CN115967017B - A compact layout structure of power distribution outlets - Google Patents

Abstract

The invention discloses a compact layout structure of power distribution outlets, which belongs to the technical field of power distribution lines installation, and includes a power distribution device building, a GIS outlet rack, and a system composed of A phase lines, B phase lines and C phase lines arranged in parallel. circuit; the C-phase line is located directly above the A-phase line, the B-phase line is located directly above the C-phase line, and the upper floor of the power distribution device is equipped with the A-phase line, the The B-phase line and the C-phase line correspond to the insulated fixtures that are connected. The end of the insulated fixture that is far away from the power distribution device building is provided with a hanging point. The A-phase line and the B-phase line in each group of circuits The distances between the phase line and the hanging point of the C-phase line and the outer wall of the power distribution device building are not equal. The compact layout structure of the power distribution outlets of the present invention can reduce the lateral spacing of the loops, reduce the overall floor area of the power distribution device building, and is not easy to be short-circuited due to line crossing in windy weather, and has high safety.

Description

A compact layout structure of power distribution outlets

technical field

The invention relates to the technical field of distribution line installation, in particular to a compact arrangement structure of distribution outlet lines.

Background technique

The existing GIS power distribution device is usually arranged indoors, and the GIS outlet frame extends to the outdoor outlet balcony.

In order to facilitate the A, B, and C three-phase lines to go out, and to ensure the necessary distance between phases and circuits, the A, B, and C three-phase lines of the power distribution device building in the prior art are arranged horizontally in the same row. Since a certain distance needs to be reserved between the three-phase lines and between different circuits, this way of outgoing lines will make the horizontal dimension of the power distribution device building large, which will eventually lead to an increase in the volume of the power distribution device building and a large footprint, thereby improving power distribution. The cost of the installation building.

As shown in Figure 1 and Figure 2, when the three-phase lines A, B, and C of the two groups of circuits are arranged horizontally in the same row in the prior art, the ground wire 1' is set above the three-phase lines A, B, and C, and on the balcony of the outgoing line A three-phase arrester 3' is arranged on the outlet side adjacent to the GIS outlet bushing 2', and a phase A voltage transformer 4' is arranged near the A-phase arrester 3'', GIS outlet bushing 2', three-phase arrester 3' and A-phase The voltage transformers 4' are arranged in sequence along the outgoing line direction.

The Chinese invention patent with the patent number ZL201420366718.8 discloses a character-shaped outlet structure of an indoor substation. By optimizing the position of the three-phase wires, the A-phase wires, B-phase wires, and C-phase wires in each group of circuits are arranged in a font , so as to reduce the horizontal gap, reduce the overall floor area of the power distribution device building, save the outgoing line of the power distribution device building, herringbone columns and beams, save land and reduce the cost of the power distribution device building.

However, although the three-phase line arranged in a zigzag shape reduces the lateral distance to a certain extent, in order to ensure that the distance between phases meets the requirements, the GIS outlet bushing connected to the B-phase line of the invention patent is connected to the A-phase line and the C-phase line respectively. The connected GIS outlet bushings are independent of each other, and this GIS outlet bushing belongs to equipment that needs to be separately and specially manufactured, which will increase the manufacturing cost.

Contents of the invention

The technical problem to be solved by the present invention is to provide a compact layout structure of power distribution outlets, which can greatly reduce the lateral size of the power distribution device building, thereby reducing the occupied area, and has high safety.

In order to solve the above-mentioned technical problems, the present invention provides a compact distribution structure for power distribution outlets, including a power distribution device building for installing GIS power distribution devices, a GIS outlet frame extending outside the power distribution device building, and a Above the GIS outlet frame, a loop composed of A-phase wires, B-phase wires and C-phase wires arranged in parallel;

The phase A line is connected to the GIS outlet frame through the down conductor of the A phase line, the phase B line is connected to the GIS outlet frame through the down conductor of the B phase line, and the phase C line is connected to the GIS outlet line The frame is connected through the down conductor of the C-phase line;

The C-phase line is located directly above the A-phase line, and the B-phase line is located directly above the C-phase line;

The minimum distance between the A-phase line, B-phase line and C-phase line is d1, where d1> the minimum allowable value of the distance between phases;

The minimum distance between the A-phase line down conductor, B-phase line down-conductor and C-phase line down-conductor is d2, where d2>the minimum allowable value of the distance between phases;

The upper floor of the power distribution device is provided with an insulating fixture corresponding to the A-phase line, the B-phase line and the C-phase line, and the insulating fixture is located at one end far away from the power distribution device building. There are hanging points, and the distances between the hanging points of the A-phase line, the B-phase line and the C-phase line in each group of circuits and the outer wall of the power distribution device building are not equal.

As an improvement of the above scheme, the distance between the hanging point connected by the C-phase line and the outer wall of the power distribution device building is greater than the distance between the hanging point connected by the B-phase line and the outer wall of the power distribution device building, and the distance between the hanging point connected by the A-phase line The distance between the hanging point and the outer wall of the power distribution device building is greater than the distance between the hanging point connected to the C-phase line and the outer wall of the power distribution device building.

As an improvement to the above solution, a first rod-shaped suspension composite insulator connected to the A-phase line and a second rod-shaped suspension composite insulator connected to the B-phase line are provided on the C-phase line;

The down conductor of the A-phase line and the first rod-shaped suspension composite insulator are sequentially arranged along the direction of the A-phase line away from its hanging point;

The down conductor of the C-phase line, the second rod-shaped suspension composite insulator and the first rod-shaped suspension composite insulator are arranged in sequence along the direction of the C-phase line away from its hanging point;

The down conductor of the B-phase line and the second rod-shaped suspension composite insulator are arranged in sequence along the direction away from the hanging point of the B-phase line.

As an improvement of the above solution, the insulation fixture connected to the A-phase line includes a first tension insulator string and a first extension ring for connecting the first tension insulator string end to end, so One end of the C-phase line down conductor is connected to the C-phase line, and the other end passes through the first extension ring and is connected to the C-phase outlet bushing.

As an improvement of the above solution, the insulation fixtures connected to the C-phase line each include a second tension insulator string and a second extension ring for connecting the second tension insulator string end to end, One end of the B-phase line downconductor is connected to the B-phase line, and the other end passes through the second extension ring and the first extension ring in sequence, and is connected to the B-phase outlet bushing.

As an improvement of the above scheme, the GIS outlet frame is provided with an A-phase outlet sleeve, a B-phase outlet sleeve and a C-phase outlet sleeve, and one end of the A-phase outlet sleeve is connected to the A-phase line down conductor, And the end of the C-phase outlet sleeve connected to the C-phase line down-conductor is extended to the side away from the outer wall of the power distribution device building, and the A-phase outlet sleeve is connected to the A-phase line One end connected to the down-conductor, and one end connected to the C-phase line outlet bushing and the C-phase line down-conductor are away from each other;

The end of the B-phase outlet sleeve connected to the B-phase line down-conductor is extended to the side close to the outer wall of the power distribution device building.

As an improvement of the above solution, it also includes a B-phase arrester connected to the B-phase line through a wire, and the B-phase arrester is arranged between the outer wall of the power distribution device building and the C-phase outlet bushing.

As an improvement of the above solution, it also includes an A-phase voltage transformer connected to the A-phase line, and the A-phase voltage transformer is arranged between the outer wall of the power distribution device building and the A-phase outlet bushing.

As an improvement of the above solution, it also includes an A-phase arrester connected to the A-phase wire through a wire and a C-phase arrester connected to the C-phase wire through a wire;

An outgoing line balcony is provided outside the power distribution device building, the GIS outgoing line rack is set on the outgoing line balcony, the A-phase arrester and C-phase arrester are arranged on a bracket independent of the outgoing line balcony, and the A The phase voltage transformer, the A-phase outlet bushing and the A-phase arrester are arranged in sequence, and the B-phase arrester, the C-phase outlet bushing and the C-phase arrester are arranged in sequence.

As an improvement of the above scheme, it also includes a ground wire arranged above the B-phase line, a bracket is provided on the top of the power distribution device building, and the ground wire and the insulating fixture of the B-phase line are both connected to the The bracket is fixed, and the insulating fixture connected to the A-phase line and the insulating fixture connected to the C-phase line are both fixed to the outer wall of the power distribution device building.

Implement the present invention, have following beneficial effect:

The present invention arranges the three-phase lines in each group of circuits in layers by optimizing the position of the three-phase lines. Specifically, the C-phase line is located directly above the A-phase line, and the B-phase line is located at the C-phase line. When wiring on the outer wall of the power distribution device building, only the distance between the circuits needs to be reserved in the horizontal direction, and the phase-to-phase distance does not need to be reserved. The inter-phase distance uses the height of the outer wall of the power distribution device building, so it reduces The horizontal dimension occupied by each circuit on the outer wall of the power distribution device building reduces the overall floor area of the power distribution device building, saves land and reduces the cost of the power distribution device building.

The C-phase line is located directly above the A-phase line, and the B-phase line is located directly above the C-phase line, so that the outlet points on the outer wall of the power distribution device building are arranged in line with the A on the line iron tower. The wiring points of the phase line, B-phase line and C-phase line are arranged in the same direction, that is, they are all arranged vertically, which avoids three-dimensional crossing of three-phase lines in the air, and further reduces the probability of phase-to-phase short circuit when the line dances in windy weather. high.

The GIS outlet frame is set under the three-phase line. When the three-phase lines are respectively connected to the bushings on the GIS outlet frame through the down-leads of each phase line, because the hanging points of the three-phase lines in each group of circuits are connected with the outside of the power distribution device building The distances between the walls are not equal, so that the hanging points of each phase line are staggered along the length direction of the phase line. When the bushing is connected, it can be staggered by a certain distance from the lower phase line and other phase line down conductors. While reducing the lateral spacing, it is easy to achieve a safe distance between each phase line.

Description of drawings

Fig. 1 is the layout diagram of equipment on the balcony of the GIS outgoing line in the prior art;

Fig. 2 is the left view of Fig. 1;

Fig. 3 is a schematic plan view of an embodiment of a compact arrangement structure of power distribution outlets in the present invention;

Fig. 4 is a schematic cross-sectional structure diagram of the outlet balcony of Fig. 3;

Fig. 5 is a side view of an embodiment of a compact layout structure of power distribution outlets in the present invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

As shown in Fig. 3 to Fig. 5, the present invention discloses an embodiment of a compact distribution structure for power distribution outlets, which specifically includes a power distribution device building 1 for installing a GIS power distribution device, extending to the power distribution device building 1 outside the GIS outlet rack 2, and a circuit formed above the GIS outlet rack 2 and composed of parallel A-phase wires, B-phase wires and C-phase wires; the A-phase wire and the GIS outlet rack 2 The down conductor 3 of the A phase line is connected, the B phase line is connected with the GIS outlet frame 2 through the B phase line down conductor 4, and the C phase line is connected with the GIS outlet frame 2 through the C phase line Line 5 connection; wherein the C-phase line is located directly above the A-phase line, the B-phase line is located directly above the C-phase line, and the A-phase line, B-phase line and C-phase line are between The minimum distance is d1, and d1>the minimum allowable value of the distance between phases; the power distribution device building 1 is provided with insulating fixtures corresponding to the A-phase line, the B-phase line and the C-phase line, so The insulating fixture is provided with a hanging point a corresponding to the A-phase line, the B-phase line or the C-phase line, and the A-phase line, the B-phase line and the B-phase line in each group of circuits The distance between the hanging point a of the C-phase line and the outer wall of the power distribution device building 1 is not equal; the down-conductor 3 of the A-phase line, the down-conductor 4 of the B-phase line and the down-conductor 5 of the C-phase line The minimum distance between them is d2, and d2>the minimum allowable value of the distance between phases.

In this embodiment, by optimizing the position of the three-phase lines, the three-phase lines in each group of circuits are arranged in layers. Specifically, the C-phase line is located directly above the A-phase line, and the B-phase line is located at the C-phase line. Directly above the line, when wiring on the outer wall of the power distribution device building, only the distance between the circuits needs to be reserved in the horizontal direction, and the interphase distance does not need to be reserved. The interphase distance uses the height of the outer wall of the power distribution device building, so it is reduced The horizontal dimension occupied by each circuit on the outer wall of the power distribution device building is reduced, the overall floor area of the power distribution device building is reduced, the land is saved and the cost of the power distribution device building is reduced.

The C-phase line is located directly above the A-phase line, and the B-phase line is located directly above the C-phase line, so that the outlet points on the outer wall of the power distribution device building 1 are arranged on the same line as the iron tower. The wiring points of the A-phase line, B-phase line and C-phase line are arranged in the same direction, that is, they are all arranged vertically, which avoids the three-dimensional crossing of the three-phase lines in the air, and further reduces the probability of phase-to-phase short circuit when the line dances in windy weather.

The GIS outlet rack 2 is arranged below the three-phase wires, and when the three-phase wires are respectively connected to the bushings on the GIS outlet rack 2 through the down-conductors of each phase line, due to the A-phase wires, the B-phase wires and the B-phase wires in each group of loops The distance between the hanging point a of the C phase line and the outer wall of the power distribution device building 1 is not equal, so that the hanging point a of each phase line is staggered along the length direction of the phase line, and the down conductor of each phase line is especially located in the upper part. When the phase wire of the phase line is connected to the bushing on the GIS outlet frame 2 through the down conductor of the phase line, it can be staggered by a certain distance from the phase wire at the lower part and the down conductor of other phase lines, which can be easily realized while reducing the horizontal distance The safe distance between each phase line.

At the same time, the bushings of each phase connected to the phase lines through the down conductors of each phase line are all set on the GIS outlet frame 2 below the three-phase line, and there is no need to install a certain outlet device (sleeve) in order to ensure a safe distance between phases. It is separately installed on the roof of the building, and the outlet bushings are arranged collectively, which makes operation and maintenance convenient; and the GIS outlet frame 2 is a general equipment in the power transmission industry, and does not require additional special outlet devices (casings), and the cost is low.

In this embodiment, the GIS outlet rack 2 is specifically arranged on the outlet balcony 12 outside the power distribution device building 1. The GIS outlet rack 2 is provided with an A-phase outlet bushing 21, a B-phase outlet bushing 22, and a C-phase outlet bushing. 23. The A-phase line down conductor 3 is connected to the A-phase line and the A-phase outlet bushing 21, and the B-phase line down-conductor 4 is connected to the B-phase line and the B-phase outlet bushing 22. The C-phase line down conductor 5 is connected to the C-phase line and the C-phase outlet bushing 23 .

The B-phase line in this embodiment is located above the C-phase line. It should be noted that the A-phase line, B-phase line, and C-phase line mentioned in the present invention are the three-phase lines of the outlet circuit of the power distribution device building. There is no obvious difference between the three in this technical solution, and they are distinguished in the text It is for the convenience of description.

Since the A-phase outlet bushing 21, the B-phase outlet bushing 22 and the C-phase outlet bushing 23 are all arranged on the same GIS outlet frame 2, the B-phase line connecting the B-phase line and the B-phase outlet bushing 22 is led down The length of the line 4 is longer than that of the C-phase line down conductor 5 connecting the C-phase line and the C-phase outlet bushing 23. In order to stabilize the B-phase line down-conductor 4 and reduce the influence of horizontal wind deflection, this Embodiment Preferably, the distance between the hanging point a connected with the C-phase line and the outer wall of the power distribution device building 1 is set to be greater than the distance between the hanging point a connected with the B-phase line and the outer wall of the power distribution device building 1 . Similarly, the distance between the hanging point connected with the A-phase line and the outer wall of the power distribution device building is set to be greater than the distance between the hanging point connected with the C-phase line and the outer wall of the power distribution device building. In this way, without increasing the occupied area, the problem of phase-to-phase insulation of vertically arranged down-conductors is cleverly solved. In addition, a safe distance between phases is achieved without the need to separate the outlet bushings of each phase in different places. Require.

In order to further improve the stability of the down-conductor 4 of the B-phase line and the down-conductor 5 of the C-phase line, the insulating fixture connected to the A-phase line in this embodiment includes a first tension insulator string 61, and In the first extension ring 62 that connects the first tension insulator string 61 end to end, one end of the C-phase line down conductor is connected to the C-phase line, and the other end passes through the first extension ring 62, and Connect with phase C outlet bushing 23. The insulation fixtures connected to the C-phase line all include a second tension insulator string 71, and a second extension ring 72 for connecting the second tension insulator string 71 end-to-end. One end of the phase line down conductor is connected to the B-phase line, and the other end passes through the second extension ring 72 and the first extension ring 62 in turn, and is connected to the B-phase outlet sleeve 22 . In this way, the middle parts of the down conductor 4 of the B-phase line and the down-conductor 5 of the C-phase line are fixed, and the overall arrangement of the down-conductor 4 of the B-phase line and the down-conductor 5 of the C-phase line is more stable, which reduces the impact of the horizontal wind deflection. Impact.

In addition, in this embodiment, the first rod-shaped suspension composite insulator 81 connected to the A-phase line and the second rod-shaped suspension composite insulator connected to the B-phase line are preferably provided on the C-phase line 82. Specifically, the A-phase line down conductor and the first rod-shaped suspension composite insulator 81 are sequentially arranged along the direction of the A-phase line away from its hanging point; the C-phase line down conductor, the first Two rod-shaped suspension composite insulators 82 and the first rod-shaped composite insulator 81 are arranged in sequence along the direction of the C-phase line away from its hanging point; the B-phase line down conductor and the second rod-shaped composite insulator Suspension composite insulators 82 are arranged in sequence along the direction of the B-phase line away from its hanging point.

The first rod-shaped suspension composite insulator 81 and the second rod-shaped suspension composite insulator 82 are light in weight and strong in rigidity, and are installed between vertical two-phase conductors, and the positions of adjacent two-phase conductors are further fixed to further avoid The safety is further improved due to discharge short circuit due to wind deviation and other reasons. Therefore, the distance between the insulating fixtures on the upper floor of the power distribution device can be further compressed, thereby reducing the height requirement for the power distribution device building.

In this embodiment, a support is provided on the top of the power distribution device building 1 , and the insulating fixture of the B-phase line is fixed to the support, and a ground wire 9 is also provided on the support above the B-phase line. Both the insulating fixture connected to the A-phase line and the insulating fixture connected to the C-phase line are fixed to the outer wall of the power distribution device building 1 .

Due to the setting of the first rod-shaped suspension composite insulator 81 and the second rod-shaped suspension composite insulator 82, the external wall of the power distribution device building 1 can also be used under the premise of leaving enough safe space under the A-phase line. Arrange the C-phase line directly above the A-phase line, and only arrange the ground wire 9 and the B-phase line on the bracket, which can reduce the load on the top bracket of the power distribution device building 1. Compared with the existing installation on the top of the power distribution device building 1 In the tower frame, at least two phase lines and ground wires arranged vertically are arranged on the tower frame, and the installation cost is lower.

In order to meet the requirements of the latest national regulations, the compact distribution structure of the power distribution outlets in this embodiment is also integrated with an open-type arrester and an A-phase voltage transformer 101. The arrester specifically includes an A-phase arrester 102 connected to the A-phase line, and a The B-phase arrester 103 connected to the B-phase line, and the C-phase arrester 104 connected to the C-phase line, and the A-phase voltage transformer 101 is connected to the A-phase line.

For the convenience of wiring connection, the A-phase voltage transformer 101 and B-phase arrester 103 are both arranged on the outlet balcony 12, and the A-phase voltage transformer 101 is arranged on the outer wall of the power distribution device building 1 and the Between the A-phase outgoing line bushing 21; the B-phase arrester 103 is arranged between the outer wall of the power distribution device building 1 and the C-phase outgoing line bushing 23, helping to reduce the width of the outgoing line balcony 12.

In order to further reduce the width of the outlet balcony 12 and reduce the overall footprint of the power distribution device building, the A-phase arrester 102 and the C-phase arrester 104 are arranged on a support independent of the outlet balcony 12, and the A-phase voltage mutual inductance The arrester 101, the A-phase outlet bushing 21 and the A-phase arrester 102 are arranged in sequence, and the B-phase arrester 103, the C-phase outlet bushing 23 and the C-phase arrester 104 are arranged in sequence.

In order to increase the safe clear distance between the down conductor 3 of the A-phase line and the down-conductor 5 of the C-phase line, and between the down-conductor 4 of the B-phase line and the down-conductor 5 of the C-phase line, the A-phase outlet bushing 21. The B-phase outlet sleeve 22 and the C-phase outlet sleeve 23 form a planar quincunx structure, that is, the end of the A-phase outlet sleeve 21 connected to the A-phase line downconductor 3, and the One end of the C-phase outlet bushing 23 connected to the C-phase line down-conductor 5 is extended to the side away from the outer wall of the power distribution device building 1, and the A-phase outlet bushing 21 is connected to the A One end connected to the down-conductor 3 of the phase line, and one end connected to the down-conductor 5 of the C-phase line and the C-phase line outlet 5 are away from each other; the B-phase outlet sleeve 22 and the B-phase line lead One end connected to the downline 4 is extended to the side close to the outer wall of the power distribution device building 1 .

The above description is a preferred embodiment of the present invention, and it should be pointed out that for those skilled in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications are also considered Be the protection scope of the present invention.

Claims (6)

1. The utility model provides a distribution compact arrangement structure of being qualified for next round of competitions, its characterized in that includes the distribution equipment building that is used for installing GIS distribution equipment, stretches out to the GIS play line frame outside the distribution equipment building, and locates above the GIS play line frame, by parallel arrangement's A phase line, B phase line and C phase line constitute the return circuit;

the A phase line is connected with the GIS outlet frame through an A phase line down lead, the B phase line is connected with the GIS outlet frame through a B phase line down lead, and the C phase line is connected with the GIS outlet frame through a C phase line down lead; wherein the method comprises the steps of

The C phase line is positioned right above the A phase line, and the B phase line is positioned right above the C phase line;

the minimum distance among the A phase line, the B phase line and the C phase line is d1, and d1 is more than the minimum allowable value of the phase distance;

the minimum distance between the A-phase line down lead, the B-phase line down lead and the C-phase line down lead is d2, and d2 is more than the minimum allowable value of the phase distance;

the power distribution device building is provided with an insulating fixing piece which is correspondingly hung with the A phase line, the B phase line and the C phase line, one end of the insulating fixing piece, which is far away from the power distribution device building, is provided with hanging points, the distances between the hanging points of the A phase line, the B phase line and the C phase line in each group of loops and the power distribution device building outer wall are unequal, the distance between the hanging points of the C phase line connection and the power distribution device building outer wall is greater than the distance between the hanging points of the B phase line connection and the power distribution device building outer wall, the distance between the hanging points of the A phase line connection and the power distribution device building outer wall is greater than the distance between the hanging points of the C phase line connection and the power distribution device building outer wall, and the insulating fixing piece connected with the A phase line and the insulating fixing piece connected with the C phase line are fixed with the power distribution device building outer wall;

the insulation fixing piece which is hung with the phase A line comprises a first tension insulator string and a first extension ring which is used for connecting the first tension insulator string end to end, one end of the phase C line down-lead is connected with the phase C line, and the other end of the phase C line down-lead passes through the first extension ring and is connected with a phase C line sleeve;

the insulating fixing pieces hung on the C-phase line comprise a second tension insulator string and a second extension ring used for connecting the second tension insulator string end to end, one end of the B-phase line down-lead is connected with the B-phase line, and the other end sequentially penetrates through the second extension ring and the first extension ring and is connected with a B-phase line sleeve;

the GIS outlet frame is provided with an A-phase outlet sleeve, a B-phase outlet sleeve and a C-phase outlet sleeve, wherein one end of the A-phase outlet sleeve connected with the A-phase line down lead and one end of the C-phase outlet sleeve connected with the C-phase line down lead are arranged in an extending way towards one side deviating from the outer wall of the power distribution device building, one end of the A-phase outlet sleeve connected with the A-phase line down lead and one end of the C-phase outlet sleeve connected with the C-phase line down lead deviate from each other;

one end of the phase B wire outlet sleeve connected with the phase B wire outlet wire extends to one side close to the outer wall of the power distribution device building;

the lightning arrester also comprises an A-phase lightning arrester connected with the A-phase line through a wire and a C-phase lightning arrester connected with the C-phase line through a wire.

2. The compact distribution outlet arrangement of claim 1, wherein the C-phase line is provided with a first rod-shaped suspended composite insulator connected to the a-phase line and a second rod-shaped suspended composite insulator connected to the B-phase line;

the A phase line down lead and the first rod-shaped suspension composite insulator are sequentially arranged along the direction of the A phase line away from the hanging point of the A phase line;

the C-phase line down-lead, the second rod-shaped suspension type composite insulator and the first rod-shaped suspension type composite insulator are sequentially arranged along the direction of the C-phase line away from the hanging point of the C-phase line;

the phase B line down lead and the second rod-shaped suspension composite insulator are sequentially arranged along the direction that the phase B line is far away from the hanging point.

3. The compact distribution outlet compact arrangement of claim 1, further comprising a B-phase lightning arrester connected to the B-phase line by a wire, the B-phase lightning arrester disposed between an exterior wall of the distribution unit building and the C-phase outlet bushing.

4. A compact distribution outlet compact arrangement as claimed in claim 3, further comprising an a-phase voltage transformer connected to the a-phase line, the a-phase voltage transformer being disposed between the distribution unit building exterior wall and the a-phase outlet sleeve.

5. The distribution outlet compact arrangement structure according to claim 4, wherein an outlet balcony is arranged outside a distribution device building, the GIS outlet rack is arranged on the outlet balcony, the A-phase lightning arrester and the C-phase lightning arrester are arranged on a support independent of the outlet balcony, the A-phase voltage transformer, the A-phase outlet sleeve and the A-phase lightning arrester are sequentially arranged, and the B-phase lightning arrester, the C-phase outlet sleeve and the C-phase lightning arrester are sequentially arranged.

6. The compact distribution outlet compact arrangement of claim 1, further comprising a ground wire disposed above the B-phase wire, wherein a bracket is disposed on top of the distribution unit building, and wherein the ground wire and the B-phase wire are secured to the bracket by insulated fasteners.

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