CN202736697U

CN202736697U - Casting type current transformer

Info

Publication number: CN202736697U
Application number: CN 201220269688
Authority: CN
Inventors: 李阳; 王红庆
Original assignee: Pinggao Group Co Ltd
Current assignee: Henan high General Electric Co., Ltd.; Pinggao Group Co Ltd
Priority date: 2012-06-08
Filing date: 2012-06-08
Publication date: 2013-02-13
Anticipated expiration: 2022-06-08

Abstract

The utility model relates to a casting type current transformer which comprises a casting body and a primary wiring terminal, wherein the primary wiring terminal is fixedly arranged on the casting body through casting; an embedded through hole is formed in the corresponding wiring position of the primary wiring terminal; a steel insert nut in a T-shaped structure is inserted into the embedded through hole; the column body of the insert nut is inserted into the embedded through hole, and the upper end surface of the column body is not higher than the top surface of the primary wiring terminal, which is used for connection and conduction; the head of the insert nut is positioned outside the embedded through hole; a threaded hole in the insert nut is a blind hole, and the opening of the threaded hole is formed on the column body; and the insert nut is fixedly arranged on the casting body through casting. According to the casting type current transformer, in the condition that a part of flow capacity of the primary wiring terminal of the current transformer is guaranteed, the strength of the connecting position of the primary wiring terminal and inlet and outlet wiring terminals is increased, and reliable connection between the inlet and outlet wiring terminals and the primary wiring terminal of the current transformer is realized by tightening a fastening screw with the insert nut.

Description

Pouring current transformer

Technical field

The utility model relates to a kind of pouring current transformer.

Background technology

Fig. 1-pouring current transformer shown in Figure 3; it comprises pour mass 1; be provided with secondary winding 3 in the pour mass; be provided with primary connection terminal 2 and secondary outlet terminal by pouring into a mould fixing mode on the pour mass; wherein; the primary connection terminal adopts the fine copper copper coin to make (through-current capability is strong); copper coin is provided with tapped through hole 4; in use; the user directly will advance with fastening bolt; the binding post of outlet is connected with the primary connection terminal of this current transformer; advance; the binding post of outlet and the binding post of current transformer be contacting for face and face partly; when connecting; in order to reduce contact resistance, increase the reliability that connects, usually come fastening bolt with larger pretightning force; because the intensity of fine copper copper coin material is relatively poor; so it is damaged the screwed hole of primary connection terminal part often can to occur, thereby cause whole instrument transformer to be scrapped, cause greater loss.

The utility model content

The purpose of this utility model provides a kind of pouring current transformer, with the threaded connection hole that solves primary connection terminal part in the prior art impaired technical problem often.

For achieving the above object, the utility model adopts following technical scheme: pouring current transformer, comprise that pour mass and cast are fixed on the primary connection terminal on the pour mass, the position of the corresponding wiring on the primary connection terminal is provided with the setting-in through hole, be fitted with the insert nut of steel in the setting-in through hole, the T-shaped structure of insert nut, the cylinder of insert nut is inserted in the setting-in through hole, the upper surface of described cylinder is not higher than the end face that is used for connecting conducting of primary connection terminal, the head of insert nut is positioned at outside the setting-in through hole, screwed hole in the insert nut is blind hole, and the opening of screwed hole is located on the cylinder, and the insert nut cast is fixed on the pour mass.

Described insert nut head contacts cooperation with the bottom surface of primary connection terminal.

The utility model is by arranging the insert nut of steel at the primary connection terminal, in the situation that guarantees this current transformer primary connection terminal part through-current capability, increased the intensity of primary connection terminal with the position that is connected into and out of the line binding post, trip bolt is by realizing into and out of reliable being connected of line binding post with current transformer primary connection end parts with tightening of insert nut.

Description of drawings

Fig. 1 is the front view of existing pouring current transformer;

Fig. 2 is the vertical view of Fig. 1;

Fig. 3 is the partial enlarged drawing among Fig. 1;

Fig. 4 is the front view of a kind of embodiment of the utility model;

Fig. 5 is the partial enlarged drawing among Fig. 4;

Fig. 6 is the front view of insert nut.

Embodiment

A kind of embodiment of the utility model pouring current transformer sees Fig. 4-shown in Figure 6, and the insert nut 7 that it comprises pour mass 1, primary connection terminal 6, secondary outlet terminal and steel is provided with secondary winding 3 in the pour mass.Insert nut 7 T-shaped structures, screwed hole wherein is blind hole, the opening of screwed hole is positioned on the cylinder of insert nut; Primary connection terminal 6 is made by the fine copper copper coin, the position of the corresponding wiring on it is provided with the setting-in through hole, the cylinder of insert nut 7 is inserted in the setting-in through hole, the upper surface of cylinder is concordant with the end face 8 for being connected conducting of primary connection terminal, the head of insert nut 7 is positioned at outside the setting-in through hole, and for the ease of centering and location, the insert nut head contacts cooperation with the bottom surface of primary connection terminal; In manufacturing process, first insert nut 7 and primary connection terminal 6 are assembled as requested, and then be fixed on the pour mass by the mode of pouring into a mould together.

Among other embodiment of the present utility model, the insert nut head can not contact with the bottom surface of primary connection terminal, but need to guarantee vertical the getting final product of end face of axis with the primary connection terminal of insert nut when pouring into a mould fixedly; In addition, the upper surface of cylinder can be lower than the end face 8 of primary connection terminal.

Claims

1. pouring current transformer, comprise that pour mass and cast are fixed on the primary connection terminal on the pour mass, it is characterized in that: the position of the corresponding wiring on the primary connection terminal is provided with the setting-in through hole, be fitted with the insert nut of steel in the setting-in through hole, the T-shaped structure of insert nut, the cylinder of insert nut is inserted in the setting-in through hole, the upper surface of described cylinder is not higher than the end face that is used for connecting conducting of primary connection terminal, the head of insert nut is positioned at outside the setting-in through hole, screwed hole in the insert nut is blind hole, the opening of screwed hole is located on the cylinder, and the insert nut cast is fixed on the pour mass.

2. pouring current transformer according to claim 1, it is characterized in that: described insert nut head contacts cooperation with the bottom surface of primary connection terminal.