| 摘要 |
PROBLEM TO BE SOLVED: To provide a small-sized high voltage circuit breaker with large capacity, of which rated current is increased in coping with recent requirement of a power system, which can have large capacity and capable of being used in high voltage. SOLUTION: First, a third switching part 3 is opened, and a current to be broken is made to flow through a serial connection part of a first switching part 1 and a second switching part 2. Next, the current is broken by separating electrodes of a vacuum breaking part constituting the first switching part 1 from each other with a prescribed distance, and it is made to withstand transient oscillatory voltage impressed between the electrodes. Afterwards, for example, after a maximum arc period after the distance between the electrodes of the first switching part 1 gets into a prescribed distance, the second switching part 2 is opened, and made to withstand the more severe impulse voltage. COPYRIGHT: (C)2006,JPO&NCIPI |
