A circuit breaker tripping mechanism, an opening and closing operation device and a circuit breaker thereof

Abstract

The invention discloses a circuit breaker, and a tripping mechanism and opening / closing device thereof. In the tripping mechanism of the circuit breaker, a driven part is molded in the side, of the back side of the circuit breaker, of a lock catch, the back side of the circuit breaker is provided with a driving groove corresponding to the driven part, an actuated piece extends into the circuit breaker via the driving groove, and is linked with the driven part, and the actuated piece moves along the driving groove, and drives lock catch and changes the lock catch from a locking state to a tripping state. According to technical schemes of the invention, tripping of the circuit breaker is driven in the back side of the circuit breaker, the circuit breaker is opened and tripped needless of a tripping shaft, and the circuit breaker is independent from the tripping shaft; and the opening / closing device needs not to be mounted at the side of the tripping shaft in the circuit breaker, and can play the opening / closing role when being mounted at the other side in the circuit breaker, more selections are provided, and the suitable range is wider.

Description

technical field [0001] The invention relates to the technical field of low-voltage electrical appliances, in particular to a tripping mechanism of a circuit breaker, an opening and closing operation device and a circuit breaker thereof. Background technique [0002] According to the intelligent requirements of my country's power supply network, it is necessary for the terminal actuator of the power supply network - the small circuit breaker to have the function of tripping and closing when executing the upper-end signal; Electric remote control function. Therefore, manually operated circuit breakers can no longer meet the requirements of the smart grid. It is necessary to match the circuit breaker products specially used for prepaid meters, which can realize automatic reclosing operation, transmit a control signal, and realize remote control, so that the circuit breaker can be automatically operated. Closing or opening, instead of requiring staff to manually open and close t...

AI Technical Summary

Problems solved by technology

When opening, the bump on the driving gear drives the driving rod to swing, and one end of the driving rod moves the tripping shaft on the circuit breaker to perform the opening action. When closing, the handle gear drives the handle to drive the circuit breaker to close. The drive lever lacks the reset function. During the closing process of the circuit breaker, the trip lever drives the drive lever to reset, especially the reclosing device with one-way rotation of the motor is very dependent on the trip axis. In practical applications, long-term use, It will cause damage to the tripping shaft and affect the tripping performance

[0004] Because the tripping shaft is only located on one side of the circuit breaker, when the commercially available reclosing device is used together with the circuit breaker, the reclosing device must be installed on the side of the circuit breaker with the tripping shaft to realize the reclosing function. In actual use, it is not convenient to install the reclosing device on the side of the circuit breaker with the trip shaft due to insufficient space.

It can be seen that there are certain limitations in the matching use of existing circuit breakers and reclosing devices

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