A voltage transformer error test platform

Abstract

The utility model relates to a voltage transformer technical field discloses a voltage transformer error test platform, including rotating platform, bearing rotation connection in test platform top, and test instrument symmetry sets up in rotating platform top, interface, symmetry sets up in rotating platform top, and interface is connected with test instrument one to one, motor no. 1 sets up in support, and motor no. 1 output shaft is fixedly connected with rotating platform top end. The voltage transformer is placed in test platform top, and is fixed through the fixed mechanism, and then the staff selects the test project required on the controller, and then the controller starts motor no. 1, and motor no. 1 drives rotating platform rotation, and the specific test instrument on rotating platform is rotated to voltage transformer one side, and then the test instrument and voltage transformer are connected and are tested, and the position of test instrument can be adjusted through the controller, and voltage transformer or test instrument does not need to be frequently carried, thereby increasing the convenience of testing.

Description

Technical Field

[0001] This utility model relates to the field of voltage transformer technology, specifically to a voltage transformer error testing platform. Background Technology

[0002] A voltage transformer (PT) is a core auxiliary device in a power system. Its core function is to reduce high voltage (e.g., 10kV, 110kV) to a lower voltage (e.g., 10000 / 100V) according to a fixed ratio, supplying power to voltmeters, relay protection devices, and other equipment. This serves two purposes: first, ensuring the safety of personnel and low-voltage equipment by preventing direct contact with high voltage; and second, providing standard voltage signals to metering and protection systems to ensure their accurate operation. The testing platform needs to simulate actual operating conditions, inputting different voltage signals to the PT under test while simultaneously acquiring its output signal. The output signal is then compared with a standard voltage signal to calculate the PT's ratio error and phase difference, determining whether it conforms to national standards.

[0003] Test data is scattered across different instruments, and voltage transformer testing needs to be matched with different voltage levels (such as 10kV, 35kV, 110kV) and corresponding standard transformers and voltage regulators of different specifications. Traditional layouts require multiple fixed positions, occupying a lot of space, and the voltage transformers or test instruments need to be moved during testing, which is quite cumbersome. Utility Model Content

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides a voltage transformer error testing platform, which has the advantage of being easy to test. It solves the problems of test data being scattered in different instruments, and the need for voltage transformer testing to match different voltage levels and corresponding standard transformers and voltage regulators of different specifications. Traditional layouts require multiple fixed positions, occupying a lot of space, and require moving voltage transformers or testing instruments during testing, which is quite cumbersome.

[0005] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: a voltage transformer error testing platform, comprising a main body assembly, wherein the main body assembly includes: The testing platform is equipped with testing instruments on its top; The testing platform and the testing instrument are equipped with adjustment components, the adjustment components including: The bearing is located on top of the test platform; A rotating platform is rotatably connected to the top of the test platform via the bearing, and the test instruments are symmetrically arranged above the rotating platform; The interfaces are symmetrically located on the top of the rotating platform, and each interface is connected to one of the testing instruments. The bracket is fixedly connected to the top of the test platform; Motor 1 is mounted on the bracket, and the output shaft of Motor 1 is fixedly connected to the top of the rotating platform. A fixing mechanism is installed on the test platform.

[0006] Preferably, the fixing mechanism includes: A cavity is symmetrically formed at the top of the test platform; A bidirectional lead screw passes through and is rotatably connected to the cavity; A threaded block is symmetrically and threadedly connected to the outside of the bidirectional lead screw, and the threaded block is slidably connected to the cavity; Motor 2 is installed on the outer wall of the test platform, and the output shaft of Motor 2 is fixedly connected to one end of the bidirectional lead screw. A clamping block is symmetrically and fixedly connected to the top of the threaded block; A pressure sensor is located within one of the clamping blocks.

[0007] Preferably, a controller is provided on the top of the test platform, and the controller is electrically connected to the test instrument, the first motor, the second motor, and the pressure sensor.

[0008] Preferably, the opposing surfaces of the clamping blocks are provided with rubber pads.

[0009] Preferably, a telescopic shell is provided on both the inner wall of the cavity and the facing surface of the threaded block, and the telescopic shell is located above the bidirectional lead screw.

[0010] Preferably, the top of the rotating platform is symmetrically and fixedly connected to a frame.

[0011] (III) Beneficial Effects Compared with the prior art, this utility model provides a voltage transformer error test platform, which has the following beneficial effects: This testing platform offers the advantage of convenient testing. The voltage transformer is placed on top of the platform and secured by a fixing mechanism. The operator then selects the desired test item on the controller. Upon receiving the instruction, the controller searches its internal lookup table for the corresponding test instrument station. The controller then activates motor one, which rotates the rotating platform, moving the specific test instrument to the side of the voltage transformer. The test instrument is then connected to the voltage transformer for testing. The controller allows adjustment of the test instrument's position, eliminating the need for frequent movement of the voltage transformer or test instrument, thus increasing testing convenience. This solution addresses the problems of scattered test data across different instruments, and the need for voltage transformer testing to match different voltage levels and corresponding standard transformers and voltage regulators. Traditional layouts require multiple fixed stations, occupying significant space, and cumbersome procedures involving moving the voltage transformer or test instrument during testing. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the rear view structure of this utility model; Figure 3 This is a schematic diagram of the right-side cross-sectional structure of the test platform in this utility model; Figure 4 This is an enlarged structural diagram of point A in this utility model; Figure 5 This is a top view of the rotating platform structure in this utility model.

[0013] In the picture: 1. Main components; 11. Test platform; 12. Test instruments; 2. Adjustment assembly; 21. Bearing; 22. Rotating platform; 23. Interface; 24. Bracket; 25. Motor 1; 26. Fixing mechanism; 261. Cavity; 262. Bidirectional lead screw; 263. Threaded block; 264. Motor 2; 265. Clamping block; 266. Pressure sensor; 27. Controller; 3. Frame; 4. Telescopic shell; 5. Rubber pad. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0015] See Figure 1-5 A voltage transformer error testing platform includes a main component 1, which comprises: a testing platform 11 with a testing instrument 12 mounted on its top; an adjustment component 2 on the testing platform 11 and the testing instrument 12, the adjustment component 2 comprising: a bearing 21 mounted on the top of the testing platform 11; a rotating platform 22 rotatably connected to the top of the testing platform 11 via the bearing 21, with the testing instrument 12 symmetrically arranged above the rotating platform 22; interfaces 23 symmetrically located on the top of the rotating platform 22, each interface 23 connected to one of the testing instruments 12; a bracket 24 fixedly connected to the top of the testing platform 11; a motor 25 mounted on the bracket 24, with the output shaft of the motor 25 fixedly connected to the top of the rotating platform 22; and a fixing mechanism 26 mounted on the testing platform 11. The fixing mechanism 26 includes: a cavity 261 symmetrically formed on the top of the test platform 11; a bidirectional lead screw 262 passing through and rotatably connected to the cavity 261; a threaded block 263 symmetrically and threadedly connected to the outside of the cavity 261, the threaded block 263 being slidably connected to the bidirectional lead screw 262; a second motor 264 disposed on the outer wall of the test platform 11, the output shaft of the second motor 264 being fixedly connected to one end of the bidirectional lead screw 262; a clamping block 265 symmetrically and fixedly connected to the top of the threaded block 263; and a pressure sensor 266 disposed in one side of the clamping block 265. A controller 27 is disposed on the top of the test platform 11, the controller 27 being electrically connected to the test instrument 12, the first motor 25, the second motor 264, and the pressure sensor 266.

[0016] In use, the operator first places the voltage transformer on top of the test platform 11 and fixes it with the fixing mechanism 26. The operator starts the second motor 264 through the controller 27. The second motor 264 drives the bidirectional lead screw 262 to rotate. The threaded blocks 263 connected to the threaded on the bidirectional lead screw 262 approach each other. When the clamping blocks 265 contact the outer wall of the voltage transformer, pressure is generated. When the pressure reaches the set threshold, the pressure sensor 266 sends an electrical signal to the controller 27. The controller 27 shuts off the second motor 264. At this time, the clamping blocks 265 on both sides provide stable support to the voltage transformer. The staff then selects the required test item on the controller 27. After receiving the instruction, the controller 27 searches for the corresponding test instrument 12 position in the internal lookup table. The controller 27 then starts the motor 25, which drives the rotating platform 22 to rotate, moving the specific test instrument 12 on the rotating platform 22 to the side of the voltage transformer. The test instrument 12 is then connected to the voltage transformer for testing. The position of the test instrument 12 can be adjusted through the controller 27, eliminating the need to frequently move the voltage transformer or the test instrument 12, thus increasing the convenience of testing.

[0017] The aforementioned testing instrument 12 can be the "brain" of the detection system, simultaneously acquiring the secondary voltage signals of the standard current transformer and the current transformer under test, automatically calculating and displaying the ratio error and phase difference, and storing and printing test data. It also serves as a current transformer calibrator to determine whether the current transformer is qualified, providing an "adjustable test voltage" for the current transformer under test. This voltage can be gradually increased from 0 to 120% of the rated voltage to simulate different operating conditions, meeting the error detection requirements at different voltage points. It is typically used in conjunction with a high-voltage isolation unit to ensure a safe voltage regulator and control the on / off state of the test circuit, while also providing overcurrent and overvoltage protection functions. If an abnormal voltage or short circuit occurs during the test, it can quickly cut off the power supply to prevent damage to the current transformer under test or the high-voltage switch and protection unit of the platform instrument. The bearing 21 and the rotating platform 22 are designed as hollow shafts. A hollow shaft slip ring is directly integrated into or below the bearing 21. The rotor of the slip ring is fixed to the hollow shaft of the rotating platform 22 and rotates with the rotating platform 22. The stator of the slip ring is connected to the bottom test platform 11. All the test instrument 12 cables connected to the rotating platform 22 via interface 23 converge inside the rotating platform 22, pass downward through the hollow shaft, and connect to the rotor of the slip ring. The cables leading out from the stator of the slip ring are routed inside the test platform 11 and connected to core equipment such as the current transformer calibrator. As long as the error test of the voltage transformer can be achieved, the structure and wiring of the test instrument 12 will not be described in detail here. Example

[0018] An auxiliary function has been added based on Embodiment 1.

[0019] See Figure 1-5 Each of the clamping blocks 265 has a rubber pad 5 on its facing surface. The inner wall of the cavity 261 and the facing surface of the threaded block 263 are each provided with a telescopic shell 4, which is located above the bidirectional lead screw 262. A frame 3 is symmetrically and fixedly connected to the top of the rotating platform 22.

[0020] When clamping block 265 holds the voltage transformer, the rubber pad 5 on the facing surface increases the friction between clamping block 265 and the voltage transformer, enhancing the stability of the clamping and preventing damage to the surface of the voltage transformer. When threaded block 263 drives clamping block 265 closer together, the telescopic shell 4 fixedly connected to the facing surface of threaded block 263 retracts, and the telescopic shell 4 fixed on the outer side extends. When threaded block 263 drives clamping block 265 away from each other, the telescopic shell 4 fixed to the facing surface of threaded block 263 extends, and the telescopic shell 4 fixed on the outer side retracts. The telescopic shell 4 shields the cavity 261, preventing foreign objects from entering the cavity 261 and affecting the normal use of bidirectional lead screw 262 and threaded block 263. After the test is completed, the connected wires of test instrument 12 can be wound on the frame 3. The frame 3 stores the wires, preventing the wires of test instrument 12 from getting tangled when the rotating platform 22 rotates.

[0021] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A voltage transformer error test platform, comprising a main component (1), wherein the main component (1) includes: The test platform (11) has a test instrument (12) on its top. The feature is that: the test platform (11) and the test instrument (12) are provided with adjustment components (2), the adjustment components (2) include: The bearing (21) is located on top of the test platform (11); A rotating platform (22) is rotatably connected to the top of the test platform (11) via the bearing (21), and the test instrument (12) is symmetrically arranged above the rotating platform (22); Interfaces (23) are symmetrically located on the top of the rotating platform (22), and each interface (23) is connected to the testing instrument (12). The bracket (24) is fixedly connected to the top of the test platform (11); Motor 1 (25) is mounted on the bracket (24), and the output shaft of Motor 1 (25) is fixedly connected to the top of the rotating platform (22); The fixing mechanism (26) is set on the test platform (11).

2. The voltage transformer error test platform according to claim 1, characterized in that: The fixing mechanism (26) includes: A cavity (261) is symmetrically opened on the top of the test platform (11); A bidirectional lead screw (262) passes through and is rotatably connected to the cavity (261); A threaded block (263) is symmetrically and threadedly connected to the outside of the bidirectional lead screw (262), and the threaded block (263) is slidably connected to the cavity (261); Motor 2 (264) is set on the outer wall of the test platform (11), and the output shaft of Motor 2 (264) is fixedly connected to one end of the bidirectional lead screw (262); Clamping block (265) is symmetrically and fixedly connected to the top of the threaded block (263); A pressure sensor (266) is disposed within the clamp (265) on one side.

3. The voltage transformer error test platform according to claim 2, characterized in that: The test platform (11) is equipped with a controller (27) on top, and the controller (27) is electrically connected to the test instrument (12), the first motor (25), the second motor (264) and the pressure sensor (266).

4. The voltage transformer error test platform according to claim 3, characterized in that: Each of the clamping blocks (265) has a rubber pad (5) on its facing surfaces.

5. The voltage transformer error test platform according to claim 4, characterized in that: The inner wall of the cavity (261) and the facing surface of the threaded block (263) are both provided with telescopic shells (4), and the telescopic shells (4) are located above the bidirectional lead screw (262).

6. The voltage transformer error test platform according to claim 5, characterized in that: The rotating platform (22) is symmetrically and fixedly connected to a frame (3) at its top.

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