CN206506160U - Compact busbar connection cabinet - Google Patents

Abstract

The utility model provides a kind of compact bus contact cabinet, including breaker chamber (32), left busbar room (31) and right busbar room (33)；Left busbar room (31) and right busbar room (33) are symmetrically distributed in the top of breaker chamber (32), and breaker chamber (32) is shared, left busbar room (31), right busbar room (33) and breaker chamber (32) are arranged in the arrangement of falling triangle disposition.Left busbar socket (312) is all installed in the left side of left busbar room housing (311), and the right side of left busbar room housing is without bus socket.The right-hand member of left busbar keeps insulation distance with the right side of left busbar room housing and isolates static contact as left three-station (314).Compact bus contact cabinet of the present utility model realizes left busbar and the contact or segmentation of right busbar and enhanced feature on a switch cubicle, saves busbar, bus casing, reduces the depth dimensions of switch cubicle, saves transformer station's floor space.

Description

Compact busbar connection cabinet

technical field

The utility model relates to the field of electrical technology, in particular to the technical field of high-voltage switchgear, in particular to a bus connection cabinet.

Background technique

In high-voltage switchgear, the bus connection cabinet is a device used to connect or segment two sections of bus. Usually, the busbar is on the top of the switchgear, and the busbar connection cabinet first leads the first section of busbar from the top to the bottom to connect or segment the busbar, and then lifts the busbar to the top of the switchgear to connect with the second section of busbar.

As shown in Fig. 1, it is a schematic diagram of an existing busbar connection cabinet, and the busbar rooms are arranged left and right. The bus connection cabinet is composed of two switch cabinets, the section circuit breaker cabinet 11 and the lifting cabinet 12. The busbar of the section circuit breaker cabinet 11 connects or sections the first section of the busbar through the section circuit breaker 1121 and separates the first section of the busbar. Lead from the top of the switch cabinet to the bottom of the switch cabinet; the bus bar of the lifting cabinet 12 first passes through the current transformer 1221 and then leads from the bottom to the top of the switch cabinet, realizing the bus lifting function.

The disadvantage of the bus tie cabinet shown in Figure 1 is that it is composed of two switch cabinets, including four air chambers, the left bus room 121, the left circuit breaker 122, the right bus room 111, and the right circuit breaker 112. The land area is large.

As shown in Fig. 2 is another kind of existing busbar connection cabinet structure schematic diagram, its busbar room is distributed front and back, this busbar connection cabinet is made up of front busbar room 21, circuit breaker room 22, rear busbar room 23; Sectional circuit breaker 221 connects or divides the busbars of the first section and leads the first section of busbars to the rear and lower part of the switchgear; and then leads the busbars from the rear bottom to the rear top of the switchgear through the current transformer 222, realizing the lifting of the busbars Function. The two sections of busbars on both sides of the busbar connection cabinet are distributed front and back, and one switchgear realizes the functions of busbar connection or segmentation and busbar lifting.

However, the bus connection cabinet shown in Figure 2 requires that the two bus rooms of the switch cabinet spliced with it be arranged in front and one behind. In addition, there must be switch cabinets in the rear busbar room. The cost of the entire row of switch cabinets is high and the floor space is large.

Utility model content

Aiming at the main problems existing in the above-mentioned existing busbar connecting cabinet, the utility model provides a compact busbar connecting cabinet, including a circuit breaker room, a left busbar room and a right busbar room; the left busbar room and the right busbar room are symmetrically distributed in the circuit breaker The top of the room, and share the circuit breaker room, the left bus room, the right bus room and the circuit breaker room are arranged in an inverted "pin" shape. Here, "left" and "right" are just for convenience of description, and "front", "middle" and "rear" below are all the same, and neither constitutes a limitation on the scope of protection.

According to a preferred embodiment of the present invention, the left busbar compartment includes a left busbar compartment housing, a left busbar socket, a left busbar, a left three-position switch, and a left wall-through bushing.

According to a preferred embodiment of the present invention, the right busbar chamber includes a right busbar chamber housing, a right busbar socket, a right busbar, a right three-position switch, and a right wall-through bushing.

According to a preferred embodiment of the utility model, the left busbar sockets are all installed on the left side of the left busbar chamber housing, and there is no busbar socket on the right side of the left busbar chamber housing.

According to a preferred embodiment of the utility model, the right end of the left busbar maintains an insulating distance from the right side of the left busbar compartment housing and serves as the isolated static contact of the left three-position switch.

According to a preferred embodiment of the present utility model, copper tubes are respectively used between the three-phase right busbar chamber wall bushings arranged in front, middle and rear order and the three-phase circuit breaker poles arranged in left, middle and right order connect.

According to a preferred embodiment of the utility model, the connection between the circuit breaker and the current transformer, and the connection between the current transformer and the bushing through the wall, are all in the form of direct connection of copper pipes. The direct connection mentioned here means to use a copper pipe to connect, not to say that the copper pipe is straight.

According to a preferred embodiment of the utility model, the three-phase current transformers are arranged and installed at the bottom of the circuit breaker housing according to the front left, middle middle and rear right positions.

According to a preferred embodiment of the present utility model, the right terminal of the three-phase current transformer is respectively aligned with the lower terminal of the pole of the three-phase circuit breaker in the left and right directions; The directions are respectively aligned with the busbar bushings in the three-phase left busbar chamber.

The compact bus connection cabinet of the utility model realizes the connection or segmentation function of the left bus and the right bus on one switch cabinet, saves bus bars and bus bushings, reduces the depth dimension of the switch cabinet, and saves the occupied area of the substation. land area.

Description of drawings

Fig. 1 is a schematic diagram of an existing busbar connecting cabinet distributed on the left and right of the busbar room;

Fig. 2 is a schematic diagram of another existing busbar connecting cabinet distributed in front and rear of the busbar room;

Fig. 3 is a schematic structural view of the compact bus connection cabinet of the present invention;

Fig. 4 is a schematic diagram of the main circuit structure of the compact bus connection cabinet of the present invention.

detailed description

The structure and functions of the compact busbar connection cabinet of the present utility model will be described in detail below in conjunction with the accompanying drawings.

Figure 3 is a schematic structural view of the utility model compact bus connection cabinet, which consists of two bus chambers 31, 33 and a circuit breaker chamber 32. According to the layout positions in the figure, for the convenience of description, the two busbar rooms are called left busbar room 31 and right busbar room 33 respectively.

The "left, right, front, middle, and rear" in this specification and the previous claims are only for convenience of description, and they all refer to the relative orientation viewed from the front of the switch cabinet to the rear of the cabinet, and do not constitute the scope of protection of this application. "Left and right" can also be described in the first and second ways; "front, middle and rear" can also be described in the first position, second position and third position.

The left busbar chamber 31 and the right busbar chamber 33 are symmetrically distributed on the top of the circuit breaker chamber 32 and share the same circuit breaker chamber 32. The three air chambers are arranged in an inverted "pin" shape.

As shown in FIG. 3 , the left busbar compartment 31 is composed of a left busbar compartment housing 311 , a left busbar socket 312 , a left busbar 313 , a left three-position switch 314 , and a left wall-through bushing 315 . A, B, and C three-phase three busbar sockets 312 are installed on the left side of the left busbar chamber housing 311 in the order of front, middle and rear, and there is no busbar socket on the right side of the left busbar chamber housing 311. With this structure arrangement, all the busbar sockets are located on the left side of the left busbar chamber housing 311, and there is no busbar socket on the right side, which makes the structure more compact and saves space.

According to a preferred embodiment of the present utility model, as shown in the figure, the left end of the left busbar 313 is fixedly installed on the left busbar socket 312, and the right end of the left busbar 313 is properly kept with the right side of the left busbar chamber housing 311. The insulation distance is used as the isolated static contact of the left three-position switch 314. The proper insulation, for example, requires an insulation distance of 70-80 mm in the case of passing a lightning strike of 185 kV. When the left three-position switch 314 is in the isolation closing position, the knife brake movable contact 3141 directly clamps the left busbar 313, and no auxiliary isolation static contact is needed.

The A, B, C three-phase left bus socket 312, left bus bar 313, left three-position switch 314, and left wall-through bushing 315 of the left bus room 31 are arranged and connected sequentially according to the front, middle, and rear sequences.

As shown in Figure 3, the right busbar chamber 33 is symmetrically arranged with the left busbar chamber 31, including a right busbar chamber housing 331, a right busbar socket 332, a right busbar 333, a right three-position switch 334, and a wall bushing 335 and other components.

The circuit breaker chamber 32 is composed of a circuit breaker housing 321 , an upper copper tube 322 of the circuit breaker, a circuit breaker 323 , a lower copper tube 324 of the circuit breaker, a current transformer 325 , and a copper tube 326 on the left side of the current transformer.

As shown in FIG. 3 , the wall-piercing bushing 335 of the right bus chamber is connected with the circuit breaker 323 , the circuit breaker 323 and the current transformer 325 , and the current transformer 325 is connected with the left wall-piercing bushing 315 of the left bus chamber.

In order to facilitate the description of the connection relationship between the internal main circuit components of the bus connection cabinet shown in Figure 3, after the bus room housing and the circuit breaker room housing are hidden, Figure 4 highlights the compact bus connection cabinet of the present invention main loop structure;

As shown in Figure 4, according to a preferred embodiment of the present utility model, the A-phase wall bushing 3351, the B-phase wall bushing 3352, and the C-phase wall bushing 3353 of the right bus room are respectively connected to the circuit breaker A phase. The rear terminal of column 3231, the rear terminal of phase B pole 3232, and the rear terminal of phase C pole 3233 are connected together through the upper copper tube 3221 of the phase A circuit breaker, the upper copper tube 3222 of the B phase circuit breaker, and the upper copper tube 3223 of the C phase circuit breaker . A, B, and C three-phase right busbar room wall bushings arranged in the order of front, middle, and rear are connected with two pairs of A, B, and C three-phase circuit breaker poles arranged in the order of left, middle, and right, using copper pipes . If the existing copper bar connection method is used, because the space from the front, middle, and rear order to the left, middle, and right order is staggered, the copper bar needs to be divided into two sections for connection, or a more complicated connection form. According to the best embodiment of the utility model, the copper pipe can be directly connected with one piece, which avoids the segmental connection of the copper bars.

Similarly, according to a preferred embodiment of the present invention, the connection between the circuit breaker and the current transformer, as well as the connection between the current transformer and the wall bushing, are all directly connected by copper tubes, avoiding the use of copper busbars. Segment joins or more complex joins. The direct connection mentioned here means that a copper pipe is used to connect, not that the copper pipe is straight.

As shown in FIG. 3 , the three-phase current transformers 325 of A, B, and C are arranged and installed on the bottom of the circuit breaker housing 321 according to the front left, middle middle, and rear right positions. This structural layout makes the lower copper pipe 324 of the circuit breaker and the left copper pipe 326 of the current transformer less bent, and the structure is simpler.

As shown in Figure 4, according to a preferred embodiment of the present utility model, the right side terminal of A, B, C three-phase current transformer 325 is connected with A, B, C three-phase circuit breaker pole bottom terminal respectively in the left and right directions. Align accordingly. The right terminal of the A-phase current transformer 3251, the right terminal of the B-phase current transformer 3252, and the right terminal of the C-phase current transformer 3253 are respectively connected to the lower terminal of the circuit breaker A-phase pole 3231 and the lower terminal of the B-phase pole 3232. The terminal and the lower terminal of the C-phase pole 3233 are connected together through the lower copper tube 3241 of the A-phase circuit breaker, the lower copper tube 3242 of the B-phase circuit breaker, and the lower copper tube 3243 of the C-phase circuit breaker.

The left connection terminals of the A, B, and C three-phase current transformers 325 are respectively aligned with the bus bushings 315 of the A, B, and C three-phase left bus chambers in the front and rear directions. The left terminal of the A-phase current transformer 3251, the left terminal of the B-phase current transformer 3252, and the left terminal of the C-phase current transformer 3253 are respectively connected to the left wall bushing 3151 of the left busbar room A and the left side of the left busbar room B. The wall bushing 3152 and the left wall bushing 3153 of phase C in the left busbar chamber pass through the left copper pipe 3261 of the A-phase current transformer, the left copper pipe 3262 of the B-phase current transformer, and the left copper pipe 3263 of the C-phase current transformer. Connect up and down.

As shown in Figure 3, the working principle of the compact busbar connection cabinet is: the busbar 333 in the right busbar room, the right three-position switch 334, the isolation sleeve 335, the copper tube 322 on the circuit breaker, and the circuit breaker 323 constitute the busbar connection or Segmented function, leading the bus bar from the top of the switch cabinet to the bottom of the switch cabinet; copper tube 324 under the circuit breaker, current transformer 325, copper tube 326 on the left side of the current transformer, isolation bushing 315, left three-position switch 314, The busbar 313 in the left busbar compartment constitutes the busbar lifting function, which lifts the busbar from the bottom of the switchgear to the top of the switchgear.

The operation sequence of the compact busbar connection cabinet is: when carrying out the busbar connection operation, first isolate and close the right three-position switch 334 and the left three-position switch 314, and then close the circuit breaker to realize the busbar cover in the left busbar room. The busbar on the left side of the tube 312 is in contact with the busbar on the right side of the busbar bushing 332 in the right busbar room; when performing bus section operation, the circuit breaker is first opened, and then the right three-position switch 334 and the left three-position switch 314 are isolated and opened. The gate realizes the segmentation of the busbar 333 in the left busbar compartment and the busbar 313 in the right busbar compartment.

As shown in Figure 3, the advantages of the utility model compact bus connection cabinet are:

1) The two busbar rooms are arranged on the left and right and share a circuit breaker room. One switchgear can realize the connection or segmentation and lifting functions of the left busbar and the right busbar;

2) The left busbar, right busbar and the right side housing maintain an appropriate insulation distance, instead of running through the entire busbar room from left to right, which saves busbars and busbar bushings and makes the busbar room compact;

3) The left and right busbar rooms are located at the front of the switchgear. In the entire substation, the busbar rooms of the entire row of switchgears are arranged at the front of the switchgear, which reduces the depth of the switchgear and saves the area occupied by the substation.

Although the preferred embodiment of the utility model and accompanying drawings are disclosed for the purpose of illustration, those skilled in the art can make various replacements, Variations and retouching. Therefore, the utility model should not be limited to the content disclosed in the preferred embodiments and drawings, and the scope of protection of the utility model should be defined by the appended claims.

Claims (9)

1. A compact busbar connection cabinet, comprising a circuit breaker compartment (32), is characterized in that: also comprises left busbar compartment (31) and right busbar compartment (33); Left busbar compartment (31) and right busbar compartment (33) ) are symmetrically distributed on the top of the circuit breaker room (32), and share the circuit breaker room (32), the left bus room (31), the right bus room (33) and the circuit breaker room (32) are arranged in an inverted "pin" shape . 2. The compact busbar connection cabinet according to claim 1, characterized in that: the left busbar compartment (31) comprises a left busbar compartment housing (311), a left busbar socket (312), a left busbar (313), a left Three-position switch (314), left through the wall bushing (315). 3. The compact busbar connection cabinet according to claim 1, characterized in that: the right busbar compartment (33) comprises a right busbar compartment housing (331), a right busbar socket (332), a right busbar (333), a right Three-position switch (334), right through wall bushing (335). 4. The compact busbar connection cabinet according to claim 2, characterized in that: the left busbar sockets (312) are all installed on the left side of the left busbar compartment housing (311), and on the right side of the left busbar compartment housing (311). There is no busbar socket on the side. 5. The compact busbar connection cabinet according to claim 4, characterized in that: the right end of the left busbar (313) maintains an insulating distance from the right side of the left busbar chamber housing (311) and acts as a left three-position switch ( 314) isolated static contacts. 6. The compact busbar connection cabinet according to any one of claims 1-5, characterized in that: the three-phase right busbar chamber wall bushings arranged in the order of front, middle and rear are arranged in the order of left, middle and right The poles of the three-phase circuit breaker are connected by copper pipes. 7. The compact busbar connection cabinet according to claim 6, characterized in that: the connection between the circuit breaker and the current transformer, and the connection between the current transformer and the wall bushing are all in the form of direct connection of copper pipes. 8. The compact bus tie cabinet according to claim 6, characterized in that: the three-phase current transformers (325) are arranged and installed at the bottom of the circuit breaker housing (321) according to front left, middle middle and rear right positions. 9. The compact busbar connection cabinet according to claim 8, characterized in that: the right terminals of the three-phase current transformer (325) are respectively aligned with the lower terminals of the poles of the three-phase circuit breaker in the left and right directions; The left connection terminals of the phase current transformers (325) are respectively aligned with the bus bushings (315) of the three-phase left bus chamber in the front and rear directions.