Circuit breaker interlocking device

Abstract

The present invention relates to a breaker interlocking device. It is applicable to mechanical and electric interlocking between two plastic shell breakers in duplicate supply switching device. Said breaker interlocking device includes a mounting base plate and a slide block whose middle portion is easy slide fit on the mounting base plate by means of slide mechanism and whose two ends are extended to the exterior of said mounting base plate. It is characterized by that on the end surface of every end of the above-mentioned slide block a projection is formed respectively, on the mounting base plate are set first signal switch and second signal switch which are correspondent to two projections of said slide block, so that said inter locking device can simultaneously implement mechanical interlocking and electric interlocking.

Description

technical field [0001] The invention belongs to the technical field of electric appliance manufacturing, in particular to a circuit breaker interlocking device, which is suitable for mechanical and electrical interlocking between two molded case circuit breakers in a dual power supply switching device. Background technique [0002] The dual power switching device is used in special power supply and distribution occasions. It usually consists of two molded case circuit breakers used to control the common and standby power sources, the operating mechanism of the circuit breaker, and a switch between the two molded case circuit breakers. The circuit breaker interlocking device used to prevent two power supplies from supplying power at the same time, when the common power supply (generally the mains) stops working, the normal power supply to the backup power supply (generally the mains) is completed manually or electrically within the specified time Generally self-generating) sw...

AI Technical Summary

Problems solved by technology

The applicant finds that there are following defects in this interlocking device: first: since the operating handle of the circuit breaker is located in the groove of the rotating arm, it is easily damaged due to stress concentration during the rotation of the rotating arm, thereby reducing the use of the operating handle of the circuit breaker. In addition, the cooperation between the groove and the flange is prone to "seizure" phenomenon, which affects the reliability of the interlock device

In addition, the Chinese utility model patent authorization announcement number CN2372775Y discloses a rigid mechanical interlocking device for a molded case circuit breaker, which is composed of a base, a slidable clamp, a stopper, a tension spring and other components to form a mechanical interlocking device. In this device, one end of the clamping plate is an inclined surface, and the other end is a vertical surface, and the mechanical interlock is realized by directly contacting the inclined surface or the vertical surface of the clamping plate with the operating handle of the circuit breaker. This structure is compared with the previous patent. , although the phenomenon of "seizure" can be avoided, the problem of stress concentration still exists, so the operating handle of the circuit breaker will also be damaged due to stress concentration, and the reliability of the mechanical interlock device of the circuit breaker will be reduced

In addition, the interlocking device disclosed in the above-mentioned patent documents only focuses on realizing the mechanical interlocking between the circuit breakers, but ignores the synchronous realization of the electrical interlocking between the circuit breakers, and when the mechanical interlocking is used for the electric operating handle of the circuit breaker, It is also necessary to provide electrical interlocking to further provide safety and reliability measures on the basis of mechanical interlocking

In addition, the technical solutions disclosed in the above-mentioned patent documents all directly contact the mechanical interlock device with the operating handle of the circuit breaker, and do not teach the cooperation between the mechanical interlock device and the circuit breaker operating mechanism acting on the operating handle of the circuit breaker. technical inspiration

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