Switch operating mechanism and circuit breaker

Abstract

The invention discloses a switch operating mechanism and a circuit breaker. The switch operating mechanism comprises the components of a housing, a driving unit which is arranged in the housing, a transmission gear which is transmissbly connected with the driving unit, a lever which is transmissbily connected with the transmission gear, an energy storage unit which is transmissbly connected with the transmission gear, and a transmission unit which is transmissbly connected with the energy storage unit. The driving unit drives the energy storage unit to rotate for storing energy through making the transmission gear rotate. After the stored energy of the energy storage unit is reached, the stored energy is released, thereby driving the transmission unit to rotate. The transmission unit makes a circuit breaker body handle rotate in a switching-on direction for making the circuit breaker body perform switching on. The driving unit drives the energy storage unit to reset through driving the transmission gear to rotate reversely. After the energy storage unit is reset, the driving unit continuously performs reversal rotation and drives a lever to rotate, and the lever compresses a limiting member so that the circuit breaker body is released and inhibits switching-on of the circuit breaker body. The switch operating mechanism and the circuit breaker can be used for automatic switching-on and releasing operations of the circuit breaker body and furthermore has high reliability and high safety.

Description

technical field [0001] The invention relates to the field of circuit breakers, in particular to a switch operating mechanism and a circuit breaker. Background technique [0002] According to the requirements of the State Grid, in the line of the prepaid meter, a small smart circuit breaker is required to be installed in the lower line of the smart meter, which is called an external circuit breaker for the electric energy meter, and is used for cost control, line protection and automatic reclosing. When the user's meter is in arrears, the miniature circuit breaker can automatically disconnect the line. Before the user continues to pay the electricity fee, if the handle is manually turned on, the handle will be moved to the closing position, but the circuit breaker contact is still disconnected. position, and the handle will automatically reset to the opening position, and the user cannot take power by himself. Only when the user renews the fee, the small intelligent circuit ...

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Problems solved by technology

[0003] At the same time, the standard requires that during the closing process of the intelligent circuit breaker, only the moving contact of the circuit breaker is allowed to be in the closed or maximum open position, so as to avoid the sudden power failure of the circuit or the failure of the parts of the reclosing module during the closing process of the circuit breaker. The moving contact of the circuit breaker stops at the middle position, because when the moving contact stays at the middle position, the electrical gap between the moving and static contacts may be much smaller than the maximum opening distance of the contacts. , There is a risk of breakdown in the static contact, and at the same time, there is a possibility of connection at the inlet and outlet terminals of the circuit breaker, which brings potential safety hazards

[0004] Chinese patent CN201420506972.3 discloses a reclosing device for a circuit breaker. According to the recently revised standards of the State Grid, this patent has the following defects: First, during the automatic reclosing process, the moving contact can stop at closing and maximum opening Any position between the positions, there are hidden dangers; second, after the electric energy meter is in arrears, the user pulls the handle to the closing position. At this time, the contact of the circuit breaker can be connected, and the power supply can still be closed, which does not meet the regulations of the State Grid ;Third, the inner shaft transmission is not used. When the user owes the fee, the user can destroy the linkage handle between the poles through a rogue operation, so as to achieve the purpose of continuing to use electricity in arrears, that is, it is impossible to realize the real fee. control, does not meet the requirements of the State Grid

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