JP4309715B2 - Transformer room equipment - Google Patents

Description

  The present invention relates to a transformer room facility for transforming a distribution line voltage to a commercial voltage in a large-volume consumer such as a mid-to-high-rise apartment house, and in particular, a transformer that reduces material costs and construction costs. Regarding room facilities.

  Transforms from 6.6kv distribution lines to 200V and 100V commercial voltage for medium- and high-rise apartments such as condominiums and apartments usually use transformer rooms provided on the first and basement floors of medium- and high-rise houses. It is done.

  The 200V voltage is used, for example, for power relations such as an elevator and a pumping motor for a water tank, and the 100V voltage is used for lighting of each household and other various household appliances.

  Regarding the transformer room, the installation standards are stipulated in the “Main Line Method Guidelines for Middle and High-Rise Apartment Houses JE C A1024” issued by the Nippon Electric Construction Industrial Association, but the transformer room is usually Since it is provided as a rental room for electric power companies, the frontage, depth, ceiling height, etc. vary. For this reason, in the construction of transformer room facilities, metal round pipes are cut on site according to the provided transformer room, and round pipes that become pillars at multiple locations on the concrete floor surface are anchor bolts etc. Fixed, round pipes were assembled to these struts in the frontage direction and depth direction, and assembled as a frame as a whole, and a transformer, a primary side distribution line, a primary side switch, and the like were installed.

  For such on-site construction of transformer room facilities, the construction methods described in the private construction manuals specified by each electric power company, etc. are adopted, and in particular, known patent documents and non-patent documents Does not exist.

  However, in the transformer room equipment that cuts round pipes on site and assembles into a frame shape as described above, the total number of parts is large, for example, 140 to 150, and material costs increase, and processing on site Therefore, the construction time is long and the total cost is high.

  In addition, the transformer room equipment assembled in a frame shape has the problem that the support on the front side gets in the way and the workability of installation such as installing the primary side switch deteriorates, and the maintainability after construction is also poor. It was.

  Therefore, the present invention solves the above-mentioned problems, reduces the total number of parts and material costs, and can reduce the construction costs by reducing on-site processing as much as possible, and also has excellent construction workability and maintenance workability. The purpose is to provide transformer room facilities.

  In order to solve the above-mentioned problem, the transformer room facility of the present invention is a transformer room facility provided with a transformer for transforming from a distribution line voltage to a voltage for a middle-high-rise apartment house.

  A plurality of transformers are arranged and fixed on the front side, a plurality of support posts are arranged and fixed on the rear side, and a primary distribution line is arranged via a plurality of insulators attached to the upper part of these posts, and A plurality of primary switches are attached to a support metal and a light arm that are installed in a horizontal direction on a column, and a branch line branched from the primary distribution line is connected to the primary switch. 1).

  The present invention is characterized in that the column is a square column (claim 2).

  The present invention is characterized in that the plurality of insulators are mounted in juxtaposition in the vertical direction on upper portions of the plurality of support columns, respectively (Claim 3).

The present invention is characterized in that the plurality of insulators are respectively mounted in parallel in a horizontal direction on horizontal braces attached to upper ends of the plurality of support columns (claim 4).

  The present invention is characterized in that the support metal and / or the lightweight arm is detachably attached to the support column with a square clamp and a presser fitting (Claim 5).

  The present invention is characterized in that the presser fitting has a concave portion into which the support metal fitting is fitted and a concave portion into which the lightweight arm metal is fitted (step 6).

  In the present invention, the primary side distribution line is composed of a snow-prevention-type outdoor cross-linked polyethylene insulated electric wire, and a branch line branched from the primary side distribution line via a covered through connector is connected to the primary side switch. It is connected (claim 7).

  According to the above transformer room equipment, the transformer is arranged and fixed on the front side, and the support post is arranged and fixed on the rear side. Therefore, compared with the transformer room equipment assembled in a frame shape, Since the number of parts can be greatly reduced and the material cost can be greatly reduced, and the field work is reduced, the construction cost can be greatly reduced, and the total cost can be greatly reduced. And since there is no support | pillar in the near side, the workability | operativity at the time of construction and the maintenance workability | operativity are excellent.

  By using square struts for the struts, the square struts have a greater strength than round pipes, so the number of struts can be reduced, especially by eliminating the front struts, It becomes possible to install only in the rear part, the number of parts can be reduced, and material costs and construction costs can be reduced. In addition, compared to a round pipe, a square support is easy to mount rack hardware, support hardware, lightweight armor, etc. using its flat part, stabilizes its mounting posture, and increases mounting strength. be able to.

  In addition, since a plurality of levers are mounted in juxtaposition in the vertical direction on the upper portions of the plurality of support columns, a horizontal arm metal is not required for mounting the lever, so that the horizontal arm metal can be manufactured. Not only can the material cost be reduced, but also the work of attaching the horizontal arm metal to the support is unnecessary and the construction cost can be reduced, so the total cost can be reduced.

  In addition, the plurality of insulators are attached in parallel with each other in the vertical direction by attaching the plurality of insulators to the horizontal arm metal attached to the upper ends of the plurality of pillars in the horizontal direction. There is an advantage that construction is possible in a transformer room with a small ceiling height compared to the above.

  In addition, when attaching a horizontal arm bracket to a support | pillar in this way, it is good to comprise a base member, a support | pillar member, and a horizontal arm bracket which fix a support | pillar to a floor surface separately. In this way, when the base member, the support member, and the horizontal arm are configured separately, for example, the light arm used for the utility pole of the distribution line can be used as the support member, The GW brace C type can be used as the brace. By diverting such existing products, it is easier to procure materials and reduce material costs compared to the case of newly producing horizontal and lightweight arms.

  Further, by attaching the support hardware and / or the lightweight arm metal to the support column in a detachable manner with a square clamp and a presser fitting, compared to the case where the support hardware or the lightweight arm metal is welded to the support column, Without requiring a special device such as a welding device, installation work in a narrow transformer room is easy, and it is easy to deal with when changing the layout.

  Further, the presser fitting is formed so as to have a stepped shape with a concave portion into which the support metal fitting is fitted and a concave portion into which the light weight metal fitting is fitted. It can be shared for gold, and the types of presser fittings can be reduced. Not only can the material cost be reduced compared to the case of manufacturing separate presser fittings, but also the presser fittings Management becomes easier.

  Further, the primary side distribution line is constituted by a snow-prevention-type outdoor-use crosslinked polyethylene insulated wire, and a branch line branched from the primary side distribution line via a covered through connector is connected to the primary side switch. The connection work between the primary distribution line and the branch line can be done with a single touch by the coated through-type connector, and the connection can be made in a short time, so that the construction cost can be reduced.

Best mode for carrying out discovery

  Hereinafter, an embodiment of transformer room equipment of the present invention is described with reference to drawings.

  FIG. 1 is a schematic configuration perspective view of a horizontally arranged transformer room facility according to the first embodiment of the present invention. The concrete floor 1 of the transformer room is provided with a transformer room equipment installation section 2 that is one step higher. In this way, the transformer room equipment installation section 2 is provided one level higher on the floor surface 1 when rainwater or the like enters the transformer room, such as corrosion or leakage due to wetness of equipment such as the transformer. This is to prevent accidents.

On the front side of the transformer room facility installation section 2, four transformers 3 _{1 to} 3 ₄ are arranged in a horizontal row at a predetermined interval, and are fixed to the floor surface 1 by transkeepers _{4 1} to ₄ 4, respectively. ing. Of the four transformers 3 _{1 to} 3 ₄ , the left two transformers 3 ₁ and 3 ₂ are for 100V, for example, and the right two are for example 100V transformer 3 ₃ , 3 ₄ of the secondary winding are connected in series, thereby obtaining a 200V voltage with neutral.

The four pillars 5 _{1 to} 5 ₄ having a quadrangular cross section are arranged and fixed behind the transformers 3 _{1 to} 3 ₄ , and the intermediate part between the front side and the rear part of the right end is necessary. depending struts 5 ₅ is disposed fixed. For example, as shown in FIG. 2 (A), the columns 5 _{1 to} 5 ₅ are a base member 6 fixed to the transformer room facility installation unit 2 and a column member fitted and fixed to the base member 6. 7 and a horizontal brace 8 that is fixed to the upper end of the column member 7 and extends in the horizontal direction.

  As shown in FIG. 2B, the base member 6 has four L-shaped steel plates 6b arranged and fixed in a substantially rectangular tube shape at the center of the horizontal plate member 6a, and the outer surface of each steel plate 6b. Reinforcing members 6c are respectively fixed at positions deviated from the center line, and an appropriate number of anchor bolt mounting holes 6d are formed in the periphery of the horizontal plate member 6a. The anchor bolt mounting holes 6d The horizontal plate member 6a is fixed to the transformer room facility installation section 2 with anchor bolts (not shown). If the anchor bolt mounting hole 6d is formed in a long hole shape as shown in the drawing, the anchor driving operation is facilitated.

  As shown in FIG. 2 (C), the base portion of the column member 7 having a quadrangular cross section is inserted into the substantially quadrangular cylindrical portion formed by the four steel plates 6b of the horizontal plate member 6a. The steel plate 6b and the column member 7 are connected and fixed by bolts 6e and 6f at two places so as not to wobble. As shown in the drawing, the bolts 6e and 6f are preferably mounted in different 90 ° directions because the force applied to the column member 7 is distributed to the four steel plates 6b, but may be mounted in the same direction. As described above, the reinforcing member 6c is fixed at a position shifted from the center line of each steel plate 6b in order to attach the bolts 6e and 6f to the center line position of each steel plate 6b.

  The square support member 7 and / or the horizontal arm metal 8 may be newly manufactured. For example, a light arm of a power pole in an existing power distribution facility is used as the support member 7 and the horizontal arm metal 8 is used. Can use the GW brace C type. By doing so, compared to the case where the column member 7 and / or the horizontal arm 8 are newly manufactured, the material cost can be reduced, energy can be saved by effective use of resources, and environmental protection can be achieved. desirable.

  In addition, light weight rack hardware 9 is attached to the leftmost support column 51 among the support columns 5 at two midway portions in the height direction so as to extend to the front side in the horizontal direction. Three primary side distribution lines (high voltage bus bars) 10 are collectively raised and locked to the lightweight rack hardware 9. The primary side distribution line 10 is constituted by, for example, an edge-crosslinked polyethylene insulated wire used for an edge-around electric wire in a high-voltage and extra-high overhead wireway.

Wherein the horizontal cross-arm 8 attached to the upper end of each post 5 ₁ to 5 _5, respectively are fixed are three high-pressure pin insulators 11, by respective high-pressure pin insulators 11, the primary side of the three Three primary distribution lines (high-voltage busbars) 12 _{1 to} 12 ₃ made of a snowfall prevention type outdoor cross-linked polyethylene insulated electric wire connected to the distribution line 10 or the primary side distribution line 10 are installed.

Further, of the strut 5 ₁ to 5 _5, the intermediate portion of the height direction of the second strut 5 ₂ from the left end, rectangular tube-shaped indoor transformers PC support hardware in a horizontal direction (hereinafter, referred to as support fittings) 13 is attached. Further, a light-weight arm 14 having a rectangular tube shape is attached in the horizontal direction at a middle portion in the height direction of the columns 5 ₃ and 5 ₄ .

Installing a lightweight cross-arm 14 to the support 5 _second mounting support hardware 13 to an intermediate portion, and posts _3, 5 ₄ of middle part, may be by welding, it requires a welding device, the welding As described later, it is desirable to use a square clamp and a presser fitting so as to be detachable.

The support hardware 13 attached to the support 5 ₂ In this way, 100 V transformers 3 ₁ of the primary-side switch (PC = Primary cutout) 15 _1, 15 ₂ and the primary-side opening and closing of the transformer 3 ₂ Containers 15 ₃ and 15 ₄ are attached.

Further, a transformer 3 ₃ used as a 200V transformer by connecting two 100V transformers in series to the lightweight arm 14 attached to the middle part in the height direction of the columns 5 ₃ and 5 ₄ . , 3 ₄ , 3 pole interlocking primary side switches 16 ₁ , 16 ₂ , 16 ₃ are attached. This three-pole interlocking type primary side switch 16 ₁ , 16 ₂ , 16 ₃ is configured so that when one of them is shut off, it is also shut off in conjunction with the other two poles for safety. is there.

The primary distribution line 12, as described above, is composed of snow accretion prevention type outdoor cross-linked polyethylene insulated wire, coated feedthrough connector 17 _{1-17 4} by the connection branch connection line 18 _{1-18 4} Are connected to the primary side switches 15 ₁ to 15 ₄ . The branch lines 18 ₁ and 18 ₂ for the primary switches 15 ₁ and 15 ₂ for the transformer 3 ₁ are branched from the primary side distribution lines 12 ₁ and 12 _2, and the primary side switch for the transformer 3 ₂ . 15 _3, 15 ₄ for the branch line 18 _3, 18 ₄ is branched from the primary distribution line 12 _2, 12 _3.

As described above, the primary side distribution lines 12 ₁ , 12 ₂ , and 12 ₃ have branch lines 19 ₁ , 19 ₂ , and 19 _{3 that} are connected and branched by covered through connectors 17 ₅ , 17 ₆ , and 17 ₇ , respectively. It is connected to the pole interlocking type primary switch 16 ₁ , 16 ₂ , 16 ₃ .

The secondary distribution lines from the transformers 3 _{1 to} 3 ₂ are used as the 100 V power supply wiring for each consumer, and the 200 V secondary distribution lines from the transformers 3 _{3 to} 3 ₄ are shared. It is used as 200V power supply wiring for equipment such as elevators and water tank pumps.

According to the horizontal arrangement type transformer room facility having the above-described configuration, the plurality of transformers 3 _{1 to} 3 ₄ are arranged and fixed on the front side, and the plurality of columns 5 _{1 to} 5 ₄ are arranged and fixed on the rear side. Compared to a transformer room facility in which conventional round pipes are assembled in a frame shape, the total number of parts is reduced by about 40%, and material costs are greatly reduced. Moreover, since the support | pillar 5 does not exist in this side, not only the workability | operativity at the time of construction is excellent but the workability | operativity at the time of a maintenance is also good. Furthermore, there is no processing such as cutting of round pipes on site, construction work is simple, construction can be done in a short time of about 35% of the conventional time, and construction costs can be reduced, so the total cost is about 30% of the conventional cost. And can be greatly reduced. And since the support | pillar 5 is comprised by the base member 6, the support | pillar member 7, and the horizontal arm bracket 8, it is suitable when the ceiling height of a transformer room is small. In addition, when the ceiling height of a transformer room is still smaller, what is necessary is just to use the thing of suitable height (length) as the support | pillar member 7. FIG.

As described above, it is preferable to use the square clamp 20 and the presser fitting 23 as shown in FIG. 3 to fix the support metal 13 and the lightweight arm 14 to each of the columns 5 _{2 to} 5 ₄ . The square clamp 20 is formed with male screws 22 at the ends of both leg portions 21 a and 21 b of a U-shaped clamp body 21, and both the leg portions 21 a and 21 b are inserted into the holes of the presser fitting 23. 24 is screwed.

  As shown in FIGS. 4A and 4B, the presser fitting 23 has a U-shaped cross section having a bottom surface portion 25 and a raised portion 26 rising from both ends thereof, and extends along the length direction of the bottom surface portion 25. The long hole 27 and the round hole 28 and the semi-long hole 29 are continuously and integrally formed at a predetermined interval from the long hole 27. The widths of the long holes 27 and the half long holes 29 are formed to be slightly larger than the diameters of the leg portions 21 a and 21 b of the clamp body 21 of the square clamp 20. Therefore, the long hole 27 and the clamp body 21 of the square clamp 20 inserted through the round hole 28 can be slid in the horizontal direction and the vertical direction in the long hole 27 and the semi-long hole 29.

  Now, assuming that the height dimension H1 of the lightweight arm 14 and the height dimension H2 of the support metal 13 are H1> H2, the upright portions 26 and 26 of the presser fitting 23 are shown in FIG. As shown, a large recess 30a into which the lightweight arm 14 is fitted and a small recess 30b into which the support metal 13 is fitted are formed in a step shape.

  As shown in FIG. 5, the square clamp 20 and the presser fitting 23 are used as a pair, and one leg portion 21a of the clamp body 21 in the first square clamp 20A is used as the first presser fitting. 23A of the clamp body 21 of the second square clamp 20B is inserted into the round hole 28 of the first presser fitting 23A. Further, the other leg portion 21b of the clamp body 21 of the first square clamp 20A is inserted into the long hole 27 of the second presser fitting 23B, and the other leg portion 21b of the second square clamp 20B is inserted. The leg 21b is inserted through the round hole 28 of the second presser fitting 23B.

  The square clamps 20A and 20B and the presser fittings 23A and 23B are roughly attached to the column member 7, and the lightweight arm metal 14 or the support metal 13 is laterally disposed between the column member 7 and the presser fittings 23A and 23B. Next, the presser fittings 23A and 23B are moved vertically relative to the square clamps 20A and 20B, and the nut 24 is tightened, so that the light brace 14 or the support metal 13 is attached to the column member 7 alone. Can be easily installed.

  More specifically, as shown in FIG. 6A, a pair of square clamps 20A and 20B is used, and a column member 7 and a lightweight member are disposed between the square clamp bodies 21 and 21 and the presser fittings 23A and 23B. By tightening the nut 24 with the arm metal 14 in between, the lightweight arm metal 14 is fitted into the large concave portion 30a of the upright portions 26, 26 of the presser fittings 23A, 23B, and the lightweight arm metal 14 is firmly attached to the column member 7. And it can be detachably attached.

In addition, as shown in FIG. 6B, the square clamps 20A and 20B are made into one set,
By sandwiching the column member 7 and the support metal 13 between the square clamp main bodies 21 and 21 and the presser fittings 23A and 23B, and tightening the nut 24, the small concave portions of the upright portions 26 and 26 of the presser fittings 23A and 23B. The support metal fitting 13 is fitted into 30b, and the support metal fitting 13 can be firmly and detachably attached to the column member 7.

  In this way, by forming the large recesses 30a and small 30b in the stepped shape on the upright portions 26, 26 of the presser fitting 23, one type of presser fitting 23 can be used for the lightweight arm metal 14 having a different size. It can be shared with the support hardware 13.

  When the dimensions of the support metal 13 and the lightweight arm metal 14 are the same, if a single-sized recess 30 (not shown) is formed in the upright portions 26, 26 of the presser fitting 23, the recess 30 The support metal 13 or the lightweight arm 14 is fitted into the support member 7 and can be attached to the support member 7 firmly and detachably.

  As described above, when the support metal 13 and / or the lightweight arm metal 14 are detachably attached to the support 5 using the square clamp 20 and the presser fitting 23, the support 5 can be attached to the support 5 without using a welding device. The support metal 13 and the lightweight arm 14 can be easily attached by one person. In addition, unlike fixing by welding, when changing the layout of the transformer room equipment, the nut 24 can be loosened, and the square clamp 20 and the presser fitting 23 can be easily removed and reused over and over again. be able to.

  Arbitrary methods can be adopted for the connection between the primary distribution line 12 and the branch lines 18 and 19. FIG. 7 shows a configuration of a branch line connecting portion by the covered through connector 17 in FIG. That is, as the primary side distribution line 12, a snow-prevention-type outdoor cross-linked polyethylene insulated wire is adopted instead of the high-voltage edge-wrapping ethylene propylene rubber insulated wire. The branch line 18 and / or the branch line 19 are connected by an inexpensive coated through-type connector 17. The branch line 18 and / or the vicinity of the end of the branch line 19 are fixed to the primary distribution line 12 by the bind line 31, and the ends of the branch lines 18 and 19 are covered with an insulating cap 32.

  FIG. 8A shows a connecting portion between the primary distribution line 12 and the branch lines 18 and 19 by a C-type connector. In the case of the horizontal arrangement type, the primary side distribution line 12 made of a cross-linked polyethylene insulated wire for the periphery and the branch lines 18 and 19 are connected by the C-type connector 33, and the primary side distribution line 12 is turned by the high voltage pin insulator 11. In addition to binding with the binding wire 34, the primary distribution line 12 and the branch wires 18, 19 are connected with the bind wire 35, and the branch wires 18, 19 are fixed to the top of the high-voltage pin insulator 11 with the indoor transformer ceiling binding 36. is doing. In FIG. 8A, the insulating cap that covers the end of the primary side distribution line 12 is not visible behind the primary side distribution line 12.

  FIG. 9 is a schematic configuration perspective view of a vertically arranged transformer room facility according to the second embodiment of the present invention. The vertical arrangement type transformer room equipment of the second embodiment is common in many parts to the horizontal arrangement type transformer room equipment in the first embodiment shown in FIGS. Are given the same reference numerals and their description is omitted.

  In the vertical array type transformer room facility of the second embodiment, instead of the split-type support column 5 shown in FIGS. 1 to 2, an integrated support column 37 is used as shown in FIG. Is different. That is, as shown in FIG. 2, the split-type column 5 is composed of a base member 6, a column member 7, and a horizontal arm metal 8 made of different members and used in combination with bolts. The support 37 in the vertical array type transformer room facility is configured such that the base member 38, the support member 39, and the attachment member 40 of the high-voltage pin insulator 11 are integrally formed.

  As shown in FIG. 10B, the base member 38 has an elongated hole 38 a for attaching an anchor bolt, and the reinforcing member 41 is fixed to the base member 38 and the base portion of the column member 39. In the case of this vertical arrangement type transformer room equipment, unlike the case of the horizontal arrangement type transformer room equipment shown in FIG. 1, there is no need for a bolt for connecting the base member 6 and the column member 7. Can be fixed on the center line of each surface of the column-shaped column member 39.

  As described above, the horizontal arrangement type transformer room equipment is suitable for the case where the ceiling height of the transformer room is small by having the horizontal arm metal 8 which is the attachment portion of the high voltage pin insulator 11. When there is a margin in the ceiling height, it is desirable to use an integrated support column 37 as shown in the present embodiment. When such an integrated support column 37 is used, the total number of parts is reduced by about 45% as compared to the split type support column 5, and the material cost can be reduced. Work becomes unnecessary, construction of the transformer room facilities can be performed more easily and in a short time, and the construction cost can be greatly reduced to about 25% of the conventional one.

  Also in this vertically arranged transformer room facility, the connection between the primary side distribution line 12 and the branch lines 18 and 19 may be performed by employing a coated through-type connector 17, as shown in FIG. A C-type connector may be adopted. FIG. 8B shows a configuration of a connection portion between the primary distribution line 12 and the branch lines 18 and 19 in the case where the C-type connector 32 is adopted in the vertically arranged transformer room facility. In this case, the branch lines 18 and 19 are connected to the primary side distribution line 12 made of a cross-linked polyethylene insulated wire for the periphery by the C-type connector 33, and the primary side distribution line 12 and the branch lines 18 and 19 are connected by the bind line 41. Are connected. The primary distribution line 12 is turned by the high voltage pin insulator 11 and bound by the bind wire 42. The exposed ends of the branch lines 18 and 19 are covered with an insulating cap 43.

  In the first and second embodiments, specific configurations have been described. However, the present invention is not limited to these embodiments, and various modifications can be made without departing from the spirit of the present invention. It is.

  For example, in a horizontal array type transformer room facility, the base member and the column member may be integrated, or in a vertical array type transformer room facility, the column 37, the base member, the column member, and the high-voltage pin insulator. You may divide into an attachment member.

  In the above embodiment, the case where there are four transformers has been described. However, depending on the size of the middle- and high-rise collective home, the number of transformers installed may be three or less, or five or more. The same can be done.

It is a schematic structure perspective view of the horizontal arrangement type transformer room equipment concerning a 1st embodiment of the present invention. (A) is an exploded perspective view of a column in the transformer room facility of FIG. 1, (B) is an enlarged plan view of a base member of the column of (A), (C) is an enlarged front view of the base member of the column of (A) FIG. It is a front view of the square clamp used for this invention. (A) is a top view of the presser fitting used in the present invention, (B) is a front view of the presser fitting of (A), and (C) is a side view of the presser fitting of (A). It is a perspective view of the state which combined the square clamp and the presser fitting using two sets. (A) is a side view of a state in which a lightweight armrest is attached to a support using the presser fitting of FIG. 4, and (B) is a side view of a state in which a support metal is attached to the support using the presser fitting of FIG. . It is a top view of the state which connected the primary side distribution line and the branch line with the covering penetration type connector. (A) is a front view of a state in which a primary side distribution line and a branch line in a horizontal array type transformer room facility are connected by a C-type connector, and (B) is a primary side distribution line in a vertical array type transformer room facility. It is a front view of the state which connected with a branch line with the C-type connector. It is a schematic structure perspective view in the vertical arrangement type transformer room equipment concerning a 2nd embodiment of the present invention. (A) is a perspective view of the support | pillar in the vertical arrangement type transformer room equipment of FIG. 9, (B) is a top view of the support | pillar of (A).

Explanation of symbols

3, 3 _{1 to} 3 ₄ Transformer 5, 5 _{1 to} 5 ₅ Column 6 Base member 7 Column member 8 Horizontal arm 11 High voltage pin insulator 12, 12 _{1 to} 12 ₃ Primary side distribution line (high voltage bus)
13 support hardware 14 weight cross-arm 15 _{1-15 2} primary switch _{161-164 3} 3-pole ganged primary switch 17 coated feedthrough connector 18 _{1-18 4} 19 _{1-19 3} branch lines 20,20A , 20B Square clamp 23, 23A, 23B Presser bracket 24 Nut 30, 30a, 30b Recess 33 C-type connectors 37, 37 _{1 to} 37 ₄ struts

Claims (7)

In transformer room facilities equipped with a transformer that transforms from distribution line voltage to medium- and high-rise housing voltage,
Place and fix multiple transformers on the front side,
Place and fix a plurality of props on the rear side,
While arranging the primary side distribution lines via a plurality of insulators attached to the upper part of these columns,
A plurality of primary side switches are attached to a support metal and a light arm that are installed horizontally in the column,
A transformer room facility, wherein a branch line branched from the primary side distribution line is connected to the primary side switch. The transformer room facility according to claim 1, wherein the pillar is a square pillar. The transformer room facility according to claim 1, wherein the plurality of insulators are attached to upper portions of the plurality of support columns in parallel with each other in the vertical direction. The transformer room facility according to claim 1, wherein the plurality of insulators are attached in parallel to a horizontal arm metal attached to upper ends of the plurality of support columns, respectively. The transformer room facility according to claim 1, wherein the support hardware and / or the lightweight arm is detachably attached to the support column with a square clamp and a presser fitting. 6. The transformer room equipment according to claim 5, wherein the presser fitting has a concave portion into which the support metal fitting is fitted and a concave portion into which the lightweight arm metal is fitted in a step shape. The primary distribution line is composed of a snow-prevention-type outdoor cross-linked polyethylene insulated electric wire, and a branch line branched from the primary distribution line via a covered through connector is connected to the primary switch. The transformer room equipment according to claim 1, wherein the transformer room equipment is provided.