CN116601507A - Electrical device for sensing the temperature of a hot spot of a switchgear - Google Patents
Electrical device for sensing the temperature of a hot spot of a switchgear Download PDFInfo
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- CN116601507A CN116601507A CN202080106789.2A CN202080106789A CN116601507A CN 116601507 A CN116601507 A CN 116601507A CN 202080106789 A CN202080106789 A CN 202080106789A CN 116601507 A CN116601507 A CN 116601507A
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- 238000003306 harvesting Methods 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 230000005672 electromagnetic field Effects 0.000 claims 1
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- 238000010586 diagram Methods 0.000 description 6
- 230000000712 assembly Effects 0.000 description 5
- 238000000429 assembly Methods 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000033001 locomotion Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
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- Gas-Insulated Switchgears (AREA)
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Abstract
Embodiments of the present disclosure relate to an electrical device for sensing a temperature of a hot spot of a switching device. The electrical device includes an energy harvester, a first interface terminal, and a wireless circuit. The energy harvester is configured to harvest energy of the switching device. The first interface terminal is configured to interface with a second interface terminal of the switching device to receive the first temperature signal from the second interface terminal. The first temperature signal is indicative of a first temperature sensed by a first temperature sensor in the switching device. The wireless circuit is coupled to the energy harvester and the first interface terminal and is configured to wirelessly transmit a first wireless signal with power provided from the energy harvester. The first wireless signal is associated with a first temperature signal. By utilizing embodiments herein, an electrical device may be replaced without powering down the switching device.
Description
Technical Field
Example embodiments of the present disclosure relate generally to a temperature sensing technology, and more particularly, to an electrical device, a circuit breaker, and a switching device for sensing a temperature of a hot spot of the switching device.
Background
Electrical devices, such as Medium Voltage (MV) switching devices, are widely deployed in electrical grids. The switching device may generate significant heat during operation, resulting in a significant increase in temperature in the switching device. An increase in temperature may lead to potentially serious damage. Thus, there is a need to monitor various locations in a switchgear that may accumulate heat and/or be affected by heat. These locations are often referred to as hot spots.
Traditionally, wireless temperature sensors are applied and installed near hot spots to handle MV switching devices. Wireless circuits including temperature sensors have limited life, possibility of failure, or upgrade requirements for various reasons, and replacement of the wireless circuit needs to be considered. However, in the event that the bus bar de-energizes the entire panel, such as by replacement of the wireless circuit at the bus bar joint, this may extend the outage area and may compromise cost economy. Accordingly, there is a need for an improved method for monitoring the temperature of hot spots in a switchgear.
Disclosure of Invention
Example embodiments of the present disclosure propose a solution for an electrical device for sensing a hotspot temperature in a switching device.
In a first aspect, an electrical device is provided. The electrical device includes an energy harvester, a first interface terminal, and a wireless circuit. The energy harvester is configured to harvest energy of the switching device. The first interface terminal is configured to interface with a second interface terminal of the switching device to receive the first temperature signal from the second interface terminal. The first temperature signal is indicative of a first temperature sensed by a first temperature sensor in the switching device. The wireless circuit is coupled to the energy harvester and the first interface terminal and is configured to wirelessly transmit the first wireless signal with power provided from the energy harvester. The first wireless signal is associated with a first temperature signal.
In a second aspect, a circuit breaker is provided. The circuit breaker includes a first component for a first phase. A first component for the first phase includes a first arm, a first energy harvester, a first interface terminal, and a first radio circuit. The first energy harvester is disposed on a side surface of the first arm and is configured to harvest energy of the switching device. The first interface terminal is configured to interface with a second interface terminal of the switching device to receive the first temperature signal from the second interface terminal. The first temperature signal is indicative of a first temperature sensed by a first temperature sensor in the switching device. The first radio circuit is disposed on a side surface of the first arm. The first wireless circuit is coupled to the first energy harvester and the first interface terminal and is configured to wirelessly transmit the first wireless signal with power provided from the first energy harvester. The first wireless signal is associated with a first temperature signal.
In a third aspect, there is provided a switching device comprising the circuit breaker of the second aspect.
In a fourth aspect, a method for manufacturing an electronic device is provided. The method includes providing an energy harvester, providing a first interface terminal and providing a wireless circuit. The energy harvester is configured to harvest energy of the switching device. The first interface terminal is configured to interface with a second interface terminal of the switching device to receive a first temperature signal from the second interface terminal, the first temperature signal being indicative of a first temperature sensed by a first temperature sensor in the switching device. The wireless circuit is coupled to the energy harvester and the first interface terminal and is configured to wirelessly transmit the first wireless signal with power provided from the energy harvester. The first wireless signal is associated with a first temperature signal.
A solution according to embodiments of the present disclosure is to enable temperature monitoring of hot spots in a switching device and replacement of sensors without powering down the switching device.
Drawings
The foregoing and other objects, features and advantages of the exemplary embodiments disclosed herein will become more readily apparent from the following detailed description, which proceeds with reference to the accompanying drawings. Several example embodiments disclosed herein are illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings and in which:
FIG. 1 illustrates a block diagram of an example environment in which some example embodiments of the disclosure may be implemented;
FIG. 2 illustrates a block diagram implementing an electrical device according to some example embodiments of the present disclosure;
fig. 3 illustrates a block diagram of a portion of a circuit breaker connecting a portion of a switching device according to some example embodiments of the present disclosure;
fig. 4 illustrates a flowchart of a method for manufacturing an electrical device, according to some example embodiments of the present disclosure.
Throughout the drawings, identical or corresponding reference numerals indicate identical or corresponding parts.
Detailed Description
The subject matter described herein will now be discussed with reference to several example embodiments. These embodiments are discussed only in order to enable those skilled in the art to better understand and thus practice the subject matter described herein, and are not meant to imply any limitation on the scope of the subject matter.
The terms "comprising" or "including" and variations thereof are to be construed as open-ended terms, which mean "including, but not limited to. The term "or" should be read as "and/or" unless the context clearly indicates otherwise. The term "based on" should be understood as "based at least in part on". The term "operably" refers to a function, action, motion or state that may be achieved through manipulation by a user or an external mechanism. The terms "one embodiment" and "an embodiment" should be understood as "at least one embodiment". The term "another embodiment" should be understood as "at least one other embodiment".
Unless specified or limited otherwise, the terms "mounted," "connected," "supported," and "coupled" and variations thereof are used broadly and encompass both direct and indirect mountings, connections, supports, and couplings. Furthermore, "connected" and "coupled" are not restricted to physical or mechanical connections or couplings. In the description below, the same reference numerals and signs are used to describe the same, similar or corresponding parts in the drawings. Other explicit and implicit definitions may be included below.
As described above, conventional methods for monitoring hot spot temperatures in MV switchgear generally require that the switchgear or at least a portion of the switchgear (e.g., a bus bar) need to be powered down or shut down in the event that a sensing device in the switchgear needs to be replaced. This can expand the outage area and correspondingly lose cost economy.
In some embodiments, an improved solution for temperature sensing is presented. By separating the circuit means for temperature sensing at different locations, no power down of the switching means is required. For example, a durable temperature sensor or temperature sensing probe may be provided in the switching device, which may be used for a long service life without replacement. Other circuit arrangements that may sometimes need replacement may be provided in an electrical device such as a circuit breaker. The electrical device may be detached or detached from the switching device without de-energizing the switching device.
Fig. 1 illustrates a block diagram of an example environment 100 that implements some example embodiments of the disclosure. The example environment 100 may include a switching device 20 and an electrical device 10. In one embodiment, the electrical device 10 may be a circuit breaker. Although the electrical device 10 is described below with reference to a circuit breaker, this is for illustrative purposes only and does not imply any limitation to the scope of the present disclosure. Other electrical devices, such as circuit breakers, that can be separated or detached from the switching device without de-energizing the switching device may also be employed.
In some embodiments, the electrical device 10 may include three-phase units or assemblies 30, 50, and 70 for three phases. One of the three assemblies 30, 50, and 70 corresponds to one of the three phases, and the three assemblies 30, 50, and 70 may have substantially the same or similar construction and operate in the same or similar manner. Alternatively, electrical device 10 may include one or more phase units or components for an electrical system including one or more phases. In one embodiment, the electrical device 10 may include one, two, or four phase units or components, and the electrical system may be a single phase, two phase, or four phase electrical system.
In one embodiment, the switching device 20 includes a first bus or cable 21, and a second bus or cable 22. The first temperature sensor 24 is attached to a surface of the first busbar or cable 21. Alternatively, the first temperature sensor 24 is provided on the inner surface of the tube 23, close to or adjacent to the first busbar 21, so that the first temperature sensor 24 can accurately sense the temperature of the first hot spot. In one embodiment, the first hot spot may be located at the junction between the first busbar 21 and the tube 23. The temperature sensor herein may comprise one of a thermistor, a thermal integrated circuit chip, or a thermal coupler. Other durable temperature sensors that may be used in a switching device for long periods of time may also be used.
Likewise, a second temperature sensor 26 is attached to a surface of the second busbar or cable 22. Alternatively, the second temperature sensor 26 is disposed on the inner surface of the tube 27, near or adjacent to the second busbar 22, such that the second temperature sensor 26 can accurately sense the temperature of the second hot spot. In one embodiment, the second hot spot may be located at the junction between the second busbar 22 and the tube 27. The temperature profile in the switching device 20 may be variable from place to place. Thus, the accuracy of temperature sensing is important for timely detection of hot spot faults. By providing a temperature sensor at or near the hot spot, overheating or failure of the hot spot can be detected timely and accurately.
In one embodiment, tubes 23 and 27 are each equipotential copper tubes. Other tubes or structures that are equipotential may also be used. A first wire connection 25 (e.g., copper wire) couples the first temperature sensor 24 to the electrical device 10 via an interface, which will be described in detail below. Likewise, a second wire connection 28 (e.g., copper wire) couples the second temperature sensor 26 to the electrical device 10 via another interface. Although copper wire is shown, this is for illustration only and does not imply any limitation on the scope of the disclosure. Other wires or connection means may also be applied. It should be understood that six connection lines and interfaces should be provided for the case of three phases.
In the event that the electrical device 10 needs to be repaired or replaced, the electrical device 10 may be pulled out of the switching device 20. Since the electrical device 10 is a circuit breaker in one embodiment, the electrical device 10 acts when there is a fault (e.g., a short circuit) in the switching device 20. During normal operation of the switching device 20, the electrical device 10 can be freely separated or pulled out from the switching device 20. Thus, if there are some problems with the temperature sensing circuit arrangement within the electrical device 10 and repair or replacement may be required, the electrical device 10 may be separated from the switching device 20 without de-energizing the switching device 20. The electrical device 10 may be assembled into the switching device 20 in the event that the circuit device is repaired or replaced. By doing so, the hot spot of the switching device 20 can be continuously monitored without stopping the switching device 20. In another embodiment, the electrical device 10 is an isolation switch for electrical isolation.
Fig. 2 illustrates a block diagram implementing an electrical device 30 according to some example embodiments of the present disclosure. In one embodiment, electrical device 30 is a component for one of the three phases. The electrical device 30 includes an energy harvester 32, a wireless circuit 34, and a second sensor 36. In some embodiments, the second sensor 36 may be omitted.
The energy harvester 32 is configured to harvest energy from the switching device 20. In one embodiment, the energy harvester 32 is a current transformer configured to convert energy of the alternating magnetic field within the switching device 20 into electrical power. Other means for harvesting energy within the switching device 20 may also be employed. For example, a thermoelectric generator or an electric field harvester may be applied.
The energy harvester 32 provides the converted electrical power to the wireless circuit 34 such that the wireless circuit 34 can operate with power from the energy harvester 32. In one embodiment, the wireless circuitry 34 may include power management circuitry, a controller such as a Micro Control Unit (MCU), radio frequency circuitry configured to wirelessly transmit signals indicative of temperature. The power management circuit or MCU may process the temperature signal sensed by the temperature sensor so that the temperature signal may be converted into a wireless signal suitable for wireless transmission.
The electrical device 30 may comprise a first interface terminal 13 configured to interface with the second interface 11 of the switching device 20. The first interface terminal 13 is electrically coupled to the wireless circuit 34 such that the wireless circuit 34 can receive the temperature signal sensed by the first sensor 24 in the switching device 20 via the first interface terminal 11 and the second interface terminal 13. In one embodiment, the first interface terminal 11 and the second interface terminal 13 are connected with the electrical device 30 inserted or assembled to the switching device 20. In the case where the electrical device 30 is pulled out from the switching device 20 or detached from the switching device 20, the first interface terminal 11 and the second interface terminal 13 are disconnected. In one embodiment, the first interface terminal 11 and the second interface terminal 13 may be one of a plug, a contact finger, or a pogo pin (pogo pin).
The energy harvester 32 and the wireless circuitry 34 may sometimes require maintenance or replacement. By separating the energy harvester 32 and the wireless circuit 34 from the durable first sensor 24 provided in the switching device 20, the temperature sensing circuit can be replaced or repaired as needed, as it is provided in the detachable circuit 30. In the event that the electrical device 30 is removed from the switching device 20, the switching device 20 may operate normally without power failure or shutdown.
Although only the first sensor 24 and the corresponding interface terminals 11 and 13 are shown in fig. 2, they are for illustrative purposes only and do not imply any limitation on the scope of the present disclosure. For example, it will be appreciated that in an embodiment, if the electrical device 30 is a circuit breaker, there is another temperature sensor, such as the temperature sensor 26, and a corresponding interface and connection line for sensing another hot spot in the switching device.
In one embodiment, the electrical device 30 further includes a second temperature sensor 36. In one embodiment, the second temperature sensor 36 may be one of a thermistor, a thermal integrated circuit chip, or a thermal coupler, and may be disposed at a location in the electrical device 30. In the case where the electrical device 30 is a circuit breaker, the second temperature sensor 36 may be disposed adjacent to the wireless circuit 34 at the side surface of the arm 41. The second temperature sensor 36 generates a second temperature signal indicative of a second temperature of a location near the movable contact of the circuit breaker.
Fig. 3 illustrates a block diagram of a portion of a circuit breaker connecting a portion of a switching device according to some example embodiments of the present disclosure. The circuit breaker may include three circuit breaking assemblies for three phases. For each phase, there are two arms that engage with the two terminals of the phase line so that the circuit interrupting assembly can be coupled between the two terminals of the phase line. For the sake of simplicity, only one arm 41 of the circuit breaking assembly of the circuit breaker is shown in fig. 3. It will be appreciated that the other arm of the circuit interrupting assembly may have a similar corresponding configuration while the other two phases may have a similar configuration.
The switching device may include various hot spots, such as a hot spot between the first busbar 21 and the tube 23 and a hot spot between the second busbar 22 and the tube 27. The first temperature sensor 24 is attached to a surface of the first busbar 21. Alternatively, the first temperature sensor 24 is provided on the inner surface of the tube 23, close to or adjacent to the first busbar 21, so that the first temperature sensor 24 can accurately sense the temperature of the first hot spot. The temperature sensor herein may comprise one of a thermistor, a thermal integrated circuit chip, or a thermal coupler. Other durable temperature sensors that may be used for long service life may be applied.
The first temperature sensor 24 is connected to the second interface terminal 11 by a wire 25. The lead 25 is disposed within the isopotential tube. In one embodiment, the tube is a copper tube and the wire 25 is a copper wire. Alternatively, other masking components of different shapes and materials are possible for tube 23, and other materials for wire 25 are also possible. In one embodiment, the second interface terminal 11 or the first interface terminal 13 comprises one of a plug, a contact finger, or a spring pin.
When the circuit breaker is in place, the arm 41 is fixed to the tube 23. For example, when at least a portion of the circuit breaker is inserted into the switchgear 20 to the recommended position, the arm 41 is fixed to the tube 23. Further, in this case, the first interface terminal 13 is automatically connected with the second interface terminal 11. The first interface terminal 13 is electrically coupled to the radio circuit 34 by a wire 43.
A current transformer 42 surrounds the arm 41 at a side surface of the arm 41 and is electrically coupled to the wireless circuit 34. The wireless circuit 34 is also electrically coupled to a second temperature sensor 36, which may be omitted in some embodiments. The wireless circuit 34 and the second temperature sensor 36 may be provided at a side surface of the arm 41. Although they are shown as being provided on the side surfaces of the arms 41, this is for illustrative purposes only and does not imply any limitation on the scope of the present disclosure. They may be provided at other locations, such as the inner surface of the arm 41.
Although arm 41 is shown in fig. 3 as a first circuit interrupting assembly for the first phase, it should be understood that the circuit interrupting assembly may have another arm of identical construction that includes a wireless circuit, an energy harvester, an interface terminal, and optionally a second sensor, etc. Thus, it will be appreciated that the components of the other half of the first circuit interrupting assembly and their relationship are the same as the half of the first circuit interrupting assembly shown in fig. 3.
Further, it should be appreciated that the circuit breaker may have a second circuit breaking assembly for the second phase and a third circuit breaking assembly for the third phase. In one embodiment, the second and third circuit breaking assemblies may have the same configuration as the first circuit breaking assembly. Thus, it will be appreciated that the components and the relationship between the components are the same as in the first circuit breaking assembly.
Fig. 4 illustrates a flowchart of a method 400 for manufacturing an electrical device, according to some example embodiments of the present disclosure. In one embodiment, the electrical device may be the electrical device 10 or 30 of fig. 1-3. Thus, the features described with reference to fig. 1-fig. may be applied to the method 400 of fig. 3.
In 402, an energy collector is provided. The energy harvester is configured to harvest energy of the switching device. In 404, a first interface terminal is provided. The first interface terminal is configured to interface with a second interface terminal of the switching device to receive a first temperature signal from the second interface terminal, the first temperature signal being indicative of a first temperature sensed by a first temperature sensor in the switching device.
In 406, a wireless circuit is provided. The wireless circuit is coupled to the energy harvester and the first interface terminal and is configured to wirelessly transmit the first wireless signal with power provided from the energy harvester. The first wireless signal is associated with a first temperature signal. Hereinafter, some example implementations of the subject matter herein will be listed.
Item 1. An electrical device is provided that includes an energy harvester configured to harvest energy of a switching device; a first interface terminal configured to interface with a second interface terminal of the switching device to receive a first temperature signal from the second interface terminal, the first temperature signal being indicative of a first temperature sensed by a first temperature sensor in the switching device; and a wireless circuit coupled to the energy harvester and the first interface terminal and configured to wirelessly transmit a first wireless signal with power provided from the energy harvester, the first wireless signal being associated with the first temperature signal.
Item 2. The electrical device of item 1, further comprising a second temperature sensor configured to generate a second temperature signal indicative of a second temperature of a location in the electrical device; wherein the wireless circuit is coupled to the second temperature sensor to wirelessly transmit a second wireless signal, the second wireless signal being associated with the second temperature signal.
Item 3. The electrical device of claim 1 or 2, further comprising an arm of the circuit breaker, wherein the energy harvester comprises a current transformer at a side surface of the arm, the current transformer configured to convert energy of the electric field inside the switching device into power provided to the energy harvester.
Item 4. The electrical device of any one of claims 1-3, wherein the wireless circuit is disposed adjacent to the current transformer at a side surface of the arm.
Item 5. The electrical device of any of claims 1-4, further comprising a second temperature sensor adjacent the wireless circuit at the side surface of the wall, the second temperature sensor configured to generate a second temperature signal indicative of a second temperature of a location near the movable contact of the circuit breaker.
Item 6. The electrical device of any one of claims 1-5, further comprising a first temperature sensor adapted to be disposed at or near a bus bar in the switching device and coupled to the second interface terminal through a connection line in an isopotential tube in the switching device.
Item 7. The electrical device of any of claims 1-6, wherein the first interface terminal comprises one of a plug, a contact finger, or a spring pin; and the first temperature sensor comprises one of a thermistor, a thermal integrated circuit chip, or a thermal coupler.
Item 8. A circuit breaker is provided that includes a first assembly for a first phase. The first assembly includes a first arm; a first energy harvester on a side surface of the first arm, the first energy harvester configured to harvest energy of the switching device; a first interface terminal configured to interface with a second interface terminal of the switching device to receive a first temperature signal from the second interface terminal, the first temperature signal being indicative of a first temperature sensed by a first temperature sensor in the switching device; and a first wireless circuit on a side surface of the first arm, the first wireless circuit coupled to the first energy harvester and the first interface terminal and configured to wirelessly transmit a first wireless signal with power provided from the first energy harvester, the first wireless signal associated with the first temperature signal.
Item 9. The circuit breaker of claim 8, wherein the first assembly further comprises a second arm; a second energy harvester on a side surface of the second arm, the second energy harvester configured to harvest energy of the switching device; a third interface terminal configured to interface with a fourth interface terminal of the switching device to receive a third temperature signal from the fourth interface terminal, the third temperature signal being indicative of a third temperature sensed by a third temperature sensor in the switching device; and a second wireless circuit on a side surface of the second arm, the second wireless circuit coupled to the second energy harvester and the third interface terminal and configured to wirelessly transmit a third wireless signal with power provided from the second energy harvester, the third wireless signal associated with the third temperature signal.
Item 10. The circuit breaker according to any one of claims 8-9, further comprising: a second assembly for the second phase, the second assembly comprising a fifth interface terminal configured to interface with a sixth interface terminal of the switching device to receive a fifth temperature signal from the sixth interface terminal, the fifth temperature signal being indicative of a fifth temperature sensed by a fifth temperature sensor in the switching device; and a seventh interface terminal configured to interface with an eighth interface terminal of the switching device to receive a seventh temperature signal from the eighth interface terminal, the seventh temperature signal being indicative of a seventh temperature sensed by a seventh temperature sensor in the switching device; and a third assembly for a third phase, the third assembly comprising: a ninth interface terminal configured to interface with a tenth interface terminal of the switching device to receive a ninth temperature signal from the tenth interface terminal, the ninth temperature signal being indicative of a ninth temperature sensed by a ninth temperature sensor in the switching device; and an eleventh interface terminal configured to interface with the twelfth interface terminal of the switching device to receive an eleventh temperature signal from the twelfth interface terminal, the eleventh temperature signal being indicative of an eleventh temperature sensed by an eleventh temperature sensor in the switching device.
Item 11. The circuit breaker of any of claims 8-10, wherein the first assembly for the first phase further comprises a second temperature sensor adjacent to the first wireless circuit at a side surface of the first arm, the second temperature sensor configured to generate a second temperature signal indicative of a second temperature of a location proximate to the movable contact of the circuit breaker.
Item 12. The circuit breaker according to any one of claims 8-11, further comprising a first temperature sensor adapted to be disposed at or near a bus bar in the switching device and coupled to the second interface terminal through a connection line in an isopotential tube in the switching device.
Item 13. The circuit breaker of any of claims 8-12, wherein the first interface terminal comprises one of a plug, a contact finger, or a spring pin; the first temperature sensor includes one of a thermistor, a thermal integrated circuit chip, or a thermal coupler.
Item 14. There is provided a switching device comprising a circuit breaker according to any one of claims 8-13.
Item 15. A method for manufacturing an electronic device is provided. The method comprises the following steps: providing an energy collector configured to collect energy of the switching device; providing a first interface terminal configured to interface with a second interface terminal of the switching device to receive a first temperature signal from the second interface terminal, the first temperature signal being indicative of a first temperature sensed by a first temperature sensor in the switching device; and providing a wireless circuit coupled to the energy harvester and the first interface terminal and configured to wirelessly transmit a first wireless signal with power provided from the energy harvester, the first wireless signal being associated with the first temperature signal.
Moreover, although operations are described in a particular order, this should not be construed as requiring that these operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results. In some cases, multitasking and parallel processing may be advantageous. Likewise, while several specific implementation details are included in the above discussion, these details should not be construed as limitations on the scope of the disclosure, but rather as descriptions of features specific to particular embodiments. Certain features that are described in the context of separate embodiments can also be implemented in combination in a single embodiment. On the other hand, various features that are described in the context of a single embodiment may also be implemented in multiple embodiments separately or in any suitable subcombination.
Although the subject matter has been described in language specific to structural features and/or methodological acts, it is to be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims.
Claims (15)
1. An electrical device (30), comprising:
an energy harvester (32) configured to harvest energy of the switching device (20);
a first interface terminal (13) configured to interface with a second interface terminal (11) of the switching device (20) to receive a first temperature signal from the second interface terminal, the first temperature signal being indicative of a first temperature sensed by a first temperature sensor (24) in the switching device (20); and
a wireless circuit (34) is coupled to the energy harvester (32) and the first interface terminal (13) and configured to wirelessly transmit a first wireless signal with power provided from the energy harvester (32), the first wireless signal being associated with the first temperature signal.
2. The electrical device (30) of claim 1, further comprising a second temperature sensor (36) configured to generate a second temperature signal indicative of a second temperature of a location in the electrical device;
wherein the wireless circuit (34) is coupled to the second temperature sensor (36) to wirelessly transmit a second wireless signal, the second wireless signal being associated with the second temperature signal.
3. The electrical device (30) of claim 1, further comprising an arm (41) of a circuit breaker,
wherein the energy harvester (32) comprises a current transformer (42) at a side surface of the arm (41), the current transformer (42) being configured to convert energy of an electromagnetic field inside the switching device (20) into the power provided to the energy harvester (32).
4. An electrical device (30) according to claim 3, wherein the wireless circuit (34) is arranged adjacent to the current transformer (42) at the side surface of the arm (41).
5. The electrical device (30) of claim 4, further comprising a second temperature sensor (36), the second temperature sensor (36) being adjacent to the wireless circuit (34) at the side surface of the arm (41), the second temperature sensor (36) being configured to generate a second temperature signal indicative of a second temperature of a location near a movable contact of the circuit breaker.
6. The electrical device (30) according to claim 1, further comprising the first temperature sensor being adapted to be arranged at or near a busbar in the switching device (20) and being coupled to the second interface terminal (11) by a connection line in an equipotential tube in the switching device (20).
7. The electrical device (30) of claim 1, wherein the first interface terminal (13) comprises one of a plug, a contact finger, or a pogo pin; and
the first temperature sensor includes one of a thermistor, a thermal integrated circuit chip, or a thermal coupler.
8. A circuit breaker, comprising:
a first component for a first phase, comprising:
a first arm;
a first energy harvester (32) on a side surface of the first arm, the first energy harvester (32) configured to harvest energy of the switching device (20);
a first interface terminal (13) configured to interface with a second interface terminal (11) of the switching device (20) to receive a first temperature signal from the second interface terminal (11), the first temperature signal being indicative of a first temperature sensed by a first temperature sensor (24) in the switching device (20); and
a first wireless circuit (34) on the side surface of the first arm, the first wireless circuit (34) coupled to the first energy harvester (32) and the first interface terminal (13) and configured to wirelessly transmit a first wireless signal with power provided from the first energy harvester (32), the first wireless signal being associated with the first temperature signal.
9. The circuit breaker of claim 8, wherein the first assembly further comprises:
a second arm;
a second energy harvester on a side surface of the second arm, the second energy harvester being configured to harvest energy of the switching device (20);
a third interface terminal configured to interface with a fourth interface terminal of the switching device (20) to receive a third temperature signal from the fourth interface terminal, the third temperature signal being indicative of a third temperature sensed by a third temperature sensor in the switching device (20); and
a second wireless circuit on the side surface of the second arm, the second wireless circuit coupled to the second energy harvester and the third interface terminal, and configured to wirelessly transmit a third wireless signal with power provided from the second energy harvester (32), the third wireless signal associated with the third temperature signal.
10. The circuit breaker of claim 9, further comprising:
a second component for a second phase comprising
A fifth interface terminal configured to interface with a sixth interface terminal of the switching device to receive a fifth temperature signal from the sixth interface terminal, the fifth temperature signal being indicative of a fifth temperature sensed by a fifth temperature sensor in the switching device (20); and
a seventh interface terminal configured to interface with an eighth interface terminal of the switching device to receive a seventh temperature signal from the eighth interface terminal, the seventh temperature signal being indicative of a seventh temperature sensed by a seventh temperature sensor in the switching device (20); and
a third assembly for a third phase, comprising:
a ninth interface terminal configured to interface with a tenth interface terminal of the switching device to receive a ninth temperature signal from the tenth interface terminal, the ninth temperature signal being indicative of a ninth temperature sensed by a ninth temperature sensor in the switching device (20); and
an eleventh interface terminal configured to interface with a twelfth interface terminal of the switching device to receive an eleventh temperature signal from the twelfth interface terminal, the eleventh temperature signal being indicative of an eleventh temperature sensed by an eleventh temperature sensor in the switching device (20).
11. The circuit breaker of claim 8, wherein the first assembly for the first phase further comprises a second temperature sensor adjacent the first wireless circuit (34) at a side surface of the first arm (41), the second temperature sensor (36) configured to generate a second temperature signal indicative of a second temperature of a location proximate to a movable contact of the circuit breaker.
12. Circuit breaker according to claim 8, further comprising the first temperature sensor being adapted to be arranged at or near a busbar in the switching device (20) and being coupled to the second interface terminal (11) by a connection line in an equipotential tube in the switching device (20).
13. The circuit breaker of claim 8, wherein the first interface terminal (13) comprises one of a plug, a contact finger, or a spring pin; and
the first temperature sensor includes one of a thermistor, a thermal integrated circuit chip, or a thermal coupler.
14. A switching device, comprising:
the circuit breaker according to any one of claims 8-13.
15. A method for manufacturing an electrical device, comprising:
providing an energy harvester (32), the energy harvester (32) being configured to harvest energy of the switching device (20);
-providing a first interface terminal (13), the first interface terminal (13) being configured to interface with a second interface terminal (11) of the switching device (20) to receive a first temperature signal from the second interface terminal, the first temperature signal being indicative of a first temperature sensed by a first temperature sensor (24) in the switching device (20); and
a wireless circuit (34) is provided, the wireless circuit (34) being coupled to an energy harvester (32) and the first interface terminal (13) and configured to wirelessly transmit a first wireless signal with power provided from the energy harvester (32), the first wireless signal being associated with the first temperature signal.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2020/130034 WO2022104632A1 (en) | 2020-11-19 | 2020-11-19 | Electric device for sensing temperatures of hotspots of a switchgear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116601507A true CN116601507A (en) | 2023-08-15 |
Family
ID=81708157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202080106789.2A Pending CN116601507A (en) | 2020-11-19 | 2020-11-19 | Electrical device for sensing the temperature of a hot spot of a switchgear |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4248228A4 (en) |
| CN (1) | CN116601507A (en) |
| WO (1) | WO2022104632A1 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005072166A2 (en) * | 2004-01-16 | 2005-08-11 | Composite Technology Corporation | Embedded sensors for aluminum conductor composite core cables |
| EP3044556B1 (en) * | 2013-09-11 | 2018-03-07 | 3M Innovative Properties Company | Systems and methods for monitoring temperature of electrical conductor |
| CN108562849B (en) * | 2018-03-07 | 2021-02-05 | Abb瑞士股份有限公司 | Self-powered detection device for switchgear |
-
2020
- 2020-11-19 CN CN202080106789.2A patent/CN116601507A/en active Pending
- 2020-11-19 WO PCT/CN2020/130034 patent/WO2022104632A1/en active Application Filing
- 2020-11-19 EP EP20961923.8A patent/EP4248228A4/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| EP4248228A4 (en) | 2024-08-21 |
| WO2022104632A1 (en) | 2022-05-27 |
| EP4248228A1 (en) | 2023-09-27 |
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