Large-current KYN wire inlet cabinet

Abstract

The utility model relates to a large-current KYN incoming cabinet, which comprises a shell, a cabinet body, a cabinet top small bus, a circuit breaker, a contact box, a circuit breaker upper connecting piece, a circuit breaker lower connecting piece, a bus chamber baffle plate, a supporting beam, a current transformer bracket, an insulating supporting column, a top axial flow fan, a bottom cross flow fan, an overvoltage protector, a grounding switch, a current transformer and a wall bushing. Wherein the shell is formed by bending, locking, splicing and assembling a metal plate, and a circuit breaker and a circuit breaker upper connecting piece and a circuit breaker lower connecting piece are in butt joint in the cabinet body to form a complete incoming line loop so as to provide an incoming line control switch for the whole power distribution section; according to the utility model, through reasonable arrangement, the utilization rate of the internal space of the cabinet body is realized as much as possible, and a set of high-current KYN wire inlet cabinet which is safe and reliable in structure and good in heat dissipation is provided.

Description

Technical Field

[0001] The utility model relates to the technical field of large-current incoming line cabinets, and in particular to an internal layout and heat dissipation structure of a large-current KYN incoming line cabinet. Background Art

[0002] KYN refers to indoor AC metal-clad removable switchgear. With the development of the global economy, the application areas of KYN cabinets have also changed. The original application of KYN cabinets in the power transmission of small generators, power reception and transmission in power system secondary substations, power distribution in industrial and mining enterprises and institutions, and other small and medium current ranges have gradually changed to the power transmission range of power stations and large generators. It can be seen that the demand for high-current KYN cabinets is increasing.

[0003] The incoming cabinets of high-current KYN cabinets require high heat dissipation due to the high current on the incoming side. If the ambient temperature is too high or air flow is poor, the large amount of heat generated within the cabinet cannot be quickly dissipated, causing equipment to trip due to overheating or even safety accidents. Existing high-current KYN cabinets have large enclosures, poor heat dissipation, and a lack of reliability and safety. Therefore, there is an urgent need for a high-current KYN incoming cabinet with a compact cabinet and excellent heat dissipation. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the utility model provides a large-current KYN incoming line cabinet. Through reasonable layout and ingenious design, it uses the smallest cabinet space as much as possible and optimizes material and space utilization to provide a design and production solution for a large-current KYN incoming line cabinet with safe and reliable structure, convenient processing, good heat dissipation and simple installation to solve the above problems.

[0005] The utility model provides the following technical solutions:

[0006] A high-current KYN incoming line cabinet comprises a shell and a cabinet body. The cabinet body is divided into a front portion and a rear portion. The front portion is a circuit breaker chamber, and the rear portion is a copper busbar chamber. The copper busbar chamber is divided into a cabinet top busbar chamber and a copper busbar incoming line chamber by a busbar chamber baffle. The busbar chamber baffle is composed of a first baffle and a second baffle. The cabinet top busbar chamber is located above and in front of the copper busbar chamber. A current transformer is further provided behind the first baffle of the busbar chamber baffle. The current transformer is located at the outlet end of the copper busbar incoming line chamber. The circuit breaker chamber is provided with a circuit breaker, which is connected to an upper connecting piece and a lower connecting piece of the circuit breaker through upper and lower contact boxes, respectively. The upper connecting piece of the circuit breaker is installed in the cabinet top busbar chamber, and the lower connecting piece of the circuit breaker is installed in the copper busbar incoming line chamber. It extends from the cabinet body from the upper rear portion to connect with the incoming line transformer, thereby forming a complete incoming line circuit. The portion extending from the cabinet body is fixed by a wall sleeve.

[0007] Furthermore, an axial flow fan is provided on the top of the circuit breaker chamber; an axial flow fan is provided on the top of the copper busbar chamber, and a cross flow fan is provided on the bottom. The second baffle of the busbar chamber baffle is provided with a 5*40 array ventilation hole, forming a complete heat dissipation duct for the copper busbar chamber at the rear of the entire cabinet.

[0008] Preferably, the shell of the incoming line cabinet is formed by bending and locking sheet metal and splicing and assembling; the shell material of the copper busbar chamber is stainless steel.

[0009] Furthermore, at the connection between the copper bars and the contact box, the copper bars at the front and rear are bent forward and backward respectively, and the copper bar in the middle remains stationary, creating gaps between the copper bars to facilitate heat dissipation.

[0010] Furthermore, a support beam, an insulating support and a current transformer bracket are provided in the copper busbar chamber; the insulating support and the current transformer bracket are both installed on the support beam, the insulating support is used to fix the upper connecting piece and the lower connecting piece of the circuit breaker, and the current transformer bracket is used to fix the current transformer.

[0011] Furthermore, two sets of current transformers are installed at the outlet end of the copper busbar inlet chamber, and the lower connecting piece of the circuit breaker passes through the current transformer. The dimensions of the current transformer are 420 mm in length, 340 mm in width, and 410 mm in height; the phase spacing of the circuit breaker is set to 275 mm, and the phase spacing of the current transformer is 375 mm. A 10*200 copper busbar is used as a jumper for in-phase spacing expansion.

[0012] Furthermore, an overvoltage protector and a grounding knife are provided in the cabinet. The voltage protector and the grounding knife are both installed in the lower part of the copper busbar incoming line chamber and connected to the lower connecting piece of the circuit breaker; a cabinet top busbar is also provided on the top of the circuit breaker chamber.

[0013] The present invention has the following beneficial technical effects: compared with conventional large-current central cabinets, the present invention reserves space for current transformers by arranging copper busbar overlaps, making the shell smaller, and providing copper busbar bends to facilitate copper busbar heat dissipation, as well as special heat dissipation channels, so that the heat dissipation in the cabinet space is better; the overall structure is more convenient to install, has higher strength and better performance, and while meeting various safety electricity requirements, it saves shell space, reduces procurement and production costs, and can stably, safely and reliably operate the equipment; the present invention has a novel and simple structure, is easy to process, has complete functions, is low in cost and is easy to install. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the arrangement of components in the large current KYN incoming line cabinet of the utility model;

[0015] Figure 2This is a schematic diagram of the connection between the copper busbar and the contact box of the circuit breaker of the utility model;

[0016] Figure 3 This is a schematic diagram of the in-phase expansion of the copper busbar of the utility model.

[0017] The reference numerals in the figures are:

[0018] 1 Circuit breaker, 2 Axial fan, 3 Cabinet top small busbar room, 4 Cross flow fan, 5 Overvoltage protector, 6 Grounding switch, 7 Insulation support, 8 Busbar room baffle, 8-1 First baffle, 8-2 Second baffle, 9 Current transformer, 10 Circuit breaker upper connecting piece, 11 Circuit breaker lower connecting piece, 11-1 In-phase expansion joint, 11-2 Incoming line lower connecting piece, 12 Support beam, 13 Contact box, 14 Current transformer bracket, 15 Wall sleeve, 16 Ventilation hole. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] Example

[0021] The utility model provides a cabinet component arrangement and a cabinet copper busbar direction structure of a 5000A high-current center cabinet incoming line cabinet.

[0022] In this embodiment, if Figure 1 As shown, a 5000A high-current KYN incoming line cabinet includes a shell and a cabinet body. The shell of the incoming line cabinet is formed by bending and locking sheet metal and splicing. The shell specifications are 2320mm high, 1200mm wide, and 2300mm deep.

[0023] The cabinet body is divided into a front part and a rear part. The front part is a circuit breaker chamber and the rear part is a copper bar chamber. The shell material of the copper bar chamber is made of stainless steel. The copper bar chamber is divided into a cabinet top busbar chamber and a copper bar incoming line chamber by a busbar chamber baffle 8. The busbar chamber baffle is composed of a first baffle 8-1 and a second baffle 8-2. The cabinet top busbar chamber is located in the front and upper part of the copper bar chamber. A current transformer 9 is also provided behind the first baffle 8-1 of the busbar chamber baffle. The current transformer The device 9 is at the outlet end of the copper busbar incoming line chamber; the circuit breaker chamber is provided with a circuit breaker 1, and the circuit breaker 1 is connected to the upper connecting piece 10 and the lower connecting piece 11 of the circuit breaker through the upper and lower contact boxes 13 respectively; the upper connecting piece 10 of the circuit breaker is installed in the busbar chamber on the top of the cabinet, and the lower connecting piece 11 of the circuit breaker is installed in the copper busbar incoming line chamber, and extends from the upper rear of the cabinet to connect with the incoming line transformer, thereby forming a complete incoming line circuit, and the part extending from the cabinet is fixed by the wall sleeve 15.

[0024] As shown in the above arrangement, the circuit breaker 1 is placed at the front of the cabinet to facilitate its removal. The main difference from the docking KYN cabinet is that its circuit breaker can be moved outside the cabinet, making maintenance and replacement more convenient. An axial flow fan 2 is installed vertically above the circuit breaker to provide heat dissipation for the circuit breaker during operation, ensuring that the temperature at the front of the cabinet does not exceed the safe range when the equipment is running.

[0025] In this embodiment, in order to avoid the busbar room temperature being too high, Figure 1 An axial flow fan 2 is installed at the corresponding position on the top of the busbar chamber on the top of the cabinet shown, and a 5*40 array ventilation hole 16 is opened at the bottom of the second baffle 8-2 of the busbar chamber baffle 8. A cross flow fan 4 is installed at the lower part of the copper busbar chamber to blow the hot air from bottom to top through the ventilation array holes at the bottom of the busbar chamber baffle 8. The axial flow fan 2 at the top draws the hot air from the inside to the outside, forming a complete heat dissipation duct for the copper busbar chamber at the rear of the entire cabinet.

[0026] In this embodiment, if Figure 2 As shown, the upper connecting piece 10 of the circuit breaker is inserted into the contact box 13. Due to the large current, more copper bars need to be connected. When the power is on, the copper bars generate a lot of heat. To avoid a series of problems caused by the overheating of the copper bars, after the copper bars extend out of the contact box 13, the copper bars at the front and rear are bent forward and backward respectively, and the copper bar in the middle is left unchanged, creating gaps between the front, middle and rear bars to facilitate heat dissipation of the copper bars. Similar to the upper connecting piece 10 of the circuit breaker, the lower connecting piece 11 of the circuit breaker is inserted into the contact box 13, and at the exit of the contact box 13, the front and rear copper bars are bent forward and backward respectively, creating space gaps between the copper bars to facilitate heat dissipation.

[0027] In the busbar room on the top of the cabinet Figure 1 As shown in the appropriate position, fix the insulating support 7, and fix the insulating support 7 to the upper connecting piece 10 of the circuit breaker; at the rear of the cabinet, press the support beam 12 as shown in the figure. Figure 1 As shown in the figure, fix it on the cabinet housing, fix the insulating support 7 on the support beam 12, lock the lower connecting piece 11 of the circuit breaker with the insulating support 7; place the grounding knife 6 and the overvoltage protector 5 in the Figure 1 The lower rear part of the cabinet shown is connected to the lower connecting piece 11 of the circuit breaker and locked.

[0028] Fix the support beams 12 on the left and right sides of the copper busbar room at the rear of the cabinet, install the current transformer bracket 14 on the support beam 12, and the insulating support 7 is also installed on the support beam 12. Two groups of current transformers are installed at the outlet end of the copper busbar inlet room. The lower connecting piece of the circuit breaker passes through the current transformer. The current transformer has a size of 420mm in length, 340mm in width, and 410mm in height. Due to the large size of the current transformer 9, the phase spacing after the current transformer 9 is installed on the current transformer bracket 14 is 375mm, while the phase spacing of the circuit breaker 1 is 275mm. Therefore, it is necessary to perform a copper busbar in-phase expansion before the lower connecting piece 11 of the circuit breaker enters the current transformer 9, such as Figure 3 As shown, the circuit breaker lower connecting piece 11 is interrupted at the lower end of the current transformer and connected to the same-phase expansion strap 11-1. The same-phase expansion strap 11-1 widens the copper busbar phase spacing from 275mm to 375mm. The other end of the expansion strap is connected to the lower connecting piece 11-2 of the incoming line, thus completing the copper busbar expansion. The smaller phase spacing between the front copper buses reserves a certain amount of space for the large-sized current transformer at the rear, making the entire cabinet small in size and large in storage space. The use of copper busbar expansion also effectively solves the connection problem between the large-sized current transformer.

[0029] In this embodiment, the incoming line connecting piece 11-2 passes through two sets of current transformers 9, is fixed by insulating supports 7, extends out of the cabinet and connects to the incoming line transformer, and the part extending out of the cabinet is fixed by a wall sleeve 15, forming a complete and controllable incoming line loop.

[0030] The 5000A high-current KYN incoming line cabinet assembled according to the technical solution of this embodiment has a reasonable layout, a stable structure, and good heat dissipation, and can meet the expected requirements with the smallest space.

[0031] The above-described embodiments merely represent specific implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the scope of the present invention, all of which fall within the scope of protection of the present invention.

Claims

1. A high current KYN incoming line cabinet, comprising a shell and a cabinet body, characterized in that: The cabinet body is divided into a front part and a rear part, the front part is a circuit breaker chamber, and the rear part is a copper bar chamber. The copper bar chamber is divided into a cabinet top busbar chamber and a copper bar incoming line chamber by a busbar chamber baffle (8). The busbar chamber baffle is composed of a first baffle (8-1) and a second baffle (8-2). The cabinet top busbar chamber is located above and in front of the copper bar chamber. A current transformer (9) is further provided behind the first baffle (8-1) of the busbar chamber baffle. The current transformer (9) is located in the copper bar incoming line chamber. Outlet terminal; the circuit breaker chamber is provided with a circuit breaker (1), and the circuit breaker (1) is connected to the upper connecting piece (10) and the lower connecting piece (11) of the circuit breaker through the upper and lower contact boxes (13); the upper connecting piece (10) of the circuit breaker is installed in the busbar chamber on the top of the cabinet, and the lower connecting piece (11) of the circuit breaker is installed in the copper busbar incoming line chamber, and extends from the upper rear of the cabinet to connect with the incoming line transformer, thereby forming a complete incoming line circuit, and the part extending from the cabinet is fixed by a wall sleeve (15).

2. A high current KYN incoming line cabinet according to claim 1, characterized in that: An axial flow fan is provided on the top of the circuit breaker chamber.

3. A high current KYN incoming line cabinet according to claim 1, characterized in that: An axial flow fan is provided on the top of the copper bar chamber, and a cross flow fan is provided on the bottom. The second baffle (8-2) of the busbar chamber baffle is provided with a 5*40 array ventilation hole (16), forming a complete heat dissipation air duct for the copper bar chamber at the rear of the entire cabinet.

4. A high current KYN incoming line cabinet according to claim 1, characterized in that: The shell of the incoming line cabinet is formed by bending and locking sheet metal and splicing and assembling; the shell material of the copper busbar chamber is all stainless steel.

5. A high current KYN incoming line cabinet according to claim 1, characterized in that: At the connection between the copper bars and the contact box (13), the copper bars at the front and rear are bent forward and backward respectively, and the copper bar at the middle is kept stationary, so as to create gaps between the copper bars for heat dissipation.

6. A high current KYN incoming line cabinet according to claim 1, characterized in that: The copper busbar chamber is further provided with a support beam (12), an insulating support column (7) and a current transformer bracket (14); the insulating support column (7) and the current transformer bracket (14) are both mounted on the support beam (12); the insulating support column (7) is used to fix the upper connecting piece (10) and the lower connecting piece (11) of the circuit breaker; and the current transformer bracket (14) is used to fix the current transformer (9).

7. A high current KYN incoming line cabinet according to claim 6, characterized in that: Two groups of current transformers (9) are provided at the outlet end of the copper busbar inlet chamber, and the circuit breaker lower connecting piece (11) passes through the current transformers (9).

8. A high current KYN incoming line cabinet according to claim 7, characterized in that: The phase spacing of the current transformer (9) is greater than the phase spacing of the circuit breaker (1), and in-phase spacing expansion is performed using in-phase spacing expansion straps (11-1).

9. The high current KYN incoming line cabinet according to claim 1, characterized in that: An overvoltage protector (5) and a grounding knife (6) are also provided in the cabinet. The overvoltage protector (5) and the grounding knife (6) are both installed in the lower part of the copper busbar incoming line chamber and connected to the lower connecting piece (11) of the circuit breaker.

10. A high current KYN incoming line cabinet according to claim 1, characterized in that: A cabinet top small busbar (3) is also provided on the top of the circuit breaker chamber.

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