Transformer area line loss line positioning device and use method thereof
By designing a line loss locating device for transformer substations, and using an arc-shaped rod and a limiting plate structure to fix the conductor, the safety and reading accuracy issues of clamp-on ammeters were solved, enabling safe measurement and accurate readings without power interruption.
Patent Information
- Application Number
- CN202511552364.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-28
- Publication Date
- 2026-01-13
AI Technical Summary
When using a clamp meter to measure current, it is impossible to determine whether there is leakage, and the close proximity of the wires may cause injury to workers. Furthermore, in a three-phase system, the magnetic field interference of multiple wires affects the accuracy of the reading.
A line loss locating device for transformer substations was designed. The device uses an arc-shaped rod and a limiting plate structure to fix the conductor, preventing workers from getting electric shocks. It also reduces magnetic field interference by changing the direction and distance of the undetected conductor, ensuring accurate readings.
It effectively prevents workers from getting electric shock, reduces the impact of untested wires on readings, and improves measurement accuracy, especially when multiple wires are fixed in a three-phase system.
Smart Images
Figure CN121324702A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a line loss locator for transformer substations and its usage method, belonging to the field of power detection equipment. Background Technology
[0002] A clamp meter, also known as a clamp meter, is an instrument used to measure the current in an operating electrical circuit. When measuring current, the circuit under test usually needs to be disconnected so that the primary side of the ammeter or transformer can be connected in series with the circuit. However, when using a clamp meter to measure current, it can be done without disconnecting the circuit.
[0003] However, during use, because the power is not interrupted, workers cannot determine whether there is a leakage without testing. Furthermore, the wires are close together, and rashly touching the wires by hand could easily cause injury. Therefore, it is necessary to make improvements. Summary of the Invention
[0004] The purpose of this invention is to solve the aforementioned problems in the background art by providing a transformer substation line loss location device and its usage method.
[0005] The present invention achieves the above objectives by adopting the following technical solution: A transformer substation line loss locating device includes a clamp-on ammeter body; the upper end of the clamp-on ammeter body is connected to two shafts via bearings; each shaft is keyed with a jaw; one of the jaws has a button on its side for controlling the opening and closing of the jaws, and an elastic component for button reset is provided between the button and the clamp-on ammeter body; each shaft is keyed with a gear, and the outer surface of the shaft has an arc-shaped groove, and a sleeve is fitted onto the outer side of the shaft; a limiting block that slides with the arc-shaped groove is fixedly connected to the inner wall of the sleeve; a spring is provided between the limiting block and the inner wall of the arc-shaped groove; a connecting rod I is fixedly connected to the outer surface of the sleeve, and an arc-shaped rod is fixedly connected to the other end of the connecting rod I.
[0006] A method of using a transformer substation line loss locator includes the following steps: Step 1: Press and hold the button to open the jaws; Step 2: Move the arc-shaped rod to both sides of the wire to be tested, and insert the untested wire adjacent to the wire to be tested into the gap between the arc-shaped plate and the limiting plate; Step 3: Release the button to close the jaws, and use the curved rod to fix the wire to be tested, while tilting the wire not being tested. Compared with the prior art, the beneficial effects of the present invention are: it can not only prevent workers from being electrocuted, but also, during use, the wires or multiple wires in a three-phase system can be fixed by the arc rod. Furthermore, the direction and distance of the undetected wires can be changed by the gap between the arc plate and the limiting plate, reducing the influence of the magnetic field generated by the current in the undetected wires on the detection results and ensuring more accurate readings. Attached Figure Description
[0007] Figure 1 This is a front view of a transformer substation line loss location device according to the present invention; Figure 2 yes Figure 1 A cross-sectional view along the AA direction; Figure 3 This is a schematic diagram of the application of a transformer substation line loss location device of the present invention in a three-phase system; Figure 4 This is a cross-sectional view of the shaft and sleeve of a line loss positioning device for transformer substations according to the present invention. Figure 5 This is a front view of a fixed conductor to be tested in a transformer substation line loss locating device according to the present invention; Figure 6 yes Figure 5 Cross-sectional view along the BB direction; Figure 7 yes Figure 5 A cross-sectional view along the CC direction; Figure 8 This is a front view of the clamps and arc-shaped rod of a line loss locating device for transformer substations according to the present invention, in the open state. Detailed Implementation
[0008] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the invention, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.
[0009] Specific implementation method one: as follows Figure 1-8As shown, this embodiment describes a line loss locating device for a transformer substation, including a clamp-on ammeter body 1; the upper end of the clamp-on ammeter body 1 is connected to two shafts 10 via bearings; each shaft 10 is keyed with a jaw 6; one of the jaws 6 has a button 2 on its side for controlling the opening and closing of the jaws 6, and an elastic component for resetting the button 2 is provided between the button 2 and the clamp-on ammeter body 1; each shaft 10 is keyed with a gear 8, and the outer surface of the shaft 10 has an arc groove 101, and a sleeve 9 is sleeved on the outer side of the shaft 10; a limiting block 92 that slides with the arc groove 101 is fixedly connected to the inner wall of the sleeve 9; a spring 91 is provided between the limiting block 92 and the inner wall of the arc groove 101; a connecting rod I 11 is fixedly connected to the outer surface of the sleeve 9, and an arc rod 7 is fixedly connected to the other end of the connecting rod I 11. The position of the conductor 14 to be tested is fixed by the arc rod 7, eliminating the need for workers to touch the conductor by hand and reducing the risk of electric shock.
[0010] The gears 8 on the two shafts 10 mesh.
[0011] The opening of the arc-shaped rod 7 faces the same direction as the opening of the jaw 6 connected to the same shaft 10.
[0012] The central angle corresponding to the arc-shaped rod 7 is greater than 180°.
[0013] As the jaws 6 open, the two arc-shaped rods 7 located on the same side of the jaws 6 move in opposite directions, and the upper ends of the two arc-shaped rods 7 are exposed to allow the wire 14 to be tested to pass through the gap.
[0014] Each sleeve 9 is also fixedly connected to an arc-shaped plate 4 via a connecting rod II 3 on its outer circular surface; the inner wall of the arc-shaped plate 4 is attached to the outer wall of the jaw 6; a limiting plate 5 is fixedly connected to the outer circular surface of the arc-shaped plate 4 via a connecting plate. The undetected wire 13 is embedded in the gap between the limiting plate 5 and the arc-shaped plate 4, and the distance between the wire to be detected 14 and the undetected wire 13 is increased by the thickness of the arc-shaped plate 4.
[0015] A gap is provided between the limiting plate 5 and the arc plate 4 for the undetected wire 13 to pass through.
[0016] like Figure 7 As shown, in the direction from the free end of the arc-shaped plate 4 to the connection end between the arc-shaped plate 4 and the connecting rod II 3, the thickness of the arc-shaped plate 4 on one side of the jaw 6 gradually increases; in the direction from the free end of the limiting plate 5 to the fixed end, the thickness of the limiting plate 5 on the other side of the jaw 6 gradually increases. The increased thickness of the arc-shaped plate 4 and the limiting plate 5 changes the orientation of the gap between them, thereby changing the orientation of the undetected wire 13 located inside them, making it not parallel to the wire 14 to be detected, thus reducing the influence of the magnetic field.
[0017] After the two arc-shaped rods 7 clamp the wire 14 to be tested, the jaws 6 close.
[0018] A method of using a transformer substation line loss locator includes the following steps: Step 1: Press and hold button 2 to open jaws 6; Step 2: Move the arc-shaped rod 7 to both sides of the wire to be tested 14, and insert the untested wire 13 adjacent to the wire to be tested 14 into the gap between the arc-shaped plate 4 and the limiting plate 5; Step 3: Release button 2 to close jaws 6, and fix the wire to be tested 14 with the arc rod 7, while tilting the wire not being tested 13.
[0019] The working principle of this invention is as follows: When using this device, pressing button 2 causes the jaws 6 to open, and simultaneously the jaws 6 cause the shaft 10 to rotate. The inner wall of the arc-shaped groove 101 on the shaft 10 pushes the limiting block 92 to rotate the sleeve 9, thereby causing the arc-shaped rod 7, the arc-shaped plate 4, and the limiting plate 5 to open together, achieving the desired effect. Figure 8 The state shown; Move the two arc-shaped rods 7 to both sides of the wire to be tested 14, and insert the untested wire 13 adjacent to the wire to be tested 14 into the gap between the arc-shaped plate 4 and the limiting plate 5. Release button 2 to close jaws 6. As the arc rod 7 moves back to its original position, it blocks the wire to be tested 14. After jaws 6 moves to its original position, it drives shaft 10 to rotate to its original position, thereby causing limit block 92 to compress spring 91. The force of spring 91 causes arc rod 7 to clamp and fix the wire to be tested 14. At the same time, the untested wire 13 enters the gap between arc plate 4 and limit plate 5 and tilts. At this time, the wire 14 to be tested is fixed near the center of the jaws 6, eliminating the need for workers to touch the wire and preventing electric shock. Simultaneously, as the jaws 6 close, the thickness of the arc-shaped plate 4 on one side of the jaws 6 gradually increases from its free end to the connection point between the arc-shaped plate 4 and the connecting rod II 3; similarly, the thickness of the limiting plate 5 on the other side of the jaws 6 gradually increases from its free end to its fixed end, causing the gap between the limiting plate 5 and the arc-shaped plate 4 to gradually tilt (e.g., ...). Figure 7 As shown in the diagram, when the undetected conductor 13 moves in the gap between the limiting plate 5 and the arc plate 4, its orientation changes, meaning it is no longer parallel to the conductor 14 to be detected (the clamp meter can only sense the total magnetic field strength and cannot identify the source of the magnetic field. The magnetic fields generated by all current-carrying conductors will be vector-superimposed at the clamp jaws, causing abnormal readings), thus twisting the interfering conductor into a non-parallel direction, which can reduce coupling.
[0020] Simultaneously, due to the arrangement of the arc-shaped plate 4, when the wire to be tested 14 is located inside the arc-shaped rod 7, the arc-shaped plate 4 can push the untested wires 13 on both sides away from the wire to be tested 14, thereby increasing the distance between the untested wires 13 and the wire to be tested 14, further reducing the influence on the reading; (the wire to be tested is separated from other energized wires by a sufficient distance. The greater the distance, the faster the interfering magnetic field attenuates, and the smaller the influence.) When testing a three-phase system, multiple conductors 12 need to be tested simultaneously. Since there is a gap between the multiple conductors 12, when using a clamp meter on the market, the large gap between the conductors 12 amplifies the difference in distance from each phase conductor to the center of the clamp 6, resulting in unequal magnetic field strength at the sensor for each phase, which affects the reading results. This application can use an arc rod 7 to bring the conductors 12 as close as possible to reduce the impact on the reading.
[0021] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of the equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
[0022] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A line loss locating device for a transformer substation, characterized in that: The device includes a clamp-on ammeter body (1); the upper end of the clamp-on ammeter body (1) is connected to two shafts (10) via bearings; each shaft (10) is keyed with a jaw (6); one of the jaws (6) has a button (2) on its side for controlling the opening and closing of the jaw (6), and an elastic component for resetting the button (2) is provided between the button (2) and the clamp-on ammeter body (1); each shaft (10) is keyed with a gear (8), and the outer surface of the shaft (10) is provided with an arc groove (101), and a sleeve (9) is sleeved on the outer side of the shaft (10); a limiting block (92) that slides with the arc groove (101) is fixedly connected to the inner wall of the sleeve (9); a spring (91) is provided between the limiting block (92) and the inner wall of the arc groove (101); a connecting rod I (11) is fixedly connected to the outer surface of the sleeve (9), and an arc rod (7) is fixedly connected to the other end of the connecting rod I (11).
2. The transformer substation line loss locating device according to claim 1, characterized in that: The gears (8) on the two shafts (10) mesh.
3. The transformer substation line loss locating device according to claim 2, characterized in that: The opening of the arc-shaped rod (7) faces the same direction as the opening of the jaw (6) connected on the same shaft (10).
4. A transformer substation line loss locating device according to claim 3, characterized in that: The central angle corresponding to the arc-shaped rod (7) is greater than 180°.
5. A transformer substation line loss locating device according to claim 4, characterized in that: As the jaws (6) open, the two arc-shaped rods (7) located on the same side of the jaws (6) move in opposite directions, and the upper ends of the two arc-shaped rods (7) are exposed to allow the wire (14) to be tested to pass through the gap.
6. A transformer substation line loss locating device according to claim 1 or 5, characterized in that: Each sleeve (9) is also fixedly connected to an arc plate (4) via a connecting rod II (3) on its outer circular surface; the inner wall of the arc plate (4) is attached to the outer wall of the jaw (6); a limit plate (5) is fixedly connected to the outer circular surface of the arc plate (4) via a connecting plate.
7. A transformer substation line loss locating device according to claim 6, characterized in that: A gap is provided between the limiting plate (5) and the arc plate (4) for the undetected wire (13) to pass through.
8. A transformer substation line loss locating device according to claim 7, characterized in that: In the direction from the free end of the arc plate (4) to the connection end of the arc plate (4) and the connecting rod II (3), the thickness of the arc plate (4) on the jaw (6) side gradually increases; in the direction from the free end of the limiting plate (5) to the fixed end, the thickness of the limiting plate (5) on the other side of the jaw (6) gradually increases.
9. A transformer substation line loss locating device according to claim 8, characterized in that: After the two arc-shaped rods (7) clamp the wire (14) to be tested, the jaws (6) close.
10. The method of using the transformer substation line loss locator according to claim 9, characterized in that: The method of use includes the following steps: Step 1: Press and hold button (2) to open the jaws (6); Step 2: Move the arc rod (7) to both sides of the wire to be tested (14), and insert the untested wire (13) adjacent to the wire to be tested (14) into the gap between the arc plate (4) and the limiting plate (5); Step 3: Release button (2) to close jaws (6) and fix the wire to be tested (14) with the arc rod (7), while tilting the wire not being tested (13).