| 摘要 |
<p>PURPOSE:To make it possible to simplify the structure and to cut down the cost by a method wherein an annular current transformer, to be used for detection of ground fault current, is inserted into the upper arcing horn, and the end part of the fittings of the current transformer is fixed to the upper horm fitting or the upper arcing horn. CONSTITUTION:A current transformer 15 is inserted from its tip side into the upper arcing horn 11, the inside bolt 12 of a pair of bolts 12, used to fix to the upper horn mounting metal fitting 4, is loosened, the tip part 19b of a current transformer mounting metal fitting 16, extending from above the current transformer 15, is connected to the base end mounting part 11a, and the bolt 12 is inserted into the recessed part 20 of the tip part 19a. At this time, the engaging piece 21 of the tip part 19b of the current transformer mounting fitting 16 is engaged to both side faces of the base end mounting part 11a of the upper arcing horn 11, and the current transformer mounting fitting 16 is fastened to the upper arcing horn 11 with a lock nut. The bolt 12 is tightened in the above-mentioned state, and the current transformer mounting fitting 16 is fixed to the base end mounting part 11a of the upper arcing horn 11.</p> |
