Inter-pole protection structure for panel busbars

Abstract

Ensure that short circuits between busbars are less likely to occur. [Solution] The panel comprises a power distribution device 3, a plurality of busbars 2 connected to the power distribution device, and a first insulating wall 4 which at least a portion of which is interposed between the busbars, and the panel busbars are protected between poles in a busbar configuration in which the first insulating wall is located on the rear side of the power distribution device. Additionally, the busbars may be sandwiched between bar holders, and the bar holders that sandwich the busbars may be provided with a first insulating wall insertion portion into which the first insulating wall is inserted. Furthermore, a configuration may be added in which a second insulating wall 7 which at least a portion of which is interposed between the busbars is provided on a protective plate 81 which is attached so as to cover a portion of the busbars.

Description

Technical Field

[0001] The present invention relates to an inter-pole protection structure for a bus bar for a panel.

Background Art

[0002] As described in Patent Document 1, there is known a panel in which bus bars are arranged in parallel inside. The parallel bus bars are arranged at intervals so that a short circuit does not occur.

Prior Art Document

Patent Document

[0003]

Patent Document 1

[0004] By using the panel, a conductive needle-like structure called a whisker may be generated on the bus bar. The whisker is generated from the surface of the metal plating and is caused by the recrystallization of the plating. If this whisker grows between the bus bars, a short circuit may occur along the whisker. For this reason, it is conceivable to visually inspect the bus bar, but it was difficult to see the hidden parts of the power distribution equipment.

Summary of the Invention

Problems to be Solved by the Invention

[0005] The inventor of the present case has tried to solve this problem by earnestly studying this point. The problem to be solved by the present invention is to make it difficult for a short circuit to occur between the bus bars.

Means for Solving the Problems

[0006] To solve the above problems, a panel is provided with a power distribution device, a plurality of bus bars connected to the power distribution device, and a first insulating wall at least partially intervening between the bus bars, and an inter-pole protection structure for a bus bar for a panel in which the first insulating wall is located on the rear side of the power distribution device.

[0007] Furthermore, it is preferable that the busbar is sandwiched between bar holders, and that the bar holders that sandwich the busbar are provided with a first insulating wall insertion portion into which the first insulating wall is inserted.

[0008] Furthermore, it is preferable that the busbar and the first insulating wall extend in the vertical direction, and that the first insulating wall is provided with a contact portion that can abut against the upper surface of at least one bar holder.

[0009] Furthermore, it is preferable to have a configuration in which a second insulating wall, at least a portion of which is interposed between the busbars, is provided on a protective plate that is attached so as to cover a portion of the busbars.

[0010] Furthermore, it is preferable that the first insulating wall extends further back than the second insulating wall, while the second insulating wall extends further forward than the first insulating wall, and that the first and second insulating walls partially overlap when viewed in the direction of the busbar arrangement. [Effects of the Invention]

[0011] This invention makes it possible to prevent short circuits from occurring between busbars. [Brief explanation of the drawing]

[0012] [Figure 1] This is a perspective view of the control panel in the embodiment, with the enclosure door in the open position. [Figure 2] This is a perspective view showing an example of a structure in which busbars and a first insulating wall are arranged between mounting rails. [Figure 3] This is a cross-sectional view of the right half of the structure shown in Figure 2. [Figure 4] This figure shows an example where one of the bar holders has been removed. [Figure 5] This figure shows an example where the first insulating wall is in contact with the top surface of one bar holder. [Figure 6] This figure shows an example in which a component used as a second insulating wall is fixed to a protective plate. [Figure 7]This figure shows an example of a protective plate with a second insulating wall being attached to a mounting rail. However, it is cut to span across the mounting rails. [Figure 8] This figure shows an example of the state shown in Figure 7, viewed along the longitudinal direction of the busbar. [Figure 9] This figure shows an example of the state shown in Figure 7, viewed from a diagonal rearward angle. [Modes for carrying out the invention]

[0013] The following describes embodiments for carrying out the invention. The inter-pole protection structure for a panel busbar in this embodiment comprises a power distribution device 3, a plurality of busbars 2 connected to the power distribution device 3, and a first insulating wall 4 interposed between the busbars 2, at least a portion of which is located in the panel 5, with the first insulating wall 4 located behind the power distribution device 3. This makes it possible to prevent short circuits between the busbars 2.

[0014] As can be seen from Figure 1, the panel 5 of the embodiment comprises a housing 51 which includes a housing body 52 and a door 53 capable of covering the opening of the housing body 52. ​​Busbars 2, which serve as electrical paths, are arranged in the housing body 52, and the busbars 2 are arranged parallel to adjacent busbars 2. Between the parallel busbars 2, a first insulating wall 4 is arranged parallel to the longitudinal direction of the busbars 2 (see Figure 2). The front-rear direction is perpendicular to both the longitudinal direction of the busbars 2 and the direction in which the busbars 2 are arranged. Of the front-rear ends of the busbars 2, the end facing the power distribution equipment 3 is the front end, and the end facing the housing body 52 is the rear end.

[0015] In the example shown in Figure 3, the first insulating wall 4 is positioned so that it is approximately equal in distance from the two adjacent busbars 2. In the example shown in Figure 3, the first insulating wall 4 is positioned between adjacent busbars 2, with three busbars 2 spaced evenly apart. As a result, the busbars are arranged in the order of busbar 2, first insulating wall 4, busbar 2, first insulating wall 4, busbar 2, all at equal intervals.

[0016] In the example shown in FIGS. 2 and 3, the bus bar 2 and the first insulating wall 4 are arranged in parallel between the mounting rails 54. The positions of the bus bar 2 and the first insulating wall 4 located between the bar holders 6 are determined so as to appropriately maintain the distance between them. In the example shown in FIG. 3, one bar holder 6 is fixed to the bar holder fixing member 55, and the other bar holder 6 is fixed to the mounting rail 54, but it is not necessary to be limited to such a mode.

[0017] In the example shown in FIG. 2, three bar holders 6 are arranged at intervals in the longitudinal direction of the first insulating wall 4, and the first insulating wall 4 is sandwiched by the bar holders 6 at three locations at intervals in its longitudinal direction. The number of locations where the first insulating wall 4 is sandwiched by the bar holders 6 may be any number, but the first insulating wall 4 is preferably configured to be sandwiched by the bar holders 6 at a plurality of locations. In this way, it is possible to suppress the first insulating wall 4 from tilting or the like.

[0018] Also, the number of locations where the first insulating wall 4 is sandwiched by the bar holders 6 is preferably the same as the number of locations where the bus bar 2 adjacent to the first insulating wall 4 is sandwiched by the bar holders 6. With such a configuration, the bar holders 6 can be effectively utilized.

[0019] In the example shown in FIG. 3, the bus bar 2 is fixed to one bar holder 6 using a male screw 56, but no fixing member such as a male screw is used for the other bar holder 6. The bus bar 2 can be sandwiched between one bar holder 6 and the other bar holder 6 so that a part of the bus bar 2 is inserted into the bar insertion portion 62 provided in the other bar holder 6. However, it is not essential to use a fixing member such as a male screw 56 for one bar holder 6 either. The bus bar 2 may simply be sandwiched between one bar holder 6 and the other bar holder 6 to suppress the movement of the bus bar 2.

[0020] On the other hand, in the example shown in Figure 3, the first insulating wall 4 is not fixed using a fixing member, but is simply held in place by inserting the busbar 2 into the first insulating wall insertion portions 61 provided on both bar holders 6, thereby preventing movement. Therefore, no tools are required when installing the first insulating wall 4. Furthermore, due to this configuration, the first insulating wall 4 can be removed from the bar holder 6 on the other side by moving the bar holder 6 located on one side of the first insulating wall 4 (see Figure 4).

[0021] As can be understood from these descriptions, the inter-pole protection structure for a panel busbar is such that the busbar 2 is sandwiched between bar holders 6, and it is preferable that the bar holder 6 that sandwiches the busbar 2 is provided with a first insulating wall insertion portion 61 into which the first insulating wall 4 is inserted.

[0022] By the way, if the longitudinal direction of the busbar 2 is vertical, and the first insulating wall 4 is sandwiched between the bar holder 6, there is a possibility that the first insulating wall 4 may slide downward due to its own weight. Even in such a case, if the first insulating wall 4 can be supported by the upper surface of the bar holder 6, it is possible to prevent the first insulating wall 4 from sliding down below that point (see Figure 5). Of course, if the first insulating wall 4 is supported by the upper surface of the bar holder 6 and the first insulating wall 4 is sandwiched between the bar holder 6, the first insulating wall 4 will not slide downward.

[0023] Therefore, when the busbar 2 and the first insulating wall 4 extend in the vertical direction, it is preferable that the inter-pole protection structure of the panel busbar be configured such that the first insulating wall 4 has a contact portion 41 that can contact the upper surface of at least one bar holder 6.

[0024] In this embodiment, the first insulating wall 4 is made of resin. Furthermore, although the first insulating wall 4 in this embodiment is a plate-like structure with a thickness thinner than the busbar 2, it may also be configured to be thicker than the busbar 2.

[0025] Incidentally, in addition to the first insulating wall 4, a second insulating wall 7 may be configured to be located between the busbars 2. The second insulating wall 7 may be positioned at a distance from the first insulating wall 4, or it may be positioned in contact with the first insulating wall 4.

[0026] The first insulating wall 4 extends parallel to the busbar 2, but considering that power distribution equipment 3 and the like are connected to the busbar 2, it may be better not to make the first insulating wall 4 cover the entire width (front-to-back width) of the busbar 2. For example, in order to avoid interfering with the placement of equipment connected to the busbar 2, it may be better to have the end of the busbar 2 on the side to which the power distribution equipment 3 and the like are connected (the front end) protrude more than the first insulating wall 4.

[0027] Even in this case, it is possible to make it difficult for short circuits to occur between the busbars 2, but it is preferable to configure the busbars 2 so that insulating walls are interposed between the ends (front ends) on the side to which the power distribution equipment 3 etc. is connected. For this reason, it is preferable to place a second insulating wall 7, which is provided separately from the first insulating wall 4, between the ends (front ends) of the busbars 2 on the side to which the power distribution equipment 3 etc. is connected.

[0028] On the other hand, the busbar 2 is designed to allow for the connection of multiple power distribution devices 3 arranged in the longitudinal direction, but the maximum number of power distribution devices 3 are often not connected. For this reason, protective plates 81 are installed in areas where power distribution devices 3 are not placed to prevent users from coming into contact with the busbar 2.

[0029] It is preferable to attach the second insulating wall 7 to the protective plate 81 used in this manner (see Figure 6). In other words, it is preferable to have a configuration in which the second insulating wall 7, which at least a portion of which is interposed between the busbars 2, is provided on the protective plate 81 that is attached so as to cover a portion of the busbars 2 (see Figures 6 to 8).

[0030] The components attached to the protective plate 81 may have only one second insulating wall 7 per component, but it is preferable to have multiple second insulating walls 7 per component. In the example shown in Figure 6, two second insulating walls 7 are provided per component.

[0031] Furthermore, in the examples shown in Figures 7 to 9, three busbars 2 are arranged between the mounting rails 54, but by attaching one component to the protective plate 81, a second insulating wall 7 is positioned between each of the busbars 2.

[0032] Incidentally, it is preferable that the first insulating wall 4 and the second insulating wall 7 partially overlap when viewed in the direction of the busbars 2 (left-right direction in Figure 8). However, the short-circuit suppression effect does not increase proportionally with the length of the second insulating wall 7 in the front-to-back direction. Also, as already mentioned, it is sometimes better not to have the first insulating wall 4 cover the entire width of the busbars 2 (width in the front-to-back direction). Considering these factors, it is preferable that the first insulating wall 4 extends further back than the second insulating wall 7, but the second insulating wall 7 extends further forward than the first insulating wall 4.

[0033] In other words, it is preferable that the first insulating wall 4 extends further back than the second insulating wall 7, while the second insulating wall 7 extends further forward than the first insulating wall 4, and that the first insulating wall 4 and the second insulating wall 7 partially overlap when viewed in the direction of the busbars 2.

[0034] Incidentally, in the examples shown in Figures 3 and 4, the first insulating wall 4 is sandwiched between the bar holders 6 to prevent movement, but in the examples shown in Figures 7 to 9, the first insulating wall 4 is fixed to the bar holder fixing member 55 using screws. As can be seen from these examples, the first insulating wall 4 can be attached in any manner. This is because the attachment method itself does not have much bearing on preventing short circuits between the busbars 2.

[0035] Although the present invention has been described above with reference to the embodiments described, the present invention is not limited to the above embodiments and can be implemented in various forms. [Explanation of Symbols]

[0036] 2 bus bars 3 Power distribution equipment 4. First Insulation Wall 5 discs 6 Bar holder 7. Second Insulation Wall 41 Contact part 61 First insulating wall insertion section 81 Protective Plate

Claims

1. Power distribution equipment and Multiple busbars connected to the power distribution equipment, The panel includes, at least a portion of, a first insulating wall interposed between the busbars, A pole-to-pole protection structure for a panel busbar, where the first insulating wall is located behind the power distribution equipment.

2. The busbar is sandwiched between the bar holders. The inter-pole protection structure for a panel busbar according to claim 1, comprising a first insulating wall insertion portion into which a first insulating wall is inserted in a bar holder that clamps the busbar.

3. The busbar and the first insulating wall extend vertically. The inter-pole protection structure for a panel busbar according to claim 2, wherein the first insulating wall is provided with a contact portion that can contact the upper surface of at least one bar holder.

4. A circuit board busbar inter-pole protection structure according to any one of claims 1 to 3, wherein a second insulating wall, at least a portion of which is interposed between the busbars, is provided on a protective plate that is mounted so as to cover a portion of the busbars.

5. The first insulating wall extends further back than the second insulating wall, but the second insulating wall extends further forward than the first insulating wall. The inter-pole protection structure for a panel busbar according to claim 4, wherein the first insulating wall and the second insulating wall partially overlap when viewed in the direction of the busbar arrangement.

Images