CN219392127U - Junction structure for temperature rise test of contact cabinet - Google Patents

Abstract

The utility model discloses a wiring structure for a contact cabinet temperature rise test, which is characterized in that a temperature rise test cable is led in from a contact side, a special test contact row and a short circuit row are not required to be manufactured, buses are saved, complicated installation and disassembly processes of the test contact row and the short circuit row are avoided, the workload is small, a large amount of manpower is saved, test matching devices are reduced, the related loss is reduced, most of time and cost are saved, the universality is strong, the wiring structure is suitable for various complex working conditions such as the contact cabinets with the same or different cabinet depths, the positions of the contact branch buses are different, the contact side test row and the short circuit row cannot be universal, and the like, and the requirements of rated current 3150-4000A contact cabinet temperature rise test are met; the bus conversion head is easy to recognize, the conversion head is prevented from being damaged through silver plating operation, the conductivity can be enhanced, the service cycle is long, and the replacement times are reduced.

Description

Junction structure for temperature rise test of contact cabinet

Technical Field

The utility model belongs to the technical field of high-voltage electrical equipment, and relates to a wiring structure for a temperature rise test of a contact cabinet.

Background

The high-voltage switch cabinet needs to be subjected to a long-time temperature rise test, namely, rated three-phase current or 1.1 times of rated three-phase current is applied to the high-voltage switch cabinet until the internal temperature of the high-voltage switch cabinet reaches a stable state. The test is an important test item for manufacturing quality inspection of the high-voltage switch cabinet, and can be used for checking the heating performance of the high-voltage switch cabinet during operation. Therefore, in the power industry, temperature rise is an important factor for measuring whether a switching product can stably run for a long time under rated current operation.

Along with the reinforcement of the strength and the structure of the switch cabinet with the armoured structure, the heat dissipation environment in the switch cabinet is poorer and worse. In actual operation of the switch cabinet, safety faults caused by local severe overheating phenomenon are numerous. The heating problem is not well solved, and the insulation parts in the switch cabinet can be aged in advance, so that faults such as main insulation breakdown, insulation damage, equipment damage, line power failure and the like occur.

In order to ensure the safe operation of the switch equipment, particularly high-capacity important switch equipment such as a wire inlet cabinet, a sectional cabinet and an isolation cabinet, the switch equipment needs to be subjected to temperature rise test spot check. The temperature rise of the switch cabinet can be checked and touched by a powerful switch cabinet manufacturer in a factory test. The most commonly used temperature rise test method at present is a short-circuit method, and the principle of the method is that a test cable with a temperature rise device is used, rated current of a circuit breaker which is 1.1 times is loaded on the switch device to be tested from A, B and C main bus sides of a test cabinet, A, B and C three-phase branch buses are short-circuited at a main loop outgoing side or a connecting side, meanwhile, temperature sensors are pre-buried at important parts such as a conductive loop and a shell of the switch cabinet, the temperature rise of each part of the switch cabinet is transmitted to the temperature rise device through the temperature sensors, and the temperature rise value of each sampling part is displayed on a screen or a computer screen of the temperature rise device.

In the temperature rise test of a sectional and isolation cabinet, a test cable is connected from the position of a main bus of a bus room by a specially manufactured test main bus, and a three-phase connection row is short-circuited at the bottom of the cable room. However, the bus bars of the cable chambers of the connecting cabinets are generally arranged in a delta shape, and each cabinet can be short-circuited with A, B and C three phases only by manufacturing 3 or 9 bus bars; and the difference of the positions of the contact branch rows of different cabinet depths is large, or even if the positions of the contact branch buses of the contact cabinets with the same cabinet depths are different due to the difference of the shapes of the core-penetrating type mutual inductors of the sectional cabinets, the contact branch rows and the short circuit rows cannot be used at all, and a plurality of test rows and short circuit rows need to be manufactured, so that a large amount of waste of the bus rows is caused.

Disclosure of Invention

In order to solve the problems, the utility model provides a temperature rise test wiring structure of a high-capacity contact cabinet, which is universal for contact cabinets of contact branch rows with different cabinet depths, different core penetrating transformer shapes and contact branch buses at different positions, can save bus bars, and has wide market application prospect.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

a wiring structure for a temperature rise test of a contact cabinet comprises a core-penetrating current transformer, a horizontal contact row, a bus adapter, a vertical contact down-lead row, a contact box branch row and a three-phase short circuit row;

the contact cabinet comprises a cabinet body, wherein a bus chamber is arranged above the rear side of the interior of the cabinet body, a cable chamber is arranged below the rear side of the interior of the cabinet body, and A, B and C three-phase contact box branch rows and three-phase short circuit rows are arranged in the bus chamber;

three identical core-penetrating current transformers are sleeved on the side wall of the cable chamber;

the contact box comprises three upper contact boxes and three lower contact boxes, the upper contact boxes are positioned in the bus chamber, the lower contact boxes are positioned in the cable chamber, the upper contact boxes are connected with the three-phase contact box branch rows in a one-to-one correspondence manner, and the lower contact boxes are connected with the vertical contact down-lead rows in a one-to-one correspondence manner;

the upper contact boxes are connected to a three-phase short circuit row through corresponding contact box branch rows respectively, the contact box branch rows are arranged in the vertical direction, and the three-phase short circuit rows are arranged in the horizontal direction and are positioned above the upper contact boxes;

the horizontal connecting row is sleeved in the core-penetrating current transformer, and one end of the horizontal connecting row outside the cable chamber is connected with the bus adapter in a fastening way; one end of the horizontal connection row in the cable room is connected with the vertical connection down-lead row, the vertical connection down-lead row is connected with the lower contact box, and the vertical connection down-lead row is positioned in the cable room.

Preferably, the contact box branch is of a three-layer branch composite structure.

Preferably, the contact box branch rows are three, namely an A-phase contact box branch row, a B-phase contact box branch row and a C-phase contact box branch row, and the A-phase contact box branch row, the B-phase contact box branch row and the C-phase contact box branch row have the same structure.

Preferably, the core-penetrating current transformers are respectively sleeved on the horizontal contact rows of the corresponding phases, three core-penetrating current transformers are respectively an A-phase core-penetrating current transformer, a B-phase core-penetrating current transformer and a C-phase core-penetrating current transformer, the A-phase core-penetrating current transformers are located above the B-phase core-penetrating current transformers, and the B-phase core-penetrating current transformers and the C-phase core-penetrating current transformers are located on the same horizontal position.

Preferably, the three through-core current transformers are respectively used as bus bushings of A, B and C three-phase horizontal interconnecting rows.

Preferably, the horizontal connection rows are respectively arranged in the core penetrating type current transformers of the corresponding phases, and three horizontal connection rows are respectively an A-phase horizontal connection row, a B-phase horizontal connection row and a C-phase horizontal connection row.

Preferably, one end of the phase A horizontal connection row, the phase B horizontal connection row and the phase C horizontal connection row in the cabinet is fixedly connected with the corresponding phase in-cabinet insulator or the sensor of the connection cabinet.

Preferably, the vertical contact down-link rows are respectively connected to the horizontal contact rows of the corresponding phases, and three vertical contact down-link rows are respectively an A-phase vertical contact down-link row, a B-phase vertical contact down-link row and a C-phase vertical contact down-link row.

Preferably, the bus adapter is connected with the horizontal contact row of the corresponding phase respectively, three bus adapters are arranged, the bus adapters are divided into an A-phase bus adapter, a B-phase bus adapter and a C-phase bus adapter, the A-phase bus adapter, the B-phase bus adapter and the C-phase bus adapter are identical in structure, and the bus adapters can be connected with a tested cable in a lap joint mode.

Preferably, the bus bar adapter is silver-plated.

Compared with the prior art, the utility model has the beneficial effects that:

the contact cabinet comprises a cabinet body, wherein a bus chamber is arranged above the rear side of the interior of the cabinet body, a cable chamber is arranged below the rear side of the interior of the cabinet body, and A, B and C three-phase contact box branch rows and three-phase short circuit rows are arranged in the bus chamber; three identical core-penetrating current transformers are sleeved on the side wall of the cable chamber; the horizontal connection row is sleeved in the core-penetrating current transformer, one end of the horizontal connection row in the cabinet body is connected with the vertical connection down-leading row, one end of the horizontal connection row outside the cabinet body is connected with the bus adapter in a fastening mode, and the bus adapter can be connected with a tested cable in a lap joint mode; the contact box comprises three upper contact boxes and three lower contact boxes, the upper contact boxes are positioned in the bus bar chamber, and the lower contact boxes are positioned in the cable chamber; each upper contact box is connected with a contact box branch row, one ends of the rectangles of the three contact box branch rows are all connected to a three-phase short circuit row, the contact box branch rows are arranged in the vertical direction, and the three-phase short circuit rows are arranged in the horizontal direction and are positioned above the upper contact boxes; different from the conventional contact cabinets of leading in test current from the bus-bar chamber and shorting in the cable chamber, the contact cabinet leads in test current from the cable chamber through the horizontal contact row, and the contact cabinet is short-circuited in the bus-bar chamber through the contact box row and the three-phase short-circuit row, so that temperature rise test is carried out, and the contact cabinet is universal for contact branch rows with different cabinet depths, different core-penetrating mutual inductor shapes and contact branch buses with different positions, and busbar is saved.

Furthermore, the contact box support row is of a three-layer support row composite structure, and enough current-carrying capacity is ensured to meet the temperature rise test requirement of the rated current 3150-4000A contact cabinet in the use process.

Furthermore, the bus conversion head is easy to identify, the conversion head is prevented from being damaged through silver plating operation, meanwhile, the conductivity can be enhanced, the service cycle is long, and the replacement times are reduced.

Drawings

FIG. 1 is a shorting diagram of a wiring structure for a tie cabinet temperature rise test of the present disclosure;

FIG. 2 is a side view of a wiring structure for a temperature rise test of a tie cabinet in accordance with the present disclosure;

FIG. 3 is a schematic view of a bus bar adapter of a wiring structure for a temperature rise test of a tie cabinet according to the present disclosure;

FIG. 4 is a side view of a contact box row of a wiring structure for a temperature rise test of a tie cabinet in accordance with the present utility model;

FIG. 5 is a front view of a contact box row of a wiring structure for a temperature rise test of a tie cabinet in accordance with the present utility model;

FIG. 6 is a schematic diagram of a three-phase shorting bar of a wiring structure for a tie cabinet temperature rise test of the present disclosure;

FIG. 7 is a schematic diagram of a pad of a wiring structure for a temperature rise test of a tie cabinet in accordance with the present utility model;

FIG. 8 is a shorting graph of a conventional tie cabinet temperature rise test;

fig. 9 is a shorted side view of a conventional tie cabinet temperature rise test.

1, a core penetrating type current transformer; 2. a horizontal tie bar; 201. phase A horizontal connection row; 202. phase B horizontal connection rows; 203. a phase C horizontal connection row; 3. a bus adapter; 301. phase A bus adapter; 302. phase B bus adapter; 303. c phase bus adapter; 4.a tested cable; 401. phase a test cable; 402. phase B test cable; 403. phase C test cable; 5. a vertical tie down row; 501. the phase A is vertically connected with the lower row; 502. the phase B is vertically connected with the lower row; 503. the phase C is vertically connected with the lower row; 6. a contact box; 601. an upper contact box; 602. a lower contact box; 7. a contact box branch; 701. a phase A contact box branch; 702. a phase B contact box branch; 703. c phase contact box branch rows; 8. three-phase short circuit rows; 9. a phase A test main bus; 10. b phase test main bus; 11. c phase test main bus; 12. the phase A is short-circuited to connect the row; 13. the phase B is connected with the connecting row in a short way; 14. and C phase short circuit connection rows.

Detailed Description

Reference will now be made in detail to the present embodiments of the present utility model, examples of which are illustrated in the accompanying drawings, wherein the accompanying drawings are used to supplement the description of the text portions with the purpose of enabling a person to intuitively and visually understand each technical feature and overall technical scheme of the present utility model, but are not to be construed as limiting the scope of the present utility model.

In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

The utility model will now be described in further detail with reference to specific examples, which are intended to illustrate, but not to limit, the utility model.

The utility model provides a wiring structure for a temperature rise test of a contact cabinet, referring to fig. 1-9, which comprises a core penetrating type flow transformer 1, a horizontal contact row 2, a bus adapter 3, a vertical contact down-conducting row 5, a contact box 6, a contact box support row 7 and a three-phase short circuit row 8;

the contact cabinet comprises a cabinet body, wherein a bus chamber is arranged above the rear side of the interior of the cabinet body, a cable chamber is arranged below the rear side of the interior of the cabinet body, and A, B, a C three-phase contact box branch row 7 and a three-phase short circuit row 8 are arranged in the bus chamber;

three identical core-penetrating current transformers 1 are sleeved on the side wall of the cable chamber;

the contact box 6 comprises three upper contact boxes 601 and three lower contact boxes 602, wherein the upper contact boxes 601 are positioned in a bus bar chamber, and the lower contact boxes 602 are positioned in a cable chamber; the upper contact boxes 601 are connected with the three-phase contact box branch rows 7 in a one-to-one correspondence manner, and the lower contact boxes 602 are connected with the vertical contact down-lead rows 5 in a one-to-one correspondence manner;

the upper contact boxes 601 are respectively connected to a three-phase short circuit row 8 through corresponding contact box branch rows 7. The contact box branch rows 7 are arranged along the vertical direction, and the three-phase short circuit rows 8 are arranged along the horizontal direction and are positioned above the upper contact box 601;

the horizontal connecting row 2 is sleeved in the core-penetrating current transformer 1, and one end of the horizontal connecting row 2 outside the cable chamber is bolted with the bus adapter 3; the horizontal tie bar 2 is connected at one end in the cable compartment with a vertical tie down bar 5, the vertical tie down bar 5 being connected with a lower contact box 602, the vertical tie down bar 5 being located in the cable compartment.

In a conventional cable room wiring structure, a tested cable 4 is used for leading test current into a bus room by using a specially manufactured A-phase test main bus 9, B-phase test main bus 10 and C-phase test main bus 11, and three-phase buses are short-circuited in the cable room, the A-phase test main bus 9, the B-phase test main bus 10 and the C-phase test main bus 11 are required to be connected through branch lines respectively, the number of required buses is large and excessively redundant, and the A-phase short-circuit connection line 12, the B-phase short-circuit connection line 13 and the C-phase short-circuit connection line 14 required by the three-phase buses in the short-circuit of the cable room are more complicated in connection, the A-phase short-circuit connection line 12 and the C-phase short-circuit connection line 14 are required to be lapped on the B-phase short-circuit connection line 13, and a-phase short-circuit connection line 12, the B-phase short-circuit connection line 13 and the C-phase short-circuit connection line 14 are required to consume a large amount of buses, and the universality is poor.

Therefore, compared with the wiring structure of the conventional cable room short circuit, the horizontal connection row 2 used in the scheme is the horizontal connection row 2 of the sectional and isolation cabinet in the actual engineering contract, only the bus adapter 3 and the contact box branch row 7 are actually manufactured, the current is introduced from the cable room through the horizontal connection row 2 by using a general structure, and the test current sequentially flows through the vertical connection down-connection row 5, the contact box branch row 7 of the circuit breaker reaching the bus room and the three-phase short circuit row 8 from bottom to top. The three-phase branch bus short circuit is conducted in the bus room through the contact box branch row 7 and the three-phase short circuit row 8, applicability is enhanced, the bus adapter 3 and the contact box branch row 7 can be used in various working conditions of a sectional cabinet, an isolation cabinet, left connection and right connection, are irrelevant to whether the switch cabinet is deep, the appearance of a transformer and the phase inversion of the switch cabinet, are applicable to rated current 3150-4000A connection cabinet temperature rise test requirements, are few in test row and strong in universality, save buses, and are flexible and labor-saving in test row installation. The complex installation and disassembly processes of the test connection row and the short circuit row are avoided, the related loss is reduced, the workload is small, and most of time and cost are saved.

In the embodiment of the present utility model, referring to fig. 4 and 5, the contact box branch 7 is a three-layer branch composite structure, which conducts the circuit and saves time and labor in installation. Two of the contact box branch rows 7 are arranged on the rated current 3150A connecting cabinet, three of the contact box branch rows 7 are arranged on the rated current 4000A connecting cabinet, and enough current carrying capacity is guaranteed, so that various adaptation schemes are provided according to different working conditions, waste of resources is reduced, and cost is reduced.

In a specific embodiment of the utility model, referring to fig. 4, 5 and 6, three contact box branches 7 are provided, namely an a-phase contact box branch 701, a B-phase contact box branch 702 and a C-phase contact box branch 703, and the a-phase contact box branch 701, the B-phase contact box branch 702 and the C-phase contact box branch 703 have the same structure. The arc heads of the A-phase contact box branch 701, the B-phase contact box branch 702 and the C-phase contact box branch 703 are respectively connected with the upper contact box 601, the rectangular tail parts are connected to the same three-phase short circuit row 8, the three-phase short circuit row 8 is a common short circuit row of a 1000mm wide overhead incoming line cabinet, test buses are saved, the installation workload of the temperature rise test buses is reduced, the structure is simple, the cost is saved, and the requirements of actual production are met.

In the embodiment of the present utility model, referring to fig. 1, three through-core current transformers 1 are used as bus bar bushings of A, B and C three-phase horizontal interconnection rows 2, respectively.

In a specific embodiment of the present utility model, referring to fig. 1, the core-penetrating current transformers 1 are respectively sleeved on the three-phase horizontal connection rows 2 of the corresponding phases, and are respectively an a-phase core-penetrating current transformer, a B-phase core-penetrating current transformer and a C-phase core-penetrating current transformer, wherein the a-phase core-penetrating current transformer is located above the B-phase core-penetrating current transformer, and the B-phase core-penetrating current transformer and the C-phase core-penetrating current transformer are located on the same horizontal position, so as to provide current measurement and protection signals for the protection device, and belong to a high-voltage primary element configured in engineering projects.

The A-phase core-through current transformer is sleeved with an A-phase horizontal connection row 201, one end of the A-phase horizontal connection row 201 in the cabinet body is connected with an A-phase vertical connection lower row 501, one end of the A-phase horizontal connection row 201 outside the cabinet body is bolted with an A-phase bus adapter 301, and the A-phase bus adapter 301 can be in lap joint with an A-phase tested cable 401;

the B-phase core-through current transformer is sleeved with a B-phase horizontal connection row 202, one end of the B-phase horizontal connection row 202 in the cabinet body is connected with a B-phase vertical connection lower row 502, one end of the B-phase horizontal connection row 202 outside the cabinet body is bolted with a B-phase bus adapter 302, and the B-phase bus adapter 302 can be in lap joint with a B-phase tested cable 402;

the C-phase through core type current transformer is sleeved with a C-phase horizontal connection row 203, one end of the C-phase horizontal connection row 203 in the cabinet body is connected with a C-phase vertical connection down-lead row 503, one end of the C-phase horizontal connection row 203 outside the cabinet body is bolted with a C-phase bus adapter 303, and the C-phase bus adapter 303 can be connected with a C-phase tested cable 403 in a lap joint mode.

In a specific embodiment of the utility model, referring to fig. 1, the horizontal connecting rows 2 are respectively disposed in the core-penetrating current transformers 1 of the corresponding phases, the a-phase horizontal connecting row 201 is disposed in the a-phase core-penetrating current transformer, the B-phase horizontal connecting row 202 is disposed in the B-phase core-penetrating current transformer, and the C-phase horizontal connecting row 203 is disposed in the C-phase core-penetrating current transformer.

In the embodiment of the present utility model, referring to fig. 1, one end of the horizontal connection bar 2 in the cabinet is fixedly connected with an insulator or a sensor in the connection cabinet, and the high-capacity temperature rise test horizontal connection bar 2 has a larger dead weight, so that one side in the horizontal connection bar cabinet needs to be fixed on the insulator or the high-voltage sensor of the switch cabinet, so that the lower contact box 6 and the core penetrating transformer 1 are not pressed due to dead weight sagging after the cable is spliced.

In an embodiment of the utility model, referring to fig. 4 and 5, the vertical contact down-link 5 is connected to the horizontal contact row 2 of the corresponding phase, the vertical contact down-link 501 of the a-phase is connected to the horizontal contact row 201 of the a-phase, the vertical contact down-link 502 of the B-phase is connected to the horizontal contact row 202 of the B-phase, and the vertical contact down-link 503 of the C-phase is connected to the horizontal contact row 203 of the C-phase.

In the embodiment of the present utility model, referring to fig. 1 and 3, the bus adapter 3 is respectively connected to the horizontal connection row 2 of the corresponding phase, three bus adapters are provided, and each bus adapter is divided into an a-phase bus adapter 301, a B-phase bus adapter 302 and a C-phase bus adapter 303, the a-phase bus adapter 301, the B-phase bus adapter 302 and the C-phase bus adapter 303 have the same structure, the a-phase bus adapter 301, the B-phase bus adapter 302 and the C-phase bus adapter 303 are respectively connected to the horizontal connection row 2 of the corresponding phase, and the bus adapter 3 can overlap the tested cable 4. Phase A bus adapter 301 is connected to phase A horizontal tie bar 201, phase B bus adapter 302 is connected to phase B horizontal tie bar 202, and phase C bus adapter 303 is connected to phase C horizontal tie bar 203. The adapter is universal for left connection and right connection cable lap joint, and is simple and convenient.

In the embodiment of the present utility model, referring to fig. 1 and 3, the bus adapter 3 is silvered, so that the bus adapter is easy to identify, and the operation of silvering can prevent the adapter from being damaged, and at the same time, the electrical conductivity can be enhanced, the service cycle is long, and the replacement times are reduced.

While the utility model has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the utility model is not limited to the disclosed embodiment, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims (10)

1. The wiring structure for the temperature rise test of the contact cabinet is characterized by comprising a core penetrating type current transformer (1), a horizontal contact row (2), a bus adapter (3), a vertical contact down-lead row (5), a contact box (6), a contact box branch row (7) and a three-phase short circuit row (8);

the contact cabinet comprises a cabinet body, wherein a bus chamber is arranged above the rear side of the interior of the cabinet body, a cable chamber is arranged below the rear side of the interior of the cabinet body, and A, B, a C three-phase contact box branch row (7) and a three-phase short circuit row (8) are arranged in the bus chamber;

three identical core-penetrating current transformers (1) are sleeved on the side wall of the cable chamber;

the contact box (6) comprises three upper contact boxes (601) and three lower contact boxes (602), wherein the upper contact boxes (601) are positioned in a bus chamber, the lower contact boxes (602) are positioned in a cable chamber, the upper contact boxes (601) are connected with three-phase contact box branch rows (7) in a one-to-one correspondence manner, and the lower contact boxes (602) are connected with vertical contact down-lead rows (5) in a one-to-one correspondence manner;

the upper contact box (601) is connected to a three-phase short circuit row (8) through corresponding contact box branch rows (7), the contact box branch rows (7) are arranged in the vertical direction, and the three-phase short circuit rows (8) are arranged in the horizontal direction and are positioned above the upper contact box (601);

a horizontal connecting row (2) is sleeved in the core-penetrating current transformer (1), and one end of the horizontal connecting row (2) outside the cable chamber is bolted with a bus adapter (3); the horizontal connection row (2) is connected with the vertical connection down-link row (5) at one end in the cable room, the vertical connection down-link row (5) is connected with the lower contact box (602), and the vertical connection down-link row (5) is positioned in the cable room.

2. The wiring structure for the temperature rise test of the contact cabinet according to claim 1, wherein the contact box support row (7) is of a three-layer support row composite structure.

3. The connection structure for the temperature rise test of the contact cabinet according to claim 1, wherein three contact box branch rows (7) are respectively an A-phase contact box branch row (701), a B-phase contact box branch row (702) and a C-phase contact box branch row (703), and the A-phase contact box branch row (701), the B-phase contact box branch row (702) and the C-phase contact box branch row (703) have the same structure.

4. The connection structure for the temperature rise test of the connection cabinet according to claim 1, wherein the core-penetrating current transformers (1) are respectively sleeved on the horizontal connection rows (2) of the corresponding phases, three core-penetrating current transformers are respectively an A-phase core-penetrating current transformer, a B-phase core-penetrating current transformer and a C-phase core-penetrating current transformer, the A-phase core-penetrating current transformers are located above the B-phase core-penetrating current transformers, and the B-phase core-penetrating current transformers and the C-phase core-penetrating current transformers are located on the same horizontal position.

5. The connection structure for the temperature rise test of the connecting cabinet according to claim 4, wherein three through-core type current transformers (1) are respectively used as bus bar bushings of a A, B and C three-phase horizontal connecting row (2).

6. The connection structure for the temperature rise test of the connection cabinet according to claim 4, wherein the horizontal connection rows (2) are respectively arranged in the core penetrating type current transformers (1) of the corresponding phases, and three connection rows are respectively an A-phase horizontal connection row (201), a B-phase horizontal connection row (202) and a C-phase horizontal connection row (203).

7. The connection structure for the temperature rise test of the connection cabinet according to claim 6, wherein one end of the A-phase horizontal connection row (201), the B-phase horizontal connection row (202) and the C-phase horizontal connection row (203) in the cabinet is fixedly connected with insulators or sensors of corresponding phases in the connection cabinet.

8. The connection structure for the temperature rise test of the contact cabinet according to claim 6, wherein the vertical contact down-lead rows (5) are respectively connected to the horizontal contact rows (2) of the corresponding phase, and three vertical contact down-lead rows (501) of the phase A, the vertical contact down-lead rows (502) of the phase B and the vertical contact down-lead rows (503) of the phase C are respectively arranged.

9. The connection structure for the temperature rise test of the contact cabinet according to claim 6, wherein the bus adapter (3) is respectively connected with the horizontal contact row (2) of the corresponding phase, three bus adapters are respectively arranged and are divided into an A-phase bus adapter (301), a B-phase bus adapter (302) and a C-phase bus adapter (303), the A-phase bus adapter (301), the B-phase bus adapter (302) and the C-phase bus adapter (303) are identical in structure, and the bus adapter (3) can be connected with a tested cable (4) in a lap joint mode.

10. The connection structure for a contact cabinet temperature rise test according to claim 1, wherein the busbar adapter (3) is silver plated.