Double-break circuit breaker

Abstract

The invention discloses a double-break circuit breaker comprising a shell which is internally provided with a rotating shaft and a tripping mechanism which is used for driving the rotating shaft to rotate. The shell is also internally provided with multiple sets of double-break structures. Each set of double-break structure comprises two static contacts and two moving contacts. The two moving contacts are arranged side by side. The position, which is corresponding to each set of double-break structure, of the rotating shaft is provided with a concave cavity. One end of each of the two moving contacts stretches into the concave cavity of the rotating shaft. The end parts of the ends, which are positioned in the concave cavity of the rotating shaft, of the two moving contacts are electrically connected via a flexible conductive member. A moving contact point is fixed on the other end, which is positioned outside the concave cavity of the rotating shaft, of each of the two moving contacts. A static contact point is fixed on the internal ends of the two static contacts respectively. One-to-one correspondence suction closing can be formed by the two moving contact points on the two moving contacts and the two static contact points on the two static contacts. With application of the aforementioned arrangement, the invention provides the double-break circuit breaker which can effectively enhance breaking capacity without increasing the size of the shell of the circuit breaker.

Description

technical field [0001] The invention relates to a circuit breaker, in particular to a double break point circuit breaker. Background technique [0002] A double-breakpoint circuit breaker is a circuit breaker with a double-breakpoint structure. In the prior art, the double-breakpoint structure, as described in document CN201010210945. There are two static contacts, each of which is provided with a static contact, and the two movable contacts which can form one-to-one correspondence with the two static contacts are respectively arranged on the strip-shaped movable contact. On both ends of the head, such a structural setting, in order to take into account that the dynamic and static contacts at both ends can be effectively opened and closed, the actual contact opening distance of the circuit breaker is relatively small, especially when the circuit breaker is used in a DC circuit It will be difficult to cut off the arc; and if a larger contact spacing is to be maintained, the ...

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Problems solved by technology

[0002] A double-breakpoint circuit breaker is a circuit breaker with a double-breakpoint structure. In the prior art, the double-breakpoint structure, as described in document CN201010210945. There are two static contacts, each of which is provided with a static contact, and the two movable contacts which can form one-to-one correspondence with the two static contacts are respectively arranged on the strip-shaped movable contact. On both ends of the head, such a structural setting, in order to take into account that the dynamic and static contacts at both ends can be effectively opened and closed, the actual contact opening distance of the circuit breaker is relatively small, especially when the circuit breaker is used in a DC circuit It will be difficult to cut off the arc; and if a large contact distance is to be maintained, the housing of the circuit breaker must be made very large, which greatly increases the production cost

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