Auxiliary wiring device and method for transformer test

Abstract

The invention relates to the technical field of power equipment, and particularly discloses an auxiliary wiring device and method for a transformer test. The device comprises a sleeve fixing unit, a grounding module, a connecting piece and a short-circuit interface, the sleeve fixing unit comprises a straight rod and a hook fixedly connected to one end of the straight rod. The grounding module selectively anchors the bushing voltage of the same voltage grade side of the transformer to be tested as ground potential; the short-circuit interface is electrically connected with the grounding module, the test terminal is used for electrically connecting a transformer terminal on a to-be-tested transformer, the connection terminal is used for electrically connecting the short-circuit interface, and all the resistance test wires are electrically connected with one another through the short-circuit interface; the connecting piece is connected with the other end of the straight rod and the short-circuit interface, a fixing buckle is arranged on the connecting piece, and the wire harness bundle is detachably installed on the fixing buckle. The device is used for guiding a resistance test wire, prevents the resistance test wire from touching the ground and a porcelain bottle outside a sleeve, and can realize ground insulation of the resistance test wire; therefore, short circuit, grounding and other operations are carried out, test items of the to-be-tested transformer are measured, and the field work efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power equipment, and in particular to a transformer test auxiliary wiring device and method. Background Art

[0002] The transformer is one of the most important electrical equipment in the entire power system. It can not only increase the voltage to send electricity to the power consumption area, but also reduce the voltage to various levels of use voltage to meet the power demand. With the continuous growth of power supply load and the continuous improvement of transformer manufacturing technology, in order to obtain better power transmission capacity, the diameter of the transformer conductive rod is becoming larger and larger. In order for the transformer to operate safely and stably, maintenance personnel need to carry out DC resistance, bushing test, short-circuit impedance and power outage routine tests on a regular basis to determine whether the transformer is in good operating condition.

[0003] In the preventive test of transformers, especially the conventional high-voltage test of 220kV transformers, the test time is about three hours, and the test process requires a lot of time to change the test wiring. The conventional high-voltage test items of 220kV transformers mainly include three items: insulation resistance test, bushing dielectric loss and capacitance test, and DC resistance test. Among them, the insulation resistance test, bushing dielectric loss and capacitance test wiring require the high-voltage A, B, C, O four-phase bushing to be short-circuited. There are two state switching operations during the test: grounding and ungrounding. When ungrounded, the overall insulation to the ground must be maintained, and the ground and the porcelain bottle outside the bushing should not be touched. For the DC resistance test, the high-voltage A, B, C, O four-phase bushings need to be led down to the DC resistance tester with test wires for relevant tests.

[0004] Due to the high height of the 220kV transformer bushing, there is a risk of falling from a height during the conversion test wiring process. Because it takes a long time, the number of height operations should be reduced as much as possible. The test personnel use the DC resistance test line to lead down the four-phase bushings of A, B, C, and O, short-circuit them, and then hang them up with insulating ropes to maintain insulation to the ground to complete the insulation resistance test, bushing dielectric loss and capacitance test. Then, the DC resistance test line is led down to the DC resistance tester to complete the DC resistance test. The above method can reduce the number of height conversion wiring and improve on-site work efficiency, but there are problems such as poor insulation and unreliable fixation of the insulating rope, which directly affect the test results. If the test wiring needs to be changed again, the test time will be further extended. Summary of the invention

[0005] The purpose of the present invention is to provide a transformer test auxiliary wiring device and method to achieve accurate measurement of transformer test items and improve on-site work efficiency.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A transformer test auxiliary wiring device is used to cooperate with multiple resistance test lines to test the transformer to be tested. The resistance test line includes a wire harness bundle and a test terminal and a connection terminal connected to the wire harness bundle. The transformer test auxiliary wiring device includes a bushing fixing unit, a grounding module, a connector and a short-circuit interface; the bushing fixing unit includes a straight rod and a hook, and the hook is fixed to one end of the straight rod; the grounding module can selectively anchor the bushing voltage on the same voltage level side of the transformer to be tested to the ground potential; the short-circuit interface is electrically connected to the grounding module, the test terminal is used to electrically connect the transformer terminal on the transformer to be tested, the connection terminal is used to electrically connect the short-circuit interface, and all the resistance test lines are electrically connected to each other through the short-circuit interface; the connector connects the other end of the straight rod and the short-circuit interface, and a fixing buckle is provided on the connector, and the wire harness bundle can be detachably installed on the fixing buckle.

[0008] As an optional technical solution for the transformer test auxiliary wiring device, the grounding module includes a grounding cable and a grounding clamp, the short-circuit interface is electrically connected to the grounding clamp through the grounding cable, and the grounding clamp is used to guide static electricity to the ground for discharge; the connecting terminal is detachably connected to the short-circuit interface, and the connecting piece is connected to the connecting terminal.

[0009] As an optional technical solution for the transformer test auxiliary wiring device, the grounding module further includes a receiver, the grounding cable passes through the receiver, and the receiver is used to reel in or unreel the grounding cable.

[0010] As an optional technical solution for the transformer test auxiliary wiring device, the bushing fixing unit is provided with a receiving hole, the wiring harness is connected to the test terminal through a test cable, and the test cable passes through the receiving hole.

[0011] As an optional technical solution for the transformer test auxiliary wiring device, a guide hole is provided on the bushing fixing unit; the accommodating hole extends along the length direction of the straight rod, and a first opening is provided at one end of the accommodating hole away from the bent hook, and an end of the accommodating hole close to the bent hook is connected to one end of the guide hole, and a second opening is provided at the other end of the guide hole, and the test cable enters from the first opening and exits from the second opening.

[0012] As an optional technical solution for the transformer test auxiliary wiring device, the connecting piece is a flexible wire, the fixing buckle and the flexible wire form a positioning ring, and the wire bundle is overlapped on the positioning ring.

[0013] As an optional technical solution for the transformer test auxiliary wiring device, the resistance test line also includes a binding piece, and the binding piece is used to bind the wire bundle.

[0014] As an optional technical solution for the transformer test auxiliary wiring device, the bushing fixing unit is integrally formed.

[0015] As an optional technical solution for the transformer test auxiliary wiring device, the bushing fixing unit is made of insulating material or metal material.

[0016] The transformer test auxiliary wiring method is applied to the above transformer test auxiliary wiring device, comprising the following steps:

[0017] S10: installing the wire harness bundle on the fixing buckle, and connecting the connecting end to the short-circuit interface;

[0018] S20: Hooking the hook onto the transformer end;

[0019] S30: Determine whether the transformer to be tested needs to be insulated from the ground. If so, connect the test terminal to the transformer terminal to insulate the transformer to the ground, and then proceed to S40. If not, directly proceed to S40.

[0020] S40: After the test is completed, the test terminal is removed from the transformer terminal, the hook is removed from the transformer to be tested, the connection terminal is removed from the short-circuit interface, and finally the wire harness is taken out from the fixing buckle.

[0021] Beneficial effects of the present invention:

[0022] The transformer test auxiliary wiring device uses the bushing fixing unit to achieve connection and fixation with the transformer end, and can collect and fix at least one resistance test line; the short-circuit interface can be used to achieve the operation of short-circuiting between the resistance test lines. Combined with the design of the short-circuit interface electrically connecting the grounding module and the grounding module selectively connecting to the ground, the grounding of the resistance test line can be achieved, so that static electricity can be quickly guided to the ground for discharge, ensuring the stability of the ground potential during the test. At the same time, the detachable design of the connection terminal makes the operation easier and enhances the overall flexibility. The design of the hook on the bushing fixing unit is convenient for fixing the transformer end; combined with the setting of the fixing buckle, the purpose of positioning the resistance test line is achieved, thereby realizing the guidance of the layout position of the resistance test line, facilitating the installation and fixation of the resistance test line, and improving the convenience and safety of the test as a whole. The transformer test auxiliary wiring device guides the layout position of the resistance test line, hangs and fixes the resistance test line and short-circuits the ground, avoiding the situation where the resistance test line touches the ground and the porcelain bottle outside the bushing, so that the resistance test line can be selectively insulated from the ground; on the premise of ensuring the stable operation of the resistance test line, short-circuiting and grounding operations can be performed. The above improvements reduce the risk of testers climbing when changing test wiring, help to achieve accurate measurement of the test items of the transformer under test, improve on-site work efficiency, and achieve safe and efficient testing of the transformer under test. At the same time, the bushing voltage on the same voltage level side of the transformer under test is stably anchored to the ground potential, which improves the accuracy and safety of the test.

[0023] The transformer test auxiliary wiring method can conveniently and quickly connect and fix the resistance test line, so as to accurately test the various indicators of the transformer to be tested, and provide a reliable basis for the quality assessment of the transformer to be tested. The method is simple to operate and has clear steps, which can ensure that the line connection and removal during the test are accurate, ensure the accuracy and safety of the test, improve the efficiency of the test, and help to ensure the safety of the tester. Moreover, the above method also fully considers the safety of the tester and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a structural schematic diagram of a transformer test auxiliary wiring device provided in Embodiment 1 of the present invention;

[0025] Figure 2 It is a schematic diagram of the structure of the transformer test auxiliary wiring device and the transformer to be tested provided in the first embodiment of the present invention;

[0026] Figure 3 is a flow chart of a transformer test auxiliary wiring method provided in Embodiment 1 of the present invention;

[0027] Figure 4is a schematic diagram of the structure of a transformer test auxiliary wiring device provided in Embodiment 2 of the present invention;

[0028] Figure 5 It is a structural schematic diagram of a transformer test auxiliary wiring device and a transformer to be tested provided in Embodiment 2 of the present invention;

[0029] Figure 6 It is a flow chart of the transformer test auxiliary wiring method provided in the second embodiment of the present invention.

[0030] In the figure:

[0031] 100, sleeve fixing unit; 110, hook; 120, straight rod; 121, first opening; 122, second opening;

[0032] 200, connector;

[0033] 300, fixing buckle;

[0034] 400, short-circuit interface;

[0035] 500, storage device;

[0036] 600, grounding wire clamp;

[0037] 700, transformer to be tested; 710, transformer bushing; 720, transformer terminal; 730, porcelain bottle outside the bushing;

[0038] 800, resistance test line; 810, test terminal; 820, wire bundle; 830, connection terminal. DETAILED DESCRIPTION

[0039] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature include the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0041] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0043] Embodiment 1

[0044] like Figure 1 and Figure 2As shown, the present embodiment provides a transformer test auxiliary wiring device, which is used to cooperate with a plurality of resistance test wires 800 to test a transformer 700 to be tested. The resistance test wire 800 includes a wire bundle 820 and a test terminal 810 and a connection terminal 830 connected to the wire bundle 820. The transformer test auxiliary wiring device includes a bushing fixing unit 100, a grounding module, a connector 200 and a short-circuit interface 400; the bushing fixing unit 100 includes a straight rod 120 and a hook 110, and the hook 110 is fixed to one end of the straight rod 120; the grounding module can selectively The bushing voltage on the same voltage level side of the transformer 700 to be tested is anchored to the ground potential; the short-circuit interface 400 is electrically connected to the grounding module, the test terminal 810 is used to electrically connect the transformer terminal 720 on the transformer 700 to be tested, the connecting terminal 830 is used to electrically connect the short-circuit interface 400, and all the resistance test lines 800 are electrically connected to each other through the short-circuit interface 400; the connector 200 connects the other end of the straight rod 120 and the short-circuit interface 400, and a fixing buckle 300 is provided on the connector 200, and the wire harness bundle 820 can be detachably installed on the fixing buckle 300.

[0045] Specifically, the transformer 700 to be tested further includes a transformer bushing 710, a transformer terminal 720 is disposed at one end of the transformer bushing 710, and a bushing outer porcelain bottle 730 is sleeved on the outer side of the transformer bushing 710. In this embodiment, the transformer terminal 720 is a guide rod extending from the transformer bushing 710. In other implementations of this embodiment, the transformer terminal 720 is a screw hole, a wire, or other positions on the transformer 700 to be tested.

[0046] The transformer test auxiliary wiring device uses the bushing fixing unit 100 to achieve connection and fixation with the transformer terminal 720, and can collect and fix at least one resistance test line 800; the short-circuit interface 400 can be used to achieve the operation of short-circuiting the resistance test lines 800 with each other. Combined with the design of the short-circuit interface 400 electrically connecting the grounding module and the grounding module selectively connecting to the ground, the grounding of the resistance test line 800 can be achieved, so that static electricity can be quickly guided to the ground for discharge, ensuring the stability of the ground potential during the test. At the same time, the detachable design of the connection terminal 830 makes the operation easier and enhances the overall flexibility. The design of the hook 110 on the bushing fixing unit 100 is convenient for fixing the transformer terminal 720; combined with the setting of the fixing buckle 300, the purpose of positioning the resistance test line 800 is achieved, thereby achieving the guidance of the layout position of the resistance test line 800, facilitating the installation and fixation of the resistance test line 800, and improving the convenience and safety of the test as a whole. The transformer test auxiliary wiring device guides the resistance test line 800 to be laid out, and the resistance test line 800 is hung, fixed and short-circuited to the ground, avoiding the resistance test line 800 from touching the ground and the porcelain bottle 730 outside the bushing, so that the resistance test line 800 can be selectively insulated from the ground; under the premise of ensuring the stable operation of the resistance test line 800, operations such as short-circuiting and grounding can be performed. The above improvements reduce the risk of test personnel climbing when changing the test wiring, help to achieve accurate measurement of the test items of the transformer 700 to be tested, improve on-site work efficiency, and achieve safe and efficient testing of the transformer 700 to be tested. At the same time, the bushing voltage on the same voltage level side of the transformer 700 to be tested is stably anchored to the ground potential, which improves the accuracy and safety of the test.

[0047] The four-phase bushings of the transformer 700 to be tested, A, B, C, and O, are usually arranged in a straight line. The transformer test auxiliary wiring device needs to form a convergence point of four test lines respectively led from each bushing in the vertical direction with the bushings arranged in a straight line, so as to complete the operations of fixing, short-circuiting, and grounding. Specifically, there are four resistance test lines 800, each of which is used to connect one of the four-phase bushings.

[0048] The bushing fixing unit 100 is obliquely led out in a vertical direction to a lower position deviated from the bushing by a certain distance, so that when the A, B, C, and O four-phase bushing test lines are led down and converge at the transformer test auxiliary wiring device, the test lines deviate from the four-phase bushing porcelain bottle. The transformer test auxiliary wiring device and the transformer to be tested 700 are fixed by hooking the bent hook 110 on the transformer end 720.

[0049] In other implementations of this embodiment, the transformer test auxiliary wiring device and the transformer to be tested 700 are fixed by clamping. The specific fixing method is determined by technicians in this field based on engineering practice. The determination method is common knowledge in this field and will not be elaborated here.

[0050] In this embodiment, the grounding module includes a grounding cable and a grounding clamp 600. The short-circuit interface 400 is electrically connected to the grounding clamp 600 through the grounding cable. The grounding clamp 600 is used to guide static electricity to the ground for discharge; the connecting terminal 830 is detachably connected to the short-circuit interface 400, and the connecting member 200 is connected to the connecting terminal 830.

[0051] By limiting the specific structure of the grounding module, static electricity can be quickly and safely guided to the ground for discharge through the short-circuit interface 400, the grounding cable and the grounding clamp 600 in sequence, thereby avoiding the impact of static electricity on the testing process and ensuring the safety of testers.

[0052] In this embodiment, the short-circuit interface 400 may include a jack type, a knob type, a combination of multiple types, and other short-circuit types, and the grounding clamp 600 may be replaced with a fixed clamp or other grounding structures to achieve the grounding purpose.

[0053] Furthermore, the grounding module further includes a receiver 500 , through which the grounding cable passes, and the receiver 500 is used to reel in or unreel the grounding cable.

[0054] The receiver 500 can realize the reeling and unreeling of the grounding cable, thereby completing the extension and retraction of the grounding cable, which not only facilitates the management of the grounding cable, but also avoids the confusion of the grounding cable, and further improves the efficiency of the test.

[0055] In this embodiment, the connector 200 is a flexible wire, the fixing buckle 300 and the flexible wire form a positioning ring, and the wire bundle 820 is overlapped on the positioning ring. Specifically, the fixing buckle 300 and the flexible wire are integrally formed.

[0056] The design of using a flexible wire as the connecting piece 200 makes it easy to guide the resistance test wire 800 downward to a lower position, thereby limiting the relative range of movement between the bushing fixing unit 100 and the short-circuit interface 400, making it easy to adjust the relative position relationship between the bushing fixing unit 100 and the short-circuit interface 400, and improving the use flexibility of the transformer test auxiliary wiring device.

[0057] The setting of the positioning ring enables the wire bundle 820 to be stably overlapped on the fixing buckle 300 and the connector 200, so that the wire bundle 820 can be easily installed and fixed, thereby improving the convenience of the test and making the arrangement of the wire bundle more orderly. The setting of the positioning ring also reduces the risk of the wire bundle 820 being accidentally detached, further ensuring the stable layout position of the resistance test line 800 during the test, and improving the safety of the test.

[0058] Exemplarily, the resistance test line 800 further includes a binding piece, which is used to bind the wire bundle 820 .

[0059] The presence of the binding piece makes the wire harness bundle 820 more neat and stable, can enhance the stability of the wire harness bundle 820, avoids the wire harness from spreading out during the test, and enhances the controllability of the test.

[0060] The methods of fixing the binding pieces include fixing with Velcro, binding tape, filling bags and brackets. A single binding piece can fix multiple resistance test wires 800 together, or multiple binding pieces can fix one resistance test wire 800 respectively.

[0061] In this embodiment, the bushing fixing unit 100 is integrally formed. Based on the setting requirements of the bushing fixing unit 100, the integrally formed bushing fixing unit 100 has a certain hardness, thereby ensuring that the connection between the test terminal 810 and the transformer terminal 720 is more stable, avoiding the loosening or falling off phenomenon that may occur during the test process, helping to improve the safety and durability of the transformer test auxiliary wiring device, making the transformer test auxiliary wiring device more firm and reliable.

[0062] Exemplarily, the sleeve fixing unit 100 is made of insulating material or metal material.

[0063] The insulating material and the metal material have wide applicability, which ensures the safety and durability of the bushing fixing unit 100 and increases the service life.

[0064] like Figures 1 to 3 As shown, this embodiment provides a transformer test auxiliary wiring method, which is applied to the above-mentioned transformer test auxiliary wiring device, and includes the following steps:

[0065] Step 1: Install the wire harness bundle 820 on the fixing buckle 300 , and connect the connecting terminal 830 to the short-circuit interface 400 .

[0066] Step 2: Hook the hook 110 onto the transformer terminal 720 .

[0067] Step 3: Determine whether the transformer 700 to be tested needs to be insulated from the ground. If so, connect the test terminal 810 to the transformer terminal 720 to insulate the transformer 700 to the ground, and then proceed to step 4; if not, proceed directly to step 4.

[0068] Step 4: After the test is completed, remove the test terminal 810 from the transformer terminal 720, remove the hook 110 from the transformer 700 to be tested, remove the connection terminal 830 from the short-circuit interface 400, and finally take the wire harness 820 out of the fixing buckle 300.

[0069] The transformer test auxiliary wiring method can conveniently and quickly connect and fix the resistance test line 800, so as to accurately test various indicators of the transformer 700 to be tested, and provide a reliable basis for the quality assessment of the transformer 700 to be tested. The method is simple to operate and has clear steps, which can ensure that the line connection and removal during the test are accurate, ensure the accuracy and safety of the test, improve the efficiency of the test, and help to ensure the safety of the tester. Moreover, the above method also fully considers the safety of the tester and has a wide range of application prospects.

[0070] Embodiment 2

[0071] like Figure 4 and Figure 5 As shown, the transformer test auxiliary wiring device of the second embodiment is basically the same as the above-mentioned first embodiment. The difference between the two is that the bushing fixing unit 100 is provided with a receiving hole, and the wire bundle 820 is connected to the test terminal 810 through a test cable, and the test cable passes through the receiving hole.

[0072] Through the design of the test cable passing through the accommodating hole, the bushing fixing unit 100 plays a limiting role on the test cable, thereby improving the planning ability of the transformer test auxiliary wiring device for the resistance test line 800 without a position, and further reducing the probability of the resistance test line 800 being accidentally displaced. The design of the accommodating hole makes the straight rod 120 a channel for the test cable, enabling the test cable to pass in and out of the bushing fixing unit 100, making it easier to organize and fix the test cable, thereby improving the convenience of disassembly and assembly of the resistance test line 800 and reducing the difficulty of assembling the transformer test auxiliary wiring device.

[0073] In this embodiment, a guide hole is provided on the sleeve fixing unit 100; the accommodating hole extends along the length direction of the straight rod 120, and a first opening 121 is provided at one end of the accommodating hole away from the hook 110, and an end of the accommodating hole close to the hook 110 is connected to one end of the guide hole, and a second opening 122 is provided at the other end of the guide hole, and the test cable enters from the first opening 121 and exits from the second opening 122.

[0074] The design of the accommodation hole and the guide hole in coordination allows the test cable to pass through the sleeve fixing unit 100 in an orderly manner, making the direction of the test cable clearer, avoiding the entanglement and confusion of the test cable, and improving the fluency of the operation. At the same time, this design also facilitates the installation and positioning of the wire bundle 820, enhances the overall structurality of the transformer test auxiliary wiring device, and reduces the space occupied.

[0075] like Figures 4 to 6 As shown, this embodiment provides a transformer test auxiliary wiring method, which is applied to the above-mentioned transformer test auxiliary wiring device, and includes the following steps:

[0076] Step 1: Install the wire harness 820 on the fixing buckle 300, connect the connecting terminal 830 to the short-circuit interface 400, and pass the test cable through the receiving hole.

[0077] Step 2: Hook the hook 110 onto the transformer terminal 720 .

[0078] Step 3: Determine whether the transformer 700 to be tested needs to be insulated from the ground. If so, connect the test terminal 810 to the transformer terminal 720 to insulate the transformer 700 to the ground, and then proceed to step 4; if not, proceed directly to step 4.

[0079] Step 4: After the test is completed, remove the test terminal 810 from the transformer terminal 720, remove the hook 110 from the transformer 700 to be tested, remove the connecting terminal 830 from the short-circuit interface 400, take the test cable out of the bushing fixing unit 100, and finally take the wire bundle 820 out of the fixing buckle 300.

[0080] The transformer test auxiliary wiring method can conveniently and quickly connect and fix the resistance test line 800, so as to accurately test various indicators of the transformer 700 to be tested, and provide a reliable basis for the quality assessment of the transformer 700 to be tested. The method is simple to operate and has clear steps, which can ensure that the line connection and removal during the test are accurate, ensure the accuracy and safety of the test, improve the efficiency of the test, and help to ensure the safety of the tester. Moreover, the above method also fully considers the safety of the tester and has a wide range of application prospects.

[0081] By adopting a design of taking the test cable out of the receiving hole, the fixed resistance test line 800 can be assembled and disassembled on the sleeve fixing unit 100, further reducing the probability of position displacement of the resistance test line 800 during the test, thereby ensuring the success rate and safety of the test.

[0082] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A transformer test auxiliary wiring device, used for testing a transformer (700) to be tested in conjunction with a plurality of resistance test wires (800), wherein the resistance test wires (800) include a wire bundle (820) and a test terminal (810) and a connection terminal (830) connected to the wire bundle (820), characterized in that: The transformer test auxiliary wiring device comprises: A sleeve fixing unit (100) comprises a straight rod (120) and a curved hook (110), wherein the curved hook (110) is fixedly connected to one end of the straight rod (120); A grounding module capable of selectively anchoring the bushing voltage on the same voltage level side of the transformer to be tested (700) to ground potential; A shorting interface (400) is electrically connected to the grounding module, the test terminal (810) is used to electrically connect to the transformer terminal (720) on the transformer to be tested (700), the connection terminal (830) is used to electrically connect to the shorting interface (400), and all the resistance test lines (800) are electrically connected to each other through the shorting interface (400); A connecting piece (200) connects the other end of the straight rod (120) and the short-circuit interface (400); a fixing buckle (300) is provided on the connecting piece (200); and the wire harness bundle (820) is detachably mounted on the fixing buckle (300).

2. The transformer test auxiliary wiring device according to claim 1, characterized in that: The grounding module comprises a grounding cable and a grounding clamp (600); the short-circuit interface (400) is electrically connected to the grounding clamp (600) via the grounding cable; the grounding clamp (600) is used to guide static electricity to the ground for discharge; the connection terminal (830) is detachably connected to the short-circuit interface (400), and the connector (200) is connected to the connection terminal (830).

3. The transformer test auxiliary wiring device according to claim 2, characterized in that: The grounding module further comprises a receiver (500), the grounding cable passes through the receiver (500), and the receiver (500) is used to reel in or unreel the grounding cable.

4. The transformer test auxiliary wiring device according to claim 1, characterized in that: The sleeve fixing unit (100) is provided with a receiving hole, and the wire harness bundle (820) is connected to the test terminal (810) via a test cable, and the test cable passes through the receiving hole.

5. The transformer test auxiliary wiring device according to claim 4, characterized in that: A guide hole is provided on the sleeve fixing unit (100); the accommodating hole extends along the length direction of the straight rod (120); a first opening (121) is provided at one end of the accommodating hole away from the curved hook (110); an end of the accommodating hole close to the curved hook (110) is connected to one end of the guide hole; a second opening (122) is provided at the other end of the guide hole; the test cable enters from the first opening (121) and exits from the second opening (122).

6. The transformer test auxiliary wiring device according to claim 1, characterized in that: The connecting piece (200) is a flexible wire, the fixing buckle (300) and the flexible wire form a positioning ring, and the wire bundle (820) is overlapped on the positioning ring.

7. The transformer test auxiliary wiring device according to claim 1, characterized in that: The resistance test line (800) further comprises a binding member, and the binding member is used for binding the wire harness bundle (820).

8. The transformer test auxiliary wiring device according to claim 1, characterized in that: The sleeve fixing unit (100) is integrally formed.

9. The transformer test auxiliary wiring device according to claim 1, characterized in that: The sleeve fixing unit (100) is made of insulating material or metal material.

10. A transformer test auxiliary wiring method, applied to the transformer test auxiliary wiring device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S10: installing the wire harness bundle (820) on the fixing buckle (300), and connecting the connecting terminal (830) to the short-circuit interface (400); S20: hooking the bent hook (110) onto the transformer end (720); S30: determining whether the transformer (700) to be tested needs to be insulated from the ground; if so, connecting the test terminal (810) to the transformer terminal (720) to insulate the transformer (700) from the ground, and then proceeding to S40; if not, directly proceeding to S40; S40: After the test is completed, the test terminal (810) is removed from the transformer terminal (720), the hook (110) is removed from the transformer to be tested (700), the connection terminal (830) is removed from the short-circuit interface (400), and finally the wire bundle (820) is taken out from the fixing buckle (300).

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