Damping driving mechanism and liquid-magnetic circuit breaker

Abstract

The invention provides a damping driving mechanism and a liquid-magnetic circuit breaker. The damping driving mechanism comprises a static iron core, a movable iron core, a driving part, a resetting spring and a coil, wherein the driving part is fixed on the movable iron core; the coil is wound around the static iron core and the movable iron core; when current of the coil is more than rated current, an attraction force between the static iron core and the movable iron core is more than a pre-tightening force of the resetting spring; the movable iron core moves toward the static iron core and the driving part moves along the movement of the iron core. The damping driving mechanism has the advantages that the iron cores in an oil damping device are ingeniously designed and an elastic force of the spring is overcome under the action of a magnetic field force; when the damping driving mechanism upward moves to a proper distance from the static iron core, the attraction force between two magnetic poles is greatly more than an acting force of the spring, so that the iron cores are rapidly attracted; meanwhile, the mechanism is triggered to move through the driving part.

Description

technical field [0001] The invention relates to a damping drive mechanism and a liquid magnetic circuit breaker. Background technique [0002] At present, miniature circuit breakers widely used in China can be divided into two types. One of them is thermal magnetic (bimetal) miniature circuit breaker. The advantage of this kind of miniature circuit breaker is high breaking capacity, complete variety and modular structure, which is convenient for design and application. The disadvantage is that due to the use of high power consumption (bimetal) as the overload control element, its own energy consumption is very high; at the same time, because the (bimetal) is affected by the ambient temperature, the normal operating temperature range (-5 ° C ~ +40℃) The overload protection characteristics are unstable (except for special treatment), so it cannot be used in occasions where the ambient temperature range changes greatly; moreover, because the ambient temperature value has a gre...

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Problems solved by technology

However, the AC breaking capacity of this type of product is not high, so the equipment circuit breaker products currently produced in China can only be used in communication and other fields.

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