Quick saturation current transformer

Abstract

The invention relates to a quick saturation current transformer, which comprises an iron core magnetic path, a secondary winding and a processing unit, wherein the iron core magnetic path encircles a circuit conductor to be protected; one part of the iron core magnetic path penetrates through the secondary winding to form a magnetic core of the second winding; and the secondary winding outputs a signal to the processing unit through a lead wire. The quick saturation current transformer is characterized in that the iron core magnetic path is in a shape of a Chinese character 'RI' formed by stacking and connecting a connection frame, main magnetic sheets and auxiliary magnetic sheets; the main magnetic sheets are frames at the periphery of the Chinese character 'RI'; and the auxiliary magnetic sheets are transversely arranged in the middle of the Chinese character 'RI'. The thicknesses of the stacked main magnetic sheets are the same as or different from those of the stacked auxiliary magnetic sheets; the materials of the main magnetic sheets are the same as or different from those of the auxiliary magnetic sheets; and the connection frame is made of a ferromagnetic material or a non-ferromagnetic material. The auxiliary magnetic sheets are independent from the main magnetic sheets, so that the number of auxiliary magnetic sheets is different from that of main magnetic sheets, so that different magnetic division requirements are met, so that transformers with different rated currents and of different specifications in the same shell intelligent circuit breaker can be well serialized; the quick saturation current transformer is relatively high in applicability, and the cost is saved.

Description

Technical field [0001] The invention relates to an electrical magnetic accessory called a fast saturation current transformer, which is matched with an intelligent circuit breaker to provide a current self-generating power supply for the circuit breaker controller, which is an optimization of the known current transformer. Background technique [0002] The usual current transformer is a special transformer, which is widely used in power supply systems to supply voltage or current coils of measuring instruments and relays. Change the large current in the primary circuit into the standard small current in the secondary circuit, so that the measuring instruments and protection devices are standardized and miniaturized. Because there is no electrical connection between the primary side and the secondary side of the transformer, only the magnetic connection, the secondary equipment is isolated from the high current part, and the secondary side of the transformer is grounded, thus ensu...

AI Technical Summary

Problems solved by technology

When the primary current increases, the secondary current increases approximately proportionally. In addition to meeting the functional requirements of the control circuit, most of it becomes surplus power, which is consumed in transformers and electronic circuits in the form of heat, burning electrical components and accelerating devices. Aging, various heat sinks need to be added for reliable operation

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