CN120674919A

CN120674919A - A full copper busbar circuit breaker cabinet

Info

Publication number: CN120674919A
Application number: CN202510688562.8A
Authority: CN
Inventors: 胡三红; 翁士友
Original assignee: Hangzhou Only Power Supply Equipment Co ltd
Current assignee: Hangzhou Only Power Supply Equipment Co ltd
Priority date: 2025-05-27
Filing date: 2025-05-27
Publication date: 2025-09-19

Abstract

The invention discloses a full-copper-bar circuit breaker group cabinet which comprises a cabinet body, wherein a screen top busbar with an alternating current incoming line penetrating through the screen top of the cabinet body is arranged above the cabinet body, a plurality of circuit breaker groups arranged in a row are arranged in the cabinet body and are connected through vertical copper bars, the screen top busbar is connected with the uppermost circuit breaker group in the cabinet body through switching copper bars, the circuit breaker groups comprise mounting plates transversely mounted in the cabinet body, a plurality of circuit breakers are arranged on the mounting plates, three-phase connection ports above the circuit breakers are connected together through bus copper bars, the bus copper bars of the uppermost circuit breaker group in the cabinet body are connected with the switching copper bars, and the bus copper bars of other circuit breaker groups are connected with the vertical copper bars.

Description

All-copper-bar circuit breaker cabinet

Technical Field

The invention belongs to the technical field of electrical equipment, and particularly relates to a full copper bar circuit breaker cabinet.

Background

The voltage breaker is an electric appliance which has the function of manual switch and can automatically perform voltage loss, undervoltage, overload and short-circuit protection. It can be used to distribute electric energy, not frequently start asynchronous motor, protect power supply circuit and motor, and can automatically cut off circuit when they have serious overload or short circuit and under-voltage faults, its function is equivalent to the combination of fuse switch and over-under-heating relay. The safe and stable operation of the feeder line of the transformer substation is an important guarantee for the normal operation of the power system, and the traditional breaker cabinet is usually connected with a short-circuit copper bar by a cable or is in a mode of independently lapping each phase by the copper bar.

Prior art publication No. CN221961413U discloses a generator outlet breaker cabinet in which a plurality of isolation plates are fixed in a cabinet housing to divide an inner space of the cabinet housing into a plurality of compartments. The compartment includes a primary component compartment including a breaker compartment for housing a breaker, wherein the breaker includes a breaker rated for current greater than or equal to 5000A. The damping of the vibration isolator is larger than the preset damping, and the amplification factor of the vibration isolator is smaller than or equal to 3.5 under the resonance frequency. Therefore, the accommodating volume of the breaker compartment can accommodate the breaker with rated current larger than or equal to 5000A, meanwhile, the damping of the vibration isolator is larger than the preset damping, and under the resonance frequency, the amplification factor of the vibration isolator is smaller than or equal to 3.5, so that the vibration isolation function of the cabinet body can be met, and the normal work of the breaker is ensured under the marine environment condition.

Disclosure of Invention

The safe and stable operation of the feeder line of the transformer substation is an important guarantee for the normal operation of the power system, and the traditional breaker cabinet is usually connected with a short-circuit copper bar by a cable or is lapped by each phase of copper bars, so that the problems of 1. More connection points exist, and the fault points and the maintenance difficulty are increased. 2. The unreasonable layout of copper bar leads to current distribution uneven, and the heat dispersion is poor, influences stability and the security of system. 3. The cabinet has complex structure, large consumption of cables or copper bars and inconvenient installation and maintenance.

In order to solve the problems, the technical scheme is that the full-copper-bar circuit breaker group cabinet comprises a cabinet body, a screen top busbar which is formed by penetrating an alternating current incoming line through the screen top of the cabinet body is arranged above the cabinet body, a plurality of circuit breaker groups which are arranged in a row are arranged in the cabinet body, different circuit breaker groups are connected through vertical copper bars, the screen top busbar is connected with the uppermost circuit breaker group in the cabinet body through switching copper bars, and the vertical copper bars are connected with the switching copper bars.

The circuit breaker group comprises a mounting plate transversely mounted in the cabinet body, a plurality of circuit breakers are arranged on the mounting plate, three-phase connectors above the circuit breakers are connected together through bus copper bars, each bus copper bar comprises an A-phase copper bar, a B-phase copper bar and a C-phase copper bar, the bus copper bar of the uppermost circuit breaker group in the cabinet body is connected with the switching copper bar, and the bus copper bars of other circuit breaker groups are connected with the vertical copper bars.

Specifically, the junction of busbar copper bar and switching copper bar or perpendicular copper bar is equipped with the fixed foot of area kink structure, and the fixed foot of A looks copper bar turns to the cabinet in, and the fixed foot of B looks copper bar does not turn, and the fixed foot of C looks copper bar turns to the cabinet outside, and the interval exceeds safe electric distance between the fixed foot of three-phase busbar copper bar. The tail part of each phase of the three-phase bus copper bar is also bent and turned, and is overlapped with the vertical copper bar in a layered staggered manner.

Specifically, insulators are arranged on the bus copper bars at intervals, so that the electric gaps among the three-phase bus copper bars are ensured, and the three-phase bus copper bars are simultaneously fixed. The insulator can prevent arc discharge risk, and heat dissipation requirements among copper bars can be guaranteed.

Specifically, each circuit breaker is equipped with an output copper bar or a conductive terminal as a load connection port, and the load connection port is arranged on the back of the cabinet body. Each circuit breaker can be matched with a connection scheme of an output copper bar or a conductive terminal according to the size of a field cable.

Specifically, the junction of perpendicular copper bar and switching copper bar is equipped with perpendicular busbar frame, and perpendicular busbar frame fixes the copper bar, guarantees the electric distance between the copper bar.

Specifically, the cabinet body both sides are equipped with the mount, and the circuit breaker group passes through the set screw on the mounting panel and is connected with the mount of the cabinet body.

Specifically, the circuit breaker group is assembled outside the cabinet body, is fixed through screws after being installed into the cabinet body, and then is connected with the vertical copper bar or the switching copper bar through the fixing feet of the three-phase bus copper bar. The circuit breaker group can be regarded as a module assembly to be assembled outside the cabinet in advance, and the installation structure is simple and convenient, and the maintenance and the replacement are convenient.

Specifically, cabinet body zero row and ground connection row are equipped with in cabinet body bottom, and cabinet body zero row is equipped with a plurality of holes that vary in size.

Specifically, the bus copper bar is connected with a three-phase connector above the circuit breaker through bolts. The copper bars are connected through bolts, the connection mode is reliable, the stable current transmission is ensured, and the stability and the reliability of the equipment under long-time operation are ensured.

The beneficial effects of the invention are as follows:

1. The full copper bar structure has excellent conductivity, can obviously reduce resistance loss in electrical connection and improve the efficiency of electrical equipment;

2. enhancing heat radiation performance, namely improving the heat radiation performance of the electrical equipment by optimizing heat radiation design, and ensuring the stability and reliability of the equipment under long-time operation;

3. The installation process is simplified, namely the upper opening copper bar of the modularized circuit breaker is assembled in advance, so that the installation process is simplified, and the installation cost and time are reduced;

4. The reliability and the safety of the integral structure are improved, and the reliability and the safety of the integral structure are improved and the risk of electric faults is reduced through reasonable layout and safety protection measures.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present invention.

Fig. 2 is a schematic structural diagram of the first circuit breaker group.

Fig. 3 is a top view of the first circuit breaker group.

Fig. 4 is a schematic structural diagram of the second circuit breaker set and the load connection port.

Fig. 5 is a back structure diagram of the full copper bar circuit breaker cabinet of the invention.

Fig. 6 is an enlarged view of a portion of the vertical copper bar overlap of fig. 5.

Fig. 7 is a schematic diagram of connection of copper bars.

In the figure, a cabinet body 1, a screen top busbar 2, a first breaker group 3, a second breaker group 4, a screen top switching copper bar 5, a vertical copper bar 6, a first mounting plate 7, a first breaker 8, a first insulator 9, a first A-phase copper bar 10, a first B-phase copper bar 11, a first C-phase copper bar 12, a second mounting plate 13, a large breaker 14, a small breaker 15, a second insulator 16, a second A-phase copper bar 17, a second B-phase copper bar 18, a second C-phase copper bar 19, an A-phase copper bar interface 20, a B-phase copper bar interface 21, a C-phase copper bar interface 22, an output copper bar 23, a conductive terminal 24, a cabinet body zero bar 25, a grounding bar 26 and a vertical bus frame 27.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and examples.

The first embodiment of the invention relates to a full copper bar circuit breaker group cabinet, which comprises a cabinet body, wherein a screen top busbar with an alternating current incoming line penetrating through the screen top of the cabinet body is arranged above the cabinet body, a plurality of circuit breaker groups arranged in a row are arranged in the cabinet body, different circuit breaker groups are connected through vertical copper bars, the screen top busbar is connected with the uppermost circuit breaker group in the cabinet body through a switching copper bar, and the vertical copper bar is connected with the switching copper bar.

The junction of the busbar copper bar and the switching copper bar or the vertical copper bar is provided with a fixed pin with a bending structure, the A-phase copper bar fixed pin is bent towards the inside of the cabinet, the B-phase copper bar fixed pin is not bent, the C-phase copper bar fixed pin is bent towards the outside of the cabinet, and the interval between the fixed pins of the three-phase busbar copper bar exceeds the safe electrical distance. The tail part of each phase of the three-phase bus copper bar is also bent and turned, and is overlapped with the vertical copper bar in a layered staggered manner.

And insulators are arranged on the bus copper bars at intervals, so that the electric gaps among the three-phase bus copper bars are ensured, and the three-phase bus copper bars are simultaneously fixed. The insulator can prevent arc discharge risk, and heat dissipation requirements among copper bars can be guaranteed.

Each circuit breaker is provided with an output copper bar or a conductive terminal as a load connection port, and the load connection port is arranged on the back of the cabinet body. Each circuit breaker can be matched with a connection scheme of an output copper bar or a conductive terminal according to the size of a field cable.

The vertical bus frame is arranged at the joint of the vertical copper bar and the switching copper bar, and the vertical bus frame fixes the copper bars, so that the electrical distance between the copper bars is ensured.

The cabinet body both sides are equipped with the mount, and the circuit breaker group passes through set screw on the mounting panel and is connected with the mount of the cabinet body. The circuit breaker group is assembled outside the cabinet body, is fixed through screws after being installed into the cabinet body, and then is connected with the vertical copper bar or the switching copper bar through the fixing feet of the three-phase bus copper bar. The circuit breaker group can be regarded as a module assembly to be assembled outside the cabinet in advance, and the installation structure is simple and convenient, and the maintenance and the replacement are convenient.

The bottom of the cabinet body is provided with a cabinet body zero row and a grounding row, and the cabinet body zero row is provided with a plurality of holes with different sizes.

The bus copper bar is connected with a three-phase connection port above the circuit breaker through bolts. The copper bars are connected through bolts, the connection mode is reliable, the stable current transmission is ensured, and the stability and the reliability of the equipment under long-time operation are ensured.

In the copper bar design of this embodiment, design a copper bar of specific specification, its cross-sectional shape, size and current-carrying capacity all calculate accurately according to electrical system's demand, the circuit breaker upper shed three-phase designs a turn busbar respectively, copper bar fixed foot staggers through bending turn layering, the busbar ensures that current distribution is even, reduce copper bar quantity, copper bar tail overlap joint perpendicular copper bar department staggers the layering through the mode of bending turn and is fixed in perpendicular copper bar, through screen top switching copper bar overlap joint to busbar.

According to the embodiment, on the layout planning of the whole cabinet body, the layout of the copper bars is reasonably planned according to the structure and the size of the electric cabinet, the distance between the copper bars is ensured to meet the electric safety requirement, insulating pieces are arranged between each two phases, the circuit breaker group can be regarded as a module assembly to be assembled outside the cabinet in advance, and then the whole cabinet is assembled, so that the installation and the maintenance are convenient. The connection between the copper bar and the upper opening of the circuit breaker adopts a reliable bolt connection mode, so that the firmness and stability of electrical connection are ensured.

In the heat dissipation design of this embodiment, the heat dissipation demand is fully considered in the design of copper bar, has increased the electric gap through the mode that the copper bar bent the turn, has improved heat dissipation area and optimized heat dissipation route, improves electrical equipment's heat dispersion, and the copper bar passes through bolted connection, and the connected mode is reliable, ensures that the current transmission is stable ensures stability and the reliability of equipment under long-time operation.

In the aspect of safety protection, proper insulation measures and grounding protection in the cabinet are arranged between the copper bars so as to prevent potential safety hazards such as electrical short circuit, arc discharge and the like.

The specific implementation is shown in the figure. In fig. 1, a cabinet body 1 is a standard cabinet body of a national network, a plurality of circuit breaker groups can be accommodated from top to bottom in the cabinet body, a screen top busbar 2 is a busbar penetrating through a screen top of an ac incoming line cabinet, a first circuit breaker group 3 is formed by installing a plurality of circuit breakers with the same shell, an installing plate and a bus copper bar in the cabinet body 1, and an upper opening of each circuit breaker is connected with the copper bar through bolts to form a circuit breaker group. The second breaker group 4 is formed by installing a plurality of shell breakers with different sizes, a mounting plate and a bus copper bar in the cabinet body 1, and the upper opening of each breaker is connected with the copper bar through bolts to form a breaker group. The switching copper bar 5 on the screen top is a copper bar which is overlapped and converted from the busbar. The vertical copper bar 6 is a vertically lapped copper bar from top to bottom, and the vertical copper bar 6 connects the screen top switching copper bar 5 with the breaker groups 3 and 4 of each section.

As shown in fig. 2, the detailed copper bar assembling structure of the first circuit breaker group 3 can be regarded as that a module assembly is assembled outside the cabinet in advance, then the whole circuit breaker group 3 is assembled into a cabinet, the installation structure of the circuit breaker group 3 is simple and convenient, the circuit breaker group 3 is assembled by a mounting plate 7, a circuit breaker 8, an insulator 9, an a-phase copper bar 10, a B-phase copper bar 11 and a C-phase copper bar 12, the copper bars 10, 11 and 12 are turning bus copper bars, each phase is provided with a fixing foot which is respectively connected with an upper opening of the circuit breaker, the copper bar 10 fixing foot is turned inwards in the cabinet, the copper bar 11 fixing foot is not turned, the copper bar 12 fixing foot is turned outwards in the cabinet, so that the interphase can be staggered in layers, the interphase insulator 9 can ensure that the copper bars can be pulled mutually, the structure is more reliable, the tail of each phase of the copper bars 10, 11 and 12 is overlapped with the vertical copper bar 6 in a bending and turning mode, each phase is a bus copper bar, and the bus copper bar has good conductive performance without cable connection.

As shown in fig. 3, the detailed inter-phase distances of the copper bars 10, 11 and 12 are far greater than the safe electrical distance by the way of turning the copper bars, and the insulator 9 is arranged between the copper bars, so that the risk of arc discharge can be completely prevented, and the heat dissipation requirement between the copper bars can be ensured.

As shown in fig. 4, the detailed copper bar assembly structure of the second circuit breaker group 4 in the cabinet body is the same as the copper bar layered arrangement mode in fig. 2, and can be regarded as that a module assembly is assembled outside the cabinet in advance, and then the whole circuit breaker group 4 is assembled into the cabinet, and the installation structure of the circuit breaker group 4 is simple and convenient, and is formed by assembling a mounting plate 13, a large circuit breaker 14, a plurality of small circuit breakers 15, an insulator 16, an a-phase copper bar 17, a B-phase copper bar 18 and a C-phase copper bar 19.

As shown in fig. 5, the output copper bar 23 is a load connection end of the circuit breaker 14, the conductive terminal 24 is a load connection end of the circuit breaker 15, load connection terminals of other switches are not shown in the drawing, and the connection scheme of the output copper bar 23 or the conductive terminal 24 can be selected according to the size of the field cable. The cabinet zero row 25 is provided with a plurality of holes with different sizes, so that flexible wiring can be realized, and the grounding row 26 protects personal safety and ensures normal operation of equipment.

As shown in fig. 6, the top of the screen is connected with the upper ends of copper bars 5-a, 5-B and 5-C to overlap A, B, C phases of the busbar 2 respectively, the lower ends are connected with the vertical copper bars 6-a, 6-B and 6-C respectively, when the circuit breaker is assembled into 3 groups of cabinets, copper bars 10, 11 and 12 overlap the vertical copper bars 6-a, 6-B and 6-C respectively, and are overlapped in a copper bar turning mode, the vertical copper bars 6 are fixed on the vertical busbar frame 27, so that the effect of fixing the copper bars can be achieved, the electrical distance between the vertical copper bars 6 can be ensured, the risk of arc discharge can be completely prevented, and the heat dissipation requirement between the copper bars can be ensured.

As shown in fig. 7, the connection schematic diagram of the full copper bar at the upper opening of the circuit breaker is that electricity is taken from the busbar 2, the copper bar 5 is switched through the screen top, and then the full copper bar is switched to the vertical copper bar 6, and the a-phase copper bar 10, the B-phase copper bar 11, the C-phase copper bar 12 in the circuit breaker group 3 and the a-phase copper bar interface 20, the B-phase copper bar interface 21 and the C-phase copper bar interface 22 in the circuit breaker group 4 are respectively overlapped to the vertical copper bar 6, so that the full conduction of the circuit is realized.

The second embodiment is that the full copper bar circuit breaker group cabinet comprises a cabinet body, a screen top busbar with an alternating current incoming line penetrating through the screen top of the cabinet body is arranged above the cabinet body, a plurality of circuit breaker groups arranged in a row are arranged in the cabinet body, different circuit breaker groups are connected through vertical copper bars, the screen top busbar is connected with the uppermost circuit breaker group in the cabinet body through switching copper bars, and the vertical copper bars are connected with the switching copper bars.

The specific implementation is shown in the figure. In fig. 1, a cabinet body 1 is a standard cabinet body of a national network, a plurality of circuit breaker groups can be accommodated from top to bottom in the cabinet body, a screen top busbar 2 is a busbar penetrating through a screen top of an ac incoming line cabinet, a circuit breaker group 3 is formed by installing a plurality of circuit breakers with the same shell, an installing plate and a bus copper bar in the cabinet body 1, and an upper opening of each circuit breaker is connected with the copper bar through bolts to form a circuit breaker group. The breaker group 4 is formed by installing a plurality of shell breakers with different sizes, a mounting plate and a bus copper bar in the cabinet body 1, and the upper opening of each breaker is connected with the copper bar through bolts. The switching copper bar 5 on the screen top is a copper bar which is overlapped and converted from the busbar. The vertical copper bar 6 is a vertically lapped copper bar from top to bottom, and the vertical copper bar 6 connects the screen top switching copper bar 5 with the breaker groups 3 and 4 of each section.

As shown in fig. 2, the detailed copper bar assembling structure of the circuit breaker group 3 can be regarded as that a module assembly is assembled outside the cabinet in advance, then the whole circuit breaker group 3 is assembled into the cabinet, the installation structure of the circuit breaker group 3 is simple and convenient, the circuit breaker group 3 is assembled by a mounting plate 7, a circuit breaker 8, an insulator 9, an a-phase copper bar 10, a B-phase copper bar 11 and a C-phase copper bar 12, the copper bars 10, 11 and 12 are turning bus copper bars, each phase is provided with a fixing foot which is respectively connected with an upper opening of the circuit breaker, the copper bar 10 fixing foot is turned inwards, the copper bar 11 fixing foot is not turned, the copper bar 12 fixing foot is turned outwards, so that the interphase can be staggered in layers, the interphase insulator 9 can ensure that the copper bars can be pulled mutually, the structure is more reliable, the tail parts of each phase of the copper bars 10, 11 and 12 are also overlapped with the vertical copper bar 6 in a bending mode in a layering manner, each phase is made of copper bar 10, 11 and 12 adopts red copper, and the copper bar has good conductive performance without cable connection.

As shown in fig. 4, the detailed copper bar assembling structure of the circuit breaker group 4 is the same as the copper bar layering arrangement mode in fig. 2, and can be regarded as that a module assembly is assembled outside the cabinet in advance, and then the whole circuit breaker group 4 is assembled into a cabinet, and the circuit breaker group 4 is simple and convenient in mounting structure, and is assembled by a mounting plate 13, a circuit breaker 14, a plurality of circuit breakers 15, insulators 16, a phase copper bar 17, a phase copper bar 18 and a phase copper bar 19.

In the embodiment, the surface of the copper bar is specially treated, and the upper opening of the circuit breaker is not connected by a cable so as to improve the conductivity and corrosion resistance of the circuit breaker. Meanwhile, all copper bars are made of red copper, the red copper has high electrical conductivity and thermal conductivity, the electrical conductivity effect of the whole copper bars can be guaranteed by using the red copper, and the heat dissipation requirement among the copper bars can be guaranteed.

Although the present invention has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present invention.

Claims

1. An all-copper busbar circuit breaker cabinet, comprising a cabinet body, a top busbar disposed above the cabinet body for AC incoming lines to pass through the top of the cabinet body; a plurality of circuit breaker groups arranged in rows within the cabinet body, with different circuit breaker groups connected by vertical copper busbars; a top busbar connected to the topmost circuit breaker group within the cabinet body by a transfer copper busbar; and a vertical copper busbar connected to the transfer copper busbar.

2. The all-copper-barrel circuit breaker cabinet according to claim 1, characterized in that the circuit breaker group includes a mounting plate installed horizontally inside the cabinet, with multiple circuit breakers installed on the mounting plate; the three-phase interfaces above the circuit breakers are connected together by busbars; the busbars include A-phase copper bar, B-phase copper bar, and C-phase copper bar; the busbar of the topmost circuit breaker group inside the cabinet is connected to the transfer copper bar, and the busbars of the other circuit breaker groups are connected to the vertical copper bar.

3. The all-copper-barrel circuit breaker cabinet according to claim 2, characterized in that fixed feet with a bent structure are provided at the connection between the busbar and the transfer copper busbar or the vertical copper busbar. The fixed feet of the A-phase copper busbar are bent toward the inside of the cabinet, the fixed feet of the B-phase copper busbar are not bent, and the fixed feet of the C-phase copper busbar are bent toward the outside of the cabinet. The fixed feet of the three-phase busbar are spaced apart by a distance greater than the safe electrical distance.

4. The all-copper busbar circuit breaker cabinet according to claim 2 or 3, characterized in that insulators are provided at intervals on the busbars to ensure the electrical gap between the three-phase busbars and to fix the three-phase busbars.

5. The all-copper busbar circuit breaker cabinet according to claim 2, wherein each circuit breaker is equipped with an output copper busbar or a conductive terminal as a load connection port, and the load connection port is arranged on the back of the cabinet.

6. The all-copper busbar circuit breaker cabinet according to claim 1, characterized in that a vertical busbar frame is provided at the connection between the vertical copper busbar and the transfer copper busbar, and the vertical busbar frame fixes the copper busbar to ensure the electrical distance between the copper bars.

7. The all-copper busbar circuit breaker cabinet according to claim 1, characterized in that fixing brackets are provided on both sides of the cabinet body, and the circuit breaker group is connected to the fixing brackets of the cabinet body through fixing screws on the mounting plate.

8. The all-copper busbar circuit breaker cabinet according to claim 1, wherein the circuit breaker group is assembled outside the cabinet, fixed by screws after being installed into the cabinet, and then the fixing feet of the three-phase busbar are connected to the vertical copper busbar or the transfer copper busbar.

9. The all-copper busbar circuit breaker cabinet assembly according to claim 1, characterized in that a cabinet zero bar and a ground bar are provided at the bottom of the cabinet, and the cabinet zero bar is provided with a plurality of holes of different sizes.

10. The all-copper busbar circuit breaker cabinet according to claim 2, wherein the busbar is connected to the three-way connection interface above the circuit breaker by bolts.