A square open-close type current transformer

Abstract

The utility model discloses a square open and close formula current transformer, including upper casing, upper magnetic core, lower casing, winding magnetic core, wiring terminal still include first connecting assembly and second connecting assembly, and upper casing is connected with lower casing through first connecting assembly and second connecting assembly and is movably connected, supports unilateral open and close and two kinds of mode of bilateral open and close, can choose suitable mode according to installation environment, improves installation flexibility and reliability, design has wire fixing device, can fix current transformer on wire when measuring, prevents the displacement of its and causes the measurement error, design has tamper -resistant lead seal structure, after installing, even if unmounting fixed screw, will also destroy lead seal, thereby guaranteeing the reliability of measurement and tamper -resistant.

Description

Technical Field

[0001] This invention relates to the field of power measurement equipment, and more specifically to a square open-close current transformer. Background Technology

[0002] Traditional current transformers typically employ a closed structure, requiring the circuit to be disconnected during installation, which is difficult to implement and affects power supply continuity. While existing switchable current transformers can avoid power outage installation, they still have shortcomings in structural design, sealing, and ease of installation. Specific shortcomings are as follows:

[0003] 1. Single-sided opening and closing cannot adapt to more complex installation environments;

[0004] 2. After installation, the current transformer cannot be fixed to the cable, resulting in measurement errors;

[0005] 3. Without lead seals, the reliability and tamper-proof nature of the measurement data cannot be guaranteed. Utility Model Content

[0006] The purpose of this utility model is to overcome the defects in the existing technology and provide a square openable current transformer with two opening and closing methods. The appropriate method can be selected according to the installation environment. It is also equipped with a wire fixing device and lead seal, which further improves the installation flexibility and reliability of the equipment.

[0007] To achieve the above objectives, a square open-close current transformer is provided, comprising an upper housing, an upper magnetic core, a lower housing, a wound magnetic core, a coil, and terminals. It also includes a first connecting assembly and a second connecting assembly. The upper housing and the lower housing are movably connected through the first connecting assembly and the second connecting assembly. The upper magnetic core is located inside the upper housing. The wound magnetic core and the lower housing are U-shaped, with the wound magnetic core located inside the lower housing. A coil is wound on the wound magnetic core, and both ends of the coil are connected to the terminals. The terminals pass through the inner wall of the lower housing and are disposed on the outer surface of the lower housing.

[0008] Preferably, the first connecting component is a latch-lock component, including a first rotating shaft, a second rotating shaft, a latch, a locking buckle, and a barb. The locking buckle is connected to the lower housing via the first rotating shaft, the latch and the locking buckle are connected via the second rotating shaft, and the barb is disposed on one side of the upper housing. The latch and the barb cooperate with each other.

[0009] Preferably, the second connecting component is a hinged type, including a screw and a nut.

[0010] Preferably, there is a through hole between the buckle and the barb, and a lead seal is inserted into the through hole. The lead seal can prevent malicious tampering, reduce measurement errors, and thus ensure the reliability and tamper-proof nature of the measurement data.

[0011] Furthermore, a wire fixing device is provided on one side of the lower housing. The wire fixing device includes a male buckle and a female buckle, which cooperate with each other. The female buckle has a threaded through hole, which is horizontal and perpendicular to the direction of the wire passage. An adjusting screw passes through the threaded through hole, and a top plate is provided at one end of the adjusting screw. The wire fixing device can fix the current transformer to the wire to be measured, thereby reducing measurement errors caused by the displacement of the current transformer.

[0012] Furthermore, the terminal block is provided with a fastening screw, and a terminal cover is provided on the outside of the terminal block, which is fastened to the lower housing.

[0013] Preferably, the magnetic cores of the upper magnetic core and the winding magnetic core are composed of multiple silicon steel sheets or nanocrystalline materials to ensure that the current transformer has good measurement accuracy.

[0014] The advantages and beneficial effects of this utility model are as follows:

[0015] 1. The dual-sided opening and closing mechanism can adapt to more complex installation environments;

[0016] 2. The conductor fixing device can fix the current transformer to the cable, reducing measurement errors caused by the displacement of the current transformer;

[0017] 3. It is equipped with a lead seal to ensure the reliability and tamper-proof nature of the measurement data. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the current transformer of this utility model when it is closed;

[0019] Figure 2 This is a schematic diagram of the current transformer of this utility model when it is closed;

[0020] Figure 3 This is a schematic diagram of the structure of the current transformer of this utility model when one side is opened;

[0021] Figure 4 This is a schematic diagram of the current transformer of this utility model when both sides are opened;

[0022] Figure 5 This is a schematic diagram of the wire fixing device of this utility model.

[0023] In the diagram: 1. Upper housing; 11. Upper magnetic core; 2. Lower housing; 21. Winding magnetic core; 4. Terminal block; 41. Fastening screw; 42. Terminal cover; 5. First connecting assembly; 51. First rotating shaft; 52. Second rotating shaft; 53. Buckle; 54. Locking buckle; 55. Barb; 56. Through hole; 6. Second connecting assembly; 61. Screw; 62. Nut; 7. Lead seal; 8. Wire fixing device; 81. Female buckle; 82. Female buckle; 83. Threaded through hole; 84. Adjusting screw; 85. Top plate. Detailed Implementation

[0024] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0025] according to Figures 1-5 As shown, this utility model is a square openable current transformer, including an upper housing 1, an upper magnetic core 11, a lower housing 2, a wound magnetic core 21, and a terminal block 4. It also includes a first connecting component 5 and a second connecting component 6. The upper housing 1 and the lower housing 2 are movably connected by the first connecting component 5 and the second connecting component 6. The upper magnetic core 11 is located inside the upper housing 1. The wound magnetic core 21 and the lower housing 2 are U-shaped. The wound magnetic core 21 is located inside the lower housing 2. A coil is wound on the wound magnetic core 21. The two ends of the coil are respectively connected to the terminal block 4. The terminal block 4 passes through the inner wall of the lower housing 2 and is disposed on the outer surface of the lower housing 2.

[0026] The first connecting component 5 is a latch lock component, including a first rotating shaft 51, a second rotating shaft 52, a latch 53, a locking buckle 54, and a barb 55. The locking buckle 54 is connected to the lower housing 2 through the first rotating shaft 51, the latch 53 is connected to the locking buckle 54 through the second rotating shaft 52, and the barb 55 is disposed on one side of the upper housing 1. The latch 53 and the barb 55 cooperate with each other.

[0027] The second connecting component 6 is a hinged type, including a screw 61 and a nut 62.

[0028] The specific operation method of the first connecting component 5 is as follows: After aligning the upper housing 1 and the lower housing 2, hook 53 is hung on the barb 55 of the upper housing 1. Since the hook 53 and the locking buckle 54 are connected through the second rotating shaft 52, and the locking buckle 54 is connected to the lower housing 2 through the first rotating shaft 51, when the hook 53 is fastened on the barb 55, the locking buckle 54 will rotate upward along the first rotating shaft 51 and form a certain angle with the outer surface of the lower housing 2. After the hook 53 is fastened on the barb 55, press the locking buckle 54 downward. The locking buckle 54 rotates downward around the first rotating shaft 51 until the locking buckle 54 is close to the outer surface of the lower housing 2. At this time, the hook 53 will generate a downward force to pull the barb 55, and the locking buckle 54 will also form a self-locking with the lower housing 2, so that the upper housing 1 and the lower housing 2 fit tightly together. When opening, simply pull the locking buckle 54 to rotate it upward around the first rotation axis 51. At this time, the tension between the buckle 53 and the barb 55 disappears, and the buckle 53 can be disengaged from the barb 55, thereby separating the upper housing 1 from the lower housing 2.

[0029] The specific operation method of the second connecting component 6 is as follows: When the screw 61 passes through the hole of the upper housing 1 and the lower housing 2, and the nut 62 is screwed in, the connection between the upper housing 1 and the lower housing 2 is realized. When it needs to be opened, simply unscrew the screw 61 out of the nut 62.

[0030] When using a current transformer, if the working environment has ample space, only the first connecting component 5 needs to be opened, allowing the upper housing 1 to rotate around the screw 61 of the second connecting component 6. This creates an opening between the upper housing 1 and the lower housing 2, facilitating the insertion of the conductor to be tested. After the conductor is inserted, the first connecting component 5 can be tightened. If the working environment has limited space, both the first connecting component 5 and the second connecting component 6 must be opened. Then, the upper housing 1 and the lower housing 2 are placed on either side of the conductor to be tested, and finally, the first connecting component 5 and the second connecting component 6 are tightened. This avoids the need for a larger installation space due to the upper housing 1 rotating around the screw 61 of the second connecting component 6.

[0031] After installation, the external measuring device interface is installed on the current transformer terminal 4. When the conductor under test is energized, the current passing through it will form a magnetic field in the closed iron core composed of the upper magnetic core 11 and the winding magnetic core 21. The current is then induced by the coil on the winding magnetic core 21. The two ends of the coil are connected to the terminal 4 respectively. After connecting the external measuring device to the terminal 4, the purpose of measuring or monitoring the current in the conductor under test can be achieved.

[0032] according to Figure 1 , 2 As shown, there is a through hole 56 between the buckle 53 and the barb 55, and a lead seal 7 passes through the through hole 56. In use, after fixing the current transformer, the lead seal 7 is passed through the through hole 56 between the buckle 53 and the barb 55, so that the lead seal 7 must be broken to open the current transformer again, thereby preventing malicious damage, reducing measurement errors, and improving the reliability of the data.

[0033] according to Figure 3 , 5 As shown, a wire fixing device 8 is provided on one side of the lower housing 2. The wire fixing device 8 includes a male buckle 81 and a female buckle 82, which cooperate with each other. The female buckle 82 is provided with a threaded through hole 83, which is horizontal and perpendicular to the direction of wire insertion. An adjusting screw 84 is inserted into the threaded through hole 83, and a top plate 85 is provided at one end of the adjusting screw 84. In use, after the wire is inserted into the current transformer and the upper housing 1 and lower housing 2 are closed, the adjusting screw 84 is rotated to move the top plate 85 closer to the wire until the inner wall of the lower housing 2 clamps the wire with the top plate 85, thereby fixing the current transformer to the wire and preventing measurement deviation due to the movement of the current transformer.

[0034] according to Figure 2As shown, a fastening screw 41 is provided on the outside of the terminal block 4, and a terminal cover 42 is provided on the outside of the terminal block 4. The terminal cover 42 is fastened to the lower housing 2. In use, the terminal cover 42 is opened to expose the fastening screw 41. The fastening screw 41 is loosened with a screwdriver to fix the external wire to the fastening screw 41 and the terminal block 4.

[0035] The upper magnetic core 11 and the winding magnetic core 21 are composed of multiple silicon steel sheets or nanocrystalline materials. This ensures that the current transformer has good measurement accuracy and linearity.

[0036] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A square open-close current transformer, comprising an upper housing (1), an upper magnetic core (11), a lower housing (2), a wound magnetic core (21), and terminals (4), characterized in that, It also includes a first connecting component (5) and a second connecting component (6). The upper housing (1) and the lower housing (2) are movably connected through the first connecting component (5) and the second connecting component (6). The upper magnetic core (11) is located inside the upper housing (1). The winding magnetic core (21) and the lower housing (2) are U-shaped. The winding magnetic core (21) is located inside the lower housing (2). A coil is wound on the winding magnetic core (21). The two ends of the coil are respectively connected to the terminal (4). The terminal (4) passes through the inner wall of the lower housing (2) and is set on the outer surface of the lower housing (2).

2. A square open-close current transformer according to claim 1, characterized in that, The first connecting component (5) is a latch lock component, including a first rotating shaft (51), a second rotating shaft (52), a latch (53), a locking buckle (54), and a barb (55). The locking buckle (54) is connected to the lower housing (2) through the first rotating shaft (51), the latch (53) is connected to the locking buckle (54) through the second rotating shaft (52), and the barb (55) is disposed on one side of the upper housing (1). The latch (53) and the barb (55) cooperate with each other.

3. A square open-close current transformer according to claim 1, characterized in that, The second connecting component (6) is hinged and includes a screw (61) and a nut (62).

4. A square open-close current transformer according to claim 2, characterized in that, There is a through hole (56) between the buckle (53) and the barb (55), and a lead seal (7) passes through the through hole (56).

5. A square open-close current transformer according to claim 1, characterized in that, A wire fixing device (8) is provided on one side of the lower housing (2). The wire fixing device (8) includes a male buckle (81) and a female buckle (82). The male buckle (81) and the female buckle (82) cooperate with each other. A threaded through hole (83) is provided on the female buckle (82). The direction of the threaded through hole (83) is horizontal and perpendicular to the direction of the wire to be tested. An adjusting screw (84) is provided in the threaded through hole (83). A top plate (85) is provided at one end of the adjusting screw (84).

6. A square open-close current transformer according to claim 1, characterized in that, The terminal block (4) is provided with a fastening screw (41), and a terminal cover (42) is provided on the outside of the terminal block (4). The terminal cover (42) is fastened to the lower housing (2).

7. A square open-close current transformer according to claim 1, characterized in that, The cores of the upper magnetic core (11) and the winding magnetic core (21) are composed of multiple silicon steel sheets or nanocrystalline materials.

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