VACUUM BULB, VACUUM BREAKER, VACUUM DISCONNECTOR, AND RECEIVING AND DISTRIBUTION APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide a compact vacuum bulb with improved insulation performance and excellent reliability. SOLUTION: This vacuum bulb has a pair of detachable electrodes, comprising a fixing side electrode 5a and a moving side electrode 5b, and an arc shield 13 enclosing the pair of electrodes in a vacuum container 1. In this case, a insulating rod 9 is inserted between a current carrying shaft (moving side current carrying shaft) 4b connected with the moving side electrode 5b and a bellows 11 which movably supports the moving side electrode 5b in an axial direction, and a moving side drawing electrode 8b placed on the side of the vacuum container 1 and the moving side current carrying shaft 4b are connected by an expandable conductor 7.