Small-scale intelligent current transformer

Abstract

The invention provides a small-scale intelligent current transformer. The current transformer includes an outer sleeve pipe, a primary coil, a secondary coil and a contact box; the outer sleeve pipe includes a coil fixing pipe and a contact box fixing pipe, a first panel is fixed on the end face of the coil fixing pipe, a conductive row passes through the center of the first panel and is arranged in the coil fixing pipe, the coil fixing pipe is internally provided with an iron core, the primary coil and the secondary coil are arranged in the coil fixing pipe in an iron core winding mode, a second panel is fixed on the end face of the contact box fixing pipe, the contact box is fixed in the contact box fixing pipe through the second panel in a sealing mode, the temperature rise can be monitored online, the sealing property is good, the service life is prolonged, and the current transformer is safer and more reliable.

Description

technical field [0001] The invention belongs to a current transformer, in particular to a small intelligent current transformer applied to an air-insulated switch cabinet. Background technique [0002] A current transformer (hereinafter referred to as CT) is based on the principle of electromagnetic induction and consists of a closed iron core and a winding. The number of turns of the primary winding of the CT is very small, and generally a single turn of the wire passes through the CT core; the number of turns of the secondary winding of the CT is relatively large, and the output of the secondary winding is generally connected in series to the measuring instrument or the protection circuit. Because the number of turns of the primary and secondary windings is inconsistent, that is, there is a CT ratio, so the CT can convert the large current on the primary side or the high-voltage side to the small current on the secondary side or the low-voltage side, which is convenient fo...

AI Technical Summary

Problems solved by technology

[0003] In order to meet the requirements of air-insulated switchgear, the existing current transformers are large in size and prone to overheating during the working process, which affects the service life of the current transformer and affects the safety performance

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