Small current transformer iron core structure for protection

Abstract

The invention provides a small current transformer iron core structure for protection. The iron core structure comprises an upper iron core piece, a lower iron core piece and a framework, the lower iron core piece is fixedly installed at the lower end of the upper iron core piece, first connectors are fixedly connected to the bottoms of the left end and the right end of the upper iron core piece, the framework is fixedly installed at the joint of the upper iron core piece and the lower iron core piece, the interior of the framework is clamped and fixed to clamping grooves, and a coil is wound at the upper end of the framework. According to the small current transformer iron core structure for protection, when the upper iron core piece and the lower iron core piece enter the framework, clamping plates are pushed to move inwards, after the first connectors and second connectors enter an outer cover, the clamping plates are clamped into the clamping grooves through reset of first springs and abut against the first connectors or the second connectors, at the same time, an inserting rod is inserted into a second limiting groove, connection between the first connectors and the second connectors is further stabilized, the upper iron core piece and the lower iron core piece are not prone to being separated, meanwhile, the framework can be stably connected between the upper iron core piece and the lower iron core piece without rivets or welding, and great convenience is achieved.

Description

technical field [0001] The invention relates to the technical field of transformers, in particular to a core structure of a small current transformer for protection. Background technique [0002] At present, with the continuous development of the smart grid, the precision requirements for various transformers are higher and the demand is increasing. The commonly used transformer core structure is mainly laminated, including O-type and L-type, etc. structure, O-type transformer coil winding efficiency is low, L-type transformer coil winding efficiency is high, but the assembly efficiency of iron core inserts is low, and riveting or welding processes are required, which also cannot effectively improve efficiency and reduce costs. In addition, The splicing surface of the L-shaped iron core is a straight face. Due to the manufacturing accuracy and other issues, a certain gap must be left at the splicing surface, resulting in a large magnetic gap, which is not conducive to the im...

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Problems solved by technology

[0002] At present, with the continuous development of the smart grid, the precision requirements for various transformers are higher and the demand is increasing. The commonly used transformer core structure is mainly laminated, including O-type and L-type, etc. structure, O-type transformer coil winding efficiency is low, L-type transformer coil winding efficiency is high, but the assembly efficiency of iron core inserts is low, and riveting or welding processes are required, which also cannot effectively improve efficiency and reduce costs. In addition, The splicing surface of the L-shaped iron core is a straight face. Due to the manufacturing accuracy and other issues, a certain gap must be left at the splicing surface, resulting in a large magnetic gap, which is not conducive to the improvement of the characteristics of the transformer.

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