A dual-mechanism operating system for a permanent magnet circuit breaker

Abstract

The invention relates to a permanent magnet breaker dual-mechanism operation system. The system includes a box body and an operation mechanism mounted in the box body, the operation mechanism includesa spring mechanism and a permanent magnet mechanism which are both connected to a connecting rod, the permanent mechanism or the spring mechanism drives the connecting rod to move to a switch-on position, and then the connecting rod is maintained at the switch-on position by the spring mechanism. The system has the advantages that by improving a traditional switchable electric brake, when the brake is switched on, the retaining force of the permanent magnet mechanism is basically removed, a product is completely maintained at the switch-on position by the spring maintaining mechanism, a safeand reliable structure of the spring maintaining mechanism is fully utilized, and the switch-on stability of the product is improved. When the brake is switched off, only a tripping electromagnet needs to be powered on without electrifying coils of the permanent magnet mechanism, and therefore the problem that switch-off features of permanent magnet breakers in the industry are unstable is solved.Meanwhile, an electrical schematic diagram and wiring diagram of the product are greatly simplified, and the whole performance of a permanent magnet breaker is further improved.

Description

technical field [0001] The invention relates to a circuit breaker, in particular to a dual-mechanism operating system for a permanent magnet circuit breaker. Background technique [0002] The operating mechanism is an important part of the high-voltage circuit breaker, which consists of an energy storage unit, a control unit and a force transmission unit. There are many types of operating mechanisms for high-voltage circuit breakers, such as spring operating mechanisms, permanent magnetic operating mechanisms and pneumatic mechanisms. [0003] The permanent magnet operating mechanism is composed of a carbon steel shell, a moving iron core rod, a permanent magnet, and a coil. The structure of the mechanism is simple, the number of parts is small, and the transmission is reliable. At the same time, the output characteristics of the permanent magnet mechanism are especially suitable for closing vacuum circuit breakers. Requirements for reaction force characteristics. [0004]...

AI Technical Summary

Problems solved by technology

[0004] At present, the permanent magnet operating mechanism in use in the market needs the permanent magnet mechanism to provide the closing holding force requirements when the product is closing; when the electric opening trips, the permanent magnet mechanism and the opening coil are required The tripping action is performed when the power is received, and the parallel circuit has very high requirements on the power supply of the control system, and there is an action sequence problem; in addition, when the manual opening and tripping is performed, the permanent magnet mechanism and the opening coil are required for manual tripping action and the permanent magnet is self-maintaining. The force is very large, and the manual operation force is also very large, and the operation is very laborious

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