Quick-to-insert-and-extract split-core current transformer

Abstract

A quick-to-insert-and-extract split-core current transformer comprises two semi frame-like transformer plastic shells up and down, wherein press pieces are respectively and integrally arranged at front and rear parts of a left-right frame of the lower transformer plastic shell; buckle pins are arranged at the inner sides of the press pieces; pin fixing holes are formed in the left and right positions of the corresponding upper transformer plastic shell; connecting insertion rods are fixed at the end surface of the left-right frame of the lower transformer plastic shell; connecting ends with insertion holes are formed in the end surface of a left-right frame of the corresponding upper transformer plastic shell; elastic pieces are integrally arranged at the bottoms of cavities of the two transformer plastic shells up and down; the elastic pieces push against a winding of each semi frame-like iron core; when the two transformer plastic shells up and down are buckled, the elastic pieces enable the semi frame-like iron cores in the two transformer plastic shells up and down to be rightly attached. Upper and lower parts of the transformer can be quickly opened and closed by inserting and extracting, and are extremely easy to mount, detach and maintain. The elastic pieces integrated with the plastic shells ensure tight attachment of the iron cores and improve measuring precision.

Description

technical field [0001] The invention belongs to the technical field of current transformers, in particular to a split current transformer. Background technique [0002] There are two types of open-close current transformers used in the prior art. One is bound with stainless steel strips. The stainless steel has six oblong holes, pivot pins at both ends, and a through hole and a screw hole. Bolts are installed. Tighten or disassemble during maintenance; the other is to add card slots at both ends of the opening and closing part, insert screws in the middle, and connect through bolts to achieve reliable engagement of the two parts of the transformer. These two installation modes all have the problem that the steel strip and the transformer need to be separated during disassembly and installation, or the bolts are disassembled, which is inconvenient and unsafe to use. In addition, after the two iron cores of the split current transformer are buckled together, there will often ...

AI Technical Summary

Problems solved by technology

These two installation modes both have the problem that the steel strip and the transformer need to be separated during disassembly and installation, or the bolts are disassembled, which is inconvenient and unsafe to use.

In addition, after the two iron cores of the open-close current transformer are fastened together, the fit is often not tight, which affects the measurement accuracy of the transformer.

The upper and lower parts are also connected by a shaft at one end, and the upper and lower parts cannot be completely separated, which is inconvenient in operation

When the two iron cores of the open-close current transformer are snapped together, there is also an elastic material as the compensation for the gap between the iron cores. In practical applications, it is found that the effect is poor, and the elastic material is prone to failure, resulting in incomplete closure of the two iron cores, affecting its normal measurement

And when the operator assembles the transformer, the elastic material is inconvenient to locate, resulting in low assembly efficiency of the operator and increasing the product cost

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