CN220774115U

CN220774115U - Current transformer of small-sized high-voltage cabinet high-voltage measuring device

Info

Publication number: CN220774115U
Application number: CN202322086078.7U
Authority: CN
Inventors: 黄在先
Original assignee: Fateng Electric Power Equipment Jiangsu Co ltd
Current assignee: Fateng Electric Power Equipment Jiangsu Co ltd
Priority date: 2023-08-04
Filing date: 2023-08-04
Publication date: 2024-04-12
Anticipated expiration: 2033-08-04

Abstract

The utility model discloses a current transformer of a small high-voltage cabinet high-voltage measuring device, relates to the technical field of power distribution, and aims to solve the problems of small creepage distance and low pollution level of a fully-closed multi-winding current transformer in a switch cabinet of an existing power system. The body one side surface is equipped with circular shape first business turn over end conductive part, and the body upper surface is equipped with the second business turn over end conductive part of rectangle, and both ends surface all is equipped with insulating barrier about the body, and with body structure as an organic whole, the body includes first business turn over end conductive part, secondary winding output terminal, electric capacity partial voltage output terminal and iron core and secondary winding. The current transformer and the capacitive voltage divider are independently arranged in a row to form an integrated layout, so that installation space and secondary wiring multipoint laying are reduced, operation safety of using equipment is ensured, insulation distance is increased, and power supply reliability is improved.

Description

Current transformer of small-sized high-voltage cabinet high-voltage measuring device

Technical Field

The utility model relates to the technical field of power distribution, in particular to a current transformer of a small high-voltage cabinet high-voltage measuring device.

Background

The utility model provides a post or wear wall type current transformer is the current, electric energy or relay protection electric quantity conversion equipment in 10kV electric power system switch cabinet, its mounted position is mainly 10kV switch cabinet lower part, the mounting means adopts side dress or the form of forward dress mostly, the current transformer that current electric power system used exists the volume greatly, the surface creepage distance is little, disadvantages such as dirty grade is low, product performance is prolonged along with the live time, copper bar overlap joint department does not have insulating shielding, along with the increase of service life whole insulation decline, can not satisfy the needs of growing electric power system, become the hidden danger of equipment safe operation in the electric power system, there is certain restriction to the use occasion, current transformer and the independent branch of electric capacity partial pressure sensor are listed as the unit arrangement.

Therefore, a current transformer of a small-sized high-voltage cabinet high-voltage measuring device is provided for solving the problems.

Disclosure of Invention

The utility model aims to provide a current transformer of a small high-voltage cabinet high-voltage measuring device, which aims to solve the problems of small creepage distance and low pollution level of a fully-closed multi-winding current transformer in a switch cabinet of an existing power system in the background technology.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a small-size high-voltage board high-voltage measurement device current transformer, includes the body, body one side surface is equipped with circular shape first business turn over end conductive piece, the body upper surface is equipped with the second business turn over end conductive piece of rectangle, both ends surface all is equipped with insulating barrier about the body, and with body structure as an organic whole, the body includes first business turn over end conductive piece, secondary winding output terminal, electric capacity partial voltage output terminal and iron core and secondary winding.

By adopting the technical scheme, the arrangement of the independent separate columns of the current transformer and the capacitive voltage divider is changed into an integrated layout, so that the installation space and secondary wiring multipoint laying are reduced, the operation safety of using equipment is ensured, the insulation distance is increased, and the power supply reliability is improved.

Further, the body one side surface is provided with the multilayer ladder that is used for increasing creepage distance, two insulating baffle inboard all installs many strengthening ribs.

Through adopting above-mentioned technical scheme, multilayer ladder increases creepage distance, and embedded copper inserts that is not less than diameter 50mm simultaneously, insulating baffle inboard or outside are equipped with the reinforcement strip, guarantee insulating baffle fixed strength.

Further, 4 mounting holes are formed in the second inlet and outlet end conductive piece, and red copper is adopted for the copper pieces in the first inlet and outlet end conductive piece and the second inlet and outlet end conductive piece.

Through adopting above-mentioned technical scheme, first business turn over end conductive piece leaves the embedded special high strength thread bush of screw hole that is not less than M10 in the installation, and the static contact in the cubical switchboard can direct mount above, reduces the multiple spot overlap joint, reduces contact resistance, and the mounting hole screw thread size of second business turn over end conductive piece is not less than the embedded special thread bush of M12.

Further, the iron core and the secondary winding are respectively composed of a first iron core and a secondary winding A, a first iron core and a secondary winding B and a first iron core and a secondary winding C in parallel, and the secondary windings in the iron core and the secondary winding are a plurality of groups of windings which are respectively wound on each accurate secondary winding iron core.

Through adopting above-mentioned technical scheme, secondary winding's secondary binding post is drawn forth by body bottom one end, arranges according to the arrangement, and secondary binding post screw adopts former machine screw or outer hexagon screw.

Further, the main loop in the body is connected with the copper bar penetrating through the iron core and the secondary winding, and the front end and the rear end of the main loop connected with the copper bar are respectively connected with the first inlet and outlet end conductive piece and the second inlet and outlet end conductive piece.

Further, the secondary winding output terminal is located at the other side of the body and is an output end of the iron core and the secondary winding, and the capacitive voltage division voltage output terminal is led out from one end of the bottom of the body and is distributed above the secondary winding output terminal.

By adopting the technical scheme, the capacitive partial pressure induction coil in the body can be provided with a shielding net or a core rod at the periphery of the secondary winding on the iron core, an induced internal magnetic field is converted into a voltage signal, the voltage signal is led out from one end of the bottom of the body through the secondary winding output terminal, the arrangement of multiple elements is reduced, and the installation space is reduced.

Further, four mounting embedded parts for fixing are arranged in the body.

By adopting the technical scheme, the body is provided with the embedded part. Fixing is performed.

Compared with the prior art, the utility model has the beneficial effects that:

1. the current transformer and the capacitive voltage divider are independently arranged in a row to form an integrated layout, so that installation space and secondary wiring multipoint laying are reduced, operation safety of using equipment is ensured, insulation distance is increased, and power supply reliability is improved.

Drawings

FIG. 1 is a schematic diagram of the appearance of a transformer according to the present utility model;

FIG. 2 is a second schematic diagram of the appearance of the transformer of the present utility model;

fig. 3 is a schematic diagram of the internal structure of the transformer according to the present utility model.

In the figure: 1, a body; 2. an insulating baffle; 3. reinforcing ribs; 4. a first in-out end conductive member; 5. a secondary winding output terminal; 6. a capacitive divided voltage output terminal; 7. a second in-out terminal conductive member; 8. the main loop is connected with the copper bar; 901. a first iron core and a secondary winding A; 902. a first iron core and a secondary winding B; 903. a first iron core and a secondary winding C; 10. and installing the embedded part.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which some, but not all embodiments of the utility model are shown and described. All other embodiments, which can be made by those skilled in the art based on the embodiments in this document without making any inventive effort, are intended to be within the scope of the present utility model.

Fig. 1-3 schematically illustrate one embodiment of the present utility model:

the first in-out end conductive piece 4 is a round copper piece, a special high-strength threaded sleeve is embedded in a threaded hole which is not smaller than M10 is reserved at the top in the installation process, a static contact in a switch cabinet can be directly installed on the first in-out end conductive piece, multi-point lap joint is reduced, contact resistance is reduced, the second in-out end conductive piece 7 is connected with 2 to 4 installation holes on the copper piece, the size of the threads of the installation holes is not smaller than M12, insulation baffles 2 are respectively arranged on the left and right sides of the connection copper piece of the second in-out end conductive piece 7, the insulation baffles 2 and the body 1 of the current transformer are in an integrated structure, a wiring terminal of a capacitive voltage division voltage output terminal 6 is led out from one end at the bottom of the body 1, and a bottom plate fixing screw of the body 1 on the side of the layout and a secondary winding output terminal 5 is not smaller than 4M 8 and is used as a main body to be fixed;

the round copper piece of the first inlet and outlet end conductive piece 4 and the copper piece of the rectangular copper piece of the second inlet and outlet end conductive piece 7 are made of red copper with copper content of 99.9%, the two copper pieces are welded and flexibly connected or bent copper bars can be connected, a main loop is connected with the copper bars 8 to penetrate through iron cores and secondary windings, the secondary windings are a plurality of groups of windings and are respectively wound on the accurate secondary winding iron cores, secondary winding output terminals 5 of the secondary windings are led out from one end of the bottom of the body 1 and are distributed according to an arrangement mode, and secondary wiring terminal screws adopt original machine screws or outer hexagon screws;

the left and right sides of the rectangular connection copper piece of the second business turn over end conducting piece 7 are respectively equipped with an insulating baffle 2, and insulating baffle 2 and current transformer's body 1 structure as an organic whole is equipped with strengthening rib 3 in insulating baffle 2 inboard or the outside, guarantees insulating baffle 2 fixed strength, and insulating baffle 2 upwards extends from body 1 top, and when body 1 bottom hoist and mount direction is downwardly extending, the extension height is not less than 150mm, and insulating baffle 2 top both ends are the circular arc angle.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a small-size high-voltage board high-voltage measurement device current transformer, includes body (1), its characterized in that: the utility model discloses a high-voltage transformer, including body (1), electric power source, iron core and secondary winding, body (1) one side surface is equipped with circular shape first business turn over end conductive piece (4), body (1) upper surface is equipped with rectangle second business turn over end conductive piece (7), both ends surface all is equipped with insulating baffle (2) about body (1), and with body (1) structure as an organic whole, body (1) include first business turn over end conductive piece (4), secondary winding output terminal (5), electric capacity partial voltage output terminal (6) and iron core and secondary winding.

2. The current transformer of the small high-voltage cabinet high-voltage measurement device according to claim 1, wherein: the body (1) one side surface is provided with the multilayer ladder that is used for increasing creepage distance, two insulating baffle (2) inboard is all installed many strengthening ribs (3).

3. The current transformer of the small high-voltage cabinet high-voltage measurement device according to claim 1, wherein: 4 mounting holes are formed in the second inlet and outlet end conducting piece (7), and copper pieces in the first inlet and outlet end conducting piece (4) and the second inlet and outlet end conducting piece (7) are made of red copper.

4. The current transformer of the small high-voltage cabinet high-voltage measurement device according to claim 1, wherein: the iron core and the secondary winding are respectively composed of a first iron core and a secondary winding A (901), a first iron core and a secondary winding B (902) and a first iron core and a secondary winding C (903) in parallel, and the secondary windings in the iron core and the secondary winding are respectively wound on each accurate secondary winding iron core in a plurality of groups.

5. The current transformer of the small high-voltage cabinet high-voltage measurement device according to claim 1, wherein: the main loop in the body (1) is connected with the copper bar (8) to penetrate through the iron core and the secondary winding, and the front end and the rear end of the main loop connected with the copper bar (8) are respectively connected with the first inlet end conductive piece (4) and the second inlet end conductive piece (7).

6. The current transformer of the small high-voltage cabinet high-voltage measurement device according to claim 1, wherein: the secondary winding output terminal (5) is positioned at the other side of the body (1) and is an output end of an iron core and a secondary winding, and the capacitive voltage division voltage output terminal (6) is led out from one end of the bottom of the body (1) and is distributed above the secondary winding output terminal (5).

7. The current transformer of the small high-voltage cabinet high-voltage measurement device according to claim 1, wherein: four mounting embedded parts (10) used for fixing are arranged in the body (1).