Operating mechanism for circuit breaker and circuit breaker using the operating mechanism

A technology for operating mechanisms and circuit breakers, which is applied in the direction of contact drive mechanisms, etc., can solve the problems of large maximum torque, poor synchronization, and increased energy consumption of drive motors, so as to reduce moment of inertia and frictional resistance, reduce structural size and Effect of weight and synchronism improvement

CN104134555BActive Publication Date: 2017-06-30STATE GRID CORP OF CHINA +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2017-06-30

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Abstract

The invention relates to an operating mechanism for a circuit breaker and a circuit breaker using the operating mechanism. The operating mechanism for a circuit breaker includes left, middle and right brake lever transmission structures respectively used for transmission connection with corresponding phase opening and closing levers. The transmission structures of the two adjacent brake rods are connected by interphase connecting rods. At least one drive motor is arranged on the left and right sides of the middle brake rod transmission structure. The transmission structure of the brake lever is connected by transmission. The invention provides an operating mechanism for a circuit breaker that can reduce the purchase cost of a driving motor and simultaneously improve the synchronism between the transmission structures of the brake rods of each phase.
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Description

technical field

[0001] The invention relates to the field of circuit breakers, in particular to an operating mechanism for a circuit breaker and a circuit breaker using the operating mechanism. Background technique

[0002] High-voltage circuit breaker is the most important switchgear in the power system. It is responsible for the dual tasks of controlling and protecting the circuit. Its performance is one of the important factors that determine whether the power system can operate safely. All the functions of the high-voltage circuit breaker are reflected in the opening and closing actions of the dynamic and static contacts. The opening and closing actions of the dynamic and static contacts are realized through the operating mechanism, which is an important part of the circuit breaker. It is a key component that determines the performance of the circuit breaker. Its performance directly affects the technical performance of the circuit breaker. Therefore, the working reliabi...

Examples

Embodiment Construction

[0023] An example of a circuit breaker is Figure 2~4 As shown: the circuit breaker in this embodiment is an open circuit breaker, including the operating mechanism and the contact assembly 1 arranged side by side at intervals of three phases. Each contact assembly includes a static contact 3 and a branch with a moving contact 4. Closing lever 10, the operating mechanism includes a left brake lever transmission structure, a middle brake lever transmission structure and a right brake lever transmission structure respectively driving the reciprocating movement of the corresponding phase opening and closing levers, and the left, middle and right brake lever transmission structures are all The crankshaft 8 is connected by the interphase connecting rod 6 between two adjacent brake lever transmission structures. The operating mechanism also includes two drive motors 5 symmetrically arranged on the left and right sides of the middle brake lever transmission structure. The drive motors...