Switching-off and switching-on tripping device of circuit breaker operating mechanism

Abstract

The invention discloses a switching-off and switching-on tripping device of a circuit breaker operating mechanism. The switching-off and switching-on tripping device of the circuit breaker operating mechanism is arranged on a base. The switching-off and switching-on tripping device of the circuit breaker operating mechanism comprises a crank arm body and an electromagnet; the crank arm body is connected with the electromagnet through a lever group; and the lever group is composed of a plurality of levels of orderly-arranged force reducing levers. The switching-off and switching-on tripping device further comprises a locking safety pin; the locking safety pin is arranged in a mounting hole of the base through adopting a plug-in structure and is used for limiting the rotation of a last level of force reducing lever which is connected with the electromagnet; the lever group consists of four levels of force reducing levers with force reducing characteristics; and each level of force reducing lever is provided with a lever resetting spring. The switching-off and switching-on tripping device of the circuit breaker operating mechanism has a mechanical anti-tripping locking function, so that traditional switching-off and switching-on tripping functions as well as safety locking of the tripping device can be realized; the four levels of force reducing levers with force reducing characteristics are combined together, so that switching-off and switching-on locking and release of a high-power operating mechanism can be realized. The switching-off and switching-on tripping device of the circuit breaker operating mechanism has the advantages of simple structure, reliable function and low cost.

Description

technical field [0001] The invention relates to the transmission technology of the circuit breaker operating mechanism, and more specifically, relates to an opening, closing and tripping device in the circuit breaker operating mechanism. Background technique [0002] The circuit breaker is an important switching device in the power system, which is used to realize the cutting (opening) and conducting (closing) of the grid current transmission. The operating mechanism is the power part of the circuit breaker. When the circuit breaker receives the system opening and closing signals, the operating mechanism drives the circuit breaker body to perform opening or closing operations to realize the breaking and closing of the current. [0003] To realize the safe breaking and closing of the current, the circuit breaker body usually needs to reach a high speed of motion, and the operating mechanism needs to provide a high energy output in a very short time. This requires that the op...

AI Technical Summary

Problems solved by technology

[0005] However, the existing traditional opening and closing tripping device can only simply realize the locking and releasing of the operating potential energy, but does not have the anti-tripping function

When the operating mechanism of the circuit breaker is abnormal or there is external interference (accidental electric action of the electromagnet, vibration, misoperation of the staff, etc.), there will be unexpected energy release, that is, the opening and closing tripping device will trip by mistake. action

In addition, during the debugging process of the operating mechanism in the factory, especially when the slow separation and slow closing tool is mounted for slow separation and slow closing operation (according to the requirements of the national grid operation standard), and during the operation process, the regular inspection of the staff And phased maintenance, the staff will inevitably need close contact with the operating mechanism and even need to replace internal parts

If the staff is in the process of operation, the opening and closing trip device of the operating mechanism is abnormally triggered and malfunctions, and the huge potential energy is released instantaneously, which will bring serious safety hazards to the staff

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