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A diagnostic system for electrical faults in a high current discharge plasma setup

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4 Author(s)
Nigam, S. ; Raja Ramanna Centre for Advanced Technology, Indore 452013, India ; Aneesh, K. ; Navathe, C. P. ; Gupta, P. D.

Your organization might have access to this article on the publisher's site. To check, click on this link:http://dx.doi.org/+10.1063/1.3534079 

A diagnostic system to detect electrical faults inside a coaxial high current discharge device is presented here. This technique utilizes two biconical antennas picking up electromagnetic radiation from the discharge device, a voltage divider sensing input voltage, and a Rogowski coil measuring the main discharge current. A computer program then analyses frequency components in these signals and provides information as to whether the discharge event was normal or any breakdown fault occurred inside the coaxial device. The diagnostic system is developed for a 450 kV and 50 kA capillary discharge plasma setup. For the setup various possible faults are analyzed by electrical simulation, followed by experimental results. In the case of normal discharge through the capillary load the dominant frequency is ∼4 MHz. Under faulty conditions, the peak in magnitude versus frequency plot of the antenna signal changes according to the fault position which involves different paths causing variation in the equivalent circuit elements.

Published in:

Review of Scientific Instruments  (Volume:82 ,  Issue: 2 )

Date of Publication:

Feb 2011

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