CN208188183U

CN208188183U - A kind of clamp current transformer

Info

Publication number: CN208188183U
Application number: CN201820628750.7U
Authority: CN
Inventors: 阮志峰; 庄梅钦; 何海朋; 陈耀高; 林玉涵; 林晋洪; 张秀强; 张振宇; 武坤; 谢建敏; 吴雪玲
Original assignee: Red Phase Ltd By Share Ltd
Current assignee: Red Phase Ltd By Share Ltd
Priority date: 2018-04-28
Filing date: 2018-04-28
Publication date: 2018-12-04
Anticipated expiration: 2028-04-28

Abstract

A kind of clamp current transformer, including caliper, iron core and coil, two caliper tops are equipped with jaw, a clip are removably equipped on jaw, which is equipped with arc groove compatible with jaw.The size of arc groove can be customized according to the diameter of conducting wire, so that clamp current transformer only needs to change clip, can be suitable for the test of different size conducting wire.Therefore, the utility model overcomes the shortcomings that existing clamp current transformer, has many advantages, such as that structure is simple, easy to use, applicability is good, measurement efficiency is high and measurement accuracy is high.

Description

A kind of clamp current transformer

Technical field

The utility model relates to a kind of current measurement facilities, specifically a kind of clamp current transformer.

Background technique

Electric system must cooperate electric energy meter on-site calibrator to test in gauge check using clamp current transformer. The iron core of clamp current transformer is C-shaped, and transformer casing is equipped with jaw in iron core groove.The conducting wire of tested electric current will be connected with It is put into jaw, electric current is tested using electromagnetic induction principle, required data can be obtained.In order to improve accuracy, subtract Few measurement error, usually requires that conducting wire must be fixedly arranged at jaw center, and using the compensation circuit of self-balanced electronic to mutual inductance Device compensates.Although the advantages that existing clamp current transformer is not necessarily to power-off with easy-to-connect, and security performance is high, Remain following deficiency:

First, since the jaw size of existing clamp current transformer is all that fixation can not be adjusted, in test, if The conducting wire of different size is encountered, then needs frequently to replace the compatible clamp Current Mutual Inductance of jaw size according to the diameter of conducting wire Device, this makes its applicability insufficient, and measurement efficiency is low.

Second, the current error of existing clamp current transformer cooperation electric energy meter on-site calibrator test is usually 0.2%, measurement accuracy (can only be up to 0.2 grade) is lower, is unable to satisfy measurement request.

Summary of the invention

The utility model provides a kind of clamp current transformer, and main purpose is to solve existing clamp current transformer The problems such as existing applicability is insufficient, and measurement efficiency is low, and measurement accuracy is low.

The utility model adopts the following technical solution:

A kind of clamp current transformer, including caliper, iron core and coil, two above-mentioned caliper tops are equipped with jaw, and middle part is logical It is hinged to cross pin shaft, lower part is equipped with clamp handle, and a clip is removably equipped on above-mentioned jaw, which is equipped with and mutually fits with above-mentioned jaw The arc groove matched.

Further, above-mentioned clip set there are two respectively with the competing clamping plate in the upper surface of caliper and lower end surface, on two The side for stating clamping plate is connected by a connecting plate, which is equipped with above-mentioned arc groove at jaw；Two above-mentioned clamping plates it is another Side is equipped with the limited block inconsistent with caliper side wall.

Further, the upper surface and lower end surface of above-mentioned caliper are equipped with positioning column, be equipped on the inside of two above-mentioned clamping plates with Above-mentioned positioning column mutually pushes up the Blind locating holes held.

Compared to the prior art, the beneficial effect that the utility model generates is:

The utility model includes caliper, iron core and coil, and two caliper tops are equipped with jaw, are removably equipped with one on jaw Clip, the clip are equipped with arc groove compatible with jaw.The size of arc groove can be customized according to the diameter of conducting wire, so that Clamp current transformer only needs to change clip, can be suitable for the test of different size conducting wire.It can be seen that the utility model gram The shortcomings that having taken existing clamp current transformer, with structure is simple, easy to use, applicability is good, measurement efficiency is high and surveys The advantages that accuracy of measurement is high.

Detailed description of the invention

Stereoscopic schematic diagram when Fig. 1 is the utility model not set clip.

Fig. 2 is stereoscopic schematic diagram when clip is arranged in the utility model.

Fig. 3 is the stereoscopic schematic diagram of clip in the utility model.

Specific embodiment

Illustrate specific embodiment of the present utility model with reference to the accompanying drawings.For comprehensive understanding the utility model, below Many details are described to, but to those skilled in the art, can also realize the utility model without these details.

Referring to FIG. 1, FIG. 2 and FIG. 3, a kind of clamp current transformer, including caliper 1, iron core (not embodied in figure) and coil (not embodying in figure), two calipers, 1 top are equipped with jaw 11, and middle part is hinged by pin shaft 12, and lower part is equipped with clamp handle 13, on jaw 11 It is removably equipped with a clip 2, which is equipped with arc groove 221 compatible with jaw 11.Wherein, the size of arc groove 221 It can be customized according to the diameter of conducting wire, so that clamp current transformer only needs to change clip 2, can be led suitable for different size The test of line, and clip 2 can ensure that conducting wire is fixed at the center of jaw 11, can effectively less measurement error, raising measure Accuracy.

Referring to Fig. 2 and Fig. 3, specifically, clip 2 sets that there are two mutually contradict with the upper surface of caliper 1 and lower end surface respectively Clamping plate 21, the sides of two clamping plates 21 connected by a connecting plate 22, which is equipped with arc groove 221 at jaw 11； The other side of two clamping plates 21 is equipped with the limited block 211 inconsistent with 1 side wall of caliper.

Referring to Figure 1 and Figure 3, as a preferred solution: the upper surface and lower end surface of caliper 1 are equipped with positioning column 111, two clamping plates 21 inside, which is equipped with, mutually pushes up the Blind locating holes 212 held with positioning column 111.The setting of positioning column 111 and Blind locating holes 212, It can play the role of positioning and reinforcing, so that clip 2 can be securely arranged on caliper 1, so that it is guaranteed that the accuracy of measurement.

Referring to 1, Fig. 2 and Fig. 3, illustrate the specifically used mode of the utility model: before test, according to tested ampere wires Size selects suitable clip 2, and clip 2 is mounted at jaw 11；When test, the clamp handle 13 for clamp on amperemeter of holding with a firm grip makes Jaw 11 opens, and the conducting wire for being connected with tested electric current is put into arc groove 221；After unclamping clamp handle 13, jaw 11 is closed, conducting wire quilt It is fixed at 11 center of jaw, electric current is tested using electromagnetic induction principle, required data can be obtained.

The above is only the specific embodiments of the present invention, but the design concept of the present invention is not limited thereto, All non-essential modifications to the present invention made by this concept should belong to the row for invading scope of protection of the utility model For.

Claims

1. a kind of clamp current transformer, including caliper, iron core and coil, the two caliper tops are equipped with jaw, and middle part passes through Pin shaft is hinged, and lower part is equipped with clamp handle, it is characterised in that: a clip is removably equipped on the jaw, which is equipped with and institute State the compatible arc groove of jaw.

2. a kind of clamp current transformer as described in claim 1, it is characterised in that: the clip set there are two respectively with pincers The side of the competing clamping plate in upper surface and lower end surface of body, two clamping plates is connected by a connecting plate, which exists The arc groove is equipped at jaw；The other side of two clamping plates is equipped with the limited block inconsistent with caliper side wall.

3. a kind of clamp current transformer as claimed in claim 2, it is characterised in that: the upper surface and lower end surface of the caliper It is equipped with positioning column, is equipped on the inside of two clamping plates and mutually pushes up the Blind locating holes held with the positioning column.