RFX, the largest RFP machine, has air-core poloidal windings. A tree-shaped earthing geometry has been adopted for all the machine components, to avoid electrical loops. Nevertheless, during the first operation phase a number of accidental contacts occurred, which caused loops currents high enough to distort plasma equilibrium. These loops could be detected by means of RGM, a system designed to perform fast winding protection, but able to detect accidental earth currents as well. After careful analyses of the signals, these earth faults were always located and removed. The use of a compass resulted particularly useful in the occasion of a number of these faults, the others were detected by means of Rogowski coil probes.

Earth Fault During RFX Initial Operations

CHITARIN, GIUSEPPE;GUARNIERI, MASSIMO;STELLA, ANDREA;
1994

Abstract

RFX, the largest RFP machine, has air-core poloidal windings. A tree-shaped earthing geometry has been adopted for all the machine components, to avoid electrical loops. Nevertheless, during the first operation phase a number of accidental contacts occurred, which caused loops currents high enough to distort plasma equilibrium. These loops could be detected by means of RGM, a system designed to perform fast winding protection, but able to detect accidental earth currents as well. After careful analyses of the signals, these earth faults were always located and removed. The use of a compass resulted particularly useful in the occasion of a number of these faults, the others were detected by means of Rogowski coil probes.
1994
Proceedings of the 15th SOFE - Symposium On Fusion Engineering ‘93
15th SOFE - Symposium On Fusion Engineering ‘93
0780314131
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11577/175344
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