Device for measuring the temperature of a switching device and switching device

Abstract

Switchgear (200) and a device for measuring the temperature of the switchgear (200). The switchgear (200) comprises a busbar compartment (202) and a circuit breaker compartment (203), and the device comprises: at least one sensor (101) arranged at a busbar (201) in the busbar compartment (202) and adapted to sense the temperature of at least one predetermined location of the busbar (201); a transmission module (102) coupled to the at least one sensor (101) and adapted to transmit data representing the temperature of the at least one predetermined location; and a power supply module (103) adapted to power the at least one sensor (101) and the transmission module (102), wherein at least one of the transmission module (102) and the power supply module (103) is detachably arranged at an interface (204) between the circuit breaker compartment (203) and the busbar compartment (202). As the transmission module (102) and / or the power supply module (103) is / are detachably arranged at the interface (204) between the circuit breaker compartment (203) and the busbar compartment (202), the transmission module (102) and / or the power supply module (103) can be replaced individually. In this way, the replacement efficiency is significantly improved and the maintenance cost is reduced. Furthermore, the interface (204) where the transmission module (102) and / or the power supply module (103) is arranged allows the transmission module (102) and / or the power supply module (103) to be replaced without shutting down the entire busbar (201), which improves the reliability of the switchgear (200).

Description

TECHNICAL FIELD

[0001] Embodiments of the present disclosure generally relate to switchgear, and more particularly, to a device for measuring temperature of switchgear. BACKGROUND

[0002] In electrical components such as switchgear, heat is typically generated at locations where components such as busbars, cables and contact units are connected, at which locations local high temperatures, i.e. hotspots, are induced. Monitoring the temperature of these locations is an important factor to ensure the safety of the electrical components.

[0003] Monitoring the temperature of hotspots typically involves the installation of a measuring component such as a sensor, which is susceptible to possible bad assembly and over-maintenance operations. Furthermore, as the demand for intelligent control or monitoring of electrical components continues to increase, sensors with wireless modules are widely used in switchgear, especially in medium voltage switchgear. The wireless module is typically integrated with the sensor, capable of wirelessly transmitting data representing the temperature for health condition monitoring.

[0004] In some conventional solutions, separate arrangements of wireless modules and sensors have been proposed. Due to various reasons such as service life, damage or change of wireless transmission protocol, it is often necessary to replace the wireless module. However, the current solutions typically employ an integrated design of the wireless module with the busbar, and it needs to be replaced together with the busbar. Furthermore, the entire circuit where the switchgear is located needs to be de-energized. SUMMARY

[0005] Embodiments of the present disclosure provide a device for measuring temperature of switchgear.

[0006] In a first aspect, a device for measuring temperature of switchgear is provided. The switchgear comprises a busbar compartment and a circuit breaker compartment, and the device comprises at least one sensor arranged at a busbar in the busbar compartment and adapted to sense temperature of at least one predetermined location of the busbar; a transmission module coupled to the at least one sensor and adapted to transmit data representing the temperature of the at least one predetermined location; and a power module adapted to supply power to the at least one sensor and the transmission module, wherein at least one of the transmission module and the power module is detachably arranged at an interface between the circuit breaker compartment and the busbar compartment.

[0007] With the transmission module and / or the power supply module being detachably arranged at the interface between the circuit breaker compartment and the busbar compartment, the transmission module and / or the power supply module can be replaced individually. In this way, the replacement efficiency is significantly improved and the maintenance costs are reduced. Furthermore, the interface at which the transmission module and / or the power supply module are arranged allows the replacement of the transmission module and / or the power supply module without switching off the entire busbar, which improves the reliability of the switchgear.

[0008] In some embodiments, the device further comprises a connector arranged at the interface and adapted to be detachably connected to at least one of the transmission module and the power supply module. In this way, at least one of the transmission module and the power supply module can be more easily replaced, thereby further improving the replacement efficiency.

[0009] In some embodiments, the connector is connected to at least one of the transmission module and the power supply module without the need for fasteners. This arrangement further facilitates the mechanized replacement of at least one of the transmission module and the power supply module, in particular further improving the safety of the switchgear during replacement.

[0010] In some embodiments, the connector is connected to at least one of the transmission module and the power supply module by magnetic attraction or plug-in connection. In this way, at least one of the transmission module and the power supply module can be replaced by simple mechanical means, thereby further improving the replacement efficiency.

[0011] In some embodiments, the device further comprises a housing for accommodating at least one of the transmission module and the power supply module. This arrangement increases the integration of the device.

[0012] In some embodiments, the housing comprises a first magnetic portion and the connector comprises a second magnetic portion adapted to be attracted by the first magnetic portion for connection to the housing. As a result, at least one of the transmission module and the power supply module can be easily connected to the connector, further facilitating the installation of the device.

[0013] In some embodiments, the connector comprises at least one radial hole and the housing comprises at least one insertion portion adapted to be inserted into the corresponding radial hole for connecting the housing to the connector. In this way, at least one of the transmission module and the power supply module can be easily and reliably connected to the connector, further facilitating the installation of the device.

[0014] In some embodiments, the housing further comprises at least one coupling mechanism coupled to the corresponding insertion portion and adapted to change the insertion depth of the insertion portion in the radial hole in response to the insertion portion being pressed. In this way, at least one of the transmission module and the power supply module can be replaced by simple mechanisms, thereby further improving the replacement efficiency.

[0015] In some embodiments, the connector is arranged in a spout around the fixed contact of the circuit breaker in the circuit breaker compartment. This arrangement can improve the stability of the device.

[0016] In some embodiments, the power module is adapted to draw power from the fixed contact by induction and to supply power to the transmission module and the at least one sensor. In this way, the device can continuously sense the temperature and transmit data representing the temperature in a maintenance-free manner.

[0017] In some embodiments, the power module is adapted to draw power from an electric field formed around the fixed contact and to supply power to the transmission module and the at least one sensor. This arrangement can further simplify the structure of the device, in particular the power module.

[0018] In a second aspect, a switching device is provided. The switching device comprises a device as in the first aspect described above.

[0019] It should be understood that the summary is not intended to identify key or essential features of embodiments of the disclosure or to delineate the scope of the disclosure. Other features, aspects, and advantages of the disclosure will become apparent from the following description, taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0020] The above and other objects, features and advantages of the present disclosure will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which like reference characters designate the same elements throughout the drawings.

[0021] Figure 1 A simplified schematic diagram of a portion of a switching device according to an embodiment of the present disclosure is shown;

[0022] Figure 2 A simplified schematic diagram of a device according to an embodiment of the present disclosure is shown; and

[0023] Figures 3 to 6 A perspective view of a device for measuring the temperature of a switching device according to an embodiment of the present disclosure is shown.

[0024] Throughout the drawings, the same or similar reference characters are used to designate the same or similar elements. DETAILED DESCRIPTION

[0025] The present disclosure will now be discussed with reference to several example embodiments. It should be understood that the discussion of these embodiments is merely meant to provide a better understanding of the present disclosure and to enable the practitioner to better utilize the present disclosure, and is not meant to suggest any limitation as to the scope of the subject matter.

[0026] As used herein, the term "includes" and its variants are to be read as open-ended terms that mean "including, but not limited to." The term "based on" is to be understood as "based, at least in part, on." The terms "a" and "an" are to be construed to cover "one or more" unless explicitly stated otherwise. The term "another" is defined as "at least one." The terms "first," "second," and the like can refer to different or same objects. Other explicit and implicit definitions can be included below. The definition of the term is consistent throughout the specification unless the context clearly indicates otherwise.

[0027] The health status of an electrical device, such as a switching device, is one of the most important issues of concern to users. As basic data for the health status, monitoring the temperature of the switching device is essential in electrical products. In addition, the demand for temperature monitoring in power distribution switching devices, especially hot spots of busbar joints, cable joints, and circuit breaker (CB) arm joints, requires the installation of measurement components such as sensors, which are susceptible to possible poor assembly and long overdue maintenance operations.

[0028] In addition, with the development of technology, sensors with wireless modules are widely used in switching devices, especially medium-voltage switching devices. The wireless module typically integrated with the sensor is capable of wirelessly transmitting data representing the temperature for health status monitoring.

[0029] However, for some newly designed switching devices with more compact space in each compartment, it is difficult to find a net space for each hot spot to install a sensor integrated with a wireless module, which will also experience high risk in medium tests. Even if the sensor with an integrated wireless module can be installed in a compact space, the wireless module is often damaged due to its proximity to high temperatures of hot spots.

[0030] Some conventional technical solutions have been proposed involving separate arrangements of wireless modules and sensors. Compared with the sensor, the wireless module typically has a relatively short service life and is prone to failure, which requires timely replacement of the wireless module. However, the current technical solutions typically employ an integrated design of the wireless module with the busbar, and the wireless module needs to be replaced together with the busbar, which increases the difficulty of replacement and thus reduces the maintenance efficiency. In addition, the entire switching device, such as the main busbar and its branch busbars, and thus the entire circuit where the switching device is located needs to be de-energized. This leads to further reduction in maintenance efficiency and the risk of damaging loads in the circuit and injuring personnel.

[0031] To solve or at least partially solve the above and other potential problems, embodiments of the present disclosure provide a device 100 for measuring the temperature of a switching device 200. Figure 1 and 2A simplified schematic diagram of a portion of a switchgear 200 and a device 100 according to embodiments of the present disclosure is shown, respectively.

[0032] The switchgear 200 as described herein is used to control, regulate and switch on or off circuits in a power system. The switchgear 200 is directly linked to the power supply system. For example, the switchgear 200 is typically placed at the high voltage side and the low voltage side of a power transformer and is used to de-energize the equipment for testing and maintenance and to clear faults.

[0033] For safety reasons, the switchgear 200 is typically a metal clad compartment design, with all high voltage compartments, i.e. the circuit breaker compartment 203 and the busbar compartment 202, etc. separated by metal partitions. Figure 1 A simplified schematic diagram of a portion of the switchgear 200 including the circuit breaker compartment 203 and the busbar compartment 202 is shown. The circuit breaker compartment 203 typically has an automatic shutter arranged at the interface 204 between the circuit breaker compartment 203 and the busbar compartment 202. The shutter can be opened and closed by a mechanical drive of the circuit breaker. The interface 204 is typically formed by a nozzle arranged to at least partially enclose the fixed contact 205 of the circuit breaker and made of an insulating material. In addition to the circuit breaker compartment 203 and the busbar compartment 202, the switchgear 200 can also include a metering compartment and a cable and cable box compartment. The compartments in the switchgear 200 have suitable access for maintenance and provide appropriate interlocks.

[0034] To access the different compartments during maintenance, different requirements need to be met. For example, to access the busbar compartment 202, the entire switchgear 200 including the main busbar 206 and the branch busbars 201 needs to be de-energized. In many applications, the main busbar 206 is shared by an entire row of switchgears, i.e. including multiple switchgears. When the busbar compartment 202 of a certain switchgear is being serviced, the switchgears in the entire row need to be de-energized, which has a significant impact. For some other compartments, only the corresponding circuit to be maintained needs to be de-energized instead of the entire switchgear 200 or the entire row of switchgears. For example, in the case where the circuit breaker compartment 203 or the interface 204 between the circuit breaker compartment 203 and the busbar compartment 202 is operated by an operating device, only the circuit where the damaged component to be replaced is located, e.g. the corresponding phase, needs to be de-energized, without de-energizing the main busbar 206 or even opening the busbar compartment. In this way, the maintenance efficiency can be significantly improved and the power outage time can be shortened, thereby reducing the loss caused by the maintenance.

[0035] It should be understood that the above only schematically describes some example configurations of the switchgear 200 without implying any limitation on the scope of the present disclosure. Any other suitable arrangement or form of the switchgear 200 is also possible. For example, in some embodiments, the switchgear 200 can also be an armored switchgear 200 which comprises the circuit breaker compartment 203, the busbar compartment 202 and the withdrawable circuit breaker arranged in the circuit breaker compartment 203.

[0036] The device 100 according to embodiments of the present disclosure can be applied to the switchgear 200 as above in order to detect the temperature of the hot spot of the switchgear in a maintenance-friendly manner.

[0037] Figure 2 A simplified schematic diagram of the device 100 according to embodiments of the present disclosure is shown. As shown, the device 100 comprises at least one sensor 101, a transmission module 102 and a power module 103. The at least one sensor 101 is arranged at the busbar 201 in the busbar compartment 202. The busbar 201 mentioned here can comprise a branch busbar 201, such as an upper branch busbar 201 or a lower branch busbar 201 connected to a circuit breaker. For example, a plurality of sensors 101, such as at least two sensors 101 can be respectively applied to the hot spot of the upper branch busbar 201 and / or the lower branch busbar 201 of a phase in order to sense the temperature of the hot spot. Figure 1 It is schematically shown that two sensors 101 are arranged at the hot spot located at or adjacent to the busbar joint and the CB arm joint.

[0038] It should be understood that the above embodiments of applying the at least one sensor 101 to the upper branch busbar 201 or the lower branch busbar 201 are only for illustrative purposes without implying any limitation on the scope of the present disclosure. Any other suitable arrangement is also possible. For example, in some embodiments, the at least one sensor 101 can also be arranged on the main busbar 206 and / or in the interface 204, such as the nozzle of a circuit breaker. In the following, the concepts of the present disclosure will mainly be described by taking the sensors 101 arranged at the hot spot of the branch busbar 201 as an example. The embodiments of the sensors 101 arranged at other positions are also similar and will not be described separately.

[0039] The sensor 101 is separate from the transmission module 102. According to embodiments of the present disclosure, one transmission module 102 can be coupled to one or more than one sensor 101. Specifically, the transmission module 102 is coupled to the at least one sensor 101 via a cable. In this way, the transmission module 102 can obtain data representing the temperature from the at least one sensor 101 and transmit the data wirelessly to, for example, a control unit of the switchgear 200 or an external device such as a computer or even a mobile phone.

[0040] As such, the transmission module 102 can be arranged away from predetermined locations where high temperatures usually occur. As such, the layout in the switchgear 200 tends to be more rational, improving safety and maintenance efficiency. Furthermore, one transmission module 102 can be coupled to one or more sensors 101, resulting in low cost and higher installation efficiency.

[0041] In some embodiments, the data representing temperature from the sensor 101 can be transmitted in the form of a digital pulse signal. For example, in some embodiments, the transmission module 102 or its counting unit can obtain the data representing temperature by counting the number of pulses over a predetermined time period. In this way, the data can be transmitted to the transmission module 102 more efficiently and without interference.

[0042] It should be appreciated that the above embodiments in which the data can be transmitted in the form of a digital pulse signal are merely illustrative and do not imply any limitation on the scope of the present disclosure. Any other suitable manner or form is also possible. For example, in some alternative embodiments, the data representing temperature from the sensor 101 can be transmitted in the form of an analog signal. In these embodiments, an A / D unit can be provided in the transmission module 102 or between the transmission module 102 and the sensor 101.

[0043] In some embodiments, the transmission module 102 can transmit the data via any appropriate wireless transmission method, including but not limited to at least one of Wi-Fi, Bluetooth, wireless personal area network, Z-wave, Bluetooth Low Energy (BLE), 6LoWPAN, Near Field Communication (NFC), Wi-Fi Direct, Global System for Mobile Communications (GSM), LTE, Narrow Band Internet of Things (NB-IoT), or LTE-M.

[0044] It should be appreciated that the above embodiments in which the transmission module 102 transmits the data wirelessly are merely illustrative and do not imply any limitation on the scope of the present disclosure. Any other suitable manner or form is also possible. For example, in some alternative embodiments, the transmission module 102 can also transmit the data to the external device through an optical fiber. As a result, the data can be transmitted faster and more reliably.

[0045] The power module 103 can supply power, i.e. provide electricity, to at least one sensor 101 and the transmission unit. For example, in the case where the power module 103 is arranged at the interface 204 between the breaker compartment 203 and the busbar compartment 202, i.e. at the pipe mouth, the power module 103 can draw electricity from the fixed contact 205 arranged in the pipe mouth. The electricity can then be provided to the transmission module 102 and the at least one sensor 101 through a cable. As such, no additional power pack, e.g. battery, is needed, which facilitates miniaturization of the device 100.

[0046] In some embodiments, the power module 103 can comprise an induction unit (not shown). The induction unit can be a core having a coil provided around the stationary contact 205 in the bushing. In this way, the induction unit is able to draw power from the stationary contact 205 by induction. The induction unit can further comprise a voltage regulation unit coupled to the induction unit to regulate the voltage to meet the requirements of the at least one sensor 101 and the transmission module 102. For example, the voltage regulation unit can convert the voltage amplitude to 3.3 V for use by the sensor 101 and the transmission module 102.

[0047] It should be appreciated that the above embodiments of the power module 103 drawing power by induction are merely illustrative and do not imply any limitation on the scope of the present disclosure. Any other suitable means are also possible. For example, in some alternative embodiments, the power module 103 can also draw power from the electric field formed around the stationary contact 205 from the stationary contact 205. In this way, the power module 103 does not need to be arranged around the stationary contact 205 but only needs to be disposed at one side thereof, thereby facilitating a more compact arrangement of the device 100. In the following, the concepts of the present disclosure will mainly be described with the power module 103 drawing power by induction as an example. The embodiments of the power module 103 drawing power from the electric field are also similar and will not be described separately below.

[0048] Compared to conventional solutions, according to embodiments of the present disclosure, at least one of the transmission module 102 and the power module 103 is detachably arranged at the interface 204 between the circuit breaker compartment 203 and the busbar compartment 202. In this way, the transmission module 102 and / or the power module 103 can be replaced individually, resulting in significantly improved replacement efficiency and reduced maintenance costs. Furthermore, the interface 204 where at least one of the transmission module 102 and the power module 103 is arranged allows the transmission module 102 and / or the power module 103 to be replaced without shutting down the entire busbar 201, which improves the reliability of the switchgear 200.

[0049] In some embodiments, the device 100 can be used in an existing switchgear 200 having a plate-like busbar 201. For example, in each phase of the upper branch or the lower branch, a plurality of sensors 101 can be arranged at hotspots or in the vicinity of the hotspots at the busbar joints, cable joints, or CB arm joints. Meanwhile, one transmission module 102 coupled to the plurality of sensors 101 via a cable can be arranged at the interface 204. The cable and / or the plurality of sensors 101 can be arranged in an additional tube or sleeve extending along the plate-like busbar 201. Such an arrangement is more advantageous for the retrofit of the existing switchgear 200 to obtain more accurate temperature measurements.

[0050] In some alternative embodiments, the apparatus 100 can also include a tube made of copper, which can be used as at least a portion of the busbar 201. At least a portion of the cable and the at least one sensor 101 can be arranged in the tube, as shown in Figure 1 Thus, the sensor 101 can be arranged closer to the hot spot to obtain more accurate temperature values. In some embodiments, all the cable and the at least one sensor 101 are arranged in the tube to avoid the concentration of electric charges at sharp corners, thereby improving the stability of the apparatus 100.

[0051] Further, the arrangement of the cable and a portion of the sensor 101 in the tube reduces the number or size of exposed external components. Here, the external components refer to components disposed outside the busbar 201. To avoid the concentration of electric charges at sharp corners, the fewer the external components, the better, except for the necessary components.

[0052] According to embodiments of the present disclosure, the reduction of external components can effectively reduce the possibility of the concentration of electric charges at sharp corners, thereby further improving the safety of the switchgear 200. Further, for the portion of the cable or the sensor 101 that cannot be hidden in the tube, an additional tube made of other suitable materials can be provided to cover the portion of the cable or the sensor 101 to avoid the concentration of electric charges at sharp corners.

[0053] To implement the above arrangement, for existing switchgears 200, the busbar 201 of the upper branch or the lower branch can be replaced with a tube made of copper. For example, Figure 1 The apparatus 100 shown in can be used to replace the existing plate-shaped busbar 201 of the upper branch. For newly developed switchgears 200, the busbar 201 of the upper branch or the lower branch can directly adopt a tube made of copper. In this way, the layout in the switchgear 200 tends to be more reasonable, improving safety and maintenance efficiency.

[0054] Figures 3 to 6 A perspective view of the apparatus 100 for measuring the temperature of the switchgear 200 according to embodiments of the present disclosure is shown. As shown in Figures 3 to 6 In some embodiments, both the transmission module 102 and the power supply module 103 can be detachably arranged at the interface 204, such as in the pipe opening of the circuit breaker. In some embodiments, as shown in Figures 3 to 6 The apparatus 100 can also include a housing 105 for accommodating the transmission module 102 and the power supply module 103. When it is necessary to replace the transmission module 102 and / or the power supply module 103, the maintenance personnel can directly replace the old housing 105 with a new one. In this way, system integration and maintenance efficiency are improved.

[0055] In some embodiments, the housing 105 can include two parts, i.e., a first part for accommodating the transmission module 102 and a second part for accommodating the power module 103. For example, the first and second parts can be integrally formed by injection molding. Each of the first and second parts can have a suitable shape to accommodate the corresponding module, i.e., the transmission module 102 or the power module 103. For example, as shown in Figures 3 to 6 the second part can be a ring shape for accommodating the inductive unit of the power module 103, and the first part can be a portion radially protruding from the second part. In this way, the interference of the power module 103 to the data transmission of the transmission module 102 can be minimized.

[0056] In some embodiments, the first and second parts of the housing 105 can also be separately formed and assembled together to form the housing 105. For example, the second part can be coupled to the first part by a snap connection or fasteners to form the housing 105. As a result, the first and second parts of the housing 105 can be manufactured in a cost-effective manner. Furthermore, in the event of a failure, the first part or the second part can be replaced individually, further reducing the maintenance cost.

[0057] It should be understood that the above-described embodiments in which the power module 103 and the transmission module 102 are arranged in one housing 105 are for illustrative purposes only, and do not imply any limitation on the scope of the present disclosure. Any other suitable arrangement or structure is also possible. For example, in some alternative embodiments, considering that the transmission module 102 is more prone to failure, the power module 103 can be fixedly arranged and the transmission module 102 is detachably arranged in the spout. That is, the power module 103 and the transmission module 102 can be arranged in separate housings that are electrically coupled to each other by a cable or plug-and-socket connection. In this way, the maintenance cost can be further reduced.

[0058] To further facilitate the detachable connection between the sensor 101 and the housing 105 for accommodating the transmission module 102 and / or the power module 103, in some embodiments, the device 100 can further include a connector 104 arranged at the interface 204, e.g., at least partially enclosing the fixed contact 205 in the spout. The connector 104 can be connected to the sensor 101 by, for example, a cable. The housing 105 for accommodating the transmission module 102 and / or the power module 103 can be coupled to the connector 104. The connector 104 and the housing 105 can have corresponding interfaces, e.g., a plug and a socket, to achieve the electrical connection between the sensor 101 and the housing 105.

[0059] In some embodiments, the connector 104 can be suitably shaped to fit the peripheral shape of the fixed contact 205, as shown in Figure 3 and 5 For example, as shown inFigure 3 As shown, in some embodiments, the portion of the connector 104 used to arrange the fixed contact 205 can be cylindrical. Therefore, the portion of the connector 104 that contacts the fixed contact 205 can have a corresponding cylindrical shape to match the outer shape of the fixed contact 205.

[0060] like Figure 5 As shown, in some alternative embodiments, the portion of the connector 104 used to arrange the fixed contact 205 can be conical. Therefore, the portion of the connector 104 that contacts the fixed contact 205 can have a corresponding conical shape to match the peripheral shape of the fixed contact 205. In this way, the device 100 can be applied to various types of switching devices 200 with different fixed contacts 205, further improving the applicability of the device 100.

[0061] In some embodiments, to further facilitate the replacement of the power module 103 and / or the transmission module 102, the connector 104 may be connected to the power module 103 and / or the transmission module 102 without fasteners. For example, in some embodiments, the connector 104 may be connected to the power module 103 and / or the transmission module 102 by magnetic attraction.

[0062] Specifically, in some embodiments, the housing 105 may include a first magnetic portion 1051, and the connector 104 may include a second magnetic portion 1041. Here, a magnetic portion refers to a magnetic or iron portion capable of interacting with another magnet. For example, in some embodiments, one of the first and second magnetic portions 1051, 1041 may be a first magnet, while the other may be an iron component or a second magnet that can be attracted by the first magnet. As a result, the housing 105, having the transmission module 102 and / or power module 103, can be easily connected to the connector 104, further facilitating the installation of the device 100.

[0063] It should be understood that the above embodiments of connector 104 connecting to power module 103 and / or transmission module 102 are for illustrative purposes only and do not imply any limitation on the scope of this disclosure. Any other suitable arrangement or structure is also possible. For example, in some alternative embodiments, connector 104 may also be connected to power module 103 and / or transmission module 102 via a plug-in connection, such as... Figure 6 As shown.

[0064] Specifically, in some embodiments, such as Figure 6As shown, the connector 104 can include at least one radial hole 1042. For example, the connector 104 can include three radial holes 1042 arranged circumferentially around the fixed contact 205. Correspondingly, the housing 105 can include at least one insertion portion 1052, for example, three insertion portions 1052, adapted to be inserted into the corresponding radial hole 1042. In this way, the housing 105 can be connected to the connector 104 without fasteners.

[0065] To further facilitate the operation of the insertion portion 1052, in some embodiments, the housing 105 can further include at least one coupling mechanism 1053 coupled to the corresponding insertion portion 1052. In response to the insertion portion 1052 being pressed radially, for example, the coupling mechanism 1053 can be able to change the insertion length of the insertion portion 1052 in the radial hole 1042.

[0066] For example, in response to each pressure applied on the insertion portion 1052, the insertion portion 1052 can engage with different parts of the coupling mechanism 1053. In this way, the insertion length of the insertion portion 1052 in the radial hole 1042 can be switched between zero and a predetermined length. At the predetermined length, the insertion portion 1052 can be fully inserted into the corresponding hole to ensure a reliable connection between the connector 104 and the housing 105. In some embodiments, the insertion portion 1052 and the coupling mechanism 1053 are somewhat similar to the pressing mechanism of a ballpoint pen.

[0067] As can be seen from the above description, whether it is magnetic attraction or plug-in connection, the housing 105 can be connected to the connector 104 without fasteners. This allows the power module 103 and / or the transmission module 102 to be replaced by a simple mechanism. In this way, it further enables the power module 103 and / or the transmission module 102 to be replaced without the need to power off the busbar, and further improves the safety of the device 100 and the switchgear 200. It should be understood that in some embodiments, the housing 105 can also be connected to the connector 105 with fasteners such as screws, bolts, etc.

[0068] It should be understood that the above detailed embodiments of the present disclosure are only used to illustrate or explain the principles of the present disclosure, and are not intended to limit the present disclosure. Therefore, any modifications, equivalent replacements and improvements, etc. shall be included in the protection scope of the present disclosure without departing from the spirit and scope of the present disclosure. At the same time, the appended claims of the present disclosure are intended to cover all changes and modifications falling within the scope and limits or scope and limits of the claims.

Claims

1. A device for measuring temperature of a switchgear (200), the switchgear (200) comprising a busbar compartment (202) and a circuit breaker compartment (203), the device comprising: at least one sensor (101) arranged at a busbar (201) in the busbar compartment (202) and adapted to sense temperature of at least one predetermined location of the busbar (201); a transmission module (102) coupled to the at least one sensor (101) and adapted to transmit data representative of the temperature of the at least one predetermined location; a power module (103) adapted to power the at least one sensor (101) and the transmission module (102), wherein at least one of the transmission module (102) and the power module (103) is detachably arranged at an interface (204) between the circuit breaker compartment (203) and the busbar compartment (202), the device further comprising: a connector (104) detachably arranged at the interface (204) and connected to at least one of the transmission module (102) and the power module (103) without fasteners by at least one of magnetic attraction and plug-in connection, wherein the at least one of the transmission module (102) and the power module (103) is replaceable individually without de-energizing the busbar, and a housing (105) for accommodating the at least one of the transmission module (102) and the power module (103), wherein the housing (105) comprises a first magnetic portion (1051) and the connector (104) comprises a second magnetic portion (1041) adapted to be attracted by the first magnetic portion (1051) for connection to the housing (105), wherein the connector (104) further comprises at least one radial hole (1042) and the housing (105) comprises at least one plug-in portion (1052) adapted to be plugged into the corresponding at least one radial hole (1042) such that the housing (105) is connected to the connector (104).

2. The device according to claim 1, wherein the housing (105) further comprises at least one coupling mechanism (1053) coupled to the corresponding plug-in portion (1052) and adapted to change a plugging depth of the plug-in portion (1052) in the radial hole (1042) in response to the plug-in portion (1052) being pressed.

3. The device according to claim 1, wherein the connector (104) is arranged in a nozzle at least partially surrounding a fixed contact (205) of a circuit breaker in the circuit breaker compartment (203).

4. The device according to claim 3, wherein the power supply module (103) is adapted to draw power from the fixed contact (205) by induction and to supply the power to the transmission module (102) and the at least one sensor (101).

5. The device according to claim 3, wherein the power supply module (103) is adapted to draw power from an electric field formed around the fixed contact (205) and to supply the power to the transmission module (102) and the at least one sensor (101).

6. A switchgear (200) comprising the device according to any one of claims 1 to 5.

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