DE7401064U - Low-rise, medium-voltage network station made of precast concrete parts that can be lowered into the ground - Google Patents

Description

File number Kö 02 applicant:

Dipl.-Ing. Rudolf Koerber

^P Hi ^{01 5} Ϊ \ Ί 4 Düsseldorf 31.

G 74 01 064.3. Kesselsbergweg 13

Medium voltage that can be lowered into the ground made of precast concrete parts in low-rise construction

The invention relates to a medium-voltage network station made of precast concrete parts in low construction, which are lowered into the ground to various underground heights, a minimum of 80 cm can.

Another property is that it is maintenance-free due to its insensitivity of the live parts against dirt and moisture. The building blocks of medium "and low-voltage distribution, as well as the Transformer, as a closed unit with detachable connections, can easily be replaced. The built-in devices are also adaptable and light to the respective purpose of the station to replace.

The installation of network stations in metropolitan areas requires a compact, inconspicuous design that does not obstruct the view even in busy places. A building volume of less than 5 m ^ and Low construction height makes it easier to set up, as in most countries no building permit or building notice is required is and at street corners in the so-called "triangle of vision" partly construction heights a maximum of 80 cm must be provided.

Small stations made of sheet steel or plastic with prefabricated foundations are known ^{, which, however, exceed 5 m 3} above floor volume with the mostly required equipment with transformers up to 630 kVA. A greater floor height and volume are given by the arrangement of the devices. A low above-floor height could indeed be achieved in a so-called "low station", but the above floor volume is more than 5m ³ .

The object of the invention is to meet the above-mentioned requirements to meet variable requirements and to achieve a minimum floor height with a minimum floor volume.

This object is achieved according to the invention in that the concrete housing consists of a, preferably monolithic lower part 1 with an upwardly open box-shaped part, which is used to accommodate of the transformer 5 and is designed as an oil collecting pan, which on the longitudinal side has a chamber for the housing 6 of the Medium-voltage devices including their connections and on the narrow side a chamber for the housing 7 of the low-voltage distribution is placed in front of it, and that on four limited surfaces at the corner points

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'A roof element made of reinforced concrete 2a is placed on top, un4 that everyone Chamber in the cable section, shaft cover plates 3 made of concrete or plastic are in front of you.

The advantages achieved with the invention are in particular the following: Under normal conditions the station is buried approx. 1.0 m deep, with gie still remaining below the above floor volume of 5 m ³ , not obstructing the normal view and still easy to use in an upright position is. All that is needed to set up is to widen and deepen the normal cable trench and smooth out a bed of sand. If it is necessary to set it up in a triangular view, the station is only buried a little deeper (approx. 1.5 m, so that the above-floor height is 80 cm). Operation is then still possible in a slightly stooped position *

The station can be easily adapted to the respective requirements of the network expansion. For example, it can be used on the medium-voltage side as üso-called "single station" only with fastened on supports . Tabs or with tubular inserted in fuse bases

Plug connections, both exchangeable when de-energized, be equipped. But it can also be used in every cable entry or exit A switch disconnector of compact design (e.g. push switch or rotary switch disconnector), for the door to the formator outlet with an adjacent one High-voltage fuses, which trip the transformer switch on three poles, are arranged «

The total height of the station can be increased if transformers are used without expansion vessel (with nitrogen poister or expansion compensation by appropriately designing the cooling fins) can alternatively be reduced by approx. 30-40 cm. Only the upper one has to be used for this Mold half of the housing shape can be changed.

J In the following the invention is based on only one embodiment Illustrative drawing explained in more detail.

' It shows

Figure 1 shows an embodiment of the network station in horizontal section

ΐ Figure 2 shows a longitudinal section through the network station according to Figure 1

FIG. 3 shows a cross section through the network station according to FIG. 1

. in line of sight A-A

'Figure 4 is a partial front view of the network station according to Figure 1,

the left outer door and partly also the protective door and the cover of the cable connection part omitted

3, - was

FIG. 5 shows a cross section through the medium-voltage part. X Detail of the roof fastening

l. FIG. 6 shows a cross section through the low-voltage part

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Figure 7 is a front view of the medium-voltage housing without g doors, front cable cover plate and base part ^:

FIG. 8 a side view and a view from below of the medium-voltage housing

FIG. 9 bottom view of the cable tunnel with the 4 side views.

In the figures, a fully equipped network station made of precast concrete parts with exchangeable medium and low voltage housings and cable tunnel elements for pressure relief is shown.

The station housing consists of the monolithic lower part 1, the Roof element 2, which rests at points 4 on the lower part of the housing (this roof element can also consist of a cross-ribbed 2a provided plastic shell (Fig. 6)), as well as the shaft cover plates 3. (The transformer 5 is housed in the box-shaped part closed at the bottom). In the longitudinal and The medium-voltage housing and the low-voltage housing 7, both of which are completely closed, are placed in front of the shafts on the narrow side are used.

The ventilation of the station is done, as shown in Figure 2, according to the further invention so that a ventilation grille IO is inserted into the concrete housing lower part 1 on one aboveground narrow side, and ventilation slots 11 in the doors on the other narrow side in the low-voltage housing 7 and are disposed through the housing, an air passage 12, and that is guided% of supplied cooling air here with the aid of guide plates 13 made of galvanized sheet metal or plastic comparable% to below the transformer and j)

that for venting the guide plates 13 one in "* height of the upper one

Form half of the ventilation grille 10 leading channel, and that;

Recesses on the lower part of the roof element a ventilation gap 14 _?;

along the lower edge of the roof, which is marked by an inserted angle |

profil is made poke-proof. |

This is explained with reference to FIG. 2: A poke-proof ventilation grille 10, as well as ventilation slots 11 and air duct 12 in the low-voltage part 7 are used to ventilate the transformer. The exhaust air can escape through the upper half of the ventilation grille IO, as well as through air gaps 14 under the roof edges between the support points. This air gap is made poke-proof by an angle profile 15 q that is seldom used on all of them.

The housing for the devices are according to the further invention trained that the medium and low voltage devices and their Connections to each other in a cuboid, slide-in housing that is sealed against dirt and moisture

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box (6 or 7) made of corrosion-resistant sheet steel or plastic are housed, which is suspended in an angle rail 15 at the top at the front and is screwed and is supported with the rear wall on the partition wall to the transformer room, where it is via a C-profile is screwed. This is explained with reference to FIGS. 1 and 5

The medium voltage part consists of a retractable 2-part Box housing 6, made of galvanized sheet steel or plastic, possibly with an external guide layer. The housing takes in the upper part, side by side arranged, .the high-voltage switchgear, fuses I or connecting straps, as well as their connection with each other.

As can be seen from Figure 5, the top of the housing is in an angle profile 15 hung and screwed to this from the inside. The rear lower edge of the housing rests on the partition wall -zum Transformer on and is made with the help of a recessed C-profile screwed.

The cable connection is designed according to the further invention so that the respective cable feeders and their terminations in one; further, front and side downward and also sealed housings (19, 42; Fib. 3-5) are housed * the is flanged under the device housing (6 or 7), or that the housing box is made in one piece so that it is cuboid Upper part contains the devices and the cable connection in the lower part (19, 46; Fig. 7) which tapers downwards. To do this, the Fig. 3-5 and 7-8 explain:

There? Medium-voltage housing 6 can consist of 2 parts, namely device and cable connection part, the cable connection part with With the help of sealing strips it is pushed under the device box and screwed on. In other cases it can also be useful as shown in Figure 7 and 8 to choose a common housing for accommodating devices and cable connection. In both In this case, both the device part and the cable connection area are • sealed against the ingress of dirt and moisture in order to prevent the To make the station maintenance-free. In both cases it is also the lower transverse strip 26 of the device part and the front plate 19 and the bottom piece 27 designed to be removable, in order to connect to facilitate the cable.

The closures of the housings are designed according to the further invention so that the device housing has a door 30 at the front that hits sealing strips 29, the lower sealing strip being removable to facilitate the cable connection and that the cable connection housing has a removable front plate 19 for the same purpose. In addition, according to the further invention, the medium-voltage device housing 6 has, in addition to the outer door 30 which can be locked with a safety lock, a protective door 31 made of corrosion-resistant sheet steel closely behind it, which is provided with viewing windows 32 for observing the switch position, openings 33 for the actuating crank and with cam locks.

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It is shown in Fig. 4 and 5:

The upper part of the housing is through two doors 30, which in a sealing frame 29 a · -. beat s-ind, locked. The lower cross bar 26 of this frame and the front plate 19 of the cable connection part and the base 27 with the cable bushings are after loosening removable by wing screws to make it easier to connect the cables. Behind those doors is another one, no shown, closed with sash fasteners protective door 31 made of galvanized Sheet metal with viewing window 32 for safe observation of the Switching state and openings 33 for the passage of the hexagonal profile welded onto the switch actuating shaft 34.

The equipment of the housing with the devices is according to the further invention. that the medium voltage devices 37 and fuses 38 in a compact, open design, for example as a push switch, arranged side by side, by means of C-profiles 39 on the rear wall of the housing attached and connected by single-conductor plastic cables 43, 40 with one another. The switch is activated after further invention via a shaft 34 with a slip-on crank, which extends horizontally above the switch 37, and further via a Ball joint 36 and an adjustable, perpendicular? Linkage 35.

According to the further invention, power is supplied from the transformer 5 to the medium and low voltage part 6 and 7 via shielded single-conductor cable 42 with connectors 8 and 9, respectively on both sides on corresponding bushings in the transformer cover and are plugged into the rear walls of the device housing.

This is shown in Fig. 1, 4-8:

There are three openings in the upper left half of the rear wall of the housing 41 are provided, which wear the upper lower part of the three high-voltage fuses 38 and within the housing Continue towards the transformer room in three flexible single-conductor cables 42 with angled connectors 8. This makes a pluggable tight, externally earthed connection to the high-voltage bushings of the transformer established. Slide in normal, open Construction, but compact arrangement, provided switching devices (e.g. push switch) are on two C-profiles 39 next to each other attached to the rear wall and connected to one another via the upper terminal lugs with single-conductor cable pieces 43. You will -over a shaft 34 with attached hexagon on the upper door frame and is guided in the rear wall, operated by means of a crank. The shaft transmits the switching movement via an adjustable linkage 35 with ball joint 36 on the switching device 37. For safe operation there are two lockable with a safety lock behind the two End doors Two additional protective doors with viewing windows and openings for the actuating shafts are provided. For the Equipping a so-called single station, medium-voltage isolators can also be attached to the C-profiles instead of the switching devices wear the connecting straps. The equipment is also variable in other respects «For example, the transformer can only use

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; \ ^: "Fuses or can only be connected via a switch-disconnector without fuses $ . In these cases, an additional branch outlet can be accommodated.

Inlet and outlet cables are attached to a cable holding rail, not shown, which are adjustably attached to two C-profiles 45 of the cable connection housing 46, attached.

As can be seen from FIG. 8, there are various knockout openings 46 prepared in the base plate 27, as it enables alternatively · cables of different cross-sections and designs, in particular also make single-core cables watertight. A collar provided for this purpose is then covered with permanently elastic putty or j filled with a potting compound.

The low-voltage part is also housed in a closed, hot-dip galvanized sheet steel housing 7. It usually contains: about a Zuleitungsleistungs- or switch disconnectors, as well as fi screwed onto Sammelscbienen circuit strips up

8 low voltage outlets. The housing also has two rings provided around sealed lockable bags. These doors

■ have ventilation slots 11 in the lower part for the supply air of the

; ^; formators. This is guided through the low-voltage compartment with the aid of two plastic air ducts and with the aid of guide plates 13 in the transformer compartment to under the transformer.

In the upper right corner of the housing is the supply cable from the low-voltage connection of the transformer at the height of the upper one Connection of the supply line switch through the rear wall by means of a screw connection passed through. Here, too, a shielded cable with a plug is chosen to protect the transformer room in all To keep parts insensitive to moisture and dirt. Under the low-voltage distribution housing is in the same Way as in the with elimination of voltage part a cable connection housing, the can either be attached or a part with the rest of the housing forms. The front with the threshold strip of the door frame and the bottom part, all alternatively from one part, can be removed. The cables are passed tightly through the bottom part 27 with the aid of screw connections. The housing can be pushed in as a whole designed the concrete housing. It is attached to the rear of the transformer housing wall screwed into recessed C-profiles and hooked into an angle profile above the door frame. . ·

In the event of arcing faults in the medium voltage section irt the pressure relief downwards according to the further invention designed so that the front plates 19 of the cable connection housing Contain predetermined breaking points so that they can open against the manhole cover 3 and / or that a relief space in front the cable ducts along the cable route are created by tunnel elements 16 in front of them «,

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The pressure relief upwards is designed so that the upper housing cover plate 46 contains predetermined breaking points, and that the The station roof has so much freedom of movement with the help of guide bolts (21, Fib. 5) that the Lttfiangsspalt 14 can be lifted of the roof can increase significantly.

For this purpose, Fig. 1, 3 and 9 show:

To relieve pressure, tunnel pieces (Fig. 9, Fig. 1) 16 made of prefabricated concrete are used, which, as can be seen in more detail from Fig. 1, allow the further connection of commercially available concrete duct pieces 17, as indicated by dotted lines, in three directions _f unused openings are as also indicated in FIG. 1, closed by concrete slabs 18. As can be seen from FIG. 3, the downward pressure equalization is made possible by pressing the front plate 19 of the cable connection space. The pressure wave can then, without serious risk, equalize itself along the cable route into the cable trench.

For further pressure relief via the upper housing cover plate (Fig. 5) an expansion of the exhaust air gap 14 is made possible. For this purpose, at the four corner points in the cast threaded sockets 20 (Fig. 5) screwed in screw bolts 21, the offset head part 22 of which allows the roof to be raised by a few cm · For sealing an artificial

The threaded bushing 20 like another through bushing 23 is larger Diameter in the roof element, which is used to guide the bolt 21, are also used to attach appropriate transport eyelets to be able to screw in. This makes it easier to set up the station or to lift off the roof, if it is made of concrete / for replacing the transformer.

Claims (13)

/ 8 claims: 1. Medium-voltage network station made of precast concrete parts in a low-rise structure, which can be brought down to different above-ground heights, at least 80 -cm, by lowering it into the ground, characterized in that the concrete housing consists of a preferably monolithic lower part (i) with an upwardly open box-shaped part, which is used to accommodate the transformer (5) and as an oil pan is designed, the above ground on the long side a chamber for the housing (6} of the medium-voltage devices including their connections, and on the narrow side a chamber for the housing (7) of the low-voltage distribution is placed in front of it, and with a roof element made of reinforced concrete (2) or made of glass fiber reinforced plastic on four limited areas at the corner points Stiffening ribs (2a) is placed, and that each chamber in the cable part shaft cover plates (3) made of concrete or plastic are in front of you. 2. Station according to claim 1, characterized in that that for ventilation on one aboveground narrow side in the concrete housing lower part (1) a ventilation grille (10) is used that on the other narrow side in the low-voltage housing (7) ventilation slots (11) and an air duct (12) through the housing are arranged in the doors, and that the cooling air supplied from here with the help of guide plates (13) made of galvanized sheet metal or plastic to under the transformer to be led. 3. Station according to claim 2, characterized in that that for venting the guide plates (13) one in the height of the upper half of the ventilation grille (10) leading / 9 '02. '■■■' * «Form a channel, and that recesses in the lower part of the roof element £ Form a ventilation gap (14) along the lower edge of the roof, the is made poke-proof by an inserted angle profile. 4. Station by claim 3, characterized in that that the middle and leather tension devices and their connections one below the other in a cuboid, insertable and housing (6 and 7) made of corrosion-resistant steel or plastic, which is sealed against dirt and moisture are housed, the front above in an angle rail (15) ' is suspended and screwed and is supported with the rear wall on the partition wall to the transformer room, where it has a C-profile (28) is screwed. 5. Station according to claim 4, characterized in that that the respective cable feeds and their terminations in a further, front and side downwardly tapering and also sealed housing (19, 42; Fig. 3-5) which is flanged under the device housing (6 or 7). 6. Station according to claim 3 or 4, characterized that the housing box is made in one piece, so that it in the cuboid upper part, the devices and in downwardly tapering lower part (19, 46; Fig, 7) contains the cable connection. 7. Station according to claim 5 or 6, characterized in that the device housing in front one in sealing strips (29) has a knocking door (30), the lower sealing strip being removable to facilitate the cable connection is, and that the cable connection housing has a removable front panel (19) for the same purpose. 8. Station according to claim 7, characterized in that that the medium-voltage device housing (6) except with the Security lock lockable outer door (30) one close behind has a horizontal protective door {31) made of corrosion-resistant sheet steel / which has viewing windows (32) for observing the switch position, Openings (33) for the operating crank and with sash locks is provided. 9, station according to claim 7 or 8, characterized in that the medium-voltage switching devices (37) and Fuses (38) in a compact, open design, for example push switches, arranged next to one another, by means of C-profiles (39) attached to the rear wall of the housing and by single-conductor plastic cable (43, 40) are interconnected. 10. Station according to claim 9, characterized in that that the switch is operated via a shaft (34) with a slip-on crank, which is positioned horizontally above the switch (37) runs, and further via a ball joint (36) and an adjustable, vertically extending linkage (35). 11. Station according to claim 10, characterized z'eichn et that the power supply from the transformer (5) to the central. and low-voltage part (6 or 7) via shielded single-conductor | cable (42) with plug connectors (8 or 9), which are plugged on both sides on corresponding bushings in the transformer cover i and in the rear walls of the device housing. t 12. Station according to one of claims 9 to 11, characterized in that that in the event of <arcing faults in the medium voltage part for pressure relief after at the bottom the front plate (19) of the cable connection housing contains predetermined breaking points so that it rests against the manhole cover can fold, and / or that a discharge room in front of the cable ι • ♦ · / 11 02. shafts along the cable route through tunnel elements in front (16) is created. 13. Station according to claim 12 / characterized in that that the upper housing cover plate (46) contains predetermined breaking points for pressure relief upwards, and that the station roof with the help of guide bolts (21, Fig, 5) so much freedom of movement has that the ventilation gap (14) can increase significantly by lifting the roof.,