floor of the building. The results reveal that the apparatus terminal voltage may overshoot the SPD protection level by a factor of 3.

Original languageEnglish
Title of host publicationProceedings of the 18th International Zurich Symposium on Electromagnetic Compatibility, EMC
Pages313-316
Number of pages4
DOIs
Publication statusPublished - 2007
Event18th International Zurich Symposium on Electromagnetic Compatibility, EMC - Munich, Germany
Duration: Sep 24 2007Sep 28 2007

Other

Other18th International Zurich Symposium on Electromagnetic Compatibility, EMC
CountryGermany
CityMunich
Period9/24/079/28/07

Fingerprint

Electric potential
Lightning protection
Networks (circuits)
Maxwell equations
Method of moments

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Metwally, I. A., & Heidler, F. (2007). Influence of line routing and terminations on transient overvoltages in LV power installations. In Proceedings of the 18th International Zurich Symposium on Electromagnetic Compatibility, EMC (pp. 313-316). [4388258] https://doi.org/10.1109/EMCZUR.2007.4388258

Influence of line routing and terminations on transient overvoltages in LV power installations. / Metwally, I. A.; Heidler, F.

Proceedings of the 18th International Zurich Symposium on Electromagnetic Compatibility, EMC. 2007. p. 313-316 4388258.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Metwally, IA & Heidler, F 2007, Influence of line routing and terminations on transient overvoltages in LV power installations. in Proceedings of the 18th International Zurich Symposium on Electromagnetic Compatibility, EMC., 4388258, pp. 313-316, 18th International Zurich Symposium on Electromagnetic Compatibility, EMC, Munich, Germany, 9/24/07. https://doi.org/10.1109/EMCZUR.2007.4388258
Metwally IA, Heidler F. Influence of line routing and terminations on transient overvoltages in LV power installations. In Proceedings of the 18th International Zurich Symposium on Electromagnetic Compatibility, EMC. 2007. p. 313-316. 4388258 https://doi.org/10.1109/EMCZUR.2007.4388258
Metwally, I. A. ; Heidler, F. / Influence of line routing and terminations on transient overvoltages in LV power installations. Proceedings of the 18th International Zurich Symposium on Electromagnetic Compatibility, EMC. 2007. pp. 313-316
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