ELECTROMAGNETIC CONTACTOR

摘要

An extinction cover 5 is mounted on a case 4 thereby sealing an extinction chamber S. This extinction cover has an engaging-force-increased portion 5c1 which strengthens the force of engaging with the case, and an engaging-force-decreased portion 5c2 which weakens the force of engaging with the case; and in response to an increase in internal pressure in the extinction chamber due to arcing gas generation, the engaging-force-decreased portion establishes disengagement of the case and provides a gap 27, formed with the case, for linking the extinction chamber to external air, and the engaging-force-increased portion maintains engagement with the case.