A tap lead arrangement for a load regulation transformer

Abstract

The utility model relates to a kind of tap lead arrangement structure of on-load voltage regulating transformer, including transformer, oil tank, on-load tap changer, A phase connecting line, B phase connecting line and C phase connecting line, on-load tap changer is arranged in the long axis direction of transformer and close to A phase winding outside, on-load tap changer separately provides A phase, B phase and C phase tap contact, A phase connecting line is connected to A phase tap contact after being led out from A phase high-voltage winding tap;B phase connecting line is led to transformer body lower clamp again along horizontal direction through lead clamp to on-load tap changer lower part, again vertically upwardly connected to B phase tap contact after being led out from B phase high-voltage winding tap vertically downwardly;C phase connecting line is led to transformer body lower clamp again along horizontal direction through lead clamp to on-load tap changer lower part, again vertically upwardly connected to C phase tap contact after being led out from C phase high-voltage winding tap vertically downwardly.The utility model can reduce the distance between winding and tank wall, solve the problem of large volume and heavy weight of transformer.

Description

Technical Field

[0001] This utility model relates to the field of transformer wiring technology, specifically to a tap changer arrangement structure for an on-load tap changer. Background Technology

[0002] The tap changer structure is a crucial technical issue in the design of on-load tap-changing transformers. Typically, the tap changer layout follows the transformer wiring diagram, starting from the high-voltage winding and extending laterally along the space between the winding and the tank wall to the on-load tap changer. This layout requires increasing the distance between the winding and the tank wall to ensure the insulation distance meets regulations, thus increasing the width of the transformer tank, increasing the transformer's weight, and requiring a larger number and length of clamps to hold the leads, further increasing production costs. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a tap changer arrangement structure for an on-load tap changer, which reduces the width between the winding and the tank, thereby reducing the weight of the transformer. Furthermore, it requires fewer and shorter wire clamps to hold the leads, thus lowering production costs.

[0004] This utility model is achieved through the following technical solution: A tap changer arrangement structure for an on-load tap changer is provided, comprising a transformer, a tank, an on-load tap changer, an A-connection connection, a B-connection connection, and a C-connection connection. The on-load tap changer is arranged along the long axis of the transformer and close to the outer side of the A-phase winding. The on-load tap changer has separate contacts for phases A, B, and C, wherein: The A-connection wiring is led out from the A-phase high-voltage winding group connector and directly connected to the A-phase tap contact of the on-load tap changer; The B-connection wiring is led vertically downward from the B-phase high-voltage winding group connector to the lower clamp of the transformer body, then horizontally through the conductor clamp to the lower part of the on-load tap changer, and then vertically upward to the B-phase contact of the on-load tap changer. The C-connection wiring is led vertically downward from the C-phase high-voltage winding group connector to the lower clamp of the transformer body, then horizontally through the conductor clamp to the lower part of the on-load tap changer, and then vertically upward to the C-phase contact of the on-load tap changer. Furthermore, the A connection is arranged on the low-voltage side of the transformer body, while the B and C connections are arranged on the high-voltage side of the transformer body.

[0005] By making full use of the space between the transformer body and the oil tank, and avoiding the lead wires passing through the position between the winding and the oil tank, the width dimension between the winding and the oil tank is reduced.

[0006] Furthermore, the wiring connected to B and the wiring connected to C are arranged in parallel.

[0007] The B-connection wire and the C-connection wire are arranged side by side in parallel. The wire clamps are short in length and few in number, which facilitates the clamping, assembly and fixation of the lead wires.

[0008] Furthermore, in the horizontal direction, the connection wires connected by B and C are in the same horizontal plane.

[0009] The B-connection and C-connection are on the same horizontal plane, which makes full use of the space and helps to reduce the space required for the fuel tank.

[0010] The beneficial effects of this utility model are: The lead arrangement structure of this utility model reduces the width between the winding and the oil tank, thereby reducing the weight of the transformer. It also requires fewer and shorter wire clamps to hold the leads, thus reducing costs.

[0011] The lead arrangement structure is reasonable, easy to assemble, safe and reliable. It overcomes the shortcomings of the lead structure in the background technology, saves steel, transformer oil, wire clamp materials, etc., can reduce transformer stray losses, and effectively ensure the reliable operation of on-load tap-changing transformers. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0013] Figure 2 This is a top view of the present invention.

[0014] Figure 3 This is a side cross-sectional view of the present invention.

[0015] As shown in the figure: 1. On-load tap changer; 2. Oil tank; 3. Wire clamp; 4. Lower clamp of transformer body; 5. B connection wire; 6. C connection wire; 7. A connection wire; 8. A-phase high-voltage winding; 9. B-phase high-voltage winding; 10. C-phase high-voltage winding. Detailed Implementation

[0016] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0017] like Figures 1-3 As shown, an on-load tap changer transformer tap lead arrangement structure includes a transformer, an oil tank 2, an on-load tap changer 1, an A-connection wire 7, a B-connection wire 5, and a C-connection wire 6. The on-load tap changer 1 is arranged in the long axis direction of the transformer and close to the outside of the A-phase winding 9. The on-load tap changer 1 is provided with A-phase, B-phase, and C-phase contact heads.

[0018] Connection 7 is led out from the tap of the A-phase high-voltage winding 8 and directly connected to the A-phase tap contact of the on-load tap changer 1.

[0019] The B-connection wire 5 is led vertically downward from the tap of the B-phase high-voltage winding 9 to the lower clamp of the transformer body, then horizontally through the wire clamp 3 to the lower part of the on-load tap changer 1, and then vertically upward to the B-phase contact of the on-load tap changer 1.

[0020] The C-connection wire 6 is led vertically downward from the C-phase high-voltage winding 10 tap to the lower clamp 4 of the transformer body, then horizontally through the wire clamp 3 to the lower part of the on-load tap changer 1, and then vertically upward to the C-phase contact of the on-load tap changer 1. Connection A (connection 7) is located on the low-voltage side of the transformer body, while connection B (connection 5) and connection C (connection 6) are located on the high-voltage side of the transformer body.

[0021] Connection 5 (B) and connection 6 (C) are arranged side by side in parallel. In the horizontal direction, connection 5 (B) and connection 6 (C) are in the same horizontal plane.

[0022] The lead arrangement structure of this utility model reduces the width between the winding and the oil tank, thereby reducing the weight of the transformer. It also requires fewer and shorter wire clamps to hold the leads. This lead arrangement structure is reasonable, easy to assemble, and safe and reliable, overcoming the shortcomings of existing lead structures. It saves steel, transformer oil, and wire clamp materials, reduces stray losses in the transformer, and effectively ensures the reliable operation of on-load tap-changing transformers.

[0023] Of course, the above description is not limited to the examples above. Technical features of this utility model not described can be implemented by or using existing technology, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solution of this utility model and are not intended to limit this utility model. This utility model has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this utility model do not depart from the spirit of this utility model and should also fall within the protection scope of the claims of this utility model.

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