CN219085756U

CN219085756U - Current transformer installation module structure for electronic molded case circuit breaker

Info

Publication number: CN219085756U
Application number: CN202223142902.8U
Authority: CN
Inventors: 赵瑞峰; 孙亚洲; 许卓皇
Original assignee: Shanghai Renmin Electrical Apparatus Works Co Ltd
Current assignee: Shanghai Renmin Electrical Apparatus Works Co Ltd
Priority date: 2022-11-25
Filing date: 2022-11-25
Publication date: 2023-05-26
Anticipated expiration: 2032-11-25

Abstract

The utility model relates to a current transformer installation module structure for an electronic molded case circuit breaker, which comprises a current transformer (1), a cover (2), a base (3) and a bracket (6), wherein a plurality of independent installation cavities are arranged in the base (3), the current transformer (1) is installed in each independent installation cavity, a shell (5) for insulation protection is arranged outside the current transformer (1), and the bracket (6), the cover (2), the shell (5), the current transformer (1) and the base (3) are assembled in sequence from top to bottom to form a current transformer installation module, and the current transformer installation module is installed on a base (7) of the circuit breaker. The utility model provides a current transformer installation module structure which is convenient in installation process and simple in overall structure, and ensures that a current transformer provides more accurate current data.

Description

Current transformer installation module structure for electronic molded case circuit breaker

Technical Field

The utility model relates to the technical field of piezoelectric devices, in particular to a current transformer installation module structure for an electronic molded case circuit breaker.

Background

Plastic case circuit breakers have been widely used as one of the main protection appliances in low voltage distribution lines. However, along with the improvement of social production and living standard, people put forward higher requirements on the safety, reliability and accuracy of electricity consumption, and simultaneously put forward corresponding requirements on small size, modularized assembly and the like of the molded case circuit breaker. In recent years, electronic technology is gradually applied to molded case circuit breaker products and greatly developed, and the electronic technology is mainly applied to a characteristic protection system of the molded case circuit breaker and mainly comprises a current transformer, an intelligent controller and a magnetic flux converter. The current transformer is a current signal acquisition unit, the intelligent controller is a signal analysis and comparison unit, and the magnetic flux converter is a tripping execution unit. The current transformer is an instrument for converting primary side large current into secondary side small current to measure according to an electromagnetic induction principle, and consists of a closed iron core and windings, wherein the number of turns of the primary side windings is small, and the primary side windings are connected in series in a circuit of current to be measured.

The existing current transformer is complex in structure, inconvenient to install and unreasonable in circuit arrangement, and the precision, reliability and consistency of the current transformer are interfered, so that the circuit breaker is finally affected.

The utility model provides a current transformer structure for a molded case circuit breaker in China, which is disclosed as CN202126922U, and comprises a base and a cover plate, wherein a movable contact and a current transformer are arranged in the base, the base is connected with the cover plate through screws, a groove and a fixing hole are further formed in the base, a boss and a pin are arranged on the cover plate, the boss corresponds to the groove, and the pin corresponds to the fixing hole. The current transformer structure for the plastic shell circuit breaker is provided with the groove and the fixing hole on the base, and the cover plate is provided with the corresponding boss and the pin, so that the reliability of the matching between the cover plate and the base can be effectively improved, the accuracy, the linearity and the consistency of the current transformer are further improved, and the current transformer structure for the plastic shell circuit breaker is convenient to assemble, simple in structure and suitable for batch processing and manufacturing. However, in this patent, the phases of the circuit breaker are not completely separated, nor are the transformers completely separated, affecting the independent operation between the phases and the current transformers and further affecting the accuracy of the current data provided by the current transformers.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art and provide the current transformer installation module structure which is convenient in installation process, simple in overall structure and capable of ensuring that a current transformer provides more accurate current data.

The aim of the utility model can be achieved by the following technical scheme:

the utility model provides a current transformer installation module structure for electronic type moulded case circuit breaker, includes current transformer, lid, base, support, be equipped with a plurality of independent installation cavity in the base, the current transformer is installed in each independent installation cavity, the shell that is used for insulating protection is equipped with outward to the current transformer, support, lid, shell, current transformer and base assemble according to top-down's order and constitute current transformer installation module, current transformer installation module installs on the base of circuit breaker.

Further, a wire outlet hole A is formed in the cover, a wire outlet hole B is formed in the shell, and wiring is arranged through the wire outlet hole A and the wire outlet hole B.

Further, the electronic molded case circuit breaker is a three-phase circuit breaker and comprises an A phase, a B phase and a C phase, wherein wire holes A corresponding to the A phase and the B phase are arranged on the right side of the installation cavity, and wire holes A corresponding to the C phase are arranged on the left side of the installation cavity.

Further, be equipped with a plurality of line concentration card mouthfuls that are used for arranging the line on the support, line concentration bayonet socket is the buckle that is used for the fixed line to arrange, and line concentration card mouthful is used for the trend of arrangement restriction pencil, conveniently arranges the line.

Further, grooves are formed in two sides of the cover.

Further, the grooves are matched with the shape of the edges of the shell, so that the assembly between the cover and the shell of the current transformer is facilitated.

Further, a partition plate is arranged between each two installation cavities in the base, so that direct contact between the current transformer and the connecting row is avoided.

Further, a connecting row is arranged on one side of the current transformer, and the current transformer is connected with the connecting row through screws.

Further, a wire harness is arranged on the current transformer and is connected with the control circuit board.

Further, the cover and the base are fixedly connected through a plurality of screws.

Compared with the prior art, the utility model has the following advantages:

the complex current transformers are used as independent installation modules, the complex current transformers can be reasonably installed in the base according to the pole number of an actual breaker, then the complex current transformers are integrally installed in the base of the breaker, each current transformer is provided with an independent shell and a wire harness, direct contact of the current transformers and a connecting row can be avoided, influence of temperature rise of the connecting row on the current transformers is reduced, the current transformers are guaranteed to provide more accurate current data during working, the installation process is convenient, the overall structure is simple, and the installation efficiency is effectively improved.

Drawings

FIG. 1 is a schematic diagram of a current transformer according to the present utility model;

FIG. 2 is an exploded perspective view of the mounting module of the present utility model;

FIG. 3 is a schematic view of the structure of the base of the present utility model;

FIG. 4 is a schematic diagram of the structure of the present utility model;

FIG. 5 is a schematic diagram of an embodiment of the present utility model;

fig. 6 is a schematic view of the positioning of the present utility model in a molded case circuit breaker.

In the figure: 1. the current transformer comprises a current transformer body, 11, a wire harness, 2, a cover, 21, wire outlet holes A,3, a base, 31, a partition board, 4, a connecting row, 5, a shell, 51, wire outlet holes B,6, a bracket, 61, wire collecting bayonets, 7 and a base.

Detailed Description

The utility model will now be described in detail with reference to the drawings and specific examples.

Examples

As shown in fig. 5, a current transformer installation module structure for an electronic molded case circuit breaker comprises a current transformer 1, a cover 2, a base 3 and a bracket 6, wherein independent installation cavities are arranged in each phase in the base 3, and the cover 2 is fixedly connected with the base 3 through a plurality of tapping screws so as to increase the connection strength. In this embodiment, the number of screws is 4. The current transformer 1 is installed in each independent installation cavity, a shell 5 for insulation protection is arranged outside the current transformer 1, the shell plays a role in fixing and protecting the current transformer 1, interference of temperature rise between each phase of current and a connecting row is avoided, a support 6, a cover 2, the current transformer 1, the shell 5 and a base 3 are assembled in sequence from top to bottom to form a current transformer installation module, and as shown in fig. 6, the current transformer installation module is installed on a base 7 of the circuit breaker. In the practical operation, the number of the current transformers 1 can be reasonably adjusted according to the number of poles of the practical circuit breaker, and in the embodiment, the circuit breaker is a three-phase molded case circuit breaker.

As shown in fig. 1, a wire harness 11 is provided on the current transformer 1, and the wire harness 11 is connected with a control circuit board. Each current transformer 1 is provided with an independent shell 5 and a wire harness 11, so that direct contact between the current transformers 1 and the connecting row 4 can be avoided, influence of temperature rise of the connecting row on the current transformers is reduced, and the current transformers are ensured to provide more accurate current data during working.

As shown in fig. 2, the circuit breaker is sequentially provided with a phase a, a phase B and a phase C from left to right in the drawing, as shown in fig. 3, a wire outlet hole a21 is formed in the cover 2 at a position corresponding to the mounting cavity where each phase is located, and a wire outlet hole B51 is correspondingly formed in the housing 5. As shown in fig. 5, the support 6 is provided with a plurality of wire collecting ports 61 for arranging wires, the wire collecting ports 61 are buckles for fixing wire rows, and the wire collecting ports 61 are used for arranging and limiting the trend of the wire harness 11, so that the wires are conveniently arranged. Each current transformer 1 is provided with an independent wire harness 11, the wire harnesses are arranged along the wire collecting port 61 of the support through the wire outlet hole A21 and the wire outlet hole B51, and finally the wire harnesses are connected with the controller to send current collection signals to the control circuit board. In actual operation, the opening position of the wire outlet hole A21 can be reasonably adjusted according to actual needs. In this embodiment, the opening positions of the two corresponding wire outlet holes a21 of A, B are close to the right side of the installation cavity, and the opening positions of the wire outlet holes a21 of C are close to the left side of the installation cavity, and are gathered with the wire harness 11 of the front two phases to one place, so that the connection of the control circuit board is facilitated.

As shown in fig. 5, grooves are formed on two sides of the cover 2, and the grooves are matched with the edge shape of the shell 5, so that the assembly between the cover and the current transformer shell is facilitated. As shown in fig. 4, a partition plate 31 is arranged between the installation cavities in the base 3 to avoid direct contact between the current transformer and the connection row. As shown in fig. 2, a connection row 4 is arranged on one side of the current transformer 1, and the current transformers 1 are connected with the connection row 4 through screws, and as each current transformer is provided with an independent shell 5 and a wire harness 11, the direct contact between the current transformer 1 and the connection row 4 can be avoided, and the influence of temperature rise of the connection row 4 on the current transformer 1 is reduced.

The previous description of the embodiments is provided to facilitate a person of ordinary skill in the art in order to make and use the present utility model. It will be apparent to those skilled in the art that various modifications can be readily made to these embodiments and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present utility model is not limited to the above-described embodiments, and those skilled in the art, based on the present disclosure, should make improvements and modifications without departing from the scope of the present utility model.

Claims

1. The utility model provides a current transformer installation module structure for electronic type moulded case circuit breaker, includes current transformer (1), lid (2), base (3), support (6), be equipped with a plurality of independent installation cavity in base (3), current transformer (1) are installed in each independent installation cavity, a serial communication port, current transformer (1) are equipped with shell (5) that are used for insulating protection outward, support (6), lid (2), shell (5), current transformer (1) and base (3) assemble according to top-down's order and constitute current transformer installation module, current transformer installation module installs on the base (7) of circuit breaker.

2. The current transformer mounting module structure for the electronic molded case circuit breaker according to claim 1, wherein the cover (2) is provided with a wire outlet hole a (21), the housing (5) is provided with a wire outlet hole B (51), each mounting cavity is correspondingly provided with the wire outlet hole a (21) and the wire outlet hole B (51), and wiring is arranged through the wire outlet hole a (21) and the wire outlet hole B (51).

3. The current transformer mounting module structure for the electronic molded case circuit breaker according to claim 2, wherein the electronic molded case circuit breaker is a three-phase circuit breaker, and comprises an a phase, a B phase and a C phase, wherein wire holes a (21) corresponding to the a phase and the B phase are arranged on the right side of a mounting cavity, and wire holes a (21) corresponding to the C phase are arranged on the left side of the mounting cavity.

4. The current transformer installation module structure for the electronic molded case circuit breaker according to claim 1, wherein a plurality of wire collecting ports (61) for arranging wires are arranged on the support (6), and the wire collecting ports (61) are buckles for fixing wire rows.

5. A current transformer mounting module structure for an electronic molded case circuit breaker according to claim 1, wherein both sides of the cover (2) are provided with grooves.

6. A current transformer mounting module structure for an electronic molded case circuit breaker according to claim 5, wherein the recess is matched with the shape of the edge of the case (5).

7. A current transformer mounting module structure for an electronic molded case circuit breaker according to claim 1, wherein a partition (31) for avoiding direct contact of the current transformer with the connection row is provided between the mounting cavities in the base (3).

8. The current transformer installation module structure for the electronic molded case circuit breaker according to claim 1, wherein a connection row (4) is arranged on one side of the current transformer (1), and the current transformer (1) is connected with the connection row (4) through screws.

9. The current transformer installation module structure for the electronic molded case circuit breaker according to claim 1, wherein a wire harness (11) is arranged on the current transformer (1), and the wire harness (11) is connected with a control circuit board.

10. The current transformer mounting module structure for an electronic molded case circuit breaker according to claim 1, wherein the cover (2) and the base (3) are fixedly connected by a plurality of screws.