Manual switching and lock catch protection device for high voltage vacuum permanent magnet circuit breaker

Abstract

The invention relates to a manual closing operation, opening operation and locking protection device of a high-pressure vacuum permanent magnet circuit breaker, which mainly comprises a main shaft, a main shaft crankarm, a connecting board, a rotary board and a square shaft which is connected on a shell of the circuit breaker. The main shaft crankarm is installed on the main shaft, one end of the main shaft crankarm is hinged with one end of the connecting board and the other end of the connecting board is hinged with the rotary board which is installed on a rotary fulcrum shaft and rotates around the fulcrum shaft. A closing roller wheel and an opening roller wheel are arranged at the bottom of an inner cavity of the rotary board at intervals, and the lower part of the rotary board is provided with a cam which is arranged on the square shaft. The cam moves in a way of being matched with the closing roller wheel and the opening roller wheel so as to realize the closing and opening of the circuit breaker. The manual closing operation, opening operation and locking protection device for a high-pressure vacuum permanent magnet circuit breaker has few parts, simple structure, few fault points, reliable performance and no interference between electric operation and purely mechanical manual operation. One cam and two roller wheels are used for achieving manual closing operation, manual opening operation, and protecting functions of closing locking, opening locking.

Description

technical field [0001] The invention relates to a high-voltage vacuum permanent magnet circuit breaker, in particular to a manual closing, opening and locking protection device of the high-voltage permanent magnet circuit breaker used in a coal mine power system. Background technique [0002] The high-voltage vacuum permanent magnet circuit breaker is used in the power system. As a control and protection switch for high-voltage electrical equipment, it is required to be able to perform electric closing and opening operations, as well as manual closing and opening operations. At present, the electric operation technology of this product has matured, while the manual operation technology is still in the research and exploration stage. Although there are some permanent magnet circuit breakers with manual operation on the market, most of them only have the function of manual opening, and the function of manual closing is rare and immature. Basically, there are some problems as f...

AI Technical Summary

Problems solved by technology

Although there are some permanent magnet circuit breakers with manual operation on the market, most of them only have the function of manual opening, and the function of manual closing is rare and immature. Basically, there are some problems as follows: First, to realize manual opening And manual closing or other functions require their own supporting parts, the operating parts are complicated, there are many parts, and the characteristics of simple structure and few fault points of the permanent magnet circuit breaker are lost; second, the performance is unreliable, and it is easy to cause rejection and refusal. Electric operation and manual operation interfere with each other; third, manual closing and opening protection functions are not complete

Although this patent realizes manual closing and opening operation, it realizes manual operation through two cams, two rollers, one eccentric wheel, one overrunning clutch cam, and three rocker arms. The structure is complex, there are many parts, and there are many driving coordination points. , increasing the fault point, high cost, inconvenient processing and maintenance, and the patent has no closing and opening lock protection device, which cannot avoid faults caused by misoperation, and the safety performance is unstable

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