Modularized layout combination
Through modular layout combination, combined with independent overvoltage protection devices and measuring instruments, the problem of inflexible and high cost monitoring of overvoltage dischargers in the prior art is solved, and a low-cost and flexible monitoring function is achieved.
Patent Information
- Application Number
- CN202411860691.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2023-12-18
- Filing Date
- 2024-12-17
- Publication Date
- 2025-04-18
Smart Images
Figure CN119855091A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a modular layout combination. Background Art
[0002] In order to protect electrical installations, overvoltage protection devices are increasingly being installed. One example is a varistor, which becomes conductive when an overvoltage occurs and bypasses the overvoltage outside the electrical installation to be protected. Typically, such overvoltage events are caused by discharges, for example due to switching operations or lightning strikes, and are directed as pulse currents through the varistor (or other overvoltage protection device).
[0003] However, in the absence of an overvoltage event, the overvoltage protection device should essentially behave like an insulator.
[0004] However, degradation is to be expected due to aging of the varistor, environmental conditions (temperature, humidity, etc.) and use. This degradation usually results in a current flowing even when no overvoltage is present. This current is called leakage current. Typically, this leakage current is (initially) only a few hundred microamperes (μA). However, due to further aging and use, the leakage current may increase, leading to severe thermal heating and possibly even fire. In this case, modern overvoltage protection devices are equipped with thermal protection that disconnects the varistor from the corresponding circuit.
[0005] Aging manifests itself as a change in the current-voltage characteristic curve.
[0006] Total leakage current is also a possible indicator of aging.
[0007] Likewise, other surge arresters, such as spark gaps, also age.
[0008] For monitoring surge arresters, corresponding monitoring devices are available.
[0009] These monitoring devices either use fully integrated arrester and monitoring device combination modules or use separate screw-on components. The sensors are usually installed in a sensor module, which is located before the terminal blocks of the surge arrester. The connection lines to the surge protection device (SPD) are passed through the openings of the sensor module so that the current on these lines can be detected.
[0010] What all these methods have in common is that the measuring instruments are designed for specific surge arresters. The existing solutions are therefore on the one hand inflexible, since the appropriate device must always be used, and on the other hand this inflexibility leads to relatively high development and production costs due to the relatively small number of each device. Likewise, the necessity for bolted connections proves to be a disadvantage, since this leads to increased installation costs. Summary of the invention
[0011] Therefore, the present invention provides a desirable modular layout assembly device, which can provide measurement functions for various surge arresters at low cost to monitor aging conditions.
[0012] The implementation of this device is: A modular arrangement combination comprises an overvoltage protection device and a measuring instrument, wherein the measuring instrument has an independent housing and the overvoltage protection device has an independent housing, the overvoltage protection device and the measuring instrument are arranged directly adjacent to each other, wherein the measuring instrument has a pulse current sensor, which is arranged on a side facing the housing of the overvoltage protection device so that it can detect a pulse current flowing through the overvoltage protection device and through the housing, and the measuring instrument has at least one interface for providing the occurrence of the pulse current and / or information about the pulse current that has occurred.
[0013] A modular arrangement combination comprises an overvoltage protection device and a measuring instrument, wherein the overvoltage protection device and the measuring instrument are arranged directly adjacent to each other, the measuring instrument having a pulse current sensor, which is arranged so that it can detect a pulse current flowing through the overvoltage protection device, wherein the pulse current sensor is arranged at a spacing of less than 50 mm, or less than 25 mm, or less than 20 mm, or less than 15 mm relative to the overvoltage protection device, and the measuring instrument having at least one interface for providing information on the occurrence of the pulse current and / or on the pulse current that has occurred. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 is an external design diagram having a modular arrangement according to the invention of some aspects of an embodiment of the invention in an assembled state; Figure 2 is an exterior design diagram having a modular arrangement of aspects of an embodiment of the present invention in a partially assembled state; Figure 3 is a view of a portion of a modular device according to aspects of an embodiment of the present invention; Figure 4Schematic diagrams of logical or structural elements that enable modular arrangements of some aspects of embodiments of the present invention; and Figure 5 is a schematic diagram of modularly arranged logic or structural elements according to other aspects of embodiments of the present invention.
[0015] Reference Numbers List 1 combination; SPD N Overvoltage protection device; SPD L1..L3 Other overvoltage protection devices; M-meter; G M The housing of the measuring instrument; G SPDN Housing of overvoltage protection device; S PE Pulse current sensor; I / O M interface; DC M Interface for providing power to other devices; S T，i Internal temperature sensor; S T，e External temperature sensor; A socket R Locking device; SM sensor module. DETAILED DESCRIPTION
[0016] The present invention will be described in more detail below with reference to the accompanying drawings. It should be noted that different aspects are described, and these aspects can be used alone or in combination. That is, unless explicitly indicated as a pure alternative, any aspect can be used together with different embodiments of the present invention.
[0017] In addition, for simplicity, only one entity will usually be mentioned. Unless explicitly noted, the present invention may also include multiple related entities. Therefore, the use of the words "a", "an" and "some" is only to indicate that at least one entity is used in a simple embodiment.
[0018] In the methods described below, the individual steps may be arranged and / or combined in any order, as long as the context does not clearly indicate otherwise. In addition, these methods - unless otherwise clearly indicated - may be combined with each other.
[0019] Notes with numerical values are generally not to be understood as exact values, but rather include a tolerance of from + / -1% to + / -10%.
[0020] References to standards, specifications or the like in this application always refer at least to the standards, specifications or the like applicable at the filing date, i.e., if a certain standard / specification etc. is updated or replaced by a subsequent version, the present invention also applies thereto.
[0021] The present invention will be described below in the context of an overvoltage protection device, in particular a varistor. However, the present invention is not limited thereto.
[0022] In one embodiment of the present invention, Figure 1 and Figure 2 As shown, in an assembled combination 1 (with other devices), a modular layout combination is provided.
[0023] The modular arrangement combines an overvoltage protection device SPDN and a measuring device M.
[0024] In this context, in principle both fully modular arrangements and partially modular arrangements can be provided.
[0025] For example, Figure 1 and Figure 2 A combination is shown in FIG. 1 , that is, a plurality of overvoltage protection devices SPD are shown N , SPD L1 , SPD L2 , SPD L3 Likewise, the overvoltage protection device shown is in the form of a plug that is inserted into the socket A. However, this is not the core idea of the invention.
[0026] In an exemplary embodiment, the measuring device M has a separate housing G. M , while the overvoltage protection device SPD N With independent housing G SPDN .
[0027] Here, the overvoltage protection device SPD N and measuring device M are arranged directly adjacent to one another.
[0028] Measuring device M has pulse current sensor S PE , which is arranged so that it can detect the overvoltage protection device SPD N The pulse current flows through the possible shell G M , G SPDN .
[0029] If there is such a shell G M and G SPDN , then the pulse current sensor S PE Preferably placed facing the overvoltage protection device SPD N Shell G SPDNside.
[0030] The measuring device M has at least one interface I / O M , to provide the occurrence of a pulse current and / or information about a pulse current that has occurred.
[0031] In another exemplary embodiment, the pulse current sensor S PE At a distance of less than 50 mm, preferably less than 25 mm, more preferably less than 20 mm, particularly preferably less than 15 mm relative to the overvoltage protection device SPD N Arrangement.
[0032] like Figure 1 , 2 As shown in FIG. 4 , the combination may also have other devices, such as a sensor module S M Other sensors in the
[0033] According to one embodiment of the present invention (such as Figure 3 exemplarily shown in FIG. 1 ) a pulse current sensor S PE Arranged in ( Figure 3 The housing G of the measuring device M (not shown) M ) on the circuit board.
[0034] like Figure 3 Combination Figure 1 and 2 As shown in the overview, the pulse current sensor S PE It is arranged near the side of the housing, which is adjacent to the overvoltage protection device SPD. N The path of the current to be measured. Depending on the required measurement accuracy, the spacing can also be selected to be larger. However, as the spacing increases, the influence of other interfering AC fields increases, while the signal amplitude caused by the current to be measured decreases with increasing spacing.
[0035] In one embodiment of the present invention, the pulse current sensor S PE With air core coil, iron core coil or Rogowski coil. This also allows safe and precise measurement of high currents while achieving a simple construction. Rogowski coils also have the advantage that their position is independent of the internal cable to be measured and are insensitive to external fields.
[0036] According to one embodiment of the present invention, the interface I / O of the measuring instrument M M Types include, Ethernet, bus systems such as Profibus, Modbus, digital switch input / output, near field communication systems, especially WLAN, Bluetooth, ZiGBee, NFC. That is, the present invention allows connection to many different wired and wireless network topologies, so that it can adapt to a variety of application scenarios.
[0037] In another embodiment of the invention, the measuring device M also has its own status signaling device. For example, the operating state and / or fault state and / or current measured values and / or past measured values can be displayed by local acoustic or optical devices, such as acoustic or optical signal transmitters, (multicolor) LEDs and / or (electronic paper) displays, in order to inform the user of the operating state or aging conditions and / or to advise necessary (upcoming) replacement.
[0038] In another embodiment of the invention, the measuring device M can be removably mounted on a mounting rail R, for example, on a support rail. For this purpose, the measuring device M can have a locking device, with which the measuring device M can be locked or unlocked on the mounting rail (without tools). This allows the measuring device M to be (dis)assembled and disassembled quickly and economically.
[0039] According to one embodiment of the present invention, the measuring instrument M can be powered by a power supply interface. Similarly, or in addition, it is also conceivable that the measuring instrument M also has an interface DC M For supplying power to other devices. In particular, the measuring instrument M can also be connected via the interface I / O M powered by.
[0040] Since aging also has temperature dependence, it may be advantageous if the temperature is also detected in addition to the current. This can be not only the temperature inside the modular arrangement, but also in the case of surge arresters SPD. N In order to detect this, the modular arrangement in the embodiment of the present invention may have or at least be connected to at least one internal temperature sensor S T，i and / or an external temperature sensor S T，e With such sensors, it is also possible to monitor the temperature in a switchboard, for example.
[0041] According to another embodiment of the invention, the housing G M , G SPDN Provides touch protection (respectively).
[0042] The pulse current sensor can measure the current flowing through the overvoltage protection device SPD N In principle, this pulse current sensor can also be used to measure leakage current.
[0043] Although the Rogowski coil is used as a part of the pulse current sensor in the above description, the present invention is not limited thereto. In principle, other sensors such as Hall sensors, air-core coils or iron-core coils may also be used.
[0044] Furthermore, further sensors (not shown) may be present, such as voltage sensors, which can provide information about the quality of the grid or damage to the arrester due to temporary overvoltages and can be used together with the (leakage) current measurement for a more accurate aging assessment.
[0045] The present invention realizes an extremely flexible system.
[0046] In the modular arrangement according to the invention, the pulse current sensor S PE The overvoltage arrester SPD is arranged N On, the sensor S PE It is preferably as close as possible to the total current path of the arrester or the PE terminal, so that the total current of the arrester can be measured as selectively as possible.
[0047] This is relevant for almost all discharge processes in the arrester and can be used to indirectly infer the aging of the arrester via damage models.
[0048] Since there is no mechanical fastening between the arrester and the measuring device, in principle all arresters whose total current path is located in a similar position can be monitored.
[0049] If the position of the current path deviates, this can be compensated by means of calibration factors (by means of a suitable computing device CPU).
[0050] Although embodiments of the present invention are described with respect to measuring only a portion of a conductor and calculating the current of the unmeasured conductor, the present invention is not limited thereto.
[0051] The invention allows for a particularly space-saving design, thus leaving more space for other equipment, unlike existing solutions. Assembly is also made easier, as the modular arrangement is also less bulky overall.
Claims
1. A modular layout combination with an overvoltage protection device (SPD N ) and a measuring instrument (M), characterized in that The measuring instrument (M) has an independent housing (G M ) and the overvoltage protection device (SPD N ) has an independent housing (G SPDN ), the overvoltage protection device (SPD N ) and the measuring device (M) are arranged directly adjacent to one another, wherein the measuring device (M) has a pulse current sensor (S PE ), the pulse current sensor is arranged facing the overvoltage protection device (SPD N ) Shell (G SPDN ) side, enabling it to detect the voltage across the SPD N ) and through the housing (G M , G SPDN ) flows a pulse current, the measuring device (M) having at least one interface (I / O M ) for providing the occurrence of the pulse current and / or information about the pulse current that has occurred.
2. The modular layout assembly according to claim 1, characterized in that: The pulse current sensor (S PE ) is arranged in the measuring instrument (M) housing (G M ) on the circuit board.
3. A modular layout assembly according to any one of the preceding claims, characterized in that The housing (G M , G SPDN ) provide touch protection.
4. A modular layout combination with an overvoltage protection device (SPD N ) and a measuring instrument (M), characterized in that The overvoltage protection device (SPD N ) and the measuring device (M) are arranged directly adjacent to one another, the measuring device (M) having a pulse current sensor (S PE ), the pulse current sensor is arranged so that it can detect the voltage across the overvoltage protection device (SPD N ) flows a pulse current, wherein the pulse current sensor (S PE ) with a spacing of less than 50 mm, or less than 25 mm, or less than 20 mm, or less than 15 mm relative to the overvoltage protection device (SPD N ) arrangement, the measuring device (M) having at least one interface (I / O M ) to provide information about the occurrence of the pulse current and / or about the pulse current that has occurred.
5. A modular layout assembly according to any one of the preceding claims, characterized in that The pulse current sensor (S PE ) is an air-core coil, an iron-core coil or a Rogowski coil.
6. A modular layout assembly according to any one of the preceding claims, characterized in that The interface (I / O M ) types include: Ethernet, Profibus or Modbus bus systems, digital switch input / output, near field communication system, as well as WLAN, Bluetooth, ZiGBee, NFC.
7. A modular layout assembly according to any one of the preceding claims, characterized in that The measuring device (M) also has its own status signaling device.
8. A modular layout assembly according to any one of the preceding claims, characterized in that The measuring device (M) can be detachably mounted on a mounting rail (R).
9. A modular layout assembly according to any one of the preceding claims, characterized in that The measuring instrument (M) is powered via a power supply interface.
10. A modular layout assembly according to any one of the preceding claims, characterized in that The measuring device (M) also has an interface (DC M ).
11. A modular layout assembly according to any one of the preceding claims, characterized in that The measuring instrument (M) can be connected via the interface (I / O M )powered by.
12. A modular layout assembly according to any one of the preceding claims, characterized in that The measuring device (M) has at least one internal temperature sensor (S T，i ).
13. A modular layout assembly according to any one of the preceding claims, characterised in that The measuring instrument (M) can be connected to an external temperature sensor (S T，e )connect.