Rapid wiring device for insulation resistance test of transformer of 110kV and above

Abstract

The invention relates to the technical field of transformer insulation resistance tests, in particular to a rapid wiring device for 110kV and above transformer insulation resistance tests, which comprises a wiring assembly, a box body and a sealing cover arranged on the side wall of the box body, the wiring socket is divided into high-voltage, medium-voltage and low-voltage wiring jacks which are used for connecting test wires of windings on each side of the transformer; the control assembly comprises a relay which is arranged at the top end of the box body through a partition plate, a control circuit module is installed at the top end of the relay, the relay is controlled through the control circuit module and used for rapidly switching all test loops, and the control assembly is connected with the intelligent display screen through an integrated connector socket and an intelligent display screen. And a tester can test on the ground without frequently and manually replacing a test wire, so that the time and the labor cost are greatly saved.

Description

Technical Field

[0001] The invention relates to the technical field of transformer insulation resistance testing, in particular to a quick wiring device for transformer insulation resistance testing of 110 kV and above. Background Art

[0002] In the power system, the transformer is an important voltage conversion device and one of the core equipment of the substation. The reliability of its insulation performance is directly related to the safe and stable operation of the power grid. In order to ensure the safety and stability of the transformer, according to the requirements of the "Power Equipment Maintenance Test Regulations", it is necessary to regularly test the insulation resistance, absorption ratio or polarization index of the transformer winding and bushing to check whether the insulation performance of the transformer body has decreased.

[0003] The traditional insulation resistance test method for 110kV and above transformers has the following shortcomings:

[0004] The operation is complicated: During the test, the insulation resistance tester needs to be brought to the main transformer. The tester needs to short-circuit the windings on each side and lead the test wire with alligator clips to the vicinity of the instrument, and use insulating materials to bind and fix it to make it suspended. In addition, the test wiring needs to be changed manually frequently, resulting in low test efficiency.

[0005] Safety issues: Since the test lines often need to be exposed, test personnel repeatedly climb up and down to connect the lines during operation and are prone to accidentally touch the exposed parts of the wiring and be harmed by induced electricity, which poses certain safety hazards.

[0006] Time-consuming: It usually takes 40 to 50 minutes or even longer to complete the insulation test items of all windings, which seriously affects work efficiency and increases workload. Summary of the invention

[0007] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0008] In view of the above-mentioned problem that test wiring needs to be frequently replaced manually, resulting in low test efficiency, the present invention is proposed.

[0009] Therefore, the object of the present invention is to provide a quick wiring device for insulation resistance testing of transformers of 110kV and above.

[0010] In order to solve the above technical problems, the present invention provides the following technical solutions: A quick wiring device for insulation resistance test of transformers of 110 kV and above, comprising: a wiring assembly, including a box body, a sealing cover arranged on the side wall of the box body, a wiring socket is installed on the top of the box body, and the wiring socket is divided into high-voltage, medium-voltage and low-voltage wiring jacks for connecting test wires of windings on each side of the transformer; and,

[0011] The control component includes a relay installed on the top of the box through a partition, a control circuit module is installed on the top of the relay, and the relay is controlled by the control circuit module to quickly switch various test circuits.

[0012] As a preferred solution of the 110kV and above transformer insulation resistance test quick wiring device described in the present invention, the wiring assembly also includes an intelligent display screen arranged on the side wall of the wiring socket, and the intelligent display screen is used to switch and display wiring combinations of different insulation test items.

[0013] As a preferred solution of the 110kV and above transformer insulation resistance test quick wiring device described in the present invention, the wiring assembly also includes a charging socket arranged at the bottom of the smart display screen, and a push-type switch is arranged on the side wall of the charging socket, and the push-type switch is used to control the overall power on and off of the device.

[0014] As a preferred solution of the 110kV and above transformer insulation resistance test quick wiring device described in the present invention, wherein: the wiring assembly also includes an external socket arranged at the bottom of the wiring socket, and the external socket includes "L", "G" and "E" which are respectively connected to the "L", "G" and "E" terminals of the insulation resistance tester. The entire test process only requires switching the wiring combination on the panel and the "test" button of the insulation resistance tester, so the test personnel will not touch the exposed part of the lead.

[0015] As a preferred solution of the 110kV and above transformer insulation resistance test quick wiring device described in the present invention, the control component also includes a mounting plate arranged between the relay and the control circuit module, a power module is installed on the side wall of the control circuit module, and the charging socket is used to charge the power module, wherein the power module is a lithium battery for providing additional power reserve for the device.

[0016] As a preferred solution of the 110kV and above transformer insulation resistance test quick wiring device described in the present invention, the control component also includes a bakelite partition arranged at the bottom end of the control circuit module, and the bakelite partitions are connected by insulating columns, and the insulating columns are used to fasten the control circuit module to the bottom of the mounting plate.

[0017] As a preferred solution of the 110kV and above transformer insulation resistance test quick wiring device described in the present invention, the bakelite partition is made of glass fiber cloth and epoxy resin material, and has good high temperature resistance, fire resistance and insulation performance; the relay is a high-voltage relay that can withstand high voltage above 10kV, ensuring the safety of the test process.

[0018] As a preferred solution of the 110kV and above transformer insulation resistance test quick wiring device of the present invention, wherein: the control circuit module adopts PLC programming and can manually switch various insulation test items according to preset test output requirements.

[0019] As a preferred solution of the 110kV and above transformer insulation resistance test quick wiring device described in the present invention, the insulating column is a threaded type, which is used to fasten the control circuit module to the bottom of the mounting plate to ensure the stability of the device.

[0020] As a preferred solution of the 110kV and above transformer insulation resistance test quick wiring device of the present invention, the wiring socket adopts an insulating banana socket, and the surface is treated with an insulating coating.

[0021] Beneficial effects of the present invention: Through the integrated wiring socket and intelligent display screen, the test personnel can conduct tests on the ground without frequent manual replacement of the test wiring, which greatly saves time and labor costs. The entire test process is shortened from the traditional 40 to 50 minutes to a few minutes. The device leads the test line to the ground and uses an insulating sheath for protection, which prevents the test personnel from touching the exposed part of the lead, eliminates the risk of electric shock caused by induced electricity, and improves the safety of the test process. Through the intelligent display screen and the control circuit module, the test personnel only need to switch the wiring combination on the panel to quickly switch different insulation test items, which simplifies the operation process and reduces the difficulty of operation. The device has a built-in lithium battery, which can provide a certain period of use without an external power supply, which is convenient for test personnel to test in various environments and enhances the portability and applicability of the device. High-quality materials such as high-voltage relays and bakelite partitions are used to ensure the stability and reliability of the device in a high-voltage environment and extend the service life of the device. The device can support a variety of insulation test items, including high-voltage windings to medium and low-voltage windings and ground, high-medium voltage windings to low-voltage windings and ground, iron cores to clamps and ground, etc., to meet different test requirements. The control circuit module programmed by PLC can automatically switch various insulation test items according to the preset test output requirements, realizing the automation and intelligence of the test process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without any creative labor.

[0023] Figure 1 This is the overall schematic diagram of the quick wiring device for insulation resistance testing of transformers of 110kV and above.

[0024] Figure 2 This is a cross-sectional view of the overall structure of the quick wiring device for insulation resistance testing of transformers of 110kV and above.

[0025] Figure 3 This is a schematic diagram of the box cross-section structure of the quick wiring device for insulation resistance testing of 110kV and above transformers.

[0026] Reference numerals:

[0027] 100, wiring assembly; 101, box; 102, wiring socket; 103, smart display; 104, charging socket; 105, push switch; 106, external socket; 107, sealing cover;

[0028] 200, control component; 201, partition; 202, relay; 203, control circuit module; 204, mounting plate; 205, power module; 206, bakelite partition; 207, insulating column. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0030] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0032] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0033] Example 1, reference Figure 1 , which is the first embodiment of the present invention, provides a 110kV and above transformer insulation resistance test quick wiring device, including, through the wiring assembly, not only the efficiency and safety of the transformer insulation resistance test are improved, but also the reliability and portability of the system are enhanced, and it is suitable for power transformer testing tasks in various complex environments.

[0034] Specifically, the wiring assembly 100 includes a box body 101, a sealing cover 107 arranged on the side wall of the box body 101, and a wiring socket 102 is installed on the top of the box body 101. The wiring socket 102 is divided into high-voltage, medium-voltage and low-voltage wiring jacks for connecting test wires of windings on each side of the transformer.

[0035] Furthermore, the wiring assembly 100 also includes an intelligent display screen 103 arranged on the side wall of the wiring socket 102, and the intelligent display screen 103 is used to switch and display wiring combinations of different insulation test items.

[0036] Furthermore, the wiring assembly 100 also includes a charging socket 104 arranged at the bottom of the smart display screen 103, and a push switch 105 is arranged on the side wall of the charging socket 104, and the push switch 105 is used to control the overall power on and off of the device.

[0037] Furthermore, the wiring assembly 100 also includes an external socket 106 arranged at the bottom of the wiring socket 102, and the external socket 106 includes "L", "G" and "E" which are respectively connected to the "L", "G" and "E" terminals of the insulation resistance tester. The entire test process only requires switching the wiring combination on the panel and the "test" button of the insulation resistance tester, so the test personnel will not touch the exposed part of the lead.

[0038] Operation process: The tester first needs to climb up the transformer and short-circuit the windings on each side of the main transformer. Use a test line with an insulating sheath to lead the short-circuited windings down to the ground, and connect them to the "high voltage", "medium voltage" and "low voltage" wiring sockets of the wiring socket 102 on the box 101 respectively. Connect the insulation resistance tester: Connect the "L", "G", and "E" ports on the external socket 106 to the "L", "G", and "E" terminals of the insulation resistance tester respectively. Turn on the power: Press the push switch 105 to turn on the power of the entire device. Select the insulation test item to be performed through the smart display 103. The smart display 103 will display the currently selected test item and its wiring combination. After selecting the test item, press the "test" button on the insulation resistance tester to start the test. During the test, the tester monitors the test progress and results through the smart display 103 to ensure that the test is carried out smoothly. The smart display 103 will display the insulation resistance value and other related data in real time. After the test is completed, read and record the insulation resistance value and other related data from the smart display 103. First disconnect the insulation resistance tester, then press the push switch 105 to turn off the power supply to ensure the safe shutdown of the entire system.

[0039] Example 2, reference Figure 2-3 , which is the second embodiment of the present invention, and this embodiment is different from the first embodiment in that: the control component 200 includes a relay 202 arranged at the top of the box 101, and the relay 202 is installed in the box 101 through the partition 201. A control circuit module 203 is installed on the top of the relay 202, and the relay 202 is controlled by the control circuit module 203 to quickly switch various test circuits. This design allows the tester to select different test items through the intelligent display screen 103, and the control circuit module 203 will automatically control the relay 202 to switch the corresponding test circuit, thereby achieving efficient and accurate testing.

[0040] Specifically, the control component 200 includes a relay 202 installed on the top of the box 101 through the partition 201, a control circuit module 203 is installed on the top of the relay 202, and the relay 202 is controlled by the control circuit module 203 for fast switching of various test circuits.

[0041] Furthermore, the control component 200 also includes a mounting plate 204 arranged between the relay 202 and the control circuit module 203, and a power module 205 is installed on the side wall of the control circuit module 203. The charging socket 104 is used to charge the power module 205, wherein the power module 205 is a lithium battery for providing additional power reserves for the device. The power module 205 is a lithium battery and can provide additional power reserves for the device without an external power supply, thereby increasing the portability and practicality of the system.

[0042] Furthermore, the control assembly 200 also includes a bakelite partition 206 disposed at the bottom of the control circuit module 203, and the bakelite partitions 206 are connected by insulating columns 207, and the insulating columns 207 are used to fasten the control circuit module 203 to the bottom of the mounting plate 204. The bakelite partition 206 is made of glass fiber cloth and epoxy resin material, and has good high temperature resistance, fire resistance and insulation performance, and can effectively isolate the high-voltage test circuit from the control circuit to ensure the safety of the test process. The insulating column 207 is a threaded type, and is used to fasten the control circuit module 203 to the bottom of the mounting plate 204 to ensure the stability and reliability of the device.

[0043] The rest of the structure is the same as that of Example 1.

[0044] Operation process: The tester first needs to climb up the transformer and short-circuit the windings on each side of the main transformer. Use a test line with an insulating sheath to lead the short-circuited winding down to the ground, and connect them to the "high voltage", "medium voltage" and "low voltage" wiring sockets of the wiring socket 102 on the box 101 respectively. Connect the "L", "G" and "E" ports on the external socket 106 to the "L", "G" and "E" terminals of the insulation resistance tester respectively, and press the push switch 105 to turn on the power of the entire device. Select the insulation test items to be performed through the smart display 103. After selecting the test items, press the "Test" button on the insulation resistance tester to start the test. During the test, the control circuit module 203 will automatically control the relay 202 to switch each test circuit according to the preset test output requirements. The tester monitors the test progress and results through the smart display 103 to ensure that the test proceeds smoothly. After the test is completed, read and record the insulation resistance value and other relevant data from the smart display 103. First disconnect the insulation resistance tester, then press the push switch 105 to turn off the power supply to ensure the safe shutdown of the entire system.

[0045] Example 3, reference Figure 1 to Figure 3 , which is the third embodiment of the present invention. This embodiment is different from the above embodiments in that the use of high-performance materials not only improves the efficiency and safety of transformer insulation resistance testing, but also enhances the reliability and stability of the system, and is suitable for power transformer testing tasks in various complex environments.

[0046] Specifically, the bakelite partition 206 is made of glass fiber cloth and epoxy resin material, and has good high temperature resistance, fire resistance and insulation performance. The relay 202 is a high-voltage relay that can withstand high voltages above 10kV, ensuring the safety of the test process.

[0047] Furthermore, the control circuit module 203 adopts PLC programming, and can manually switch various insulation test items according to preset test output requirements. The control circuit module 203 adopts PLC programming, and can manually switch various insulation test items according to preset test output requirements. Through the intelligent display screen 103, the tester can select different test items, and the control circuit module 203 programmed by PLC will automatically control the relay 202 to switch the corresponding test circuit to achieve fast and accurate testing.

[0048] Furthermore, the insulating column 207 is a threaded type, which is used to fasten the control circuit module 203 to the bottom of the mounting plate 204 to ensure the stability and reliability of the device. The threaded design facilitates installation and disassembly while providing good mechanical strength.

[0049] Furthermore, the wiring socket 102 adopts an insulated banana socket, and the surface is treated with an insulating coating to ensure safety and reliability when used in a high voltage environment. The design of the insulated banana socket makes the connection of the test line more convenient and firm, and reduces the risk of poor contact.

[0050] The rest of the structure is the same as that of Example 2.

[0051] Operation process: First, you need to manually climb onto the transformer, use the test line to short-circuit the windings on each side of the main transformer, and then use the test line protected by the insulating sheath to lead down to the ground and connect to the "high voltage", "medium voltage" and "low voltage" wiring jacks 102 of the device respectively, where the test line at the end of the insulating protective sheath is a banana plug, and then the "L", "G" and "E" on the external socket 106 are respectively connected to the "L", "G" and "E" terminals of the insulation resistance tester. The entire test only requires switching the wiring combination on the intelligent display screen 103 and the "test" button of the insulation resistance tester, so the tester will not touch the exposed part of the lead wire, and ensure that the test starts after the wiring is completed. Press the push switch 105 to turn on the power of the entire device, and select the insulation test items to be performed through the intelligent display screen 103, so that the device does not need to climb onto the transformer many times to replace the test line and test circuit, which improves the test efficiency and safety. And the control circuit module 203 programmed by PLC controls the relay 202 to execute, so that each test circuit can be quickly switched, and then the "test" button is pressed on the insulation resistance tester to start the test. During the test, the tester should not directly touch any exposed part of the lead. Use the smart display 103 to monitor the test progress and results. Record data: After the test is completed, read and record the insulation resistance value and other relevant data from the smart display 103. After the test is completed, first disconnect the insulation resistance tester, and then press the push switch 105 to turn off the power. The power module 205 can provide additional power reserves for the instrument, which can provide a certain period of use without an external power supply, so that the tester can better test.

[0052] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. 110kV and above transformer insulation resistance test quick wiring device, characterized by: include, A wiring assembly (100) comprises a box (101), a sealing cover (107) arranged on a side wall of the box (101), a wiring socket (102) being installed at the top of the box (101), the wiring socket (102) being divided into high-voltage, medium-voltage and low-voltage wiring jacks for connecting test wires of windings on each side of a transformer; and, The control component (200) comprises a relay (202) installed on the top of the box (101) through a partition (201), a control circuit module (203) installed on the top of the relay (202), and the relay (202) is controlled by the control circuit module (203) to quickly switch various test circuits.

2. The 110kV and above transformer insulation resistance test quick wiring device as claimed in claim 1, characterized in that: The wiring assembly (100) further comprises an intelligent display screen (103) arranged on a side wall of the wiring socket (102), wherein the intelligent display screen (103) is used to switch and display wiring combinations of different insulation test items.

3. The 110kV and above transformer insulation resistance test quick wiring device as claimed in claim 2, characterized in that: The wiring assembly (100) further comprises a charging socket (104) arranged at the bottom end of the smart display screen (103), and a push switch (105) is arranged on the side wall of the charging socket (104), and the push switch (105) is used to control the overall power supply of the device to be turned on and off.

4. The 110kV and above transformer insulation resistance test quick wiring device as claimed in claim 3, characterized in that: The wiring assembly (100) further comprises an external socket (106) arranged at the bottom end of the wiring socket (102); the external socket (106) comprises "L", "G", and "E" terminals respectively connected to the "L", "G", and "E" terminals of the insulation resistance tester; the entire test process only requires switching the wiring combination on the panel and the "test" button of the insulation resistance tester, so the test personnel will not touch the exposed part of the lead wire.

5. The 110kV and above transformer insulation resistance test quick wiring device as claimed in claim 4, characterized in that: The control assembly (200) further comprises a mounting plate (204) arranged between the relay (202) and the control circuit module (203); a power module (205) is mounted on a side wall of the control circuit module (203); the charging socket (104) is used to charge the power module (205); wherein the power module (205) is a lithium battery used to provide additional power reserve for the device.

6. The 110kV and above transformer insulation resistance test quick wiring device as claimed in claim 5, characterized in that: The control assembly (200) further comprises a bakelite partition (206) arranged at the bottom end of the control circuit module (203), the bakelite partitions (206) being connected to each other via insulating columns (207), and the insulating columns (207) are used to fasten the control circuit module (203) to the bottom of the mounting plate (204).

7. The 110kV and above transformer insulation resistance test quick wiring device as claimed in claim 6, characterized in that: The bakelite partition (206) is made of glass fiber cloth and epoxy resin material, and has good high temperature resistance, fire resistance and insulation performance. The relay (202) is a high voltage relay capable of withstanding high voltages above 10 kV, thereby ensuring the safety of the test process.

8. The 110kV and above transformer insulation resistance test quick wiring device as claimed in claim 7, characterized in that: The control circuit module (203) adopts PLC programming and can manually switch various insulation test items according to preset test output requirements.

9. The 110kV and above transformer insulation resistance test quick wiring device as claimed in claim 8, characterized in that: The insulating column (207) is of a threaded type and is used to fasten the control circuit module (203) to the bottom of the mounting plate (204) to ensure the stability of the device.

10. The 110kV and above transformer insulation resistance test quick wiring device as claimed in claim 9, characterized in that: The wiring socket (102) is an insulated banana socket, and the surface is treated with an insulating coating.

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