CN214753421U

CN214753421U - Generator circuit breaker and isolated phase enclosed bus connecting structure

Info

Publication number: CN214753421U
Application number: CN202120560720.9U
Authority: CN
Inventors: 任洪涛
Original assignee: PowerChina Huadong Engineering Corp Ltd
Current assignee: PowerChina Huadong Engineering Corp Ltd
Priority date: 2021-03-18
Filing date: 2021-03-18
Publication date: 2021-11-16
Anticipated expiration: 2031-03-18

Abstract

The utility model provides a connection structure of a generator breaker and an isolated phase enclosed bus, which comprises a flexible connection line, a transition bar, a bus fitting head, a bus conductor, a current transformer, an insulating screw, an enclosed bus shell, a cover plate and a bolt; the head of the bus conductor does not extend to the port of the closed bus shell, but has a section distance from the port, the closed bus shell is provided with a current transformer inlet and outlet at the upper part of a space corresponding to the section distance, and the current transformer inlet and outlet are connected with a cover plate which can be opened and closed. The utility model discloses can make things convenient for the current transformer dismouting of bulky to during the generator circuit breaker action, the vibration that arouses can not transmit to from looks enclosed bus conductor and current transformer, even extreme operating mode also only can harm the transition row, from looks enclosed bus main part can not influenced.

Description

Generator circuit breaker and isolated phase enclosed bus connecting structure

Technical Field

The utility model relates to an electrical equipment installs the field, especially relates to a generator circuit breaker and from looks enclosed bus connection structure.

Background

For the generator with single machine capacity exceeding 100MW, the rated current is large, and the outlet of the generator is usually led out by an isolated phase enclosed bus. According to the standard requirement, a special generator breaker is required to be arranged at the outlet of the generator, and current transformers are arranged on two sides of the generator breaker. Therefore, the generator breaker needs to be connected with an isolated phase closed bus, and in the conventional design, the current transformer is installed by firstly placing the current transformer in the generator breaker, and after the isolated phase closed bus conductor is connected with the generator breaker conductor, the current transformer is pulled back and fixed. However, when the impedance of the power grid system is small and the short-circuit current at the outlet of the generator is large, the size of the current transformer is large, the internal space of the breaker of the generator is not enough for placement, and the breaker of the generator cannot be assembled and disassembled according to the conventional scheme. Especially, in recent years, the power grid is rapidly developed, the short-circuit current is larger, and the problems are more and more prominent. Or the inner diameters of the isolated phase enclosed bus conductor and the current transformer are less than the inner diameter of the generator breaker conductor, so that the isolated phase enclosed bus conductor and the current transformer cannot be normally detached. Therefore, the device for connecting the generator circuit breaker and the isolated phase enclosed bus convenient to disassemble and assemble in the large-volume current transformer is researched, and has practical value.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a generator circuit breaker and enclosed bus connection structure can make things convenient for the current transformer dismouting of bulky. Therefore, the utility model adopts the following technical scheme.

A connection structure of a generator circuit breaker and an isolated phase enclosed bus is characterized by comprising a flexible connection line, a transition bar, a bus fitting head, a bus conductor, a current transformer, an insulation screw, an enclosed bus shell, a cover plate and a bolt; one end of the soft connecting wire is connected with a generator circuit breaker conductor, the other end of the soft connecting wire is connected with the transition row through a bolt, and the other end of the transition row is connected with the bus fitting head through a bolt; the current transformer is sleeved at the front end of the bus conductor, the insulating screw penetrates through the opening of the current transformer to fix the current transformer on the bus conductor, and the end part of the bus conductor is connected with the bus hardware fitting head after penetrating through the current transformer;

the head of the bus conductor does not extend to the port of the closed bus shell, but has a section distance from the port, the closed bus shell is provided with a current transformer inlet and outlet at the upper part of a space corresponding to the section distance, and the current transformer inlet and outlet are connected with a cover plate which can be opened and closed.

Further, the part of the bus conductor sleeved by the current transformer is positioned in the coverage range of the current transformer, which is expanded to the position of the bus conductor, so that the insulating screw rod on the current transformer sleeved outside the bus conductor is exposed in the coverage range.

Further, the flexible connecting line includes copper pigtail, copper preforming, trompil, copper pigtail both ends are fastened with the copper preforming, the copper preforming sets up the trompil for pass connecting bolt.

Further, the bus bar conductor can be aluminum or copper, the bus bar shell is made of aluminum, and the transition row can be aluminum or copper.

Further, the connection location of the flexible connection line to the transition row is near a port of the generator circuit breaker housing.

The utility model discloses it is to have following beneficial effect at least:

1. when the generator breaker acts, the caused vibration cannot be transmitted to the isolated phase enclosed bus conductor and the current transformer, the transition row is only damaged even under extreme working conditions, and the isolated phase enclosed bus main body cannot be influenced;

2. the circuit transformer is convenient and flexible to mount and dismount, and the shell or the conductor of the isolated-phase closed bus does not need to be dismounted;

3. the outgoing line of the circuit transformer is convenient to wire and maintain.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a schematic structural diagram of a flexible connecting line in the present invention;

3-1, 3-2 are an indicating view and a side view, respectively, of a bus bar fitting head;

fig. 4 is a sectional view taken along line a-a of fig. 1.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

Reference is made to the accompanying drawings. The utility model provides a generator circuit breaker and enclosed bus connection structure, including flexible connecting line 1, excessive row 2, generating line gold utensil head 3, bus conductor 4, current transformer 5, insulating screw 6, enclosed bus shell 7, apron 8, staple bolt 9, connecting bolt 10. One end of the soft connecting wire 1 is connected with the generator circuit breaker conductor 100 through a connecting bolt 10, the other end of the soft connecting wire is connected with one end of the transition row 2, and the connecting position of the soft connecting wire 1 and the transition row is near the port of the generator circuit breaker shell 200; the other end of the transition row 2 is connected with a bus fitting head 3 through a bolt 14; the current transformer 5 is sleeved at the front end of the bus conductor 4, the insulating screw 6 penetrates through an opening of the current transformer 5 to fix the current transformer on the bus conductor 4, and the bus conductor 4 penetrates through the current transformer 5 and then is connected with the bus hardware fitting head 3; the closed bus shell 4 is welded with the generator breaker shell 200 and is fastened by adopting an anchor ear 9.

The head of the bus bar conductor 4 does not extend to the port 70 of the closed bus bar housing 7, but has a section distance from the port, the distance is used for an operation space of the current transformer 5 sleeved on the bus bar conductor 4, the closed bus bar housing 7 is provided with a current transformer inlet and outlet 71 at the upper part of the section space, and the inlet and outlet 71 can be closed and opened by connecting a cover plate 8 through bolts.

The coverage area of the current transformer inlet and outlet 71 also includes the part of the bus conductor 4 sleeved by the current transformer 5, so that the insulating screw 6 on the current transformer 5 sleeved outside the bus conductor 4 is exposed in the coverage area, and the operation is more convenient.

Referring to fig. 2, the flexible connecting wire 1 includes a copper braid 11, a copper pressing piece 12, and an opening 13. The two ends of the copper braid 11 are fastened by copper pressing sheets 12, and holes 13 are formed in the copper pressing sheets 12 and used for penetrating through the connecting bolts 10.

Referring to fig. 3-1 and 3-2, the hardware fitting head 3 is an 18-sided copper ring, and each side of the hardware fitting head is provided with two bolt holes for connecting with the transition row 2; the end part of the hardware fitting head 3 has a certain gradient and can be partially deeply welded with the bus conductor 4.

The bus conductor 4 is made of aluminum, the closed bus shell 7 is made of aluminum, and the transition row 2 is made of copper.

The utility model discloses a concrete installation steps as follows:

the first step is as follows: the generator breaker shell 200 and the isolated phase enclosed bus shell 6 are welded and fastened by adopting a hoop 8;

the second step is that: putting a current transformer 5 into the open hole 70 at the upper part of the isolated phase closed bus, penetrating the current transformer to the isolated phase closed bus conductor, and fixing the current transformer on the bus conductor 4 by adopting an insulating screw 6;

the third step: connecting the transition row 2 with the bus fitting head 3 by using a connecting bolt 10;

the fourth step: connecting transition row 2 with generator circuit breaker conductor 100 using flexible connection line 1

The fifth step: and covering the cover plate 8 of the current transformer inlet and outlet 71 and fastening by using a connecting bolt.

When the current transformer 5 is disassembled, the cover plate 8 is opened, the nut 14 is disassembled, so that the transition row 2 is disassembled, then the bus fitting head 3 is disassembled, and then the insulating screw 6 is disassembled, so that the current transformer 5 can be separated from the head of the bus conductor 4 and hung out from the current transformer inlet and outlet 71.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, i.e. all equivalent changes and modifications made according to the present invention are covered by the scope of the claims of the present invention, which is not illustrated herein.

Claims

1. A connection structure of a generator circuit breaker and an isolated phase enclosed bus is characterized by comprising a flexible connection line, a transition bar, a bus fitting head, a bus conductor, a current transformer, an insulation screw, an enclosed bus shell, a cover plate and a bolt; one end of the soft connecting wire is connected with a generator circuit breaker conductor, the other end of the soft connecting wire is connected with the transition row through a bolt, and the other end of the transition row is connected with the bus fitting head through a bolt; the current transformer is sleeved at the front end of the bus conductor, the insulating screw penetrates through the opening of the current transformer to fix the current transformer on the bus conductor, and the end part of the bus conductor is connected with the bus hardware fitting head after penetrating through the current transformer;

2. The connection structure of the generator breaker and the isolated phase enclosed bus bar according to claim 1, wherein the flexible connection line comprises a copper braid, a copper pressing plate and an opening, two ends of the copper braid are fastened by the copper pressing plate, and the copper pressing plate is provided with an opening for passing through the connection bolt.

3. The structure as claimed in claim 1, wherein the connection point of the flexible connecting line and the transition row is located near the port of the generator breaker housing.

4. The connection structure of the generator circuit breaker and the isolated phase enclosed bus as claimed in claim 1, wherein the part of the current transformer inlet/outlet which is enlarged to the position where the bus conductor is sleeved by the current transformer is within the coverage area of the current transformer inlet/outlet, so that the insulation screw rod of the current transformer sleeved outside the bus conductor is exposed in the coverage area.