Three-phase mutual inductor with clamping seat

Abstract

The utility model discloses a three-phase mutual inductor with a clamping seat, which comprises a shell and is characterized in that the cross section of the shell is I-shaped, a mounting cavity is arranged at the bottom end of the I-shaped shell, a three-phase mutual inductor is arranged in the mounting cavity, the clamping seat is arranged outside the mounting cavity, an electric energy meter connecting terminal is arranged on the clamping seat, and the three-phase mutual inductor is connected with the clamping seat. The three-phase mutual inductor is electrically connected with the electric energy meter connecting terminal, and the problems that the installation process of an existing three-phase mutual inductor is too tedious, the reliability of a wire connection mode is poor, and installation workers are prone to connecting wires wrongly are solved.

Description

Technical Field

[0001] The utility model relates to the field of mutual inductors, and more specifically to a three-phase mutual inductor with a card seat. Background Art

[0002] The demand for electricity in China and even the world is increasing. In the power industry, the application of electricity meters is ubiquitous. With the development, upgrading and transformation of the national power system, the demand for electricity meters has also increased rapidly; and the country implements unified bidding for electricity meters, making the cost pressure of each manufacturer increase day by day. The current electricity meter generally consists of a meter case, a terminal block, a PCB board, a relay and a mutual inductor, where the meter case is composed of a base and an upper case.

[0003] The existing mutual inductors are usually installed on the PCB board of the electricity meter and then connected to the electricity meter installed on the terminal block through wires. This makes the overall installation process too cumbersome, and the wire connection method has poor reliability. Installation workers are prone to misconnect wires, so it is necessary to design a mutual inductor with a card seat. Summary of the Utility Model

[0004] Aiming at the deficiencies of the existing technology, the utility model provides a three-phase mutual inductor with a card seat, which solves the problems that the installation process of the existing three-phase mutual inductor is too cumbersome, the wire connection method has poor reliability, and installation workers are prone to misconnect wires.

[0005] To achieve the above object, the utility model provides the following technical solution: A three-phase mutual inductor with a card seat, including a housing, the cross-section of the housing is set as an "I" shape, an installation cavity is arranged at the bottom end of the "I" shape of the housing, a three-phase mutual inductor is arranged in the installation cavity, a card seat is arranged outside the installation cavity, a electricity meter connection terminal is arranged on the card seat, and the three-phase mutual inductor is electrically connected to the electricity meter connection terminal.

[0006] The utility model is further set as: Concave support plates are arranged on both sides of the housing, a meter fixing table and a plurality of fixing holes are arranged on the support plates, and auxiliary holes are arranged at both sides of the bottom of the housing close to the card seat.

[0007] The utility model is further set as: Four wiring pieces are arranged in the housing, the wiring pieces penetrate through the whole housing from the middle, and a plurality of the fixing holes are arranged at the intervals between the wiring pieces.

[0008] The utility model is further set as: Fixing bosses adapted to the wiring pieces are respectively arranged at the upper and lower ends of the housing, and the surfaces of the fixing bosses are inclined from the center to the periphery.

[0009] The utility model is further set as: A set screw nut is embedded in the meter fixing table, and the set screw nut is made of a metal material.

[0010] In summary, the utility model has the following beneficial effects:

[0011] 1. Compared with the prior art, in this three-phase mutual inductor with a card holder, the mutual inductor is arranged inside the housing, and an electric meter installation card holder is arranged at the bottom of the housing. Electric meter connection terminals are arranged on the card holder and are electrically connected to the mutual inductor, so that the electric meter can be connected to the mutual inductor only by inserting it into the electric meter connection terminals, and thus there is no need to use additional wires for connection. Therefore, installers do not need to make additional wiring, which improves the installation efficiency.

[0012] 2. Compared with the prior art, the original mounting plate and the mutual inductor are combined, thus saving internal space. The internal components can be installed on the mounting plate of the mutual inductor housing, making the installation combination more compact and saving space. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic three-dimensional structure diagram of this embodiment;

[0014] Figure 2 is Figure 1 a partial enlarged schematic view of A;

[0015] Figure 3 is a schematic internal structure diagram of this embodiment.

[0016] Reference numerals: 1, housing; 2, installation cavity; 3, three-phase mutual inductor; 4, card holder; 5, electric energy meter connection terminal; 6, support plate; 7, electric meter fixing table; 8, fixing hole; 9, auxiliary hole; 10, wiring piece; 11, fixing boss; 12, set screw nut. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The following further describes the present utility model in detail with reference to the drawings.

[0018] This embodiment discloses a three-phase mutual inductor with a card holder, as Figures 1-3As shown in the figure, it includes a housing 1. The cross-section of the housing 1 is set in an "I" shape. An installation cavity 2 is provided at the bottom of the "I" shape of the housing 1. A three-phase current transformer 3 is arranged in the installation cavity 2. A card holder 4 is arranged outside the installation cavity 2. A watt-hour meter connection terminal 5 is arranged on the card holder 4. The three-phase current transformer 3 is electrically connected to the watt-hour meter connection terminal 5. When the watt-hour meter is inserted into the watt-hour meter connection terminal 5, the current transformer is also connected to the watt-hour meter, so that there is no need to connect with wires externally. The utility model further sets that concave supporting plates 6 are arranged on both sides of the housing 1. Since the cross-section of the housing 1 is set in an "I" shape, the supporting plates 6 are arranged in the middle section of the housing 1. A watt-hour meter fixing platform 7 and several fixing holes 8 are arranged on the supporting plates 6. Auxiliary holes 9 are arranged on both sides of the bottom of the housing 1 close to the card holder 4. Thus, the inwardly concave supporting plates 6 provide an installation space for the installation elements, making the installation of internal elements more compact.

[0019] The utility model further sets that four wiring pieces 10 are arranged in the housing 1. The arranged wiring pieces 10 are connected to the external three-phase power wires. The wiring pieces 10 penetrate through the entire housing 1 from the middle. Several of the fixing holes 8 are arranged at the intervals between the wiring pieces 10. The intervals are set so as not to affect the middle wiring pieces 10.

[0020] The utility model is further set as: fixing bosses 11 adapted to the wiring pieces 10 are respectively arranged at the upper and lower ends of the housing 1. The surface of the fixing bosses 11 is inclined from the center to the periphery. The surface of the fixing bosses 11 being inclined from the center to the periphery can make dust slide downwards, thus making the wire connection more stable.

[0021] The utility model is further set as: a set screw nut 12 is embedded in the watt-hour meter fixing platform 7. The set screw nut 12 is made of metal material. Since the housing 1 is integrally formed by plastic injection molding, the embedded set screw nut 12 made of metal material inside makes the threaded connection more stable and has a longer service life.

[0022] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the design concept of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A three-phase mutual inductor with a card holder, comprising a housing (1), characterized in that: The cross section of the housing (1) is arranged in an "I" shape; a mounting cavity (2) is arranged at the bottom end of the "I" shape of the housing (1); a three-phase mutual inductor (3) is arranged in the mounting cavity (2); a card holder (4) is arranged outside the mounting cavity (2); an electric energy meter connection terminal (5) is arranged on the card holder (4); and the three-phase mutual inductor (3) is electrically connected to the electric energy meter connection terminal (5); The housing (1) is provided with an inwardly concave support plate (6), an electric meter fixing platform (7) and a plurality of fixing holes (8) are provided inside the support plate (6), and auxiliary holes (9) are provided on both sides of the bottom of the housing (1) close to the base (4); Four connecting pieces (10) are arranged in the shell (1), and the connecting pieces (10) penetrate the entire shell (1) from the middle, and a plurality of fixing holes (8) are arranged at intervals between the connecting pieces (10).

2. A three-phase mutual inductor with a card holder according to claim 1, characterized in that: The upper and lower ends of the housing (1) are respectively provided with fixing bosses (11) adapted to the wiring piece (10), and the surface of the fixing boss (11) is inclined from the center to the surrounding areas.

3. A three-phase mutual inductor with a card holder according to claim 1, characterized in that: A fixing nut (12) is embedded in the electric meter fixing platform (7), and the fixing nut (12) is made of metal material.

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