CN219435685U

CN219435685U - Full-insulation structure voltage transformer for 35kV gas-filled cabinet

Info

Publication number: CN219435685U
Application number: CN202320756131.7U
Authority: CN
Inventors: 姚海明; 胥卫; 徐一峰
Original assignee: Jiangsu Cosine Electric Co ltd
Current assignee: Jiangsu Cosine Electric Co ltd
Priority date: 2023-04-07
Filing date: 2023-04-07
Publication date: 2023-07-28
Anticipated expiration: 2033-04-07

Abstract

The utility model relates to a full-insulation structure voltage transformer for a 35kV gas-filled cabinet, which comprises an iron core, a primary winding and a secondary winding, wherein the iron core, the primary winding and the secondary winding are cast in a metal shell through epoxy resin, the secondary winding and the primary winding are wound outside the iron core, two high-voltage primary electrodes are symmetrically arranged left and right along the axial direction of the primary winding, the high-voltage primary electrodes penetrate through the metal shell from top to bottom through an annular shielding electrode and extend into the metal shell, the annular shielding electrode is connected with the metal shell, a sleeve is sleeved on the high-voltage primary electrodes outside the metal shell, the lower ends of the left and right high-voltage primary electrodes are respectively connected with left and right leads of the primary winding, and the lower part of the secondary winding is connected with a secondary flexible cable. The structure is simple, the two pairs are adopted to meet the power frequency voltage withstand requirement of the high-voltage end double 95kV, the whole built-in structure is reasonable, the electric field design is uniform, the size is small, and the technical requirement of installing the small space of the air charging cabinet is conveniently met.

Description

Full-insulation structure voltage transformer for 35kV gas-filled cabinet

Technical Field

The utility model relates to a voltage transformer, in particular to a full-insulation structure voltage transformer for a 35kV gas-filled cabinet.

Background

The 35kV mutual inductor matched with the inflatable cabinet in the market at present adopts a semi-insulating structure, namely, the high-voltage end meets the requirement of 95kV power frequency withstand voltage, and the other end meets the requirement of 5kV power frequency withstand voltage. The existing transformer mostly needs to adopt three terminals to be connected out, and when the existing transformer is used as a group for pairing, the existing transformer occupies large space on the installation space of the cabinet body, and the engineering cost and the high cost are high.

Disclosure of Invention

The utility model provides a full-insulation structure voltage transformer for a 35kV gas-filled cabinet, which has a simple structure and meets the requirement of high-voltage end double 95kV power frequency withstand voltage by adopting two pairs.

The technical scheme adopted by the utility model is as follows: the utility model provides a 35kV fills gas holder with full insulation structure voltage transformer, includes iron core, primary winding and the secondary winding of pouring in metal casing through epoxy, and the iron core is around having secondary winding and primary winding, its characterized in that: the high-voltage primary electrodes are symmetrically arranged left and right along the axial direction of the primary winding, the high-voltage primary electrodes extend into the metal shell from top to bottom through the annular shielding electrode, the annular shielding electrode is connected with the metal shell, the high-voltage primary electrodes outside the metal shell are sleeved with sleeves, the lower ends of the left and right high-voltage primary electrodes are respectively connected with left and right leads of the primary winding, and the lower part of the secondary winding is connected with a secondary flexible cable.

The sleeve is a C-shaped sleeve.

The metal shell is an aluminum alloy metal shell.

The annular shielding electrode is covered in the metal shell through an European standard C-shaped sleeve.

The core bottom is provided with a core support plate 13.

And the lower part of the metal shell is externally connected with a hanging ring insert.

The lower part of the metal shell is connected with the bottom plate or the lower part of the metal shell is externally connected with the lower mounting insert.

The primary winding component is divided into a left section and a right section, the left section and the right section are connected through a middle lead, and insulating resin is poured between the left section and the right section.

The primary winding is arranged outside the secondary winding, and insulating resin is poured between the primary winding and the secondary winding.

The voltage transformer is characterized in that two high-voltage primary electrodes are connected to a metal shell, the two high-voltage primary electrodes are connected to the metal shell in a penetrating way through an annular shielding electrode, and the annular shielding electrode shields the electric field of the high-voltage primary electrodes. The two high-voltage primary electrodes are respectively connected to the left and right leads of the primary winding, so that the two high-voltage primary electrodes can be connected with the voltage between the measurable phase and the phase, the voltage between the phase and the first phase can be measured, and the requirement of high-voltage end double 95kV power frequency withstand voltage is met. The aluminum alloy metal shell is internally provided with the primary winding coil and the secondary winding coil, epoxy resin is filled between the winding coils as insulation, the top of the winding coils is provided with two primary C-shaped sleeves, the whole internal structure is reasonable, the electric field design is uniform, the size is small, and the technical requirement of small space installation of the air charging cabinet can be met conveniently.

Drawings

FIG. 1 is a schematic view of the internal structure of the present utility model;

fig. 2 is a left side view of fig. 1.

In the figure: the high-voltage primary electrode 1, a C-shaped sleeve 2, an annular shielding electrode 3, a primary winding 4, epoxy resin 5, a secondary winding 6, an iron core 7, a hanging ring insert 8, a mounting insert 9, an aluminum alloy shell 10, a primary connecting lead 11, a hanging ring 12, an iron core supporting plate 13, a secondary flexible cable 14 and a bottom plate 15.

Detailed Description

Further description is provided below with reference to the accompanying drawings.

Fig. 1 and 2 show: the utility model provides a 35kV is full insulation structure voltage transformer for gas holder, pour iron core 7 through epoxy in aluminum alloy shell 10, primary winding 4 and secondary winding 6, two high-voltage primary electrode 1 set up along primary winding axial direction bilateral symmetry, and stretch into inside through annular shielding electrode 3 from top to bottom cross-under aluminum alloy shell 10, annular shielding electrode 3 connects the aluminum alloy shell, cup joint the C sleeve pipe 2 of cover annular shielding electrode 3 on the high-voltage primary electrode outside the metal casing, two left and right sides primary connection lead 11 of primary winding 4 are connected respectively to two high-voltage primary electrode 1 lower extreme, secondary flexible cable 14 is connect out to secondary winding 6 lower part. The lower part of the aluminum alloy shell 10 is externally connected with a hanging ring insert 8 with a hanging ring 12.

In fig. 2, the bottom of the aluminum alloy shell 10 is a bottom plate 15, an iron core supporting plate 13 for supporting an iron core is arranged on the bottom plate 15, and the lower part of the aluminum alloy shell is externally connected with a lower mounting insert 9 for lower positioning, mounting, supporting and embedding.

Claims

1. The utility model provides a 35kV fills gas holder with full insulation structure voltage transformer, includes iron core, primary winding and the secondary winding of pouring in metal casing through epoxy, and the iron core is around having secondary winding and primary winding, its characterized in that: the high-voltage primary electrodes are symmetrically arranged left and right along the axial direction of the primary winding, the high-voltage primary electrodes extend into the metal shell from top to bottom through the annular shielding electrode, the annular shielding electrode is connected with the metal shell, the high-voltage primary electrodes outside the metal shell are sleeved with sleeves, the lower ends of the left and right high-voltage primary electrodes are respectively connected with left and right leads of the primary winding, and the lower part of the secondary winding is connected with a secondary flexible cable.

2. The full-insulation structure voltage transformer for 35kV gas-filled cabinet according to claim 1, wherein the full-insulation structure voltage transformer comprises the following components: the sleeve is a C-shaped sleeve.

3. The full-insulation structure voltage transformer for 35kV gas-filled cabinet according to claim 1, wherein the full-insulation structure voltage transformer comprises the following components: the metal shell is an aluminum alloy metal shell.

4. The full-insulation structure voltage transformer for 35kV gas-filled cabinet according to claim 2, wherein the full-insulation structure voltage transformer is characterized in that: the annular shielding electrode is covered in the metal shell through an European standard C-shaped sleeve.

5. The full-insulation structure voltage transformer for 35kV gas-filled cabinet according to claim 1, wherein the full-insulation structure voltage transformer comprises the following components: the iron core bottom sets up the iron core backup pad.

6. The full-insulation structure voltage transformer for 35kV gas-filled cabinet according to claim 1, wherein the full-insulation structure voltage transformer comprises the following components: and the lower part of the metal shell is externally connected with a hanging ring insert.

7. The full-insulation structure voltage transformer for 35kV gas-filled cabinet according to claim 1, wherein the full-insulation structure voltage transformer comprises the following components: the lower part of the metal shell is connected with the bottom plate or the lower part of the metal shell is externally connected with the lower mounting insert.

8. The full-insulation structure voltage transformer for 35kV gas-filled cabinet according to claim 1, wherein the full-insulation structure voltage transformer comprises the following components: the primary winding component is divided into a left section and a right section, the left section and the right section are connected through a middle lead, and insulating resin is poured between the left section and the right section.

9. The full-insulation structure voltage transformer for 35kV gas-filled cabinet of claim 8, wherein the full-insulation structure voltage transformer comprises the following components: the primary winding is arranged outside the secondary winding, and insulating resin is poured between the primary winding and the secondary winding.