CN208094000U - High-tension switch cabinet group - Google Patents

Abstract

The utility model relates to a high-voltage switch cabinet group. The high-voltage switchgear group includes a first cabinet and a second cabinet arranged side by side, the first branch bus is provided in the first cabinet, the second branch bus is provided in the second cabinet, and the three single-phase lines of the first branch bus The three single-phase lines of the second branch bus are correspondingly connected through the tie busbar. The high-voltage switchgear group also includes three-phase current transformers respectively set on the three single-phase lines of the tie busbar. The first cabinet is equipped with There is an incoming cable connected to the first branch busbar. The connecting busbar of the high-voltage switchgear group realizes the connection of the first branch busbar and the second branch busbar. Set the space for the incoming cables so that the distance between the incoming cables and the first branch busbar and the bottom of the first cabinet meets the requirements of the national standard.

Description

High voltage switchgear group

technical field

The utility model relates to a high-voltage switch cabinet group.

Background technique

With the development and transformation of my country's urban and rural power grids, KYN28A-12 armored removable AC metal-enclosed switchgear is widely used in large-scale power plants, substations and industrial enterprises in AC with a rated voltage of 3.6kV ~ 12kV and a rated frequency of 50Hz. In the power grid, when the switchgear is in use, multiple switchgears are often arranged side by side to form a switchgear group for receiving and distributing electric energy.

The Chinese patent application with the publication number CN106159688A and the publication date of 2016.11.23 discloses a back-to-back 12 kV switchgear group. The switchgear group includes a first cabinet and a second cabinet. The top of the first cabinet is provided with a belt A , B, C three-phase terminals of the first phase modulation chamber, the top of the second cabinet is equipped with A, B, C three-phase terminals of the second phase modulation chamber, the first cabinet and the second cabinet are close to each other back to back and overlapped, the A, B, C three-phase branch terminals in the first phase modulation chamber and the fixed end of the side wall of the first phase modulation chamber are respectively fixed with A, B, and C three-phase branch terminals, and the A, B, and C three-phase branch terminals are fixed respectively. The phase branch terminals all pass through the back side of the first cabinet body and the back side of the second cabinet body in turn and extend into the second phase modulation chamber, and the A phase terminal in the second phase modulation chamber crosses the line connection of the B phase terminal in it The phase branch terminal, the C-phase terminal in the second phase modulation chamber is connected to the C-phase terminal across the line of the B-phase terminal in it. The switchgear group has the advantages of simple structure, small space occupation and low use cost.

Many state grid projects have high requirements on the current transformer of the switch cabinet. In order to ensure the technical parameters, only larger size transformers can be used. In order to facilitate the installation of the transformer and make the distance between the cable lug and the bottom of the switch cabinet meet the national standard requirements , the routinely adopted scheme is to widen and lengthen the cabinet body, but widening and lengthening the cabinet body cannot make effective use of the space in the switch cabinet, and the large cabinet body is not convenient for on-site installation.

Utility model content

The purpose of the utility model is to provide a high-voltage switchgear group, which solves the problem that the space in the switchgear cannot be effectively used and the installation is inconvenient due to the large size of the transformer in the switchgear in the prior art.

In order to achieve the above object, the technical scheme of the high-voltage switchgear group of the present invention is: the high-voltage switchgear group includes a first cabinet body and a second cabinet body arranged side by side, a first branch bus bar is arranged in the first cabinet body, and a second cabinet body The body is provided with a second branch busbar, and the three single-phase lines of the first branch busbar and the three single-phase lines of the second branch busbar are correspondingly connected through the connecting busbar. The high-voltage switchgear group also includes For the three-phase current transformers on the three single-phase lines, the incoming cables connected to the first branch bus are arranged in the first cabinet.

Its beneficial effects are: the connection busbar of the high-voltage switchgear group realizes the connection between the first branch busbar and the second branch busbar, and the three-phase current transformers are respectively set on the three single-phase lines of the connection busbar, which is the first There is a space for setting the incoming cable in the cabinet, so that the distance between the connector connecting the incoming cable and the first branch busbar and the bottom of the first cabinet meets the requirements of the national standard.

The incoming cables are introduced from the bottom of the first cabinet.

The three-phase current transformer is arranged on the opposite side walls of the first cabinet and the second cabinet, and the two ends of the three-phase current transformer extend into the first cabinet and the second cabinet respectively.

The connecting busbar is a horizontal busbar running through the first cabinet and the second cabinet.

The three single-phase lines of the connecting busbar are arranged in an up-down direction.

The phase sequence of the three single-phase line outlets of the first branch busbar and the second branch busbar is C phase, B phase, and A phase from top to bottom, and the phase sequence of the three single-phase lines connected to the busbar is from top to bottom Phase C, Phase B, and Phase A in sequence.

Its beneficial effect is that such a structure facilitates the connection of the branch busbar in the first cabinet and the branch busbar in the second cabinet with the tie busbar, and reduces the crossing of the three single-phase lines of the branch busbars in the two cabinets when they are connected to the tie busbar. .

The phase sequence of the three single-phase lines of the first branch busbar and the second branch busbar is A phase, B phase, and C phase in the extension direction of the tie busbar, and the first cabinet body and the second cabinet body are aligned along the tie busbar. The extension directions are arranged side by side.

The second cabinet is provided with a three-phase current transformer through which the three single-phase lines of the branch bus in the second cabinet pass.

Description of drawings

Fig. 1 is the structural representation of the connection of two cabinet branch busbars in embodiment 1 of the high voltage switchgear group of the present invention;

Fig. 2 is a partial cross-sectional view of a side view of the first cabinet body of the high-voltage switch cabinet group shown in Fig. 1;

Fig. 3 is a layout diagram of the A-phase line of the first branch bus shown in Fig. 2;

Fig. 4 is the cross-sectional view along M-M line of Fig. 3;

Fig. 5 is a layout diagram of the B-phase line of the first branch bus shown in Fig. 2;

Fig. 6 is the cross-sectional view of Fig. 5 along M-M line;

Fig. 7 is a layout diagram of the C-phase line of the first branch bus shown in Fig. 2;

Fig. 8 is the sectional view of Fig. 7 along M-M line;

Fig. 9 is a partial cross-sectional view of the side view of the second cabinet body of the high-voltage switch cabinet group shown in Fig. 1;

Fig. 10 is a layout diagram of the phase A line of the second branch bus shown in Fig. 9;

Fig. 11 is the sectional view of Fig. 10 along M-M line;

Fig. 12 is a layout diagram of the B-phase line of the second busbar shown in Fig. 9;

Figure 13 is a cross-sectional view along the M-M line of Figure 12;

Fig. 14 is a layout diagram of the C-phase line of the second branch bus shown in Fig. 9;

Fig. 15 is a sectional view along the M-M line of Fig. 14;

Explanation of reference signs: 1. The first cabinet body; 2. The second cabinet body; 3. The first branch busbar; 4. The second branch busbar; 5. The connecting busbar; 6. The first contact box; 1st A-phase current transformer; 72. The first B-phase current transformer; 73. The first C-phase current transformer; 8. Incoming cable; 9. The second contact box; 101. The second A-phase current transformer ; 102. The second B-phase current transformer; 103. The second C-phase current transformer.

Detailed ways

Embodiments of the present utility model will be further described below in conjunction with the accompanying drawings.

Embodiment 1 of the high-voltage switchgear group of the present invention, as shown in Figures 1 to 15, the high-voltage switchgear group includes a first cabinet body 1 and a second cabinet body 2 arranged side by side, and the first cabinet body 1 is provided with The first branch bus 3, the second cabinet 2 is provided with the second branch bus 4, the three single-phase lines of the first branch bus 3 and the three single-phase lines of the second branch bus 4 are connected correspondingly through the connecting busbar 5, and the high voltage The switchgear group also includes three-phase current transformers respectively sleeved on the three single-phase lines of the connecting busbar 5 , and the incoming cable 8 connected to the first branch busbar 3 is arranged inside the first cabinet body 1 .

In this embodiment, the connecting busbar 5 is a horizontal busbar that runs through the first cabinet body 1 and the second cabinet body 2, and the phase sequence of the three single-phase line leads of the branch busbars in the first switchgear and the second switchgear is from the top to the bottom. The bottom is C phase, B phase and A phase, and the three single-phase lines connecting busbar 5 are arranged in the up and down direction, and the phase sequence of the three single-phase lines connecting busbar 5 is C phase and B phase from top to bottom. , Phase A.

In this embodiment, the incoming cable 8 is introduced from the bottom of the first cabinet body 1 , and the incoming cable 8 is located below the first contact box 6 in the first cabinet body 1 . The first three-phase current transformers are provided on the opposite side walls of the first cabinet body 1 and the second cabinet body 2, and the first three-phase current transformers include first A The phase current transformer 71, the first B-phase current transformer 72 and the first C-phase current transformer 73, the two ends of each phase current transformer extend into the first cabinet body 1 and the second cabinet body 2 respectively.

In this embodiment, a second three-phase current transformer is provided below the second contact box 9 in the second cabinet body 2, and the second three-phase current transformer includes three busbars respectively connected to the branch bus bars in the second cabinet body 2. The second A-phase current transformer 101 , the second B-phase current transformer 102 and the second C-phase current transformer 103 correspond to the single-phase line.

In this embodiment, the phase sequences of the three single-phase lines of the first branch bus bar 3 and the second branch bus bar 4 are A phase, B phase, and C phase in the extension direction of the connecting bus bar 5, and the first cabinet body 1 and the The second cabinets 2 are arranged side by side along the extension direction of the connecting busbar 5 .

During the power distribution process of the high-voltage switchgear group, the incoming cable 8 is connected to the branch busbar below the contact box in the first cabinet 1 of the high-voltage switchgear, and the branch busbar in the first cabinet 1 is connected to the connection The busbar 5 is correspondingly connected, and the three single-phase lines connecting the busbar 5 respectively pass through the first three-phase current transformer to pass through the first cabinet 1, and the three single-phase lines of the branch bus in the second cabinet 2 pass through the first cabinet body 2 respectively. The two-phase and three-phase current transformers are connected with the connecting bus bar 5 extending into the second cabinet body 2, thereby realizing the connection between the first branch bus bar 3 in the first cabinet body 1 and the second branch bus bar 4 in the second cabinet body 2 connected, both the first cabinet body 1 and the second cabinet body 2 can perform power distribution work, which can meet the use requirements.

The connection busbar 5 of the high-voltage switchgear group of the utility model realizes the connection between the first branch busbar 3 and the second branch busbar 4, and the three-phase current transformers are respectively set on the three single-phase lines of the connection busbar 5, which is the first branch busbar 5. There is a space for setting the incoming cable 8 in a cabinet, so that the distance between the joint connecting the incoming cable 8 and the first branch bus bar 3 and the bottom of the first cabinet meets the requirements of the national standard.

Embodiment 2 of the high-voltage switchgear group of the utility model is different from Embodiment 1 in that the phase sequence of the three single-phase line leads of the busbar 5 is A phase, B phase, and C phase from top to bottom. However, this setting may cause the three single-phase lines of the branch busbars in the two cabinets to cross when they are connected to the tie busbar 5 .

Embodiment 3 of the high-voltage switchgear group of the utility model differs from Embodiment 1 in that no current transformer is provided below the contact box in the second cabinet body 2 .

Embodiment 4 of the high-voltage switchgear group of the present utility model is different from Embodiment 1 in that the first three-phase current transformer is arranged on the side wall of the first cabinet body, and the connecting busbar is drawn out of the first cabinet body 1 5. Pass through the first three-phase current transformer in the first cabinet 1, then pass through the side wall of the first cabinet 1 and enter the second cabinet.

Claims (8)

1. it is female it to be equipped with the first branch high-tension switch cabinet group, including the first cabinet and the second cabinet that are set up in parallel, in the first cabinet Line, the second cabinet is interior to be equipped with the second branch bar, it is characterised in that：Three phase lines of the first branch bar and the second branch are female Three phase lines of line are correspondingly connected with by getting in touch with busbar, and the high-tension switch cabinet group further includes being respectively sleeved at contact busbar Threephase current transformer in three phase lines, the first cabinet is interior to be equipped with the inlet wire cable being connect with the first branch bar.

2. high-tension switch cabinet group according to claim 1, it is characterised in that：The inlet wire cable by the first cabinet bottom It introduces.

3. high-tension switch cabinet group according to claim 1, it is characterised in that：The threephase current transformer is arranged first On the opposite side wall of cabinet and the second cabinet, the both ends of threephase current transformer are respectively protruding into the first cabinet and the second cabinet.

4. high-tension switch cabinet group according to claim 1 or 2 or 3, it is characterised in that：The contact busbar is through first The horizontal busbar of cabinet and the second cabinet.

5. high-tension switch cabinet group according to claim 4, it is characterised in that：Three phase lines of the contact busbar are along upper Lower direction arranged.

6. high-tension switch cabinet group according to claim 5, it is characterised in that：First branch bar and the second branch are female The phase sequence of three phase line exits of line is C phases, B phases, A phases from top to bottom, gets in touch with the phase sequence of three phase lines of busbar It is followed successively by C phases, B phases, A phases from top to bottom.

7. high-tension switch cabinet group according to claim 4, it is characterised in that：First branch bar and the second branch are female The phase sequence of three phase lines of line is A phase, B phase, C phase, the first cabinet and the second cabinet edge on contact busbar extending direction Busbar extending direction is got in touch with to be arranged side by side.

8. high-tension switch cabinet group according to claim 1 or 2 or 3, it is characterised in that：It is equipped in second cabinet for the The threephase current transformer that three phase lines of the branch bar in two cabinets pass through.