Auxiliary wiring device and method for transformer test

Abstract

The application relates to the technical field of power equipment, and particularly discloses a transformer test auxiliary wiring device and method. 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 bent hook fixed to one end of the straight rod; the grounding module selectively anchors the voltage of the sleeve of the same voltage grade side of the transformer to be tested to the ground potential; the short-circuit interface is electrically connected with the grounding module; a test end is used for electrically connecting the transformer end on the transformer to be tested; a connecting end is used for electrically connecting the short-circuit interface; all the resistance test lines are electrically connected with each other through the short-circuit interface; the connecting piece connects the other end of the straight rod and the short-circuit interface; the connecting piece is provided with a fixing buckle; and a wire harness bundle can be detachably installed on the fixing buckle. The device is used for guiding the resistance test lines, avoiding touching the ground and the porcelain bottle outside the sleeve, and can realize the ground insulation of the resistance test lines; thus, short-circuit and grounding operations can be performed, the measurement of the test items of the transformer to be tested can be realized, and the on-site work efficiency is improved.

Description

TECHNICAL FIELD

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

[0002] The transformer is one of the most important electrical equipment in the entire power system, which can not only raise the voltage to send the electric energy to the power consumption area, but also reduce the voltage to the use voltage of each level to meet the power demand. With the continuous growth of power supply load and the continuous progress of transformer manufacturing process, in order to obtain better power transmission capacity, the diameter of the transformer conducting rod becomes larger and larger, and in order to enable the transformer to operate safely and stably, the maintenance personnel need to carry out the test such as DC resistance, bushing test, short-circuit impedance and power-off routine according to the period, so as to judge whether the operation condition of the transformer is good.

[0003] In the transformer preventive test, especially the 220kV transformer conventional high voltage test, the test time needs about three hours, and the test process needs to spend a lot of time to change the test wiring. The 220kV transformer conventional high voltage test items mainly include three items of insulation resistance test, bushing dielectric loss and capacitance test and DC resistance test. The insulation resistance test and the bushing dielectric loss and capacitance test need to short-circuit the high voltage A, B, C and O four-phase bushing, and the test needs to switch between the grounded and ungrounded states, and when ungrounded, the overall insulation to the ground should be maintained, and the ground and the bushing porcelain bottle should not be touched, and the DC resistance test needs to use the test line to lead the high voltage A, B, C and O four-phase bushing to the DC resistance tester respectively for related test.

[0004] Because the height of the high voltage bushing of the 220kV transformer is high, there is a risk of falling from a high place in the process of changing the test wiring, and because the time is long, the number of climbing operation should be reduced as much as possible, and the test personnel can use the DC resistance test line to lead the high voltage A, B, C and O four-phase bushing down for short-circuiting, and then use the insulating rope to hang up and maintain the insulation to the ground to complete the insulation resistance test, bushing dielectric loss and capacitance test, and then lead the DC resistance test line to the DC resistance tester to complete the DC resistance test. The above method can reduce the number of climbing and changing the wiring and improve the work efficiency on site, but there are problems such as poor insulation of the insulating rope and poor fixation, which directly affect the test results. If the test needs to be changed again, the test time will be further prolonged. SUMMARY

[0005] The present application aims to provide a transformer test auxiliary wiring device and method to realize accurate measurement of transformer test items and improve the work efficiency on site.

[0006] To achieve this purpose, the present application adopts the following technical solutions:

[0007] The application relates to a transformer test auxiliary wiring device for testing a transformer to be tested in cooperation with a plurality of resistance test lines, wherein the resistance test lines comprise a wire bundle, a test end and a connecting end connected to the wire bundle; the transformer test auxiliary wiring device comprises a bushing fixing unit, a grounding module, a connecting piece and a short-circuit interface; the bushing fixing unit comprises a straight rod and a bent hook, the bent hook is fixed to one end of the straight rod; the grounding module can selectively anchor the same voltage level side bushing voltage of the transformer to be tested to the ground potential; the short-circuit interface is electrically connected to the grounding module; the test end is used for electrically connecting the transformer end of the transformer to be tested; the connecting end is used for electrically connecting the short-circuit interface; all the resistance test lines are electrically connected to each other through the short-circuit interface; the connecting piece connects the other end of the straight rod and the short-circuit interface; the wire bundle is detachably installed on the fixing buckle.

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

[0009] As an optional technical scheme of the transformer test auxiliary wiring device, the grounding module further comprises a receiver; the grounding cable passes through the receiver; and the receiver is used for winding or unwinding the grounding cable.

[0010] As an optional technical scheme of the transformer test auxiliary wiring device, the bushing fixing unit is provided with a containing hole; the wire bundle is connected to the test end through a test cable; and the test cable passes through the containing hole.

[0011] As an optional technical scheme of the transformer test auxiliary wiring device, a guide hole is formed in the bushing fixing unit; the containing hole extends along the length direction of the straight rod; a first opening is arranged at the end of the containing hole away from the bent hook; the end of the containing hole close to the bent hook is in communication with one end of the guide hole; a second opening is formed in the other end of the guide hole; the test cable passes into the first opening and passes out of the second opening.

[0012] As an optional technical scheme of 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 lapped on the positioning ring.

[0013] As an optional technical scheme of the transformer test auxiliary wiring device, the resistance test line further comprises a binding piece; and the binding piece is used for binding the wire bundle.

[0014] As an optional technical scheme of the transformer test auxiliary wiring device, the sleeve fixing unit is integrally formed.

[0015] As an optional technical scheme of the transformer test auxiliary wiring device, the sleeve fixing unit is integrally formed.

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

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

[0018] S20: hook the hook on the transformer end head;

[0019] S30: judge whether the to-be-tested transformer needs to be insulated from the ground, if yes, connect the test end head to the transformer end head, make the to-be-tested transformer be insulated from the ground, and then perform S40, if not, directly perform S40;

[0020] S40: after the test is completed, remove the test end head from the transformer end head, take down the hook from the to-be-tested transformer, remove the connecting end head from the short circuit interface, and finally take out the wire harness bundle from the fixing buckle.

[0021] The beneficial effects of the present application are as follows:

[0022] The transformer test auxiliary wiring device realizes the connection and fixation with the transformer end through the sleeve fixation unit, and can collect and fix at least one resistance test line; the short-circuit interface can realize the mutual short-circuit operation of the resistance test lines, and the design of the short-circuit interface electrically connected to the grounding module and the selective connection of the grounding module to the ground can realize the grounding of the resistance test lines, so that the static electricity can be quickly guided to the ground for discharge, and the ground potential during the test is stable. At the same time, the detachable design of the connection end makes the operation more convenient and enhances the overall flexibility. The design of the hook on the sleeve fixation unit facilitates the fixation of the transformer end; in combination with the setting of the fixation buckle, the positioning purpose of the resistance test line is achieved, so that the installation and fixation of the resistance test line are facilitated, and the convenience and safety of the test are improved as a whole. The transformer test auxiliary wiring device fixes and short-circuits the resistance test line by guiding the layout position of the resistance test line, avoids the resistance test line from touching the ground and the porcelain bottle outside the sleeve, and enables the resistance test line to realize selective ground insulation; under the premise of ensuring the stable work of the resistance test line, short-circuiting and grounding operations can be performed. The above improvements reduce the risk of test personnel climbing during the transformation test wiring, help to realize the accurate measurement of the test items of the transformer under test, improve the work efficiency on site, and realize the safe and efficient test of the transformer under test. At the same time, the sleeve voltage of the same voltage grade side of the transformer under test is stably anchored to the ground potential, improving 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 various indicators of the transformer under test, and provide a reliable basis for quality evaluation of the transformer under test. The method is simple to operate and has clear steps, can ensure accurate connection and removal of the line during the test, guarantee the accuracy and safety of the test, improve the test efficiency, and is beneficial to the safety of the test personnel. Moreover, the above method also fully considers the safety of the test personnel, and has a wide application prospect. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a structural schematic view of the transformer test auxiliary wiring device provided by the embodiment one of the present application;

[0025] Figure 2 is a structural schematic view of the transformer test auxiliary wiring device and the transformer under test provided by the embodiment one of the present application;

[0026] Figure 3 is a flowchart of the transformer test auxiliary wiring method provided by the embodiment one of the present application;

[0027] Figure 4is a structural schematic view of the transformer test auxiliary wiring device provided by the second embodiment of the present application;

[0028] Figure 5 is a structural schematic view of the transformer test auxiliary wiring device and the transformer to be tested provided by the second embodiment of the present application;

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

[0030] in the figure:

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

[0032] 200, connecting piece;

[0033] 300, fixing buckle;

[0034] 400, short circuit interface;

[0035] 500, storage device;

[0036] 600, ground clamp;

[0037] 700, transformer to be tested; 710, transformer sleeve; 720, transformer end; 730, sleeve outer porcelain bottle;

[0038] 800, resistance test wire; 810, test end; 820, wire harness bundle; 830, connecting end. DETAILED DESCRIPTION

[0039] The technical solutions of the present application will be described clearly and completely below in combination with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0040] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", are only for the purpose of description, and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and moreover, the "above", "over" and "on" of the first feature to the second feature include the first feature above and obliquely above the second feature, or only indicate that the first feature is higher than the second feature in horizontal height. The "below", "under" and "under" of the first feature to the second feature include the first feature below and obliquely below the second feature, or only indicate that the first feature is lower than the second feature in horizontal height.

[0041] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0042] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation on the present application.

[0043] Example one

[0044] As Figure 1 and Figure 2As shown, the embodiment provides a transformer test auxiliary wiring device for testing the transformer to be tested 700 with a plurality of resistance test lines 800, the resistance test lines 800 including a wire bundle bundle 820 and a test end head 810 and a connecting end head 830 connected to the wire bundle bundle 820, the transformer test auxiliary wiring device including a bushing fixing unit 100, a grounding module, a connecting piece 200 and a short circuit interface 400; the bushing fixing unit 100 includes a straight rod 120 and a bent hook 110, the bent hook 110 being fixedly connected to one end of the straight rod 120; the grounding module can selectively anchor the same voltage level side bushing voltage of the transformer to be tested 700 to the ground potential; the short circuit interface 400 is electrically connected to the grounding module, the test end head 810 is used for electrically connecting the transformer end head 720 on the transformer to be tested 700, the connecting end head 830 is used for electrically connecting 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 connecting piece 200 connects the other end of the straight rod 120 and the short circuit interface 400, and the connecting piece 200 is provided with a fixing buckle 300, and the wire bundle bundle 820 can be detachably installed on the fixing buckle 300.

[0045] Specifically, the transformer to be tested 700 further includes a transformer bushing 710, the transformer end head 720 is arranged at one end of the transformer bushing 710, and a bushing outer porcelain bottle 730 is sleeved on the outside of the transformer bushing 710. In the embodiment, the transformer end head 720 is a lead rod protruding from the transformer bushing 710. In other embodiments of the embodiment, the transformer end head 720 is a screw hole, a wire or other positions on the transformer to be tested 700.

[0046] The transformer test auxiliary wiring device realizes the connection and fixation with the transformer end 720 by using the bushing fixing unit 100, can collect and fix at least one resistance test line 800, can realize the mutual short-circuiting operation between the resistance test lines 800 by using the short-circuiting interface 400, and can realize the grounding of the resistance test line 800 by combining the design of the short-circuiting interface 400 electrically connected to the grounding module and the selective connection of the grounding module to the ground, so that the static electricity can be quickly guided to the ground for discharge, and the ground potential during the test is stable. At the same time, the detachable design of the connection end 830 makes the operation more convenient and enhances the overall flexibility. The design of the hook 110 on the bushing fixing unit 100 facilitates the fixation of the transformer end 720; in combination with the setting of the fixing buckle 300, the positioning purpose of the resistance test line 800 is achieved, so as to realize the guidance of the laying position of the resistance test line 800, facilitate the installation and fixation of the resistance test line 800, and improve the convenience and safety of the test as a whole. The transformer test auxiliary wiring device fixes and short-circuits the resistance test line 800 by guiding the laying position of the resistance test line 800, avoids the situation that the resistance test line 800 touches the ground and the bushing porcelain bottle 730, and enables the resistance test line 800 to realize selective ground insulation; under the premise of ensuring the stable work of the resistance test line 800, the short-circuiting and grounding operations can be performed. The above improvement reduces the risk of test personnel climbing during the transformation test wiring, helps to realize the accurate measurement of the test items of the transformer to be tested 700, improves the work efficiency on site, and realizes the safe and efficient test of the transformer to be tested 700. At the same time, the same voltage level side bushing voltage of the transformer to be tested 700 is stably anchored to the ground potential, which improves the accuracy and safety of the test.

[0047] The high-voltage A, B, C and O four-phase bushings of the transformer to be tested 700 are usually arranged in a linear type, and the transformer test auxiliary wiring device needs to form a convergence point of four test lines respectively drawn down from each bushing in the vertical direction of the linearly arranged bushings to complete the fixation, short-circuiting and grounding operations. Specifically, the resistance test line 800 is provided with four resistance test lines 800, and each resistance test line 800 is used to connect one of the four-phase bushings.

[0048] The bushing fixing unit 100 is obliquely led to a lower position deviated from the bushing in the vertical direction of the linearly arranged bushings, so that when the A, B, C and O four-phase bushing test lines are drawn down and converged at the transformer test auxiliary wiring device, the test lines deviate from the four-phase bushing porcelain bottles, and the fixation mode of the transformer test auxiliary wiring device and the transformer to be tested 700 is that the hook 110 is hooked and fixed on the transformer end 720.

[0049] In other embodiments of the present embodiment, the transformer test auxiliary wiring device is clamped to the transformer to be tested 700, and the specific clamping manner is determined by those skilled in the art according to the actual engineering, which is a common knowledge in the art and will not be described here.

[0050] In the present 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, and the grounding clamp 600 is used to guide static electricity to the ground for discharge; the connection end 830 is detachably connected to the short circuit interface 400, and the connecting piece 200 is connected to the connection end 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 turn, thereby avoiding the influence of static electricity on the test process and ensuring the safety of the test personnel.

[0052] In the present embodiment, the short circuit interface 400 can include a jack type, a knob type, a variety of mixed ways and other short circuit methods, and the grounding clamp 600 can be replaced by a fixed clamp or other grounding structure to complete the grounding purpose.

[0053] Further, the grounding module further includes a receiver 500, the grounding cable passes through the receiver 500, and the receiver 500 is used to wind or unwind the grounding cable.

[0054] The receiver 500 can realize the winding and unwinding 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 test efficiency.

[0055] In the present embodiment, the connecting piece 200 is a flexible wire, the fixed buckle 300 and the flexible wire form a positioning ring, and the wire harness bundle 820 is overlapped on the positioning ring. Specifically, the fixed buckle 300 is integrally formed with the flexible wire.

[0056] The flexible wire is adopted as the connecting piece 200, which is easy to guide the resistance test wire 800 downward to a lower place, thereby limiting the relative movement range between the sleeve fixing unit 100 and the short circuit interface 400, facilitating the adjustment of the relative position relationship between the sleeve fixing unit 100 and the short circuit interface 400, and improving the use flexibility of the transformer test auxiliary wiring device.

[0057] The positioning ring ensures that the wire harness bundle 820 can be stably attached to the fixing clip 300 and the connector 200, facilitating the installation and fixation of the wire harness bundle 820. This improves the convenience of testing and makes the wire harness more organized. The positioning ring also reduces the risk of the wire harness bundle 820 accidentally detaching, further ensuring the stable placement of the resistance test leads 800 during testing and improving testing safety.

[0058] For example, the resistance test lead 800 also includes a binding element for binding the wire harness bundle 820.

[0059] The presence of the binding element makes the wire harness bundle 820 neater and more stable, which enhances the stability of the wire harness bundle 820, prevents the wire harness from unraveling during the test, and enhances the controllability of the test.

[0060] The binding components can be secured by methods such as using Velcro wrapping, cable ties, bag filling, and bracket placement. Multiple resistance test leads 800 can be secured together by a single binding component, or multiple binding components can be used to secure one resistance test lead 800 respectively.

[0061] In this embodiment, the bushing fixing unit 100 is integrally formed. Based on the requirements of the bushing fixing unit 100, the integrally formed bushing fixing unit 100 has a certain degree of rigidity, thereby ensuring a more stable connection between the test end 810 and the transformer end 720, avoiding loosening or detachment that may occur during testing, and helping to improve the safety and durability of the transformer test auxiliary wiring device, making the transformer test auxiliary wiring device more robust and reliable.

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

[0063] The wide applicability of insulating and metallic materials ensures the safety and durability of the sleeve fixing unit 100, and extends its service life.

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

[0065] Step 1: Install the wire harness bundle 820 onto the fixing buckle 300, and connect the connecting end 830 to the shorting interface 400.

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

[0067] Step three: judging whether the transformer 700 needs to be insulated from the ground, if yes, connecting the test terminal 810 to the transformer terminal 720, making the transformer 700 insulated from the ground, and then proceeding to step four; if not, directly proceeding to step four.

[0068] Step four: after the test is completed, removing the test terminal 810 from the transformer terminal 720, taking off the hook 110 from the transformer 700, removing the connecting terminal 830 from the short circuit interface 400, and finally taking out the wire bundle 820 from the fixing buckle 300.

[0069] The transformer test auxiliary wiring method can conveniently and quickly connect and fix the resistance test wire 800, thereby accurately testing various indicators of the transformer 700 under test, providing a reliable basis for quality evaluation of the transformer 700 under test. The method is simple to operate and the steps are clear, which can ensure accurate connection and removal of the line during the test, ensuring the accuracy and safety of the test, improving the efficiency of the test, and being beneficial to the safety of the test personnel. Moreover, the above method also fully considers the safety of the test personnel, and has a wide application prospect.

[0070] Embodiment two

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

[0072] Through the design of the test cable passing through the containing hole, the sleeve 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 position of the resistance test wire 800, and further reducing the probability of position deviation of the resistance test wire 800 due to accidents. The design of the containing hole makes the straight rod 120 become a channel for the test cable, realizing the entry and exit of the test cable on the sleeve fixing unit 100, facilitating the arrangement and fixation of the test cable, thereby improving the convenience of disassembly of the resistance test wire 800 and reducing the assembly difficulty of the transformer test auxiliary wiring device.

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

[0074] The design of the accommodating hole matched with the guide hole enables the test cable to pass through the sleeve fixing unit 100 in order, makes the test cable more clear, avoids the entanglement and confusion of the test cable, and improves the operation fluency. Meanwhile, the design also facilitates the installation and positioning of the wire harness bundle 820, enhances the overall structural property of the transformer test auxiliary wiring device, and reduces the occupied space.

[0075] As shown in Figures 4 to 6 The embodiment provides a transformer test auxiliary wiring method applied to the transformer test auxiliary wiring device and comprising the following steps:

[0076] Step one: install the wire harness bundle 820 on the fixing buckle 300, connect the connecting end head 830 to the short circuit interface 400, and pass the test cable through the accommodating hole.

[0077] Step two: hook the hook 110 to the transformer end head 720.

[0078] Step three: determine whether the transformer to be tested 700 needs to be insulated from the ground, if yes, connect the test end head 810 to the transformer end head 720 to insulate the transformer to be tested 700 from the ground, and then perform step four; if not, directly perform step four.

[0079] Step four: after the test is completed, remove the test end head 810 from the transformer end head 720, take down the hook 110 from the transformer to be tested 700, remove the connecting end head 830 from the short circuit interface 400, take out the test cable from the sleeve fixing unit 100, and finally take out the wire harness bundle 820 from the fixing buckle 300.

[0080] The transformer test auxiliary wiring method can conveniently and quickly connect and fix the resistance test cable 800, so as to accurately test various indexes of the transformer to be tested 700 and provide a reliable basis for the quality evaluation of the transformer to be tested 700. The method is simple and clear in steps, can ensure the accurate connection and removal of the line in the test process, guarantees the accuracy and safety of the test, improves the test efficiency, and is beneficial to the safety of the test personnel. Moreover, the above method also fully considers the safety of the test personnel and has a wide application prospect.

[0081] Through the design of taking and placing the test cable from the accommodating hole, the disassembly and assembly of the fixed resistance test cable 800 on the sleeve fixing unit 100 are realized, the probability of position deviation of the resistance test cable 800 in the test process is further reduced, and the success rate and safety of the test are guaranteed.

[0082] Obviously, the above embodiments of the present application are merely example for clearly explaining the present application, and are not intended to limit the embodiments of the present application. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, it is not necessary and also impossible to enumerate all the embodiments. Any modification, equivalent replacement and improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A transformer testing auxiliary wiring device, used to cooperate with multiple resistance test leads (800) to test a transformer under test (700), wherein the resistance test leads (800) include a wire harness bundle (820) and test terminals (810) and connection terminals (830) connected to the wire harness bundle (820), characterized in that, The transformer test auxiliary wiring device includes: The sleeve fixing unit (100) includes a straight rod (120) and a hook (110), wherein the hook (110) is fixed to one end of the straight rod (120); The grounding module can selectively anchor the bushing voltage of the same voltage level side of the transformer under test (700) to the ground potential; The 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 under test (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 connector (200) connects the other end of the straight rod (120) and the short connector (400). The connector (200) is provided with a fixing buckle (300), and the wire harness bundle (820) can be detachably installed on the fixing buckle (300). The grounding module includes a grounding cable and a grounding clamp (600). The shorting 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 end (830) is detachably connected to the shorting interface (400), and the connector (200) is connected to the connecting end (830).

2. The transformer testing auxiliary wiring device according to claim 1, characterized in that, The grounding module also includes a receiver (500) through which the grounding cable passes, and the receiver (500) is used to wind up or unwind the grounding cable.

3. The transformer testing 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 end (810) through a test cable, which passes through the receiving hole.

4. The transformer testing auxiliary wiring device according to claim 3, characterized in that, The sleeve fixing unit (100) is provided with a guide hole; the receiving hole extends along the length direction of the straight rod (120), and the receiving hole is provided with a first opening (121) at the end away from the hook (110), and the receiving hole is connected to one end of the guide hole at the end near the hook (110), and the other end of the guide hole is provided with a second opening (122). The test cable passes through the first opening (121) and exits through the second opening (122).

5. The transformer testing auxiliary wiring device according to claim 1, characterized in that, The connector (200) is a flexible wire, the fixing buckle (300) and the flexible wire form a positioning ring, and the wire bundle (820) overlaps the positioning ring.

6. The transformer testing auxiliary wiring device according to claim 1, characterized in that, The resistance test lead (800) also includes a binding element for binding the wire harness bundle (820).

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

8. The transformer testing auxiliary wiring device according to claim 1, characterized in that, The sleeve fixing unit (100) is made of insulating material.

9. A transformer testing auxiliary wiring method, applied to the transformer testing auxiliary wiring device according to any one of claims 1-8, characterized in that, Includes the following steps: S10: Install the wire harness bundle (820) onto the fixing buckle (300), and connect the connecting end (830) to the shorting interface (400). S20: Hook the hook (110) onto the transformer end (720); S30: Determine whether the transformer under test (700) needs to be insulated from ground. If yes, connect the test terminal (810) to the transformer terminal (720) to insulate the transformer under test (700) from ground, and then proceed to S40. If no, proceed directly to S40. S40: After the test is completed, remove the test end (810) from the transformer end (720), remove the hook (110) from the transformer under test (700), remove the connection end (830) from the shorting interface (400), and finally remove the wire harness bundle (820) from the fixing buckle (300).

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