Current transformer with one-circle primary winding

Abstract

The invention relates to a current transformer with a one-circle primary winding, belonging to the technical field of a transformer. The technical scheme provided by the invention is as follows: the current transformer comprises an expander (1), a conductive rod (2), an oil conservator (3), an insulator (4) and an oil tank (5); the expander is arranged above the oil conservator; the insulator is arranged below the oil conservator; the conductive rod is arranged on the oil conservator; the insulator is arranged on the oil tank; the conductive rod is connected with the primary winding; the primary winding is provided with two semicircular tubes; wiring pieces (6) are welded at the upper ends of the two semicircular tubes, respectively; the two wiring pieces are commonly connected to the conductive rod; a nut is arranged between the two wiring pieces, and the two wiring pieces are arranged by means of being separated by the nut (7); and the two wiring pieces are fastened on the conductive rod. The current transformer provided by the invention is used for overcoming the problem that the unqualified temperature rise is easily caused when the traditional current transformer with the large current ratio takes the primary winding as one circle; meanwhile, the current transformer is simple in operation, and is economic and practical without increasing sizes of parts and expanding the space of the oil conservator.

Description

technical field [0001] The invention relates to a current transformer with one-turn primary winding, belonging to the technical field of transformers. Background technique [0002] At present, in the large current ratio current transformer of the background technology, when the primary winding is one turn, the conductive plate of the primary lead wire is fastened with the conductive rod with a nut, the contact area is small, and the primary current is large, resulting in a relatively tight contact current here. If the temperature rise is too large, the temperature rise will easily exceed the standard limit, and the temperature rise of the transformer will seriously affect the performance of the transformer, or even cause an accident. Contents of the invention [0003] The purpose of the present invention is to provide a current transformer with a primary winding of one turn, increase the contact area, reduce the contact density, reduce the temperature rise, and solve the a...

AI Technical Summary

Problems solved by technology

[0002] At present, in the large current ratio current transformer of the background technology, when the primary winding is one turn, the conductive plate of the primary lead wire is fastened with the conductive rod with a nut, the contact area is small, and the primary current is large, resulting in a relatively tight contact current here. Large, the temperature rise is easy to exceed the standard limit, and the temperature rise of the transformer will seriously affect the performance of the transformer, or even cause an accident

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