Drawer type control unit

Abstract

A draw-out type control unit (21) stored in a housing (A) of a control center (20) is equipped with a draw-out type control unit connection device (1) which serves as a relay for the supply of power to the load equipment. The draw-out type control unit connection device (1) is configured to attach an extension conductor (8) for connecting an electric wire (4) to a contact (2) of a unit side junction mechanism attached to the draw-out type control unit side, and to provide an insulating case (3) capable of storing the extension conductor (8). The insulating case (3) is configured to have perforations (9) so that the extension conductor (8) can be exposed only in the area for connecting the electric wire (4) and part of the insulating case (3) can be removed.

Description

[Technical field]

[0001] This application relates to a drawer-type control unit. [Background technology]

[0002] Conventional draw-out type control unit connection devices include those that are composed of a plug-in connection device and a terminal block device fixed to the switchboard body. The connection device is covered with a resin case to protect the exposed conductor parts and ensure insulation performance between each phase of the three-phase AC (see Patent Document 1).

[0003] In addition, a conventional draw-out type control unit connection device had draw-out type functional units consisting of an assembly of circuit breakers and monitoring and control devices lined up on the left and right inside a unit storage frame, with automatically interlocking power supply side contacts and load side contacts provided on the back of each functional unit, and a relay contact unit consisting of a contact plug and a horizontal busbar, and a contact socket arranged on the back of the unit storage frame facing these contacts, and through these the main circuit of the functional unit was connected to the power supply side vertical busbar laid inside the panel and to the load connection terminal block arranged on the side of the frame. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 60-144104 [Patent Document 2] JP 2008-245334 A Summary of the Invention [Problem to be solved by the invention]

[0005] The draw-out device of the draw-out type control unit is covered by a resin case for the purpose of insulation between each phase. Therefore, there are restrictions on the direction and size of the electric wires drawn into the unit, which may make wiring difficult depending on the rated capacity of the load to be connected. In addition, in the past, only a single screw hole was provided, so the connection direction of the terminal was determined by the screw hole, making it difficult to connect the electric wire in any direction.

[0006] Furthermore, due to limitations on the size and drawing direction of the electric wire used, there has been a problem in that when the amount of heat generated from the electric wire during current flow is large, an electric wire with a larger diameter cannot be used. If large-diameter wires cannot be used, the temperature rise in the wires will be large when electricity is applied, which will result in a large temperature rise in the entire switchboard. As the temperature rises inside the switchboard, there is a higher possibility that malfunctions will occur in the devices used in the control unit, causing the original control and protection functions to no longer work, which is a problem.

[0007] The present application discloses technology for solving the problems described above, and aims to improve the freedom of wiring within the unit and facilitate wiring work by making it possible to determine the direction in which the wiring within the control unit is pulled out from the draw-out type control unit connection device in any direction. [Means for solving the problem]

[0008] The drawer-type control unit disclosed in the present application is housed in a control center housing, the drawout-type control unit includes a drawout-type control unit connection device that relays power supply from the drawout-type control unit to a load facility, The draw-out type control unit connection device is provided with an extension conductor for connecting an electric wire to a contact of a unit-side junction mechanism attached to the draw-out type control unit, and an insulating case for storing the extension conductor; The insulating case is configured to have perforations so that a portion of the insulating case can be removed while exposing the extension conductor only in an area for connecting the electric wire. 、 The extension conductor is configured to be able to connect the electric wires in three axial directions. It is something.

[0009] Another drawer-type control unit disclosed in the present application is housed in a control center housing, and includes: the drawout-type control unit includes a drawout-type control unit connection device that relays power supply from the drawout-type control unit to a load facility, The draw-out type control unit connection device is configured to attach an extension conductor for connecting an electric wire to a contact of a unit side junction mechanism attached to the draw-out type control unit side, and to attach a second conductor attachment to the extension conductor, which can be replaced according to the drawing direction of the electric wire. 、 The second conductor attachment is configured to be able to connect the electric wire from three axial directions. It is something. Effect of the Invention

[0010] According to the draw-out type control unit disclosed in the present application, the direction in which the wiring within the control unit is pulled out from the draw-out type control unit connection device can be determined in any direction, thereby improving the freedom of wiring within the unit and making wiring work easier. [Brief description of the drawings]

[0011] [Figure 1] 1 is a perspective view showing a control center equipped with a drawer-type control unit according to a first embodiment. FIG. [Diagram 2] FIG. 2 is a perspective view showing a drawer-type control unit according to the first embodiment. [Diagram 3] FIG. 11 is a perspective view showing a drawer-type control unit connection device according to a comparative example. [Figure 4] FIG. 13 is a perspective view showing a junction mechanism attached to a unit side according to a comparative example. [Diagram 5] FIG. 13 is a perspective view showing a junction mechanism attached to a housing side according to a comparative example. [Figure 6] 13 is a perspective view showing a contact built into a drawer-type control unit connection device according to a comparative example; FIG. [Figure 7] 4 is a perspective view showing a junction mechanism of a drawer-type control unit connection device attached to the unit side according to embodiment 1. FIG. [Figure 8] 1 is a perspective view showing a unit-side junction mechanism of a drawer-type control unit connection device according to embodiment 1. FIG. [Figure 9] 1 is a perspective view showing a unit-side junction mechanism of a drawer-type control unit connection device according to embodiment 1. FIG. [Figure 10] 1 is a perspective view showing a unit-side junction mechanism of a drawer-type control unit connection device according to embodiment 1. FIG. [Figure 11] 1 is a perspective view showing a unit-side junction mechanism of a drawer-type control unit connection device according to embodiment 1. FIG. [Figure 12] FIG. 11 is a perspective view showing a unit-side junction mechanism of a drawer-type control unit connection device according to embodiment 2. [Figure 13] FIG. 11 is a perspective view showing a unit-side junction mechanism of a drawer-type control unit connection device according to embodiment 2. [Figure 14] FIG. 11 is a perspective view showing a unit-side junction mechanism of a drawer-type control unit connection device according to embodiment 2. [Figure 15] FIG. 11 is a perspective view showing a unit-side junction mechanism of a drawer-type control unit connection device according to embodiment 2. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Embodiment 1 The present application relates to a draw-out type control unit connecting device that serves as a plug-in type automatic connecting device that relays the supply of power from a draw-out type control unit stored in a distribution board such as a control center to a load facility. Fig. 1 is a perspective view showing a typical control center equipped with a draw-out type control unit, with the door of the duct room open so that the connection device of the draw-out type control unit can be seen. In Fig. 1, the control center 20 performs opening / closing, control, protection, monitoring, etc. of the electric circuit to the load equipment connected to the low-voltage distribution circuit. A plurality of draw-out type control units 21 having these functions are stored in each compartment of the control center 20.

[0013] Each drawout type control unit 21 is configured to receive power from a busbar inside the housing A of the control center 20, and most of the drawout type control units 21 are provided with a junction function for power supply in order to automatically connect. When each drawout type control unit 21 is inserted into the housing A of the control center 20, it is automatically connected to the busbar inside the housing A or to the electric wire connected to the load equipment. In FIG. 1, the entire housing A and the housing side junction mechanism B are drawn so that they can be seen. The housing side junction mechanism B constitutes a part of the drawout type control unit connection device 1 described later. In other words, the junction part is included in the drawout type control unit connection device 1. The unit side junction mechanism is attached to the drawout type control unit 21, and the housing side junction mechanism is attached to the housing A. By inserting the drawout type control unit 21 into the housing A, the unit side junction mechanism and the housing side junction mechanism are automatically connected.

[0014] Figure 2 is a perspective view of a drawer-type control unit according to embodiment 1. In Figure 2, a drawer-type control unit connection device 1 is configured in a drawer-type control unit 21. Note that the shape of drawer-type control unit 21 differs between Figures 1 and 2 because in Figure 1, it is in a state where housing A is attached. When housing A is attached, a door and an operating handle are attached to the front, as shown in Figure 1.

[0015] Fig. 3 is a perspective view showing a comparative example of a drawer-type control unit connection device 100, and is a perspective view showing a state in which a unit-side junction mechanism 100A and a housing-side junction mechanism 100B are connected. Fig. 4 is a perspective view showing a comparative example of a unit-side junction mechanism 100A attached to the unit side, and Fig. 5 is a perspective view showing a comparative example of a housing-side junction mechanism 100B attached to the housing side, and electrical continuity is achieved by connecting the unit-side junction mechanism 100A shown in Fig. 4 and the housing-side junction mechanism 100B shown in Fig. 5.

[0016] In Fig. 4, the unit-side junction mechanism 100A has built-in contacts (female) 2 for connecting the wiring within the unit, and these contacts (female) 2 are covered by an insulating case 3. In Fig. 5, the housing-side junction mechanism 100B has built-in conductors (male) 5 protruding like blades for connecting the wiring within the unit, and when the draw-out type control unit is inserted into the housing A, the contacts (female) 2 are inserted and brought into contact with the conductor (male) 5, so that the draw-out type control unit can automatically be electrically connected to the load equipment.

[0017] Fig. 6 is a perspective view showing a contact (female) for connecting the internal wiring of a unit built into a draw-out type control unit connection device, which is a comparative example. In Fig. 6, the contact (female) 2 has a screw hole, and a terminal 6 attached to the end of an electric wire 4 is connected with a bolt 7. The contact (female) 2 is covered with an insulating case 3, so the direction in which the electric wire 4 can be pulled out depends on the shape of the insulating case 3.

[0018] Figure 7 is a perspective view showing the junction mechanism of the drawer-type control unit connection device attached to the unit side according to embodiment 1. Note that Figure 7 corresponds to Figure 4, and the drawer-type control unit connection device is configured by connecting the unit-side junction mechanism 1A shown in Figure 7 and the housing-side junction mechanism shown in Figure 5. In embodiment 1, as shown in FIG. 7, an extension conductor 8 for connecting an electric wire is attached to the contact (female) 2 of the junction mechanism 1A attached to the unit side, and the size of the insulating case 3 covering the extension conductor 8 is made large enough to accommodate the extension conductor 8.

[0019] The extension conductor 8 is U-shaped to accommodate connection of the electric wire 4 from three axial directions (X-axis, Y-axis, and Z-axis in FIG. 7). The insulating case 3 is configured so that a part of it can be easily removed to expose only the area of ​​the extension conductor 8 required for connecting the electric wire. For this purpose, perforations 9 (91, 92, 93) are provided in the insulating case 3. The perforations 9 here can be considered to be cracks that can be cut by hitting a punching die with a hammer or the like. The insulating case 3 can be made of a material such as glass-reinforced plastic. To make it even easier to cut, the thickness of the resin at the location where the perforations 9 are provided can be made thinner.

[0020] 8, 9, and 10 are perspective views showing the unit-side junction mechanism of the draw-out type control unit connection device that is attached to the draw-out type control unit side when the electric wire is drawn in any direction, and are perspective views showing the unit-side junction mechanism shown in FIG. 7 with a part of the insulating case 3 removed along perforation 9. As shown in Figures 8, 9, and 10, when drawing out the electric wires in any direction, a part of the insulating case 3 is removed along the perforations 9 in the terminal connection direction and the drawing direction of each electric wire. That is, in Figure 8, a part of the insulating case 3 is cut away along the perforations 91, and the electric wires 4 are connected in the Z-axis direction. In Figure 9, a part of the insulating case 3 is cut away along the perforations 92, and the electric wires 4 are connected in the X-axis direction. In Figure 10, a part of the insulating case 3 is cut away along the perforations 93, and the electric wires 4 are connected in the Z-axis direction (opposite to Figure 8). Then, only the necessary area of ​​the extension conductor 8 is exposed, and the terminal 6 attached to the end of the electric wire 4 is connected with a bolt 7.

[0021] As described above, since the electric wires 4 can be drawn out in any direction, it is now possible to connect the electric wires 4 in directions that could not be drawn out in the past, improving the degree of freedom of wiring within the draw-out type control unit and enabling electric wire connection from each axial direction, thereby improving the workability when assembling the unit.

[0022] FIG. 11 is a perspective view showing the unit-side junction mechanism of a draw-out type control unit connection device that is attached to the unit side when a conductor attachment is attached to an extension conductor and the electric wire is drawn out in any direction. As shown in Fig. 11, by connecting a conductor attachment (first conductor attachment) 10 bent by 90 degrees to an extension conductor 8, it becomes possible to connect electric wires in an axis perpendicular to the three axes to which the extension conductor 8 shown in Fig. 7 can be connected. This makes it possible to increase the number of wire pull-out directions and connect electric wires from three axial directions (X-axis, Y-axis, and Z-axis) as in the case of Fig. 7, and also provides more variety in the wire connection directions than in the case of Fig. 7. This further improves the degree of freedom of wiring within the control unit. Fig. 11 shows an example in which electric wires are connected only in the Z-axis direction, but electric wires can also be connected in the X-axis direction and the Y-axis direction. Furthermore, in Fig. 11, the spacing between the electric wires 4 can be increased, and the size of the electric wires used can be further increased.

[0023] As described above, according to the draw-out type control unit connection device of the first embodiment, the direction in which the wires are drawn from the draw-out type control unit connection device within the draw-out type control unit can be determined in any direction. This improves the degree of freedom of wiring within the draw-out type control unit, and makes the wiring work easier. Also, when heat generation within a drawer-type control unit is a concern, the size of the wires used can be increased, thereby reducing the amount of heat generated by the wires. As a result of the above, it becomes possible to accommodate drawer-type control units that could not be accommodated in a switchboard (control center) due to the total heat generation, thereby improving the integration capacity of the switchboard.

[0024] Embodiment 2 12, 13 and 14 are perspective views showing the junction mechanism of a draw-out type control unit connection device to be attached to the unit side when a conductor attachment is attached to the extension conductor and the electric wire is drawn out in any direction in the second embodiment. In this embodiment, wiring within the draw-out type control unit is performed through conductor attachments (second conductor attachments) 11, 12, and 13 connected to a linear extension conductor 8 attached to a contact (female) 2 of a junction mechanism attached to the draw-out type control unit.

[0025] In this embodiment, as shown in Figures 12, 13 and 14, conductor attachments 11, 12 and 13 having different shapes are attached to an extension conductor 8 attached to a contact (female) 2 of a junction mechanism attached to a draw-out type control unit side, in accordance with the drawing direction of the electric wire 4. In other words, the conductor attachments 11, 12 and 13 which can be replaced according to the drawing direction of the electric wire 4 are attached to the extension conductor 8.

[0026] Conductor attachments come in various shapes to enable connection in each direction. In FIG. 12, a conductor attachment 11 with an L-shaped cross section is used. When mounting in a direction optimized for the wiring in the draw-out type control unit, a U-shaped conductor attachment 12 is used in consideration of the wiring in the draw-out type control unit, as shown in FIG. 13. When connecting from three axial directions (X-axis, Y-axis, Z-axis), a conductor attachment 13 is used that is basically rectangular parallelepiped-shaped with a portion of the rectangular parallelepiped missing, as shown in FIG. 14. Use of such a conductor attachment 13 is particularly effective because it allows connection from three axial directions and also increases the spacing between the electric wires. By devising the shape in this way, it is possible to connect the electric wires 4 in various directions. By appropriately selecting conductor attachments 11, 12, 13 optimized for the wiring inside the unit, it becomes easy to connect the electric wires simply by changing the conductor attachment, and wiring work inside the draw-out type control unit becomes easy.

[0027] Figure 15 is a perspective view showing a junction mechanism in which flexible insulating caps are attached to the conductor and terminal parts of a draw-out type control unit connection device. An insulating cap 14 is provided to protect the insulation of the exposed conductor parts. The insulating cap 14 covers the conductor attachments 11, 12, and 13 to protect the insulation of the exposed conductor parts. In order to protect the live parts, as shown in FIG. 15, an insulating cap 14 made of a flexible resin that is easy to attach is placed over the conductor and terminal parts. Here, the flexible resin is, for example, soft PVC (polyvinyl chloride). Conventional insulation protection using an insulating case uses a lot of space in the draw-out type control unit, and the devices that can be stored in the draw-out type control unit are limited. The flexible insulating cap 14 enables insulation protection of each phase in a small space, and many devices can be stored in the draw-out type control unit. Since more devices can be stored in the draw-out type control unit, the performance of the draw-out type control unit can be improved. Furthermore, by using a flexible insulating cap instead of an insulating case, the necessary insulation performance between each phase can be secured in a small space. In the second embodiment, since the conductive portion is more exposed than in the first embodiment, it is particularly significant to provide the flexible insulating cap.

[0028] Although the present application describes various exemplary embodiments and examples, the various features, aspects, and functions described in one or more embodiments are not limited to application to a particular embodiment, but may be applied to the embodiments alone or in various combinations. Therefore, countless modifications not exemplified are assumed within the scope of the technology disclosed in the present specification, including, for example, modifying, adding, or omitting at least one component, and further, extracting at least one component and combining it with a component of another embodiment. [Explanation of symbols]

[0029] 1 Draw-out type control unit connection device, 2 contact, 3 insulating case, 4 electric wire, 5 conductor, 6 terminal, 7 volt, 8 extension conductor, 9 perforation, 10~13 conductor attachment, 14 insulating cap, 20 control center, 21 draw-out type control unit.

Claims

1. A drawer-type control unit housed in a control center housing, the drawout-type control unit includes a drawout-type control unit connection device that relays power supply from the drawout-type control unit to a load facility, The draw-out type control unit connection device is provided with an extension conductor for connecting an electric wire to a contact of a unit-side junction mechanism attached to the draw-out type control unit, and an insulating case for storing the extension conductor; The insulating case is configured to have perforations so that a portion of the insulating case can be removed while exposing the extension conductor only in an area for connecting the electric wire, The extension conductor is a draw-out type control unit configured so that the electric wires can be connected in three axial directions.

2. 2. The draw-out type control unit according to claim 1, further comprising a first conductor attachment connected to said extension conductor, said first conductor attachment being capable of connecting said electric wires and widening the space between said electric wires.

3. A drawer-type control unit housed in a control center housing, the drawout-type control unit includes a drawout-type control unit connection device that relays power supply from the drawout-type control unit to a load facility, the draw-out type control unit connection device is configured to attach an extension conductor for connecting an electric wire to a contact of a unit-side junction mechanism attached to the draw-out type control unit side, and to attach a second conductor attachment to the extension conductor, the second conductor attachment being replaceable in accordance with the drawing direction of the electric wire; The second conductor attachment is a draw-out type control unit configured to be able to connect the electric wires from three axial directions.

4. 4. The drawer-type control unit according to claim 3, further comprising an insulating cap for protecting the insulation of the exposed conductor portion.

5. 5. The drawer type control unit of claim 4, wherein said insulating cap covers said second conductor attachment.

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