Device and method for automatic charging and demagnetization of electromagnetic residual current operated circuit breaker

Abstract

The invention relates to a device for magnetizing and demagnetizing of an electromagnetic type residual current operated circuit-breaker. The device comprises a controller, a magnetizing circuit portion, a demagnetizing circuit portion, a leakage current output and detecting device and a magnetizing and demagnetizing switching relay, the magnetizing circuit portion, the demagnetizing circuit portion, the leakage current output and detecting device and the magnetizing and demagnetizing switching relay are connected with the controller, and the magnetizing and demagnetizing switching relay is connected with a coil. A method includes the following steps that the controller controls the leakage current output and detecting device to output upper limit current to an input end of the residual current operated circuit-breaker, when the residual current operated circuit-breaker does not act, the controller controls the demagnetizing circuit portion to perform adjustment of demagnetizing, the controller controls the leakage current output and detecting device to output lower limit current to an input end of the residual current operated circuit-breaker, and when the residual current operated circuit-breaker acts, the controller controls the magnetizing circuit portion to perform magnetizing. By means of the device and the method for magnetizing and demagnetizing of the electromagnetic type residual current operated circuit-breaker, upper limit current test and lower limit current test are matched with a magnetizing and demagnetizing process so that magnetizing and demagnetizing can be rapidly finished, the accurate magnetizing and demagnetizing process is finished by means of climbing current test, and qualities of magnetized and demagnetized products are guaranteed.

Description

technical field [0001] The invention relates to a device and method for automatic charging and demagnetization adjustment, which belong to the technical field of charging and demagnetization, and are applied to the charging and demagnetization adjustment device and method in the production process of electromagnetic residual current operated circuit breakers. Background technique [0002] In recent years, with the continuous improvement of industrial and civil safety requirements for electricity use, residual current operated circuit breakers have been widely used. Among them, electromagnetic residual current operated circuit breakers are stable and reliable in operation, and their protection characteristics are not subject to AC power interference. and other advantages and much favored. At present, the power protection in developed countries such as Europe and the United States mostly uses electromagnetic residual current operated circuit breakers. In China, the applicatio...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of low production efficiency and poor charging and demagnetization effects in the production process of the existing electromagnetic residual current operated circuit breaker, the present invention provides a method for automatic charging and demagnetizing adjustment of the electromagnetic residual current operated circuit breaker. A device, that is, a device and method for magnetizing with an instantaneous strong magnetic field in a fixed direction, and demagnetizing with an alternating and attenuating instantaneous strong magnetic field

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