CN210535493U

CN210535493U - Built-in current transformer structure

Info

Publication number: CN210535493U
Application number: CN201921915617.0U
Authority: CN
Inventors: 陈军明; 刘涛; 王亚静; 王友双; 曹会川; 安宁
Original assignee: BAODING BAOLING TRANSFORMER CO LTD
Current assignee: BAODING BAOLING TRANSFORMER CO LTD
Priority date: 2019-11-08
Filing date: 2019-11-08
Publication date: 2020-05-15
Anticipated expiration: 2029-11-08

Abstract

The utility model relates to a built-in current transformer structure belongs to transformer technical field. The technical scheme is as follows: the current transformer (11) is placed in the supporting cylinder (7), the end insulator (9) is tightly pressed at the end part of the current transformer (11), the paper rings (8) are arranged at the bottom of the supporting cylinder (7) and are filled in the gap between the supporting cylinder (7) and the current transformer, and three supporting plates (10) are inserted between the current transformer and the supporting cylinder (7); the support cylinder, the paper ring, the end insulator, the support plate and the current transformer form an inverted current transformer (5), a fixed seat (6) is arranged on the inner side of the oil tank cover (2), and the inverted current transformer is inversely fixed on the fixed seat through a blackening bolt, a blackening nut and a gasket. The utility model discloses cancelled the oil tank case lid on with the intervascular seat that rises, with current transformer flip-chip mounting inside the transformer, simple structure, simple to operate can reduce the whole height of transformer effectively.

Description

Built-in current transformer structure

Technical Field

The utility model relates to a built-in current transformer structure belongs to transformer technical field.

Background

The current transformer consists of a closed iron core and a winding, the number of turns of a primary winding of the current transformer is small, the current transformer is connected in series in a current circuit to be measured, the number of turns of a secondary winding is large, and the current transformer is connected in series in a measuring instrument and a protection circuit. The current transformer is a sensor for acquiring current information of an electric primary loop by secondary equipment such as a measuring instrument and relay protection in an electric power system, and mainly has the functions of converting large current in an alternating current circuit into small current with a certain proportion, wherein the primary side of the current is connected with a primary system, and the secondary side of the current is connected with the measuring instrument and the relay protection.

The current transformers are divided into dry type current transformers, pouring type current transformers, oil immersed type current transformers and gas insulated current transformers according to insulating media; the current transformers are divided into a penetration type current transformer, a pillar type current transformer, a sleeve type current transformer and a bus type current transformer according to the installation mode. In a large oil-immersed power transformer, oil immersion is mainly adopted for insulation, and a sleeve type current transformer is mainly adopted for installation. At present, in a conventional power transformer, a lifting seat is mainly installed between a tank cover and a bushing to place a current transformer.

Due to the limitation of the installation site of the transformer, the user requires to limit the overall height of the transformer, and the conventional installation mode of the bushing type current transformer causes the overall height of the transformer to be ultrahigh, so that the requirement cannot be met. In order to meet the requirement of the overall height of the transformer, how to place the current transformer becomes a subject of design research.

Disclosure of Invention

The utility model aims at providing a built-in current transformer structure, cancelled the oil tank case lid on with the intertube rise seat, with current transformer flip-chip inside the transformer, simple structure, simple to operate can reduce the whole height of transformer effectively, has solved the above-mentioned problem that exists among the background art effectively.

The technical scheme of the utility model is that: a built-in current transformer structure comprises a supporting cylinder, paper rings, end insulators, supporting plates and current transformers, wherein the current transformers are placed in the supporting cylinder, the end insulators are tightly pressed at the end parts of the current transformers, the paper rings are arranged at the bottom of the supporting cylinder and are fully filled in gaps between the supporting cylinder and the current transformers, and the number of the supporting plates is three, and the supporting plates are inserted between the current transformers and the supporting cylinder; the support cylinder, the paper ring, the end insulator, the support plate and the current transformer form an inverted current transformer, a fixed seat is arranged on the inner side of the oil tank cover, and the inverted current transformer is inversely fixed on the fixed seat through a blackening bolt, a blackening nut and a gasket.

The oil tank cover is characterized by further comprising a sleeve, an oil tank and a wiring terminal box, wherein the sleeve is installed on the upper portion of the oil tank cover, a cable of the sleeve penetrates through the inverted current transformer, the wiring terminal box is installed on the oil tank, and an outlet wire of the inverted current transformer is connected to the wiring terminal box.

The blackening bolt and the blackening nut refer to black bolts and black nuts and are sold in the market.

The utility model has the advantages that: the lifting seat between the oil tank cover and the sleeve is eliminated, the current transformer is inversely installed inside the transformer, the structure is simple, the installation is convenient, and the integral height of the transformer can be effectively reduced.

Drawings

FIG. 1 is a front view of the present invention;

fig. 2 is a top view of the installation of the present invention;

fig. 3 is a schematic structural diagram of the present invention;

in the figure: the device comprises a sleeve 1, an oil tank cover 2, an oil tank 3, a wiring terminal box 4, an inverted current transformer 5, a fixed seat 6, a supporting cylinder 7, a paper ring 8, an end insulator 9, a supporting plate 10 and a current transformer 11.

Detailed Description

The technical solution of the present invention will be further described in detail with reference to the accompanying drawings and embodiments.

A built-in current transformer structure comprises a supporting cylinder 7, paper rings 8, end insulators 9, supporting plates 10 and current transformers 11, wherein the current transformers 11 are placed inside the supporting cylinder 7, the end insulators 9 are tightly pressed at the end parts of the current transformers 11, the paper rings 8 are arranged at the bottom of the supporting cylinder 7 and are filled in gaps between the supporting cylinder 7 and the current transformers 11, and the number of the supporting plates 10 is three, and the supporting plates are inserted between the current transformers 11 and the supporting cylinder 7; the support cylinder 7, the paper ring 8, the end insulator 9, the support plate 10 and the current transformer 11 form an inverted current transformer 5, a fixing seat 6 is arranged on the inner side of the oil tank cover 2, and the inverted current transformer 5 is inversely fixed on the fixing seat 6 through a blackening bolt, a blackening nut and a gasket.

Still contain sleeve pipe 1, oil tank 3 and wiring terminal box 4, sleeve pipe 1 is installed on the upper portion of oil tank cap 2, and the cable of sleeve pipe 1 passes inverted current transformer 5, and wiring terminal box 4 is installed on oil tank 3, and the outgoing line of inverted current transformer 5 is connected to on the wiring terminal box 4.

In practical application, as shown in fig. 3, the device is combined into an inverted current transformer 5 by a supporting cylinder 7, a paper ring 8, an end insulator 9, a supporting plate 10 and a current transformer 11. The paper ring 8 is placed at the bottom of the supporting cylinder 7 firstly, then the current transformer 11 is placed, the current transformer is pressed through the end insulation 9, the supporting cylinder is filled with the paper ring 8, the transformer core is prevented from moving up and down, and the current transformer is prevented from rotating by inserting the three supporting plates 10 between the current transformer 11 and the supporting cylinder 7.

As shown in fig. 1, a sleeve 1 is installed on an oil tank cover 2, an inverted current transformer 5 is fixed on a fixing seat 6 on the inner side of the oil tank cover 2 through a blackening bolt, a blackening nut and a gasket, a cable of the sleeve 1 passes through the inverted current transformer 5, a terminal box 4 is installed on an oil tank 3, and an outlet of the current transformer is connected to the terminal box 4.

Claims

1. The built-in current transformer structure is characterized in that: the device comprises a supporting cylinder (7), three paper rings (8), end insulators (9), supporting plates (10) and current transformers (11), wherein the current transformers (11) are placed inside the supporting cylinder (7), the end insulators (9) are tightly pressed at the end parts of the current transformers (11), the paper rings (8) are arranged at the bottom of the supporting cylinder (7) and are filled in gaps between the supporting cylinder (7) and the current transformers (11), and the supporting plates (10) are inserted between the current transformers (11) and the supporting cylinder (7); an inverted current transformer (5) is formed by a supporting cylinder (7), a paper ring (8), an end insulator (9), a supporting plate (10) and a current transformer (11), a fixing seat (6) is arranged on the inner side of the oil tank cover (2), and the inverted current transformer (5) is inversely fixed on the fixing seat (6) through a blackening bolt, a blackening nut and a gasket.

2. The built-in current transformer structure according to claim 1, wherein: still contain sleeve pipe (1), oil tank (3) and wiring terminal box (4), the upper portion at oil tank cap (2) is installed in sleeve pipe (1), and inversion formula current transformer (5) are passed to the cable of sleeve pipe (1), and wiring terminal box (4) are installed on oil tank (3), and the line connection of being qualified for the next round of competitions of inversion formula current transformer (5) is on wiring terminal box (4).