TY - JOUR
A1 - Kern, Alexander
A1 - Zischank, Wolfgang J.
A1 - Heidler, Fridolin
A1 - Wiesinger, J. [u.a.]
T1 - Shielding effectiveness of reinforced concrete cable ducts carrying partial lightning currents
JF - Conference proceedings : 14th - 18th September 1998, [Burlington Hotel, Birmingham, United Kingdom] / organised by: School of Engineering and Advanced Technology, Staffordshire University, United Kingdom
Y1 - 1998
N1 - International Conference on Lightning Protection <24, 1998, Birmingham> ; School of Engineering and Advanced Technology ; ICLP <4, 1998, Birmingham>
CY - Birmingham
ER -
TY - JOUR
A1 - Zischank, Wolfgang J.
A1 - Heidler, Fridolin
A1 - Wiesinger, J.
A1 - Metwally, I.
A1 - Kern, Alexander
A1 - Seevers, M.
T1 - Laboratory simulation of direct lightning strokes to a modeled building : measurement of magnetic fields and included voltages
JF - Journal of electrostatics. 60 (2004), H. 2 - 4
Y1 - 2004
SN - 0304-3886
N1 - ISSN der E-Ausg.: 0304-3886
SP - 223
EP - 232
ER -
TY - JOUR
A1 - Kern, Alexander
A1 - Heidler, Fridolin
A1 - Zischank, Wolfgang J.
A1 - Frentzel, Ralf
T1 - Lightning current distribution and coupling to control cables in power plants or large industrial facilites
Y1 - 2002
N1 - International Conference on Grounding and Earthing <2002, Rio de Janeiro>
ER -
TY - JOUR
A1 - Kern, Alexander
A1 - Heidler, Fridolin
A1 - Zahlmann, P.
A1 - Zischank, Wolfgang J.
T1 - Blitzschutz
JF - ETZ : Elektrotechnik + Automation. 114 (1993), H. 2
Y1 - 1993
SN - 0170-1711
N1 - 2. ISSN: 0948-7387
ER -
TY - CHAP
A1 - Zischank, Wolfgang J.
A1 - Kern, Alexander
A1 - Frentzel, Ralf
A1 - Heidler, Fridolin
A1 - Seevers, M.
T1 - Assessment of the lightning transient coupling to control cables interconnecting structures in large industrial facilities and power plants
N2 - Large industrial facilities and power plants often require a huge number fo information and control cables between the differnet structures. These I&C-cables can be routed in reinforced concrete cable ducts or in isolated buried cable runs. KTA 2206 is the German lightning protection standard for nuclear power plants. During the last several years considerable effort has been made to revise this standard. Despite the well established principles and design guidelines for the construction of the lightning protection system, this standard puts special emphasis on the coupling of transient overvoltages to I&C-cables.
KW - Blitzschutz
KW - Elektromagnetische Kopplung
KW - Überspannung
KW - Kraftwerke
KW - Industrieanlagen
KW - Lightning
KW - current distribution
KW - electromagnetic coupling
KW - overvoltages
Y1 - 2000
ER -
TY - CHAP
A1 - Kern, Alexander
A1 - Heidler, Fridolin
A1 - Seevers, M.
A1 - Zischank, Wolfgang J.
T1 - Magnetic Fields and Induced Voltages in case of a Direct Strike - Comparison of Results obtained from Measurements at a Scaled Building to those of IEC 62305-4
N2 - In the paper the results obtained from experiments at a modelled reinforced building in case of a direct lightning strike are compared with calculations. The comparison includes peak values of the magnetic field Hmax, its derivative (dH/dt)max and of induced voltages umax in typical cable routings. The experiments are performed at a 1:6 scaled building and the results are extrapolated using the similarity relations theory. The calculations are based on the approximate formulae given in IEC 62305-4 and have to be supplemented by a rough estimation of the additional shielding effect of a second reinforcement layer. The comparison shows, that the measured peak values of the magnetic field and its derivative are mostly lower than the calculated. The induced voltages are in good agreement. Hence, calculations of the induced voltages based on IEC 62305-4 are a good method for lightning protection studies of buildings, where the reinforcement is used as a grid-like electromagnetic shield.
N2 - Auswirkungen eines direkten Blitzeinschlages auf ein Gebäude, Vergleich von experimentellen Ergebnissen und Berechnungen basierend auf einer Formel aus der IEC 62305-4
KW - Blitz
KW - Direkter Blitzschlag
KW - Elektromagnetischer Schutzschild
KW - Magnetische Felder
KW - Induzierte Spannungen
KW - Kalkulation
KW - Direct lightning strike
KW - electromagnetic shield
KW - magnetic fields
KW - induced voltages
KW - calculations
Y1 - 2004
SN - 0304-3886
N1 - Journal of electrostatics: Beitr. auf S. 379 - 385. doi:10.1016/j.elstat.2006.09.004
ER -
TY - CHAP
A1 - Zischank, Wolfgang J.
A1 - Heidler, Fridolin
A1 - Wiesinger, J.
A1 - Stimper, K.
A1 - Kern, Alexander
A1 - Seevers, M.
T1 - Magnetic Fields and Induced Voltages inside LPZ 1 Measured at a 1:6 Scale Model Building
N2 - Laborexperimente zu Blitzschutzzonen in Stahlbetongebäuden anhand eines Modells im Maßstab 1:6
N2 - For the application of the concept of Lightning Protection Zones (LPZ), the knowledge of the magnetic fields and induced voltages inside a structure is necessary. Laboratory experiments have been conducted at a downscaled model of a building (scale factor 1:6) to determine these electromagnetic quantities in case of a direct strike to the structure. The model (3 m x 2 m x 2 m) represented a small industrial building using the reinforcement of the concrete as electromagnetic shield. The magnetic fields and magnetic field derivatives were measured at several location inside the scaled model. Further, the voltages induced on three typical cable routes inside the model was determined. The influence of the lightning current waveshape, point-of-strike, bonding of the cable routes, and bridging of an expansion joint in the middle of the building on these quantities was studied.
KW - Blitzschlag
KW - Elektromagnetischer Schutzschild
KW - Stahlbeton
KW - Maßstabsgetreues Modell
KW - Lightning
KW - electromagnetic shielding
KW - reinforced concrete
KW - scaled model
Y1 - 2004
ER -
TY - CHAP
A1 - Zischank, Wolfgang J.
A1 - Heidler, Fridolin
A1 - Kern, Alexander
A1 - Metwally, I. A.
A1 - Wiesinger, J.
A1 - Seevers, M.
T1 - Laboratory simulation of direct lightning strokes to a modelled building - measurement of magnetic fields and induced voltages
N2 - In IEC 61312-2 equations for the assessment of the magnetic fields inside structures due to a direct lightning strike are given. These equations are based on computer simulations for shields consisting of a single-layer steel grid of a given mesh width. Real constructions, however, contain at least two layers of reinforcement steel grids. The objective of this study was to experimentally determine the additional shielding effectiveness of a second reinforcement layer compared to a single-layer grid. To this end, simulated structures were set up in the high current laboratory. The structures consisted of cubic cages of 2 m side length with one or with two reinforcement grids, respectively. The structures were exposed to direct lightning currents representing the variety of anticipated lightning current waveforms. The magnetic fields and their derivatives at several positions inside the structure as well as the voltage between “floor” and “roof” in the center were determined for different current injection points. From these data the improvement of the shielding caused by a second reinforcement layer is derived.
KW - Direkter Blitzschlag
KW - Elektromagnetischer Schutzschild
KW - Magnetische Felder
KW - Induzierte Spannungen
KW - Stahlbetonkonstruktion
KW - Lightning
KW - electromagnetic shielding
KW - magnetic field
KW - reinforced concrete
KW - induced voltage
Y1 - 2002
ER -