Transformer electric leakage detection device

Abstract

The utility model relates to the field of transformer detection, in particular to a transformer electric leakage detection device. The utility model provides the electric leakage detection device for the transformer, which is capable of spraying inert gas to isolate air for protection during power failure, cooling the connecting wire, preventing oxidation reaction or electric arc, reducing the risk of safety accidents, improving the use safety and being convenient to use. A transformer electric leakage detection device comprises a transformer, high-voltage terminals and the like, and the upper side of the right front part of the transformer is connected with a plurality of high-voltage terminals. According to the utility model, the control valve is controlled to be opened, so that inert gas enters the arc extinguishing box to isolate oxygen and prevent air discharge when the connecting wire is disconnected, and the communicating contacts are separated through the partition plate, so that the inert gas can be sprayed out during power failure to isolate air for protection, and meanwhile, the connecting wire is cooled and oxidation reaction or electric arc is prevented; the risk of safety accidents is reduced, the use safety is improved, and the use is convenient.

Description

Technical Field

[0001] This utility model relates to the field of transformer testing, and in particular to a transformer leakage current detection device. Background Technology

[0002] In power systems, transformers are key equipment for power transmission and distribution, and their operational stability and safety directly affect the reliable operation of the entire power grid. However, during use, transformers may experience leakage due to prolonged exposure to high voltage and high current, as well as the influence of environmental factors. This not only leads to power loss but may also cause serious safety accidents such as fires and explosions, posing a significant threat to personnel and property.

[0003] Existing transformer leakage detection typically relies on detection equipment to monitor the transformer's output current and analyze data such as resistance changes to determine if there is leakage. However, when a transformer leaks and power needs to be cut off, current detection equipment cannot take timely isolation and protection measures. At the moment of power cut-off, the arc and high temperature generated by the sudden change in current can easily cause oxidation reactions, accelerate equipment aging, and may also cause fires, affecting the safety of use and making it inconvenient to use.

[0004] Therefore, it is necessary to design a transformer leakage detection device that can spray inert gas to isolate the air for protection during power failure, while cooling the connecting wires to prevent oxidation or electric arc, reduce the risk of safety accidents, improve safety, and be easy to use. Utility Model Content

[0005] To overcome the shortcomings of current detection equipment, which cannot take timely isolation and protection measures, and which may generate electric arcs and high temperatures due to sudden current changes at the moment of power failure, which can easily cause oxidation reactions, accelerate equipment aging, and even cause fires, affecting safety and making it inconvenient to use, this utility model provides a transformer leakage current detection device that can spray inert gas to isolate air for protection during power failure, while cooling the connecting wires to prevent oxidation reactions or electric arcs, reduce the risk of safety accidents, improve safety, and is easy to use.

[0006] The technical solution of this utility model is: a transformer leakage detection device, including a transformer, high-voltage terminals, low-voltage terminals, a support frame, current transformers, an isolation component, and a power-off component. Multiple high-voltage terminals are connected to the upper right front part of the transformer, and multiple low-voltage terminals are connected to the upper left rear part of the transformer. Both the high-voltage terminals and the low-voltage terminals are provided with connecting wires. The support frame is placed on the ground and is located on the left side of the transformer. Multiple current transformers are connected to the upper right part of the support frame. The current transformers are all connected to the connecting wires on the low-voltage terminals at the same horizontal position. The support frame is provided with an isolation component for isolating when the connecting wires are de-energized, and the isolation component is provided with a power-off component for disconnecting when leakage occurs.

[0007] Furthermore, the isolation assembly includes an arc-extinguishing box, an inert gas storage tank, a control valve, a pressure detector, and partitions. The arc-extinguishing box is connected to the upper side of the support frame. The ends of the connecting wires on the low-voltage terminals all pass through the arc-extinguishing box. The inert gas storage tank is connected to the rear of the arc-extinguishing box. The control valve is connected to the lower front of the inert gas storage tank. The pressure detector is connected to the rear of the arc-extinguishing box. Two partitions are connected to the inner sides of both the left and right sides of the arc-extinguishing box.

[0008] Furthermore, the arc-extinguishing box is made of transparent material.

[0009] Furthermore, the power-off assembly includes a slider, a sliding sleeve, a spring, a baffle, a lead screw, a motor, a flat belt, and a connecting contact. Multiple connecting lines are also slidably arranged on the lower left side of the arc-extinguishing box. Multiple sliding sleeves are connected to the left side of the arc-extinguishing box, and sliders are slidably connected to each sleeve. Each slider is slidably connected to the arc-extinguishing box and connected to a connecting line on the left side of the arc-extinguishing box at the same lateral position. A spring connects each slider to a sliding sleeve at the same lateral position. Lead screws are rotatably connected to both the front and rear parts of the arc-extinguishing box, and baffles are threaded between the lead screws. Partitions contact the baffles. A motor is connected to the upper middle part of the arc-extinguishing box, and a flat belt is wound around the output shaft of each lead screw via a pulley. Connecting contacts are connected to the connecting lines on the low-voltage terminals and the connecting lines on the left side of the arc-extinguishing box.

[0010] Furthermore, all the sliding sleeves are L-shaped.

[0011] Furthermore, both the partitions and baffles are made of insulating materials.

[0012] The beneficial effects are: 1. By controlling the opening of the control valve, the inert gas enters the arc-extinguishing box to isolate oxygen and prevent discharge to the air when the connecting wire is disconnected. The connecting contacts are separated by the partition, so that when the power is cut off, the inert gas is sprayed out to isolate the air for protection while cooling the connecting wire, preventing oxidation reaction or electric arc, reducing the risk of safety accidents, improving the safety of use, and making it convenient to use.

[0013] 2. When leakage occurs, this utility model rotates the lead screw, causing the baffle to move and contact the slider under the action of the thread. This causes the slider to move, which in turn causes the connecting line on the left side of the arc extinguishing box to move, thus disconnecting the connecting contact and cutting off the power. This allows the transformer to be de-energized when leakage is detected, preventing electric shock accidents, preventing fires, ensuring the safety of operators, preventing damage to electrical equipment, and extending its service life. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0015] Figure 2 This is a three-dimensional structural diagram of the current transformer and arc-extinguishing box components of this utility model.

[0016] Figure 3 This is a schematic diagram of the structure of the control valve and air pressure detector of this utility model.

[0017] Figure 4 This is a three-dimensional cross-sectional view of the lead screw and slider components of this utility model.

[0018] Figure 5 This is a cross-sectional schematic diagram of the structure of the sliding sleeve and connecting contact and other components of this utility model.

[0019] Figure 6 This is a schematic diagram of the structure of the slider and spring components of this utility model.

[0020] Figure 7 This is a three-dimensional structural diagram of the partition and baffle components of this utility model.

[0021] In the attached diagram, the following labels are used: 1-Transformer, 101-Slider, 102-Sliding sleeve, 103-Spring, 2-High voltage terminal, 3-Low voltage terminal, 4-Support frame, 5-Current transformer, 6-Arc extinguishing box, 7-Inert gas storage tank, 8-Control valve, 9-Gas pressure detector, 10-Baffle, 11-Baffle plate, 12-Lead screw, 13-Motor, 14-Flat belt, 15-Connecting contact. Detailed Implementation

[0022] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0023] A transformer leakage current detection device, such as Figures 1-7As shown, the system includes a transformer 1, high-voltage terminals 2, low-voltage terminals 3, a support frame 4, current transformers 5, an isolation assembly, and a power-off assembly. Three high-voltage terminals 2 are connected to the upper right front part of the transformer 1, and three low-voltage terminals 3 are connected to the upper left rear part of the transformer 1. Connecting wires are provided on both the high-voltage terminals 2 and the low-voltage terminals 3. The support frame 4 is placed on the ground to the left of the transformer 1. Three current transformers 5 are connected to the upper right part of the support frame 4. Each current transformer 5 is connected to a connecting wire on a low-voltage terminal 3 at the same horizontal position. The support frame 4 is equipped with... An isolation assembly for isolating when the connecting line is de-energized includes an arc-extinguishing box 6, an inert gas storage tank 7, a control valve 8, a pressure detector 9, and partitions 10. The arc-extinguishing box 6 is connected to the upper side of the support frame 4. The tail ends of the connecting lines on the low-voltage terminal 3 all pass through the arc-extinguishing box 6. The arc-extinguishing box 6 is made of transparent material to facilitate observation of its internal operation. The inert gas storage tank 7 is connected to the rear of the arc-extinguishing box 6. The control valve 8 is connected to the lower front of the inert gas storage tank 7. The pressure detector 9 is connected to the rear of the arc-extinguishing box 6. Two partitions 10 are connected to the inner sides of the left and right sides of the arc-extinguishing box 6. The device is equipped with a power-off assembly for disconnecting power in the event of a leakage current. The power-off assembly includes a slider 101, a sliding sleeve 102, a spring 103, a baffle 11, a lead screw 12, a motor 13, a flat belt 14, and a connecting contact 15. Three connecting lines are also slidably arranged on the lower left side of the arc-extinguishing box 6. Three sliding sleeves 102 are connected to the left side of the arc-extinguishing box 6. Each sliding sleeve 102 is L-shaped, and a slider 101 is slidably connected to each sliding sleeve 102. Each slider 101 is slidably connected to the arc-extinguishing box 6 and connected to a connecting line on the left side of the arc-extinguishing box 6 at the same lateral position. The spring 103 is connected to the sliding sleeve 102 at the same lateral position. The lead screw 12 is rotatably connected to both the front and rear parts of the arc-extinguishing box 6. The baffle 11 is threadedly connected between the lead screw 12. The partition 10 is in contact with the baffle 11. The partition 10 and the baffle 11 are both made of insulating material to prevent electric shock. The motor 13 is connected to the upper side of the middle part of the arc-extinguishing box 6. The flat belt 14 is wound around the output shaft of the motor 13 through a pulley between the lead screw 12 and the output shaft of the motor 13. The connecting wire on the low-voltage terminal 3 is connected to the connecting wire on the left side of the arc-extinguishing box 6 with the connecting contact 15.

[0024] When leakage current detection of the transformer 1 is required, this device can be used. The transformer 1 and the support frame 4 are brought into contact with the ground, and then connected to the high-voltage terminal 2 via a connecting wire from the high-voltage equipment. Next, the connecting wire on the right side of the arc-extinguishing box 6 is connected to the low-voltage terminal 3. The arc-extinguishing box 6 is made of transparent material for easy observation of its internal operation. Then, the connecting wire on the left side of the arc-extinguishing box 6 is connected to electrical equipment, and the current is discharged through the high-voltage equipment to the transformer 1. The transformer 1 then changes the voltage, causing electricity to be output from the low-voltage terminal 3. The current is proportionally converted to a smaller current by the current transformer 5, allowing external instruments or other monitoring equipment to monitor the current. The system uses monitored data to determine if there is a leakage current in transformer 1. When a leakage current is detected, motor 13 is started, which drives the pulley to rotate, causing the flat belt 14 to rotate, which in turn rotates the lead screw 12. Under the action of the screw thread, the baffle 11 moves and contacts the slider 101, causing the slider 101 to move along the sliding sleeve 102. The sliding sleeves 102 are all L-shaped, and the spring 103 is compressed, causing the connecting line on the left side of the arc extinguishing box 6 to move, thus disconnecting the connecting contact 15 and cutting off the power. This allows the system to cut off the power to transformer 1 when a leakage current is detected, preventing electric shock accidents, preventing fires, ensuring the safety of operators, and preventing damage to electrical equipment. To extend service life, the control valve 8 is opened to allow inert gas from the inert gas storage tank 7 to enter the arc-extinguishing chamber 6, isolating oxygen and preventing discharge to air when the connection line is disconnected. After sufficient inert gas has entered, the control valve 8 is closed, and the pressure in the arc-extinguishing chamber 6 is detected by the pressure detector 9. When a pressure drop is detected, the control valve 8 is opened again to allow inert gas to re-enter the arc-extinguishing chamber 6 for use. The connecting contact 15 is separated by the partition 10, and the connection line is separated by the partition 10. Both the partition 10 and the baffle 11 are made of insulating material to prevent electric shock, thus enabling the release of inert gas when the power is off. While isolating the air for protection, the connecting wires are cooled to prevent oxidation or electric arcing, reducing the risk of safety accidents and improving safety and ease of use. The high-voltage equipment is then shut down, and the transformer 1 is repaired. After repair, the motor 13 is reversed, causing the pulley to rotate in the opposite direction, which in turn causes the flat belt 14 to rotate in the opposite direction, and the lead screw 12 to rotate in the opposite direction. Under the action of the thread, the baffle 11 moves in the opposite direction and disengages from the slider 101. The spring 103 rebounds, and the slider 101 moves in the opposite direction to reset, causing the connecting wire on the left side of the arc-extinguishing box 6 to move in the opposite direction, allowing the connecting contacts 15 to contact each other and conduct electricity. The transformer 1 can then be used again.

[0025] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A transformer leakage detection device, characterized by: The utility model provides a transformer, high voltage terminal, low voltage terminal, support frame, current transformer, insulation assembly and power-off assembly, the transformer (1) right front upper side is connected with a plurality of high voltage terminals (2), the transformer (1) left rear upper side is connected with a plurality of low voltage terminals (3), and the high voltage terminal (2) and low voltage terminal (3) are equipped with connecting wire, the support frame (4) is placed on the ground, and the support frame (4) is located the left side of transformer (1), and the support frame (4) right upper side is connected with a plurality of current transformers (5), and the current transformer (5) is connected with the connecting wire on the low voltage terminal (3) in the same horizontal position, and the support frame (4) is equipped with insulation assembly for insulation when the connecting wire is powered off, and the insulation assembly is equipped with power-off assembly for power-off when the electric leakage occurs.

2. The transformer leakage detection device of claim 1, wherein: The insulation assembly includes an arc-extinguishing box (6), an inert gas storage tank (7), a control valve (8), a gas pressure detector (9), and a partition plate (10), the support frame (4) upper side is connected with arc-extinguishing box (6), the tail end of the connecting wire on the low voltage terminal (3) passes through the arc-extinguishing box (6), the arc-extinguishing box (6) rear is connected with inert gas storage tank (7), the inert gas storage tank (7) front lower part is connected with control valve (8), the arc-extinguishing box (6) rear side is connected with gas pressure detector (9), the arc-extinguishing box (6) left and right two parts inner side are connected with front and back two partition plates (10).

3. The transformer leakage detection device of claim 2, wherein: The arc-extinguishing box (6) is made of transparent material.

4. The transformer leakage detection device of claim 3, wherein the power is interrupted. The assembly includes a sliding block (101), a sliding sleeve (102), a spring (103), a baffle (11), a lead screw (12), a motor (13), a flat belt (14), and a communication contact (15), the arc-extinguishing box (6) lower left side is also slidably provided with a plurality of connecting wires, the arc-extinguishing box (6) left side is connected with a plurality of sliding sleeves (102), the sliding sleeve (102) is slidably connected with a sliding block (101), the sliding block (101) is slidably connected with the arc-extinguishing box (6), the sliding block (101) is connected with the connecting wire on the left side of the arc-extinguishing box (6) in the same horizontal position, the sliding block (101) is connected with the sliding sleeve (102) in the same horizontal position through the spring (103), the arc-extinguishing box (6) front and rear parts are rotatably connected with the lead screw (12), the lead screw (12) is threadedly connected with the baffle (11) between them, the partition plate (10) is in contact with the baffle (11), the arc-extinguishing box (6) middle upper side is connected with the motor (13), the lead screw (12) is connected with the output shaft of the motor (13) through the belt wheel, and the connecting wire on the low voltage terminal (3) and the connecting wire on the left side of the arc-extinguishing box (6) are both connected with the communication contact (15).

5. The transformer leakage detection device of claim 4, wherein: The sliding sleeve (102) is L-shaped.

6. The transformer leakage detection device of claim 5, wherein: The partition plate (10) and the baffle (11) are made of insulating material.

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