DocumentCode :
298242
Title :
Earth faults during RFX initial operations
Author :
Bellina, Fabrizio ; Chitarin, Giuseppe ; Guarnieri, Massimo ; Stella, Andrea ; Trevisan, Francesco
Author_Institution :
Padova Univ., Italy
Volume :
1
fYear :
1993
fDate :
11-15 Oct 1993
Firstpage :
345
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
Keywords :
fusion reactor operation; fusion reactor safety; plasma instability; plasma probes; reversed field pinch; RFP machine; RFX initial operations; RGM; accidental contacts; accidental earth currents; air-core poloidal windings; earth faults; electrical loops; fast winding protection; first operation phase; machine components; plasma equilibrium distortion; rogowski coil probes; tree-shaped earthing geometry; Contacts; Earth; Geometry; Grounding; Machine components; Machine windings; Phase distortion; Plasmas; Protection; Signal analysis;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Fusion Engineering, 1993., 15th IEEE/NPSS Symposium on
Conference_Location :
Hyannis, MA
Print_ISBN :
0-7803-1412-3
Type :
conf
DOI :
10.1109/FUSION.1993.518346
Filename :
518346
Link To Document :
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