A current transformer

Abstract

The utility model relates to a current transformer technical field, concretely is a kind of current transformer, the utility model includes mutual inductor body, and the wire holder is fixed on mutual inductor body bottom, and multiple groups of wire post for connecting terminal lug connection are equipped on wire holder, and locking nut for extruding terminal lug is screw-mounted on wire post, protective cover for covering wire post is equipped on wire holder, baffle one is slidably installed at the front end of protective cover, baffle two is slidably installed at the top of protective cover, baffle one and baffle two are installed cooperation, and baffle two side surface and protective cover are engaged cooperation;By setting protective cover, multiple groups of wire post are completely covered in, effectively isolate the influence of dust and other external environmental factors, prevent the oxidation and short circuit of wire post, at the same time, protective cover isolates electrified part from outside, eliminates the risk of personnel miscontact, greatly improves electric safety.

Description

Technical Field

[0001] This utility model relates to the field of current transformers, specifically a current transformer. Background Technology

[0002] Current transformers are key devices used for measurement, protection, and control in power systems. They convert large primary currents into smaller secondary currents through electromagnetic induction to facilitate the connection of instruments and relays. In practical applications, the secondary side of a current transformer needs to be connected to external cables via a terminal block.

[0003] Traditional current transformer terminals are usually directly exposed, with their terminals secured by lock nuts. Exposed terminals and metal parts are prone to oxidation or short circuits due to dust intrusion, leading to current transformer failure. Furthermore, during installation or maintenance, operators may accidentally touch live terminals, posing a risk of electric shock. Therefore, a new type of current transformer is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a current transformer to solve the problems mentioned in the background art.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] A current transformer includes a transformer body, a terminal block fixedly connected to the bottom of the transformer body, a plurality of terminals for connecting terminals are provided on the terminal block, locking nuts for pressing the terminals are threaded on the terminals, a protective cover for covering the terminals is provided on the terminal block, a baffle plate slidably installed at the front end of the protective cover, a baffle plate 2 slidably installed at the top of the protective cover, the baffle plate 1 and the baffle plate 2 are installed and cooperate, and the side of the baffle plate 2 is engaged with the protective cover.

[0007] Preferably, the terminal block has an upper mounting groove, the bottom of the protective cover is inserted into the mounting groove, and the terminal block has a locking hole on the side, the locking hole penetrates the protective cover, and a screw is threaded into the locking hole, with the end of the screw penetrating the protective cover.

[0008] Preferably, the protective cover has a wiring port at the front end, and the protective cover has a sliding groove 1 and a sliding groove 2. The lower end of the baffle slides vertically in the sliding groove 1 to close the wiring port. The baffle 1 has a wire hole for accommodating cables, and the baffle 2 slides horizontally on the sliding groove 2 to close the upper end of the protective cover.

[0009] Preferably, a top plate is fixedly connected to the upper end of the baffle, the top plate is located at the upper end of the protective cover, and multiple sets of inserts are fixedly connected to the lower end of the top plate, all of which are inserted into the baffle.

[0010] Preferably, the front end of the protective cover has a slot that is connected to a sliding groove, and a slot is provided on the baffle. An elastic plate is fixedly connected in the slot, and the elastic plate engages with the slot.

[0011] Preferably, the transformer body has a skirt on its side wall and a groove on its top.

[0012] The beneficial effects of this utility model are:

[0013] 1. This utility model, by setting a protective cover, completely encloses multiple sets of terminals, effectively isolating them from the influence of external environmental factors such as dust, preventing oxidation and short circuits of the terminals. At the same time, the protective cover isolates the live parts from the outside, eliminating the risk of accidental contact by personnel and greatly improving electrical safety.

[0014] 2. This utility model has a protective cover with a first baffle and a second baffle that are slidably installed at the front and top of the cover respectively. The two baffles work together to open and close the protective cover. When wiring, the first baffle and the second baffle can be slid open to provide sufficient operating space. After wiring is completed, they can be closed. The operation is simple. The wire hole on the first baffle can allow the cable to pass through and can also seal the wiring port to the maximum extent to prevent foreign objects from entering. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the main structure of the current transformer of this utility model;

[0017] Figure 2 This is a schematic diagram of the terminal block structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the assembly structure of the protective cover of this utility model;

[0019] Figure 4 This is a cross-sectional structural diagram of the protective cover of this utility model;

[0020] The attached figures are labeled as follows:

[0021] 1. Current transformer body; 2. Groove; 3. Umbrella skirt; 4. Terminal block; 5. Terminal post; 6. Locking nut; 7. Terminal head; 8. Mounting groove; 9. Locking hole; 10. Protective cover; 11. Screw; 12. Wiring port; 13. Slide groove one; 14. Slide groove two; 15. Bayonet; 16. Baffle one; 17. Top plate; 18. Elastic retaining plate; 19. Insert post; 20. Baffle two; 21. Wire hole. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0023] A type of current transformer, such as Figures 1-4 As shown, the device includes a current transformer body 1, which contains windings. A terminal block 4 is fixedly connected to the bottom of the current transformer body 1. The terminal block 4 serves as an integrated platform for all electrical connections. The terminal block 4 has multiple sets of terminals 5 for connecting terminals 7. These terminals 5 are used to connect terminals 7 from secondary cables of measuring instruments or protection devices. Locking nuts 6 are threaded onto the terminals 5 to compress the terminals 7. By tightening the locking nuts 6, a strong mechanical compression can be generated on the terminals 7 inserted into the terminals 5 to prevent the terminals 7 from falling off. The terminal block 4 is provided with a protective cover 10 for covering the terminals 5. A baffle 16 is slidably installed at the front end of the protective cover 10, and a baffle 20 is slidably installed at the top of the protective cover 10. The baffle 16 and the baffle 20 are installed and cooperate with each other, and the side of the baffle 20 is engaged with the protective cover 10.

[0024] By setting up a protective cover 10, multiple sets of terminals 5 are completely enclosed, effectively isolating them from the influence of external environmental factors such as dust, preventing oxidation and short circuits of the terminals 5. At the same time, the protective cover 10 isolates the live parts from the outside, eliminating the risk of accidental contact by personnel (even during planned power outages, protective measures must be taken, as the power system is very complex and there may be risks of accidental power supply, reverse power supply, or accidental induced electricity; strict procedures are the last line of defense against these accidents), greatly improving electrical safety.

[0025] The terminal block 4 has a mounting groove 8 at its upper end. The bottom of the protective cover 10 is inserted into the mounting groove 8. The terminal block 4 has a locking hole 9 on its side. The locking hole 9 passes through the protective cover 10. A screw 11 is installed in the internal thread of the locking hole 9. The end of the screw 11 passes through the protective cover 10. The protective cover 10 is inserted and installed on the terminal block 4. After insertion, the screw 11 is turned in alignment with the locking hole 9. The inner wall of the locking hole 9 is threaded. The screw 11 locks the protective cover 10 and the terminal block 4 to prevent the protective cover 10 from falling off. The protective cover 10 can be removed by unscrewing the screw 11.

[0026] The protective cover 10 has a wiring port 12 at the front end. The protective cover 10 has a sliding groove 13 and a sliding groove 14. The lower end of the baffle 16 slides vertically in the sliding groove 13 to close the wiring port 12. The baffle 16 has a wire hole 21 for accommodating cables. The baffle 20 slides horizontally on the sliding groove 24 to close the upper end of the protective cover 10.

[0027] The sliding baffle 16 and baffle 20 open the upper and front ends of the protective cover 10, providing sufficient operating space for the installation of the connector 7 and the terminal 5, and also for the use of external tools to tighten the locking nut 6. After the wiring is completed, they are closed. The wire hole 21 on the baffle 16 allows the cable to pass through while sealing the connector 12 to the maximum extent to prevent foreign objects from entering.

[0028] A top plate 17 is fixedly connected to the upper end of the baffle 16. The top plate 17 is located above the protective cover 10. Multiple sets of inserts 19 are fixedly connected to the lower end of the top plate 17. All sets of inserts 19 are inserted into the baffle 20. The top plate 17 pulls the baffle 16 to slide up and down, and the inserts 19 are inserted into the baffle 20, so that the baffle 20 cannot be removed from the protective cover 10.

[0029] The protective cover 10 has a slot 15 at its front end, which is connected to the slide groove 13. The baffle 16 has a slot, and an elastic plate 18 is fixedly connected in the slot (the elastic plate 18 is arc-shaped, with one end fixed to the inner wall of the slot and the other end located in the slot and not connected to the slot). The elastic plate 18 engages with the slot 15. When the baffle 16 slides down, it compresses the elastic plate 18. After the sliding ends, the elastic plate 18 returns to its original shape and engages with the inner wall of the slot 15, so that the baffle 16 cannot slide relative to the protective cover 10 without the action of external force.

[0030] The current transformer body 1 has a skirt 3 on its side wall and a groove 2 on its top. The skirts 3 are distributed around the current transformer body 1, which can increase the creepage distance between high and low voltage and effectively reduce the vertical height of the product. The skirts 3 are of the same size, which makes the electric field distribution uniform and effectively reduces the partial discharge value of the product. The groove 2 can increase the heat dissipation area of ​​the current transformer.

[0031] The working principle of the current transformer provided by this utility model is as follows:

[0032] The protective cover 10 securely covers the entire wiring area with screws 11. Both baffle 16 and baffle 20 are closed and locked, forming a closed protective shell that effectively prevents the intrusion of dust and other foreign objects and prevents personnel from accidentally touching the terminal 5. When wiring or maintenance is required, baffle 16 must be pulled upwards and baffle 20 must be pulled horizontally to access the terminal 5 for operation. This facilitates operation and enhances the safety awareness of the operators.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A current transformer, comprising a transformer body (1), characterized in that, The transformer body (1) is fixedly connected to a terminal block (4) at the bottom. The terminal block (4) is provided with multiple sets of terminals (5) for connecting the terminals (7). Locking nuts (6) for squeezing the terminals (7) are threaded on the terminals (5). The terminal block (4) is provided with a protective cover (10) for covering the terminals (5). A baffle (16) is slidably installed at the front end of the protective cover (10). A baffle (20) is slidably installed at the top of the protective cover (10). The baffle (16) and the baffle (20) are installed and cooperated. The side of the baffle (20) is engaged with the protective cover (10).

2. A current transformer according to claim 1, characterized in that, The terminal block (4) has an installation groove (8) at its upper end. The bottom of the protective cover (10) is inserted into the installation groove (8). The terminal block (4) has a locking hole (9) on its side. The locking hole (9) passes through the protective cover (10). A screw (11) is threaded into the locking hole (9). The end of the screw (11) passes through the protective cover (10).

3. A current transformer according to claim 1, characterized in that, The protective cover (10) has a wiring port (12) at the front end. The protective cover (10) has a sliding groove 1 (13) and a sliding groove 2 (14). The lower end of the baffle 1 (16) slides vertically in the sliding groove 1 (13) to close the wiring port (12). The baffle 1 (16) has a wire hole (21) for accommodating the cable. The baffle 2 (20) slides horizontally on the sliding groove 2 (14) to close the upper end of the protective cover (10).

4. A current transformer according to claim 3, characterized in that, The upper end of the first baffle (16) is fixedly connected to a top plate (17), which is located on the upper end of the protective cover (10). The lower end of the top plate (17) is fixedly connected to multiple sets of inserts (19), which are all inserted into the second baffle (20).

5. A current transformer according to claim 1, characterized in that, The protective cover (10) has a slot (15) at the front end, which is connected to the slide groove (13). The baffle (16) has a slot, and an elastic plate (18) is fixed in the slot. The elastic plate (18) engages with the slot (15).

6. A current transformer according to claim 1, characterized in that, The transformer body (1) has a skirt (3) on its side wall and a groove (2) on its top.

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