Title :
Transfer impedance measurement of a 19"-subrack
Author :
Bernauer, J. ; Schwab, A.J.
Author_Institution :
Inst. of Electr. Energy Syst. & High-Voltage Technol., Karlsruhe Univ., Germany
Abstract :
The transfer impedance of a 19"-aluminum subrack has been measured by injecting a current into the shield surface and measuring the voltage across the inner surface between the injection points. The measurements were performed in the frequency range from dc up to 30 MHz. With two different set-ups, the influence of the current return path was examined. The surface transfer impedance depends strongly on the mounting conditions of the basic unit (side plates and horizontal rails) and the covers. The interference currents were symmetrically injected into opposite shield surfaces in x, y and z-direction
Keywords :
electric impedance measurement; electromagnetic interference; electromagnetic shielding; 0 Hz to 30 MHz; 19"-aluminum subrack; current return path; horizontal rails; interference currents; mounting conditions; opposite shield surfaces; shield surface; shielding enclosures; side plates; surface transfer impedance; transfer impedance measurement; voltage measurement; Coaxial components; Conducting materials; Eddy currents; Fasteners; Impedance measurement; Interference; Rails; Strips; Surface impedance; Voltage measurement;
Conference_Titel :
Electromagnetic Compatibility, 1996. Symposium Record. IEEE 1996 International Symposium on
Conference_Location :
Santa Clara, CA
Print_ISBN :
0-7803-3207-5
DOI :
10.1109/ISEMC.1996.561258