BREAKER FACILITATING RAPID MOVEMENT AND ELONGATION OF ARC

摘要

A breaker comprises a static contact, a moving contact, and an arc-extinguishing chamber. A contact surface of an electrical contact of the static contact and an electrical contact of the moving contact and a bottom plane of a base form an acute angle that is located in the first quadrant. The moving contact comprises a conducting rod having a projecting portion, and the electrical contact which is welded on an end surface of the projecting portion in a direction facing the electrical contact of the static contact. A bottom arc-ignition grid plate on the bottom of the arc-extinguishing chamber is arranged lower than the electrical contact of the static contact. A top arc-ignition grid plate on the top of the arc-extinguishing chamber is arranged higher than the maximum position of the electrical contact of the moving contact when the moving contact is opened.

主权项

1. A breaker for facilitating rapid movement and elongation of an arc, comprising a base, a fixed contact, an arc extinguishing chamber, a movable contact and an operating mechanism, wherein the arc extinguishing chamber is located on the left side of the movable contact, and the operating mechanism controls connection/disconnection of the movable contact and the fixed contact, wherein:
the fixed contact comprises a conductive substrate, an arc ignition portion and an electric contact, the arc ignition portion and the electric contact are fixed on a connection surface, and the connection surface forms an acute angle which is located in a first quadrant relative to a bottom plane of the base; and the movable contact comprises a conductive rod provided with a projection portion, and an electric contact welded on an end face of the projection portion and towards the electric contact of the fixed contact.