Outdoor secondary cast aluminum junction box single-phase voltage transformer

Abstract

The utility model belongs to the field of voltage transformers, and particularly relates to an outdoor secondary cast aluminum junction box single-phase voltage transformer. A secondary connecting terminal is arranged at the bottom of the side wall of a shell; a cast aluminum junction box is arranged at the bottom of the side wall of the shell; the secondary connection terminal is led out from the cast aluminum junction box, and the cast aluminum junction box is connected with the shell through a cast aluminum junction box fixing bolt. And the shell is formed by vacuum casting of outdoor epoxy resin. A fully-closed and fully-insulated structure is adopted, shielding treatment is carried out inside the structure, and the primary coil, the secondary coil and the iron core are packaged inside the shell. The voltage transformer is simple in structure, easy to install, good in safety, high in secondary protection level, low in material consumption and low in equipment cost, the safety of the voltage transformer is improved, the protection level can reach IP55, and the partial discharge level meets the international requirement.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of voltage transformers, and particularly relates to an outdoor secondary cast aluminum terminal box single-phase voltage transformer. BACKGROUND

[0002] A voltage transformer is similar to a transformer and is used to transform voltage. However, the transformer is used to transform voltage for the purpose of facilitating power transmission, and thus has a large capacity, generally calculated in kilovolt-amperes or megavolt-amperes. The voltage transformer is used to transform voltage for the purpose of supplying power to measuring instruments and relay protection devices, and for measuring the voltage, power and energy of a line.

[0003] The prior art outdoor voltage transformer has low safety, low secondary protection level, complicated installation, high material consumption and increased manufacturing cost. SUMMARY

[0004] The application provides an outdoor secondary cast aluminum terminal box single-phase voltage transformer to solve the problems of low safety, low secondary protection level, complicated installation, high material consumption and increased manufacturing cost of the prior art outdoor voltage transformer.

[0005] The secondary connection terminal is arranged at the bottom of the side wall of the shell, and the cast aluminum terminal box is arranged at the bottom of the side wall of the shell.

[0006] The shell is a fully-closed and fully-insulated structure, and the inside is shielded; the first connecting rod, the second connecting rod, the primary coil, the secondary coil and the iron core are enclosed in the shell.

[0007] The shell is made of outdoor epoxy resin vacuum casting.

[0008] The cast aluminum terminal box and the shell are fixedly connected through the cast aluminum terminal box fixing bolt arranged between the cast aluminum terminal box and the shell.

[0009] The cross section of the iron core is a rectangular ring-shaped rolled silicon steel sheet iron core.

[0010] According to the outdoor secondary cast aluminum terminal box single-phase voltage transformer described above, the primary coil passing through the iron core is welded to one end of the second connecting rod after meeting the number of turns of the primary coil.

[0011] According to the outdoor secondary cast aluminum terminal box single-phase voltage transformer described above, the secondary coil wound on the iron core is welded to the secondary connection terminal after meeting the number of turns of the secondary coil.

[0012] According to the outdoor secondary cast aluminum terminal box single-phase voltage transformer described above, the base is a strip structure with a U-shaped cross section, arranged at the bottom of the shell, and the base is symmetrically provided with threaded holes.

[0013] The beneficial effects of the present application are as follows:

[0014] 1、The secondary connection terminal of the present application is arranged at the bottom of the shell side wall; the shell side wall is provided with a cast aluminum terminal box; the secondary connection terminal is led out from the cast aluminum terminal box, and the cast aluminum terminal box is connected with the shell through the cast aluminum terminal box fixing bolt. The shell is made of outdoor epoxy resin vacuum casting. The structure is simple, easy to install, safe, and has high secondary protection level.

[0015] 2、The present application adopts a fully enclosed and fully insulated structure, and the primary coil, the secondary coil and the iron core are enclosed in the shell. The iron core is made of a rolled silicon steel sheet. The fully insulated structure can withstand power frequency voltage and improve the service life of the voltage transformer. The present application has low material consumption and low equipment cost, improves the safety of the voltage transformer, is easy to install, and has a protection level of IP55 and a local discharge level that meets international requirements. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a front view of an outdoor secondary cast aluminum terminal box single-phase voltage transformer of the present application.

[0017] Figure 2 is a left view of an outdoor secondary cast aluminum terminal box single-phase voltage transformer of the present application.

[0018] Figure 3 is a top view of an outdoor secondary cast aluminum terminal box single-phase voltage transformer of the present application.

[0019] In the figure: 1-first connection terminal, 2-first connecting rod, 3-second connection terminal, 4-second connecting rod, 5-primary coil, 6-iron core, 7-secondary coil, 8-secondary connection terminal, 9-cast aluminum terminal box, 10-cast aluminum terminal box fixing bolt. DETAILED DESCRIPTION

[0020] Preferred Embodiment

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative effort belong to the scope of the present application.

[0022] In the embodiment, the single-phase voltage transformer of the outdoor secondary cast aluminum junction box comprises a shell 10, a first connecting rod 2, a primary coil 5 and a core 6 arranged in the shell 10; one end of the first connecting rod 2 is connected with a first connecting terminal 1; the other end of the first connecting rod 2 is connected with one end of the primary coil 5; the primary coil 5 is arranged through the core 6, and the other end of the primary coil 5 is connected with a second connecting rod 4; the second connecting rod 4 is connected with a second connecting terminal 3; a secondary coil 7 is wound on the core 6; and a secondary connecting terminal 8 is connected with a wire outgoing from the secondary coil 7.

[0023] The secondary connecting terminal 8 is arranged at the bottom of the side wall of a shell 11; the bottom of the side wall of the shell 11 is provided with a cast aluminum junction box 9; the secondary connecting terminal 8 is led out from the cast aluminum junction box 9; and the bottom of the shell 11 is provided with a base 12.

[0024] The shell 11 is a fully-enclosed and fully-insulated structure, and the inside is shielded; the first connecting rod 2, the second connecting rod 4, the primary coil 5, the secondary coil 7 and the core 6 are enclosed in the shell 11.

[0025] The shell 11 is made of outdoor epoxy resin vacuum casting. A cast aluminum junction box fixing bolt 10 is arranged between the cast aluminum junction box 9 and the shell 11 to fixedly connect the two. The core 6 is a rectangular ring-shaped rolled silicon steel sheet core. The primary coil 5 arranged through the core 6 is welded to one end of the second connecting rod 4 after the number of turns of the primary coil 5 passing through the core 6. The wire outgoing from the secondary coil 7 is welded to the secondary connecting terminal 8 after the number of turns of the secondary coil 7 passing through the core 6. The base 12 is a strip structure with a U-shaped cross section, arranged at the bottom of the shell 11, and screw holes are symmetrically arranged on the base 12.

[0026] The first connecting terminal 1 is connected with the first connecting rod 2, and the first connecting rod 2 is connected with the primary coil 5; the core 6 has a rectangular ring shape; the primary coil 5 is arranged through the core 6, and one end of the primary coil 5 is welded to the second connecting rod 4 after the number of turns of the primary coil 5 passing through the core 6; and the second connecting rod 4 is connected with the second connecting terminal 3.

[0027] The secondary coil 7 is wound on the core 6, and the wire outgoing from the secondary coil 7 is welded to the secondary connecting terminal 8 after the number of turns of the secondary coil 7 passing through the core 6. The secondary connecting terminal 8 is led out from the cast aluminum junction box 9 arranged at the bottom of the side wall of the shell 11. The identification of the secondary connecting terminal 8 is determined according to the number of turns of the primary coil 5 and the secondary coil 7.

[0028] The cast aluminum terminal box 9 is connected with the shell through a cast aluminum terminal box fixing bolt 10.

[0029] The secondary connection terminal 8 of the outdoor secondary cast aluminum terminal box single-phase voltage transformer of the present application is led out from the cast aluminum terminal box 9 arranged at the bottom of the side wall of the shell 11, the iron core 6 adopts a rolled silicon steel sheet iron core, the primary coil 5, the secondary coil 7 and the iron core 6 are enclosed inside the shell 11. The whole adopts a fully-closed and fully-insulated structure, the inside is shielded, the partial discharge level meets the international requirements. The protection level can reach IP55. The fully-insulated can withstand power frequency withstand voltage. The service life of the transformer is greatly improved. The present application has low material consumption and low equipment cost, improves the safety of the voltage transformer, is easy to install, and is a safe and reliable voltage transformer easy to install.

[0030] The use range of the embodiment is: suitable for outdoor places. It is commonly used in export projects and State Grid projects.

[0031] The use environment of the embodiment is:

[0032] The load power factor cosφ is 0.8 (lagging) ;

[0033] The ambient temperature is between -40℃ and 50℃;

[0034] The daily average temperature is not higher than 35℃;

[0035] The altitude is not more than 3000m.

[0036] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. An outdoor secondary cast aluminum terminal box single-phase voltage transformer characterized by: The utility model relates to a kind of transformer, including shell (11), first connecting rod (2), primary coil (5) and iron core (6) are provided in shell (11);First connecting rod (2) one end is connected with first connecting terminal (1);The other end of first connecting rod (2) is connected with the one end of primary coil (5);After primary coil (5) is wound through iron core (6), its other end is connected with second connecting rod (4);Second connecting rod (4) is connected with second connecting terminal (3);Iron core (6) is wound with secondary coil (7);Secondary coil (7) is connected with secondary connecting terminal (8) with outgoing line; Secondary connecting terminal (8) is arranged at the bottom of the side wall of shell (11);Aluminum casting terminal box (9) is arranged at the bottom of the side wall of shell (11);Secondary connecting terminal (8) is led out from aluminum casting terminal box (9);Base (12) is arranged at the bottom of shell (11).

2. An outdoor secondary cast aluminum terminal box single-phase voltage transformer according to claim 1, characterized in that: Shell (11) is fully closed and fully insulated structure, and inside has shielding treatment;First connecting rod (2), second connecting rod (4), primary coil (5), secondary coil (7) and iron core (6) are enclosed in shell (11) inside.

3. An outdoor secondary cast aluminum terminal box single-phase voltage transformer according to claim 2, characterized in that: Shell (11) is made of outdoor epoxy resin vacuum casting.

4. An outdoor secondary cast aluminum terminal box single-phase voltage transformer according to claim 3, characterized in that: Aluminum casting terminal box (9) and shell (11) are fixedly connected by aluminum casting terminal box fixing bolt (10) arranged between aluminum casting terminal box (9) and shell (11).

5. An outdoor secondary cast aluminum terminal box single-phase voltage transformer according to claim 4, characterized in that: The cross section of iron core (6) is rectangular ring-shaped rolled silicon steel sheet core.

6. An outdoor secondary cast aluminum terminal box single-phase voltage transformer according to claim 5, characterized in that: After primary coil (5) is wound through iron core (6) and meets the number of turns of primary coil (5), one end of second connecting rod (4) is welded.

7. An outdoor secondary cast aluminum terminal box single-phase voltage transformer according to claim 6, characterized in that: After secondary coil (7) is wound on iron core (6) and meets the number of turns of secondary coil (7), outgoing line of secondary coil (7) is welded with secondary connecting terminal (8).

8. An outdoor secondary cast aluminum terminal box single-phase voltage transformer according to claim 7, characterized in that: Base (12) is two strip structures with U-shaped cross section, arranged at the bottom of shell (11), and screw holes are symmetrically arranged on base (12).

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