Switch-on locking and tripping device of permanent magnet breaker

Abstract

The invention relates to a permanent magnetic circuit breaker closing lock catch and a tripping device, in particular to a closing lock catch and a tripping device which are applicable to a high-voltage permanent magnetic circuit breaker. The permanent magnetic circuit breaker closing lock catch and the tripping device are characterized in that: a mainshaft is provided with a lock catch connecting lever, a closing connecting lever and an opening connecting lever; the latching connecting lever is provided with a lock catch idler wheel; the closing connecting lever is provided with a closing idler wheel; the opening connecting lever is provided with an opening idler wheel. A tripping cam and an opening cam are respectively arranged on a square shaft; the tripping cam can be engaged to a closing fastener plate; the opening cam can be engaged to the opening idler wheel; the closing fastener plate is arranged on a fastener plate shaft, can be engaged to the latching idler wheel and the position thereof is restricted by a left position limit screw; the opening plate is fixed on a closing fastener plate, connected with an excitation tripping device and provided with a recovery spring. The permanent magnetic circuit breaker closing lock catch and the tripping device of the invention have the advantages of simple, compact and reasonable structure, being applied to high-voltage permanent magnetic circuit breakers, and realizing the closing fastening and tripping of the high-voltage permanent magnetic circuit breaker so as to avoid damaging the power system due to the closing rebound phenomenon of the circuit breaker.

Description

technical field [0001] The invention relates to a closing lock and trip device, in particular to a closing lock and trip device suitable for high-voltage permanent magnet circuit breakers. Background technique [0002] When the average speed of manual closing of the permanent magnet circuit breaker is ≥0.6m / s, the phenomenon of closing rebound sometimes occurs, that is, after the moving iron core of the permanent magnet reaches the closing magnetic pole, the reaction force of the overtravel spring in the three-phase vacuum interrupter Under normal circumstances, the moving iron core will be a few millimeters away from the closing magnetic pole, resulting in a fault of seemingly closing and non-closing. Such faults can cause serious damage to power lines. Since this problem cannot be solved, the current permanent magnet circuit breaker only has the electric closing function, but does not have the manual closing function. Contents of the invention [0003] The purpose of t...

AI Technical Summary

Problems solved by technology

[0002] When the average speed of manual closing of the permanent magnet circuit breaker is ≥0.6m / s, the phenomenon of closing rebound sometimes occurs, that is, after the moving iron core of the permanent magnet reaches the closing magnetic pole, the reaction force of the overtravel spring in the three-phase vacuum interrupter In this case, the moving iron core will be separated from the closing magnetic pole by several millimeters, resulting in a fault of seemingly closing and non-closing

Such faults can cause serious damage to power lines

Since this problem cannot be solved, the permanent magnet circuit breaker only has the function of electric closing at present, and does not have the function of manual closing.

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