Transformer safety test automatic switching device

Abstract

The utility model provides an automatic switching device for a safety test of a transformer, which is additionally provided with an automatic switching device outside a traditional safety tester. The first test line, the second test line, the third test line, the fourth test line and the fifth test line are used for being correspondingly and electrically connected with the two ends of an output end winding of a transformer to be tested, the two ends of an input end winding of the transformer and a transformer shell respectively, and the first high-voltage access line and the second high-voltage access line are electrically connected with two high-voltage probes of an external safety tester respectively. And then a test signal is transmitted to the control panel through the communication line to control the change-over switch to switch on different test objects, so that four steps (input-to-output, input-to-shell, output-to-shell and single winding insulation test) required by the traditional test can be completed through one-time wiring, and an operator only needs to complete one-time wiring operation before the test is started. Manual intervention and operation complexity are greatly reduced, and the risk of human errors possibly caused by frequent wiring operation is reduced.

Description

Technical Field

[0001] This utility model relates to the field of transformer testing technology, and in particular to an automatic switching device for transformer safety testing. Background Technology

[0002] To ensure the safe and stable operation of transformers and prevent serious electrical accidents caused by insulation problems, withstand voltage testing is an essential inspection step. Through withstand voltage testing, it is possible to promptly determine whether the transformer's insulation meets the corresponding safety requirements, thereby ensuring the safe and reliable operation of the entire power system and related equipment.

[0003] Traditional testing methods involve a step-by-step process, requiring four independent withstand voltage tests. Furthermore, wiring must be changed before each test, making the entire testing procedure extremely complex and cumbersome. Secondly, the need for multiple manual wiring changes leads to excessively long testing times, severely impacting production efficiency. More importantly, this traditional testing method is prone to missed or incorrect tests. Such omissions or errors could result in products with poor insulation withstand voltage entering the market or subsequent use, posing significant safety hazards and economic losses to related equipment, systems, and even the entire power grid. Therefore, further improvements are needed. Utility Model Content

[0004] In view of this, the present invention provides an automatic switching device for transformer safety testing. In response to the problems of the prior art, an external automatic switching device is designed to solve the existing technical problems.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] An automatic switching device for transformer safety testing, comprising:

[0007] The outer casing has a hollow center forming a component receiving cavity, and multiple wiring holes are provided on both sides of the outer casing for wiring;

[0008] The faceplate is fixedly mounted on the opening on the upper side of the outer shell and closes the outer shell;

[0009] There are six toggle switches, which are mounted on the bottom of the housing via a mounting plate.

[0010] A control board is located at the bottom of the housing. The control board is electrically connected to six switching switches via wires and is used to control the switching switches.

[0011] The communication cable passes through the wiring hole on the left side of the housing and extends into the housing to electrically connect with the control board, which is used for the control board to communicate with external safety testing instruments.

[0012] The power cord passes through the wiring hole on the left side of the casing and extends into the casing to connect with the control board for power supply.

[0013] High voltage access line one, which passes through the wiring hole on the left side of the housing and extends into the housing, is electrically connected to test line one and test line two, which pass through the wiring hole on the right side, respectively, via two switch switches on the upper side;

[0014] High-voltage access line 2 extends into the housing through the wiring hole on the left side and connects to test line 2, test line 3, test line 4, and test line 5, which pass through the wiring hole on the right side, respectively, via four switching switches on the lower side.

[0015] Test line 1, test line 2, test line 3, test line 4, and test line 5 are used to electrically connect to the two ends of the output winding of the transformer under test, the two ends of the input winding of the transformer, and the transformer casing, respectively. High voltage access line 1 and high voltage access line 2 are electrically connected to the two high voltage probes of the external safety tester, respectively.

[0016] Furthermore, an indicator light assembly is also provided on the side wall of the housing. The indicator light assembly is electrically connected to the control board via wires and is used to display test results.

[0017] Furthermore, a display screen assembly is also provided on the side wall of the housing. The display screen assembly is electrically connected to the control board via wires and is used to display test information.

[0018] Furthermore, the switching switch is an electromagnetic relay switch.

[0019] The beneficial effects of this utility model are as follows:

[0020] This invention adds an automatic switching device to the traditional safety testing instrument. Test leads 1, 2, 3, 4, and 5 are used to electrically connect to the two ends of the output winding, the two ends of the input winding, and the transformer casing of the transformer under test, respectively. High-voltage access lines 1 and 2 are electrically connected to the two high-voltage probes of the external safety testing instrument. The test signal is then transmitted to the control board via a communication line to control the switching switch to connect different test objects. This allows the four steps required for traditional testing (input to output, input to casing, output to casing, and single winding insulation test) to be completed with a single wiring operation. The operator only needs to complete the wiring operation once before starting the test, greatly reducing manual intervention and operational complexity, making the entire testing process simpler and more efficient. This not only saves a lot of manpower and time costs, but also reduces the risk of human error that may be introduced by frequent wiring operations. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the automatic switching device for transformer safety testing in this utility model;

[0022] Figure 2 This is a schematic diagram showing the disassembled automatic switching device for transformer safety testing in this utility model.

[0023] The annotations in the attached figures are explained as follows:

[0024] 10 is the outer casing, 11 is the component housing cavity, 12 is the wiring hole, 20 is the front cover, and 30 is the switch.

[0025] 40 is the mounting plate, 50 is the control board, 60 is the communication cable, 70 is the power cable, and 80 is the high-voltage access cable.

[0026] 90 is test line 1, 100 is test line 2, 110 is high voltage access line 2, 120 is test line 3, 130 is test line 4, 140 is test line 5, 150 is indicator light assembly, and 160 is display screen assembly. Detailed Implementation

[0027] The embodiments of this disclosure will now be described in detail with reference to the accompanying drawings.

[0028] The following specific examples illustrate the implementation of this disclosure. Those skilled in the art can easily understand other advantages and effects of this disclosure from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. This disclosure can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this disclosure. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0029] To enable transformer testing to be completed with only one wiring connection, the specific details of this utility model are as follows.

[0030] Combination Figure 1 and Figure 2 As shown, an embodiment of this utility model is an automatic switching device for transformer safety testing. Importantly, it includes:

[0031] The outer casing 10 has a hollow center forming a component receiving cavity 11, and multiple wiring holes 12 are provided on both sides of the outer casing 10 for wiring.

[0032] The faceplate 20 is fixedly mounted on the upper opening of the outer shell 10 and closes the outer shell 10;

[0033] There are six toggle switches 30, which are mounted on the bottom of the housing 10 via mounting plate 40.

[0034] The control board 50 is located at the bottom of the housing 10. The control board 50 is electrically connected to six switch 30s via wires and is used to control the switch 30s.

[0035] The communication line 60 passes through the wiring hole 12 on the left side of the housing 10 and extends into the housing 10 to be electrically connected to the control board 50, which is used for the control board 50 to communicate with the external safety tester.

[0036] The power cord 70 passes through the wiring hole 12 on the left side of the housing 10 and extends into the housing 10 to be electrically connected to the control board 50 for power supply.

[0037] High voltage access line 80 passes through the wiring hole 12 on the left side of the housing 10 and extends into the housing 10. It is electrically connected to test line 90 and test line 100 passing through the wiring hole 12 on the right side through the two switching switches 30 on the upper side, respectively.

[0038] High voltage access line 2 110 passes through the wiring hole 12 on the left side of the housing 10 and extends into the housing 10. It is connected to test line 2 100, test line 3 120, test line 4 130 and test line 5 140 passing through the wiring hole 12 on the right side through the four switching switches 30 on the lower side.

[0039] Test leads 1 (90), 2 (100), 3 (120), 4 (130), and 5 (140) are used to electrically connect to the two ends of the output winding, the two ends of the input winding, and the transformer casing of the transformer under test, respectively. High-voltage access leads 1 (80) and 2 (110) are used to electrically connect to the two high-voltage probes of the external safety testing instrument. The typical wiring method is as follows: test leads 1 (90) and 3 (120) are electrically connected to the two ends of the input winding of the transformer; test leads 2 (100) and 4 (130) are used to electrically connect to the two ends of the output winding of the transformer, respectively; and test lead 5 (140) is used to electrically connect to the transformer casing.

[0040] The main feature of this invention is the addition of an automatic switching device to the traditional safety testing instrument. Test leads 1 (90), 2 (100), 3 (120), 4 (130), and 5 (140) are used to electrically connect to the two ends of the output winding, the two ends of the input winding, and the transformer casing of the transformer under test, respectively. High-voltage access lines 1 (80) and 2 (110) are electrically connected to the two high-voltage probes of the external safety testing instrument. The test signal is then transmitted to the control board 50 via the communication line 60 to control the switching switch 30 to switch between different test objects. This allows the four steps required for traditional testing (input to output, input to casing, output to casing, and single winding insulation test) to be completed with a single wiring operation. Operators only need to complete the wiring operation once before starting the test, greatly reducing manual intervention and operational complexity, making the entire testing process simpler and more efficient. This not only saves a lot of manpower and time costs but also reduces the risk of human error that may be introduced due to frequent wiring operations.

[0041] Furthermore, in some embodiments, such as Figure 1 , Figure 2 As shown, in order to better display the abnormal data detected during testing, an indicator light assembly 150 is also provided on the side wall of the housing 10. The indicator light assembly 150 is electrically connected to the control board 50 through wires and is used to illuminate and display the test results, so that testers can promptly detect abnormal test results.

[0042] Furthermore, in some embodiments, such as Figure 1 , Figure 2 As shown, in order to facilitate the observation of test information by testers, a display screen assembly 160 is also provided on the side wall of the housing 10. The display screen assembly 160 is electrically connected to the control board 50 through wires to display test information for easy viewing.

[0043] Furthermore, in some embodiments, to make the automatic switching more sensitive, the switch 30 is an electromagnetic relay switch, which provides a more accurate and sensitive response to the control board 50. Of course, other types of adaptable, automatically controllable switching components can also be used.

[0044] The above description is merely illustrative of the embodiments of this utility model and is not intended to limit the scope of this utility model. For those skilled in the art, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model without creative labor should be included within the protection scope of this utility model.

Claims

1. A transformer safety test automatic switching device, characterized by, It includes: The shell (10), wherein the middle hollow forming part contains the cavity (11), the shell (10) is provided with a plurality of wiring holes (12) on both sides for wiring; The face shell (20) is fixedly arranged on the upper opening of the shell (10) and closes the shell (10); The switch (30) is six in number, which is arranged at the bottom of the shell (10) through the mounting plate (40); The control panel (50) is arranged at the bottom of the shell (10), and the control panel (50) is electrically connected with the six switch (30) respectively through the wire for controlling the switch (30); The communication line (60) is inserted into the shell (10) through the left wiring hole (12) of the shell (10) and is electrically connected with the control panel (50) for connecting communication between the control panel (50) and the external safety testing instrument; The power line (70) is inserted into the shell (10) through the left wiring hole (12) of the shell (10) and is electrically connected with the control panel (50) for power supply; The high voltage access line one (80) is inserted into the shell (10) through the left wiring hole (12) of the shell (10) and is electrically connected with the test line one (90), the test line two (100) through the right wiring hole (12) respectively through the upper two switch (30); The high voltage access line two (110) is inserted into the shell (10) through the left wiring hole (12) of the shell (10) and is electrically connected with the test line two (100), the test line three (120), the test line four (130), the test line five (140) through the right wiring hole (12) respectively through the lower four switch (30); The test line one (90), the test line two (100), the test line three (120), the test line four (130), the test line five (140) are used for corresponding electrical connection with the two ends of the output end winding of the transformer to be tested, the two ends of the input end winding of the transformer, the shell of the transformer, the high voltage access line one (80), the high voltage access line two (110) are electrically connected with the two high voltage probes of the external safety testing instrument respectively.

2. The transformer safety testing automatic switching apparatus of claim 1, wherein: The shell (10) is further provided with an indicating lamp assembly (150) on the side wall, which is electrically connected with the control panel (50) through the wire for prompting the display of test results.

3. The transformer safety testing automatic switching apparatus of claim 1, wherein: The shell (10) is further provided with a display screen assembly (160) on the side wall, which is electrically connected with the control panel (50) through the wire for displaying test information.

4. The transformer safety testing automatic switching apparatus of claim 1, wherein: The switch (30) is an electromagnetic relay switch.

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