KR102627712B1 - Energy distribution arrangement for the electrical supply of reefer containers - Google Patents

Abstract

The present invention relates to an energy distribution device for an electric refrigerated container, the energy distribution device comprising a housing comprising a first opening and a second opening separating an interior space from the environment, a power socket, and a first section, a second section and a first connection device comprising a flange section between the first section and the second section. The invention also relates to a connection device for the electrical supply of a refrigerated container, the connection device comprising a first section, a second section and a flange section between the first section and the second section.

Description

Energy distribution arrangement for the electrical supply of reefer containers}

The present invention relates to an energy distribution device for electrical supply of a refrigerated container comprising a housing that separates the interior space from the environment, the housing comprising a first opening and a second opening, the energy distribution device comprising a power socket and It further includes a first connection device comprising a first section, a second section and a flange section between the first section and the second section.

The present invention also relates to a connecting device for electrically connecting a power socket in a housing for electrical supply of a refrigerated container, the connecting device being provided between a first section and a second section and between the first section and the second section. Includes flange section.

Refrigerated containers are used to transport corrosive materials that require temperature-controlled transport, such as fruit, meat, vegetables, dairy products and other temperature-sensitive cargo that needs to be cooled or kept refrigerated during transport by sea or land. . To ensure an uninterrupted cold chain, refrigerated containers contain an integrated cooling unit and therefore rely on an external power source. Whenever such refrigerated containers are to be transported or stored, they need to be connected to a power source by cables. Electrical energy is provided from a power source installed on board the container ship or on land or at the wharf. Typically such cooling units are connected to a three-phase system. When such refrigerated containers are transported across countries, the global standard IEC 60309 applies for matching plugs and socket-outlets.

A single 40-foot refrigerated container has a power input of up to 15 kW, which needs to be supplied by a three-phase power source, where the refrigerated container is typically connected to a 440V grid, rarely to a 250V grid. Load currents greater than 15 A require cables with sufficiently large wire cross-sections.

In particular, when boarding a shipping vessel and on the dock, a large number of refrigerated containers need to be packed densely and supplied with electrical energy. Total power consumption quickly rises to hundreds of kilowatts, which must be distributed by special distribution infrastructure and provided to refrigerated containers on shipping vessels or land sites to ensure cooling of cargo.

Typically, the cooling container is connected via power plugs and electrical cables to an electrical distribution device. Such an electrical distribution device may include a plurality of power sockets, each power socket connected to a power plug of an electrical cable to supply energy to one cooling container via the cable. A power socket is understood as an electrical power point for a separable electrical connection with a power plug. In particular, standardized power plugs and power sockets, such as standardized three-phase current plugs and sockets, are employed in applications on board shipping vessels, enabling the handling of such connections in international maritime trade. The main purpose of the energy distribution device according to the present invention is to utilize the energy supply of refrigerated containers when mounted on ships, but other consumption, for example, energy supply at the engine room or dock side of refrigerated containers, or energy supply of multiple consumptions are required and/ Alternatively, it can also be used for energy supply in onshore applications in other conditions where a compact configuration is required.

These specific requirements associated with such energy distribution give rise to problems associated with the installation of the distribution infrastructure. First, in some applications, a single, two or three power sockets are needed to supply energy to a corresponding number of containers. However, in other applications, in order to avoid the need for long cables to connect the container to the distribution infrastructure, a plurality of three or more, for example five, ten or Requires 10 or more power sockets. Since there are usually multiple locations on board the ship or at the dock, it is not advisable for power sockets to be installed in individually designed infrastructure elements in order to reduce installation and maintenance costs.

Another problem associated with such energy distribution devices lies in the generation of significant forces acting on the connecting cables and sockets in addition to the additional electrical connections utilized in such distribution infrastructure during use or installation. In order to provide safety for personnel handling electrical connections or working in close proximity to these electrical connections, the distribution infrastructure must be provided in the process of loading and unloading additional containers with respect to the longitudinal axis of the cable and to ensure that the electrical connections are supplied via power sockets. It must be able to withstand the radial forces that frequently occur during installation of the connection.

As an additional problem, due to the high load currents, the cables and wires are rather stiff and their manipulation during the installation of the electrical connection is therefore rather difficult. Moreover, significant axial and radial forces can be transmitted through such rigid cables and wires. Additionally, the accessibility of connection sites for installing electrical connections of such wires and cables is an essential feature, and distribution infrastructure should therefore be designed so that electrical connections can be easily installed and disconnected by individuals.

Each time a refrigerated container is loaded or unloaded, dock or ship operators need to manually connect or disconnect cables from power sockets mounted on the refrigerated container and the energy distribution device. Therefore, quickly operable plugs and sockets are used to reliably connect the refrigerated container to the power source. As containers are loaded and unloaded in all weather conditions, crews and dock workers need to be protected from being injured by electric shock. In this regard, specific power sockets have been developed that improve safety against electrical hazards. Such a power socket is known from DE202012005279U1, KR20130135105 or CN103457114A. Here, a container socket, a switch-type socket used to supply energy to refrigerated containers for ships, is disclosed. A circuit breaker is placed inside the socket. From DE 19706358 A1, a circuit breaker operating device used for power supply of refrigerated containers at sea is known. EP 1766731 B1 and DE 10 2013209726 disclose socket devices that address this safety issue, wherein a power switch is coupled to the socket and activated by a plug inserted into the socket.

The object of the present invention is to provide an improved energy distribution device for electric refrigerated containers of the type described above, which improves the variability and meets the electrical and mechanical requirements described above.

This object is achieved by an energy distribution device for electric refrigerated containers, said energy distribution device comprising:

- a housing separating an interior space from the environment and comprising a first opening and a second opening,

- power socket, and

- a first connection device comprising a first section, a second section and a flange section between the first section and the second section,

- the first section has first electrical connection means adapted to be electrically connected to the cable, the second section has second electrical connection means, said first and second electrical connection means via the flange section. They are electrically interconnected using extending conductive elements,

The first connection device is mounted to the housing using the flange section, partially penetrating a first opening of the housing, such that the first section of the first connection device is located outside the housing, the second section of the first connection device is located inside the housing,

The power socket is mounted in the second opening of the housing, and

The second electrical connection means is electrically connected to the power socket through an electrical connection inside the housing.

The energy distribution device is understood as a device that distributes energy that is sourced by an energy source and distributed to at least one power socket by the energy distribution device, and the refrigerated container is connected to the power socket through a cable using a plug.

A housing is understood as a box, case or seal that separates an internal space from an external space. A housing in the sense of the invention may also be an electrical cabinet or switchbox. The housing can be sealed against dust, water and seawater, and preferably provides a high degree of water and dust protection, such as IP65 according to the IEC 60529 standard. A housing can be understood as a wall or a wall section of a building or ship superstructure.

A cable is understood as at least two wires running in parallel, joined, twisted or twisted together to form a single assembly. The stripped wire ends of the cable can be connected by connecting means, enabling transfer of electrical energy from the energy source or energy distribution grid to the energy distribution device. The cable is particularly preferably understood as a three-phase cable, also known as a three-phase power cable, and is used to transfer energy in a three-phase power system. In particular, three-phase cables listed in the IEC 60309 standard and connected to connectors with supply voltages ranging between 100 V and 680 V and load currents ranging from 16 A to 125 A are within the scope of the invention.

Since strong currents are conducted by the wires, the wires of the cable have a large cross-section. This again results in a stiff wire, making the cable strong and inflexible. Cables may be laid in the lower part of the ship or below deck, and may appear close to the energy distribution device. For example, cables may appear in the environment directly below or close to the installation location of the energy distribution device. If the cable does not appear below the energy distribution device, the inflexible cable cannot be bent sufficiently to reach the energy distribution device, making connection of the wires difficult or impossible. In other cases, it may be difficult to properly connect the wire to the connecting means, for example because the wire and the connecting means connected thereto are under mechanical stress. Particularly if inflexible cables and stiff wires need to be connected inside the energy distribution device, it is difficult to connect the wires to the connection means due to the limited space available within the housing of the energy distribution device. Excessive axial and radial loads on the connection points between cables and energy distribution devices can lead to such conditions.

The invention is based on the perception that the installation operation of the energy distribution device can be significantly simplified if the electrical connection of the cable to the wire is made outside the housing and if said electrical connection is also maintained outside the housing after installation. When a ship is manufactured in a shipyard, one stage of construction is the installation of a power grid, which also includes the installation of energy distribution for the supply of refrigerated containers by means of an energy distribution device.

Here the connecting device is mounted on the housing so that the first section of the connecting device comprising the first connecting means is outside the housing, so that the accessibility of the first connecting means is significantly improved. Therefore, it is possible to connect a three-phase cable to the energy distribution device without opening the housing of the energy distribution device to connect the wires of the cable. Additionally, removal of the connecting device for installation of the wires of the cable may not be necessary. Such an integrated energy distribution device has the advantage that it can be mounted on the power grid in a time-saving manner.

In addition to the advantages described above, the present invention provides additional advantages.

Since the energy distribution device can be pre-assembled according to the shipyard's wiring plans, it is possible to fully equip the housing with the power socket and connection devices during such pre-assembly. Since the openings have the same shape, there are no restrictions on mounting single or multiple connection devices and power sockets. Therefore, the mounting position can be freely selected. This provides great flexibility when planning, manufacturing and locally installing energy distribution devices for the electrical supply of refrigerated containers. When installing the energy distribution device after its pre-assembly, there is no need to open the housing and the energy supply can be connected via the first electrical connection means in the first section of the connection device. This makes installation on the ship's sign easier and the wiring inside the housing tends to be less damaged.

As another advantage of the invention, the housing of the energy distribution device can be reduced in size since the three-phase cable is electrically connected to the energy distribution device external to the housing, so that when determining the dimensions of the housing, the cable and its wires can be There is no need to consider loop dimensions or radius of curvature.

Prior art energy distribution devices must have specific dimensions to be able to connect the stiff wires of the three-phase cable inside the housing. Since the wires of a three-phase cable conduct high voltages, for example more than 380 V and high currents, for example more than 10 A or more than 30 A, the wires have a large cable cross-section, which makes the cable stiff and has a large minimum bending radius. Due to the large radius of curvature, the housing of the energy distribution device needs to provide sufficient free space inside the housing to be able to occupy at least the curves or loops of the wires of the three-phase cable and connect them to the connecting means.

According to the invention, the space required for the connection means and for the routing of the wires can be moved from the interior space of the housing to the exterior of the housing, so that housing space can be saved. Under normal conditions, there is sufficient free space on the outside of the housing to carry out the routing of rigid wires and rigid cables, especially long enough to carry out the routing of stiff wires and rigid cables. Three-phase cables suitable for high load currents and therefore with large wire cross-sections can also be connected to the energy distribution device without the need to adjust or expand the dimensions of the housing of the energy distribution device. On the one hand, the present invention has the advantage that the housing can be made smaller and thus material and space can be saved. On the other hand, the uniformity of housing sizes for multiple applications thus reduces product variety, which in turn simplifies warehousing, reduces storage costs and allows high variability of mounting arrangements of such uniform housings. .

wherein the first section includes a casing adapted to be mounted on the flange section, enclosing the first electrical connection means and comprising an opening opposite the flange section for inserting the cable into the casing. It is particularly preferred that the flange section is adapted to receive the casing, the casing being able to protect the present-bearing wire or connecting means from damage by objects that may accidentally come into contact with the wire or connecting means. Moreover, if the uncoated wire-ends of the connecting means and cable are completely or partially covered or shielded, the risk of a short circuit can be significantly reduced. Moreover, the casing significantly increases electrical stability and significantly reduces the risk of harm to people by electric shock since direct contact with live parts is prevented by the casing.

Energy distribution devices for refrigerated containers are exposed to sea water, rain and dust. Therefore, it is particularly desirable that the internal space of the casing is sealed against ingress of moisture or dust. Thereby, the first electrical connecting means is protected against moisture, preventing corrosion and preventing defects and short circuits in the connecting means.

Sealing may be used to seal the interface between the flange section and the casing. Such sealing may be selected from a sealing ring, flat seal, sealing tape or any other type of sealing capable of sealing the interface between the flange section and the casing. Materials used for such sealing may include rubber, plastic, silicone, epoxy resin or adhesive materials. It is particularly preferred that the sealing material is a thermoplastic elastomer. The sealing may be positioned at the contact surface of the flange section and the casing.

It is further preferred for the sealing to be molded on or within the casing and/or flange section. The sealing can be produced by techniques such as injection molding or in particular two-part injection molding, known as 2C injection molding. In such cases, the casing may be formed by a rigid component, such as Acrylonitrile butadiene styrene (ABS), and the sealing may be formed by a soft component, such as a thermoplastic elastomer, such as copolyesters (TPE-E), TPE-A. (polyether block amides), TPU (thermoplastic polyurethane), or polysiloxane. A sealing is molded into or within the casing and/or flange section and bonded to the casing or flange section respectively, whereby the sealing is prevented from being lost or damaged during installation or maintenance procedures, thereby improving reliability. It can be.

It is desirable that the casing, especially the sealing, provide protection against dust and water ingress in accordance with the IEC 60529 standard, which classifies and evaluates the provided level of protection of the enclosure. The casing of the energy distribution device for the supply of refrigerated containers preferably has an IP65 rating and is thus dust-tight (first digit) and also protected against powerful ultra-high pressure water jets (second digit). However, the casing may also have a lower rating, such as IP64 or a higher rating, such as IP66 or IP68.

The opening through which the cable is guided into the casing preferably includes a sealing against the cable to prevent dust and moisture from entering through the opening when the cable is inserted. This embodiment may include a cable gland including the sealing.

The casing extends along a longitudinal axis perpendicular to the plane of the first opening, the casing having axial movement along the longitudinal axis of the first connection device, radial or combined radial-axial movement about the longitudinal axis. , or mounted on the flange section by a combined axial and rotational movement along the longitudinal axis of the first connecting device. The longitudinal axis will be understood as the axis extending from the first section of the connecting device through the flange section to the second section of the connecting device. Preferably, the longitudinal axis is perpendicular to a plane and the flange section is mounted on the housing of the energy distribution device, the plane corresponding to the plane of the first opening. Alternatively, the longitudinal axis may be an axis perpendicular to and centered on the flange section.

The casing can be mounted to the flange section from within the first section by axial movement of the casing. For example, the casing and flange sections may include special clips or springs that may engage each other. Alternatively, the flange section and the casing are adapted to be connected to each other by a combined axial and rotational movement respectively about the longitudinal axis, such as a screw or bayonet connection. For example, the flange section may include external threads and the casing may include internal threads, or vice versa. Therefore, the casing can be connected by a screwable mount which allows the casing to be removed whenever necessary. This may be advantageous, for example, when maintenance is to be performed on the connection means or when a damaged casing needs to be replaced. When screwing the casing, a sealing ring, for example a sealing ring or a flat sealing, can be placed on or inside the spherical ring element and/or flange section.

The above-mentioned connection may preferably be a separable connection. For example, it is desirable to provide a separable but not removable connection to prevent loosening or unauthorized removal of the casing. Additionally, non-separable connections, such as integral connections, can be made using adhesives or by engaging elements such as locking clips.

The casing includes first and second casing elements, the first and second casing elements being in sealing engagement with each other and forming a sealing engagement with the flange. A casing with two casing elements can be mounted with little or no axial movement of the casing elements along the longitudinal axis of the connection device defined above. Mounting can therefore occur from movement in any direction, radial or oblique, perpendicular to the longitudinal axis of the connecting device. For example, the first and second casing elements are implemented as two half-shells assembled together and completely or partially surround the connector flange of the flange section. This may be advantageous when installing the casing when there is no or very little space for moving the casing along the longitudinal axis of the connecting device in order to mount the wire to the first connecting means with access to the electrical connection. If the connection device of the energy distribution device and the cables connected to the connection device are not straight, it may be impossible to properly mount the casing. In such conditions, screwable casings often cannot be mounted because the external and internal threads cannot be properly aligned with respect to each other.

The casing includes first and second casing elements, the first and second casing elements being sealingly coupled to each other and forming a sealing coupling to the flange. For the advantages, embodiment versions and details of such sealing, reference is made to the above description relating to sealing between casing and flange sections.

- the first casing element is fixed to the flange section and the second casing element is fixed to the first casing, or

- the first casing element is fixed to the flange section and the second casing element is fixed to the flange section, or

- It is further preferred that the first casing element is fixed to the flange section and the second casing element is fixed to the flange section and to the first casing element.

It may be advantageous to connect the first casing element to the flange section so that the first casing element is fixed and the second casing element is then connected to the first casing element, for example a lid. In such a case, the individual fastening of the second casing element to the flange section can be omitted. Alternatively, both the first and second casing elements may be mounted or secured to the flange section but not individually secured to each other. Alternatively, it is preferred for the first casing element to be secured to the flange section and the second casing element to provide a mechanically strong interconnection and sealing between the first and second casing elements and the flange section.

It is further preferred that the first casing element and the flange section form an integral part.

For example, the first casing element may extend from the flange section to surround the first connection means. This may be advantageous when connecting the second casing element, as the electrician does not have to hold the two casing elements with his hands and can easily mount the second casing element to the fixed first casing element, which is integral with the flange. .

The casing is swivel-mounted to the flange section, preferably a joint ball joint joining the flange section and the casing.

A swivel mounting connection to the flange section of the casing may be advantageous as it provides the possibility of mounting in an inclined orientation to the flange section of the casing. Such an inclined attachment may be necessary, for example, if the connecting device of the energy distribution device and the cable to be connected to the connecting device are not straight or have mismatched positions or angles. In these cases, forces can be applied against the casing, which renders the sealing between the flange section and the casing ineffective, and a risk of breakage may arise if a stiff, non-swivelable connection is implemented. Those mechanical stresses induced by the forces acting on the material of the connection device and/or the material of the casing can be avoided by means of a swivel-mounted connection, which in turn can prevent disruption due to breakage and, therefore, of the energy distribution device. Increase service life.

Another advantage is that dimensional deviations in the assembly position of the housing of the energy distribution device and the position of the cables where they are laid or emerge from underground or below deck can be compensated for, thereby simplifying installation.

The swivel-mounted connection may be implemented by a joint ball joint allowing movement about a center of rotation. Therefore, the casing may form a hollow ring element with sections having a spherical inner or outer shape. The flange section may include sections with compensating spherical outer and inner shapes with a radius essentially equal to the inner radius of the casing. The casing, when mounted, surrounds a section of the flange section having a spherical external shape of the flange section. Therefore, the casing is fixed with respect to longitudinal movement with respect to the flange, but due to the fastening of the convex-concave spherical shape, the casing can perform tilting movements with respect to the flange.

A seal may preferably be provided between the flange section and the casing, which may preferably be a ring seal mounted on the flange section or in a circumferential recess of the flange section.

For advantageous functions and embodiments of such sealing, reference is made to the above description of sealing between casing and flange sections.

Preferably, the energy distribution device further comprises an adapter element adapted to be mounted between the flange section and the casing.

Such an adapter element may be advantageous if, for example, the connection device comprising a threaded flange section is pre-assembled into the energy distribution device, but the casing may be mounted at an angle to compensate for deviations in the mounting position during the installation procedure. There is a need. Deviation from the mounting position may occur if the orientation of the casing and cable do not match. Next, adapter elements can be used to compensate for the mismatch, thus enabling a simple and fast installation process. The adapter element may in particular provide angular compensation or compensation for the cable and its radial shift.

Preferably, the length of the casing is greater than the diameter or maximum width of the cross-section of the casing. The specific length of the casing ensures that the casing provides sufficient space to keep the procedure of mounting the wires of the cable to the connecting means simple when installing the energy distribution device. The ship operator can therefore install the casing manually by applying sufficient torque using his or her hands without special tools. Another advantage of a certain length of casing is that sufficient length is provided to compensate for misalignment of the cables and the connection devices of the energy distribution device.

Because the wire is stiff, bending it to achieve the desired position is in most cases impossible or very difficult. A casing having a length greater than the diameter or maximum dimension of the cross-section of the casing is therefore advantageous to provide sufficient space for the wire inside the casing.

More preferably, the cable inserted through the opening of the casing has a first minimum radius of curvature, the wires of the cable have a second minimum radius of curvature, and the casing has a first minimum curvature along its longitudinal axis. and/or the casing has a length of 0.1 to 5 times the second minimum radius of curvature along its longitudinal axis. The length of the casing may depend on the minimum bend radius of the cable because the radius of bend affects the amount of space required to place the cable within the angle device. Since the radius of curvature is a cable's figure of merit, the size of the casing can be related to the radius of curvature. The same applies to the radius of curvature of the wires of cables such as three-phase cables. Often, the minimum radius of curvature of a cable or wire may be determined to be each 15 times the diameter of the cable or wire.

More preferably, the energy distribution device further includes a valve unit configured to connect an internal space of the casing and an external space outside the casing and to compensate for an air pressure difference between the internal and external spaces of the casing. Since the energy distribution device is connected to high pressure, it is desirable to prevent moisture from condensing in the internal space. Therefore, the valve unit performs pressure equalization between the internal space of the casing and the environment, minimizing the risk of condensate within the casing. Therefore, the durability of the connecting means covered by the casing is increased, and electrical failure is prevented.

More preferably, the casing comprises a fixture that secures the cable to the casing to stabilize the first electrical connection means from mechanical pressure induced by a force applied to the cable. Whenever there is a force applied to the cable, the wires of the cable that are mechanically and electrically connected to the connecting means may lose or break their contact with the conductive elements. This will result in failure of the energy distribution device. Therefore, the connecting device can be adapted to provide strain-relief of the connecting means by securing the cable to the casing. For example, the cable gland may be an integral part of the casing or may be fixed, for example screwed, to the casing. When a cable passes through such a cable gland, the wire mechanically connected to the connecting means is free from mechanical forces. In particular, such a strain relief fixture can be mounted on an opening in the casing through which the cable is inserted, and can also have a sealing effect to seal said opening when the cable is inserted.

More preferably, the first electrical connection means comprises a plurality of connectors, and a separating element made of electrically insulating material is disposed between each two adjacent connectors.

Disconnecting elements improve electrical safety as they prevent unintentional connections between adjacent connecting means of the connecting device. To make the cables more flexible and reduce their bending radius, the wires are made up of several connectors. However, during the installation procedure, a single conductor may not be gripped by the connecting means and may protrude and possibly come into contact with an adjacent connecting means, resulting in an electrical failure. The separating element mechanically prevents a single or multiple conductors of the wire from coming into contact with adjacent connecting means or the wire as separating element forms a mechanical barrier between two adjacent connecting means. A separating element can be understood as a safety cover, protective shield, safety shield or as a plate or panel made of plastic material mounted on or extending from the connecting device between two adjacent connecting means.

Other advantages are that the clearance distance and creepage distance are increased and the insulation barrier is improved, which ultimately prevents flashover between two adjacent connection means.

More preferably, the first and/or second electrical connection means comprise screw terminals, clamping terminals, solder cups or welding plates.

In general, different connection means may be used for the connection means, and some may be more suitable than others in certain applications. For example, if clamping terminals are used, the wires can be connected in an easy and time-saving manner since no tools or cable lugs are required when connecting the wires to the clamping terminals. Alternatively, screw terminals provide a mechanically durable connection. When connecting wires, you will need common tools, such as a screwdriver or spanner. Solder cups or welding plates provide the most durable connection for wires, and these connection types require special tools.

More preferably, the power socket has a length in the axial direction of the power socket, and the depth of the housing in the axial direction is less than 1.5 times the length of the power socket in the axial direction. The depth of the housing is understood to be the dimension in the direction of the longitudinal axis of the connecting device. Preferably, the power socket has a longitudinal axis parallel to the longitudinal axis of the connecting device. Since the first connection means of the connection device lies outside the housing of the energy distribution device, the depth of the housing can be reduced. According to the present invention, the minimum depth of the housing is basically determined by the length of the power socket mounted on the housing. In general, it is necessary to provide additional space in the housing of the energy distribution device for the wiring of the power socket and the second connection means of the connection device. In this respect, a depth of less than twice the length of the power socket is sufficient to enclose the second connection means of the connecting device, the power socket and the wiring thereto. Since the size of the housing can thereby be reduced, housing materials such as metal or plastic can be saved and costs can be reduced. Alternatively, instead of the housing having a depth corresponding to less than twice the length of the power socket, the depth of the housing may be less than the length of the connection device along the longitudinal axis, preferably 75% of this length. It can be smaller than

More preferably, the housing includes a third opening, a second connecting device is mounted in the third opening, the second connecting device is configured according to the first connecting device, and the second connecting device The second electrical connection means is electrically connected to the second electrical connection means of the first connection device within the housing.

When installing an energy distribution device for electrical supply of refrigerated containers, it may be necessary to provide a method of sub-distribution of energy to additional energy distribution devices in order to provide a complete infrastructure for supplying a plurality of refrigerated containers. Therefore, the housing may include two connecting devices electrically connected to each other within the housing. One of the connecting devices may be directly connected to a source of energy and serves to supply energy to a power socket installed in the housing, and the other connecting device serves to branch energy from the first connecting device to be connected to another consumer device, e.g. For example, it supplies this branch of energy to a power socket installed in another housing. In this regard, the energy distribution device may comprise a second housing having a power socket and a third connection device installed therein, where a cable loop connects the second and third connection devices to the exterior of the housing. As a result, a complete infrastructure can be built by housing connected in series.

The advantage of such an infrastructure is that it can be built from uniform or standardized housing to form the energy distribution device. Two, three or more such housings can be electrically connected to each other to provide a desired number of power sockets. This ultimately reduces the complexity of design, installation and maintenance. Additionally, economies of scale apply to such modular installation of housing, thus reducing the cost per unit.

More preferably,

- the first housing has a first abutment opening in a side wall of the housing,

- a second housing is disposed adjacent to the side wall,

- the second housing has a second abutment opening adjacent to the first abutment opening of the first housing,

An electrical conductor extends through the first and second junction openings to establish an electrical connection between a power socket mounted in the first housing and a power socket mounted in the second housing.

The side wall of the housing is understood as a wall different from the wall comprising the first and second openings, which are understood to be provided in the front wall of the housing. Preferably, the side walls are oriented perpendicular to the front wall. Two or more housings of the energy distribution device are mechanically connected to each other or to a common platform, forming a common unit. The advantage of such a device is that a large number of power sockets can be provided at the installation site and supplied by a single power line. This provides additional flexibility if the infrastructure is planned to provide electrical supply to refrigerated containers. Therefore, it is possible to adapt the energy distribution device to the actual local environment or to the needs of technical or special conditions.

Preferably, the two housings can be fastened to each other by means of a common screw having a large diameter, for example on the order of tens of millimeters to one hundred millimeters, mounted in the first and second abutment openings. Thus the two housings may for example have corresponding abutment openings in the side walls and the common screw may be positioned in such a way that part of the thread protrudes from the inside of one or both housings. A single nut or nuts are screwed on the common screw to mount the two housings to each other. The cable may pass through a common screw to be used to electrically connect the power socket of the second housing and the second connection means of the connection device of the first housing.

Instead of a common screw with a large diameter, a plurality of screws may be arranged around the adjoining opening of the two housings and pass through corresponding fixing holes located in the two side walls of the housings.

More preferably, a third connection device is mounted in the connection opening of any one of the first and second housings instead of the power socket, the third connection device is configured according to the first connection device, and the third connection device is configured according to the first connection device. The first electrical connection means of the connecting device is electrically connected to the first electrical connecting means of the first or second connecting device. Whenever two housings of an energy distribution device are combined to provide a large number of power sockets in one place, a connecting device is mounted in one of the openings of the interconnected housings. These additional connection devices sub-distribute the energy to additional energy distribution devices. Therefore, energy can be transferred to the next or downstream energy distribution device. Therefore, more complex infrastructures can be implemented to adapt to the local environment or technical or special conditions when installed in shipyards, docks or land sites.

According to another aspect of the invention, the above-described object is solved by a connecting device for the electrical supply of a refrigerated container, the connecting device comprising:

- 1st section and 2nd section; and

- a flange section between the first section and the second section, wherein the flange section is adapted to be secured to the housing adjacent an opening in the housing, wherein the first section is adapted to be electrically connected to a cable. and a first electrical connection means, wherein the second section has a second electrical connection means, the first and second electrical connection means being electrically interconnected using a conductive element extending through the flange section. .

A preferred embodiment of the connection device may include the features and functionality of the connection device described above as part of an energy distribution device.

Preferred embodiments of the invention are explained by way of example and with reference to the drawings.
1 is a three-dimensional diagram of an energy distribution device.
Figure 2 is a three-dimensional view of an energy distribution device with an unscrewed casing.
Figure 3 is a detailed three-dimensional view of the first section of the connecting device.
Figure 4 is a three-dimensional diagram of a second embodiment of the energy distribution device.
Figure 5 is a three-dimensional view of a second embodiment of the energy distribution device with the housing lid and half shell removed.
Figure 6 is a detailed three-dimensional view of the energy distribution device according to the second embodiment with the housing lid and half shell casing removed.
Figure 7 is a front view of the energy distribution device according to the second embodiment, showing the casing with an inclined orientation.
Figure 8 is a detailed front view of the first section and the flange section of the connecting device.
9A to 9C are illustrations of mounting positions of the connection device in a housing with five openings.
Figure 10 is a three-dimensional view of two housings connected together including one connecting device.
Figure 11 is a three-dimensional view of two housings connected together comprising two connecting devices.
Figure 12 is a schematic diagram of possible housings a)-e) and their preferred combinations f)-l) of the energy distribution device.
Figure 13 is a schematic cross-sectional view of two interconnected housings of the energy distribution device according to the invention.

A first embodiment of an energy distribution device 100 is shown in Figures 1-3. Housing 110 includes a removable lid 112 and a front plate having four openings, where three power sockets 180 are mounted in three of the four openings. The connection device has a first section 140 located external to the housing. The first section is adjacent to the flange section 123 and the connecting device is mounted to the fourth opening by screws attached to this flange section 123 and the front plate adjacent to the fourth opening of the housing 110.

The flange section comprises an external thread 124 circumscribing the first connection means 120 formed by the screw terminal 125 . These screw terminals are integral with a conductive element 130 extending through the flange section. The wire 152 of the three-phase cable 150 is bound to the screw terminal and electrically connected to the screw terminal through the cable lug 153 at the end of each cable. The wires of the three-phase cable can thus be connected to the energy distribution device without removing the lid 112 of the housing 110 .

The casing 141 has internal threads in its inner peripheral wall and is screwed into the threads 124. The first section 140 further includes a cable gland 142 at the opposite end of the internal thread. The cable stopper 142 is coupled to the casing 141. The cable gland includes a seal that engages the outer perimeter of the cable to protect the screw terminal 125, wire 152 and conductive element 130 from water, moisture and dust. The cable stopper further includes a strain relief to relieve mechanical deformation of the three-phase cable 250 and each wire 252. To provide electrical energy to the energy distribution device 100, a three-phase cable 150 is connected to an energy supply (not shown).

Figure 2 shows the casing 141 of the connecting device unscrewed from the thread 124 to provide access to the screw terminal 125, wire 152 and conductive element 130. As can be seen from Figure 2, the casing 141 is unscrewed and moves axially along the cable 150 and, if sufficiently shorted in the axial direction, allows the access to the first connecting means 120.

Figure 3 shows three-dimensional details of the first connection means 120 and the flange section 123. A separating element 127 is placed between two adjacent conductor elements 130 and between the screw terminal 125 respectively.

4 to 8 show a second embodiment of the energy distribution device according to the invention. Figure 4 shows a housing 210 including a removable housing lid 212 and a front plate having four openings, with three power sockets 280 mounted on three of the four openings. The connection device has a first section 240 adjacent to the flange section 223 . The connection device is mounted to the fourth opening by screws attached to the flange section 223 and the front plate adjacent to the fourth opening. The first section 240 of the connection device is located outside the housing 210 and includes first connection means 220, casings 241, 241a, casing screws 244 and cable plugs 242.

Figures 5 and 6 show the energy distribution device of Figure 4 with the housing lid 212 removed. The first connecting means 220 of the connecting device is located outside the housing 210, and the wire 252 of the three-phase cable 250 is connected to the screw terminal of the first connecting means 220 by the cable lug 253. Connected to (225). The screw terminal 225 is connected to a conductive element 230. A separating element 225 is positioned between any two adjacent conductor elements 230 and the screw terminals 225 connected thereto.

A second section of the connecting device is located inside the housing 210 and includes second connecting means 260 . A screw terminal 266 is mounted on the conductive element 230. Isolating elements 268 are positioned between any two adjacent conductor elements 230 and screw terminals 266, respectively. A wire (not shown) connects to screw terminal 266 to provide electrical connection to power socket 280 within housing 210.

According to this embodiment, the flange section includes an outer spherical ring-shaped surface that constitutes the bearing surface of the ball joint bearing 224. The casing 241 is implemented as two joinable casing half shells, where only the first casing half shell 241a is shown in FIGS. 5 and 6 . Half shells 241a, b include internal bearing surfaces 224a, b at one end mounted on ring-shaped surface 224. When the two half shells are joined, they are secured to the spherical ring-element 224 of the flange section, thus forming a ball joint. Alternatively, the half shell may be secured directly to the flange section 223.

The casing 241 is frictionally fastened to the flange section from axial movement along the axis of the cable 250 when the half shells are interconnected by screws 244 . The cable stopper 242 is fastened to the casing 241 by, for example, screwing or clipping. The internal space of the casing 241 includes a screw terminal 225, a wire 252, and a conductive element 230. The internal space includes a casing seal located within the casing sealing recess 243 to resist ingress of water and dust, a sealing located within the sealing recess 229 of the spherical ring element 224, and a cable plug. It is sealed by the sealing provided by (242). The cable stopper further includes a strain relief to relieve mechanical deformation of the three-phase cable 250 and each wire 252.

Casings 241a, b are longer than casing 141, providing easier access to the first connection means, allowing connection and handling of somewhat stiffer cables with stiffer wires than in the first embodiment. Due to the increased length of the casing 241a, b, access to the first connection means cannot be provided by axial movement of the casing along the cable in the installation device. Instead, one or both half shells 141a, b of the casing may be removed radially in this embodiment.

Figure 7 shows a front view of the energy distribution device 200. The longitudinal axis 290 of the three-phase cable 300 and the longitudinal axis 291 of the flange section of the connection device are not straight and exhibit an angular mismatch (α). Whenever the housing 210 of the energy distribution device 200 is mounted in such a way that the connectors of the cable 250 to be connected to the energy distribution device and the connector are not straight or have a positional or angular mismatch, such angular mismatch may occur. there is. As the spherical ring-shaped surface 224 of the flange section forms a swivel-mount with the casing 241, the casing compensates for the angle mismatch α and simplifies the installation procedure of the casing 241. It can be mounted at a certain angle orientation.

Figure 8 shows a detailed view of the flange section 223 and the first connecting means 220 of the connecting device. The spherical ring-shaped surface 224 is shaped similarly to a ball joint section. The curved inner surface 224a of the casing 241 contacts the spherical ring-shaped surface 224 and is formed complementary to the spherical ring-shaped surface 224. This allows the casing to be mounted in an inclined orientation to compensate for the angular mismatch (α). A sealing recess 229 is provided circumferentially within the spherical ring-shaped surface 224. The sealing recess 229 comprises a sealing ring or a spherical ring-shaped surface 224, for example by two-part injection molding, to provide a seal between the half shell of the casing 241 and the flange section. ) may include a sealing component that is molded.

9a to 9c show several options for mounting the connection device according to the first embodiment of the invention on the housing of the energy distribution device.

The housing has five openings, and four power sockets are mounted in four of the five openings.

Figure 9a shows the energy distribution device 300, with the connection device mounted in the leftmost opening.

Figure 9b shows an energy distribution device 310, with a connecting device mounted in the central opening.

Figure 9c shows the energy distribution device 320, with the connection device mounted in the rightmost opening.

Without limitation, the connecting device may be mounted in the other two openings not shown in FIGS. 9A-9C. Additionally, this example is not limited to the connecting device of the first embodiment. Without limitation, the connecting device according to the second embodiment may be used instead.

10 and 11 show energy distribution devices 400 and 500 providing an increased number of power sockets.

10 shows an energy distribution device 400 having a first housing 410 and a second housing 420. The first and second housings 410, 420 are interconnected to each other at side walls. The housing 410 includes a front plate with six openings, and five power sockets are mounted in five of the six openings. A connecting device 401 according to a second embodiment of the present invention is mounted in the sixth opening. Housing 420 includes a front plate with six openings, and six power sockets are mounted in the six openings.

The power socket of the housing 410 is electrically connected to the connection device 401 within the housing 410. The power socket mounted on housing 420 is also connected to a connection device 401 within housing 410. Housings 410 and 420 include corresponding abutment openings in side walls that contact between housings 410 and 420. Next, a wire passes through the connection opening to provide an electrical connection between the connection device 401 and the power socket mounted on the housing 420. The connection device 401 may be connected to a power source by a cable (not shown).

Figure 11 shows a modified energy distribution device 500, essentially similar to the energy distribution device 400 shown in Figure 4, with first and second housings 510, 520 interconnected. The difference is that the energy distribution device 500 has two connection devices: a first connection device 501 mounted in an opening in the front plate of the first housing 510 and a first connection device 501 mounted in an opening in the front plate of the second housing 520. It includes a second connection device 502.

While the connection device 501 may be connected to a power source by a cable (not shown), the connection device 502 may be used to sub-distribute energy to another energy distribution device (not shown) via a cable. In another arrangement, the two connecting devices 501 and 502 may be moved to the first housing 510 or the second housing 520 .

The examples shown in FIGS. 10 and 11 are not limited to the connecting device of the second embodiment of the present invention, and the connecting device of the first embodiment may be used instead.

Figures 12 a) to 12l) schematically show preferred combinations of interconnected housings of combined energy distribution devices from a modular system according to the invention. 12 a) to 12 e) show an energy distribution device having 1 to 6 openings in the front plate of the housing, wherein the connection device is exemplarily mounted on the leftmost opening of the housing, and the power socket is located in the remaining openings. is mounted on Figures 12 f) to 12 k) show a preferred combination of first and second housings interconnected at the side walls to provide an energy distribution device with a larger number of power sockets. The entire power socket is electrically interconnected within the housing of the energy distribution device. Therefore, when two of the housings of the energy distribution device shown in FIGS. 12 a) to 12 e) are combined, 6 to 11 power sockets can be provided.

Figure 12 l) shows first and second housings being interconnected, wherein the first and second housings are electrically interconnected via a cable disposed outside the housing via a cable connected via a connection device to each of the housings. . This example can also be applied to the energy distribution device shown in FIGS. 12f) to 12k).

13 shows an exemplary cross-section of the mechanical interconnection of two housings 710, 711 of the energy distribution device 700. The two housings 710 and 711 have adjoining openings 712 and 713 on their side walls. Basically, a hollow screw 720 having a somewhat smaller diameter than the abutment openings 712 and 713 is inserted into the abutment opening of the first and second housings 710, 711 and is pulled out from within the housings 710, 711, for example. It is fastened by two hexagonal nuts 730. When the nut is tightened, the side wall of the housing exerts a force on the sealing ring 740, which is located between the two side walls and circumscribes the screw 720 and radially outward from the screw. Therefore, sealing of the cavity screw 720 and the abutment openings 712 and 713 is provided, and ingress of moisture, water and dust into the internal space of the housings 710 and 711 is prevented.

Figure 13 is to be understood as an example of a method of interconnecting two housings together and is not intended to limit the invention to the proposed solution shown in this figure. For example, it is not necessary to use a common screw. Alternatively, a plurality of screws may be disposed around the abutment opening and feed through corresponding fastening holes located in the two side walls of the housings 710, 711.

Claims (37)

An energy distribution device for electric refrigerated containers, adapted to distribute a load current of three-phase high voltage greater than 10 A, said load current of three-phase high voltage requiring a cable with a sufficient wire cross-section, comprising:
- a housing separating an interior space from the environment and comprising a first opening and a second opening,
- a power socket, understood as an electrical power point for a detachable electrical connection with a power plug, and
- a first connection device comprising a first section, a second section and a flange section between the first section and the second section,
- the first section 140 has first electrical connection means 120 adapted to be electrically connected to a cable, and the second section has second electrical connection means, said first and second electrical connection means are electrically interconnected using conductive elements extending through the flange section,
The first connection device is mounted to the housing using the flange section, partially penetrating a first opening of the housing, such that the first section of the first connection device is located outside the housing, the second section of the first connection device is located inside the housing,
The power socket is mounted in the second opening of the housing, and
The second electrical connection means is electrically connected to the power socket through an electrical connection inside the housing,
The first section 140 comprises a casing, which provides protection against ingress of dust and water in accordance with the IEC 60529 standard and has a rating of at least IP66, thus being dust-tight and also resistant to ultra-high pressure water jets. protected against,
The first electrical connection means comprises a plurality of connectors, wherein a separating element made of electrically insulating material is disposed between each two adjacent connectors, and/or
said second electrical connection means comprising a plurality of connectors, wherein a separating element made of electrically insulating material is disposed between each two adjacent connectors;
The first and/or second electrical connection means include screw terminals, clamping terminals, solder cups or welding plates,
An energy distribution device that prevents flashover between two adjacent connection means by increasing the clearance distance and creepage distance and improving the insulation barrier. In claim 1,
The first section includes a casing, the casing comprising:
- is designed to be mounted on the flange section,
- surrounding said first electrical connection means, and also
- an opening opposite the flange section for inserting the cable into the casing, the flange section being adapted to receive the casing. In claim 2,
the casing extends along a longitudinal axis perpendicular to the plane of the first opening, the casing
- axial movement along the longitudinal axis of said first connecting device,
- radial or combined radial-axial movement about said longitudinal axis, or
- combined axial and rotational movement along the longitudinal axis of the first connecting device
An energy distribution device, which is mounted on the flange section by. In claim 2,
wherein the casing includes first and second casing elements, the first and second casing elements being sealingly coupled to each other and forming a sealing coupling to the flange. In claim 4,
- the first casing element is fixed to the flange section and the second casing element is fixed to the first casing element, or
- the first casing element is fixed to the flange section and the second casing element is fixed to the flange section, or
- the first casing element is fixed to the flange section and the second casing element is fixed to the flange section and to the first casing element. In claim 4 or claim 5,
The energy distribution device wherein the first casing element and the flange section form a integral part. The method according to any one of claims 2 to 5,
wherein the casing is swivel-mounted to the flange section. In claim 7,
An energy distribution device, wherein a joint ball joint joins the flange section and the casing. The method according to any one of claims 2 to 5,
The energy distribution device further comprising an adapter element adapted to be mounted between the flange section and the casing. The method according to any one of claims 2 to 5,
The length of the casing is greater than the diameter or maximum width of the cross-section of the casing. The method according to any one of claims 2 to 5,
The cable inserted through the opening of the casing has a first minimum radius of curvature, and the wire of the cable has a second minimum radius of curvature,
the casing has a length along its longitudinal axis of 0.05 to 2 times the first minimum radius of curvature, and/or
wherein the casing has a length of 0.1 to 5 times the second minimum radius of curvature along its longitudinal axis. The method according to any one of claims 2 to 5,
An energy distribution device further comprising a valve unit configured to connect an internal space of the casing and an external space outside the casing and to compensate for an air pressure difference between the internal and external spaces of the casing. The method according to any one of claims 2 to 5,
wherein the casing includes a fixture that secures the cable to the casing to stabilize the first electrical connection means from mechanical pressure induced by a force applied to the cable. The method according to any one of claims 1 to 5,
The power socket has a length in the axial direction of the power socket, and the depth of the housing in the axial direction is less than 1.5 times the length of the power socket in the axial direction. The method according to any one of claims 1 to 5,
- the housing comprises a third opening,
- a second connecting device is mounted in the third opening, the second connecting device being configured according to the first connecting device, and
Energy distribution device, characterized in that the second electrical connection means of the second connection device is electrically connected to the second electrical connection means of the first connection device within the housing. The method according to any one of claims 1 to 5,
- the housing comprises a first housing and a second housing, the first housing having a first abutment opening in a side wall of the housing,
- the second housing is disposed adjacent to the side wall,
- the second housing has a second abutment opening adjacent to the first abutment opening of the first housing,
- an electrical conductor extends through the first and second connection openings to establish an electrical connection between a power socket mounted on the first housing and a power socket mounted on the second housing. Distribution device. In claim 16,
A third connection device is mounted in the first connection opening of the first housing or the second connection opening of the second housing instead of the power socket, the third connection device being configured according to the first connection device,
The energy distribution device, wherein the first electrical connection means of the third connection device is electrically connected to the first electrical connection means of the first or second connection device. An energy distribution device for electric refrigerated containers, adapted to distribute a load current of three-phase high voltage greater than 10 A, said load current of three-phase high voltage requiring a cable with a sufficient wire cross-section, comprising:
- a housing separating an interior space from the environment and comprising a first opening and a second opening,
- a power socket, understood as an electrical power point for a detachable electrical connection with a power plug, and
- a first connection device comprising a first section, a second section and a flange section between the first section and the second section,
- Comprising a valve unit that connects the internal space of the casing and the external space outside the casing and compensates for the air pressure difference between the internal and external space of the casing,
- the first section 140 has first electrical connection means 120 adapted to be electrically connected to a cable, and the second section has second electrical connection means, said first and second electrical connection means are electrically interconnected using conductive elements extending through the flange section,
The first connection device is mounted to the housing using the flange section, partially penetrating a first opening of the housing, such that the first section of the first connection device is located outside the housing, the second section of the first connection device is located inside the housing,
The power socket is mounted in the second opening of the housing, and
The second electrical connection means is electrically connected to the power socket through an electrical connection inside the housing,
The first section 140 comprises a casing, which provides protection against ingress of dust and water in accordance with the IEC 60529 standard and has a rating of at least IP66, thus being dust-tight and also resistant to ultra-high pressure water jets. protected against,
An energy distribution device that prevents flashover between two adjacent connection means by increasing the clearance distance and creepage distance and improving the insulation barrier. In claim 18,
The first section includes a casing, the casing comprising:
- is designed to be mounted on the flange section,
- surrounding said first electrical connection means, and also
- an opening opposite the flange section for inserting the cable into the casing, the flange section being adapted to receive the casing. In claim 19,
the casing extends along a longitudinal axis perpendicular to the plane of the first opening, the casing
- axial movement along the longitudinal axis of said first connecting device,
- radial or combined radial-axial movement about said longitudinal axis, or
- combined axial and rotational movement along the longitudinal axis of the first connecting device
An energy distribution device, which is mounted on the flange section by. In claim 19,
wherein the casing includes first and second casing elements, the first and second casing elements being sealingly coupled to each other and forming a sealing coupling to the flange section. In claim 21,
- the first casing element is fixed to the flange section and the second casing element is fixed to the first casing element, or
- the first casing element is fixed to the flange section and the second casing element is fixed to the flange section, or
- the first casing element is fixed to the flange section and the second casing element is fixed to the flange section and to the first casing element. In claim 21 or claim 22,
The energy distribution device wherein the first casing element and the flange section form a integral part. The method of any one of claims 19 to 22,
wherein the casing is swivel-mounted to the flange section. In claim 24,
An energy distribution device, wherein a joint ball joint joins the flange section and the casing. The method of any one of claims 19 to 22,
The energy distribution device further comprising an adapter element adapted to be mounted between the flange section and the casing. The method of any one of claims 19 to 22,
The length of the casing is greater than the diameter or maximum width of the cross-section of the casing. The method of any one of claims 19 to 22,
The cable inserted through the opening of the casing has a first minimum radius of curvature, and the wire of the cable has a second minimum radius of curvature,
the casing has a length along its longitudinal axis of 0.05 to 2 times the first minimum radius of curvature, and/or
wherein the casing has a length of 0.1 to 5 times the second minimum radius of curvature along its longitudinal axis. The method of any one of claims 19 to 22,
wherein the casing includes a fixture that secures the cable to the casing to stabilize the first electrical connection means from mechanical pressure induced by a force applied to the cable. The method of any one of claims 18 to 22,
The first electrical connection means comprises a plurality of connectors, wherein a separating element made of electrically insulating material is disposed between each two adjacent connectors, and/or
The energy distribution device of claim 1 , wherein the second electrical connection means comprises a plurality of connectors, wherein a separating element made of electrically insulating material is disposed between each two adjacent connectors. The method of any one of claims 18 to 22,
Energy distribution device, wherein the first and/or second electrical connection means comprise screw terminals, clamping terminals, solder cups or welding plates. The method of any one of claims 18 to 22,
The power socket has a length in the axial direction of the power socket, and the depth of the housing in the axial direction is less than 1.5 times the length of the power socket in the axial direction. The method of any one of claims 18 to 22,
- the housing comprises a third opening,
- a second connecting device is mounted in the third opening, the second connecting device being configured according to the first connecting device, and
Energy distribution device, characterized in that the second electrical connection means of the second connection device is electrically connected to the second electrical connection means of the first connection device within the housing. The method of any one of claims 18 to 22,
- the housing comprises a first housing and a second housing, the first housing having a first abutment opening in a side wall of the housing,
- the second housing is disposed adjacent to the side wall,
- the second housing has a second abutment opening adjacent to the first abutment opening of the first housing,
- an electrical conductor extends through the first and second connection openings to establish an electrical connection between a power socket mounted on the first housing and a power socket mounted on the second housing. Distribution device. In claim 34,
A third connection device is mounted in the first connection opening of the first housing or the second connection opening of the second housing instead of the power socket, the third connection device being configured according to the first connection device,
The energy distribution device, wherein the first electrical connection means of the third connection device is electrically connected to the first electrical connection means of the first or second connection device. A connecting device for the electrical supply of refrigerated containers adapted to distribute a load current of three-phase high voltage greater than 10 A, said load current of three-phase high voltage requiring a cable having a sufficient wire cross-section, comprising:
Section 1 and Section 2; and
a flange section between the first section and the second section, the flange section being adapted to be secured to the housing adjacent an opening in the housing,
The first section has first electrical connection means adapted to be electrically connected to a cable, and the second section has second electrical connection means, the first and second electrical connection means extending through the flange section. are electrically interconnected using conductive elements that
The first section 140 comprises a casing, which provides protection against ingress of dust and water in accordance with the IEC 60529 standard and has a rating of at least IP66, thus being dust-tight and also resistant to ultra-high pressure water jets. protected against,
The first electrical connection means comprises a plurality of connectors, wherein a separating element made of electrically insulating material is disposed between each two adjacent connectors, and/or
said second electrical connection means comprising a plurality of connectors, wherein a separating element made of electrically insulating material is disposed between each two adjacent connectors;
The first and/or second electrical connection means include screw terminals, clamping terminals, solder cups or welding plates,
Connecting device which prevents flashover between two adjacent connecting means by increasing the tolerance gap and creepage distance and improving the insulating barrier. The connecting device according to claim 36, wherein the connecting device is the first connecting device according to any one of claims 2 to 5.