Installation structure of current transformer for box transformer substation

Abstract

The utility model discloses a mounting structure of a current transformer for a box transformer substation, which comprises an oil-immersed transformer and a high-voltage bushing, the high-voltage bushing is fixed on an oil tank of the oil-immersed transformer, one end of the high-voltage bushing is inserted into the oil tank of the oil-immersed transformer, the current transformer is fixed in the oil tank, the current transformer is electrically connected with the high-voltage bushing, and the high-voltage bushing is fixed on the oil tank of the oil-immersed transformer. According to the structure, the manufacturing cost is reduced, and the size of the whole oil-immersed transformer is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of prefabricated substations, in particular to an installation structure of a current transformer for a box-type substation. Background Art

[0002] A box-type substation, also known as a prefabricated substation, is composed of a high-voltage chamber, a transformer, and a low-voltage chamber integrated together. A bushing is an insulating device that can introduce a live conductor into an electrical equipment. The electrical connection between the high-voltage chamber and the oil-immersed transformer is realized through the bushing. The end of the bushing is connected to a high-voltage current transformer, and the current transformer is arranged inside the transformer. Generally, a separate space needs to be set inside the transformer to accommodate the end of the bushing and the current transformer at the end of the bushing. Such a setting not only increases the manufacturing cost but also increases the volume of the transformer. Summary of the Utility Model

[0003] Aiming at the defects existing in the above-mentioned prior art, the purpose of the utility model is to provide an installation structure of a current transformer for a box-type substation to solve the problem of the installation position of the current transformer.

[0004] The purpose of the utility model is realized by adopting the following technical solutions:

[0005] An installation structure of a current transformer for a box-type substation includes an oil-immersed transformer and a high-voltage bushing. The high-voltage bushing is fixed on the oil tank of the oil-immersed transformer. One end of the high-voltage bushing is inserted into the oil tank of the oil-immersed transformer. A current transformer is fixed inside the oil tank, and the current transformer is electrically connected to the high-voltage bushing.

[0006] Further, a conductive rod is fixed in the center of the high-voltage bushing. The high-voltage bushing includes insulating fins and a fixed flange. The insulating fins are arranged on the outer periphery of the conductive rod, and the fixed flange is used to fix the high-voltage bushing on the box body of the oil tank.

[0007] Further, the side wall of the oil tank where the high-voltage bushing is located protrudes from the oil-immersed transformer, and the protruding side wall extends into the high-voltage chamber of the box-type substation.

[0008] Further, the top view section of the side wall is trapezoidal, and the side wall extends into and is fixed in the high-voltage chamber of the box-type substation.

[0009] Further, a high-voltage winding is fixed inside the oil tank. A high-voltage lead is connected between the high-voltage winding and the high-voltage bushing. The high-voltage lead passes through the current transformer, or one end of the high-voltage bushing is directly connected to the current transformer.

[0010] The beneficial effects of the utility model are:

[0011] The current transformer of the present utility model directly extends into the oil tank of the oil-immersed transformer, and the oil-immersed transformer does not need to additionally set up a space for accommodating the current transformer, which not only reduces the manufacturing cost, but also reduces the volume of the oil-immersed transformer. Description of the Drawings

[0012] Figure 1 is the front view of the installation structure of the current transformer for the box-type substation of the present utility model;

[0013] Figure 2 is the schematic structural diagram of the high-voltage bushing in the present utility model;

[0014] Figure 3 is the top view of the installation structure of the current transformer for the box-type substation of the present utility model;

[0015] Figure 4 is the installation relationship diagram of the high-voltage bushing and the current transformer in the present utility model.

[0016] In the figure: 1. Oil-immersed transformer; 2. High-voltage bushing; 3. Oil tank; 4. Current transformer; 5. Conductive rod; 6. Insulating fin; 7. Fixed flange; 8. Side wall; 9. High-voltage chamber; 10. High-voltage winding; 11. High-voltage lead. Detailed Embodiment

[0017] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model clearer and more understandable, the following further describes the utility model in conjunction with the drawings and embodiments.

[0018] As Figures 1 to 4 shown, the present utility model provides an installation structure of a current transformer for a box-type substation, including an oil-immersed transformer 1 and a high-voltage bushing 2. The high-voltage bushing 2 is fixed on the oil tank 3 of the oil-immersed transformer 1. One end of the high-voltage bushing 2 is inserted into the oil tank 3 of the oil-immersed transformer 1. A current transformer 4 is fixed in the oil tank 3, and the current transformer 4 is electrically connected to the high-voltage bushing 2.

[0019] The high-voltage bushing 2 is used to realize the electrical connection between the oil-immersed transformer 1 and the high-voltage chamber 9 in the box-type substation, and the current transformer 4 is used to provide the transmission current information between the oil-immersed transformer 1 and the high-voltage chamber 9.

[0020] Currently, the existing current transformer 4 is arranged in the transformer, and a special space for accommodating the current transformer 4 is arranged in the transformer. The existence of this accommodating space increases the volume of the transformer. Compared with the prior art, this current transformer 4 is directly fixed in the oil tank 3 of the oil-immersed transformer 1, and the oil-immersed transformer 1 does not need to additionally set up a space for accommodating the current transformer 4, which reduces the manufacturing cost, and most importantly, reduces the volume of the entire oil-immersed transformer 1.

[0021] Furthermore, a conductive rod 5 is fixedly installed at the center of the high-voltage bushing 2. The high-voltage bushing 2 includes insulating fins 6 and a fixed flange 7. The insulating fins 6 are arranged on the outer periphery of the conductive rod 5, and the fixed flange 7 is used to fix the high-voltage bushing 2 on the casing of the fuel tank 3.

[0022] Furthermore, the side wall 8 of the fuel tank 3 where the high-voltage bushing 2 is located protrudes from the oil-immersed transformer 1. The protruding side wall 8 extends into the high-voltage chamber 9 of the box-type substation. The high-voltage chamber 9 and the fuel tank 3 are fixedly connected. The protruding side wall 8 of the oil-immersed transformer 1 extends into the high-voltage chamber 9 of the box-type substation, further reducing the combined volume of the high-voltage chamber 9 and the oil-immersed transformer 1.

[0023] Furthermore, the top view section of the side wall 8 is trapezoidal, and the side wall 8 extends into and is fixed in the high-voltage chamber 9 of the box-type substation.

[0024] Furthermore, a high-voltage winding 10 is fixedly installed in the fuel tank 3. A high-voltage lead 11 is connected between the high-voltage winding 10 and the high-voltage bushing 2. The high-voltage lead 11 passes through the current transformer 4, or one end of the high-voltage bushing 2 directly passes through and is connected to the current transformer 4.

[0025] The current transformer 4 of the present utility model is directly fixed in the fuel tank 3 of the oil-immersed transformer 1. The oil-immersed transformer 1 does not need to additionally provide a space for accommodating the current transformer 4, which not only reduces the manufacturing cost but also reduces the volume of the oil-immersed transformer 1.

[0026] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. An installation structure for a current transformer for a box-type transformer, characterized in that: The invention comprises an oil-immersed transformer (1) and a high-voltage bushing (2), wherein the high-voltage bushing (2) is fixed on an oil tank (3) of the oil-immersed transformer (1), one end of the high-voltage bushing (2) is inserted into the oil tank (3) of the oil-immersed transformer (1), a current transformer (4) is fixed in the oil tank (3), and the current transformer (4) is electrically connected to the high-voltage bushing (2).

2. The installation structure of a current transformer for a box-type transformer according to claim 1 is characterized in that: The side wall (8) of the oil tank (3) where the high-voltage bushing (2) is located protrudes from the oil-immersed transformer (1), and the protruding side wall (8) extends into the high-voltage chamber (9) of the box transformer.

3. The installation structure of a current transformer for a box-type transformer according to claim 2 is characterized in that: The side wall (8) has a trapezoidal cross-section when viewed from above, and the side wall (8) extends into and is fixed to the high-pressure chamber (9) of the box transformer.

4. The installation structure of a current transformer for a box-type transformer according to claim 1 is characterized in that: A high-voltage winding (10) is fixed in the oil tank (3); a high-voltage lead (11) is connected between the high-voltage winding (10) and the high-voltage bushing (2); the high-voltage lead (11) passes through the current transformer (4), or one end of the high-voltage bushing (2) is directly connected to the current transformer (4).

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