Low-voltage large-current vacuum arc extinguishing chamber

The invention relates to a low-voltage large-current vacuum arc extinguishing chamber and belongs to a power part; the low-voltage large-current vacuum arc extinguishing chamber comprises a conduction block, a cover plate, a shielding cylinder, a porcelain shell, a contact, a corrugated pipe and a movable conduction rod; the low-voltage large-current vacuum arc extinguishing chamber is characterized in that the shielding cylinder is an inbuilt type shielding cylinder which is positioned at the inner side of the porcelain shell; the contact has a transverse magnetic structure; and an upper contact and a lower contact of the contact are respectively and directly connected with the conduction block and the conduction rod. The low-voltage large-current vacuum arc extinguishing chamber has small volume, large rated current and strong short-circuit breaking capacity.