A multi-port test connection device for a main transformer

Abstract

The application discloses a kind of main transformer multiport test wiring device, high voltage side wiring terminal, high voltage side terminal post, low voltage side wiring terminal, high voltage side grounding terminal, low voltage side grounding terminal, air switch, bushing end screen wiring terminal and wiring copper column are integrated on the box of main transformer multiport test wiring device, and the cooperation linkage of insulating auxiliary support, short-circuiting piece and insulating linkage rod is used to realize the short-circuiting and disconnection of high voltage side grounding terminal and fourth high voltage side wiring terminal, staff need not to climb many times, only need to climb 2 times to complete the installation and removal work of all test wiring, place down lead on the main transformer multiport test wiring device, and change wiring mode according to test project, connect test instrument, solve the technical problem that existing technology needs staff to climb transformer many times to change test wiring when carrying out main transformer preventive test, not only there is security risk, but also greatly increases test time.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of transformer test auxiliary tool, and particularly relates to a main transformer multi-port test wiring device. BACKGROUND

[0002] In order to ensure the safe operation of the main transformer, the preventive test of the main transformer needs to be carried out regularly, and the test content includes DC resistance test, insulation resistance test, bushing capacitance dielectric loss test and the like. Different test projects design different test wiring modes. When the preventive test of the main transformer is carried out, the work personnel need to climb the transformer for many times to change the test wiring because different test projects have different requirements for the connection mode of the high-voltage lead-out point and the end screen of the bushing on each side of the main transformer. Not only there is a safety hazard, but also the test time is greatly increased. SUMMARY

[0003] The present application provides a main transformer multi-port test wiring device, which is used to solve the technical problem that the work personnel need to climb the transformer for many times to change the test wiring when the preventive test of the main transformer is carried out in the prior art, not only there is a safety hazard, but also the test time is greatly increased.

[0004] Therefore, the present application provides a main transformer multi-port test wiring device, which comprises a box body, a high-voltage side wiring terminal, a high-voltage side wiring column, a low-voltage side wiring terminal, a high-voltage side grounding terminal, a low-voltage side grounding terminal, an air switch, a bushing end screen wiring terminal, a wiring copper column, an insulation auxiliary support, a short-circuit piece 4 and an insulation linkage rod;

[0005] Two opposite sides of the box body are a high-voltage side panel and a low-voltage side panel, respectively;

[0006] The high-voltage side wiring terminal comprises a first high-voltage side wiring terminal, a second high-voltage side wiring terminal, a third high-voltage side wiring terminal and a fourth high-voltage side wiring terminal which are installed on the high-voltage side panel, one end of the first high-voltage side wiring terminal, the second high-voltage side wiring terminal, the third high-voltage side wiring terminal and the fourth high-voltage side wiring terminal is in the box body, and the other end protrudes from the high-voltage side panel;

[0007] The wiring copper column comprises a first wiring copper column, a second wiring copper column, a third wiring copper column and a fourth wiring copper column which are installed on the high-voltage side panel, one end of the first wiring copper column, the second wiring copper column, the third wiring copper column and the fourth wiring copper column is in the box body, and the other end protrudes from the high-voltage side panel, the first wiring copper column is electrically connected with the first high-voltage side wiring terminal, the second wiring copper column is electrically connected with the second high-voltage side wiring terminal, the third wiring copper column is electrically connected with the third high-voltage side wiring terminal, and the fourth wiring copper column is electrically connected with the fourth high-voltage side wiring terminal;

[0008] The high-voltage side terminal includes a first high-voltage side terminal, a second high-voltage side terminal, a third high-voltage side terminal and a fourth high-voltage side terminal installed on the high-voltage side panel, one end of the first high-voltage side terminal, the second high-voltage side terminal, the third high-voltage side terminal and the fourth high-voltage side terminal is inside the box body, and the other end protrudes from the high-voltage side panel;

[0009] The high-voltage side grounding terminal is installed on the high-voltage side panel;

[0010] The low-voltage side terminal includes a first low-voltage side terminal, a second low-voltage side terminal, a third low-voltage side terminal, a fourth low-voltage side terminal, a fifth low-voltage side terminal and a sixth low-voltage side terminal installed on the low-voltage side panel, one end of the first low-voltage side terminal, the second low-voltage side terminal, the third low-voltage side terminal, the fourth low-voltage side terminal, the fifth low-voltage side terminal and the sixth low-voltage side terminal is inside the box body, and the other end protrudes from the low-voltage side panel;

[0011] The bushing terminal includes a first bushing terminal, a second bushing terminal, a third bushing terminal and a fourth bushing terminal installed on the low-voltage side panel, one end of the first bushing terminal, the second bushing terminal, the third bushing terminal and the fourth bushing terminal is inside the box body, and the other end protrudes from the low-voltage side panel;

[0012] The low-voltage side grounding terminal includes a first low-voltage side grounding terminal and a second low-voltage side grounding terminal installed on the low-voltage side panel;

[0013] The air switch includes a first air switch and a second air switch installed on the low-voltage side panel, the first air switch is used with the low-voltage side terminal, and the second air switch is used with the bushing terminal;

[0014] The insulation auxiliary support includes a first support and a second support arranged in an up-down manner, the first support and the second support are installed in the box body parallel to the high-voltage side panel, and the two ends of the first support and the second support are fixed on the two sides of the box body, respectively;

[0015] One end of the short-circuit piece is rotatably connected to the first support through a conductive rotating rod, one end of the conductive rotating rod is movably installed on the first support, and the other end is connected to the high-voltage side grounding terminal, the other end of the short-circuit piece is provided with a protrusion, the protrusion is movably arranged in the movable slot of the second support, and the other end of the fourth high-voltage side terminal inside the box body is located in the movable slot;

[0016] A long through hole for the movement of the insulation linkage rod is arranged on the top of the box body, one end of the insulation linkage rod is arranged outside the box body, and the other end extends into the box body and is fixedly connected to one end of the short-circuit piece.

[0017] Optionally, the active caster with brake is detachably installed at the four corners of the bottom of the box body.

[0018] The active caster with brake is detachably installed at the four corners of the bottom of the box body.

[0019] Optionally, the high-voltage side grounding terminal, the first high-voltage side terminal, the second high-voltage side terminal, the third high-voltage side terminal and the fourth high-voltage side terminal are cross-shaped terminals, and the first high-voltage side terminal, the second high-voltage side terminal, the third high-voltage side terminal and the fourth high-voltage side terminal are plug-in type terminals.

[0020] Optionally, the first low-voltage side terminal, the second low-voltage side terminal, the third low-voltage side terminal, the fourth low-voltage side terminal, the fifth low-voltage side terminal and the sixth low-voltage side terminal are plug-in type terminals.

[0021] Optionally, a dustproof brush is arranged in the long through hole.

[0022] Optionally, an insulating handle is arranged at the top of the box body.

[0023] From the above technical solutions, it can be seen that the main transformer multi-port test wiring device provided by the application has the following advantages:

[0024] The main transformer multi-port test wiring device provided by the application integrates the high-voltage side terminal, the high-voltage side terminal, the low-voltage side terminal, the high-voltage side grounding terminal, the low-voltage side grounding terminal, the air switch, the bushing end screen terminal and the terminal copper column on the box body of the main transformer multi-port test wiring device, and realizes the short-circuiting and disconnection of the high-voltage side grounding terminal and the fourth high-voltage side terminal through the cooperation and linkage of the insulating auxiliary support, the short-circuiting piece and the insulating linkage rod. The worker does not need to climb the transformer multiple times, but only needs to climb twice to complete the installation and removal of all test wiring. The down lead is placed on the main transformer multi-port test wiring device, and the wiring mode is changed according to the test project, and the test instrument is connected to complete the direct current resistance test, the insulation resistance test and the bushing capacitance dielectric loss test. The high-altitude work is simplified, the high-altitude test work becomes simple, efficient and safe, and the technical problem that the worker needs to climb the transformer multiple times to change the test wiring during the main transformer preventive test in the prior art is solved, which not only exists a safety hazard, but also greatly increases the test time. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the application, and those skilled in the art can obtain other related drawings according to these drawings without creating any inventive labor.

[0026] Figure 1 Structure diagram of the main transformer multi-port test wiring device provided in the present application (without the low-voltage side panel);

[0027] Figure 2 Structure diagram of the high-voltage side panel of the main transformer multi-port test wiring device provided in the present application;

[0028] Figure 3 Structure diagram of the low-voltage side panel of the main transformer multi-port test wiring device provided in the present application;

[0029] In the drawings, the reference signs are as follows:

[0030] 1, box; 10, high-voltage side panel; 101, first high-voltage side wiring terminal; 102, second high-voltage side wiring terminal; 103, third high-voltage side wiring terminal; 104, fourth high-voltage side wiring terminal; 105, high-voltage side grounding terminal; 106, first high-voltage side wiring post; 107, second high-voltage side wiring post; 108, third high-voltage side wiring post; 109, fourth high-voltage side wiring post; 11, low-voltage side panel; 2-1, first wiring copper post; 2-2, second wiring copper post; 2-3, third wiring copper post; 2-4, fourth wiring copper post; 111, first low-voltage side grounding terminal; 112, first air switch; 113, second air switch; 114, second low-voltage side grounding terminal; 115, first low-voltage side wiring terminal; 116, second low-voltage side wiring terminal; 117, third low-voltage side wiring terminal; 118, fourth low-voltage side wiring terminal; 119, fifth low-voltage side wiring terminal; 120, sixth low-voltage side wiring terminal; 121, first bushing end screen wiring terminal; 122, second bushing end screen wiring terminal; 123, third bushing end screen wiring terminal; 124, fourth bushing end screen wiring terminal; 3-1, first support; 3-2, second support; 4, short-circuiting piece; 5, insulation linkage rod. DETAILED DESCRIPTION

[0031] In order to enable persons skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a 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 persons skilled in the art without creative labor fall within the protection scope of the present application.

[0032] For the convenience of understanding, please refer to Figure 1The embodiment of the main transformer multi-port test wiring device provided in the application comprises a box 1, a high-voltage side wiring terminal, a high-voltage side wiring column, a low-voltage side wiring terminal, a high-voltage side grounding terminal 105, a low-voltage side grounding terminal, an air switch, a bushing end screen wiring terminal, a wiring copper column, an insulation auxiliary support, a short-circuit piece 4 and an insulation linkage rod;

[0033] Two opposite sides of the box 1 are a high-voltage side panel 10 and a low-voltage side panel 11 respectively;

[0034] The high-voltage side wiring terminal comprises a first high-voltage side wiring terminal 101, a second high-voltage side wiring terminal 102, a third high-voltage side wiring terminal 103 and a fourth high-voltage side wiring terminal 104 installed on the high-voltage side panel 10, one end of the first high-voltage side wiring terminal 101, the second high-voltage side wiring terminal 102, the third high-voltage side wiring terminal 103 and the fourth high-voltage side wiring terminal 104 being inside the box 1, and the other end protruding from the high-voltage side panel 10;

[0035] The wiring copper column comprises a first wiring copper column 2-1, a second wiring copper column 2-2, a third wiring copper column 2-3 and a fourth wiring copper column 2-4 installed on the high-voltage side panel 10, one end of the first wiring copper column 2-1, the second wiring copper column 2-2, the third wiring copper column 2-3 and the fourth wiring copper column 2-4 being inside the box 1, and the other end protruding from the high-voltage side panel 10, the first wiring copper column 2-1 being electrically connected with the first high-voltage side wiring terminal 101, the second wiring copper column 2-2 being electrically connected with the second high-voltage side wiring terminal 102, the third wiring copper column 2-3 being electrically connected with the third high-voltage side wiring terminal 103, and the fourth wiring copper column 2-4 being electrically connected with the fourth high-voltage side wiring terminal 104;

[0036] The high-voltage side wiring column comprises a first high-voltage side wiring column 106, a second high-voltage side wiring column 107, a third high-voltage side wiring column 108 and a fourth high-voltage side wiring column 109 installed on the high-voltage side panel 10, one end of the first high-voltage side wiring column 106, the second high-voltage side wiring column 107, the third high-voltage side wiring column 108 and the fourth high-voltage side wiring column 109 being inside the box 1, and the other end protruding from the high-voltage side panel 10;

[0037] The high-voltage side grounding terminal 105 is installed on the high-voltage side panel 10;

[0038] The low-voltage side wiring terminals include a first low-voltage side wiring terminal 115, a second low-voltage side wiring terminal 116, a third low-voltage side wiring terminal 117, a fourth low-voltage side wiring terminal 118, a fifth low-voltage side wiring terminal 119 and a sixth low-voltage side wiring terminal 120 mounted on the low-voltage side panel 11, one end of the first low-voltage side wiring terminal 115, the second low-voltage side wiring terminal 116, the third low-voltage side wiring terminal 117, the fourth low-voltage side wiring terminal 118, the fifth low-voltage side wiring terminal 119 and the sixth low-voltage side wiring terminal 120 being inside the cabinet 1 and the other end protruding from the low-voltage side panel 11;

[0039] The bushing terminal screen wiring terminals include a first bushing terminal screen wiring terminal 121, a second bushing terminal screen wiring terminal 122, a third bushing terminal screen wiring terminal 123 and a fourth bushing terminal screen wiring terminal 124 mounted on the low-voltage side panel 11, one end of the first bushing terminal screen wiring terminal 121, the second bushing terminal screen wiring terminal 122, the third bushing terminal screen wiring terminal 123 and the fourth bushing terminal screen wiring terminal 124 being inside the cabinet 1 and the other end protruding from the low-voltage side panel 11;

[0040] The low-voltage side grounding terminals include a first low-voltage side grounding terminal 111 and a second low-voltage side grounding terminal 114 mounted on the low-voltage side panel 11;

[0041] The air switches include a first air switch 112 and a second air switch 113 mounted on the low-voltage side panel 11, the first air switch 112 being used in conjunction with the low-voltage side wiring terminals and the second air switch 113 being used in conjunction with the bushing terminal screen wiring terminals;

[0042] The insulation auxiliary support includes a first support 3-1 and a second support 3-2 arranged in an up-down manner, the first support 3-1 and the second support 3-2 being installed inside the cabinet 1 in parallel to the high-voltage side panel 10, both ends of the first support 3-1 and the second support 3-2 being fixed on two sides of the cabinet 1 respectively;

[0043] One end of the short-circuit piece 4 is rotatably connected to the first support 3-1 through a conductive rotating rod, one end of the conductive rotating rod being movably mounted on the first support 3-1 and the other end being connected to the high-voltage side grounding terminal 105, the other end of the short-circuit piece 4 being provided with a protrusion movably arranged in a movable slot of the second support 3-2, and one end of the fourth high-voltage side wiring terminal 104 inside the cabinet 1 being located in the movable slot;

[0044] A long through hole for the insulation linkage rod to move is arranged on the top of the cabinet 1, one end of the insulation linkage rod being arranged outside the cabinet 1 and the other end extending into the cabinet 1 and being fixedly connected to one end of the short-circuit piece 4.

[0045] It should be noted that different test projects in the main transformer preventive test work involve different test connection modes. In the past, when carrying out transformer pre-test, because different test projects require different connection modes of the high-voltage lead-out points of the transformer on each side of the bushing, the end screen and the like, the staff needs to climb the transformer several times to change the test connection. The main transformer multi-port test connection device provided by the application, the first high-voltage side connection terminal 101, the second high-voltage side connection terminal 102, the third high-voltage side connection terminal 103 and the fourth high-voltage side connection terminal 104 on the high-voltage side panel 10 correspond to the A (phase), B (phase), C (phase) and O (phase) four bushings of the high-voltage side of the main transformer respectively, and the first high-voltage side connection column 106, the second high-voltage side connection column 107, the third high-voltage side connection column 108 and the fourth high-voltage side connection column 109 also correspond to the A (phase), B (phase), C (phase) and O (phase) four bushings of the high-voltage side of the main transformer respectively. The first high-voltage side connection terminal 101, the second high-voltage side connection terminal 102, the third high-voltage side connection terminal 103 and the fourth high-voltage side connection terminal 104 correspond to the first connection copper column 2-1, the second connection copper column 2-2, the third connection copper column 2-3 and the fourth connection copper column 2-4 respectively. The number of high-voltage side connection terminals is related to the actual use, and the user can increase or decrease the number of high-voltage side connection terminals during the design and manufacture of the device. In the embodiment of the application, two groups of high-voltage side connection terminals are provided, one group corresponds to the first high-voltage side connection terminal 101, the second high-voltage side connection terminal 102, the third high-voltage side connection terminal 103 and the fourth high-voltage side connection terminal 104, and the other group corresponds to the first high-voltage side connection column 106, the second high-voltage side connection column 107, the third high-voltage side connection column 108 and the fourth high-voltage side connection column 109, so as to provide a choice for actual use. In some test projects, the high-voltage lead-out points of the four high-voltage side bushings need to be short-circuited to ground, at this time, the high-voltage side ground terminal 105 can be grounded, the downlead of the high-voltage lead-out points of the four high-voltage side bushings is connected to the first high-voltage side connection terminal 101, the second high-voltage side connection terminal 102, the third high-voltage side connection terminal 103 and the fourth high-voltage side connection terminal 104, and the first connection copper column 2-1, the second connection copper column 2-2, the third connection copper column 2-3 and the fourth connection copper column 2-4 are short-circuited by using a short-circuit line and a connection clamp, so as to realize the short-circuit grounding of the high-voltage lead-out points of the four high-voltage side bushings on the ground. This function can also be used for discharging the equipment to ground after the high-voltage side winding and bushing test is completed, to protect the personal safety of the personnel who change the connection.

[0046] The high-voltage side grounding terminal 105, the first high-voltage side terminal 101, the second high-voltage side terminal 102, the third high-voltage side terminal 103 and the fourth high-voltage side terminal 104 are cross-shaped terminals, and the first high-voltage side terminal post 106, the second high-voltage side terminal post 107, the third high-voltage side terminal post 108 and the fourth high-voltage side terminal post 109 are plug-in terminals, which facilitate the direct current resistance test.

[0047] The first bushing terminal 121, the second bushing terminal 122, the third bushing terminal 123 and the fourth bushing terminal 124 correspond to the end screens of the A-phase, B-phase, C-phase and O-phase bushings of the high-voltage side of the main transformer, respectively. The first low-voltage side terminal 115, the second low-voltage side terminal 116 and the third low-voltage side terminal 117 on the low-voltage side panel 11 correspond to the A-phase, B-phase and C-phase bushings of the low-voltage side of the main transformer, respectively, and the fourth low-voltage side terminal 118, the fifth low-voltage side terminal 119 and the sixth low-voltage side terminal 120 also correspond to the A-phase, B-phase and C-phase bushings of the low-voltage side of the main transformer, respectively. The third low-voltage side terminal 117, the fourth low-voltage side terminal 118, the fifth low-voltage side terminal 119 and the sixth low-voltage side terminal 120 are plug-in terminals. The first bushing terminal 121, the second bushing terminal 122, the third bushing terminal 123 and the fourth bushing terminal 124 are plug-in terminals.

[0048] The insulation auxiliary support includes a first support 3-1 and a second support 3-2 arranged in an up-down manner, and the first support 3-1 and the second support 3-2 are installed in the box body 1 in parallel to the high-voltage side panel 10. The two ends of the first support 3-1 and the second support 3-2 are fixed on the two sides of the box body 1, respectively. One end of the short-circuit piece 4 is rotatably connected to the first support 3-1 through a conductive rotating rod, one end of the conductive rotating rod is movably installed on the first support 3-1, and the other end is connected to the high-voltage side grounding terminal 105. The other end of the short-circuit piece 4 is provided with a protrusion movably arranged in the movable slot of the second support 3-2, and one end of the fourth high-voltage side terminal 104 inside the box body 1 is located in the movable slot. A long through hole is arranged on the top of the box body 1 for the movement of an insulation linkage rod. One end of the insulation linkage rod is arranged outside the box body 1, and the other end extends into the box body 1 and is fixedly connected to one end of the short-circuit piece 4. A dust brush can be arranged in the long through hole, which can not only ensure the movement of the insulation linkage rod in the long through hole, but also prevent dust and other sundries from entering the box body 1 through the long through hole.

[0049] When it is needed to short the fourth high-voltage side terminal 104 and the high-voltage side ground terminal 105, the insulating linkage lever is pushed to drive the shorting piece 4 to rotate until the fourth high-voltage side terminal 104 and the high-voltage side ground terminal 105 are shorted, and the shorting of the fourth high-voltage side terminal 104 and the high-voltage side ground terminal 105 is realized. When it is needed to disconnect the fourth high-voltage side terminal 104 and the high-voltage side ground terminal 105, the insulating linkage lever is swung to drive the shorting piece 4 to be separated from the high-voltage side ground terminal 105, and the shorting is disconnected.

[0050] The first air switch 112 and the second air switch 113 are further arranged on the low-voltage side panel 11, the first air switch 112 is used to short a group of terminals and a grounding point, when it is needed to short the low-voltage side of the transformer to the ground, the first low-voltage side terminal 115, the second low-voltage side terminal 116 and the third low-voltage side terminal 117 (or the fourth low-voltage side terminal 118, the fifth low-voltage side terminal 119 and the sixth low-voltage side terminal 120) are shorted by the test wire, the first low-voltage side ground terminal 111 is grounded, the first air switch 112 is closed to connect the first low-voltage side terminal 115, the second low-voltage side terminal 116 and the third low-voltage side terminal 117 (or the fourth low-voltage side terminal 118, the fifth low-voltage side terminal 119 and the sixth low-voltage side terminal 120) to the first low-voltage side ground terminal 111. In actual use, the user can control the first air switch 112 according to the actual situation, and the use flexibility of the whole device is improved. The second air switch 113 is used to short a group of terminals and a grounding point, when it is needed to short the high-voltage side bushing end screen of the transformer to the ground, the first bushing end screen terminal 121, the second bushing end screen terminal 122, the third bushing end screen terminal 123 and the fourth bushing end screen terminal 124 are shorted by the test wire, the second low-voltage side ground terminal 114 is grounded, and the second air switch 113 is closed to connect the first bushing end screen terminal 121, the second bushing end screen terminal 122, the third bushing end screen terminal 123 and the fourth bushing end screen terminal 124 to the second low-voltage side ground terminal 114.

[0051] An insulating handle can be further arranged on the top of the box body 1, so that the external structure of the main transformer multi-port test wiring device is a hand-held box with a handle, and the main transformer multi-port test wiring device is convenient to carry.

[0052] The main transformer multi-port test wiring device provided by the application is used, a worker carries test wires to climb to the main transformer, and wiring is performed. The test wires are 18 in total, one end of each test wire is a crocodile clip, and the other end is a banana plug. The test wires are respectively clamped to:

[0053] (1) High-voltage side A, B, C, O four sleeve high-voltage outgoing line, two roots, respectively, the first high-voltage side terminal 101, the second high-voltage side terminal 102, the third high-voltage side terminal 103 and the fourth high-voltage side terminal 104, and the first high-voltage side terminal 106, the second high-voltage side terminal 107, the third high-voltage side terminal 108 and the fourth high-voltage side terminal 109;

[0054] (2) Remove the high-voltage side A, B, C, O four sleeve end screen grounding, and the end screen test line clamp, the other end into the first sleeve end screen terminal 121, the second sleeve end screen terminal 122, the third sleeve end screen terminal 123 and the fourth sleeve end screen terminal 124;

[0055] (3) Low-voltage side A, B, C three-phase high-voltage outgoing line, two roots, respectively, into the first low-voltage side terminal 115, the second low-voltage side terminal 116, the third low-voltage side terminal 117, the fourth low-voltage side terminal 118, the fifth low-voltage side terminal 119 and the sixth low-voltage side terminal 120.

[0056] When the main transformer sleeve capacitance and dielectric loss test, the high-voltage side of the first terminal 2-1, the second terminal 2-2, the third terminal 2-3 and the fourth terminal 2-4 are short-circuited by short-circuiting, and the first low-voltage side terminal 115, the second low-voltage side terminal 116, the third low-voltage side terminal 117, the fourth low-voltage side terminal 118, the fifth low-voltage side terminal 119 and the sixth low-voltage side terminal 120 are short-circuited and grounded through the first air switch 112. The dielectric loss instrument high-voltage clamp is placed on the first terminal 2-1, the second terminal 2-2, the third terminal 2-3 and the fourth terminal 2-4, and the low-voltage signal line is connected to the corresponding end screen point on the device. Disconnect the insulation linkage rod (i.e. disconnect the high-voltage side terminal 105 and the fourth high-voltage side terminal 104 from the short-circuit state) and the second air switch 113, and the test can be performed. After the test, the device can be discharged by closing the insulation linkage rod (i.e. short-circuiting the high-voltage side terminal 105 and the fourth high-voltage side terminal 104) and the second air switch 113. And always keep the second air switch 113 in the closed state, that is, restore the end screen grounding.

[0057] When the main transformer insulation test is performed, the high-voltage side first connection copper column 2-1, the second connection copper column 2-2, the third connection copper column 2-3 and the fourth connection copper column 2-4 are short-circuited by using short-circuit wires, and the first low-voltage side connection terminal 115, the second low-voltage side connection terminal 116, the third low-voltage side connection terminal 117, the fourth low-voltage side connection terminal 118, the fifth low-voltage side connection terminal 119 and the sixth low-voltage side connection terminal 120 are short-circuited and grounded through the first air switch 112. At this time, the first connection copper column 2-1, the second connection copper column 2-2, the third connection copper column 2-3 and the fourth connection copper column 2-4 can be pressurized by using a test instrument, and after pressurization is completed, discharge is performed by closing the insulation linkage lever. When the high-voltage side body insulation is performed, the first air switch 112 is opened, the insulation linkage lever is kept in the closed state, and the low-voltage side connection terminal is pressurized; when the main insulation measurement of the bushing is performed, the second air switch 113 is opened, and the first high-voltage side connection terminal 101, the second high-voltage side connection terminal 102, the third high-voltage side connection terminal 103 and the fourth high-voltage side connection terminal 104, the first bushing end screen connection terminal 121, the second bushing end screen connection terminal 122, the third bushing end screen connection terminal 123 and the fourth bushing end screen connection terminal 124 are pressurized between the same phase and different connection terminals to measure the main insulation of the bushing.

[0058] When the DC resistance test is performed, all ground switches, i.e., the high-voltage side ground terminal 105, the first low-voltage side ground terminal 111 and the second low-voltage side ground terminal 114, are opened, and all short-circuit wires are removed. When the high-voltage winding DC resistance is measured, the DC resistance instrument can be used to connect the voltage line of the ABC three-phase and neutral point bushing to the first high-voltage side connection column 106, the second high-voltage side connection column 107, the third high-voltage side connection column 108 and the fourth high-voltage side connection column 109, and the current line is connected to the first high-voltage side connection terminal 101, the second high-voltage side connection terminal 102, the third high-voltage side connection terminal 103 and the fourth high-voltage side connection terminal 104. When the low-voltage winding DC resistance is measured, the first low-voltage side connection terminal 115, the second low-voltage side connection terminal 116, the third low-voltage side connection terminal 117, the fourth low-voltage side connection terminal 118, the fifth low-voltage side connection terminal 119 and the sixth low-voltage side connection terminal 120 can be used, and the left side is connected to the ABC three-phase voltage line, and the right side is connected to the current line.

[0059] After all test items are completed, the staff climbs the main transformer body, removes all connections and restores the grounding of the end screen.

[0060] The main transformer multi-port test connection device provided by the application simplifies high-altitude work, transfers the workload of high-altitude work to the ground, reduces repeated climbing and high-altitude work time, and controls the high-altitude work time within 15 minutes.

[0061] The main transformer multi-port test wiring device provided by the application integrates the high-voltage side wiring terminal, the high-voltage side terminal post, the low-voltage side wiring terminal, the high-voltage side grounding terminal 105, the low-voltage side grounding terminal, the air switch, the bushing end screen wiring terminal and the wiring copper post on the box body 1 of the main transformer multi-port test wiring device, and realizes the short circuit and disconnection of the high-voltage side grounding terminal 105 and the fourth high-voltage side wiring terminal 104 through the cooperation and linkage of the insulation auxiliary support, the short circuit piece 4 and the insulation linkage rod, so that the staff does not need to climb the transformer multiple times, only needs to climb twice to complete the assembly and disassembly work of all test wiring, places the down lead on the main transformer multi-port test wiring device, and changes the wiring mode according to the test project and connects the test instrument to complete the DC resistance test, the insulation resistance test and the bushing capacitance dielectric loss test, thereby simplifying the high-altitude work, making the high-altitude test work simple, efficient and safe, and solving the technical problems that the staff needs to climb the transformer multiple times to change the test wiring when the main transformer preventive test is performed in the prior art, which not only has safety hazards, but also greatly increases the test time.

[0062] In one embodiment, the main transformer multi-port test wiring device provided by the application further includes a movable caster with a brake, which is detachably installed at the four corners of the bottom of the box body 1. The movable caster with a brake can facilitate the movement and transportation of the entire main transformer multi-port test wiring device. When the movable caster with a brake is not needed, it can be detached.

[0063] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than limit them; although the foregoing embodiments of the present application have been described in detail, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for some technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A multi-port test wiring device for a main transformer, characterized in that, Includes enclosure, high-voltage side terminals, high-voltage side terminals, low-voltage side terminals, high-voltage side grounding terminals, low-voltage side grounding terminals, air switch, bushing end panel terminals, wiring copper posts, insulating auxiliary brackets, shorting components, and insulating linkage rods; The two opposite sides of the enclosure are the high-pressure side panel and the low-pressure side panel, respectively. The high-voltage side wiring terminal includes a first high-voltage side wiring terminal, a second high-voltage side wiring terminal, a third high-voltage side wiring terminal and a fourth high-voltage side wiring terminal installed on the high-voltage side panel. One end of the first high-voltage side wiring terminal, the second high-voltage side wiring terminal, the third high-voltage side wiring terminal and the fourth high-voltage side wiring terminal are inside the enclosure, and the other end protrudes from the high-voltage side panel. The wiring copper posts include a first wiring copper post, a second wiring copper post, a third wiring copper post, and a fourth wiring copper post installed on the high-voltage side panel. One end of the first wiring copper post, the second wiring copper post, the third wiring copper post, and the fourth wiring copper post are inside the enclosure, and the other end protrudes from the high-voltage side panel. The first wiring copper post is electrically connected to the first high-voltage side terminal, the second wiring copper post is electrically connected to the second high-voltage side terminal, the third wiring copper post is electrically connected to the third high-voltage side terminal, and the fourth wiring copper post is electrically connected to the fourth high-voltage side terminal. The high-voltage side terminal includes a first high-voltage side terminal, a second high-voltage side terminal, a third high-voltage side terminal, and a fourth high-voltage side terminal installed on the high-voltage side panel. One end of the first high-voltage side terminal, the second high-voltage side terminal, the third high-voltage side terminal, and the fourth high-voltage side terminal is inside the enclosure, and the other end protrudes from the high-voltage side panel. The high-voltage side grounding terminal is installed on the high-voltage side panel; The low-voltage side terminal block includes a first low-voltage side terminal block, a second low-voltage side terminal block, a third low-voltage side terminal block, a fourth low-voltage side terminal block, a fifth low-voltage side terminal block, and a sixth low-voltage side terminal block installed on the low-voltage side panel. One end of the first low-voltage side terminal block, the second low-voltage side terminal block, the third low-voltage side terminal block, the fourth low-voltage side terminal block, the fifth low-voltage side terminal block, and the sixth low-voltage side terminal block is inside the enclosure, and the other end protrudes from the low-voltage side panel. The bushing end panel terminal includes a first bushing end panel terminal, a second bushing end panel terminal, a third bushing end panel terminal and a fourth bushing end panel terminal installed on the low-voltage side panel. One end of the first bushing end panel terminal, the second bushing end panel terminal, the third bushing end panel terminal and the fourth bushing end panel terminal are inside the enclosure, and the other end protrudes from the low-voltage side panel. The low-voltage side grounding terminal includes a first low-voltage side grounding terminal and a second low-voltage side grounding terminal installed on the low-voltage side panel; The circuit breaker includes a first circuit breaker and a second circuit breaker installed on the low-voltage side panel. The first circuit breaker is used in conjunction with the low-voltage side terminal block, and the second circuit breaker is used in conjunction with the bushing end panel terminal block. The insulation auxiliary support includes a first support and a second support arranged vertically. The first support and the second support are installed inside the enclosure parallel to the high-voltage side panel. The two ends of the first support and the second support are respectively fixed to the two sides of the enclosure. One end of the shorting connector is rotatably connected to the first bracket via a conductive rotating rod. One end of the conductive rotating rod is movably mounted on the first bracket, and the other end is connected to the high-voltage side grounding terminal. The other end of the shorting connector is provided with a protrusion, which is movably disposed in the movable groove of the second bracket. One end of the fourth high-voltage side wiring terminal is located in the movable groove inside the housing. The top of the box is provided with a long through hole for the movement of the insulating linkage rod. One end of the insulating linkage rod is located outside the box, and the other end extends into the box and is fixedly connected to one end of the short connector.

2. The multi-port test wiring device for main transformers according to claim 1, characterized in that, It also includes swivel casters with brakes; The movable casters with brakes are detachably installed at the four corners of the bottom of the box.

3. The multi-port test wiring device for main transformers according to claim 1, characterized in that, The high-voltage side grounding terminal, the first high-voltage side wiring terminal, the second high-voltage side wiring terminal, the third high-voltage side wiring terminal and the fourth high-voltage side wiring terminal are cross-shaped wiring terminals, and the first high-voltage side wiring post, the second high-voltage side wiring post, the third high-voltage side wiring post and the fourth high-voltage side wiring post are plug-in type wiring terminals.

4. The multi-port test wiring device for main transformers according to claim 1, characterized in that, The first low-voltage side terminal, the second low-voltage side terminal, the third low-voltage side terminal, the fourth low-voltage side terminal, the fifth low-voltage side terminal, and the sixth low-voltage side terminal are plug-in type terminals.

5. The multi-port test wiring device for main transformers according to claim 1, characterized in that, A dustproof brush is installed inside the through hole.

6. The multi-port test wiring device for main transformers according to claim 1, characterized in that, An insulated handle is installed on the top of the enclosure.

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