A high voltage outlet cabinet

Abstract

The present invention discloses a high-voltage outlet cabinet, comprising a cabinet, a partition plate is provided in the cabinet, the partition plate divides the cabinet into a front space and a rear space, three upper contact perforations and three middle contact perforations are provided on the partition plate, two or three lower contact perforations are also provided on the partition plate, and a common wire perforation is also provided on the cabinet side wall of the rear space. When an interphase short circuit occurs in the outlet line, the outlet cabinet can realize that one fault phase is turned on and another fault phase is connected to the earth or a common wire in a screen cabinet environment, thereby creating conditions for handling the interphase short circuit.

Description

Technical Field

[0001] The invention relates to a device, in particular to a high-voltage outlet cabinet. Background Art

[0002] In the field of high-voltage power distribution, a panel cabinet is required for safe operation. The high-voltage line enters through the incoming cabinet, is connected to the busbar through the circuit breaker, and then the busbar passes through the incoming cabinet and runs through several outgoing cabinets arranged side by side. Outgoing cables are drawn out from each outgoing cabinet for use by different power units. The outgoing cables are connected to the busbar through the circuit breaker in the outgoing cabinet. Invention patent applications 2020114536325 and 2020114536310 provide methods for handling phase-to-phase short-circuit faults, but the current outgoing panel cabinets are difficult to cooperate with the above methods and need to be modified. Summary of the invention

[0003] The purpose of the present invention is to provide a high-voltage distribution cabinet, which can realize the conduction of one faulty phase and the connection of another faulty phase to the ground or a common wire in a panel cabinet environment when an interphase short circuit occurs in the distribution line, thereby creating conditions for handling the interphase short circuit.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A high-voltage outlet cabinet comprises a cabinet body, wherein a partition plate is arranged in the cabinet body, wherein the partition plate divides the cabinet body into a front space and a rear space, wherein three upper contact perforations and three middle contact perforations are arranged on the partition plate, two or three lower contact perforations are also arranged on the partition plate, and a common wire perforation is also arranged on the cabinet side wall in the rear space.

[0006] Preferably, the front space is divided into a switch room and a secondary instrument room, and the upper contact perforation, the middle contact perforation and the lower contact perforation on the partition plate are all connected to the switch room and the rear space.

[0007] Preferably, a switch is provided in the switch chamber, the switch comprises a two-phase independent single-pole double-throw switch and a one-phase third switch, the single-pole double-throw switch comprises a first static contact, a second static contact and a compound moving contact, the first static contact is connected to the incoming line through the upper contact perforation, the second static contact is connected to the common wire inserted through the common wire perforation through the lower contact perforation, and the compound moving contact is connected to the outgoing line through the middle contact perforation; the third switch comprises a third static contact and a third moving contact, the third static contact is connected to the incoming line through the upper contact perforation, and the third moving contact is connected to the outgoing line through the middle contact perforation.

[0008] Preferably, a switch is provided in the switch chamber, the switch comprises a three-phase independent single-pole double-throw switch, the single-pole double-throw switch comprises a first static contact, a second static contact and a compound moving contact, the first static contact is connected to the incoming line through the upper contact perforation, the second static contact is connected to the common wire inserted through the common wire perforation through the lower contact perforation, and the compound moving contact is connected to the outgoing line through the middle contact perforation.

[0009] Preferably, the common wire through-hole is arranged on the left side wall and / or the right side wall of the cabinet in the rear space.

[0010] Preferably, a track is provided in the switch room, a trolley is provided on the track, and the switch is arranged on the trolley.

[0011] In the present invention, compared with the previous outlet cabinet, two or three lower contact perforations are provided on the partition plate, so that at least two single-pole double-throw switches can be provided in the switch room, and the switch has two static contacts on the upper and lower sides, and a moving contact in the middle. After the moving contact is separated from the static contact above, it contacts the static contact below (the specific structure can be seen in utility model patent 202120966128.9). In this way, when a phase-to-phase short circuit fault occurs, a certain fault phase can be maintained on, and the other fault phase can be connected to the common wire while being tripped, and then cooperate with the closing of other switches to make a certain energized phase also connected to the common wire, so that a closed loop including the fault phase and another fault phase that maintains conduction, a power supply and a common wire can be formed through the phase-to-phase short circuit point, and a pulse current or a continuous current is generated, so that the controlled switch that can detect the current pulse or current duration on the line trips to eliminate the fault. Therefore, the present invention is an ideal screen cabinet with high safety and simple structure in a screen cabinet environment, which cooperates with a switch to maintain a fault phase on, trip another fault phase and connect it to a common wire or ground. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is the front view of the present invention;

[0013] Figure 2 This is a left view of the cabinet structure of the present invention;

[0014] Figure 3 for Figure 2 Partial cross-sectional view along AA direction. DETAILED DESCRIPTION

[0015] The present invention will be further described below in conjunction with the accompanying drawings.

[0016] like Figure 1 , Figure 2 and Figure 3As shown, the high-voltage outlet cabinet includes a cabinet body 1, and the cabinet body 1 includes a left side wall 101, a right side wall 102, a rear side wall 105 and a front cabinet door 106. A partition plate 107 is provided in the cabinet body 1, and the partition plate 107 divides the cabinet body 1 into a front space 2 and a rear space 3. An incoming line through hole 4 is provided on the cabinet side wall of the rear space 3. In one embodiment, there are three incoming line through holes 4 for inserting three-phase incoming lines (i.e., three-phase busbars), and they are respectively arranged on the left side wall 101 and the right side wall 102 of the cabinet body 1. Such an outlet cabinet can be penetrated by the incoming line (i.e., penetrated from one side and passed out from the other side). In another embodiment, only one of the left side wall 101 or the right side wall 102 is provided with an incoming line through hole 4. Such a cabinet is suitable for use as a terminal outlet panel cabinet, and only the incoming line is inserted, and it is not necessary to pass the incoming line out. In the above embodiment, the outgoing line 12 is inserted from the bottom of the cabinet body from the outside and connected to the incoming line (i.e., busbar) through a switch.

[0017] The partition plate 107 is provided with three upper contact through-holes 6, three middle contact through-holes 7, and two lower contact through-holes 8. A common wire through-hole 9 is also provided on the side wall of the cabinet of the rear space 3. In one embodiment, the front space 2 is divided into a switch room 201 and a secondary instrument room 202, and the secondary instrument room 202 is placed in the secondary instrument room. The upper contact through-hole 6, the middle contact through-hole 7, and the lower contact through-hole 8 on the partition plate 107 are all connected to the switch room 201 and the rear space 3. In one embodiment, a track 203 is provided in the switch room 201, a trolley 204 is provided on the track 203, and a switch 11 is provided on the trolley 204. The switch 11 includes a two-phase independent single-pole double-throw switch and a one-phase third switch. The single-pole double-throw switch includes a first static contact 1103, a second static contact 1104 and a composite moving contact 1105. The first static contact 1103 is connected to the incoming line 10 inserted through the incoming line through the upper contact through hole 6, and the second static contact 1104 is connected to the common wire 13 inserted through the common wire through the lower contact through hole 8. The composite moving contact 1105 is connected to the outgoing line 12 through the middle contact through hole 7. The third switch includes a third static contact and a third moving contact. The third static contact is connected to the incoming line 10 through the upper contact through hole 6, and the third moving contact is connected to the outgoing line 12 through the middle contact through hole 7. In another embodiment, there are three lower contact holes 8, so that three single-pole double-throw switches can be set, and the first static contact is connected to the incoming line through the upper contact hole, the second static contact is connected to the common wire through the lower contact hole, and the composite moving contact is connected to the outgoing line through the middle contact hole. In the above two switch configuration embodiments, the function of maintaining one fault phase conductive and grounding the other fault phase can be achieved.

[0018] In the above embodiment, if the incoming wire perforations 4 are respectively arranged on the left and right walls of the cabinet, the common wire perforations 9 are also arranged on the left and right walls, and such a cabinet is used as an intermediate cabinet, through which the incoming wires and the common wires can pass. If the incoming wire perforations are arranged only on the left or right walls, the common wire perforations are also arranged only on the left or right walls, and such a cabinet is only used as an end screen cabinet.

[0019] The above embodiments are only some illustrations of the concept and implementation of the present invention, and are not intended to limit the same. Under the concept of the present invention, technical solutions that have not been substantially changed are still within the scope of protection.

Claims

1. A high-voltage outlet cabinet, comprising a cabinet body, wherein a partition plate is provided in the cabinet body, wherein the partition plate divides the cabinet body into a front space and a rear space, wherein three upper contact through holes and three middle contact through holes are provided on the partition plate, wherein: Two or three lower contact holes are also provided on the partition plate, and a common wire hole is also provided on the cabinet side wall of the rear space; The front space is divided into a switch room and a secondary instrument room, and the upper contact through-hole, the middle contact through-hole and the lower contact through-hole on the partition plate are all connected to the switch room and the rear space; A switch is provided in the switch chamber, the switch comprising a two-phase independent single-pole double-throw switch and a one-phase third switch, the single-pole double-throw switch comprising a first static contact, a second static contact and a composite moving contact, the first static contact being connected to the incoming line via the upper contact perforation, the second static contact being connected to the common wire inserted through the common wire perforation via the lower contact perforation, the composite moving contact being connected to the outgoing line via the middle contact perforation; the third switch comprising a third static contact and a third moving contact, the first The three static contacts are connected to the incoming line through the upper contact perforation, and the third moving contact is connected to the outgoing line through the middle contact perforation; or the switch includes a three-phase independent single-pole double-throw switch, and the single-pole double-throw switch includes a first static contact, a second static contact and a composite moving contact, the first static contact is connected to the incoming line through the upper contact perforation, the second static contact is connected to the common wire inserted through the common wire perforation through the lower contact perforation, and the composite moving contact is connected to the outgoing line through the middle contact perforation; The common wire through hole is arranged on the left side wall and / or the right side wall of the cabinet in the rear space.

2. The high voltage outlet cabinet according to claim 1, characterized in that: A track is arranged in the switch room, a trolley is arranged on the track, and the switch is arranged on the trolley.

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