Anti-miswiring test transformer

Abstract

The utility model discloses a false wiring prevention test transformer, which comprises a transformer body, an end cover is arranged at the top of the transformer body, a plurality of mutually independent wiring terminals are arranged on the upper surface of the end cover, an independent signboard is arranged on each wiring terminal, a false wiring prevention device is arranged on each signboard, and the false wiring prevention device is arranged on the transformer body. The anti-error wiring device comprises a photoelectric sensor and a controller, the controller is provided with a plurality of storage grooves, and each storage groove is internally provided with a data memory, the wiring process can be monitored in real time mainly through the photoelectric sensor and the controller, the wiring correctness is ensured, and if the wiring is wrong, the data memory can be stored in the storage grooves. When wiring is carried out, the controller gives an alarm immediately and automatically records error information to facilitate subsequent maintenance and inspection, the data memory is stored in each storage groove of the controller, and the controller compares the actual wiring color with the data memory in real time in the wiring process, so that the wiring correctness is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of electric power equipment, in particular to a miswiring prevention test transformer. Background Art

[0002] The function of the test transformer is to conduct AC or DC withstand voltage tests on power systems or power equipment before they are put into operation to check whether they have insulation defects or potential electrical faults. This test is crucial to ensure the safety and reliability of power systems. With the development of science and technology, people have higher and higher requirements for the safety and reliability of power equipment. Therefore, the technology of test transformers is also constantly improving and upgrading.

[0003] After searching, the Chinese patent document application number: 201910532611.3 discloses a test transformer, including a body, a wiring terminal is arranged on the top of the body, an outlet terminal board is arranged on the bottom of the front of the body, and an outlet terminal sleeve is arranged on the outside of the outlet terminal of the outlet terminal board. The test transformer substantially protects the iron core in the wiring terminal by adding a steel ring, an insulating sleeve, an HDPE sleeve, and a glass fiber reinforced plastic sleeve to the sleeve, and forming a sealed cavity. When the outer ceramic outer casing is accidentally worn, the glass fiber reinforced plastic sleeve will not be broken together due to the design of the sealed cavity, thereby enhancing the protection effect and the corrosion resistance and anti-aging performance of the wiring terminal, while not affecting the continued work. The design of the sealed cavity prevents the shattering force of the outer ceramic outer casing from being transmitted to the glass fiber reinforced plastic sleeve when it is hit, and the design of the sealed cavity also has moisture-proof and flame-retardant effects. The steel ring and the wrapped insulating sleeve give it a certain mechanical strength and rigidity.

[0004] However, the above-mentioned test transformer still has the following defects:

[0005] The above-mentioned test transformer adds a steel ring, an insulating sleeve, an HDPE sleeve, and a fiberglass sleeve to the sleeve body to form a sealed cavity, thereby substantially protecting the iron core in the terminal block. The design of the sealed cavity also has moisture-proof and flame-retardant effects. The steel ring and the wrapped insulating sleeve give it a certain mechanical strength and rigidity. However, the test transformer may be connected to the wrong port without paying attention during wiring. If the low-voltage input terminal is connected to the high voltage, the voltage output by the transformer may increase instantly, thereby burning the load equipment and damaging the transformer. Therefore, we need a test transformer that prevents miswiring to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to provide an anti-miswiring test transformer, which can monitor the wiring process in real time mainly through photoelectric sensors and controllers to ensure the correctness of the wiring. If the wiring is wrong, the controller will immediately issue an alarm and automatically record the error information to facilitate subsequent maintenance and inspection. The data storage device is stored in each storage slot of the controller. These data include the wire color information that each terminal should be connected to. During the wiring process, the controller will compare the actual wiring color with the data storage device in real time to ensure the correctness of the wiring.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an anti-miswiring test transformer, comprising a transformer body, an end cover is installed on the top of the transformer body, a plurality of mutually independent wiring terminals are provided on the upper surface of the end cover, a wiring nut is rotatably installed on the top of the wiring terminal, an independent identification plate is installed on each of the wiring terminals, an anti-miswiring device is provided on the identification plate, the anti-miswiring device comprises a photoelectric sensor and a controller, the photoelectric sensor is arranged inside the wiring terminal, one end of the controller is electrically connected to the photoelectric sensor, a plurality of storage slots are provided on the controller, each of the storage slots corresponds to each wiring terminal one by one, a data storage device is provided in each of the storage slots, and the data storage device is provided with information including the color of the wire to be connected to the wiring terminal.

[0008] Preferably, a display screen is installed on one side of the transformer body, and the controller is installed on the back of the display screen. Both the controller and the display screen are embedded in the transformer body.

[0009] Preferably, a high-voltage bushing is installed in the middle of the surface of the end cover, a short-circuit rod is sleeved on the top of the high-voltage bushing, the high-voltage bushing is connected to the interior of the transformer body, one end of the short-circuit rod is connected to a high-voltage silicon stack, and the high-voltage silicon stack is arranged inside the high-voltage bushing.

[0010] Preferably, a high-voltage output terminal is provided inside the high-voltage bushing, one end of the high-voltage output terminal passes through the top of the high-voltage bushing and extends out, the other end of the high-voltage output terminal is connected to a conductive sheet, and one end of the short-circuit rod passes through the high-voltage silicon stack and is connected to the conductive sheet.

[0011] Preferably, a voltage-equalizing ball is installed on the top of the high-voltage bushing, the high-voltage output terminal and the short-circuit rod both pass through the top of the voltage-equalizing ball, and the short-circuit rod is threadedly connected to the voltage-equalizing ball.

[0012] Preferably, an iron core is installed in the cavity of the transformer body, a low-voltage winding is wound on the outside of the iron core, a measuring winding is wrapped on the outside of the low-voltage winding, a high-voltage winding is wrapped on the outside of the low-voltage winding and the measuring winding, and the bottom end of the high-voltage output terminal is connected to the high-voltage winding through a wire.

[0013] Preferably, transformer handles are installed on both sides of the upper end of the end cover, the outer sides of the high-voltage winding, the low-voltage winding and the measuring winding are wrapped with insulating enamel layers, the cavity of the transformer body is filled with hydraulic oil, and the iron core is immersed in the hydraulic oil.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The utility model mainly uses photoelectric sensors and controllers to monitor the wiring process in real time to ensure the correctness of the wiring. If the wiring is wrong, the controller will immediately issue an alarm and automatically record the error information to facilitate subsequent maintenance and inspection. The data storage device is stored in each storage slot of the controller. These data include the wire color information that each terminal should be connected to. During the wiring process, the controller will compare the actual wiring color with the data storage device in real time to ensure the correctness of the wiring. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0017] Figure 2 It is a schematic cross-sectional view of the wiring terminal of the utility model;

[0018] Figure 3 This is a schematic diagram of the internal structure of the high-voltage bushing of the utility model;

[0019] Figure 4 It is a schematic diagram of the explosion structure of the iron core of the utility model;

[0020] Figure 5 It is a structural schematic diagram of the controller of the utility model.

[0021] In the figure: 1. Transformer body; 2. Terminal block; 3. Identification plate; 4. Photoelectric sensor; 5. Wiring nut; 6. High-voltage bushing; 61. High-voltage output terminal; 62. Short-circuit rod; 63. High-voltage silicon stack; 64. Conductive sheet; 65. Voltage equalizing ball; 7. Display screen; 8. Transformer handle; 9. End cover; 10. High-voltage winding; 11. Iron core; 12. Low-voltage winding; 13. Measuring winding; 14. Controller; 15. Storage slot; 16. Data storage device. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-5 The utility model provides a technical solution: an anti-miswiring test transformer, including a transformer body 1, an end cover 9 is installed on the top of the transformer body 1, a plurality of mutually independent wiring terminals 2 are arranged on the upper surface of the end cover 9, a wiring nut 5 is rotatably installed on the top of the wiring terminal 2, an independent identification plate 3 is installed on each wiring terminal 2, an anti-miswiring device is arranged on the identification plate 3, the anti-miswiring device includes a photoelectric sensor 4 and a controller 14, the photoelectric sensor 4 is arranged inside the wiring terminal 2, one end of the controller 14 is electrically connected to the photoelectric sensor 4, a plurality of storage slots 15 are provided on the controller 14, each storage slot 15 corresponds to each wiring terminal 2 one by one, each storage slot 15 is provided with a data storage device 16, and the data storage device 16 is provided with information including the color of the wire to be connected to the wiring terminal 2;

[0024] When in use, the wiring process can be monitored in real time through the photoelectric sensor 4 and the controller 14 to ensure the correctness of the wiring. If the wiring is wrong, the controller 14 will immediately issue an alarm and automatically record the error information to facilitate subsequent maintenance and inspection. The data storage device 16 is stored in each storage slot 15 of the controller 14. These data include the wire color information that each terminal 2 should be connected to. During the wiring process, the controller 14 will compare the actual wiring color with the data storage device 16 in real time to ensure the correctness of the wiring.

[0025] A display screen 7 is installed on one side of the transformer body 1, and a controller 14 is installed on the back of the display screen 7. Both the controller 14 and the display screen 7 are embedded in the transformer body 1. By being embedded in the transformer body 1, the controller 14 can be easily disassembled and installed when maintaining or repairing it.

[0026] A high-voltage bushing 6 is installed in the middle of the surface of the end cover 9, and a short-circuit rod 62 is sleeved on the top of the high-voltage bushing 6. The high-voltage bushing 6 is connected to the interior of the transformer body 1, and one end of the short-circuit rod 62 is connected to a high-voltage silicon stack 63. The high-voltage silicon stack 63 is arranged inside the high-voltage bushing 6. Installing the high-voltage silicon stack 63 inside the high-voltage bushing 6 can facilitate its maintenance and repair. When the high-voltage silicon stack 63 needs to be replaced or repaired, it is only necessary to open the high-voltage bushing 6 without disassembling the entire transformer, thereby reducing maintenance costs and time.

[0027] A high-voltage output terminal 61 is provided inside the high-voltage bushing 6. One end of the high-voltage output terminal 61 passes through the top of the high-voltage bushing 6 and extends out. The other end of the high-voltage output terminal 61 is connected to a conductive sheet 64. One end of a short-circuit rod 62 passes through a high-voltage silicon stack 63 and is connected to the conductive sheet 64. During the operation of the transformer, the current needs to flow from the high-voltage output terminal 61 through the conductive sheet 64 to the short-circuit rod 62. Connecting the short-circuit rod 62 to the conductive sheet 64 can optimize the current flow path, reduce resistance and energy loss, and improve the efficiency of the transformer.

[0028] A voltage-equalizing ball 65 is installed on the top of the high-voltage bushing 6. The high-voltage output terminal 61 and the short-circuit rod 62 both pass through the top of the voltage-equalizing ball 65, and the short-circuit rod 62 is threadedly connected to the voltage-equalizing ball 65. The voltage-equalizing ball 65 can improve the heat dissipation performance of the transformer. By optimizing the heat dissipation path, the large amount of heat generated by the high-voltage silicon stack 63 during operation can be better dissipated, thereby improving the thermal stability of the transformer.

[0029] An iron core 11 is installed in the cavity of the transformer body 1, and a low-voltage winding 12 is wound on the outside of the iron core 11. A measuring winding 13 is wrapped on the outside of the low-voltage winding 12. A high-voltage winding 10 is wrapped on the outside of the low-voltage winding 12 and the measuring winding 13. The bottom end of the high-voltage output terminal 61 is connected to the high-voltage winding 10 through a wire. The efficiency of the transformer can be improved by optimizing the current path and reducing the resistance. This design can minimize the loss of current during transmission, thereby improving the power conversion efficiency of the transformer.

[0030] Transformer handles 8 are installed on both sides of the upper end of the end cover 9. The outer sides of the high-voltage winding 10, the low-voltage winding 12 and the measuring winding 13 are all wrapped with insulating enamel. The cavity of the transformer body 1 is filled with hydraulic oil, and the iron core 11 is immersed in the hydraulic oil. The transformer handle 8 can be used to conveniently carry the transformer. The iron core 11 is immersed in the hydraulic oil, which can protect the iron core 11. At the same time, the performance of the transformer is improved. The outer sides of the high-voltage winding 10, the low-voltage winding 12 and the measuring winding 13 are all wrapped with insulating enamel, which can enhance the insulation between the three and avoid short circuit.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A transformer for preventing miswiring, comprising a transformer body (1), Features: An end cover (9) is installed on the top of the transformer body (1), and a plurality of mutually independent wiring terminals (2) are arranged on the upper surface of the end cover (9). A wiring nut (5) is rotatably installed on the top of the wiring terminal (2). An independent identification plate (3) is installed on each of the wiring terminals (2), and an anti-miswiring device is provided on the identification plate (3). The anti-miswiring device comprises a photoelectric sensor (4) and a controller (14). The photoelectric sensor (4) is arranged inside the wiring terminal (2), and one end of the controller (14) is electrically connected to the photoelectric sensor (4). The controller (14) is provided with a plurality of storage slots (15), and each storage slot (15) corresponds to each wiring terminal (2) one by one. A data storage device (16) is provided in each storage slot (15), and the data storage device (16) is provided with information including the color of the wire to be connected to the wiring terminal (2).

2. A miswiring-proof test transformer according to claim 1, Features: A display screen (7) is installed on one side of the transformer body (1), and the controller (14) is installed on the back of the display screen (7). Both the controller (14) and the display screen (7) are embedded in the transformer body (1).

3. A miswiring-proof test transformer according to claim 2, Features: A high-voltage bushing (6) is installed in the middle of the surface of the end cover (9); a short-circuit rod (62) is sleeved on the top of the high-voltage bushing (6); the high-voltage bushing (6) is connected to the inside of the transformer body (1); one end of the short-circuit rod (62) is connected to a high-voltage silicon stack (63); and the high-voltage silicon stack (63) is arranged inside the high-voltage bushing (6).

4. A miswiring-proof test transformer according to claim 3, Features: A high-voltage output terminal (61) is arranged inside the high-voltage bushing (6), one end of the high-voltage output terminal (61) passes through the top of the high-voltage bushing (6) and extends out, the other end of the high-voltage output terminal (61) is connected to a conductive sheet (64), and one end of the short-circuit rod (62) passes through the high-voltage silicon stack (63) and is connected to the conductive sheet (64).

5. A miswiring-proof test transformer according to claim 4, Features: A voltage-equalizing ball (65) is installed on the top of the high-voltage bushing (6), the high-voltage output terminal (61) and the short-circuit rod (62) both pass through the top of the voltage-equalizing ball (65), and the short-circuit rod (62) is threadedly connected to the voltage-equalizing ball (65).

6. A miswiring-proof test transformer according to claim 5, Features: An iron core (11) is installed in the cavity of the transformer body (1), a low-voltage winding (12) is wound around the outside of the iron core (11), a measuring winding (13) is wrapped around the outside of the low-voltage winding (12), a high-voltage winding (10) is wrapped around the outside of the low-voltage winding (12) and the measuring winding (13), and the bottom end of the high-voltage output terminal (61) is connected to the high-voltage winding (10) via a wire.

7. A miswiring-proof test transformer according to claim 6, Features: Transformer handles (8) are installed on both sides of the upper end of the end cover (9), the outer sides of the high-voltage winding (10), the low-voltage winding (12) and the measuring winding (13) are all wrapped with insulating enamel layers, the cavity of the transformer body (1) is filled with hydraulic oil, and the iron core (11) is immersed in the hydraulic oil.

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