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Development of detection method with a magnetic field sensor for incomplete contact in gas insulated switches and bus connecting parts

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3 Author(s)
Fujinami, H. ; Central Res. Inst. of Electr. Power Ind., Tokyo, Japan ; Takuma, T. ; Kawamoto, T.

This paper describes a detecting method of incomplete contact in gas insulated switches and bus connecting parts. The principle of the method is to measure the change in magnetic field caused by the current distribution at an abnormal contact point. Fundamental studies with small-size bus models have shown that incomplete contact can be reliably detected with an opto-magnetic sensor in the case of aluminum enclosures. A feasibility study was also conducted for a full-scaled 300 kV GIS structure with more realistic incomplete contact conditions

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Power Delivery, IEEE Transactions on  (Volume:10 ,  Issue: 1 )