Busbar adapter with automatic switch

Abstract

The invention relates to a device (100) comprising three single-pole modules and a chassis (102) connectable to a busbar distribution system (110), the chassis (102) comprising three input connections (102a, 102b, 102c) and three output connections (104a, 104b, 104c), wherein each single-pole module comprises a single-pole device (504) for protection against short circuits and overloads and a single-pole device (501a, 501b) for interrupting and establishing current, and wherein the input connections (102a, 102b, 102c) and the output connections (104a, 104b, 104c) and the single-pole modules form three independent single-phase circuits (505a, 505b, 505c).

Description

Technical Field

[0001] The invention belongs to the field of low voltage panels for distributing low voltage electric power. In particular, the invention relates to low voltage panels for distributing electric current through several busbars parallel to each other, arranged horizontally, one for each phase, and more particularly to a device for the output of these panels. Background Art

[0002] Vertical fuse boxes for busbar systems with 185 mm spacing (center-to-center spacing of rows measured vertically) are the most commonly used devices in the power industry for low voltage (LV) power distribution. This system allows for a very compact design of LV switchboards. A general description of this type of design considers an observer standing facing the LV switchboard. An x-axis is thereby defined extending parallel to the ground from left to right with reference to the observer, and a y-axis extending parallel to the ground and perpendicular to the x-axis and defining the depth of the system. Furthermore, the z-axis is defined as being perpendicular to the other two axes and defining the height of the assembly. The most common system is one in which the busbars extend parallel to the ground along the x-axis, with a center-to-center spacing of 185 mm between the busbars.

[0003] In these busbar systems today, the current is distributed by means of three-pole bases of "vertical" design. The design of these bases broadly consists of a parallelepiped in which four of its parallel sides are much longer than the other eight, thus having the appearance of an "elongated" parallelepiped in which its longest side is parallel to the z-axis.

[0004] The main purpose of these busbar systems is to distribute power. That is, the current enters a single circuit and is divided into several branches for distribution. This division into "branches" is accomplished by fuse boxes.

[0005] The input contacts in the rear of the fuse box are arranged in a vertical line with the same spacing as the busbar, so that they are aligned with the busbar and allow easy connection. The output contacts are located in the lower part of the base so that the output cables of the fuse box leave from below in an orderly manner. This design allows some fuse boxes to be placed in parallel with other fuse boxes (depending on the busbar) for orderly distribution of conductors and full use of space.

[0006] The fuse boxes are stacked parallel to each other along the busbars. These systems are called "distribution busbars".

[0007] Over time, the standardization of fuse box dimensions has allowed the development of several cable connectors, safety tools, and even operating procedures, which have been improved over the years. Today, fuse box output connections are optimal in terms of size and accessibility. In addition, with the emergence of the "smart grid" on the market, different monitoring devices installed at the fuse box outlets have been developed.

[0008] Conventional switch disconnectors and reclosers on the market are not suitable for installation in busbar systems, so their use is not standardized in the power industry. Both input and output connections are arranged horizontally, and a transition busbar is required to switch from a vertical phase arrangement to a horizontal phase arrangement.

[0009] This means that a distribution system with outputs protected by automatic switches has a much larger size than a distribution system made with fuse boxes. Transition busbars are required to go from the horizontal position of switch connection to the vertical position of busbar connection. These transition busbars make the solution more expensive and not as efficient as the solution using fuse boxes (which makes better use of the available space). In addition, the number of possible outputs in the same space increases using a fuse box system with a vertical design.

[0010] Furthermore, one of the biggest drawbacks of automatic switches is that their sizes are not regulated under any standard, so that each manufacturer has its own size. This makes them completely unsuitable for the power industry market, where the products of different manufacturers must be 100% compatible and interchangeable. This allows the power industry to purchase equipment through competitive bidding, so that the purchase is split between different manufacturers, and any device can be installed in any board. This increases their purchase flexibility and increases the purchase price.

[0011] Internationally, there are switchboard kits that are suitable for the dimensions considered in the fuse box standards. The most important dimensions (at which the busbar system is prepared) include a maximum width of 100 mm for the equipment and a spacing of 185 mm between the input connections.

[0012] In order to solve the problem of adjusting the horizontal position of the connections in order to convert them into vertically arranged connections (which fit into the distribution busbars of the automatic switches), adapters for installing automatic switches in horizontal busbars have recently been released on the market. These adapters convert the vertical connections into horizontal connections in which the automatic switches can be installed.

[0013] Using these adapters, a multiphase switch with a conventional design can be installed in a horizontal busbar. However, they still have the problem of requiring a large amount of space, and since there is no standard regulating their dimensions, each manufacturer has its own dimensions, and therefore, interchangeability is still impossible.

[0014] During manufacturing, the busbar distribution system and / or distribution board may or may not be accessible from the back of the busbar, depending on the design of the board. However, typically, when the distribution board is installed in a substation, it is only accessible from the front. This is why it is very important for the equipment to be able to be connected from the front.

[0015] In some busbar distribution system applications, the output cables do not exit from below, but come out (or exit) from above. This depends on whether the cables are conducted underground or in the roof with cable ducts installed. In these cases, in the reversible configuration, the output terminals must be located at the top instead of the bottom.

[0016] Conventional switch disconnectors and reclosers available on the market exhibit the following characteristics: the current is interrupted simultaneously in all their phases (current cutoff of all poles), ie they do not allow the current to be cutoff individually for each phase.

[0017] They therefore consist of a mechanism that operates all phases simultaneously. In the case of an automatic switch, this mechanism causes all phases to be disconnected if a short circuit or an overload is detected in one of them. One of the advantages of fuse boxes (or fuse switches) relative to switch disconnectors is that they allow single-pole disconnection, that is, they allow the current of each phase to be interrupted individually.

[0018] These switches are commonly used in industrial applications where the disconnection of all phases is accepted and there is no need to disconnect the phases individually. In the electric utility market, it is essential to maintain the power supply to consumers. Most consumers consume power from only one of the phases, i.e., if the utility needs to disconnect the power due to a fault or maintenance work, it will look for equipment that allows it to disconnect only the affected phase while leaving the other phases in service, and the consumers connected to these phases are not affected by the disconnection and their power supply can be maintained. For this reason, fuse blocks are the most used equipment in the electric utility because they allow the current of each phase to be interrupted individually.

[0019] Alternatively, and for specific applications, if one of the phases fails, it may be desirable for the device to disconnect not only the phase with the fault, but also the remaining phases. This may be the case where the device is to protect the engine or maintenance work is to be carried out on that line, and for increased personal safety, the power supply is removed in three phases.

[0020] In the field of automatic switching, it is known that even if the device is automatically disconnected, a manual switch is performed locally. The switch is equipped with a controller and a mechanism that can interrupt or establish the current based on the manual action of the user. In some cases, a remote switch is required to interrupt or establish the current.

[0021] The most common events in distribution networks are related to overloads and minor faults of little consequence. That is, the occurrence of short circuits is not very common, but due to the severity of their consequences, distribution systems need to be reliably protected against this phenomenon.

[0022] As is well known, fuses are components that offer many advantages in terms of protection against short circuits. The rapid response of fuses relative to reclosers is well documented in the prior art. The short circuit levels that would cause fuses to operate are much higher than the short circuit levels provided by reclosers. In order for the recloser to be able to operate against such high values ​​of short circuits (similar to fuses), the recloser must be large in size, making it unsuitable for use as an output device in a switchboard design. The fuse consists of a very simple mechanism, and it does so in a very small space compared to the complexity of the mechanism of the recloser. Therefore, reclosers with high disconnect capabilities against short circuits are not suitable for the compact designs required by the power industry.

[0023] As mentioned in the previous paragraph, the most common type of event is not a short circuit, but an insignificant fault, that is, the power returns to its natural state within a few seconds and resumes normal operation. That is, the current peak causes the fuse to work but is not a real reason for danger. In these cases, fuse protection has a weakness because in these cases, the fuse works. After the fuse works, someone must go to its location to replace it with a new fuse. This is expensive for the power industry. In some cases, for specific applications, this is difficult, especially when there is no legitimate reason to do so. In these cases, it is very advantageous to be able to restore the current remotely without physically getting there. The fuse box is a device that interrupts / establishes the current by manual operation of a movable contact. The movable contact is usually the fuse itself. This means that it is impossible to operate it automatically, let alone remotely.

[0024] In this sense, the advantage of switches is that they can be operated remotely if they have the actuating drive required for such switching action, and thus the current flow can be restored by a control center.

[0025] It has been shown that one of the advantages of switches is that the current can be restored remotely. That is, if the switch is switched off and the current is interrupted, it can be restored remotely. This is an advantage when the power is cut off due to an overload or a "no-brainer" fault (the most common case). It is also necessary to consider what would happen if the power was cut off because there was a short circuit or if the cause of the short circuit was a person who had suffered an accident. In these cases, if the power is restored without knowing the reason why the power was cut off, the problem may be made worse.

[0026] There is a limit to the number of times switches can be opened by a short circuit they can sustain, and they experience each short circuit, gradually wearing out and reducing the useful life of the product. Equipment with a long useful life (20 years or more) and minimal maintenance requirements is required in the power industry market, and this means that automatic switches are not accepted in this market.

[0027] Automatic switches are relatively expensive devices. Moreover, considering the basic principle of automatic switches, they may need to be replaced after a certain period of time, depending on the working conditions to which they are exposed during their life. In low voltage switchboards, the loads to which the phases are subjected are not always the same. That is, the working conditions of the phases can be different and in one device there may be damaged phases while other phases are good.

[0028] In recent years, the need to manage energy has been growing. The trend of including current sensors in power equipment in power distribution systems is in full swing. Moreover, the equipment may include voltage taps at different locations to obtain data about the voltage levels of different parts of the equipment. This data provided by the current and voltage sensors is used to monitor the operation of the equipment through additional electronics.

[0029] The common way to check whether a fuse is working is to check the voltage drop in its terminal. For this reason, a protection and switching device capable of being used as an output device of a low voltage board is needed in a single device to overcome the drawbacks of vertical fuse boxes and switches. That is: it can be installed in a distribution busbar, it prevents short circuits, it prevents overloads, it allows single-pole disconnection, interruption of current, protection against overloads, protection against short circuits, it can be operated locally and remotely, and it provides mechanical and structural improvements that facilitate its installation and allow space saving. Therefore, the present invention is particularly relevant to meeting these needs. Summary of the invention

[0030] The invention relates to an automatic device, which is a busbar adapter for protecting, controlling and interrupting and establishing current, comprising a single-pole device for protecting each phase of a three-pole system against overload and short circuit. In addition, the device may comprise a manual and / or remote start drive for interrupting and establishing current for each pole.

[0031] A device is provided which complies with the dimensions of the most common busbar system on the market (busbars with 185 mm pitch), making it compatible with most terminals, tools and equipment developed on the market for fuse boxes. The device according to the invention allows to comply with the dimensions of known busbars, making it fully compatible with existing switchboard kits, thus simplifying its integration on the market. The design of the device consists of a phase conductor that transfers the current from the line connection to the lower part of the device, such as Figure 1B As shown, preferably each conductor is isolated from the remaining conductors by mechanical means (such as walls and conduits, for example).

[0032] The device according to the invention comprises input connections adapted to be connected to a horizontal distribution busbar system of a three-phase system. These input connection points may be located at the rear of the device, such as Figure 1BAs shown, and can be arranged vertically. In other embodiments, the position of the connection point relative to other connection points can be slightly offset.

[0033] In a preferred embodiment, the device according to the invention allows installation in a busbar system which is accessible only from the front.In a first embodiment, the housing or casing of the device comprises an opening which allows access from the front with a wrench for tightening the input connection.

[0034] In a second embodiment, the device allows some of the front protection part, which is part of the housing, to be removed to give free access to the area with the input connection for tools. This embodiment allows the front protection part to be put back in place once the connection is made. The device thus comprises two separable parts, a front part and a rear part for connecting the device to the distribution busbar.

[0035] The device according to the invention can be rotated 180° so that once the device is rotated, the input connection is connected at the same location, while the output connection changes from being located at the bottom to being located at the top. In a preferred embodiment, the device can be rotated 180° so that its output connection is located at the top. In another preferred embodiment, to perform this rotation, the front part of the device can be removed, the rear part rotated, and then the front part is installed again in the same position. Maintaining the position of the front part allows maintaining the ergonomics of the controller.

[0036] Therefore, an automatic switch is provided, which can disconnect each phase independently, while other phases continue to work. That is, in the case of an overload or short circuit in one phase, only that phase is disconnected, while other phases continue to be powered normally.

[0037] The disconnection can be done automatically and without external actuation.In a preferred embodiment, the device comprises means which, optionally in the event of a failure in one of the phases, send a signal to the other phases so that they also interrupt the current.

[0038] In a preferred embodiment, the device comprises a phase controller or mechanism that can be operated manually and locally to interrupt or establish the current. The device comprises a digital signal input that allows remote activation and allows its operation. In another preferred embodiment, the device has a disconnect coil that, once activated by an external signal, disconnects the mechanism for interrupting / establishing the current. Thus, the device can be operated remotely for interrupting the current and for establishing the current.

[0039] In a preferred embodiment, the device contains a fuse in each phase of the device. Inserting the fuse in series with the single-pole device for protection in the circuit allows increasing the level of short circuits that the device will withstand and extending its service life. If protection against short circuits is primarily the job of the fuse, the operator can go to the site for a more in-depth analysis of the situation before restoring the current by replacing the fuse. This, which may be a shortcoming of the prior art, becomes a safety guarantee. The interruption of the current by a short circuit occurs in very unusual and extremely unlikely circumstances. That is, only in the most unusual circumstances does the user or technician have to go out, and the reason for going out is reasonable.

[0040] The device comprises the necessary means to be able to confirm, in the case of disconnection of said device, whether the disconnection was caused by a short circuit or by an overload. This allows to decide whether the current can be restored remotely or whether a more in-depth analysis of the situation is required. Therefore, the device has a current and / or voltage sensor which allows its value to be monitored. This information is very valuable for monitoring power and controlling power, and it also allows, in the case of a switch being disconnected, to analyze the current and / or voltage values ​​before said disconnection and to discern whether the disconnection was caused by a short circuit or by an overload.

[0041] When fuses are included to prevent short circuits, the task of the automatic switch to prevent overloads is limited. This task will not damage the installation during its lifetime, while the task of preventing short circuits can be performed by the fuses, and the original automatic switch is thus "freed" from this critical aspect. Therefore, since the switch does not have to open in the event of a short circuit, the service life of the automatic switch is extended, and the need for maintenance is reduced, as well as eliminating the need to replace the installation, making it more compatible with the basic principles of the installation of the power industry.

[0042] In a preferred embodiment, the device comprises a modular design formed by single-pole modules, as can be observed in Figure 4. Thus, if the switch has to be replaced because it is damaged, the assembly formed by single-pole elements allows replacing the damaged pole instead of the entire assembly.

[0043] The device is compatible with measurement modules designed for fuse boxes, which include current sensors and can be placed at the output terminals.

[0044] The device includes an opening through which the tip of a tester or multimeter can be introduced to check the voltage drop across the terminals of each fuse and to check whether the fuse is blown. This check is done on site by the user.

[0045] The device may include an indicator that lights up when the fuse is operational. The indicator is powered by the voltage in the terminals of the fuse so that there is no voltage drop when the fuse is intact, and there is a voltage drop that causes the indicator to activate when the fuse is blown.

[0046] To supplement the current and / or voltage sensors, the installation will be equipped with electronics that allow knowing the state of the fuse, the current value, the voltage value, the frequency, the active-reactive power, etc., based on the current and / or voltage data provided by the sensors.

[0047] Once the device is disconnected, the electronics analyze the data from the moment before the disconnection and can tell whether it was disconnected due to a short circuit or an overload. This information is crucial in deciding whether to perform a remote reconnection or whether another solution (such as going to its location) is necessary.

[0048] In another embodiment, through appropriate software, the electronics can determine whether the conditions necessary for automatic reconnection exist.

[0049] Device allowing replacement of a working fuse by removing the cover protecting it, so that once the cover is removed, the fuse is accessible so that it can be easily removed and a new fuse can be inserted to replace it. This replacement of the fuse in each phase can be done without regard to the other phases. As a safety measure, the fuse can be accessed only when there is no circulating current, for which purpose, in the case of the switch being closed, the front is blocked by a stopper, so that they cannot be removed to access the fuse until the switch is safely opened. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] To supplement the ongoing description and for the purpose of contributing to a better understanding of the characteristics of the invention according to a preferred embodiment thereof, a set of drawings is attached as an integral part of said description, in which schematic and non-limiting language are depicted as follows.

[0051] Figure 1A A front view of an automatic switch for controlling and interrupting an electric current according to the invention is shown, the automatic switch being connected to a busbar system.

[0052] Figure 1B A rear view of an automatic switch according to the present invention is shown.

[0053] Figure 1C The output connections of the automatic switch according to the present invention are shown.

[0054] Figure 2 The rear part of the recloser comprising the input connections for connection to the busbar and the front part of the recloser for the three phases is shown.

[0055] Figure 3A and Figure 3B A view of an automatic switch is shown comprising a front portion separated from a rear portion, the rear portion comprising a downward output connection and an upward output connection, respectively.

[0056] Figure 4 Figure 4B and Figure 4C A modular three-phase version of the device according to the invention is shown, which is formed from three independent single-pole modules.

[0057] Figure 5A , Figure 5B and Figure 5C A single-line diagram of a single-phase circuit showing an automatic switch. DETAILED DESCRIPTION

[0058] Figure 1A A front view of a busbar adapter 100 with automatic switch according to the present invention is shown, which is connected to a three-phase busbar system 110. The busbar adapter 100 comprises a rear part or chassis 102 and a front part or protective housing 101 that accommodates a single-pole module, which comprises an automatic interruption device 504 for protecting each phase against overload and short circuit. In addition, the module may comprise means 501a, 501b for manually and / or remotely interrupting and establishing current for the three independent phases of the three-phase system (e.g., in FIG. 1 ). Figure 5B Observable in), fuse 502 (as in Figure 5B and Figure 5C ) and current sensors 503a, 503b. The busbar adapter 100 comprises a modular design formed by single-pole modules. Thus, if a switch has to be replaced due to its damage, the assembly formed by the individual single-pole elements allows the damaged pole to be replaced instead of the entire assembly.

[0059] The busbar adapter 100 is designed to control each phase of a three-phase busbar 110. The chassis 102 includes three input connections 102a, 102b, 102c that can be connected to the busbar system 110 (e.g., Figure 1B ) and components of output connections 104a, 104b, 104c (as can be seen in Figure 1C The input connections 102a, 102b, 102c and the output connections 104a, 104b, 104c and the device 504 for protection against overload and short circuit together form three independent single-phase circuits 505a, 505b, 505c, which are FIG. 5A to FIG. 5C In other embodiments, the number of input connections and output connections may vary.

[0060] An x-axis is defined which is parallel to the ground from left to right with reference to the observer and a y-axis which is perpendicular to the x-axis and defines the depth of the system. In addition, a z-axis is defined which is perpendicular to the other two axes and defines the height of the assembly. The input connections 102a, 102b, 102c are distributed such that they form a line along the z-axis, as in Figure 1B Observable in.

[0061] Each of the independent single-phase circuits 505a, 505b, 505c includes a single-pole device 504 for protection against overload and short circuit, such as FIG. 5A to FIG. 5C In addition, the independent single-phase circuits 505a, 505b, 505c may include a fuse 502 (such as Figure 5B and Figure 5C ), means 501a, 501b for manually and remotely interrupting and establishing current (also shown in Figure 5B and Figure 5C ), and a current sensor (in Figure 5C ). The devices 501a, 501b for interrupting and establishing current can be operated alternately by manual operation or by remote operation due to a short circuit or an overload or due to an explicit wish of an operator and thus allow a single-pole disconnection of the current, i.e. they allow interruption of the current of each phase separately.

[0062] Figure 1B A rear view of a busbar adapter 100 according to the invention is shown. The chassis 102 can be seen as well as three input connections 102a, 102b, 102c and three output connections 104a, 104b, 104c. Figure 1C The output connections 104a, 104b, 104c of the busbar adapter 100 according to the present invention are shown. The output connections 104a, 104b, 104c include two output conductors 104a, 104b arranged in one plane and a third output conductor 104c arranged at a predetermined distance from the plane, such as in Figure 1C Visible in.

[0063] Figure 2 A chassis 102 for connecting a busbar to a busbar adapter 100 and for the three phases of a three-phase system is shown. Figure 5B and Figure 5C A manual actuation element of a manual switch 501a for interrupting and establishing current is shown in FIG.

[0064] Figure 3A and Figure 3B The reversibility function of the busbar adapter 100 according to the invention is shown by a swivel device which allows the output connections 104a, 104b, 104c to be moved by 180 degrees, as in Figure 3A and Figure 3B The chassis 102 includes a lower position relative to the bus bar 110 ( Figure 3A ) and output connections 104a, 104b, 104c ( Figure 3B ). Therefore, in Figure 3AThe output connections 104a, 104b, 104c are located at the lower portion of the chassis 102. Figure 3B , the output connections 104 a , 104 b , 104 c are located on the upper portion of the chassis 102 .

[0065] FIG. 4A to FIG. 4C 1 shows a modular version of a busbar adapter 100 formed by three single-pole modules contained in three housings or casings 101a, 101b, 101c and a chassis 102. Each single-pole module forms an independent single-phase circuit 505a, 505b, 505, such as FIG. 5A to FIG. 5C As shown. Therefore, each module corresponds to a phase of the three-phase system of the busbar system 110. The installation of the module on the chassis 102 of the busbar adapter 100 can be Figure 4B As can be seen in the figure, the complete single-phase circuit 505a, 505b, 505 includes three input connections 102a, 102b, 102c and output connections 104a, 104b, 104c, as well as components of the module, such as a single-pole device 504 for preventing overload and short circuit, and also includes switches 501a, 501b, a fuse 502 and current sensors 503a, 503b.

[0066] Figure 5A , Figure 5B and Figure 5C Three separate single-phase circuits 505a, 505b, 505 of the busbar adapter 100 are shown. Figure 5C Optional current sensors 503a and 503b for input connections 102a, 102b, 102c and current sensor 503b for output connections 104a, 104b, 104c are shown, which allow monitoring of the current values ​​in these connections. The current values ​​are important for monitoring and controlling power, and in the event of a disconnection of switches 501a, 501b, the current values ​​also allow analysis of the current values ​​before the disconnection and the ability to identify whether the disconnection was caused by a short circuit or by an overload.

[0067] exist Figure 5A In the embodiment, a first single-phase circuit 505a housed in a housing 101a is formed by an input connection 102a and an output connection 104a and a device 504 for protection against overloads and short circuits, which activates the busbar adapter 100 for a given phase, interrupting the current of said phase.

[0068] The second single-phase circuit 505b comprises an input connection 102b, an output connection 104b and a device 504 for preventing overload and short circuit, which activates the busbar adapter 100 for the second phase and interrupts the current of the second phase. The third single-phase circuit comprises similar features to the single-phase circuits 505a, 505b and allows interrupting the current of the third phase.

[0069] Figure 5B Another preferred embodiment of a single-line diagram of three independent single-phase circuits 505a, 505b, 505 is shown, which also includes a fuse 502 and switches 501a, 501b. Thus, the first single-phase circuit 505a associated with the first housing 101a of the busbar adapter 100 is formed by the input connection 102a, the output connection 104a, the device 504 for preventing overload and short circuit, the manual switch 501a and the fuse 502. The manual switch 501a is equipped with a controller, such as in Figure 1A The current can be interrupted or established by manual action of the user.

[0070] The second single-phase circuit 505b includes input connection 102b, output connection 104b, device 504 to prevent overload and short circuit, fuse 502 and remote start switch 501b. The remote start switch 501b of the busbar adapter 100 includes a digital signal input that allows remote start to control the current.

[0071] The third single-phase circuit 505c includes Figure 5B The single-phase single-circuit 505a and 505b have similar characteristics.

[0072] Figure 5C Another preferred embodiment of a single-line diagram of three independent single-phase circuits 505a, 505b, 505 is shown, and the single-phase circuits 505a, 505b, 505 also include fuses 502 and current sensors 503a for input connections 102a, 102b, 102c and / or current sensors 503b for output connections 104a, 104b, 104c, and the single-phase circuits 505a, 505b, 505 also allow monitoring the value of the current in the connections. The data provided by the current sensors 503a, 503b will be used to monitor the operation of the adapter 100.

Claims

1. A busbar adapter (100) comprising three single-pole modules and a chassis (102) connectable to a busbar power distribution system (110), the chassis (102) comprising three input connections (102a, 102b, 102c) and three output connections (104a, 104b, 104c), in, The three input connections (102a, 102b, 102c) are arranged to be connected to a three-phase busbar power distribution system, so that when the busbar adapter (100) is connected to the busbar power distribution system, the three input connections (102a, 102b, 102c) are located at the rear of the busbar adapter (100), and wherein the three input connections (102a, 102b, 102c) are distributed so that they form a line along a Z axis defining the height of the busbar adapter (100), Each single-pole module comprises a single-pole device (504) for preventing short circuit and overload and a single-pole device (501a) for manually interrupting and establishing current, and / or a single-pole device (501b) for remotely interrupting and establishing current, and each single-pole module comprises a fuse (502) connected in series with the single-pole device (504) for preventing short circuit and overload, wherein the three input connections (102a, 102b, 102c), the three output connections (104a, 104b, 104c), the single-pole device for interrupting and establishing current, the fuse (502) and the single-pole device (504) for preventing short circuits and overloads form three independent single-phase circuits (505a, 505b, 505c), respectively for each of the three phases in the three-phase busbar power distribution system (110), and wherein the three output connections (104a, 104b, 104c) are arranged at a lower part of the chassis (102) relative to the busbar power distribution system (110), or are arranged at an upper part of the chassis (102) relative to the busbar power distribution system (110), and The busbar adapter (100) further comprises a current sensor, which is arranged in the output connection (104a, 104b, 104c) and / or in the input connection (102a, 102b, 102c) and / or in the single-pole module. wherein the busbar adapter (100) is configured such that, in order to connect the three input connections (102a, 102b, 102c) to a bar of a busbar system, the three output connections (104a, 104b, 104c) can be rotated 180°, so that the busbar adapter (100) is mounted such that the three output connections (104a, 104b, 104c) are located at the top relative to the busbar distribution system (110), or at the bottom relative to the busbar distribution system (110), wherein the chassis (102) is a rear portion containing the three input connections (102a, 102b, 102c) and the three output connections (104a, 104b, 104c), and wherein the busbar adapter (100) further comprises a removable protective housing (101) housing the single-pole module, wherein the protective housing (101) is coupled to the chassis (102), and The busbar adapter (100) is suitable for installation in a busbar system with a row spacing of 185 mm.

2. The busbar adapter (100) according to claim 1, wherein the busbar adapter (100) is configured to enable the chassis (102) to be coupled to the protective housing (101) when the chassis (102) is rotated 180° relative to the protective housing (101).

3. The busbar adapter (100) according to claim 1, comprising mechanical means mechanically fixed to the single-pole devices (501a) for manually interrupting and establishing current, said mechanical means allowing simultaneous activation of said devices in said three single-pole modules.

4. The busbar adapter (100) according to claim 1, comprising: an indicator of the state of one or more of said fuses (502); and / or An opening for checking the voltage value in the terminal of the fuse (502).

5. The busbar adapter (100) according to claim 1, wherein: The three output connections (104a, 104b, 104c) include: two output conductors (104a, 104b) arranged in one plane, and a third output conductor (104c) arranged at a predetermined distance from the plane.

6. The busbar adapter (100) according to claim 1, wherein: The busbar adapter (100) includes openings that allow access for tightening the input connections (102a, 102b, 102c).

7. The busbar adapter (100) of claim 1, comprising mechanical means for isolating the output connections (104a, 104b, 104c).

8. The busbar adapter (100) according to claim 1, comprising a communication device between the three single-pole modules, the communication device allowing single-pole disconnection of the three modules in response to single-pole disconnection of at least one single-pole module.

9. The busbar adapter (100) according to claim 1, wherein: The protective housing (101) comprises one or more detachable parts (101a, 101b, 101c) for accommodating the monopole module.

10. The busbar adapter (100) according to any one of claims 1 to 9, comprising electronics and / or software for acquiring electrical measurements related to the adapter, for identifying short circuits or overloads and for activating the adapter remotely and locally and in an automatic and assisted manner.

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