An investigation of the protection performances for current-limiting fuses using stainless steel wires
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Publication Details
Author list: Mungkung N., Arunrungrusmi S., Yuji T.
Publisher: Hindawi
Publication year: 2011
Start page: 277
End page: 282
Number of pages: 6
ISBN: 9789604742769
eISSN: 1745-4557
Languages: English-Great Britain (EN-GB)
Abstract
Recently, owing to a high demand of and high dependence on electric power, the reliability of the distribution voltage of electric power systems has become more important. 22 kV high voltage cutout fuses have been used widely, but some melting accidents have occurred due to pollution/contamination of bushings. As the number of contaminants in bushings increases, the electric fields on the fuse element surface rise to a critical level, triggering corona discharge. A fuse element material that is more resistant to corona discharge than the Ag element is desired. A new type of current-limiting fuse made of stainless steel wires, which is low-cost and simple in design has been developed. Characteristics tests, including a blocking test with a high surge current when a voltage is applied, have been conducted. Using a model fuse, it was confirmed that this new type of fuse possesses similar performance characteristics to those with an Ag element.
Keywords
22kV high voltage cutout, Arc extinguishing tube, Large current breaking test, Stainless steel wire
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