CN213150558U

CN213150558U - Strut type current transformer

Info

Publication number: CN213150558U
Application number: CN202022504239.6U
Authority: CN
Inventors: 陈建兴; 徐峰; 王曙栋
Original assignee: Orient Electric Co ltd
Current assignee: Orient Electric Co ltd
Priority date: 2020-11-03
Filing date: 2020-11-03
Publication date: 2021-05-07
Anticipated expiration: 2030-11-03

Abstract

The utility model discloses a strut type current transformer, which comprises a casting body, wherein the casting body comprises a supporting part, an umbrella skirt insulating part, an installation part and an isolation part which are concentrically arranged from bottom to top, a secondary terminal is arranged on the left side wall of the supporting part, a protection box is covered above the secondary terminal, the protection box is fixedly connected with the supporting part through screws, a primary terminal is arranged on the installation part, and the isolation part is positioned on the edges of the front side and the rear side of the installation part; the umbrella skirt insulating part is composed of a first umbrella skirt section, a second umbrella skirt section, a third umbrella skirt section and a fourth umbrella skirt section, the lengths of the first umbrella skirt section, the second umbrella skirt section, the third umbrella skirt section and the fourth umbrella skirt section are consistent, and the widths of the second umbrella skirt section, the first umbrella skirt section, the third umbrella skirt section and the fourth umbrella skirt section are decreased progressively. The remarkable effects are as follows: the volume of the current transformer is reduced, the manufacturing cost is reduced, and the better safe creepage distance is achieved.

Description

Strut type current transformer

Technical Field

The utility model relates to current transformer production technical field, concretely relates to pillar type current transformer.

Background

Current transformers (transformers) are devices that scale current. Its function is mainly to convert the large current into standard small current (5A or 1A, both referring to rated value) in proportion so as to realize the standardization and miniaturization of measuring instrument, protection equipment and automatic control equipment. And can be used for isolating high-voltage systems to ensure the safety of people and equipment.

With the miniaturization, intellectualization, low loss and low cost of power supply equipment, the requirements on the performance and the quality of the current transformer are higher and higher. However, most of the existing current transformers are large in size, complex in scheme, complex to install and high in maintenance cost.

Disclosure of Invention

The utility model aims at providing a not enough to prior art, the utility model aims at providing a support column type current transformer, this mutual-inductor adopt epoxy vacuum casting to form compact structure, simple to operate, safe and reliable, insulating stable.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a pillar type current transformer which the key lies in: the umbrella skirt insulation structure comprises a pouring body, wherein the pouring body is composed of a supporting part, an umbrella skirt insulation part, an installation part and an isolation part which are concentrically arranged from bottom to top, an accommodating cavity is formed in the front side wall of the supporting part, a nameplate is installed in the accommodating cavity, a secondary terminal is arranged on the left side wall of the supporting part, a protection box covers the upper part of the secondary terminal, the protection box is fixedly connected with the supporting part through screws, a primary terminal is arranged on the installation part, the isolation part is located on the edges of the front side edge and the rear side edge of the installation part, and the primary terminal is located between the two isolation parts;

the umbrella skirt insulating part comprises first umbrella skirt section, second umbrella skirt section, third umbrella skirt section and fourth umbrella skirt section, the lower extreme of first umbrella skirt section with the upper end of supporting part links to each other, the length of first umbrella skirt section, second umbrella skirt section, third umbrella skirt section is unanimous with the length of fourth umbrella skirt section, the width of second umbrella skirt section, first umbrella skirt section, third umbrella skirt section and fourth umbrella skirt section decreases progressively, the upper end of fourth umbrella skirt section with the lower extreme of installation department links to each other.

Furthermore, the longitudinal sections of the first shed section, the second shed section and the fourth shed section are rectangular.

Furthermore, the longitudinal section of the third shed section is trapezoidal, the larger end of the third shed section is connected with the second shed section, and the smaller end of the third shed section is connected with the fourth shed section.

Further, the projection area of the supporting part in the vertical direction is smaller than the projection area of the shed insulating part in the vertical direction.

Furthermore, the left side and the right side of the protection box are respectively provided with at least one threading hole.

Furthermore, the upper surface of the primary terminal protrudes from the upper surface of the mounting part.

Furthermore, the transformer further comprises a bottom plate, the bottom plate is installed at the bottom of the pouring body through a connecting bolt, a grounding bolt is further arranged on the left side of the bottom plate, and the grounding bolt is electrically connected with a winding coil inside the pouring body.

The utility model discloses a show the effect and be:

the transformer has the advantages that the structure is simple, the design is novel, and the safe creepage distance between the primary wiring terminal and the secondary wiring terminal on the transformer body is increased by arranging the primary terminal in a protruding manner; the umbrella skirt section through different width constitutes umbrella skirt insulating part, the volume of current transformer has not only been reduced, the cost of making is reduced, combine the isolation part moreover, make have better safe creepage distance between binding post and the secondary binding post, can adapt to more complicated abominable service environment, can also provide further safety protection effect to secondary binding post, thereby make this product have the installation flexibility, it is insulating stable, creepage distance is big, it is totally enclosed, dampproofing, prevent condensation, prevent electricity larceny, characteristics such as little are put in office.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a left side view of the present invention;

fig. 3 is a top view of the present invention;

fig. 4 is a bottom view of the present invention.

Detailed Description

The following provides a more detailed description of the embodiments and the operation of the present invention with reference to the accompanying drawings.

As shown in fig. 1, the pillar type current transformer comprises a casting body 2 and a bottom plate 1, wherein the casting body 2 is composed of a supporting part 21, a shed insulating part 22, an installation part 23 and a separation part 24 which are concentrically arranged from bottom to top, the projection area of the supporting part 21 in the vertical direction is smaller than the projection area of the shed insulating part 22 in the vertical direction, an accommodating chamber 25 is formed at a front side wall of the supporting portion 21, a nameplate (not shown) is installed in the accommodating chamber 25, on the left side wall of the support portion 21, a secondary terminal (not shown) is provided, over which a protection case 4 is covered, the protection box 4 is fixedly connected with the supporting part 21 through screws, at least one threading hole 41 is respectively arranged at the left side and the right side of the protection box 4, the wiring is more convenient by arranging the threading holes at the two sides, and the potential safety hazard caused by the fact that the wires are too close is avoided; a primary terminal 3 is arranged on the mounting part 23, the isolation parts 24 are positioned at the edges of the front side and the rear side of the mounting part 23, the primary terminal 3 is positioned between the two isolation parts 24, the upper surface of the primary terminal 3 protrudes out of the upper surface of the mounting part 23, and the protruding height is not less than 1 mm; the bottom plate 1 is installed at the bottom of the pouring body 2 through a connecting bolt 5, a grounding bolt 5 is further arranged on the left side of the bottom plate 1, the grounding bolt 5 is electrically connected with a winding coil inside the pouring body 2, and mounting holes 11 are formed in four top corners of the bottom plate 1.

As shown in fig. 1 and 2, the canopy insulating portion 22 is composed of a first canopy section 221, a second canopy section 222, a third canopy section 223, and a fourth canopy section 224, a lower end of the first canopy section 221 is connected to an upper end of the support portion 21, lengths of the first, second, third, and

fourth canopy sections

221, 222, 223 are identical to each other, widths of the second, first, third, and

fourth canopy sections

222, 221, 223, 224 are decreased, and an upper end of the fourth canopy section 224 is connected to a lower end of the mounting portion 23.

Preferably, the longitudinal sections of the first shed section 221, the second shed section 222 and the fourth shed section 224 are rectangular; the longitudinal section of the third shed section 223 is trapezoidal, the larger end of the third shed section 223 is connected to the second shed section 222, and the smaller end of the third shed section 223 is connected to the fourth shed section 224.

This application is through the setting of the first full skirt section 221, second full skirt section 222, third full skirt section 223 and fourth full skirt section 224 of the different width of the same length, thereby effectively reduced the shared volume of this current transformer, thereby it is more convenient to make its installation use, simultaneously effectively increased the creepage distance between primary terminal 3 and the secondary terminal in addition, make this current transformer's insulation more stable, product quality and performance are higher.

The technical scheme provided by the utility model is introduced in detail above. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims

1. The utility model provides a pillar type current transformer which characterized in that: the umbrella skirt insulation structure comprises a pouring body, wherein the pouring body is composed of a supporting part, an umbrella skirt insulation part, an installation part and an isolation part which are concentrically arranged from bottom to top, an accommodating cavity is formed in the front side wall of the supporting part, a nameplate is installed in the accommodating cavity, a secondary terminal is arranged on the left side wall of the supporting part, a protection box covers the upper part of the secondary terminal, the protection box is fixedly connected with the supporting part through screws, a primary terminal is arranged on the installation part, the isolation part is located on the edges of the front side edge and the rear side edge of the installation part, and the primary terminal is located between the two isolation parts;

2. The leg type current transformer according to claim 1, wherein: the longitudinal sections of the first umbrella skirt section, the second umbrella skirt section and the fourth umbrella skirt section are rectangular.

3. The leg type current transformer according to claim 2, wherein: the longitudinal section of the third umbrella skirt section is trapezoidal, the larger end of the third umbrella skirt section is connected with the second umbrella skirt section, and the smaller end of the third umbrella skirt section is connected with the fourth umbrella skirt section.

4. The leg type current transformer according to claim 1, wherein: the projection area of the supporting part in the vertical direction is smaller than that of the umbrella skirt insulating part in the vertical direction.

5. The leg type current transformer according to claim 1, wherein: the left side and the right side of the protection box are respectively provided with at least one threading hole.

6. The leg type current transformer according to claim 1, wherein: the upper surface of the primary terminal protrudes out of the upper surface of the mounting part.

7. The pillar type current transformer according to any one of claims 1 to 6, wherein: the transformer winding device is characterized by further comprising a bottom plate, wherein the bottom plate is installed at the bottom of the pouring body through a connecting bolt, a grounding bolt is further arranged on the left side of the bottom plate, and the grounding bolt is electrically connected with a winding coil inside the pouring body.