| 摘要 |
PROBLEM TO BE SOLVED: To obtain a breaker facilitating the replacement and maintenance of a damaged and fouled portion at the inside of an arc-extinguishing chamber.SOLUTION: A breaker includes a pair of shielding side plates 17 equipped so as to be freely loaded and unloaded in and from an arc-extinguishing chamber 1 through a through hole 1A provided to an outer wall of the arc-extinguishing chamber, and preventing an arc generated during a shutoff operation from blowing out to both sides, the shielding side plates 17 being allowed to be replaced freely. Each shielding side plate 17 is provided with an engaging projection 17a at an outer end thereof and a band-like projection 17b on a longitudinal side face thereof, for positioning the shielding side plate 17. |
