DEVICE THAT HAS CONNECTIONS FOR CONNECTION WITH A NUMBER OF SENSORS FOR RETROFITTING MEASURING TECHNOLOGY IN A DEVICE FOR DISTRIBUTING ELECTRIC ENERGY

Abstract

Shown is a device that has connections for connecting a number of sensors for retrofitting measurement technology in an electrical power distribution system, comprising a housing which includes a mounting device for securing the housing in the system and a base plate slidably mounted in the housing on which electrical components are attached. Also shown is a device for mounting, in particular for retrofitting, measurement and communication technology in an electrical power distribution system, comprising a power supply unit configured to supply the measurement and / or communication technology with energy. The power supply unit has a primary side and a secondary side, the primary side comprising a rectifier device connected to a first phase, a second phase, a third phase, and a neutral conductor of the system.

Description

AREA

[0001] The present invention relates to a device having connections for connecting a number of sensors for retrofitting measurement technology in an electrical power distribution system, for example, in a distribution cabinet for a low-voltage level of a power grid or in a local substation. The present invention further relates to a device for mounting, in particular for retrofitting, measurement and communication technology in an electrical power distribution system, comprising a power supply unit configured to supply the measurement and / or communication technology with energy, in particular direct current, especially 24V direct current. BACKGROUND

[0002] From EP 3 965 239 A1, a busbar support is known with a base plate, at least three busbar terminals arranged on a rear side of the base plate and spaced apart from each other in a longitudinal direction of the base plate, and electrical connecting lines leading from each busbar to a front side of the base plate, each connected to a protective switch, in particular a load break switch, in which at least one measuring device mounted on the base plate for its own electrical supply and for recording at least one electrical quantity is connected to at least one of the busbar terminals via at least one output of one of the protective switches. PRESENTATION OF THE INVENTION

[0003] A first device according to the invention, which has connections for connecting to a number of sensors for retrofitting measurement technology in a device for distributing electrical energy, comprises a housing which has a mounting device for fastening the housing in the device, a number of electrical components, wherein the electrical components are arranged in the housing and comprise at least one controller for acquiring measured values ​​from the sensors and a power supply, and a base plate slidably mounted in the housing, on which the electrical components are attached, wherein the base plate slidably mounted in the housing is displaceable relative to the housing from a mounting position to an operating position, wherein in the mounting position the mounting device is laterally offset to the electrical components for fastening the housing.

[0004] The term "connection," as used in the description and claims, refers in particular to a clamping point through which an electrical connection can be established with an electrical conductor that is inserted into the clamping point. Furthermore, the term "measurement technology," as used in the description and claims, refers in particular to a controller configured to acquire sensor measurements, process them if necessary, and transmit them to a higher-level unit. Finally, the term "electrical energy distribution device," as used in the description and claims, refers in particular to a distribution cabinet for a low-voltage level of a power grid or a local distribution substation.

[0005] The device can have multiple (e.g., three) busbars. The busbars can extend horizontally through the distribution cabinet or local network substation. The device can have one input bay and one or more output bays. The bays can be rectangular with vertical longitudinal axes. The bays can have the same length and width. The bays can be arranged horizontally side by side. The input bay and one or more of the output bays can be equipped with fuses. At an input bay, the three phases of a higher-level network branch can be connected to the busbars via fuses. At one or more of the output bays, the busbars can be connected to outgoing branches of the distribution network via fuses.

[0006] The busbars can be flat metallic conductors. The length of the busbars can be dimensioned to extend from one side of the distribution cabinet or local network substation to the opposite side, essentially utilizing the entire width of the cabinet or substation. The busbars can have a constant (standardized) vertical spacing. Furthermore, the busbars can be equipped with (standardized) mounting points so that each bay can be fitted with standard components. The mounting points can be blind or through holes with internal threads.

[0007] Furthermore, the term "mounting device," as used in the description and claims, refers in particular to a component with a recess designed to fasten the housing to a mounting point by means of a screw connection. The component may, for example, be a sheet metal part with a (circular) opening large enough to allow the shank of a specific (standardized) screw to pass through, but not large enough to allow the screw head to pass through. The housing may also have two mounting devices for securing the housing in the device. In this case, each mounting device may have a component with a recess designed to fasten the housing to a mounting point by means of a screw connection.

[0008] Furthermore, the term "housing," as used in the description and claims, refers in particular to an arrangement of components surrounding the electrical components, serving to mount and / or (mechanically) protect the electrical components. For example, the housing may have a base plate (aligned parallel to the base plate) from which side elements extend, to which a cover may be attached. The components of the housing may be made of an insulating material. Furthermore, the term "controller," as used in the description and claims, refers in particular to a controlling unit (controller) in the form of a microcontroller. The controller may be powered by the power supply. In particular, the power supply may be configured to convert (400 volts) three-phase alternating current into 24 volts direct current.

[0009] Furthermore, the term "base plate," as used in the description and claims, refers in particular to a component of constant thickness made of an insulating material, which has a substantially rectangular contour. Furthermore, the term "slidably mounted," as used in the description and claims, refers in particular to a connection in the form of components guided through openings in the base plate and openings in the housing, wherein the openings in the base plate and / or the openings in the housing are dimensioned such that relative movement between the base plate and the housing (preferably in the longitudinal direction of the base plate) is possible. For example, the components can be screws, and the base plate and / or the housing can have elongated holes.

[0010] Furthermore, the term "mounting position," as used in the description and claims, refers in particular to the position of the base plate relative to the housing during the mounting of the housing in the device. Furthermore, the term "operating position," as used in the description and claims, refers in particular to the position of the base plate relative to the housing during the operation of the components. In the mounting position, the electrical components mounted on the base plate may be less obscured than in the operating position. Elements of the electrical components, especially the terminals of the electrical components, may be more easily accessible in the operating position than in the mounting position.

[0011] The mounting device can be configured to be connected to a busbar of the device, which has internal threads at standardized mounting points, by means of a screw connection. In the mounting position, the device can be accessible through an opening in the housing. In the operating position, one of the electrical components can at least partially obscure the opening in the housing (in a direction perpendicular to the base plate).

[0012] The base plate can have a mechanism for locking it in the mounting and operating positions. For example, the mechanism can include a component that, when locked, engages in a recess in the housing and can be pulled out of the recess against a restoring force to move the base plate.

[0013] The controller can be configured to detect a number of voltages and / or currents of a three-phase alternating current output by the electrical power distribution system. The controller can further be configured to transmit data regarding the detected voltages and / or currents wirelessly or via cable to a higher-level unit, in particular a control center. The power supply can include an energy storage device that allows the controller to continue operating in the event of a power supply failure until the controller sends a fault message to the higher-level unit.

[0014] A distribution cabinet according to the invention for a low-voltage level of a power network comprises one, two, or three busbars extending horizontally within the distribution cabinet and the device, wherein the housing of the device is attached to one of the busbars, preferably to two of the busbars. The distribution cabinet can be a local network substation. The distribution cabinet can have several installation spaces for output bays. The busbars can extend through the installation spaces. Each busbar can have mounting points for a busbar support with fuses. The mounting device can be configured for attachment to one of the mounting points. For example, the mounting device can be attached to one or two mounting points in a (previously) unused output bay.

[0015] A second device according to the invention for mounting, in particular for retrofitting, measuring and communication technology in a device for distributing electrical energy comprises a power supply unit configured to supply the measuring and / or communication technology with energy, in particular direct current, in particular 24V direct current, wherein the power supply unit has a primary side and a secondary side, wherein the primary side has a rectifier device and wherein the rectifier device is connected to a first phase L1, to a second phase L2, to a third phase L3 and to a neutral conductor N of the device. The rectifier device can have three independently operable rectifier circuits. The first rectifier circuit can be connected to the first phase L1 and the neutral conductor N. The second rectifier circuit can be connected to the second phase L2 and the neutral conductor N.The third rectifier circuit can be connected to the third phase L3 and the neutral conductor N.

[0016] The power supply can be configured to output a signal at its first output indicating whether one or more of the rectifier circuits are malfunctioning. The power supply can also be configured to output a control signal at its second output, which controls the operation of an uninterruptible power supply (UPS).

[0017] The device may further include communication technology, wherein the secondary side has an energy storage device that makes it possible to continue operating the communication technology in the event of a power supply failure of the power supply unit until a fault message has been sent to a higher-level unit, in particular a control center.

[0018] The device can further include measuring equipment, wherein the secondary side has a first DC output and a second DC output, and the second DC output is connected to the energy storage device. The measuring equipment can be connected to the first DC output, and the communication equipment can be connected to the second DC output.

[0019] Furthermore, it is understood that the features described in connection with the devices and the distribution cabinet can also be features of a process in which the devices are used or the distribution cabinet is equipped, and vice versa. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The invention is explained below in detail by means of exemplary embodiments, with reference to drawings in which: Fig. 1a a top view of the base plate of a device for mounting / retrofitting measuring and / or communication technology in a facility for the distribution of electrical energy, wherein the base plate is in the mounting position; Fig. 1b a cross-sectional view of the in Fig. 1a Device shown for mounting / retrofitting measuring and / or communication technology in a facility for the distribution of electrical energy; Fig. 2a a top view of the base plate of a device for mounting / retrofitting measuring and / or communication technology in a facility for the distribution of electrical energy, wherein the base plate is in the operating position; Fig. 2b a cross-sectional view of the in Fig. 2a Device shown for mounting / retrofitting measuring and / or communication technology in a facility for the distribution of electrical energy; Fig. 3a a top view of the base plate of a modified device for mounting / retrofitting measuring and / or communication technology in a facility for the distribution of electrical energy, wherein the base plate is in the mounting position; Fig. 3b a cross-sectional view of the in Fig. 3a device shown for mounting / retrofitting measuring and / or communication technology in a facility for the distribution of electrical energy; Fig. 4a a top view of the base plate of the modified device for mounting / retrofitting measuring and / or communication technology in a facility for the distribution of electrical energy, wherein the base plate is in the operating position; Fig. 4b a cross-sectional view of the in Fig. 4a Device shown for the installation / retrofitting of measurement and / or communication technology in a facility for the distribution of electrical energy; Fig. 5a a section of a front view of an opened distribution cabinet for a low-voltage level of a power network; Fig. 5b a cross-sectional view of the in Fig. 5a distribution cabinet shown; and Fig. Figure 6 shows a power supply unit that is set up to supply the measuring and / or communication equipment with 24V DC voltage.

[0021] In the drawings, identical or functionally similar elements are identified by the same reference symbols. WAYS TO IMPLEMENT THE INVENTION

[0022] Fig. Figure 1a shows a top view of the base plate 120 of a device 100 for mounting / retrofitting measuring and / or communication technology in a facility for the distribution of electrical energy, in which the base plate 120, which is slidably mounted in the housing 110, is in a mounting position. Fig. Figure 2a shows the base plate 120 in the operating position. As can be seen from a comparison of Fig. 1a and Fig. As can be seen in Figure 2a, the mounting points 116 of the base plate 120 are provided for mounting the electrical components such as the controller 130 and the power supply 140 on the base plate 120 (in Fig. 1a (indicated by dashed lines), in the mounting position, the openings 118 in the housing 110, through which the mounting devices are accessible, are located further away than in the operating position. This makes it easier to mount a device 100 that is already equipped with the electrical components and thus allows the device 100 to be equipped with the electrical components at the factory.

[0023] As a synthesis of Fig. 1a, Fig. 1b, Fig. 2a and Fig. As can be seen in Figure 2b, the base plate 120 is slidably mounted in the housing 110 by virtue of the base plate 120 being provided with a series of (longitudinally extending) elongated holes 126 into which components guided through openings in the housing 110 engage. Since the openings 118 in the housing 110 may be covered with a cover (not shown) which projects towards the base plate 120, the base plate 120 is provided with recesses 122 which are dimensioned such that the cover does not impede the movement of the base plate 120 relative to the housing 110. As can be seen from a summary of Fig. 3a, Fig. 3b, Fig. 4a and Fig. As shown in Figure 4b, the base plate 120 can further comprise a mechanism for locking the base plate 120 in the mounting position and the operating position. The mechanism includes a component 124 which, in the locked state, engages in a recess 114 in the housing 110 and can be pulled out of the recess 114 against a restoring force to move the base plate 120.

[0024] Fig. Figure 5a shows a section of a front view of an opened distribution cabinet 500 for a low voltage level of a power network. Fig. 5b shows the cross-sectional view of the in Fig. Distribution cabinet 500 shown in section 5a along the section plane EE. The distribution cabinet 500 comprises three busbars, of which in Fig. Figure 5a shows section two, i.e., busbars 510 and 520. An input bay 540 and two output bays 550 and 560 are arranged in the direction of extension of busbars 510 and 520. At output bay 550, busbars 510 and 520 are connected via fuses (not shown) to outgoing branches of a distribution network (not shown). Device 100 is arranged at output bay 560, being attached to mounting points 512 and 522 of busbars 510 and 520, respectively. Sensors 200 are connected to terminals of device 100, which detect the voltage and current of the three-phase alternating current output for the distribution of electrical energy through the distribution cabinet 500.

[0025] For example, the sensors 200 can be connected to terminals of the controller 130, which sends the measured values ​​to a higher-level unit via a router 160. The controller 130 can be powered by the power supply 140, and the power supply 140 can be supplied with the three-phase alternating current from the input field 540 via a circuit breaker 170. As in Fig.As shown in Figure 6, the power supply 140 has a primary side 142 and a secondary side 144, the primary side 142 comprising a rectifier device 146 which is connected to the first phase L1, the second phase L2, the third phase L3 and the neutral conductor N of the input field 540 of the device 500. The rectifier device 146 has three independently operable rectifier circuits 146a, 146b and 146c, which are designed as two-pulse bridge rectifiers. Each of the two-pulse bridge rectifiers is connected to one of the phases L1, L2 and L3 and the neutral conductor.

[0026] The secondary side 144 has two DC outputs 150 and 152: an unbuffered DC output 150 and a buffered DC output 152, which is connected to an energy storage device 148 on the secondary side 144. While the measuring equipment can be connected to the first DC output 150, the communication equipment can be connected to the second DC output 152, so that the controller 130 can continue operating in the event of a power supply failure to the power supply 140 until it has sent a fault message to a higher-level unit, in particular a control center. The power supply 140 has an output for this purpose, through which it sends a signal indicating whether the operation of one or more of the rectifier circuits 146a, 146b, and 146c is disrupted. An (external) uninterruptible power supply (UPS) can also be controlled via this output (or a separate output). REFERENCE MARK LIST 100 devices 110 cases 112 Mounting device 114 recess 116 attachment points 118 Opening 120 Base plate 122 recess 124 components 126 slotted hole 130 controllers 140 power supply 142 Primary page 144 Secondary page 146 Rectifier device 146a Rectifier circuit 146b Rectifier circuit 146c Rectifier circuit 148 energy storage devices 150 DC output 152 DC output 160 routers 170 circuit breakers 200 sensors 500 Electrical energy distribution equipment / distribution cabinet 510 busbar 512 Mounting point 520 busbar 522 Mounting point 540 Entrance area 550 starting field 560 starting field L1 Phase L2 Phase L3 Phase N Neutral conductor QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] EP 3 965 239 A1

[0002]

Claims

[1] Device (100) having connections for connecting to a number of sensors (200) for retrofitting measurement technology in a device (500) for the distribution of electrical energy, with a housing (110) which has a mounting device (112) for fastening the housing (110) in the device (500); with a number of electrical components (130, 140), wherein the electrical components (130, 140) are arranged in the housing and comprise at least one controller (130) for acquiring sensor readings and a power supply (140); and with a base plate (120) which is slidably mounted in the housing (110) and on which the electrical components (130, 140) are attached; wherein the base plate (120) which is slidably mounted in the housing (110) is displaceable relative to the housing (110) from a mounting position to an operating position, wherein in the mounting position the mounting device (112) is accessible laterally offset to the electrical components (130, 140) for fastening the housing (110). [2] Device (100) according to claim 1, wherein the mounting device (112) is less obscured in the mounting position by the electrical components (130, 140) attached to the base plate (120) than in the operating position. [3] Device (100) according to claim 1 or 2, wherein elements of the electrical components (130, 140), in particular connections of the electrical components (130, 140), are more accessible in the operating position than in the mounting position. [4] Device (100) according to one of claims 1 to 3, wherein the mounting device (112) is configured to be connected by means of a screw connection to a busbar (510, 520) of the device (500), which has internal threads at standardized mounting points (512, 522). [5] Device (100) according to any one of claims 1 to 4, wherein the mounting device (112) is accessible in the mounting position through an opening (118) in the housing (110). [6] Device (100) according to any one of claims 1 to 5, wherein the base plate (120) has a mechanism for locking the base plate (120) in the mounting position and the operating position. [7] Device (100) according to claim 6, wherein the mechanism comprises a component (124) which, in the locked state, engages in a recess (114) in the housing (110) and can be pulled out of the recess (114) to move the base plate (120) against a restoring force. [8] Device (100) according to any one of claims 1 to 7, wherein the controller (130) is configured to detect a number of voltages and / or a number of currents of a three-phase alternating current output by the device (500) for the distribution of electrical energy. [9] Device (100) according to claim 8, wherein the controller (130) is further configured to transmit data regarding the detected voltages and / or currents wirelessly or via cable to a higher-level unit, in particular a control center. [10] Device (100) according to claim 9, wherein the power supply (140) has an energy storage device (148) which makes it possible to continue operating the controller (130) in the event of a power supply failure of the power supply (140) until the controller (130) has sent a fault message to the higher-level unit. [11] Distribution cabinet (500) for a low-voltage level of a power network, comprising: Busbars (510, 520) extending horizontally in the distribution cabinet (500); and a device (100) according to one of claims 1 to 10, wherein the housing (110) of the device (100) is attached to one of the busbars (510, 520), preferably to two of the busbars (510, 520). [12] Distribution cabinet (500) for a low-voltage level of a power network according to claim 11, wherein the distribution cabinet (500) is a local network substation. [13] Distribution cabinet (500) for a low-voltage level of a power network according to claim 11 or 12, wherein the distribution cabinet (500) has several installation spaces for output fields (540, 550, 560); the busbars (510, 520) extend through the installation spaces; wherein each busbar (510, 520) has mounting points (512, 522) for a busbar support with fuses; and wherein the mounting device (112) is set up for attachment to one of the mounting points (512, 522). [14] Device (100) for mounting, in particular for retrofitting, measuring and communication technology in a facility (500) for distributing electrical energy with a power supply unit (140) which is designed to supply the measuring and / or communication technology with energy, in particular direct current, in particular 24V direct current; wherein the power supply (140) has a primary side (142) and a secondary side (144); wherein the primary side (142) comprises a rectifier device (146); and wherein the rectifier device (146) is connected to a first phase (L1), to a second phase (L2), to a third phase (L3) and to a neutral conductor (N) of the device (500). [15] Device (100) according to claim 14, wherein the rectifier device (146) has three independently operable rectifier circuits (146a, 146b, 146c); wherein the first rectifier circuit (146a) is connected to the first phase (L1) and the neutral conductor (N); wherein the second rectifier circuit (146b) is connected to the second phase (L2) and the neutral conductor (N); and the third rectifier circuit (146c) is connected to the third phase (L3) and the neutral conductor (N). [16] Device (100) according to claim 15, wherein the power supply (140) is configured to output a signal at a first output of the power supply (140) indicating whether the operation of one or more of the rectifier circuits (146a, 146b, 146c) is disrupted. [17] Device (100) according to claim 15 or 16, wherein the power supply (140) is further configured to output a control signal at a second output of the power supply (140) which controls the operation of an uninterruptible power supply. [18] Device (100) according to any one of claims 14 to 17, further comprising: communication technology; wherein the secondary side has an energy storage device (148) which makes it possible to continue operating the communication technology in the event of a power supply failure of the power supply unit (140) until a fault message has been sent to a higher-level unit, in particular a control center. [19] Device (100) according to claim 18, further comprising: the measurement technology; wherein the secondary side (144) has a first DC output (150) and a second DC output (152); the second DC output (152) is connected to the energy storage device (148). the measuring equipment is connected to the first DC output (150); the communication technology is connected to the second DC output (152).

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