Current performance testing device of electric power grid

Abstract

The invention belongs to the technical field of electric power testing, and particularly relates to a current performance testing device of an electric power grid, which comprises a testing box composed of a main box body and a box cover, the inner side of the main box body is fixedly provided with a testing equipment frame, and the surface of the testing equipment frame is provided with a heat dissipation port; the heat dissipation mechanism is mounted at the end part of the test box and comprises an air inlet box and an exhaust box, an air filter element is arranged in the air inlet box, and an exhaust fan is arranged in the exhaust box; the problems to be solved in the scheme are insufficient in maintenance and test flexibility, insufficient in heat dissipation performance and poor in wiring stability. According to the solution, the insulation rotating column of the connecting mechanism rotates to drive the wire holder and the testing seat to rotate, the wire of the power system skips over the testing device for connection and use through the wire holder, the wire of the power system is connected with testing equipment in the testing equipment frame for use through the testing seat, adjustment is convenient and rapid during use, and the testing efficiency is improved. And the test device is prevented from influencing the operation of the power system.

Description

Technical Field

[0001] The present invention belongs to the technical field of power testing, and particularly relates to a current performance testing device for a power grid. Background Art

[0002] In the power system, the current performance testing device is an important equipment to ensure the safe and stable operation of the power grid. It is mainly used to monitor key parameters such as current, voltage, and power in real time, so as to detect abnormal conditions such as overload, short circuit, and harmonics in a timely manner. However, the traditional current testing device has many limitations in practical applications, which are mainly manifested in the following aspects: 1. Insufficient flexibility in maintenance and testing Due to the hard connection between the testing device and the power system, power-off operation is required during maintenance, calibration, or replacement, which affects the continuity of power supply and is difficult to meet the requirements of modern power systems for high reliability and uninterrupted operation; 2. Insufficient heat dissipation performance, affecting long-term stability When the current testing device operates at a high load for a long time, a large amount of heat will be generated. If the heat dissipation design is not good, it may cause the device to overheat, the measurement accuracy to decrease, and even accelerate the aging of components and shorten the service life; 3. Poor wiring stability, prone to poor contact The wiring method of the traditional device often relies on bolt fixation or simple plug-in connection, which is easy to loosen under environments such as vibration and temperature change, resulting in an increase in contact resistance, affecting the accuracy of test data, and even causing local overheating; Therefore, it is necessary to design a current performance testing device for a power grid to solve the above problems. Summary of the Invention

[0003] The purpose of the present invention is to provide a current performance testing device for a power grid to solve the problems raised in the above background art.

[0004] To achieve the above purpose, the present invention provides the following technical solution: A current performance testing device for a power grid, comprising: A test box, which is composed of a main box body and a box cover. A test equipment rack is fixedly installed inside the main box body, and heat dissipation vents are provided on the surface of the test equipment rack; A heat dissipation mechanism, which is installed at the end of the test box and includes an air intake box and an exhaust box. An air filter is provided inside the air intake box, and an exhaust fan is provided inside the exhaust box; A wiring mechanism, which is installed at the upper end inside the main box body and includes a box body shell, a reinforcing inner ring, an elastic cloth cover, and an elastic shrinkage band for strengthening the wire connection of the power system; The connecting mechanism is fixed to the upper end inside the main box through the installation mechanism, and includes an insulating housing, a connecting seat, an insulating rotating column, a wiring seat and a testing seat. The insulating rotating column is driven to rotate by an adjusting box to switch the connection state between the wiring seat or the testing seat and the connecting seat; The air guide plate is fixed inside the main box to guide the air flow to be discharged from the heat dissipation mechanism.

[0005] Preferably, the adjusting box includes: An adjusting motor, the output shaft of which is connected to an adjusting worm; An adjusting rotating shaft, one end of which is provided with an adjusting turbine meshing with the adjusting worm, and the other end is provided with an adjusting gear; An adjusting gear ring is fixed on the outer side of the insulating rotating column and meshes with the adjusting gear to drive the insulating rotating column to rotate.

[0006] Preferably, connecting ejector rods are provided at the ends of the wiring seat and the testing seat, and insulating elastic pieces are coated on the outside. A connecting rod is arranged inside the testing seat, and the connecting rod is connected to the testing equipment inside the testing equipment rack. One end of the insulating elastic piece is supported on the testing seat or the wiring seat to ensure the stability of electrical contact.

[0007] Preferably, a connecting pressing piece is provided at the end of the insulating housing for fixing the wires of the power system, and one end of the connecting pressing piece is connected to the connecting seat.

[0008] Preferably, a spiral elastic piece is provided on the inner wall of the reinforcing inner ring, and one end is fixed to the outside of the elastic contraction band to enhance the tightening force on the wires.

[0009] Preferably, a winding box is provided at the lower end of the box body shell, and a winding column driven by a winding motor is installed inside. Guide pieces are arranged on the surface of the winding column, and the winding column controls the tightness of the elastic contraction band through a contraction pull rope.

[0010] Preferably, one end of the contraction pull rope is fixed to the inside of the elastic contraction band, and the other end is wound around the guide post and the guide tube and then connected to the winding column to ensure the stability of the winding direction of the pull rope.

[0011] Preferably, an air inlet is provided on the upper side of the air inlet box, an air extraction port and an air outlet are respectively provided on the upper and lower sides of the exhaust box, and the air extraction port is aligned with the position of the testing equipment rack for efficient heat dissipation.

[0012] Preferably, the installation mechanism includes an installation seat and a fixing seat, which are fixed by the cooperation of a clamping groove and a clamping plate. A limiting block is provided at one end of the fixing seat, and a ventilation hole is provided inside the fixing seat for assisting heat dissipation.

[0013] Compared with the prior art, the beneficial effects of the present invention are: 1. Intelligent and fast switching to ensure uninterrupted operation of the power grid: Through the innovative connection mechanism design, a high-precision worm gear transmission system is used to drive the insulating rotating column to achieve seamless switching between the terminal block and the test block. The switching time is shortened, supporting the power system to complete the connection and exit of the test device without power outage, greatly reducing downtime and improving power supply continuity.

[0014] 2. Multi-level dynamic reinforcement ensures stable and reliable wiring: The wiring mechanism integrates spiral springs and motor-driven elastic shrink belts. The retracted pull rope is controlled by the winding motor to form a progressive tightening force. Combined with silicone rubber composite insulating springs, it can effectively resist vibration and temperature changes.

[0015] 3. Efficient directional heat dissipation to extend the service life of the equipment: The heat dissipation mechanism adopts laminar air guide plates with a dual-channel forced air cooling system, the air intake box is equipped with a composite filter module, and the exhaust fan directionally extracts heat from the test equipment rack area. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the internal structure of the test box of the present invention; Figure 3 It is a schematic diagram of the box shell structure of the present invention; Figure 4 It is a schematic diagram of the winding box structure of the present invention; Figure 5 It is a schematic diagram of the structure of the elastic shrinkable belt of the present invention; Figure 6 It is a schematic diagram of the connection mechanism structure of the present invention; Figure 7 For the present invention Figure 6 The enlarged structural diagram at A in the middle; Figure 8 It is a schematic diagram of the test socket structure of the present invention; Figure 9 It is a schematic diagram of the structure of the insulating rotating column of the present invention; Figure 10 It is a schematic diagram of the air intake box structure of the present invention; Figure 11 It is a schematic diagram of the exhaust box structure of the present invention; Figure 12 It is a schematic diagram of the structure of the test equipment rack of the present invention; Figure 13 It is a schematic diagram of the installation structure of the present invention; In the figure: 1. Test box; 11. Main box body; 12. Box cover; 13. Test equipment rack; 14. Heat dissipation vent; 2. Heat dissipation mechanism; 20. Air guide plate; 21. Air inlet box; 211. Air filter element; 212. Air inlet; 22. Exhaust box; 221. Air extraction port; 222. Exhaust fan; 223. Air outlet; 3. Wiring mechanism; 31. Box body shell; 32. Reinforcing inner ring; 33. Spiral spring piece; 34. Elastic cloth cover; 35. Elastic contraction band; 36. Contraction pull rope; 37. Reel box; 371. Reel motor; 372. Reel column; 373. Guide piece; 38. Guide post; 39. Guide tube; 4. Connection mechanism; 41. Insulating shell; 42. Connection pressing piece; 43. Connection seat; 44. Insulating rotating column; 45. Wiring seat; 46. Test seat; 47. Adjustment box; 471. Adjustment motor; 472. Adjustment worm; 473. Adjustment turbine; 474. Adjustment rotating shaft; 475. Adjustment gear; 476. Adjustment gear ring; 48. Connecting rod; 481. Connecting ejector rod; 482. Insulating spring piece; 5. Installation mechanism; 51. Installation seat; 52. Fixed seat; 53. Engaging groove; 54. Engaging plate; 55. Limiting block; 56. Vent hole. Specific embodiments

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0018] Embodiment 1: Please refer to Figures 1 to 13 , the present invention provides a technical solution: a current performance test device for a power grid, including a test box 1. The test box 1 includes a main box body 11 and a box cover 12 installed on the main box body 11. A test equipment rack 13 is fixedly installed inside the main box body 11. A heat dissipation vent 14 is provided on the surface of the test equipment rack 13. A heat dissipation mechanism 2 is provided at the end of the test box 1. A wiring mechanism 3 and a connection mechanism 4 are installed at the upper end inside the main box body 11. The connection mechanism 4 is installed inside the main box body 11 through an installation mechanism 5; The connecting mechanism 4 includes an insulating housing 41 fixedly installed at the upper end inside the main housing 11. A connecting seat 43 is fixedly installed inside the insulating housing 41. An insulating rotating column 44 is rotatably installed in the middle inside the insulating housing 41. On both sides of the insulating rotating column 44, there are a wiring seat 45 and a test seat 46, and the positions of the wiring seat 45 and the test seat 46 correspond to the position of the connecting seat 43. Inside the test seat 46, there is a connecting rod 48, and the connecting rod 48 is connected to the test equipment inside the test equipment rack 13. At both ends of the insulating rotating column 44, there are adjustment boxes 47. At the lower end inside the adjustment box 47, an adjustment motor 471 is fixedly installed. The output shaft of the adjustment motor 471 is fixedly installed with an adjustment worm 472. At the upper end of the adjustment box 47, an adjustment rotating shaft 474 is rotatably installed. At one end of the adjustment rotating shaft 474 corresponding to the position of the adjustment worm 472, an adjustment turbine 473 is fixedly installed. The adjustment turbine 473 is engaged on the adjustment worm 472. At the other end of the adjustment rotating shaft 474, an adjustment gear 475 is fixedly installed. An adjustment tooth ring 476 is fixedly installed on the outside of the insulating rotating column 44. The adjustment tooth ring 476 is engaged on the adjustment gear 475 through teeth. The transmission ratio of the adjustment worm 472 to the adjustment turbine 473 is 1:15, and the tooth number ratio of the adjustment gear 475 to the adjustment tooth ring 476 is 1:3, forming a high-precision angle control system. The adjustment motor 471 drives the adjustment worm 472 to rotate, the adjustment worm 472 drives the adjustment turbine 473 and the adjustment rotating shaft 474 to rotate, the adjustment rotating shaft 474 drives the adjustment gear 475 to rotate, the adjustment gear 475 drives the adjustment tooth ring 476 and the insulating rotating column 44 to rotate, the insulating rotating column 44 drives the wiring seat 45 and the test seat 46 to rotate, the wiring seat 45 moves out from between the connecting seats 43, and the test seat 46 moves into between the connecting seats 43. At the ends of both the wiring seat 45 and the connecting rod 48, there are connecting ejector rods 481. On the outside of the connecting ejector rod 481, there is an insulating elastic sheet 482. One end of the insulating elastic sheet 482 is supported on the test seat 46 and the wiring seat 45. The contact pressure between the connecting ejector rod 481 and the insulating elastic sheet 482 is 5N. The material of the insulating elastic sheet 482 is a composite material of silicone rubber and carbon nanotubes, and the elastic modulus is 7MPa. When in use, it is convenient to press on the connecting seat 43 through the elastic force of the insulating elastic sheet 482 and the connecting ejector rod 481. At the end of the insulating housing 41, there is a connecting pressing piece 42. One end of the connecting pressing piece 42 is connected to one end of the connecting seat 43. When in use, it is convenient to connect the wires of the power system through the connecting pressing piece 42; The mounting mechanism 5 includes a mounting base 51 installed on one side of the insulating housing 41 and a fixing base 52 installed on one side of the mounting base 51. A clamping groove 53 is provided on one side of the mounting base 51, a clamping plate 54 is provided on one side of the fixing base 52, a limiting block 55 is provided at one end of the fixing base 52, and a ventilation hole 56 is formed inside the fixing base 52. When installing and using the insulating housing 41, it is installed by clamping the clamping groove 53 on the clamping plate 54, and the installation is completed by supporting and limiting with the limiting block 55. It is more convenient and fast during installation and use, and ventilation and heat dissipation are facilitated through the ventilation hole 56.

[0019] As can be seen from the above description, the present invention has the following beneficial effects: during use, the insulating rotating column 44 of the connecting mechanism 4 rotates to drive the wiring seat 45 and the test seat 46 to rotate. The wire of the power system is connected and used by skipping the test device through the wiring seat 45, and the wire of the power system is connected to the test equipment in the test equipment rack 13 through the test seat 46. It is convenient and fast to adjust during use, and the influence of the test device on the operation of the power system itself is avoided.

[0020] Embodiment 2: Please refer to Figures 1 to 13As shown in the figure, based on the first embodiment, the present invention provides a technical solution: The wiring mechanism 3 includes a box body housing 31 fixed on the inner wall of the test box 1. A perforation is provided on the outer surface of the main box body 11 corresponding to the position of the box body housing 31. A reinforcing inner ring 32 is provided inside the box body housing 31, and the position of the reinforcing inner ring 32 corresponds to the position of the perforation. An elastic cloth cover 34 is provided inside the reinforcing inner ring 32, and an elastic shrinkage band 35 is provided inside the elastic cloth cover 34. The wires of the power system are connected to the connection pressing piece 42 through the perforation, and are conveniently and stably installed on the wires through the elastic cloth cover 34 and the elastic shrinkage band 35. A spiral spring piece 33 is fixedly installed on the inner wall of the reinforcing inner ring 32. One end of the spiral spring piece 33 is fixed on the outer side of the elastic shrinkage band 35, and the spiral spring piece 33 has an involute spiral structure with a spiral angle of 30° and a spiral pitch of 6 mm, forming a progressive tightening force distribution with the elastic shrinkage band 35, which is convenient for the elastic shrinkage band 35 to be pre-pressed on the wire during use. A winding box 37 is fixedly installed at the lower end of the box body housing 31. A winding motor 371 is fixedly installed at the lower inner side of the winding box 37. A winding column 372 is fixedly installed on the output shaft of the winding motor 371. A contraction pull rope 36 is provided on the outer side of the winding column 372. One end of the contraction pull rope 36 is installed on the inner side of the elastic shrinkage band 35. The winding motor 371 drives the winding column 372 to rotate and cooperate with the guiding piece 373 to wind the contraction pull rope 36. The groove depth between the guiding pieces 373 is 3 mm and the pitch is 10 mm, forming a self-aligning winding system with the contraction pull rope 36. The contraction pull rope 36 pulls the contraction elastic shrinkage band 35. A guiding column 38 is installed inside the box body housing 31, and the contraction pull rope 36 is located between the guiding columns 38. During use, the contraction pull rope 36 moves more stably through the guiding of the guiding column 38. Guide pieces 373 are provided on the surface of the winding column 372. A guiding tube 39 is provided on one side of the elastic shrinkage band 35. One end of the contraction pull rope 36 passes through the guiding tube 39 and is installed on the inner side of the elastic shrinkage band 35. During use, the contraction pull rope 36 conveniently moves and tightens the elastic shrinkage band 35 through the guiding tube 39, so that the elastic shrinkage band 35 is more stable when buckling on the wire.

[0021] For the wiring mechanism 3 adopting the above technical solution, when in use, the wires of the power system are inserted into the inside of the test box 1 and connected to the connection mechanism 4 during installation. The wires can be reinforced through the wiring mechanism 3, thereby ensuring that the wires are more stable during installation and use.

[0022] Further, it can be referred to Figures 1 to 13, the heat dissipation mechanism 2 includes an air intake box 21 installed at the inner top of the test chamber 1 and an exhaust box 22 installed at the inner bottom of the test chamber 1. An air filter element 211 is arranged inside the air intake box 21, and an exhaust fan 222 is arranged inside the exhaust box 22. During the test, the exhaust fan 222 operates to make the air flow through the main box body 11, thereby taking out the heat for dissipation. The air is filtered by the air filter element 211 to reduce the entry of dust into the main box body 11; an air inlet 212 is arranged on the upper side of the air intake box 21, and the air inlet 212 is fixed at the upper end of the main box body 11. The air filter element 211 passes through the air intake box 21 and is communicated with the inside of the main box body 11. The air filter element 211 is a multi-layer composite structure, including an activated carbon layer, a HEPA filter layer and an electrostatic adsorption layer, and the filtration efficiency is over 99.97%. Exhaust ports 221 and air outlets 223 are respectively arranged on the upper and lower sides of the exhaust box 22. The position of the exhaust port 221 corresponds to the position of the test equipment rack 13, and the air outlet 223 is fixedly installed at the lower end of the main box body 11, which is convenient for installing and using the air intake box 21 and the exhaust box 22 during use. A guide air plate 20 is fixedly installed inside the main box body 11, and the lower end of the guide air plate 20 corresponds to the position of the exhaust box 22. The guide air plate 20 is communicated with the heat dissipation mechanism 2. During use, the guide air plate 20 guides the air to facilitate rapid ventilation and heat dissipation. Moreover, the guide air plate 20 is in a curved surface diversion structure, and its radius of curvature is 150 mm, which cooperates with the heat dissipation mechanism 2 to form a laminar flow heat dissipation air flow, and the air flow speed is increased by 35%.

[0023] For the heat dissipation mechanism 2 adopting the above technical solution, during use, the air intake box 21 and the exhaust box 22 of the heat dissipation mechanism 2 are used to ventilate and exhaust air into the test chamber 1, and when the air flows through the test chamber 1, the heat on the test equipment rack 13 and the connecting mechanism 4 can be taken out for heat dissipation, thereby ensuring that the heat generated by the test device is quickly discharged for heat dissipation during use.

[0024] Working principle and usage process of the present invention: When in use, the main box body 11 is installed at the usage position. The wire of the power system passes through the wiring mechanism 3 and is connected to the connecting pressing piece 42. When installing the wire, it passes through the inside of the elastic contraction belt 35. The elastic contraction belt 35 is pressed against the wire by the elastic force of the spiral elastic piece 33. At the same time, the winding motor 371 drives the winding column 372 to rotate and cooperates with the guiding piece 373 to wind the contraction pulling rope 36. The contraction pulling rope 36 pulls the contraction elastic contraction belt 35, so that the elastic contraction belt 35 is tightened and fixed on the wire. When the device does not need to test the current, only the wiring seat 45 is located between the connecting seats 43 to keep the current flowing normally. When the current performance test needs to be carried out, the adjusting motor 471 drives the adjusting worm 472 to rotate. The adjusting worm 472 drives the adjusting turbine 473 and the adjusting rotating shaft 474 to rotate. The adjusting rotating shaft 474 drives the adjusting gear 475 to rotate. The adjusting gear 475 drives the adjusting gear ring 476 and the insulating rotating column 44 to rotate. The insulating rotating column 44 drives the wiring seat 45 and the test seat 46 to rotate. The wiring seat 45 moves out from between the connecting seats 43, and the test seat 46 moves into between the connecting seats 43. The test seat 46 is connected to the test equipment in the test equipment rack 13 through the connecting ejector rod 481 and the connecting rod 48 inside and the wire. It mainly includes an ammeter, a power analyzer, an oscilloscope, etc. When in use, the temperature can be detected by a temperature sensor inside. When testing, the exhaust fan 222 operates to make the air flow through the main box body 11, so as to take out the heat for heat dissipation. After the test is completed, the adjusting worm 472 driven by the adjusting motor 471 rotates in the reverse direction, so as to drive the wiring seat 45 and the test seat 46 to rotate in the reverse direction, so that the wiring seat 45 moves to between the connecting seats 43 again to disconnect the test device and connect the wires of the power system to each other.

[0025] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0026] The above is only used to illustrate the technical solution of the present invention and not to limit it. Other modifications or equivalent replacements made by those of ordinary skill in the art to the technical solution of the present invention, as long as they do not depart from the spirit and scope of the technical solution of the present invention, shall be covered by the scope of the claims of the present invention.

Claims

1. A current performance testing device for an electric power grid, characterized in that, Comprising: A test chamber (1), composed of a main chamber body (11) and a chamber lid (12). Inside the main chamber body (11), a test equipment rack (13) is fixedly installed, and heat dissipation vents (14) are provided on the surface of the test equipment rack (13); A heat dissipation mechanism (2), installed at the end of the test chamber (1), including an air intake chamber (21) and an exhaust chamber (22). An air filter element (211) is provided inside the air intake chamber (21), and an exhaust fan (222) is provided inside the exhaust chamber (22); A wiring mechanism (3), installed at the upper end inside the main chamber body (11), including a box body shell (31), a reinforcing inner ring (32), an elastic cloth cover (34), and an elastic contraction band (35), for strengthening the wire connection of the power system; A connection mechanism (4), fixed to the upper end inside the main chamber body (11) through a mounting mechanism (5), including an insulating shell (41), a connection seat (43), an insulating rotating column (44), a wiring seat (45), and a test seat (46). The insulating rotating column (44) is driven to rotate by an adjustment box (47) to switch the connection state between the wiring seat (45) or the test seat (46) and the connection seat (43); An air guide plate (20), fixed inside the main chamber body (11), guiding the air flow to discharge from the heat dissipation mechanism (2).

2. The current performance testing device according to claim 1, wherein The adjustment box (47) includes: An adjustment motor (471), the output shaft of which is connected to an adjustment worm (472); An adjustment rotating shaft (474), with an adjustment turbine (473) meshing with the adjustment worm (472) at one end and an adjustment gear (475) at the other end; An adjustment gear ring (476), fixed to the outside of the insulating rotating column (44) and meshing with the adjustment gear (475), for driving the insulating rotating column (44) to rotate.

3. The current performance testing device according to claim 1, wherein At the ends of the wiring seat (45) and the test seat (46), connection ejector rods (481) are provided, and insulating elastic sheets (482) are covered on the outside. Inside the test seat (46), a connecting rod (48) is provided, and the connecting rod (48) is connected to the test equipment inside the test equipment rack (13). One end of the insulating elastic sheet (482) is supported on the test seat (46) or the wiring seat (45) to ensure the stability of electrical contact.

4. The current performance testing device according to claim 1, characterized in that, At the end of the insulating shell (41), a connection pressing piece (42) is provided for fixing the wires of the power system, and one end of the connection pressing piece (42) is connected to the connection seat (43).

5. The current performance testing device according to claim 1, characterized in that On the inner wall of the reinforcing inner ring (32), a spiral elastic sheet (33) is provided, with one end fixed to the outside of the elastic contraction band (35), for enhancing the tightening force on the wires.

6. The current performance testing device according to claim 1, wherein At the lower end of the box body shell (31), a winding box (37) is provided, which contains a winding column (372) driven by a winding motor (371). Guide pieces (373) are provided on the surface of the winding column (372), and the winding column (372) controls the tightness of the elastic contraction band (35) through a contraction pull rope (36).

7. The current performance testing device according to claim 6, wherein, One end of the contraction pull rope (36) is fixed to the inside of the elastic contraction band (35), and the other end is wound around a guide post (38) and a guide tube (39) and then connected to the winding column (372) to ensure the stability of the pulling rope winding direction.

8. The current performance testing device according to claim 1, characterized in that An air inlet (212) is provided on the upper side of the air inlet box (21). An air extraction port (221) and an air outlet (223) are respectively provided on the upper and lower sides of the exhaust box (22). The air extraction port (221) is aligned with the position of the test equipment rack (13) for efficient heat dissipation.

9. The current performance testing device according to claim 1, characterized in that, The installation mechanism (5) includes an installation base (51) and a fixing base (52), which are fixed by the cooperation of a clamping groove (53) and a clamping plate (54). A limiting block (55) is provided at one end of the fixing base (52), and a ventilation hole (56) is provided inside the fixing base (52) for assisting heat dissipation.

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