VACUUM POWER INTERRUPTING DEVICE

摘要

A vacuum power interrupting device comprises a disk-shaped supporting block (4) of a synthetic insulating resin in which the vacuum interrupter (3) is molded, a stationary electrode (23) connected to a stationary contact rod disposed within the vacuum interrupter, and a tubular insulating barrier (31) integrally formed with the supporting block so as to surround the stationary electrode. The vacuum power interrupting device further comprises an electromagnet supported by a plurality of supporting poles (47a, 47b) extending along the outer circumferential surface of the supporting block and an armature member (44) of a magnetic material responsive to the electromagnet and supported by an insulating rod (43) connected to the movable contact rod. Thus, the armature member is in contact with or away from an iron core (52) of the electromagnet in accordance with the energized or deenergized condition of the electromagnet to bring the vacuum interrupter (3) into an interrupted condition or a closed condition.