MESSMODUL

Description

FIELD OF THE INVENTION

[0001] The invention relates to a measuring module for measuring at least one measured variable in a low-voltage network, wherein the measuring module comprises a module housing, at least one phase contact for connection to a respective outer conductor and at least one measuring sensor for detecting at least one measured variable attributable to the respective outer conductor, and wherein at least one function indicator is provided for each phase contact, wherein the respective at least one function indicator is arranged on the module housing, and wherein the measuring module is configured to control the respective at least one function indicator as a function of the at least one detected measured variable and to optionally indicate an exceeding or falling below of at least one limit value of the at least one measured variable to be detected as an error signal by means of the respective at least one function indicator.

[0002] Furthermore, within the scope of the invention, a measuring device with at least one measuring module and with a communication module, and furthermore a measuring system with at least one measuring module or with a measuring device and with a load-break switch are specified. STATE OF THE ART

[0003] A large number of embodiments of measuring modules have already become known from the prior art, which are intended for measuring the current flowing in a conductor of a low-voltage distributor.

[0004] However, a disadvantage of many measuring modules known to date is that a function indicator, which on a conventional measuring module can usually be provided in the form of an optical and / or acoustic signal, usually only indicates the status of the entire measuring module or a specific function with a fixed measured variable. For example, such a measuring module can be provided with a function indicator for phase monitoring. In the event of a phase failure or voltage asymmetry in the low-voltage network, the function indicator is activated, and the measuring module then initiates, for example, the shutdown of the power supply to a device or a low-voltage distributor.

[0005] Furthermore, measuring modules are known from the prior art that are designed to measure only one measured value, such as voltage, while checking whether voltage is present on all outer conductors. For this purpose, an indicator can be provided for each outer conductor.

[0006] Furthermore, there are already measuring devices that can determine and display various measured variables. However, this is laborious and error-prone because it typically requires a user to read the display precisely. In particular, when using such measuring devices, a user cannot determine at a glance whether a currently displayed measured value of a recorded variable is within certain limits or thresholds of the recorded variable. These limits or thresholds are supposed to be adjustable according to the respective measurement task.

[0007] By definition, the colloquially used term "phase" refers to an outer conductor. A line conductor is a conductor that is energized during normal electrical operation and can contribute to the transmission or distribution of electrical energy, but is not a neutral conductor or center conductor. In single-phase connections with a nominal voltage of 230 V, for example, only one line conductor occurs and is usually designated by the letter L (from the English term: line conductor). In three-phase connections, there are therefore three outer conductors, usually designated L1, L2, and L3. These are three conductors, each with an alternating voltage 120° out of phase in a three-phase system. As a rule, both the line conductors and the neutral conductor are live, with an effective voltage of typically 400 V between the line conductors.In the following, the two terms "outer conductor" and "phase" are used interchangeably.

[0008] EP 3637355A1 discloses a display-free module for monitoring electrical parameters, preferably currents, in a control cabinet. Furthermore, instead of a display, the module comprises a communication terminal and an internal memory for measured data. All functional parts of the module are implemented on a printed circuit board (PCB).

[0009] EP 2282321A1 discloses a module for measuring the current flowing in a conductor of a low-voltage distribution board. It comprises a current sensor and a microprocessor circuit, and its external shape is designed to be installed in a low-voltage distribution board. The measured current is displayed in coded form by a plurality of LEDs, each LED corresponding to a fixed, non-adjustable percentage of a maximum current.

[0010] US 2015 / 070026A1 discloses a method for monitoring currents, voltages, power, and temperature in an electrical circuit and for shutting down the monitored circuit if necessary. The acquired data is sent to a data processing unit via a wireless data connection. If limit parameters are exceeded, this is not indicated directly, but rather the monitored circuit is shut down.

[0011] DE 102005025541A1 discloses a socket which comprises a current sensor which exclusively monitors the current flow in the circuit supplied by the socket. OBJECT OF THE INVENTION

[0012] It is therefore an object of the invention to overcome the disadvantages of the prior art and to propose a measuring module in which different measured variables can be displayed, in particular in phases, according to their respective current measured values, in such a way that a user can quickly and accurately recognize whether a currently displayed measured value of a detected measured variable lies within certain limit values ​​or threshold values ​​of the detected measured variable.

[0013] A further object of the invention is to provide a user-friendly measuring module, allowing a user to quickly, preferably at a glance, check and / or change the settings of the measuring module, in particular settings relating to individual limit values ​​or threshold values ​​of measured variables to be recorded. Furthermore, the measurement data recorded by the measuring module should be quickly readable. DESCRIPTION OF THE INVENTION

[0014] This object is achieved according to the invention with a measuring module according to claim 1.

[0015] A single outer conductor, which is assigned to at least one phase contact or which is connected to a specific phase contact, serves in particular, at least in part, as a "measurement object," i.e., as a carrier of a measured variable to be recorded. By definition, measured objects can be bodies, processes, or states. In combination with at least one measuring sensor suitable for recording at least one measured variable attributable to the outer conductor, the measuring module can record the respective measured variable. The respective measurement can, if necessary, be performed via the respective phase contact. Depending on the measured variable of interest, it may be necessary for several measuring sensors per outer conductor or per phase contact to interact through appropriate interconnection in order to record one or more measured variables of the respective measurement object in the form of an outer conductor.

[0016] Strictly speaking, for example, when a measured current is used as the measured quantity, it is not the measured current per phase contact, but rather the measured current per phase or the current detected by a corresponding measuring sensor. The corresponding phase contact can form the respective contact piece for each phase with the required electrical connection or supply to the corresponding measuring sensor, whereby the respective measuring sensor does not necessarily have to be in direct electrical contact with the corresponding phase. For example, the current can also be measured contactlessly or without contact using the generated magnetic field.

[0017] Within the scope of the invention, the at least one phase contact can also be designed as a contact terminal.

[0018] In a measuring module according to the invention, each phase contact and thus each individual outer conductor is assigned at least one dedicated function indicator, with the at least one function indicator being arranged on the module housing. This has the advantage that at least one individual function indicator is available on the device housing of the measuring module for each outer conductor or for each individual phase contact for connection to a respective outer conductor, with the measuring module being configured to control the respective function indicator depending on the at least one detected measured variable. Thus, the at least one detected measured variable attributable to a specific outer conductor can be displayed by the at least one function indicator assigned to the respective phase contact. Within the scope of the present invention, "connection" is to be understood in particular as establishing an electrical connection or contact.

[0019] In the measuring module according to the invention, the control of the respective at least one function indicator can be parameterized such that at least one limit value of the at least one measured variable to be recorded is predefined, preferably adjustable, and optionally an exceedance or undershoot of the limit value is indicated as an error signal by means of the respective at least one function indicator. The measuring module according to the invention therefore combines for the user both the advantages of rapid, unambiguous, and thus error-free determination of whether a currently displayed measured value of a recorded variable lies within certain limit values ​​or threshold values ​​of the recorded variable, as well as the advantages of flexible parameterization of the measured variables to be recorded, since the limit values ​​or threshold values ​​of the measured variables to be recorded can be parameterized in the measuring module according to the respective measuring task.

[0020] There are generally no limits to the selection and design of the at least one function indicator. For example, within the scope of the invention, it is possible to implement one or more function indicators for each phase contact for the phase-by-phase display of measured variables as optical and / or acoustic function indicators.

[0021] It may be particularly expedient to implement the at least one function indicator per phase contact as an optical function indicator. In a particularly robust and cost-effective embodiment of the invention, such an optical function indicator can be implemented, for example, in the form of one or more LED signal lights.

[0022] In addition to the respective function indicator, at least one display can also be provided on which, for example, current measured values ​​of one or more measured variables are displayed during operation of the measuring module.

[0023] In a further advantageous embodiment of the invention, at least two phase contacts can be provided in a measuring module, wherein the at least two phase contacts comprise a first phase contact for connecting a first outer conductor and a second phase contact for connecting a second outer conductor, and wherein at least one first function indicator arranged on the module housing is assigned to the first phase contact and at least one second function indicator arranged on the module housing is assigned to the second phase contact.

[0024] This design offers the advantage that two or more separate phase contacts are provided in one and the same measuring module, each for connection to a separate outer conductor, with at least one separate measuring sensor being provided for each phase contact for detecting a measured variable.

[0025] In particular for recording measured variables of a three-phase system with three conductors, the use of a measuring module according to the invention can be particularly advantageous, in which three phase contacts, consisting of a first phase contact, a second phase contact and a third phase contact, are provided, wherein the first phase contact is used to connect a first outer conductor, the second phase contact is used to connect a second outer conductor and the third phase contact is used to connect a third outer conductor, and wherein at least one first function indicator arranged on the module housing is assigned to the first phase contact, at least one second function indicator arranged on the module housing is assigned to the second phase contact and at least one third function indicator arranged on the module housing is assigned to the third phase contact.

[0026] It may be expedient if, in a measuring module according to the invention, the at least one function indicator per phase contact comprises an LED signal light, preferably a two-color or multi-color switchable LED signal light.

[0027] The use of LED signal lights offers the advantage that LED lights are generally robust, do not require cooling in the selected version and are therefore practically maintenance-free with a long service life. Furthermore, their compact design requires little space. Bi-color or multi-color switchable LED signal lights are preferably used, with a color change of the LED signal lights clearly attracting attention. Colored light thus offers an additional signaling function, as it quickly and clearly indicates to the user as soon as a predefined limit value for a specific measured variable is exceeded or undershot. This allows the user, for example, to draw conclusions about the status of a machine or system at a glance.In a further advantageous embodiment of the invention, at least two function indicators per phase contact can be provided in a measuring module, wherein the at least two function indicators are preferably each designed as LED signal lights, particularly preferably as two-color or multi-color switchable LED signal lights.

[0028] In this embodiment, for example, a first function indicator for each phase contact can indicate an active operating state, while a second and / or a further function indicator for each phase contact is or are parameterized in such a way that this second or further function indicator optionally indicates an exceeding or falling below of a set limit value of the measured variable to be recorded as an error signal.

[0029] Advantageously, with a measuring module according to the invention, depending on the respective equipment of the measuring module, at least one measured variable is recorded with the respectively required measuring sensors, which measured variable is selected from the group comprising: electrical current, electrical voltage, electrical power, ohmic resistance, energy consumption, power factor, efficiency factor, temperature of an electrical contact.

[0030] Such a measuring module can be used in a particularly versatile manner, with the measuring module according to the invention being equipped to record two or more measured variables, which can preferably be recorded simultaneously. For example, it may be expedient if, in one embodiment, a measuring module according to the invention can simultaneously record the respective applied electrical current and the current temperature prevailing at a contact terminal of the respective phase contact for each phase contact.

[0031] In AC electrical engineering, the power factor λ (lambda), also known as the active power factor, is the ratio of the amount of active power P to the apparent power S. The power factor λ can be between 0 and 1.

[0032] Only for sinusoidal alternating quantities can the efficiency factor be defined as the ratio of active power to apparent power. The efficiency factor is equal to the cosine of the phase shift angle φ (Phi).

[0033] It may be expedient if, in a measuring module according to the invention, the module housing has at least one fastening element. In a preferred embodiment, the at least one fastening element can be a fastening eyelet or comprise such a fastening eyelet that is suitable for fastening the measuring module to a holder in the broadest sense. For example, the fastening eyelet can be used for fastening to one or more outer conductors, which in this case function as a holder. Alternatively or additionally, in a further preferred embodiment, the at least one fastening element can be a housing recess or comprise such a recess that is suitable for fastening to a mounting rail, for example a top-hat rail.

[0034] This design variant of a measuring module offers the advantage of being particularly easy and flexible to attach to the respective location. This can be, for example, a low-voltage distributor with prepared mounting rails, such as top-hat rails, to which the measuring module can be attached using a corresponding housing recess. In the case where the at least one fastening element is a fastening eyelet or includes such a fastening eyelet, the measuring module can be attached particularly flexibly to the cables and / or outer conductors of the circuit to be measured or to any existing brackets, cable trays, and the like. Suitable additional mounting aids such as cable ties may be required for attachment.

[0035] The objects mentioned at the outset are also achieved with a measuring device having at least one measuring module, preferably having a plurality of measuring modules, according to the invention and with a communication module, wherein the communication module has a housing and is coupled to the at least one measuring module in terms of signal technology by means of a communication channel, in particular a wireless one, wherein the at least one measuring module has an interface for transferring digital measurement data acquired by the at least one measuring sensor to the communication module, and wherein the communication module has a data memory for storing the digital measurement data.

[0036] In addition to transmitting the acquired measurement data from the at least one measuring module to the communication module, the interface of the at least one measuring module can also serve as a data interface for an external mobile device. If the measuring module is equipped with a radio interface, for example, a Bluetooth- or ZigBee-compatible radio interface, communication or data transmission between the measuring module and an external mobile device can take place using radio signals, for example, via Bluetooth, provided the device used is equipped with suitable software.

[0037] For the implementation where communication or data transmission between the measuring module and an external mobile device is to be web- and / or internet-based, the communication module is expediently equipped as a gateway. In this case, a web server is also implemented. A user can then, for example, read out details of the recorded digital measurement data from a mobile device via a web browser and check the device parameters of the measuring module, and modify or configure them if necessary.

[0038] Likewise, the communication module can have one or more data interfaces, for example for an external mobile terminal and / or for stationary terminals, desktop computers, network computers and the like, with which a user can read out the digital measurement data stored in the data memory of the communication module, for example via an internet-based web browser access from a mobile terminal or a network computer and / or can read out details of the recorded digital measurement data via the communication channel and can check device parameters of the measuring module and, if necessary, change or parameterize them.

[0039] In a further development of the invention, the communication module can, for example, also have a display for visualizing the measurement data.

[0040] It may be particularly expedient if, in a measuring device according to the invention, the communication module comprises a mobile terminal, preferably a smartphone and / or a notebook computer, or is a mobile terminal.

[0041] Depending on the application, it may be advantageous if, in a measuring device according to the invention, either the at least one measuring module is integrated in the housing of the communication module, or the at least one measuring module and the communication module are designed to be able to detachably couple at least one module housing to the housing of the communication module.

[0042] The aforementioned embodiment, according to which at least one measuring module is integrated into the housing of the communication module, offers the advantage of a particularly compact arrangement of the individual measuring modules in a common housing of the communication module. In the embodiment in which at least one module housing of a measuring module can be detachably coupled to the housing of the communication module in a measuring system, measuring modules can be exchanged particularly easily and flexibly if necessary.

[0043] The measuring modules and the communication module typically communicate with each other in close proximity via signaling, as the individual modules are mounted, for example, in the same control cabinet of a low-voltage distribution board. If at least one measuring module is integrated into the housing of the communication module and / or if the housings of the individual modules are detachably coupled or pluggable together, a wired communication channel for data transfer can be implemented instead of a wireless communication channel for data transfer between the individual modules. For example, corresponding complementary or corresponding plug / socket connections in the connectable or pluggable housings can be used to create a wired communication channel.

[0044] In a further development of the invention, a measuring system with at least one measuring module, preferably with several measuring modules, or with a measuring device can also be specified, wherein the measuring system further comprises a load-break switch, wherein the load-break switch has a switch housing, at least one phase terminal for connection to a respective outer conductor and at least one switch terminal for connection to a respective continuing line and is designed to selectively switch on or off an electrical connection between the at least one phase terminal and the at least one switch terminal, and wherein the at least one phase contact of the at least one measuring module is shaped complementarily to the at least one phase terminal and / or to the at least one switch terminal of the load-break switch in order to be able to be clamped in the at least one phase terminal or switch terminal.

[0045] The use of such a measuring system according to the invention offers the advantage that one or more measuring modules can be clamped with their phase contacts to the phase terminals or switch terminals of the load-break switch, thereby achieving a particularly compact arrangement of the load-break switch with the one or more measuring modules clamped to it. Furthermore, possible contact errors between the load-break switch and the at least one clamped measuring module are avoided.

[0046] Depending on the application, it may be advantageous if, in a measuring system according to the invention, either the at least one measuring module is integrated in the switch housing of the load-break switch, or at least one measuring module and the load-break switch are designed to be able to detachably couple at least one module housing to the switch housing of the load-break switch.

[0047] Reference is made to the aforementioned advantages of modules that are integrated into a housing or that are arranged in housings that can be detachably coupled to one another. The aforementioned advantages apply equally to the design variants mentioned here, according to which at least one measuring module is integrated into the switch housing of the load-break switch or can be detachably coupled to the switch housing of the load-break switch.

[0048] In a further development of the invention, a low-voltage distributor with at least one measuring module, preferably with several measuring modules, or with a measuring device, or with a measuring system can also be specified. SHORT DESCRIPTION OF THE CHARACTERS

[0049] The invention will now be explained in more detail using exemplary embodiments. The schematic drawings are exemplary and are intended to illustrate the inventive concept, but in no way restrict it or represent it exhaustively.

[0050] Showing: Fig. 1 a first embodiment of a measuring module according to the invention in an isometric side view obliquely from above in front; Fig. 2 that in Fig. 1 illustrated measuring module in a frontal view of the top; Fig. 3 that in Fig. 1 illustrated measuring module in a front view of the front side surface; Fig. 4 a measuring system according to the invention comprising a measuring module and a load-break switch before coupling the two components; Fig. 5 a second embodiment of a measuring module according to the invention in an open arrangement without a cover lid in an isometric view obliquely from below; Fig. 6 that in Fig. 5 illustrated measuring module in a frontal view from below; Fig. 7 in a schematic representation of an arrangement of a measuring device according to the invention with a measuring module and with a communication module, both of which are fastened to a mounting rail, for example in a switch cabinet of a low-voltage distributor; Fig. 8 an arrangement comparable to that in Fig. 7 arrangement shown, wherein a mobile terminal serves as a communication module; Fig. 9 in a schematic representation an arrangement of a measuring system according to the invention with a measuring module, a communication module, and with a load-break switch; Fig. 10 an arrangement comparable to that in Fig. 9 shown arrangement, wherein a mobile terminal serves as a communication module. WAYS OF IMPLEMENTING THE INVENTION

[0051] The Figuren 1 bis 3 show in different views a first embodiment of a measuring module 1 according to the invention. Starting with Fig. 1 The measuring module 1 shown comprises a module housing 10, with a separate function indicator 11, 12, 13 provided for each phase contact. The function indicators 11, 12, 13 are each arranged on the module housing 10. Several measuring sensors 20 are provided in the module housing 10, with a first measuring sensor 21, a second measuring sensor 22, and a third measuring sensor 23 each being designed, for example, as current measuring sensors. Current measuring sensors or current transformers are electrical components with which the current intensity in cables and busbars can be measured galvanically isolated—and thus contactlessly—based on the magnetic flux density triggered by electrical currents.

[0052] In Fig. 2 , which shows the top side of the measuring module 1, it can be seen through cable glands for current measurement that at the Fig. 2 Three phase contacts 31, 32, 33 are arranged on the underside of the measuring module 1, located in the background of the image. The corresponding current measuring sensors are arranged invisibly inside the measuring module 1. The phase contacts 31, 32, 33 are each used in phases to connect or electrically contact a first outer conductor L1 or a first phase L1, a second outer conductor L2 or a second phase L2, and a third outer conductor L3 or a third phase L3.

[0053] Fig. 3 shows the three separate phase contacts 31,32,33 in the front view of the measuring module 1.

[0054] The measuring module 1 according to the invention shown here serves to measure at least one measured variable in a low-voltage network. The measuring module 1 comprises three separate phase contacts 31, 32, 33 for connection to a respective outer conductor L1, L2, L3, as well as at least three measuring sensors 20, 21, 22, 23 for detecting at least one measured variable attributable to the respective outer conductor L1, L2, L3. The measuring sensors 21, 22, 23 visible here are each designed as current measuring sensors. Additional measuring sensors 20 (indicated by dotted rectangles) can be arranged inside the housing of the measuring module 1, invisible from the outside.In detail, three phase contacts 31, 32, 33 are provided here, consisting of a first phase contact 31, a second phase contact 32 and a third phase contact 33, wherein the first phase contact 31 serves to connect a first outer conductor L1, the second phase contact 32 serves to connect a second outer conductor L2 and the third phase contact 33 serves to connect a third outer conductor L3.

[0055] At least one function indicator 11, 12, 13 is provided for each phase contact 31, 32, 33, wherein the respective at least one function indicator 11, 12, 13 is arranged on the module housing 10, and wherein the measuring module 1 is configured to control the respective at least one function indicator 11, 12, 13 as a function of the at least one detected measured variable. The measuring module 1 shown here is configured such that the control of the respective at least one function indicator 11, 12, 13 can be parameterized such that at least one limit value of the at least one measured variable to be detected is predefined in an adjustable manner, and optionally an exceedance or undershoot of the limit value is indicated as an error signal 14 by means of the respective at least one function indicator 11, 12, 13.

[0056] The function indicators 11, 12, 13 are each designed as multi-color switchable LED signal lights, whereby the exceeding and / or falling below of a predefined or set limit value is displayed as an error signal 14, whereby the color of the function indicators 11, 12, 13 when an error signal 14 is displayed differs from the color of the function indicators 11, 12, 13 in normal operation.

[0057] For example, it may be expedient if, in the case of a measurement of the electrical current strength per phase or measuring sensor, where the corresponding phase contact 31, 32, 33 represents the respective contact piece per phase with the electrical connection or supply, the measuring module 1 controls the respective function indicator 11, 12, 13 or the respective LED signal light 11, 12, 13 in such a way that in normal operation, for example if a predefined or preset limit value of a maximum current strength is undershot, the respective LED signal light 11, 12, 13 lights up green. If the preset maximum current strength is exceeded, for example, the respective LED signal light 11, 12, 13 is controlled in such a way that a color change occurs and the respective LED signal light 11, 12, 13 then displays a red illuminated or red flashing error signal 14.

[0058] Alternatively to Fig. 3 In the embodiment shown, the phase contacts 31, 32, 33 can also be designed as contact terminals within the scope of the invention, for example.

[0059] Fig. 4 shows a measuring system 110 according to the invention comprising a measuring module 1 according to the Figuren 1 bis 3 shown version with three phase contacts 31,32,33, as well as a load-break switch 5 before coupling K of the two components.

[0060] The load break switch 5 shown here has a switch housing 50, three phase terminals 51, 52, 53 for connecting to a respective outer conductor L1, L2, L3 as well as three switch terminals 51.1, 52.1, 53.1 for connecting to a respective outgoing line and is designed to selectively switch on or off an electrical connection between a phase terminal 51, 52, 53 and a respective switch terminal 51.1, 52.1, 53.1, which corresponds to the respective phase terminal 51, 52, 53, wherein the three phase contacts 31, 32, 33 of the measuring module 1 are each shaped complementarily to the phase terminals 51, 52, 53 of the load break switch 5 in order to be able to be clamped in the phase terminals 51, 52, 53.

[0061] Such an arrangement, which Fig. 4 is shown and in which the measuring module 1 with its phase contacts 31, 32, 33 is clamped on the input side to the phase terminals 51, 52, 53 of the load-break switch 5, offers the advantage that the measuring module 1 is connected to the outer conductors L1, L2, L3 and is supplied with current by them even when the load-break switch 5 is switched off.

[0062] However, the invention also includes a method related to Fig. 4 A reverse arrangement is conceivable, in which the phase contacts 31, 32, 33 of the measuring module 1 are shaped so that they can be clamped on the side of the switch terminals 51.1, 52.1, 53.1 of the load-break switch 5. This in relation to Fig. 4 The reversed arrangement of measuring module 1 and load break switch 5 is not explicitly shown in the figures.

[0063] With a dashed arrow K is in Fig. 4 a coupling direction K is indicated, in which the two components, namely the measuring module 1 and the load-break switch 5, can be coupled to one another, wherein the phase contacts 31, 32, 33 of the measuring module 1 are connected to the phase terminals 51, 52, 53 of the load-break switch 5 or are inserted into them.

[0064] The two images Fig. 5 und Fig. 6 relate to a second embodiment of a measuring module 1 according to the invention, in which a temperature sensor 36 is provided for each of the identically constructed phase contacts 31, 32, 33 to detect the temperature of an electrical contact, namely the respective phase contact 31, 32, 33. An electrical connection between a printed circuit board (not further designated) and the phase contacts 31, 32, 33 is made here, for example, by means of SMD spring contacts 34 (surface-mounted device). The phase contacts 31, 32, 33 are each attached to heat-conducting connection plates 35, into which the temperature sensors 36 are at least partially cast. For ease of illustration, Fig. 5 and in Fig. 6 In each case, the measuring module 1 is shown in an open configuration without a cover lid, and the middle phase contact 32 is shown removed in order to recognize the underlying components 34, 35, and 36. In the operating state of the measuring module 1, the module housing 10 is closed with a cover lid, and the middle phase contact 32 is attached in a similar way to the two outer phase contacts 31, 33.

[0065] Fig. 7 shows a schematic arrangement of a measuring device 100 according to the invention with a measuring module 1 and with a communication module 6, both of which are fastened, for example, to a top-hat or mounting rail T, for example in a switch cabinet of a low-voltage distributor. The position of the mounting rail T is indicated by two-dotted lines. The measuring module 1 comprises three phase contacts 31, 32, 33, consisting of a first phase contact 31, a second phase contact 32 and a third phase contact 33, wherein the first phase contact 31 serves to connect a first outer conductor L1, the second phase contact 32 serves to connect a second outer conductor L2 and the third phase contact 33 serves to connect a third outer conductor L3. The outer conductors L1, L2, L3 are each indicated by dashed lines.A first function indicator 11 is assigned to the first phase contact 31, a second function indicator 12 is assigned to the second phase contact 32, and a third function indicator 13 is assigned to the third phase contact 33. The function indicators 11, 12, and 13 are each arranged on the module housing 10.

[0066] The measuring module 1 includes several measuring sensors 20 for detecting at least one measured variable attributable to the respective outer conductor L1, L2, L3. For example, corresponding measuring sensors 20 are provided here that can measure the electrical current, the electrical voltage, the electrical power, the temperature of the electrical contact, and the ohmic resistance for each outer conductor L1, L2, L3. The measuring module 1 is configured to control the respective function indicator 11, 12, 13 depending on the measured variable detected.

[0067] The measuring module 1 is configured so that the control of the respective function indicators 11, 12, 13 can be parameterized such that at least one limit value of the at least one measured variable to be recorded can be predefined by a user, and either exceeding or falling below the limit value is indicated as an error signal 14 by means of the respective at least one function indicator 11, 12, 13. The function indicators 11, 12, 13 are, for example, two-color switchable LED signal lights, wherein a display color for displaying the respective error signal 14 for each phase contact 31, 32, 33 differs from a display color for displaying the normal measuring operation of the individual function indicators 11, 12, 13.

[0068] The module housing 10 of the measuring module 1 has a fastening element 15, which here is designed, for example, as a housing recess 16 for fastening the module housing 10 to the mounting rail T. Furthermore, the measuring module 1 has an interface 38 (indicated by a dashed square) together with a corresponding signal input / output 39 for transferring the digital measurement data acquired by the measuring sensors 20 (indicated by dotted rectangles) to an external device.

[0069] The communication module 6 serves here as an external device for receiving and storing the digital measurement data transmitted by the measuring module 1. The communication module 6 comprises a housing 60 with a fastening element 65, which is designed here, for example, as a housing recess 66 for fastening the housing 60 to the mounting rail T.

[0070] Furthermore, the communication module 6 comprises a signal input / output 69 and can be coupled to the measuring module 1 via a communication channel S for the data transmission of the acquired digital measurement data. The communication channel S is in Fig. 7 symbolized by a dashed double arrow S and is designed here as a wireless communication channel S between the signal input / output 39 of the measuring module 1 and the signal input / output 69 of the communication module 6. The communication module 6 has a data memory for storing the digital measurement data.

[0071] Fig. 8 shows an arrangement of a measuring device 100 comparable to that in Fig. 7 shown arrangement, where a mobile terminal 7, for example a notebook computer, serves as the communication module. This embodiment offers the advantage that, in addition to data storage, the mobile terminal 7 also enables particularly user-friendly evaluation of the digital measurement data. The communication channel S is in Fig. 8 symbolized by a dashed double arrow S and is designed here as a wireless communication channel S between the signal input / output 39 of the measuring module 1 and a signal input / output 79 of the mobile terminal 7. Furthermore, with regard to the description of the Fig. 8 shown measuring module 1 to the corresponding figure description of Fig. 7 referred to.

[0072] In the embodiment in which the module housing 10 of the measuring module 1 has at least one fastening element 15, which is a fastening eyelet or comprises such a fastening eyelet, the measuring module 1 can be fastened particularly flexibly in place to the cables and / or lines of the circuit to be measured or to any existing brackets, cable trays, and the like, wherein suitable additional assembly aids such as cable ties may be required for appropriate fastening to the one or more fastening eyes of the module housing 10. Analogous to the above, in an alternative embodiment, the communication module 6 can also have a housing 60 with at least one fastening element 65, which fastening element 65 is a fastening eyelet or comprises such a fastening eyelet.

[0073] Fig. 9 shows schematically an arrangement of a measuring system 110 according to the invention with a measuring module 1, a communication module 6, and a load break switch 5. With regard to the description of the Fig. 9 shown measuring module 1 and the communication module 6, reference is made to the corresponding figure description of Fig. 7 Deviating from the figure description of Fig. 7 can be found in Fig. 9 However, in the embodiment shown, the module housing 10 of the measuring module 1 and the housing 60 of the communication module 6 are detachably coupled to one another, wherein a coupling direction K is symbolized by a dashed, horizontal arrow K. In the case of a coupling K of the module housing 10 with the housing 60 of the communication module 6, the communication channel S can also be designed as a wire-based communication channel S, wherein the signal input / output 39 of the measuring module 1 and the signal input / output 69 of the communication module 6 are each designed as mutually corresponding plug / socket connections or each comprise such corresponding plug / socket connections.

[0074] The load break switch 5 shown here has a switch housing 50, three phase terminals 51, 52, 53 for connecting to a respective outer conductor L1, L2, L3 as well as three switch terminals 51.1, 52.1, 53.1 for connecting to a respective outgoing line and is designed to selectively switch on or off an electrical connection between a phase terminal 51, 52, 53 and a respective switch terminal 51.1, 52.1, 53.1, which corresponds to the respective phase terminal 51, 52, 53, wherein the three phase contacts 31, 32, 33 of the measuring module 1 are each shaped complementarily to the phase terminals 51, 52, 53 of the load break switch 5 in order to be able to be clamped in the phase terminals 51, 52, 53.

[0075] With a dashed vertical arrow K is in Fig. 9 a coupling direction K is indicated, in which the two components, namely the measuring module 1 and the load-break switch 5, can be coupled to one another, wherein the phase contacts 31, 32, 33 of the measuring module 1 are connected to or inserted into the phase terminals 51, 52, 53 of the load-break switch 5. The housing 50 of the load-break switch 5 has a fastening element 55, which here is designed, for example, as a housing recess 56 for fastening the switch housing 50 to the mounting rail T.

[0076] Alternatively or additionally, the housing 50 of the load-break switch 5 can also have at least one fastening element 55, which is a fastening eyelet or includes such a fastening eyelet. The aforementioned advantages regarding particularly flexible mounting of the housing using corresponding fastening eyes at the measurement location apply equally to the embodiment in which the housing 50 of the load-break switch 5 is equipped with suitable fastening eyes for mounting.

[0077] Fig. 10 shows an arrangement of a measuring system 110 comparable to that in Fig. 9 shown arrangement, where in contrast to Fig. 10 Here, a mobile device 7, for example, a smartphone, serves as the communication module. Data transmission between the measuring module 1 and the mobile device 7 takes place, for example, via a wireless communication channel S radio-based.

[0078] In the figures Fig. 9 und Fig. 10 In the arrangements shown, the measuring module 1 with its phase contacts 31, 32, 33 is clamped on the input side to the phase terminals 51, 52, 53 of the load-break switch 5. Such an arrangement offers the advantage that the measuring module 1 is connected to the outer conductors L1, L2, L3 and is supplied with power by them even when the load-break switch 5 is switched off.

[0079] It is also provided within the scope of the invention that instead of the Fig. 9 and / or in Fig. 10 In the arrangement shown, the measuring module 1 with its phase contacts 31, 32, 33 can be clamped on the output side to the switch terminals 51.1, 52.1, 53.1 of the load-break switch 5. With such an arrangement, which is not explicitly shown in the figures, it should be noted, however, that the measuring module 1 is not connected to the outer conductors L1, L2, L3 and is therefore not supplied with power by them when the load-break switch 5 is switched off. LIST OF REFERENCE SYMBOLS

[0080] 1Measuring module 5Load-break switch 6Communication module 7Mobile terminal device 10Measuring module housing, module housing 11First function indicator; first LED 12Second function indicator; second LED 13Third function indicator; third LED 14Error signal 15Fastening element 16Housing recess for mounting rail 20Measuring sensor 21First measuring sensor; first current measuring sensor 22Second measuring sensor; second current measuring sensor 23Third measuring sensor; third current measuring sensor 31First phase contact 32Second phase contact 33Third phase contact 34SMD spring contact 35Connection plate 36Temperature sensor 38Interface for transferring digital measurement data 39Signal input / output of the measuring module 50Load-break switch housing; Switch housing 51first phase terminal 52second phase terminal 53third phase terminal 51.1first switch terminal 52.2second switch terminal 53.3Third switch terminal 55Fastening element 56Housing recess for mounting rail 60Housing of the communication module 65Fastening element 66Housing recess for mounting rail 69Signal input / output of the communication module 79Signal input / output of the mobile terminal 100Measuring device 110Measuring system L1First outer conductor; first phase L2Second outer conductor; second phase L3Third outer conductor; third phase KCoupling direction (arrow) SCommunication channel (double arrow) TTanking rail; top hat rail.

Claims

1. Measuring module (1) for measuring at least one measured variable in a low-voltage network, wherein the measuring module (1) comprises a module housing (10), at least one phase contact (31, 32, 33) for connection to a respective line conductor (L1, L2, L3) and at least one measuring sensor (20, 21, 22, 23) for detecting at least one measured variable attributable to the respective line conductor (L1, L2, L3), wherein at least one function indicator (11, 12, 13) is provided for each phase contact (31, 32, 33), wherein the respective at least one function indicator (11, 12, 13) is arranged on the module housing (10), and wherein the at least one measured variable is selected from a group comprising: electrical current, electrical voltage, electrical power, ohmic resistance, energy consumption, power factor, efficiency factor, temperature of an electrical contact; and wherein the measuring module (1) is equipped for detecting two or more measured variables, which can preferably be detected simultaneously, characterized in that the measuring module (1) is set up to control the respective at least one function indicator (11, 12, 13) as a function of the at least one detected measured variable and to selectively indicate an overshoot or undershoot of at least one limit value of the at least one measured variable to be detected as an error signal (14) by means of the respective at least one function indicator (11, 12, 13), and in that the measuring module (1) is set up such that the actuation of the respective at least one function indicator (11, 12, 13) can be parameterized such that the at least one limit value of the at least one measured variable to be detected is predefined in an adjustable manner.

2. Measuring module (1) according to claim 1, characterized in that at least two phase contacts (31, 32, 33) are provided, wherein the at least two phase contacts (31, 32, 33) comprise a first phase contact (31) for connecting a first line conductor (L1) and a second phase contact (32) for connecting a second line conductor (L2), and wherein at least one first functional indicator (11) arranged on the module housing (10) is assigned to the first phase contact (31) and at least one second functional indicator (12) arranged on the module housing (10) is assigned to the second phase contact (32).

3. Measuring module (1) according to claim 1 or 2, characterized in that three phase contacts (31, 32, 33), consisting of a first phase contact (31), a second phase contact (32) and a third phase contact (33), are provided, wherein the first phase contact (31) is used to connect a first line conductor (L1), the second phase contact (32) is used to connect a second line conductor (L2) and the third phase contact (33) is used to connect a third line conductor (L3), and wherein at least one first function indicator (11) arranged on the module housing (10) is assigned to the first phase contact (31), at least one second function indicator (12) arranged on the module housing (10) is assigned to the second phase contact (32) and at least one third function indicator (13) arranged on the module housing (10) is assigned to the third phase contact (33).

4. Measuring module (1) according to one of claims 1 to 3, characterized in that the at least one function indicator (11, 12, 13) for each phase contact (31, 32, 33) comprises an LED signal light, preferably a two-color or multi-color switchable LED signal light.

5. Measuring module (1) according to one of claims 1 to 4, characterized in that at least two function indicators (11, 12, 13) are provided for each phase contact (31, 32, 33), wherein the at least two function indicators (11, 12, 13) are preferably each designed as LED signal lights, particularly preferably as two-color or multi-color switchable LED signal lights.

6. Measuring module (1) according to one of claims 1 to 5, characterized in that the module housing (10) has at least one fastening element (15), wherein the at least one fastening element (15) preferably is or comprises a fastening eyelet and / or a housing recess (16).

7. Measuring device (100) having at least one measuring module (1), preferably having a plurality of measuring modules (1), according to one of claims 1 to 6 and having a communication module (6), wherein the communication module (6) has a housing (60) and is coupled via signaling to the at least one measuring module (1) by means of a communication channel (5), in particular a wireless communication channel (5), wherein the at least one measuring module (1) has an interface (38) for transferring digital measurement data recorded by the at least one measurement sensor (20, 21, 22, 23) to the communication module (6), and wherein the communication module (6) has a data memory for storing the digital measurement data.

8. Measuring device (100) according to claim 7, characterized in that the communication module (6) comprises a mobile terminal device (7), preferably a smartphone and / or a notebook computer, or is a mobile terminal device (7).

9. Measuring device (100) according to one of claims 7 or 8, characterized in that the at least one measuring module (1) is integrated in the housing (60) of the communication module (6), or the at least one measuring module (1) and the communication module (6) are set up so that at least one module housing (10) can be detachably coupled (K) to the housing (60) of the communication module (6).

10. Measuring system (110) having at least one measuring module (1), preferably having a plurality of measuring modules (1), according to one of claims 1 to 6, or having a measuring device (100) according to one of claims 7 to 9, wherein the measuring system (110) further comprises a load-break switch (5), wherein the load-break switch (5) has a switch housing (50), at least one phase terminal (51, 52, 53) for connection to a respective line conductor (L1, L2, L3) and at least one switch terminal (51.1, 52.2, 53.3) for connection to one respective continuing line and is set up for the purpose of selectively switching on or off an electrical connection between the at least one phase terminal (51, 52, 53) and the at least one switch terminal (51.1, 52.1, 53.1), wherein the at least one phase contact (31, 32, 33) of the at least one measuring module (1) is shaped complementary to the at least one phase terminal (51, 52, 53) and / or to the at least one switch terminal (51.1, 52.1, 53.1) of the load-break switch (5) in order to be able to be clamped in the at least one phase terminal (51, 52, 53) or switch terminal (51.1, 52.1, 53.1).

11. Measuring system (110) according to claim 10, characterized in that the at least one measuring module (1) is integrated in the switch housing (50) of the load-break switch (5), or at least one measuring module (1) and the load-break switch (5) are set up so that at least one module housing (10) can be detachably coupled (K) to the switch housing (50) of the load-break switch (5).

12. Low-voltage distribution board having at least one measuring module (1), preferably having a plurality of measuring modules (1), according to one of claims 1 to 6, or having a measuring device (100) according to one of claims 7 to 9, or having a measuring system (110) according to one of claims 10 or 11.