10kV voltage transformer of explosion-proof cabinet

Abstract

The utility model discloses a 10kV voltage transformer of an explosion-proof cabinet, which comprises an epoxy resin shell, a hollow annular iron core is arranged in the epoxy resin shell, a primary coil is wound on the annular iron core, one end of the primary coil is connected with one end of a connecting soft high-voltage wire A, and the other end of the connecting soft high-voltage wire B is connected with the epoxy resin shell. The other end of the connecting soft high-voltage wire A is connected with the primary wiring terminal A. The other end of the primary coil is connected with one end of the connecting soft high-voltage wire B. The other end of the connecting soft high-voltage wire B is connected with the primary wiring terminal B. A secondary coil is further wound on the annular iron core, one end of the secondary coil is connected with the secondary wiring terminal A, and the other end of the secondary coil is connected with the secondary wiring terminal B. The dry-type voltage transformer has no leakage problem, is small in size, light in weight, simple in structure and convenient to install and maintain, and is suitable for middle and high voltage circuits.

Description

Technical Field

[0001] The invention relates to the field of electric power measuring equipment, and in particular to an explosion-proof cabinet 10kV voltage transformer. Background Art

[0002] The basic structure of a voltage transformer is very similar to that of a transformer. It also has two windings, one called the primary winding and the other called the secondary winding. Both windings are mounted on or wound around the iron core. There is insulation between the two windings and between the windings and the iron core, so that there is electrical isolation between the two windings and between the windings and the iron core. When the voltage transformer is in operation, the primary winding N1 is connected in parallel to the line, and the secondary winding N2 is connected in parallel to the instrument or relay. The design of the 10kV voltage transformer currently used in explosion-proof cabinets has problems such as large size and complex structure. Summary of the invention

[0003] In view of the above problems, the present invention provides a dry-type voltage transformer which has small size, light weight, simple structure and is easy to install and maintain.

[0004] In order to achieve the above-mentioned object, the present invention provides an explosion-proof cabinet 10kV voltage transformer, which comprises: an epoxy resin shell, a hollow annular iron core is installed in the epoxy resin shell, a primary coil is wound on the annular iron core, one end of the primary coil is connected to one end of a soft high-voltage line A, the other end of the soft high-voltage line A is connected to a primary wiring terminal A, the other end of the primary coil is connected to one end of a soft high-voltage line B, and the other end of the soft high-voltage line B is connected to a primary wiring terminal B;

[0005] A secondary coil is also wound around the annular iron core, one end of the secondary coil is connected to the secondary wiring terminal A, and the other end of the secondary coil is connected to the secondary wiring terminal B.

[0006] Preferably, a hollow connecting tube A is installed in the epoxy resin shell along the horizontal direction, the connecting soft high-voltage wire A is placed in the connecting tube A, and the primary terminal A is installed at the end of the arc-shaped part of the connecting tube A outside the epoxy resin shell.

[0007] Preferably, a hollow connecting tube B is installed in the epoxy resin shell along the horizontal direction, the connecting soft high-voltage wire B is placed in the connecting tube B, and the primary terminal B is installed at the end of the arc-shaped part of the connecting tube B outside the epoxy resin shell.

[0008] The beneficial effects of the present invention are as follows: the present invention has no leakage problem, is small in size, light in weight, has a simple structure, is easy to install and maintain, and is a dry-type voltage transformer suitable for medium and high voltage circuits. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the structure of the present invention.

[0010] In the figure: 1. Primary terminal A; 2. Connection of soft high-voltage wire A; 3. Primary coil; 4. Connection of soft high-voltage wire B; 5. Primary terminal B; 6. Secondary coil; 7. Iron core; 8. Secondary terminal A; 9. Secondary terminal B. DETAILED DESCRIPTION Specific embodiment:

[0012] like Figure 1 As shown, the present invention provides a miniaturized 10kV voltage transformer with excellent insulation performance and high precision. The explosion-proof cabinet miniaturized 10kV voltage transformer comprises: a primary terminal A1; a connection soft high-voltage wire A2; a primary coil 3; a connection soft high-voltage wire B4; a primary terminal B5; a secondary coil 6; an iron core 7; a secondary terminal A8; and a secondary terminal B9; the primary terminal A1 of the explosion-proof cabinet miniaturized 10kV voltage transformer is connected to the primary coil 3 by connecting the soft high-voltage wire A2, the primary coil 3 passes through the iron core 7, determines the number of through-core turns, and is welded at the other end to connect the soft high-voltage wire B4, and the connection soft high-voltage wire B4 is connected to the primary terminal B5. The secondary coil 6 is evenly wound on the iron core 7, the secondary coil 6 is connected to the secondary terminal, and the transformer is cast with epoxy resin material; the present invention does not have leakage problems, has a small size, light weight, simple structure, is easy to install and maintain, and is a dry-type voltage transformer suitable for medium and high voltage circuits.

[0013] The iron core adopts a rolled silicon steel sheet iron core, adopts a fully enclosed structure, and can be shielded inside. The partial discharge level meets international requirements; the fully enclosed structure, the iron core and the coil are enclosed inside, which can effectively increase the service life of the transformer. In addition, the present invention has low consumables and low equipment cost, improves the safety of the voltage transformer and the ease of installation, and is a safe, reliable and easy-to-install voltage transformer.

[0014] The application scope of the present invention is suitable for 10kV explosion-proof cabinets.

[0015] The use environment of the present invention is as follows: load power factor cosφ=0.8 (lagging); ambient temperature is between -30°C and 40°C; daily average temperature is not higher than 30°C; altitude does not exceed 1000m.

[0016] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A 10kV voltage transformer for explosion-proof cabinet, characterized in that: It includes: epoxy resin A housing, wherein a hollow annular core is installed in the epoxy resin housing, a primary coil is wound on the annular core, one end of the primary coil is connected to one end of a soft high-voltage wire A, the other end of the soft high-voltage wire A is connected to a primary wiring terminal A, the other end of the primary coil is connected to one end of a soft high-voltage wire B, and the other end of the soft high-voltage wire B is connected to a primary wiring terminal B; A secondary coil is also wound around the annular iron core, one end of the secondary coil is connected to the secondary wiring terminal A, and the other end of the secondary coil is connected to the secondary wiring terminal B.

2. The explosion-proof cabinet 10kV voltage transformer according to claim 1, characterized in that: A hollow connecting tube A is also installed in the epoxy resin shell along the horizontal direction, and the connecting soft high-voltage wire A is placed in the connecting tube A. The primary terminal A is installed at the end of the arc-shaped part of the connecting tube A outside the epoxy resin shell.

3. The explosion-proof cabinet 10kV voltage transformer according to claim 1, characterized in that: A hollow connecting tube B is also installed in the epoxy resin shell along the horizontal direction, and the connecting soft high-voltage wire B is placed in the connecting tube B. The primary terminal B is installed at the end of the arc-shaped part of the connecting tube B outside the epoxy resin shell.

Images