Switchgear and fixtures for electrical distribution boards

Abstract

To solve a problem in which it is difficult to secure equipment mounting space in a switchgear, and the workability for mounting equipment is poor.SOLUTION: An equipment mounting device for a distribution board includes a metal plate having an opening, a support member for equipment mounting provided on one surface of the metal plate, an insulating insulator provided on the other surface of the metal plate, and a hanging metal fitting provided at the end of the metal plate, and equipment can be easily arranged in a narrow equipment mounting space in a suspended switchgear with the hanging metal fitting.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] This application relates to an appliance mounting device for a switchboard and a switchgear using the appliance mounting device for a switchboard.

Background Art

[0002] In places where the space inside the switchboard is small, the workability of mounting appliances and wiring work deteriorates. As an example of mounting an appliance using such a small space, there is Patent Document 1. In Patent Document 1, a part of the door of the switchboard is bent to form a support member, and appliances are mounted inside the door.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] For example, in a switchgear that is divided into a plurality of parts by a grounded partition plate, and in which a circuit breaker, a lightning arrester, a bus bar, a control circuit, etc. are arranged, and has a drawer mechanism for maintenance of each device, securing an appliance mounting space inside the switchboard becomes a problem. That is, while the space inside the board is taken up for housing each device, the number of appliances used for control and condition measurement of the housed devices is large, and there has been a problem that the space for mounting and wiring these appliances cannot be sufficiently secured only by the door and the inner side surface of the switchboard.

[0005] In particular, in a DC switchgear that houses a DC high-speed circuit breaker for an electric railway substation, since it is necessary to provide a large arc space above the circuit breaker, the depth dimension inside the switchgear is difficult to obtain, and there has been a problem that it is difficult to secure an appliance mounting space. Therefore, it has been necessary to secure a mounting space for control appliances in front of the arc space. Because the side walls of the control unit of a DC switchgear are often occupied by external power lines, internal wiring, and related equipment, when installing control equipment in the space at the front of the arc space, which is the innermost space of the control unit, the worker's body comes into contact with the equipment installed on the side wall, resulting in a narrow workspace and poor work efficiency.

[0006] This invention was made to solve the above-mentioned problems, and aims to provide a device mounting device for a distribution board that allows for easy installation and wiring of devices even when it is difficult to secure space for device installation within the switchgear. [Means for solving the problem]

[0007] The appliance mounting device for a power distribution board according to the present application comprises a metal plate having an opening, a support member for mounting appliances provided on one side of the metal plate, an insulating insulator provided on the other side of the metal plate, and a hanging bracket provided at the end of the metal plate. [Effects of the Invention]

[0008] According to this invention, the mounting and wiring of equipment can be easily performed using the support members provided on the metal plate for the equipment mounting device of the distribution board. Furthermore, the metal plate is made lighter by the openings and has hanging brackets, so equipment can be easily placed in the narrow equipment mounting space inside the switchgear by hanging it with the brackets. In addition, since it has insulating insulators, it can be fixed inside the panel in an insulated state from other equipment housed inside the switchgear. [Brief explanation of the drawing]

[0009] [Figure 1] This is a side view of the switchgear according to Embodiment 1. [Figure 2] This figure shows a power distribution panel equipment mounting device according to Embodiment 1, where Figure 2(A) is a front view, Figure 2(B) is a rear view, and Figure 2(C) is a side view. [Figure 3]This figure shows a switchgear using a power distribution panel equipment mounting device according to Embodiment 1. Figure 3(A) is a front view of the DD cross-section in Figure 1, and Figure 3(B) is a plan view of the EE cross-section in Figure 3(A). [Figure 4] This figure shows a mounting device for a power distribution board according to Embodiment 2, where Figure 4(A) is a front view and Figure 4(B) is a rear view. [Figure 5] This figure shows a power distribution panel equipment mounting device according to Embodiment 3, where Figure 5(A) is a front view and Figure 5(B) is a rear view. [Modes for carrying out the invention]

[0010] Embodiment 1. Figure 1 is a side view of a switchgear according to Embodiment 1. The switchgear 200 is a distribution panel in which various devices are arranged in sections separated by partition plates. This embodiment shows an example of a DC switchgear housing a DC high-speed circuit breaker for a railway substation. In Figure 1, a circuit breaker section 100 housing the DC high-speed circuit breaker is provided, and above it, an arc space section 110 necessary for interrupting the DC current is provided. A disconnector section 120 for maintaining the circuit breaker is also provided. These devices are controlled by control devices provided in the control unit 130. The distribution panel equipment mounting device 10 of this application is used to mount the control devices within this control unit 130. The surge arrester section 140 is provided at the bottom of the distribution panel, and a surge arrester grounding cable is connected from a pit in the floor. Each device in the panel is connected by electric wires or conductors in the wiring section 150.

[0011] Figure 2 shows a power distribution panel fixture mounting device 10, where Figure 2(A) is a front view, Figure 2(B) is a rear view, and Figure 2(C) is a side view. In Figure 2, the power distribution panel fixture mounting device 10 has a metal plate 1 with an opening 2, and on one side of this plate, there is a fixture mounting rail 3 which serves as a support member for mounting fixtures, and a wiring duct mounting frame 4 to which the wiring duct of the fixtures is attached. In addition, both sides of the metal plate 1 are reinforced by a Z-shaped frame 5. The fixture mounting rail 3 uses a German standard such as a DIN rail, allowing fixtures that conform to the standard to be mounted with a single touch. Furthermore, insulating insulators 6 are fixed to the back surface of the metal plate 1 with bolts, allowing the power distribution panel fixture mounting device 10 to be bolted to a partition plate inside the switchgear or the like in an insulated state. The insulators 6 are cylindrical insulators, with female threads provided at both ends of the cylinder insulated from each other, and are structured to be fixed to a support with bolts. Furthermore, a hanging bracket 7 is provided at the upper end of the metal plate 1, and a hook hole is provided for suspending the electrical panel equipment mounting device 10 from above.

[0012] Figure 3 shows an example in which a distribution board equipment mounting device 10 is installed inside the switchgear 200. Figure 3(A) is a front view of the DD cross-section of Figure 1, and Figure 3(B) is a plan view of the EE cross-section of Figure 3(A). In Figure 3, the distribution board equipment mounting device 10 is installed adjacent to the arc space section 110 in the control unit 130 of the switchgear 200. The distribution board equipment mounting device 10 is equipped with a control device 20 and a wiring duct 30, and is wired. It is also bolted to the front wall surface which serves as a partition plate of the arc space section 110 by an insulator 6.

[0013] During factory assembly of the switchgear 200, the equipment is attached to the distribution board equipment mounting device 10 and wiring is performed with the switchgear 200 detached from the switchgear 200. The equipment mounting rail 3 is used to attach the equipment 20, and the wiring duct 30 attached to the wiring duct mounting frame 4 is used for wiring between the equipment. Furthermore, depending on the equipment 20, it is possible to perform rear wiring using the opening 2 provided in the metal plate 1. Since the equipment attachment and wiring work to the distribution board equipment mounting device 10 can be performed outside the switchgear 200, there are no space constraints, and work efficiency can be improved.

[0014] Once the installation and wiring are complete, the distribution board equipment mounting device 10, with these devices and wiring still mounted, is suspended by a crane using the suspension bracket 7 and lowered from the ceiling of the switchgear 200 to its installation position within the control unit 130. Therefore, the top plate of the switchgear 200 is detachable for raising and lowering the distribution board equipment mounting device 10 by crane. This structure allows for the replacement or removal and modification of the distribution board equipment mounting device 10 with the devices and wiring already mounted, even during on-site modification work, thereby reducing work time and improving work efficiency. In addition, connectors (not shown) are used for the wiring connecting the devices mounted on the distribution board equipment mounting device 10 to other equipment. These connectors allow for easy connection and disconnection of the distribution board equipment mounting device 10 from the external wiring.

[0015] As described above, since the metal plate 1 of the distribution board equipment mounting device 10 is provided with an opening 2 for weight reduction, the weight required to suspend the distribution board equipment mounting device 10 can be reduced, making it possible to suspend it without using heavy machinery. Furthermore, the opening 2 allows for wiring on the back of the installed fixture, simplifying the wiring route. Furthermore, the electrical equipment mounting device 10 for the switchboard can be bolted to the front wall surface serving as the partition plate of the arc space portion 110 using the insulator 6. Therefore, it becomes possible to arrange the equipment even in a place where the mounting work could not be done due to being obstructed by the equipment provided on the side wall surface of the control unit 130. Also, the available space on the side wall surface of the control unit 130 increases. For the operator, there is no need to perform the work for mounting the equipment in a narrow space.

[0016] Embodiment 2. FIG. 4 is a diagram showing the electrical equipment mounting device 10 for the switchboard according to Embodiment 2, FIG. 4(A) is a front view, and FIG. 4(B) is a rear view. The same components as those described in Embodiment 1 are denoted by the same reference numerals and the description thereof is omitted, and the components that have changed in Embodiment 2 will be described. In FIG. 4, the opening 2a provided in the metal plate 1 of the electrical equipment mounting device 10 for the switchboard has an elliptical shape. By forming the metal plate 1 in this way, it becomes easier to ensure the strength against the bending and torsional loads applied to the electrical equipment mounting device 10 for the switchboard. Even if the opening 2a is formed in an elliptical shape in this way, it is possible to obtain the effects described in Embodiment 1.

[0017] Embodiment 3. FIG. 5 is a diagram showing the electrical equipment mounting device 10 for the switchboard according to Embodiment 3, FIG. 5(A) is a front view, and FIG. 5(B) is a rear view. The same components as those described in Embodiment 1 are denoted by the same reference numerals and the description thereof is omitted, and the components that have changed in Embodiment 3 will be described. In FIG. 5, the opening 2b provided in the metal plate 1 of the electrical equipment mounting device 10 for the switchboard is a plurality of quadrilaterals arranged in a lattice pattern. By forming the metal plate 1 in this way, it becomes easier to design the electrical equipment mounting device 10 for the switchboard in consideration of weight reduction and rear surface wiring. Also, by performing R processing to make the corners of the quadrilaterals rounded, stress concentration against the load can be prevented and the strength can be increased. Even if the opening 2b is formed in a quadrilateral shape in this way, it is possible to obtain the effects described in Embodiment 1.

[0018] Even if it is other than the shape of the opening 2 of the metal plate 1 described in Embodiments 1 to 3, for example, a shape such as a mesh shape or a punched hole shape can similarly achieve weight reduction and obtain similar effects.

[0019] Although various exemplary embodiments and examples are described in the present application, the various features, aspects, and functions described in one or more embodiments are not limited to the application of a specific embodiment, but are applicable to the embodiments alone or in various combinations. Therefore, countless variations not illustrated are envisioned within the scope of the technology disclosed in the specification of the present application. For example, it shall include the case of modifying, adding, or omitting at least one component, and further, the case of extracting at least one component and combining it with the components of other embodiments.

Description of Reference Numerals

[0020] 1 Metal plate, 2, 2a, 2b Opening, 3 Appliance mounting rail, 4 Wiring duct mounting frame, 5 Z-shaped frame, 6 Insulator, 7 Suspension fitting, 10 Appliance mounting device for switchboard, 20 Appliance, 30 Wiring duct, 100 Circuit breaker section, 110 Arc space section, 120 Circuit breaker section, 130 Control section, 140 Lightning arrester section, 150 Wiring section, 200 Switchgear.

Claims

1. a metal plate having an opening; a support member for mounting an appliance provided on one surface of the metal plate; an insulator for insulation provided on the other surface of the metal plate; a hanging metal fitting provided at an end of the metal plate; A device mounting device for a switchboard, comprising:

2. 2. The device mounting apparatus for a switchboard according to claim 1, wherein the support member is a device mounting rail.

3. 3. The device for mounting an appliance on a switchboard according to claim 1, wherein the opening of the metal plate has an elliptical shape.

4. 3. The device mounting device for a switchboard according to claim 1, wherein the opening of the metal plate is rectangular, and the metal plate is lattice-shaped.

5. A switchgear using the appliance mounting device for a switchboard according to any one of claims 1 to 4, characterized in that a control appliance for controlling equipment stored in the switchboard is attached to and wired to the appliance mounting device for a switchboard.

6. The switchgear according to claim 5, wherein the switchboard fixture mounting device is provided adjacent to an arc space of a circuit breaker.

7. The switchgear according to claim 5 or 6, further comprising a detachable top plate, wherein the switchgear can be raised and lowered using the hanging hardware with the top plate removed.

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