CN210775567U

CN210775567U - Wiring device for main transformer detection test

Info

Publication number: CN210775567U
Application number: CN201920546282.3U
Authority: CN
Inventors: 龙翱翔; 孙承祥; 石磊; 吴定亮
Original assignee: Guizhou Power Grid Co Ltd
Current assignee: Guizhou Power Grid Co Ltd
Priority date: 2019-04-22
Filing date: 2019-04-22
Publication date: 2020-06-16
Anticipated expiration: 2029-04-22

Abstract

The utility model relates to a wiring device for main transformer detection test, which relates to the technical field of main transformer detection equipment and comprises a box body, a box door arranged on one side of the box body, a wiring board arranged on the other side of the box body and an insulating board arranged in the box body, wherein a plurality of wiring terminals penetrating through the wiring board are arranged on the wiring board; one end of the binding post extending into the box body is connected with a connecting wire; the wiring terminals comprise a high-voltage wiring terminal, a medium-voltage wiring terminal and a low-voltage wiring terminal; the insulating plate separates the high-voltage wiring terminal, the medium-voltage wiring terminal and the low-voltage wiring terminal. The utility model discloses a termination for main transformer test with each junction of main transformer and the terminal connection of wiring board, rethread terminal connection main transformer's test equipment has avoided the workman to scramble the switching wiring mode on the main transformer repeatedly, simplifies test process, saving test time, has also reduced the potential safety hazard of workman's round trip climbing main transformer.

Description

Wiring device for main transformer detection test

Technical Field

The utility model relates to a main transformer check out test set technical field especially relates to a termination for main transformer test.

Background

The main transformer is the most important power equipment in the power system, and is the electrical equipment for transmitting electric energy and converting voltage and current, and the main transformer generally has a large capacity and requires high reliability in operation. Although the failure rate of the main transformer is not high, the main transformer causes great loss once the failure occurs, and equipment failure can be caused if the main transformer fails; the method is characterized in that a fire condition can be caused seriously, and the normal transportation safety is endangered, so that a routine test is carried out on the method in daily life, the method is a basic requirement for technical supervision of power equipment, is an important component of the whole process management work of the power equipment, and is an important guarantee for long-term safe and economic operation of the power equipment, the detected content comprises the items of winding deformation, winding direct-current resistance, winding insulation resistance and absorption ratio, dielectric loss tg delta and capacitance of a winding and a sleeve, and different detection items relate to different wiring modes and test equipment, a worker needs to frequently climb up a main transformer to switch the wiring mode and needs to ground a non-test winding, the worker climbs back and forth, so that safety accidents easily occur, and time is wasted; frequent wiring and grounding operations on the main transformer easily cause accidental discharge, and personal safety is affected.

SUMMERY OF THE UTILITY MODEL

The utility model provides a solve above-mentioned technical problem and provide a termination for main transformer test, with the terminal connection of each tie point of main transformer and wiring board, the test equipment of rethread terminal connection main transformer has avoided the workman to scramble to the main transformer and switch the mode of connection on repeatedly, once connects all connecting wire, can be subaerial carry out each item experimental, simplifies test process, practices thrift test time, has also reduced the workman and has made a round trip to scramble the potential safety hazard of main transformer.

The utility model provides an above-mentioned technical problem's technical scheme as follows: a wiring device for a main transformer detection test comprises a box body, a box door arranged on one side of the box body, a wiring board arranged on the other side of the box body and an insulating board arranged in the box body, wherein a plurality of wiring terminals penetrating through the wiring board are arranged on the wiring board; and one end of the binding post extending into the box body is connected with a connecting wire. During the use, the chamber door is opened, the terminal passes through connecting wire and is connected with the tie point on the main transformer respectively, and test equipment stretches out box one end with the terminal and is connected, realizes the electricity of test equipment and main transformer tie point and is connected. The wiring terminal is divided into a high-voltage wiring terminal, a medium-voltage wiring terminal and a low-voltage wiring terminal according to a voltage interval connected with a main transformer connection point; the high-voltage wiring terminal, the medium-voltage wiring terminal and the low-voltage wiring terminal are arranged in 3 or three parallel rows. Gaps are reserved among the high-voltage wiring terminal, the medium-voltage wiring terminal and the low-voltage wiring terminal, so that the high-voltage wiring terminal, the medium-voltage wiring terminal and the low-voltage wiring terminal are separated, and discharge among the wiring terminals is reduced.

The insulating plate comprises a first insulating plate and a second insulating plate which separate the high-voltage wiring terminal, the medium-voltage wiring terminal and the low-voltage wiring terminal. First insulation board and second insulation board are cut apart the box into three mutually independent region, make the connecting wire who connects high-voltage terminal, middling pressure terminal and low-voltage connection terminal separate in the box, avoid high-voltage terminal, middling pressure wiring and low-voltage connection terminal's connecting wire winding, can also avoid connecting between the connecting wire of different voltage intervals and discharge each other.

The utility model discloses a terminal on connecting wire and the wiring board is connected the tie point on with the main transformer with the test equipment electricity is connected, realizes once passing through connecting wire and terminal connection back with the tie point on the main transformer, can subaerial carry out various main transformer tests, has avoided the workman to scramble the potential safety hazard that the manpower wasting of resources, inefficiency and climbing many times main transformer that the transform wiring caused repeatedly on the main transformer brought. Still separate high-voltage terminal, middling pressure terminal, low pressure terminal and the connecting wire who connects high-voltage terminal, middling pressure terminal, low pressure terminal respectively simultaneously through first insulation board and second insulation board, make it be located three mutually independent space respectively, avoid discharging each other between the connecting wire of each voltage interval, can also avoid connecting wire intertwine.

Preferably, high voltage terminal, middling pressure terminal and low pressure terminal are 3 lines of at interval and distribute, first insulation board and second insulation board are the level setting that is parallel to each other, make connecting wire be located the box inside part and can directly put on the bottom plate of first insulation board or second insulation board or box, further avoid connecting wire's intertwine.

Further, the box door and the wiring board are correspondingly arranged, namely: the box body is rectangular, the surface where the wiring board is located is not adjacent to the surface where the box door is located, and therefore after connecting wires are connected well, the connecting relationship between the connecting wires and the wiring posts can be observed through the box door.

Furthermore, first insulation board and second insulation board are connected with the box can be dismantled, make it can realize the dismantlement installation of first insulation board and second insulation board, the termination's of being convenient for routine maintenance and washing.

Furthermore, the wiring device also comprises a grounding device which is arranged on the wiring board and positioned on the outer surface of the box body, wherein the grounding device comprises a conductor aluminum plate, a plurality of connecting conductors one-to-one connected with the connecting column at one end and a plurality of bolts which penetrate through the conductor aluminum plate and are in threaded connection with the conductor aluminum plate; the connecting conductors and the bolts are arranged in a one-to-one mode, and one ends, far away from the connecting columns, of the connecting conductors extend to the lower portions of the screws of the bolts; the conductor aluminum plate is not contacted with the binding post; when the wiring device is used, the conductor aluminum plate is grounded; the screw rod of the bolt is made of conductive metal materials, such as metal copper, metal aluminum, metal iron and the like.

In the main transformer detection test process, each wiring terminal on the wiring board is not necessarily connected with all test equipment. Grounding is required when the terminals are not connected to the test equipment. Because of the multiple tests, it is necessary to frequently change the grounding of the posts on the terminal block.

The utility model discloses a screw in or screw out and conductor aluminum plate threaded connection's bolt makes the screw rod of bolt and the connecting conductor contact or contactless of connecting the terminal, realizes connecting conductor and conductor aluminum plate's electric connection or do not throw out, realizes then whether the ground connection of terminal, realizes whether the tie point ground connection that main transformer corresponds, makes the terminal ground connection state that the change that the staff can be quick passes through connecting wire with the tie point of main transformer and is connected, improves work efficiency.

Further, the conductor aluminum plates include a transverse conductor aluminum plate and a longitudinal conductor aluminum plate. The transverse conductor aluminum plate comprises a first aluminum plate, a second aluminum plate and a third aluminum plate which respectively correspond to the high-voltage binding post, the medium-voltage binding post and the low-voltage binding post; namely, a row formed by the first aluminum plate corresponding to the high-voltage wiring terminal is arranged into a strip shape parallel to the row of the high-voltage wiring terminal; a row formed by the second aluminum plate corresponding to the medium-voltage wiring terminal is arranged to be a long strip parallel to the row of the medium-voltage wiring terminal; and a row formed by the third aluminum plate corresponding to the mortgage binding posts is a strip shape parallel to the row of the low-voltage binding posts. The border setting that longitudinal conductor aluminum plate is close to the wiring board and be connected with first aluminum plate, second aluminum plate and third aluminum plate's one end, the wiring board is worn out to longitudinal conductor aluminum plate's one end and is carried out ground connection. The connecting conductor is in a strip shape, and one end of the connecting conductor is connected with the wiring terminal; the other end of the connecting conductor is close to the corresponding transverse conductor aluminum plate and is electrically connected with the conductor aluminum plate through the screwed bolt. The adjacent connecting conductors are parallel to each other, so that the connecting conductors are electrically connected or disconnected with the conductor aluminum plate through screwing in or screwing out of the bolts, and the grounding or non-grounding of each wiring point of the main transformer is realized.

Furthermore, the grounding device also comprises an insulating protective cover arranged on the wiring board, the conductor aluminum plate is arranged in the insulating protective cover, and the head of the bolt extends out of the insulating protective cover; and one end of the connecting conductor, which is far away from the conductor aluminum plate, extends out of the insulating protective cover to be connected with the wiring terminal. The shape of insulating safety cover and conductor aluminum plate is unanimous, makes it can cover and establish outside conductor aluminum plate in order to reach the effect that plays insulating protection to conductor aluminum plate and conductor aluminum plate, bolt, connecting conductor's junction.

Furthermore, the head of the bolt is provided with an insulating sleeve, and the process of rotating the bolt is in contact with the head provided with the insulating sleeve, so that the insulating effect is achieved, and potential safety hazards caused by accidental discharge are avoided.

Further, when the chamber door was closed, the box was provided with the sealing washer with the place of chamber door contact, avoided connecting wire to wet in the box, led to connecting wire and terminal's coupling part ageing.

The insulating protective cover, the insulating plate and the insulating sleeve are made of insulating materials.

The utility model has the advantages that: (1) the utility model discloses a termination for main transformer test with each junction of main transformer and the terminal connection of wiring board, the test equipment of rethread terminal connection main transformer has avoided the workman to scramble to the main transformer and has switched the mode of connection on, once connects all connecting wire, can subaerial carry out each item experiment, simplifies test process, practices thrift test time, has also reduced the workman and has made a round trip to scramble the potential safety hazard of main transformer.

(2) The utility model discloses a termination for main transformer test will connect the high-voltage terminal, middling pressure terminal, the low pressure terminal of different voltage intervals through first insulation board and second insulation board and separate with high-voltage terminal, middling pressure terminal, low pressure terminal connection's connecting wire respectively and come, avoids the connecting wire winding of high-voltage terminal, middling pressure wiring and low pressure terminal, can also avoid connecting between the connecting wire of different voltage intervals and discharge mutually.

(3) The utility model discloses a termination for main transformer test still is provided with earthing device, through screw in or screw out and conductor aluminum plate threaded connection's bolt, the connecting conductor contact or the contactless of the screw rod that makes the bolt and connection terminal, realize connecting conductor and conductor aluminum plate's electric connection or do not connect, realize then whether the ground connection of terminal, whether the tie point ground connection that realizes main transformer and correspond, the terminal ground state that the tie point that makes the change that the staff can be quick passes through connecting wire with main transformer's tie point is connected improves work efficiency.

Drawings

Fig. 1 is a schematic structural diagram of a wiring device for a main transformer test of the present invention;

fig. 2 is a schematic diagram of a wiring board structure of a wiring device for a main transformer detection test according to the present invention;

fig. 3 is a schematic structural diagram of a wiring device of the wiring device for the main transformer detection test of the present invention;

in the drawings, the components represented by the respective reference numerals are listed below:

1-box body, 2-box door, 3-wiring board, 31-wiring terminal, 311-high voltage wiring terminal, 312-medium voltage wiring terminal, 313-low voltage wiring terminal, 4-insulating board, 5-grounding device, 51-conductor aluminum plate, 52-connecting conductor, 53-bolt and 54-insulating protective cover.

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

In the following embodiments, the bolt 53 is a universal bolt made of a metal material that can be used as a conductor, and includes a head for screwing and a screw for fastening, and the screw is located below the head.

The utility model provides a test equipment is the equipment of test main transformer, and its structure, model are not all the utility model discloses the innovation point of modified, consequently the utility model discloses in carry out the detail one by one to test equipment's structure, model.

Example 1

As shown in fig. 1 and 2, the wiring device for the main transformer detection test disclosed in this embodiment includes a box body 1, a box door 2 disposed on one side of the box body 1, a wiring board 3 disposed on the other side of the box body 1, and an insulating board 4 disposed in the box body 1, wherein a plurality of wiring terminals 31 penetrating through the wiring board 3 are disposed on the wiring board 3; and one end of the binding post 31 extending into the box body 1 is connected with a connecting wire. During the use, chamber door 2 is opened, terminal 31 is connected with the tie point on the main transformer through connecting wire respectively, and test equipment is connected with terminal 31 and stretches out 1 one end of box, realizes the electricity of test equipment and main transformer tie point and connects. The binding post 31 is divided into a high-voltage binding post 311, a medium-voltage binding post 312 and a low-voltage binding post 313 according to a voltage interval connected with a main transformer connecting point; the high voltage post 311, the medium voltage post 312, and the low voltage post 313 are arranged in 3 or three parallel rows. Gaps are reserved among the high-voltage binding post 311, the medium-voltage binding post 312 and the low-voltage binding post 313, so that the high-voltage binding post 311, the medium-voltage binding post 312 and the low-voltage binding post 313 are separated, and discharge among the binding posts 31 is reduced.

The insulating plate 4 includes a first insulating plate and a second insulating plate that separate the high voltage post 311, the medium voltage post 312, and the low voltage post 313. The first insulating plate and the second insulating plate divide the box body 1 into three mutually independent areas, so that connecting wires for connecting the high-voltage wiring terminal 311, the medium-voltage wiring terminal 312 and the low-voltage wiring terminal 313 are separated in the box body 1, the connecting wires for connecting the high-voltage wiring terminal 311, the medium-voltage wiring terminal and the low-voltage wiring terminal 313 are prevented from being wound, and mutual discharging between the connecting wires for connecting different voltage intervals can be avoided.

The working principle is as follows: when main transformer need carry out the testing, will the utility model discloses a termination installs on near ground or the support body of main transformer, then opens chamber door 2, on the tie point that once only is connected to main transformer with connecting wire, then passes through the wire electricity with the one end that test equipment and terminal 31 stretch out box 1 and is connected, can carry out the testing. Different terminals 31 are connected according to different items of required detection tests to accomplish different detection tests, avoid because the items of detection tests are different, need connect different tie points on the main transformer, make the staff climb repeatedly on the main transformer and go up the line, influence detection test efficiency, extravagant manpower, also increased the potential safety hazard simultaneously. After the detection test is finished, the worker can take down all the connecting wires connected to the connecting point of the main transformer at one time.

Preferably, the high voltage terminals 311, the medium voltage terminals 312 and the low voltage terminals 313 are distributed in 3 rows at intervals, and the first insulating plate and the second insulating plate are horizontally arranged in parallel to each other, so that the connecting wires located in the box 1 can be directly placed on the first insulating plate or the second insulating plate or the bottom plate of the box 1, and further, the mutual winding of the connecting wires is avoided.

Preferably, the box door 2 and the wiring board 3 are correspondingly arranged, that is, the box body 1 is rectangular, and the surface where the wiring board 3 is located is not adjacent to the surface where the box door 2 is located, so that after the connecting wires are connected, the connecting relationship between the connecting wires and the wiring terminals 31 can be observed through the box door 2.

Preferably, when the box door 2 is closed, a sealing ring is arranged at a contact position between the box body 1 and the box door 2, so that the phenomenon that a connecting wire in the box body 1 is affected with damp, and the connecting part between the connecting wire and the binding post 31 is aged is avoided.

Example 2

The embodiment is improved on the basis of embodiment 1, and the improvement is as follows: first insulation board and second insulation board are connected with box 1 can dismantle, make it can realize the dismantlement installation of first insulation board and second insulation board, the termination's of being convenient for routine maintenance and washing.

The first insulating plate and the second insulating plate are detachably connected with the box body 1 through buckles or screws.

When the first insulating plate and the second insulating plate are detachably connected with the box body 1 through the buckles, a plurality of clamping rings are arranged on the inner side walls of the box body 1, which are positioned on the left side and the right side of the wiring board 3, and the ring surfaces of the clamping rings are perpendicular to the wiring board 3; the snap rings are arranged in two rows corresponding to the first insulating plate and the second insulating plate. The lower surfaces of the first insulating plate and the second insulating plate are provided with limiting blocks protruding downwards, the limiting blocks can be embedded into the middle through holes of the clamping rings, and the first insulating plate and the second insulating plate are connected with the buckle of the box body 1. The limiting block is preferably provided with an arc-shaped hook bent towards the first insulating plate or the second insulating plate at one end far away from the first insulating plate or the second insulating plate.

When the first insulating plate and the second insulating plate are detachably connected with the box body 1 through screws, a plurality of mounting blocks are arranged on the inner side walls of the box body 1 at the left side and the right side of the wiring board 3, and the mounting blocks are arranged in two rows corresponding to the first insulating plate and the second insulating plate; and threaded holes are formed in the mounting blocks. The corresponding mounting blocks on the first insulating plate and the second insulating plate are provided with through holes, when the first insulating plate and the second insulating plate are mounted in the box body 1, the axial direction of the corresponding threaded hole and the axial line of the through hole are on the same straight line. The first insulating plate and the second insulating plate are detachably connected with the box body 1 through a plurality of screws penetrating through the through holes and connected with the threaded holes through threads.

Other parts in this embodiment are substantially the same as those in embodiment 1, and therefore are not described in detail.

Example 3

The embodiment is improved on the basis of the embodiment 2, and the improvement is as follows: as shown in fig. 2 and 3, the wiring device further comprises a grounding device 5 which is arranged on the wiring board 3 and is positioned on the outer surface of the box body 1, wherein the grounding device 5 comprises a conductor aluminum plate 51, a plurality of connecting conductors 52 with one end connected with the connecting column in a one-to-one manner, and a plurality of bolts 53 which penetrate through the conductor aluminum plate 51 and are in threaded connection with the conductor aluminum plate 51; the connecting conductors 52 and the bolts 53 are arranged in a one-to-one manner, and one end of each connecting conductor 52, which is far away from the connecting column, extends to the position below the screw of each bolt 53; the conductor aluminum plate 51 is not in contact with the terminal 31; when the wiring device is used, the conductor aluminum plate 51 is grounded; the screw of the bolt 53 is made of conductive metal material, such as metal copper, metal aluminum, metal iron, and the like.

The conductor aluminum plates 51 include a transverse conductor aluminum plate and a longitudinal conductor aluminum plate. The transverse conductor aluminum plate comprises a first aluminum plate, a second aluminum plate and a third aluminum plate which respectively correspond to the high-voltage binding post 311, the medium-voltage binding post 312 and the low-voltage binding post 313; namely, a row formed by the first aluminum plate corresponding to the high-voltage wiring terminal 311 is arranged to be a long strip parallel to the row where the high-voltage wiring terminal 311 is located; a row formed by the second aluminum plate corresponding to the medium-voltage binding posts 312 is arranged to be a long strip parallel to the row of the medium-voltage binding posts 312; the row of the third aluminum plate corresponding to the mortgage binding post 31 is arranged into a strip shape parallel to the row of the low-voltage binding post 313. The border setting that longitudinal conductor aluminum plate is close to wiring board 3 and is connected with first aluminum plate, second aluminum plate and third aluminum plate's one end, longitudinal conductor aluminum plate's one end is worn out wiring board 3 and is carried out ground connection. The connecting conductor 52 is in a strip shape, and one end of the connecting conductor 52 is connected with the binding post 31; the other end of the connecting conductor 52 is close to the corresponding transverse conductor aluminum plate and is electrically connected with the conductor aluminum plate 51 through a screwed bolt 53. The adjacent connecting conductors 52 are parallel to each other, so that the connecting conductors 52 are electrically connected or disconnected with the aluminum conductor plate 51 by screwing or unscrewing the bolts 53, and the grounding or non-grounding of each connection point of the main transformer is realized.

The working principle is as follows: when the binding post 31 needs to be grounded, screwing the bolt 53 corresponding to the binding post 31, and screwing the screw of the bolt 53 downwards until the bolt is contacted with the connecting conductor 52 connected with the binding post 31, so that the binding post 31 is grounded through the connecting conductor 52, the bolt 53 and the conductor aluminum plate 51; when the terminal 31 does not need to be grounded, the bolt 53 corresponding to the terminal 31 is screwed out upwards, the screw of the bolt 53 is screwed out upwards until the bolt is not in contact with the connecting conductor 52 connected with the terminal 31, and the connecting conductor 52 is disconnected from the conductor aluminum plate 51, so that the terminal 31 is not grounded.

Other parts in this embodiment are substantially the same as those in embodiment 1 or 2, and therefore are not described in detail.

Example 4

The embodiment is improved on the basis of the embodiment 3, and the improvement is that: as shown in fig. 2, the grounding device 5 further includes an insulating protective cover 54 mounted on the wiring board 3, the conductor aluminum plate 51 is mounted in the insulating protective cover 54, and the head of the bolt 53 extends out of the insulating protective cover 54; one end of the connecting conductor 52 far away from the conductor aluminum plate 51 extends out of the insulating protective cover 54 to be connected with the terminal 31. The insulating protective cover 54 is in accordance with the shape of the conductor aluminum plate 51, so that the insulating protective cover can cover the conductor aluminum plate 51 to achieve the effect of insulating and protecting the connection part of the conductor aluminum plate 51, the bolt 53 and the connecting conductor 52.

Preferably, the head of bolt 53 is equipped with insulating cover, and the in-process of rotating bolt 53 contacts with the head that is provided with insulating cover, reaches insulating effect, avoids unexpected discharge to cause the potential safety hazard.

Other parts in this embodiment are substantially the same as those in embodiment 3, and thus are not described in detail.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. The utility model provides a termination for main transformer test which characterized in that: the box comprises a box body (1), a box door (2) arranged on one side of the box body (1), a wiring board (3) arranged on the other side of the box body (1) and an insulating board (4) arranged in the box body (1), wherein a plurality of wiring terminals (31) penetrating through the wiring board (3) are arranged on the wiring board (3); one end of the binding post (31) extending into the box body (1) is connected with a connecting wire; the binding posts (31) comprise a high-voltage binding post (311), a medium-voltage binding post (312) and a low-voltage binding post (313); the high-voltage binding post (311), the medium-voltage binding post (312) and the low-voltage binding post (313) are arranged in 3 rows or three rows which are parallel to each other; the insulating plate (4) comprises a first insulating plate and a second insulating plate; the first insulating plate and the second insulating plate separate a high-voltage binding post (311), a medium-voltage binding post (312), a low-voltage binding post (313) and connecting wires respectively connected with the high-voltage binding post (311), the medium-voltage binding post (312) and the low-voltage binding post (313).

2. A wiring device for main transformer test according to claim 1, characterized in that the box door (2) and the wiring board (3) are correspondingly arranged.

3. The wiring device for main transformer detection test according to claim 2, wherein the first insulating plate and the second insulating plate are detachably connected with the box body (1).

4. A wiring device for a main transformer detection test according to any one of claims 1 to 3, further comprising a grounding device (5) arranged on the wiring board (3) and located on the outer surface of the box body (1), wherein the grounding device (5) comprises a conductor aluminum plate (51), a plurality of connecting conductors (52) with one end connected with the connecting column in a one-to-one manner, and a plurality of bolts (53) penetrating through the conductor aluminum plate (51) and in threaded connection with the conductor aluminum plate (51); the connecting conductors (52) and the bolts (53) are arranged in a one-to-one mode, and one end, far away from the connecting column, of each connecting conductor (52) extends to the position below the screw of each bolt (53); the conductor aluminum plate (51) is not in contact with the binding post (31); when the wiring device is used, the conductor aluminum plate (51) is grounded.

5. The wiring device for main transformer test according to claim 4, wherein the conductor aluminum plate (51) comprises a transverse conductor aluminum plate and a longitudinal conductor aluminum plate which are integrally connected; the transverse conductor aluminum plate comprises a first aluminum plate, a second aluminum plate and a third aluminum plate which are respectively arranged corresponding to the high-voltage binding post (311), the medium-voltage binding post (312) and the low-voltage binding post (313); the longitudinal conductor aluminum plate is connected to one end of the first aluminum plate, one end of the second aluminum plate and one end of the third aluminum plate; one end of the longitudinal conductor aluminum plate penetrates through the wiring board (3) to be grounded; the terminal (31) is connected to the one end of connecting conductor (52), the one end that connecting conductor (52) kept away from terminal (31) is close to corresponding horizontal conductor aluminum plate and through screw in bolt (53) and the horizontal conductor aluminum plate electric connection that corresponds.

6. A wiring device for main transformer test according to claim 4, wherein said grounding device (5) further comprises an insulating protective cover (54) mounted on the wiring board (3), said conductor aluminum plate (51) is mounted in the insulating protective cover (54), the head of said bolt (53) extends out of the insulating protective cover (54); one end of the connecting conductor (52) far away from the conductor aluminum plate (51) extends out of the insulating protective cover (54) to be connected with the binding post (31).

7. A wiring connection for main transformer test according to claim 5 or 6 characterized in that the head of the bolt (53) is provided with an insulating sleeve.

8. A wiring device for a main transformer detection test according to any one of claims 1-3, 5 and 6, characterized in that when the box door (2) is closed, a sealing ring is arranged at the contact position of the box body (1) and the box door (2).