Electricity consumption monitoring module

Abstract

The utility model discloses a power utilization monitoring module, and relates to the technical field of power utilization equipment. The power utilization monitoring module comprises a shell, a busbar assembly and a coil, the shell is provided with an upper opening and a lower opening, the busbar assembly and the coil are both arranged in a containing cavity of the shell, the coil is connected to the busbar assembly in a sleeving mode, the busbar assembly is provided with a first wiring terminal, and the coil is provided with a second wiring terminal. The first wiring terminal is exposed through the upper opening, the plugging part of the busbar assembly passes through the lower opening and extends out of the accommodating cavity, and the plugging part can be plugged in a wiring port of an air switch. According to the scheme, the problems that the application range of an existing power utilization monitoring module is limited, and the contact effect is poor after installation can be solved.

Description

Technical Field

[0001] The present application belongs to the technical field of electrical equipment, and specifically relates to an electrical consumption monitoring module. Background Art

[0002] The power consumption monitoring module is a device that monitors the operation of air switch circuits. It is mainly used to monitor power safety data such as voltage and current values, temperature values, leakage values, power consumption, etc. in each branch of the power system. When the detection value reaches the alarm threshold, the device can immediately report the alarm signal to the monitoring center platform through the host to monitor, analyze and manage the use of the power system in real time.

[0003] The power monitoring module is usually installed on the upper or lower part of the air switch. When in use, the wire needs to be passed through the power monitoring module (i.e., the coil inside the power monitoring module), and the wire and the metal sheet of the power monitoring module are plugged into the wiring port of the air switch. After the air switch is powered on, the voltage, current, temperature and other data are sampled and monitored through the coil, temperature sensor and other devices inside the power monitoring module. In actual use, when an air switch is connected to multiple loads or multiple air switches share one power monitoring module, the threading hole of the power monitoring module needs to be threaded with two wires at the same time. At this time, the wire cannot be installed because the hole diameter of the threading hole is too small. At this time, the solution that can be easily thought of is to increase the hole diameter of the threading hole. However, since the width of the power monitoring module needs to be less than or equal to the width of the air switch, this limits the diameter of the threading hole, resulting in a relatively limited scope of application of the power monitoring module; in addition, the wire and the metal sheet of the power monitoring module are plugged into the wiring port of the air switch together. Due to the large size of the wiring port, the contact effect is poor and sparking is prone to occur. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide a power consumption monitoring module, which can solve the problem that the application scope of the current power consumption monitoring module is relatively limited and the contact effect is poor after installation.

[0005] In order to solve the above technical problems, this application is implemented as follows:

[0006] An embodiment of the present application provides an electricity consumption monitoring module, including a shell, a bus assembly and a coil, the shell is provided with an upper opening and a lower opening, the bus assembly and the coil are both arranged in a accommodating cavity of the shell, the coil is sleeved on the bus assembly, the bus assembly has a first terminal, the first terminal is exposed through the upper opening, the plug-in portion of the bus assembly extends through the lower opening to the outside of the accommodating cavity, and the plug-in portion can be plugged into the wiring port of the air switch.

[0007] In an embodiment of the present application, the bus assembly of the power monitoring module has a first terminal, which is exposed through the upper opening of the shell. At this time, the wire used to connect the load can be directly plugged into the first terminal without passing through the coil of the power monitoring module. Therefore, the first terminal can be used to plug at least one wire, that is, one air switch can be connected to multiple loads or multiple air switches can share one power monitoring module, thereby expanding the scope of application of the power monitoring module; in addition, the plug-in portion of the bus assembly extends through the lower opening of the shell of the power monitoring module to the outside of the accommodating cavity, so that the plug-in portion can be plugged into the wiring port of the air switch, so that the plug-in portion is adapted to the wiring port, thereby fully contacting the power monitoring module and the air switch, thereby improving the electrical connection performance between the two and avoiding the occurrence of sparks. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 A schematic diagram of the structure of the power consumption monitoring module disclosed in the embodiment of the present application;

[0009] Figure 2 An exploded diagram of the power consumption monitoring module disclosed in the embodiment of the present application;

[0010] Figure 3 A top view of the power consumption monitoring module disclosed in an embodiment of the present application;

[0011] Figure 4 A side view of the power consumption monitoring module disclosed in the embodiment of the present application;

[0012] Figure 5 A cross-sectional view of the power consumption monitoring module disclosed in the embodiment of the present application;

[0013] Figure 6 This is a schematic diagram of the assembly structure of the power consumption monitoring module, wires and air switches disclosed in the embodiment of the present application.

[0014] Description of reference numerals:

[0015] 100 - housing, 110 - upper opening, 120 - lower opening, 130 - through hole, 140 - housing, 141 - avoidance opening, 150 - cover plate, 151 - first part, 152 - second part, 152a - flange part, 153 - third part;

[0016] 200-busbar assembly, 210-first terminal, 220-plug-in portion, 230-copper busbar, 231-first board segment, 232-second board segment, 233-third board segment, 233a-first sub-board segment, 233b-second sub-board segment, 233c-third sub-board segment, 240-temperature detection member, 250-connector;

[0017] 300-coil;

[0018] 400-air switch, 410-wiring port;

[0019] 500-fasteners;

[0020] 600-circuit board;

[0021] 700-wire;

[0022] 810 - first light guide, 820 - second light guide;

[0023] 900-neutral terminal. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0025] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0026] The power consumption monitoring module provided in the embodiment of the present application is described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0027] like Figures 1 to 6As shown, the embodiment of the present application discloses an electricity monitoring module, which includes a housing 100, a bus assembly 200 and a coil 300. The housing 100 is provided with an upper opening 110 and a lower opening 120. The bus assembly 200 and the coil 300 are both arranged in the accommodating cavity of the housing 100. The housing 100 is used to protect the bus assembly 200 and the coil 300. Optionally, the housing 100 can be an insulating structure, for example, a plastic structure, to improve the safety of the electricity monitoring module. The coil 300 is sleeved on the bus assembly 200, and the bus assembly 200 has a first wiring terminal 210, which is exposed through the upper opening 110. The first wiring terminal 210 here can be the same as the wiring port 410 of the air switch 400, and its size is larger to facilitate the plugging of at least one wire 700. The plug-in portion 220 of the busbar assembly 200 extends through the lower opening 120 to the outside of the accommodating cavity of the housing 100 . The plug-in portion 220 can be plugged into the wiring port 410 of the air switch 400 . The plug-in portion 220 and the wiring port 410 of the air switch 400 can be adapted to each other.

[0028] In the embodiment of the present application, the bus assembly 200 of the power monitoring module has a first terminal 210, which is exposed through the upper opening 110 of the housing 100. At this time, the wire 700 used to connect the load can be directly plugged into the first terminal 210 without passing through the coil 300 of the power monitoring module. Therefore, the first terminal 210 can be used to plug at least one wire 700, that is, one air switch 400 can be connected to multiple loads or multiple air switches 400 can share one power monitoring module, thereby expanding the scope of application of the power monitoring module; in addition, the plug-in portion 220 of the bus assembly 200 passes through the lower opening 120 of the housing 100 of the power monitoring module and extends outside the accommodating cavity of the housing 100, so that the plug-in portion 220 can be plugged into the wiring port 410 of the air switch 400, so that the plug-in portion 220 is adapted to the wiring port 410, so that the power monitoring module is fully in contact with the air switch 400, thereby improving the electrical connection performance between the two and avoiding the occurrence of sparking. Therefore, the embodiments of the present application can solve the problem that the application scope of the current power consumption monitoring module is relatively limited and the contact effect is poor after installation.

[0029] In an optional embodiment, the busbar assembly 200 includes a copper busbar 230, a temperature detection member 240 and a first terminal 210. The first terminal 210 is electrically connected to the first end of the copper busbar 230. The second end of the copper busbar 230 is provided with a plug-in portion 220. When the plug-in portion 220 is plugged into the wiring port 410 of the air switch 400, the current flows sequentially from the air switch 400, the copper busbar 230, the first terminal 210 and the wire 700. The temperature detection member 240 is provided on the copper busbar 230, that is, the temperature detection member 240 is used to detect the temperature of the copper busbar 230. When the temperature detection member 240 detects that the temperature of the copper busbar 230 is too high, that is, greater than or equal to the preset temperature, the power consumption monitoring module can issue an alarm, and the air switch 400 is closed at this time to stop the power supply and prevent the load from being burned. The coil 300 is sleeved on the copper bar 230, that is, the coil 300 is used to detect the current and voltage in the copper bar 230. When at least one of the current and voltage in the copper bar 230 is greater than or equal to the preset value, the power monitoring module can issue an alarm, and the air switch 400 is closed at this time to stop the power supply to avoid damage to the load. The copper bar 230 is used in this solution, which has the characteristics of low resistivity, which is conducive to improving the transmission efficiency of the current, thereby improving the detection accuracy of the coil 300 and the temperature detection member 240. Of course, the copper bar 230 can also be replaced by a copper-aluminum alloy structure.

[0030] Optionally, the copper bus 230 can be a flat structure; or, in other embodiments, the copper bus 230 includes a first plate segment 231 and a second plate segment 232 connected to each other, and the first plate segment 231 is bent relative to the second plate segment 232, that is, the copper bus 230 can be an L-shaped structure, the first plate segment 231 is provided with a plug-in portion 220, the temperature detection component 240 is arranged on the second plate segment 232, the coil 300 is sleeved on the second plate segment 232, and the second plate segment 232 is parallel to the bottom surface of the accommodating cavity. At this time, the height of the L-shaped copper bus 230 is relatively small, and the space it occupies in the accommodating cavity of the housing 100 is relatively small, which is conducive to the miniaturization of the electricity consumption monitoring module.

[0031] In a further optional implementation, the copper busbar 230 also includes a third board segment 233 connected to the second board segment 232, the third board segment 233 is bent relative to the second board segment 232, and the first board segment 231 and the third board segment 233 are respectively located on the opposite sides of the second board segment 232, that is, in the thickness direction of the second board segment 232, the third board segment 233, the second board segment 232 and the first board segment 231 are arranged in sequence, so that the size of the electrical monitoring module in the length direction of the second board segment 232 remains basically unchanged. The first wiring terminal 210 is sleeved on the third board segment 233, and the connection area between the first wiring terminal 210 and the copper busbar 230 is large, which is conducive to the stable transmission of current. Of course, the first board segment 231, the second board segment 232 and the third board segment 233 can also be arranged in sequence along the length direction of the second board segment 232.

[0032] In an optional embodiment, the third plate segment 233 may be a flat plate structure; or the third plate segment 233 may be a bent structure, the third plate segment 233 includes a first sub-plate segment 233a, a second sub-plate segment 233b and a third sub-plate segment 233c which are connected in sequence, the first sub-plate segment 233a is connected to the second plate segment 232, the first sub-plate segment 233a and the third sub-plate segment 233c are bent relative to the second sub-plate segment 233b, the first sub-plate segment 233a and the third sub-plate segment 233c are respectively located on opposite sides of the second sub-plate segment 233b, that is, in the thickness direction of the second sub-plate segment 233b, the first sub-plate segment 233a and the third sub-plate segment 233c extend in opposite directions respectively. The second sub-plate segment 233b is arranged opposite to the second plate segment 232, the first terminal 210 is sleeved on the third sub-plate segment 233c, and at least part of the first terminal 210 is located above the second sub-plate segment 233b. This solution adopts the third plate section 233 of this structure, which can accommodate at least part of the first terminal 210 to reduce the size of the power monitoring module in the length direction of the second plate section 232, thereby making the power monitoring module more miniaturized.

[0033] In another optional embodiment, the housing 100 is provided with a through hole 130, and the power consumption monitoring module further includes a fastener 500. Optionally, the fastener 500 may be a screw, or of course other types of fasteners 500, which are not specifically limited here. The first terminal 210 is sleeved on the first end of the copper bus 230, and one end of the fastener 500 passes through the through hole 130 and is connected to the first terminal 210, that is, the first terminal 210 and the housing 100 are connected by the fastener 500, thereby improving the stability of the first terminal 210. Of course, the first terminal 210 and the housing 100 can also be connected by welding or the like.

[0034] In a further optional embodiment, the housing 100 includes a detachably connected shell 140 and a cover 150, the cover 150 covers the shell 140 to enclose a receiving cavity, and optionally, the cover 150 may be a flat plate structure; or, the cover 150 includes a first portion 151, a second portion 152, and a third portion 153 connected in sequence, the first portion 151 and the third portion 153 are both bent relative to the second portion 152, and the first portion 151 and the third portion 153 are respectively located on opposite sides of the second portion 152, that is, in the thickness direction of the second portion 152, the first portion 151 and the third portion 153 are respectively located on opposite sides of the second portion 152, that is, in the thickness direction of the second portion 152, the first portion 151 and the third portion 153 are respectively located on opposite sides of the second portion 152, that is, in the thickness direction of the second portion 152, the first portion 151 and the third portion 153 are respectively located on opposite sides of the second portion 152, and ... and the first portion 151 and the third portion 153 are respectively located on opposite sides of the second portion 152, and the first portion 151 and the third portion 153 are respectively located on opposite sides of the second portion 152, and the first portion 151 and the third portion 153 are respectively located on opposite sides of the second portion 152, and the first portion 151 and 153 extend in opposite directions respectively, the first part 151 is provided with an upper opening 110, at this time, the plug-in opening of the first terminal 210 extends along the thickness direction of the first part 151, that is, the wire 700 is plugged along the thickness direction of the first part 151; the second part 152 is provided with a through hole 130, that is, one end of the fastener 500 passes through the through hole 130 along a direction perpendicular to the thickness direction of the first part 151 and is connected to the first terminal 210. In this case, the size of the first terminal 210 can be reduced, and at the same time, the compactness of the structure in the accommodating cavity can be improved, and the use of the electrical monitoring module is more miniaturized.

[0035] Optionally, a lower opening 120 is formed at the bottom of the housing 140 , so that the plug-in portion 220 can pass through the lower opening 120 and be plugged into the wiring port 410 of the air switch 400 .

[0036] Optionally, the second part 152 may be provided with a flange portion 152a, which is located outside the accommodating cavity, and the through hole 130 is opened in the flange portion 152a. In this case, the flange portion 152a can be used as a reinforcing rib to enhance the structural strength of the cover plate 150. At the same time, the setting of the flange portion 152a can extend the length of the through hole 130, thereby increasing the contact area between the fastener 500 and the housing 100, thereby avoiding damage to the second part 152 due to concentrated stress during the process of tightening the fastener 500.

[0037] Optionally, the cover plate 150 and the housing 140 may be detachably connected by means of snap connection, bolt connection, etc., to facilitate assembly and disassembly.

[0038] Optionally, the power consumption monitoring module further includes a neutral terminal 900 , the shell 140 is provided with an avoidance opening 141 , the neutral terminal 900 is electrically connected to the bus assembly 200 , the neutral terminal 900 faces the avoidance opening 141 and is exposed through the avoidance opening 141 to facilitate neutral wire plugging.

[0039] In an optional embodiment, the power consumption monitoring module further includes a circuit board 600, a second terminal and a third terminal. The circuit board 600 is disposed in the accommodating cavity, the temperature detection member 240 is electrically connected to the circuit board 600 through the second terminal, and the coil 300 is electrically connected to the circuit board 600 through the third terminal. This solution is centrally controlled through the circuit board 600, which is conducive to improving the monitoring accuracy of the power consumption monitoring module; in addition, the temperature detection member 240 and the coil 300 are electrically connected to the circuit board 600 through the second terminal and the third terminal respectively, which facilitates the disassembly and assembly of the temperature detection member 240 and the coil 300 while ensuring stable connection.

[0040] In a further optional embodiment, the busbar assembly 200 also includes a connector 250. Optionally, the connector 250 can be a screw, or other types of connectors 250 such as bolts, which are not specifically limited here. The temperature detection member 240 includes a metal shell and a temperature sensor. The metal shell wraps the temperature sensor, which is not only conducive to protecting the temperature sensor, but also convenient for setting the temperature sensor; the metal shell is connected to the copper bus 230 through the connector 250, and the metal shell contacts the copper bus 230. At this time, the contact area between the two is large, which is conducive to improving the detection reliability and accuracy of the temperature detection member 240; the temperature sensor is electrically connected to the circuit board 600 through the second terminal to transmit the temperature signal detected by the temperature sensor to the circuit board 600, and the circuit board 600 can make corresponding instructions according to the temperature signal. Of course, the metal shell can also be not provided, and the temperature sensor directly contacts the copper bus 230 to detect the temperature of the copper bus 230.

[0041] Optionally, the metal shell can be a copper structure, which has good thermal conductivity and is conducive to improving the detection reliability and accuracy of the temperature detection element 240. Of course, the metal shell can also be other metal structures such as brass, and the embodiment of the present application does not make specific restrictions on this.

[0042] Optionally, the metal housing and the temperature sensor are an integrated structure, in which case the two can be in full contact, which is conducive to improving the detection accuracy of the temperature sensor and facilitating the disassembly and assembly of the temperature detection member 240. Of course, the metal housing and the temperature sensor can also be a split structure. Further optionally, the metal housing and the temperature sensor can be formed into an integrated structure by means of glue filling, so that the metal housing and the temperature sensor are in full contact, so as to improve the thermal conductivity of the metal housing, thereby improving the detection accuracy of the temperature sensor.

[0043] Optionally, the electricity usage monitoring module also includes a first light guide 810, which is disposed in a first mounting hole of the housing 100 and is exposed. The first light guide 810 is disposed close to the circuit board 600. The first light guide 810 can serve as a status indicator light. When the electricity usage monitoring module is in working condition, light emitted from the circuit board 600 shines on the first light guide 810. The user can know the working status of the electricity usage monitoring module by observing the first light guide 810.

[0044] Optionally, the electricity usage monitoring module also includes a second light guide 820, which is disposed in a second mounting hole of the housing 100 and is exposed. The second light guide 820 is disposed close to the circuit board 600. The second light guide 820 can be used as a fault light. When a fault occurs in the electricity usage monitoring module, light emitted from the circuit board 600 shines on the second light guide 820. The user can know whether a fault occurs in the electricity usage monitoring module by observing the second light guide 820.

[0045] Optionally, the light emitted by the first light guide 810 and the second light guide 820 may be the same or different. When the light emitted by the first light guide 810 and the second light guide 820 are different, the light emitted by one may be red light and the light emitted by the other may be green light, or of course, light of other colors. The embodiment of the present application does not impose any specific limitation on this.

[0046] In another optional embodiment, the number of busbar assemblies 200 may be one; or, the number of busbar assemblies 200 is at least two, and each busbar assembly 200 is sequentially arranged at intervals along the width direction of the housing 100, and the upper opening 110, the lower opening 120 and the coil 300 are arranged one-to-one with the busbar assembly 200. By providing multiple busbar assemblies 200, it is convenient to connect more loads, thereby further expanding the scope of application of the power consumption monitoring module.

[0047] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A power consumption monitoring module, characterized in that: The invention comprises a housing (100), a busbar assembly (200) and a coil (300), wherein the housing (100) is provided with an upper opening (110) and a lower opening (120), the busbar assembly (200) and the coil (300) are both arranged in a receiving cavity of the housing (100), the coil (300) is sleeved on the busbar assembly (200), the busbar assembly (200) has a first wiring terminal (210), the first wiring terminal (210) is exposed through the upper opening (110), a plug-in portion (220) of the busbar assembly (200) passes through the lower opening (120) and extends outside the receiving cavity, and the plug-in portion (220) can be plugged into a wiring port (410) of an air switch (400).

2. The power consumption monitoring module according to claim 1, characterized in that: The busbar assembly (200) comprises a copper busbar (230), a temperature detection component (240) and the first wiring terminal (210); the first wiring terminal (210) is electrically connected to a first end of the copper busbar (230); a second end of the copper busbar (230) is provided with the plug-in portion (220); the temperature detection component (240) is arranged on the copper busbar (230); and the coil (300) is sleeved on the copper busbar (230).

3. The power consumption monitoring module according to claim 2, characterized in that: The copper busbar (230) comprises a first plate section (231), a second plate section (232) and a third plate section (233) which are connected in sequence; the first plate section (231) and the third plate section (233) are both bent relative to the second plate section (232); the first plate section (231) and the third plate section (233) are respectively located on two opposite sides of the second plate section (232); the first plate section (231) is provided with the plug-in portion (220); the temperature detection component (240) is arranged on the second plate section (232); the coil (300) is sleeved on the second plate section (232); the second plate section (232) is parallel to the bottom surface of the accommodating cavity; and the first wiring terminal (210) is sleeved on the third plate section (233).

4. The power consumption monitoring module according to claim 3, characterized in that: The third plate segment (233) is a bent structure, and the third plate segment (233) comprises a first sub-plate segment (233a), a second sub-plate segment (233b) and a third sub-plate segment (233c) which are connected in sequence, the first sub-plate segment (233a) is connected to the second plate segment (232), the first sub-plate segment (233a) and the third sub-plate segment (233c) are both bent relative to the second sub-plate segment (233b), the first sub-plate segment (233a) and the third sub-plate segment (233c) are respectively located on two opposite sides of the second sub-plate segment (233b), the second sub-plate segment (233b) and the second plate segment (232) are arranged opposite to each other, the first wiring terminal (210) is sleeved on the third sub-plate segment (233c), and at least part of the first wiring terminal (210) is located above the second sub-plate segment (233b).

5. The power consumption monitoring module according to claim 2, characterized in that: The housing (100) is provided with a through hole (130), the power consumption monitoring module further comprises a fastener (500), the first wiring terminal (210) is sleeved on the first end of the copper busbar (230), and one end of the fastener (500) passes through the through hole (130) and is connected to the first wiring terminal (210).

6. The power consumption monitoring module according to claim 5, characterized in that: The housing (100) comprises a shell (140) and a cover plate (150) which are detachably connected, the cover plate (150) covering the shell (140) to enclose the accommodating cavity, the cover plate (150) comprising a first part (151), a second part (152) and a third part (153) which are connected in sequence, the first part (151) and the third part (153) are both bent relative to the second part (152), the first part (151) and the third part (153) are respectively located on two opposite sides of the second part (152), the first part (151) is provided with the upper opening (110), and the second part (152) is provided with the through hole (130).

7. The power consumption monitoring module according to claim 2, characterized in that: The power consumption monitoring module further comprises a circuit board (600), a second wiring terminal and a third wiring terminal; the circuit board (600) is arranged in the accommodating cavity; the temperature detection element (240) is electrically connected to the circuit board (600) via the second wiring terminal; and the coil (300) is electrically connected to the circuit board (600) via the third wiring terminal.

8. The power consumption monitoring module according to claim 7, characterized in that: The busbar assembly (200) further comprises a connector (250), the temperature detection component (240) comprises a metal shell and a temperature sensor, the metal shell is connected to the copper busbar (230) via the connector (250), the metal shell is in contact with the copper busbar (230), the metal shell wraps the temperature sensor, and the temperature sensor is electrically connected to the circuit board (600) via the second terminal.

9. The power consumption monitoring module according to claim 8, characterized in that: The metal shell is a copper structure; The metal shell and the temperature sensor are an integrated structure.

10. The power consumption monitoring module according to claim 1, characterized in that: The number of the busbar assemblies (200) is at least two, and the busbar assemblies (200) are arranged in sequence and spaced apart along the width direction of the housing (100), and the upper opening (110), the lower opening (120) and the coil (300) are all arranged in one-to-one correspondence with the busbar assemblies (200).

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