JP2006014500A - Cubicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cubicle which can be reduced in installation floor area and also can be suppressed in height. <P>SOLUTION: A transformer 2 is arranged on the floor 1b in a box body 1, and an instrument voltage current transformer 6 is arranged in a position overlapped with the transformer 2 above the transformer 2. A high-voltage load switch 4, a capacitor 3 for power and a lightning arrester 7 are arranged adjacently in a horizontal direction between the transformer 2 and the instrument voltage current transformer 6. A cable drawing space 10a for drawing a high-voltage cable 10 is provided on the left side of the transformer 2, a watt hour meter installation space 9a is provided in front of the transformer 2 and the cable drawing space 10a, and an installation panel 8 is removably set to the floor 1b. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a cubicle in which power receiving and distribution equipment is collectively accommodated in a box, and more particularly to a technique for downsizing a cubicle.

For example, Patent Document 1 discloses a technique for reducing the size of a cubicle in which power receiving and distribution facilities are collectively accommodated in a box. This is a configuration in which a transformer, a power capacitor, a lightning arrester, a high-voltage load switch, and an instrument transformer current transformer are arranged vertically from the bottom.
JP 2004-112962 A

The structure of the said patent document 1 can reduce an installation floor area by arranging each apparatus vertically, and there exists an effect in slimming of a box. Moreover, the effect which can shorten the lead wire which connects each apparatus is also show | played, and it is preferable for economical efficiency. However, it has been difficult to effectively suppress the height direction.
In view of the above problems, an object of the present invention is to provide a cubicle capable of reducing the installation floor area and suppressing the height.

In order to solve the above-mentioned problems, the invention according to claim 1 is provided with a transformer, a high-voltage load switch, and a power capacitor in a box body having at least a front face constituted by a door. A cubicle with a current collector installation space and a watt hour meter installation space, with a transformer placed on the floor of the box, and an instrument transformer current transformer installation space at a position overlapping the transformer above the transformer And a high-voltage load switch and a power capacitor are disposed adjacent to each other in the lateral direction between the transformer and the transformer current transformer installation space.
With this configuration, it is possible to configure if there is a floor area where the transformer, which is the largest device, can be installed, the installation floor area can be reduced, and the space between the transformer and the current transformer installation space can be reduced. Thus, the height can be suppressed, and the entire cubicle can be reduced in size.

The invention of claim 2 is the invention of claim 1, wherein the watt-hour installation space is provided in a portion adjacent to the transformer, and a detachable mounting panel is erected on the box floor, A watt hour meter is attached.
With this configuration, the watt-hour meter is installed at a position adjacent to the transformer, so that it does not interfere with the installation of the instrument transformer and the maintenance of the high-voltage load switch. Further, by making the mounting panel removable, a work space can be secured, and the pull-in operation can be performed without removing the side plate or the like when performing the pull-in operation and the connection operation of the high-voltage cable.

  The invention of claim 3 is characterized in that, in the invention of claim 1 or 2, a lightning arrester is arranged on the back of the high-voltage load switch, and by this configuration, both the high-voltage load switch and the high-voltage lightning arrester are connected. Terminals can be brought close to each other and connection work is easy. Further, the lead wire is not routed and the amount of lead wire used is small.

  Thus, according to the present invention, if there is a floor area where the transformer can be installed, it can be configured, the installation floor area can be reduced, and the space between the transformer and the current transformer installation space can be reduced. It becomes possible, the height can be suppressed, and the entire cubicle can be reduced in size.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, embodiments of the invention will be described in detail with reference to the drawings. 1 to 3 show an example of a cubicle according to the present invention, FIG. 1 is a front view of the cubicle showing the arrangement of internal devices, FIG. 2 is a right side view of the cubicle similarly showing the arrangement of internal devices, and FIG. It is the cubicle left view which described internal equipment arrangement | positioning. In the figure, 1 is a cubicle box housing the power distribution equipment, 2 is a transformer, 3 is a power capacitor, 4 is a high voltage load switch with a power fuse 5, and 6a is an instrumental transformer current transformer 6. A transformer current transformer installation space for installation, 7 is a lightning arrester, and 8 is a mounting panel for installing a watt hour meter 9 and is provided in the watt hour installation space 9a. Further, 10 is a high-voltage cable drawn from below, and 11 is a protective cover for protecting the charging part. As for the box 1, the front is comprised by the door 1a and the right-and-left side and the back are obstruct | occluded.
And the transformer 2 is installed on the floor 1b of the box 1, the instrument transformer current transformer installation space 6a is provided at the uppermost part of the box above the transformer 2, and the power capacitor 3 is interposed between the two. And a high-voltage load switch 4 is arranged. Reference numeral 10 a denotes a cable lead-in space for drawing the high-voltage cable 10, and is provided on the left side of the transformer 2. The watt-hour installation space 9 a is formed on the left front side of the transformer 2 adjacent to the transformer 2.

  The transformer 2 is brought close to the right rear side of the box body 1, the primary side terminal 2 a that is the high voltage side is directed rearward, and the secondary side terminal 2 b that is the low voltage side is directed forward, and the floor surface of the box body 1. is set up. On the front side of the transformer 2, an instrument mounting plate 14 to which various instruments 12 and a circuit breaker 13 are attached is erected and installed on the floor 1 b in parallel with the door 1 a on the front of the box 1.

The mounting panel 8 is provided in the watt-hour installation space 9a, is disposed on the left side adjacent to the meter mounting plate 14, and covers the floor 1b so as to cover the front surface of the transformer 2 and further cover the front surface of the cable lead-in space 10a. It is installed upright. The instrument mounting plate 14 and the mounting panel 8 are arranged in a row, and various instruments 12 and watt hour meters 9 that are attached from windows (not shown) provided on the door 1a are visible. The mounting panel 8 has a mounting piece 8a that is bent forward and is installed by bolting the mounting piece 8a to the floor 1b or to the floor 1b via a mounting member, and can be easily removed. It has a configuration.
Note that the mounting panel 8 and the instrument mounting plate 14 are made of a metal frame, and are used by attaching a wooden plate for device mounting as required.

  The high-voltage load switch 4 and the lightning arrester 7 are assembled to a mounting frame 16 that extends from side to side in the vicinity of the back plate at the center of the box 1. The high-voltage load switch 4 is installed in the upper part of the transformer 2 with a plurality of switching mechanisms in the left-right direction, with the power-side terminal 4a at the upper end and the load-side terminal 4b at the lower end. Then, the operation handle 4c provided at the right corner is pulled forward to perform a tripping and blocking operation. Since the power receiving equipment is normally drawn in with a three-phase alternating current, the open / close mechanism is configured in triplicate, and this configuration is the same for the power capacitor 3 and the lightning arrester 7.

  The lightning arrester 7 is installed between the mounting frame 16 serving as the back portion of the high-voltage load switch 4 and the back plate of the box 1 with the high-voltage terminal 7a facing downward. It is installed so as to be slightly lower than the position of the load side terminal 4b. The power capacitor 3 is attached to the angle member 17 attached to the right side plate of the box 1 with the high-voltage terminal 3a facing downward, and the high-voltage terminal 3a substantially matches the height of the high-voltage terminal 7a of the lightning arrester 7. It is installed to do. Thus, wiring work is facilitated by slightly lowering the high-voltage terminal 7 a of the lightning arrester 7 than the load-side terminal 4 b of the high-voltage load switch 4. Also, by setting the high voltage terminal 7a of the lightning arrester 7 and the high voltage terminal 3a of the power capacitor 3 to the same height, the terminals are close to each other and can be easily connected with a few lead wires without routing the lead wires. it can.

  The instrumental transformer current transformer 6 installed in the instrumental transformer current transformer installation space 6a is supported and accommodated up and down. A lower frame 18 for placing the instrument transformer / current transformer 6 is provided in the upper part of the box 1 close to the high voltage load switch 4, and the upper part of the box 1 close to the top of the box 1 is used for the instrument. An upper frame 19 for fixing the upper end of the transformer current transformer 6 is provided. The instrumental current transformer 6 is bolted and fixed from above and below by the lower frame 18 and the upper frame 19 with the primary side terminal 6b on the left side and the secondary side terminal 6c on the right side.

With respect to the device assembled in this way, the high voltage cable 10 drawn into the cable drawing space 10a from below is supported by a bracket 21a provided on the left side plate on the way and wired upward, so that the instrument transformer / current transformer 6 To the primary side terminal 6b. This pull-in work can be easily carried out by removing the mounting panel 8 and simply opening the front without removing the side plate of the box 1, that is, simply opening the door 1 a.
The secondary side terminal 6 c of the instrumental transformer current transformer 6 is connected to the power supply side terminal of the high-voltage load switch 4 by a high-voltage lead wire 22. The high-voltage lead wire 22 is supported and wired by a bracket 21b attached to the right side plate on the way.

The load side terminal 4 b of the high voltage load switch 4 via the power fuse 5 is connected to the lightning arrester 7, the power capacitor 3, and the primary side terminal 2 a of the transformer 2 by a high voltage lead wire 22. As described above, this connection work is easy to work and requires only a short lead wire. Therefore, the connection work is easy and can be wired at low cost.
Moreover, since the primary side terminal 2a of the transformer 2 and the load side terminal 4b of the high-voltage load switch 4 can be arranged close to each other, both connections can be made with short lead wires, and wirings cross each other. There is no such a thing and it becomes the structure which is easy to wire. Since the high-voltage terminal 7 a of the lightning arrester 7 and the primary terminal 2 a of the transformer 2 are arranged close to each other, the high-voltage load switch 4 and the transformer 2 can be connected via the lightning arrester 7.
And the low voltage | pressure lead wire is connected to the secondary side terminal 2b of the transformer 2, it draws out of the box 1 from the downward direction via various instruments, and is connected to load. Also in this case, since the various meters 12 and the watt-hour meter 9 are arranged on the front side of the transformer 2, the connection can be made with a short lead wire and can be wired at a low cost.

In this way, the transformer and the instrument transformer current transformer are arranged so as to overlap vertically, and the high-voltage load switch and the power capacitor are arranged adjacent to each other in the horizontal direction. Can be reduced and the height can be reduced, and downsizing can be promoted.
In addition, since the watt-hour meter is installed at a position adjacent to the transformer, it does not obstruct the installation of the instrument transformer or the current transformer and does not obstruct the maintenance of the high-voltage load switch. Further, by making the mounting panel removable, a work space can be secured, and the pull-in operation can be performed without removing the side plate or the like when performing the pull-in operation and the connection operation of the high-voltage cable.

  In the above embodiment, the high voltage cable 10 is drawn into the drawing space 10a from below, but the high voltage cable may be drawn from above. In addition, the watt-hour meter installation space 9a is in front of both the lead-in space 10a of the high-voltage cable 10 and the transformer 2, but when the transformer 2 is relatively small or the meter mounting plate is large, The front of the cable lead-in space 10a is the main watt-hour installation space.

It is a front view showing an example of an embodiment of a cubicle according to the present invention and describing an arrangement of devices inside the cubicle. FIG. 2 is a right side view of FIG. 1 showing an arrangement of devices inside the cubicle. FIG. 2 is a left side view of FIG. 1 showing a device arrangement inside the cubicle.

Explanation of symbols

  1 .... Box body, 1a ... Door, 2. Transformer, 3 .... Power capacitor, 4 .... High voltage load switch, 6 .... Instrument current transformer, 6a ... Instrument transformer Installation space 7 ・ ・ Arrester, 8 ・ ・ Mounting panel, 9 ・ Electricity meter, 9 a ・ Electricity meter installation space, 10 ・ High voltage cable.

Claims (3)

A cubicle equipped with a transformer, a high-voltage load switch, a power capacitor, a transformer current transformer installation space, and a watt hour meter installation space inside a box having at least a front door. ,
A transformer is placed on the floor of the box, and an instrument transformer current transformer installation space is provided above the transformer in a position overlapping the transformer, and a high voltage is provided between the transformer and the instrument transformer current transformer installation space. A cubicle characterized in that a load switch and a power capacitor are arranged adjacent to each other in the lateral direction. The cubicle according to claim 1, wherein the watt-hour installation space is provided in a part adjacent to the transformer, a detachable attachment panel is erected on the box floor, and the watt-hour meter is attached to the attachment panel. The cubicle according to claim 1 or 2, wherein a lightning arrester is arranged on the back of the high-voltage load switch.

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