Integrated double-current-transformer module

Abstract

The integrated double-current-transformer module comprises a mounting seat, a plurality of mounting grooves are formed in the mounting seat, threading holes communicated with the mounting grooves are formed in the front side of the mounting seat, slots communicated with the mounting grooves are formed in the upper end of the mounting seat, and a notch is formed in one side of the upper end of the mounting seat; the current transformer is arranged in the mounting groove; the metering transformer is arranged in the mounting groove, and the metering transformer and the current transformer are concentrically arranged; the metering circuit board is inserted into the space formed by the slots and is electrically connected with the current transformer and the metering transformer in the corresponding mounting grooves, one end of the metering circuit board is provided with a wiring terminal, the wiring terminal is exposed out of the mounting seat through the notch, and the wiring terminal is electrically connected with the current transformer and the metering transformer in the corresponding mounting grooves. And the current transformer, the metering transformer and the metering circuit board are fixed in the mounting groove through glue pouring. A metering mutual inductor and a current mutual inductor are integrally designed, wire harnesses of the mutual inductor are collected through a metering circuit board by means of a built-in metering circuit board and then are output through a single interface, the number of external wire harnesses is reduced, and internal wiring is more concise.

Description

Technical Field

[0001] The utility model specifically relates to an integrated dual current transformer module. Background Art

[0002] The existing circuit breakers with electric energy metering are three-phase three-wire electronic circuit breakers with intelligent control and electric energy metering functions added.

[0003] In order to achieve electric energy metering, the usual practice is to install a current transformer for detecting current information on each phase line, that is, three current transformers for the three-phase main lines to pass through need to be installed in the circuit breaker housing, and then the output circuits of these three current transformers are connected to the circuit board through soft connections. The circuit board also needs to be electrically connected to the main control circuit board in the circuit breaker housing. The lack of installation positioning measures will cause the current transformer to shake and shift inside the circuit breaker, resulting in poor installation stability.

[0004] In order to solve the above problems, some existing measures are to design a accommodating groove that forms a limit fit with the shell, install the current transformer in the accommodating groove, and fix it into an integrated structure by means of glue filling, and expose the wiring terminals on the accommodating groove to facilitate the connection of the internal current transformer signal with the external circuit board. However, the existing accommodating groove is only used to accommodate the current transformer. For example, Chinese patent CN220895427U discloses a transformer installation structure for a circuit breaker. Since the circuit boards are all externally installed and each current transformer requires a terminal to be led out, it will cause too many internal wiring harnesses, affecting the installation. Utility Model Content

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide an integrated dual current transformer module.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] An integrated dual current transformer module, comprising:

[0008] A mounting seat detachably arranged in the circuit breaker housing, which is provided with a plurality of mounting slots arranged at intervals, and a threading hole connected to the mounting slots is provided on the front side of the mounting seat, the opening of the mounting slots is arranged on the rear side of the mounting seat, and a slot connected to each mounting slot is provided at the upper end of the mounting seat, and a notch is provided on one side of the upper end of the mounting seat;

[0009] A current transformer is arranged in the installation slot;

[0010] A metering transformer is arranged in the installation groove and is arranged concentrically with the current transformer;

[0011] A metering circuit board is inserted into the space formed by the slots and is electrically connected to the current transformer and the metering transformer in the corresponding mounting slots respectively. A wiring terminal is provided at one end of the metering circuit board, and the wiring terminal is exposed from the mounting seat through the notch.

[0012] The current transformer, the metering transformer and the metering circuit board are fixed in the installation groove by filling glue.

[0013] A guide column extending along the axial direction of the threading hole is arranged in the installation groove, the current transformer and the metering transformer are sleeved on the guide column, and the threading hole passes through the guide column.

[0014] An arc-shaped wall is arranged in the installation groove along the outer side of the guide column, and a gap adapted to a current transformer or a metering transformer is formed between the arc-shaped wall and the guide column.

[0015] A retaining wall is arranged in the installation groove corresponding to the wiring terminal of the metering circuit board, and an isolation space is formed between the retaining wall and the inner wall of the installation seat.

[0016] The retaining wall is provided with a slot for the metering circuit board to pass through.

[0017] Beneficial effects of the utility model: The present application integrates the metering transformer and the current transformer into an integrated design, and through a built-in metering circuit board, the wiring harness of the transformer is gathered through the metering circuit board, and then output through a single interface, thereby reducing the number of external wiring harnesses and making the internal wiring simpler. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model.

[0019] Figure 2 It is a structural schematic diagram of the mounting seat of the utility model. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0022] As shown in the figure, the utility model discloses an integrated dual current transformer module, which includes a mounting base, and a metering transformer, a current transformer and a metering circuit board placed in the mounting base, and the three are fixed in the mounting base by glue filling to achieve an integrated design.

[0023] A mounting base 1 detachably arranged in a circuit breaker housing is provided with a plurality of mounting grooves 11 arranged at intervals, and a threading hole 12 communicating with the mounting grooves is provided on the front side of the mounting base, the opening of the mounting groove is arranged on the rear side of the mounting base, and a slot 16 communicating with each mounting groove is provided on the upper end of the mounting base, and a notch 15 is provided on one side of the upper end of the mounting base, the mounting grooves are not connected to each other, and the metering circuit board is inserted only through the slot, so that the wiring harness of the mutual inductor in each mounting groove can be directly welded and fixed to the corresponding position of the metering circuit board.

[0024] A current transformer 2 is arranged in the installation slot;

[0025] The metering transformer 3 is arranged in the installation groove and is concentrically arranged with the current transformer. An insulating structure is provided between the metering transformer and the current transformer. The insulation of the enameled wire of the coil itself can also be directly used to achieve isolation between the two transformers. At the same time, the two are arranged concentrically side by side, which can also reduce the occupied area of ​​the two as much as possible, reduce the volume of the entire dual current transformer module, and adapt to the needs of miniaturization of existing circuit breakers.

[0026] The metering circuit board 4 is inserted into the space formed by the slots and is electrically connected to the current transformer and the metering transformer in the corresponding mounting slots respectively. A wiring terminal is provided at one end of the metering circuit board, and the wiring terminal 41 is exposed from the mounting seat by the notch. The metering circuit board is used for data aggregation and processing of each transformer, and transmits the processed data to the control board of the circuit breaker via the wiring terminal.

[0027] The current transformer, the metering transformer and the metering circuit board are fixed in the installation groove by filling glue.

[0028] A guide column 13 extending axially along the threading hole is provided in the installation groove, the current transformer and the metering transformer are sleeved on the guide column, and the threading hole passes through the guide column to facilitate the passage of the three-phase main line, and the guide column plays a limiting role on the transformer.

[0029] An arc wall 17 is provided in the installation groove along the outer side of the guide column. A gap adapted to the current transformer or metering transformer is formed between the arc wall and the guide column to limit the transformer and prevent the transformer from positional displacement and affecting the metering effect.

[0030] A retaining wall 14 is provided in the mounting groove corresponding to the wiring terminal of the metering circuit board, and an isolation space is formed between the retaining wall and the inner wall of the mounting seat. An isolation space can be formed at the wiring terminal to prevent epoxy resin from leaking therefrom during glue pouring.

[0031] The retaining wall is provided with a slot for the metering circuit board to pass through, and the design of the slot can facilitate the insertion of the metering circuit board from the opening, which is convenient for installation. The metering circuit board is supported and fixed by the slots of each installation slot, which can also ensure that the position of the metering circuit board will not be offset.

[0032] The embodiments should not be regarded as limiting the present invention, but any improvements based on the spirit of the present invention should be within the protection scope of the present invention.

Claims

1. Integrated dual current transformer module, characterized by: It includes: A mounting seat detachably arranged in the circuit breaker housing, which is provided with a plurality of mounting slots arranged at intervals, and a threading hole connected to the mounting slots is provided on the front side of the mounting seat, the opening of the mounting slots is arranged on the rear side of the mounting seat, and a slot connected to each mounting slot is provided at the upper end of the mounting seat, and a notch is provided on one side of the upper end of the mounting seat; A current transformer is arranged in the installation groove; A metering transformer is arranged in the installation groove and is arranged concentrically with the current transformer; A metering circuit board is inserted into the space formed by the slots and is electrically connected to the current transformer and the metering transformer in the corresponding mounting slots respectively. A wiring terminal is provided at one end of the metering circuit board, and the wiring terminal is exposed from the mounting seat through the notch. The current transformer, the metering transformer and the metering circuit board are fixed in the installation groove by filling glue.

2. The integrated dual current transformer module according to claim 1, characterized in that: A guide column extending along the axial direction of the threading hole is arranged in the installation groove, the current transformer and the metering transformer are sleeved on the guide column, and the threading hole passes through the guide column.

3. The integrated dual current transformer module according to claim 2, characterized in that: An arc-shaped wall is arranged in the installation groove along the outer side of the guide column, and a gap adapted to a current transformer or a metering transformer is formed between the arc-shaped wall and the guide column.

4. The integrated dual current transformer module according to claim 1, characterized in that: A retaining wall is arranged in the installation groove corresponding to the wiring terminal of the metering circuit board, and an isolation space is formed between the retaining wall and the inner wall of the installation seat.

5. The integrated dual current transformer module according to claim 4, characterized in that: The retaining wall is provided with a slot for the metering circuit board to pass through.

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