MOBILE NETWORK DISTRIBUTION SYSTEM

Description

[0001] The subject matter concerns a mobile network distribution system, in particular for a low-voltage electrical network.

[0002] In low-voltage electrical networks, faults occur irregularly and unpredictably, resulting in the disconnection of connected subscribers (loads and / or producers) from the network, preventing them from drawing or feeding in energy. In the event of a fault along a section of a low-voltage network, this fault is detected at the network interconnection point, and the section is isolated from the rest of the network. The subscribers on the affected section are de-energized, and repairs to the section are initiated.

[0003] Repairing a low-voltage line typically involves excavation work, as a large proportion of low-voltage networks, at least in urban areas, are buried underground, particularly in Germany. While this is generally unproblematic, it can occasionally lead to resource shortages.

[0004] In particular, maintenance crews must be kept on standby for such maintenance work. If several faults occur simultaneously, the available resources are insufficient. Faults at night, on weekends, or on public holidays are also problematic, as maintaining a maintenance standby force is extremely expensive. On the other hand, it is essential to resolve the fault as quickly as possible after it occurs. This is for two reasons. Firstly, it is unreasonable to expect customers to go without electricity for too long. Secondly, regulatory requirements often necessitate rapid fault resolution. The duration of a fault until its resolution can be relevant for penalty payments. Therefore, it is of paramount importance for the network operator to resolve faults as quickly as possible. For the reasons mentioned above, this is not always possible.Documents US 2011 / 188167 A1 and CN 203 553 683 U reveal a mobile network distribution system in this regard.

[0005] The underlying objective was therefore to provide a system that could flexibly and quickly provide initial power to participants in electrical energy networks after a fault has occurred.

[0006] This problem is solved by a mobile network distribution system according to claim 1. Further embodiments are defined in dependent claims 2 to 12.

[0007] The mobile network distribution system is specifically designed to provide electrical networks with capacities between 50 kVA and 800 kVA, preferably between 90 kVA and 650 kVA, particularly between 90 kVA and 400 kVA, and preferably between 250 kVA and 400 kVA. Typically, a low-voltage network is connected at the grid connection point to a higher network level, particularly a medium-voltage network, via a transformer. Transformers with capacities between 90 kVA and 650 kVA are used for this purpose, depending on the number of phases served by the transformer and the type of subscribers connected to those phases. Faults can occur along only one output phase of a transformer; that is, one phase may be faulty and disconnected, but the transformer itself may continue to function properly.A fault can also occur in or on the transformer, at the network connection point, or along all strands, rendering the transformer unusable.

[0008] In the first case, to rectify the fault, the subscribers of the faulty line can be connected to the existing transformer; however, this requires laying new cables along the faulty line. In the second case, the transformer can be replaced by an emergency power supply, such as a mobile generator, and new cables are laid along the lines starting from the emergency power supply.

[0009] To avoid the need for lengthy troubleshooting and construction work to rectify the fault, a mobile power distribution system is proposed, mounted on a trailer with at least one loading platform and one axle. The trailer can be single- or double-axle and connected to a towing vehicle via a trailer hitch. For example, the trailer can be directly coupled to the trailer hitch of a truck carrying the emergency power generator. Alternatively, the trailer can be coupled to any other vehicle, allowing it to be quickly and easily transported from the depot to the fault location.

[0010] To resolve a fault, it is not initially necessary to fix the fault itself, but rather to quickly reconnect the subscribers to the power grid. This can be achieved through temporary, above-ground cable installation, which is provided in a particularly flexible manner by the mobile trailer. The necessary equipment can be easily arranged on the trailer's loading platform to be prepared for various fault scenarios, different topologies, and required cable routing routes.

[0011] It is initially proposed that a connection panel with at least three single-phase input connections be provided on the loading platform. This connection panel allows the system to be connected to the emergency power generator or the existing transformer. A separate input connection is provided for each phase. In the case of a typical three-phase network, three connections are provided for phases L1, L2, and L3, as well as at least one connection for the combined or, if applicable, separate neutral conductor and / or the equipotential bonding conductor. Thus, in addition to the three phases, the connection panel can also have further input connections for the neutral conductor and / or the grounding conductor. The connection of the input terminals to the emergency power generator or the transformer is made using readily available, standard plug-in connectors.The network distribution system can therefore be easily and without problems connected to the still functioning transformer or network system at the location of the fault via the input connections using standard components.

[0012] For the distribution of electrical power, a distribution box is mounted on the loading platform. The distribution box has one input bay and at least two, preferably more than two, in particular six output bays. A second distribution box can also be mounted on the loading platform to increase the number of output bays; each output bay can be provided with a three-phase output connection. Thus, the network distribution system can supply a line with one or more subscribers via the output connections. The input bay is hardwired to the input terminals of the connection panel. A busbar can be provided for each phase, the neutral conductor, and / or the earth conductor, each of which is hardwired to one of the input terminals on the input bay. The output bays are connected to the respective busbars and each has a three-phase output connection on the output side.

[0013] To connect the output terminals to distribution cables, it is proposed that at least two connection consoles be mounted on the loading platform. These consoles can be mounted directly or indirectly on the loading platform. Each connection console is connected to the output terminals, with each console being connected to an output terminal of an output array, preferably by hardwiring. The connection consoles are preferably designed as plug-in connectors for distribution cables.

[0014] This system is characterized by its trailer mounting, allowing for mobility and easy transport to the service location as needed. The service technician dispatched to resolve the fault can simply connect distribution cables to the plug connectors and link them to the building's electrical connections. The distribution box provides protection for the output connections. The connection panel facilitates particularly easy installation to existing infrastructure such as a functioning transformer or emergency power generator. This network distribution system thus enables the service technician to quickly and easily restore power to subscribers after a fault via the distribution cables.

[0015] To connect multiple users, or users located remotely from the infrastructure, to the connection consoles, one embodiment proposes that at least one, and preferably multiple, distribution cables, configured as extension cables, be loosely stored on the loading platform. Distribution cables of varying lengths, for example 10 m, 25 m, 50 m, or similar, can be stored on the loading platform. The service technician can remove the distribution cables from the loading platform, connect them to the plug connectors of the connection consoles, and route them to the users. Chains of multiple distribution cables connected in series can also be used.

[0016] The distribution cables enable an above-ground connection of the network distribution system to the subscribers. These cables are conventional, rubber-sheathed cables with conductor cross-sections between 16 mm² and 25 mm². The distribution cables are terminated with plug-in connectors at the ends. They can be standard CEE extension cables with a rubber sheath. The distribution cables typically have five conductors for the phases L1, L2, L3, neutral (N), and earth.

[0017] The connectors are primarily CEE plugs, which are standardized and designed for currents exceeding 40A, specifically up to 63A. The connector on the terminal block is designed as a socket to accept the plug of a distribution cable. The various distribution cables allow the service technician to flexibly configure the wiring of the distribution system to the individual devices.

[0018] Especially with long cable lengths and given conductor cross-sections, it can be advantageous to store the cables on a cable drum on the trailer. It is therefore proposed that the distribution cables be stored on a cable drum, which can be mounted fixedly, swiveling, or loosely on the loading platform. A fixed or swiveling cable drum is coupled to the trailer, and the distribution cable can be unwound from the drum on the trailer. Loosely mounted cable drums are suitable for laying cables further away from the distribution system. The cable can be easily transported via the cable drum and laid wherever it is needed. The swiveling capability of the cable drum also allows for tight branching radii directly at the distribution system.

[0019] The power requirements of different users can vary. It is also possible that, starting from the distribution system at a connection point, an initial distribution cable runs to a sub-distribution panel, where further distribution to multiple users takes place. Due to these diverse power requirements for the cables, it is recommended that, for flexible deployment of the network distribution system, the distribution cables with different conductor cross-sections be stored loosely on the loading platform.

[0020] For the purposes of this application, "loosely stored" means that the components are stored on the trailer in a way that allows them to be removed. While the components may be secured for transport, they must be removable, particularly without tools. Loose storage can be achieved in boxes, cases, carriers, or by lashing or hooking. During transport, the components may be stored in a fixed location on the loading platform, but for use, they can then be removed from this location, particularly without tools, and taken off the loading platform.

[0021] In addition to various conductor cross-sections, the cables can also have different lengths, for example, 10 m, 25 m, and 50 m, allowing for flexible distribution in the fault area. Since the cables are intended to supply subscribers of a low-voltage network and may involve long cable runs with high power requirements, it is also proposed that the conductor cross-sections of the cables be 16 mm² or larger. In particular, the conductor cross-sections are between 16 mm² and 250 mm², preferably between 16 mm² and 35 mm². The cables have outer insulation. Individual conductors, each with its own insulation, are housed within this outer insulation, which can be made of rubber. The conductors can be solid core or stranded conductors and are preferably made of copper or copper alloys.When the term "conductor" is used in this context, it can refer to either the insulated conductor or the metallic core or strand. Both conductors and cables can also be shielded.

[0022] According to one embodiment, it is proposed that at least one connecting cable with a plug connector at its first end and stripped wire ends at its second end is loosely stored on the loading platform. For the final connection of the distribution system to the subscriber, an electrical connection is established, particularly at the subscriber's service entrance box or network connection point. The diversity of different network connection points, especially different service entrance boxes with their varying topologies and connection options, necessitates that the connecting cable for the final connection to the subscriber has stripped wire ends on one end. Depending on the requirements of the subscriber's network connection point, a ferrule, a lug, a bolt, or the like can be attached to these wire ends to establish a connection with the subscriber's network connection point.

[0023] As previously stated, a distribution box is provided on the network distribution system. This distribution box has one input bay and at least two output bays. To protect the emergency power system or the transformer from the distribution system, fuses can be provided at the input bay. To protect the connection bays from the distribution system and from each other, fuses can be provided at the respective connection bays. Specifically, it is planned that one fuse per phase is provided at the input bay. It is also planned that one fuse per phase is provided at each output bay.

[0024] Since, as already mentioned, participants may have very different performance requirements, a needs-based protection of the input and output fields is necessary for mobile, dynamic deployment in the event of a fault. To ensure this, it is proposed that a number of plug-in fuses, dimensioned for the input and / or output fields and with different fuse characteristics, be stored on the loading platform. The fuses are primarily standard fuses that can be plugged into sockets in the input and / or output fields. The fuses can have different fuse characteristics, in particular, they can exhibit a wide variety of tripping currents. Depending on the application, the appropriate fuse can then be inserted into the socket of the input field or one of the output fields, so that both the participant and the distribution system can be protected as required.

[0025] According to one embodiment, it is proposed that at least one mobile electrical sub-distribution board with at least one input and at least two outputs be loosely mounted on the loading platform. Both the input and the outputs can be designed as plug connectors for the distribution cables. The plug connectors are preferably standardized, in particular CEE connectors. It may be advantageous to branch off from the connection console on the loading platform to a sub-distribution board using a first distribution cable. From there, two or more distribution cables can then branch off from the outputs and be routed to the individual users.

[0026] It is specifically proposed that a first distribution cable be connected to the network distribution system, starting from the loading platform. At the end of at least this first distribution cable, the connection cable with the stripped wire end is then attached, via which the subscriber's network connection point is connected.

[0027] For connecting the network distribution system to a transformer or an emergency power generator, the input connections are equipped with plug-in connectors. The input connections are single-phase, and the plug-in connectors are standardized plug-in connectors specifically designed for this purpose. If connecting to an emergency power generator, this typically includes reelable cables with plug-in connectors that can be inserted into the input connections. If connecting to a functioning transformer, a separate reelable cable may be provided on the loading platform for each input connection.

[0028] The plug connectors on the input terminals, connection consoles, distribution cables, and / or distribution boxes can be protected against splashing water. These plug connectors are specifically standardized plug connectors, such as CEE plug connectors with IPXY with a minimum X=4 and a minimum Y≥4 according to DIN EN 60529 or ISO 20653. This ensures reliable fault suppression even over several days, as the plug connectors are protected against splashing water and therefore remain electrically safe even in damp environments and outdoors.

[0029] The distribution cable, with its stripped ends, is electrically connected to the subscriber's network connection point. This can be done by plugging it in, screwing it in, clamping it, or similar methods. The network connection point is usually electrically protected, for example, by a cover or similar device. This is particularly true in the case of a service entrance box. To establish contact for fault repair, such a cover must be removed and the distribution cable connected with its stripped ends. To ensure protection against accidental contact, especially during fault repair, it is recommended that at least one insulating cover for the service entrance box be stored loosely on the storage area. The service technician can then open the service entrance box, connect the cable, and subsequently cover the electrical contacts with the insulating cover to prevent accidental contact.

[0030] To protect the equipment on the trailer from environmental influences, it is proposed that the mobile trailer have fixed side walls that define the loading area. A rear side wall can also be pivotable, particularly around a horizontal axis, but also pivotable around two vertical axes. A cover can also be provided, which is likewise pivotable around a horizontal axis and can be attached to the side walls. Thus, the components on the trailer can be protected by the side walls and the cover.

[0031] Another advantageous feature is a measuring device that is electrically connected to the input and / or output fields. Such a device can be used to measure current and voltage. For example, current can be measured via cables using Rogowski coils integrated into the device. The device allows for the measurement of actual consumption or power flows during a fault. It can also be remotely readable, enabling continuous monitoring of power flows and the functionality of the distribution system during temporary troubleshooting.

[0032] To monitor the distribution system, it may also be possible to equip the trailer with a positioning device, in particular a GPS receiver, which can also be read remotely. This allows the position of the distribution system to be determined.

[0033] The subject matter is explained in more detail below with reference to a drawing showing an exemplary embodiment. The drawing shows: Fig. 1 shows a schematic diagram of a temporary distribution network that can be set up using a network distribution system; Fig. 2 shows a topology of a set up distribution network according to an embodiment; Fig. 3 shows a trailer according to an embodiment; Fig. 4 shows a fully equipped mobile trailer according to an embodiment; Fig. 5 shows a connection panel according to an embodiment; Fig. 6 shows a distribution box according to an embodiment; Fig. 7 shows a connection console according to an embodiment; Fig. 8 shows loosely mounted distribution cables according to an embodiment; Fig. 9 shows cable drums according to an embodiment; Fig. 10 shows a distribution box according to an embodiment; Fig. 11 shows a connection cable according to an embodiment.

[0034] Fig. 1Figure 1 shows two mobile distribution systems 2, each mounted on a trailer 4 and towed by a tractor 6. The two systems 2 can be used independently of each other and are shown twice for illustrative purposes only.

[0035] A system 2 can be electrically connected to an emergency power generator 8, as will be shown below. Alternatively, a system 2 can also be connected to a network connection point 10. Both configurations, with the emergency power generator 8 and with the network connection point 10, are connected to the input terminals of the systems 2. From the systems 2, subscribers 12 can be supplied with emergency power via distribution cables 14 to the electrical supply network. The cabling from the systems 2 to the subscribers 12 is provided via a variety of different distribution cables 14.

[0036] One possible topology is in Fig. 2As shown, a network fault has occurred in the schematically depicted network area. In this case, an emergency power generator 8 is deployed to the location together with a system 2. Subsequently, system 2 is connected to the emergency power generator 8 on one side and to the subscribers 12 on the other.

[0037] For the distribution of electrical energy to the subscribers 12, distribution cables 14 branch off from system 2 or are laid manually above ground. The distribution cables 14 can also be extended on their way from system 2 to the subscriber 12 by connecting them to each other via plug connectors 16. Furthermore, sub-distribution boards 18 can be provided, which are also connected to the distribution cables via plug connectors 16.

[0038] Starting from the sub-distribution boards 18 or directly from a plug connector 16, a connection cable 20 can be routed to the subscriber's network connection point. The connection cable 20 can have a plug connector 16 on one end, allowing it to be connected to the distribution cable 14. On the other end, the connection cable 20 can have exposed conductors, enabling an electrical connection to the house distribution box or another network connection point of the subscriber 12.

[0039] In the event of a fault, System 2 and the emergency power generator 8 are deployed to the site. The connection cables 20 are then connected to the service entrance boxes, and these boxes are connected to the output terminals of System 2 via the connectors 16 and the distribution cables 14. Simultaneously or subsequently, System 2 is connected to the emergency power generator. A distribution box within System 2 is fitted with the appropriate fuses. Once all cabling is complete, the emergency power generator 8 is switched on first, followed by the fuse in the distribution box of System 2, thus energizing the temporary power supply network and providing electricity to the subscribers 12.

[0040] System 2 is on a trailer 4, as in the Fig. 3The trailer 4 is shown assembled. It has a loading platform 22. Various components are mounted on the loading platform 22, either permanently or loosely, as will be described below. Three side walls 24 are preferably fixed to the loading platform, enclosing it. A fourth side wall 26 is pivotally attached to the loading platform 22 about a horizontal axis, allowing access to the loading platform 22 via this side wall 26. Doors and openings, as well as cable glands and connection consoles, in particular plug connectors, can be mounted in the side walls 24, enabling external access. Distribution cables 14 can be routed out of the side walls 24 and connected and laid as needed. A cover 28 can cover the system 2 from above.The loading platform 22 can be completely closed via the side walls 24, 26 and the lid 28, so that after the installation of the emergency power supply it can be closed and operated unattended without any danger to life and limb.

[0041] Fig. 4 Figure 2 schematically shows a loading platform 22 of a trailer 4 with the various components and without the side walls 24, 26 or the cover 28. The loading platform 22 is connected to a trailer coupling 32 via a drawbar 30 and can thus be connected to the tractor unit 6. The spatial arrangement of the components described here is purely exemplary and can, of course, be different. A connection panel 34 is provided on the input side of the system 2. The connection panel 34 can, for example, be configured according to the Fig. 5 be educated.

[0042] In the Fig. 5A double connection panel is shown, in which a single-core rubber cable 38 is provided on each cable drum 36 for connection to a network connection point. The cables 38 are all equipped with standardized plug connectors 39 and can thus be connected to the connection consoles of a network connection point without tools or with almost no tools. Alternatively or in addition to the cable drums 36 and cables 38, the connection panel 34 can also have permanently mounted plug connectors. In such a case, the corresponding emergency power supply system 8 with cable drum 36 and cable 38 can be connected as shown in Fig. 5 The system is described as being equipped accordingly, and thus, starting from the emergency power supply, system 2 can be connected to connection panel 34. The cables 38 of connection panel 34 are permanently wired to an input field of a junction box 40.

[0043] The junction box 40 is an example in Fig. 6 depicted.

[0044] The junction box 40 can be a standard junction box with a housing and a door for opening. On the input side, the junction box 40 can have an input panel 42. The cables 38 are each connected to one of the terminals of the input panel 42. From the input panel 42, a busbar is routed horizontally to output panels 44. At the terminals of the input panel 42 as well as the output panels 44, a socket for a plug-in fuse can be provided for each phase and each panel. From the fuses of the output panels 40, the individual phases are routed to three-phase output terminals 46. In the example shown, the junction box 40 has one input panel 42 and six output panels 44, and thus six output terminals 46. The output terminals 46 are connected to phases L1, L2, and L3 via the output panels 44.The output terminals are also connected to the neutral conductor and the earth conductor via busbars. In standby mode, i.e., when no emergency power supply has yet been established, the fuse holders of input bay 42 and output bay 44 are empty, but are designed to be fitted with standard fuses by simply inserting them.

[0045] The output terminals 46 are connected to connection consoles 50 on system 4, as Fig. 4 shows. For each of the output connections 46, six in the example shown, there is a connection console 50 as shown. Fig. 7 The connection console 50 is a standardized CEE socket, which allows a three-phase connection, including neutral and earth conductors, to a plug connector of a distribution cable.

[0046] In addition to the components permanently mounted on the loading platform 22, the loading platform 22 provides storage space for loosely stored additional components. First, after wiring, the fuses must be inserted into the junction box 40. A storage box 52 is provided on the loading platform 22 for storing fuses with various fuse characteristics. The fuses can be stored here, preferably sorted by fuse characteristic or rated value.

[0047] In addition to the fuse, it is necessary to connect 50 distribution cables from the connection consoles. These distribution cables can be stored in a box 54. Distribution cables are, in particular, standard cables 14, such as those found in Fig. 8The cables shown are equipped with standardized plugs and sockets at their ends. For example, these cables could be 14 five-core cables with conductor cross-sections of 16 mm². The cables can be rubber-sheathed, and the connectors can be splash-proof. The cables can also be shielded.

[0048] To unroll the distribution cables 14, either directly from the loading platform 22 or to a distant location, cable drums 56 are used, as shown in the Fig. 9 shown, each equipped with one or more of the distribution cables 14 stored on the loading platform 22.

[0049] Furthermore, a sub-distribution board 58, as in the Fig. 10 shown on the loading platform 22, loosely stored. The sub-distributor 58 has one input for connection with a distribution cable 14 and two or more outputs for connection with a distribution cable 14.

[0050] For the final connection of a distribution cable to a house distribution box, connection cables 60, as described in [reference missing], can be used. Fig. 11 The cables 60 are shown stored on loading platform 22. One end of each cable has a plug connector for connection to the distribution cables 14. The other end of the plug connector is stripped so that the cables 60 can be connected to a house distribution box. Depending on the requirements of the house distribution box, the stripped ends can be fitted with eyelets, ferrules, or similar fittings.

[0051] Additionally, but not shown, a position module, such as a GPS module, a GLONASS module, a Galileo module or the like, may be mounted on the loading platform 22, which is particularly remotely readable and makes the position of the system 2 determinable.

[0052] Furthermore, a measuring device (not shown) can be connected to the input field 42 and / or one or more phases of the output field 44, with which the power flows on the individual phases and / or the individual output terminals 46 and / or the input terminals can be measured in emergency operation. This allows monitoring and evaluation of the emergency system.

[0053] One or more protective covers 62 may also be provided on the loading platform 22, which serve to protect an open house connection box or other network connection point at a subscriber.

[0054] In the event of a malfunction, system 2 is attached to a tractor unit 6 using the trailer coupling 2 and moved to the location of the malfunction. If an emergency power generator 8 is required, it can also be moved there.

[0055] The connection cables 60 are electrically connected to the service entrance boxes of the subscribers 12 by first disconnecting the faulty network previously connected to the service entrance box and then connecting the individual phases, the neutral conductor, and the earth conductor. The connection cables 60 are then optionally connected via the sub-distribution board 58 and via at least one distribution cable 14 to the connection terminals 40. On the input side, the emergency power generator 8 is connected to the input panel 42 of the service entrance box 40 via the cables 38. Fuses are inserted and switched on as needed in the input panel 42 and in the required output panels 44. After this, the network is provisionally set up and the subscribers 12 are supplied with power. Reference symbol list

[0056] 2 System 4 Trailer 6 Tractor 8 Emergency power system 10 Grid connection point 12 Subscriber 14 Distribution cable 16 Plug coupling 18 Sub-distribution panel 20 Connection cable 22 Loading area 24, 26 Side wall 28 Cover 30 Drawbar 32 Trailer coupling 34 Connection panel 36 Cable drum 38 Cable 40 Junction box 42 Input panel 44 Output panel 46 Output connection 50 Connection console 52 Storage box 54 Storage box 56 Cable drum 58 Sub-distribution panel 60 Connection cable 62 Fuse

Claims

1. Mobile power grid distribution system comprising - a mobile trailer (4) with at least one axle and a loading area (22), - a connection panel (34) mounted on the loading area (22) with at least three single-phase input connections, - at least one distribution box connected to the respective input terminals via an input panel (42) and connected to at least two output panels (44), each with at least two at least three-phase output terminals (46), characterized in - that at least two connection consoles (50), each of which is connected to the output terminals (46), are arranged as plug couplings (16) for distribution cables (14), and - that the input panel (42) is hard-wired to the input terminals of the connection panel (44), - that a busbar is provided for each phase, which is hard-wired to one of the input terminals at the input panel (42), and - that the output panels (44) are coupled to the respective busbars and each have the three-phase output terminal on the output side.

2. Mobile power grid distribution system according to claim 1, characterized in - that at least one, preferably a plurality of distribution cables (14) formed as extension cables are loosely stored on the loading area (22).

3. Mobile power grid distribution system according to claim 1 or 2, characterized in - that the distribution cables (14) are stored on a cable drum (56), wherein the cable drum is stored fixedly, pivotably fixedly, or loosely on the loading area (22).

4. Mobile power grid distribution system according to claim 1 or 2, characterized in - that the distribution cables (14) have a conductor cross-section of at least 16 mm2 and / or that distribution cables with different conductor cross-sections and / or cable lengths are loosely loaded on the loading area (22).

5. Mobile power grid distribution system according to one of the preceding claims, characterized in - that at least one connection cable (20) with a plug coupling (16) at its first end and stripped wire ends at its second end is loosely stored on the loading area (22).

6. Mobile power grid distribution system according to one of the preceding claims, characterized in - that a plurality of plug fuses, dimensioned for the input panel (42) and / or the output panel (44), with different fuse characteristics are stored on the loading area (22) and.

7. Mobile power grid distribution system according to one of the preceding claims, characterized in - that at least one mobile electrical sub-distribution board (58) with at least one input and at least two outputs is loosely mounted on the loading area (22), wherein the input and the outputs are formed as plug couplings (16) for the distribution cables.

8. Mobile power grid distribution system according to one of the preceding claims, characterized in - that the input connections have plug couplings (16), wherein the input connections are formed as rollable cables (38) or as connection consoles (50) permanently mounted on the loading area (22).

9. Mobile power grid distribution system according to one of the preceding claims, characterized in that the plug couplings are formed in accordance with IPXY, where X=at least 4 and Y>= 4, in accordance with DIN EN 60529 or ISO 20653.

10. Mobile power grid distribution system according to one of the preceding claims, characterized in - that at least one insulation cover for a house connection box is loosely stored on the loading area (22).

11. Mobile power grid distribution system according to one of the preceding claims, characterized in that the mobile trailer (4) has at least three fixed side walls (24, 26) delimiting the loading area (22) and / or the mobile trailer (4) has at least one side wall that can be pivoted about a horizontal axis and / or a cover (28) that can be pivoted about a horizontal axis, or vertically pivoting doors.

12. Mobile power grid distribution system according to one of the preceding claims, characterized in that a V / I measuring device is connected to the input panel (42) and / or at least one output panel (44), in particular that the measuring device can be read remotely.