A large power electrical equipment phase modulation device and a power distribution cabinet comprising the same

Abstract

The utility model discloses a kind of high-power electrical equipment phase modulation devices, including three phase modulation components, each phase modulation component includes top incoming line cable connection copper bar, middle phase modulation connection copper bar and bottom circuit breaker incoming line connection copper bar;The top incoming line cable connection copper bar upper end is fixed in the equipment power cabinet inner total circuit breaker upper end through insulator, lower end is connected with the middle phase modulation connection copper bar;The bottom circuit breaker incoming line connection copper bar lower end is connected with equipment power cabinet total circuit breaker incoming line terminal, upper end is connected with the middle phase modulation connection copper bar, so that when project site actual city power phase sequence and equipment shipment test electricity phase sequence are different, the movable end of the middle phase modulation connection copper bar can be adjusted, the connection mode of the top incoming line cable connection copper bar and the bottom circuit breaker incoming line connection copper bar is changed, and motor phase sequence is consistent.The utility model also discloses a kind of power distribution cabinet containing high-power electrical equipment phase modulation device.

Description

Technical Field

[0001] This utility model belongs to the field of power supply and distribution equipment technology, and more specifically relates to a phase adjustment device for high-power electrical equipment and a power distribution cabinet containing the same. Background Technology

[0002] The phase sequence of the power supply is a crucial factor determining the forward and reverse rotation of a motor in a power supply system. The correctness of the phase sequence plays a vital role. When the three phases (A, B, and C) of the power supply are in the correct sequence, the motor rotates forward; when the three phases are in the wrong sequence, the motor rotates in reverse. Reverse rotation of the motor can cause significant damage, ranging from minor malfunctions in the internal protection circuits of individual devices to, in severe cases, tripping the main switch in the power distribution room and disrupting workshop production. Therefore, high-power equipment is equipped with phase sequence protectors. When the power supply phase sequence is incorrect, the phase sequence protector activates, preventing the equipment from starting.

[0003] The aforementioned equipment startup failure occurs when the power phase sequence used for factory commissioning is inconsistent with the power phase sequence at the project site. Current solutions typically involve adjusting the phase sequence of the incoming power cables at the project site. However, to ensure the cable's mechanical strength and current carrying capacity, hard-wired cables must be used. During the phase sequence adjustment process, the cable phase positions need to be moved twice, and the length of the grafted power cable ends needs to be adjusted. This can easily damage the cable's protective layer, and the grafted cable joints are prone to generating higher heat, shortening the power cable's service life.

[0004] A search revealed a Chinese utility model patent document (application number 202020944220.0) disclosing a three-phase motor phase-adjusting device, comprising a housing, a first A-phase node, a second A-phase node, a first common node, a second common node, a first C-phase node, a second C-phase node, a first phase-adjusting switch, and a second phase-adjusting switch; both the first and second phase-adjusting switches are single-pole double-throw switches; the housing is provided with A-phase input terminals, B-phase input terminals, C-phase input terminals, a first output terminal, a second output terminal, and a third output terminal. By setting up a phase-switching circuit and using the single-pole double-throw first and second phase-adjusting switches, the output phase sequence of the first and second output terminals is adjusted, quickly realizing the interchange of the two phase sequences of the motor power supply, thereby achieving rapid adjustment of the motor phase sequence.

[0005] While the aforementioned technical solution addresses the issue of rapid phase sequence adjustment, the use of a single-pole double-throw switch increases space requirements. Furthermore, once the phase sequence is determined, frequent adjustments are unnecessary, wasting some of the single-pole double-throw switch's functionality and increasing economic costs. This invention provides an alternative power electric phase-adjusting device that is simple to operate and low in cost. Utility Model Content

[0006] 1. Technical problem to be solved by the utility model

[0007] The purpose of this utility model is to provide another phase adjustment device for high-power electrical equipment. When the phase sequence of the factory-tested equipment does not match the actual phase sequence on site, the phase adjustment device can be used to directly adjust the phase of the incoming power supply, avoiding rework in the construction of power cables and ensuring electrical safety, and guaranteeing normal start-up of the equipment.

[0008] 2. Technical Solution

[0009] To achieve the above objectives, this utility model provides the following technical solution:

[0010] This utility model provides a phase adjustment device for high-power electrical equipment, which includes three phase adjustment components. Each phase adjustment component includes a top incoming cable connecting copper busbar, a middle phase adjustment connecting copper busbar, and a bottom circuit breaker incoming line connecting copper busbar.

[0011] The upper end of the top incoming cable connecting copper busbar is fixed to the upper end of the main circuit breaker inside the equipment power cabinet via an insulator, and the lower end is connected to the middle phase-adjusting connecting copper busbar;

[0012] The lower end of the bottom circuit breaker incoming line connecting copper busbar is connected to the incoming line terminal of the main circuit breaker of the equipment power cabinet, and the upper end is connected to the middle phase adjustment connecting copper busbar;

[0013] At least one end of two or three of the three phase-adjusting components in the middle phase-adjusting connecting copper busbars is movably connected to the top incoming cable connecting copper busbar and / or the bottom circuit breaker incoming connecting copper busbar, so that when the actual mains phase sequence at the project site is different from the phase sequence of the equipment used for factory testing, the movable end of the middle phase-adjusting connecting copper busbar can be adjusted to change the connection method between the top incoming cable connecting copper busbar and the bottom circuit breaker incoming connecting copper busbar, so as to achieve consistency of the motor phase sequence.

[0014] Furthermore, the two ends of two or three of the middle phase-adjusting connecting copper busbars in the three phase-adjusting components are respectively movably connected to the top incoming cable connecting copper busbar and the bottom circuit breaker incoming connecting copper busbar.

[0015] Furthermore, the upper ends of two or three of the three phase-adjusting components are movably connected to the top incoming cable connecting copper busbar, and the lower ends are fixedly connected to the bottom circuit breaker incoming copper busbar.

[0016] Furthermore, the upper ends of two or three of the three phase-adjusting components are fixedly connected to the top incoming cable connecting copper busbar, and the lower ends are movably connected to the bottom circuit breaker incoming copper busbar.

[0017] Furthermore, at least one of the phase-connecting copper strands in the middle of the active connection is bent in the middle.

[0018] Furthermore, the curved central phase-connecting copper busbar is arc-shaped.

[0019] Furthermore, at least one end of the central phase-adjusting connecting copper busbar has two or three copper busbars that are movably connected and are bent in the middle, and the bending directions between adjacent bent central input copper busbars are opposite.

[0020] Furthermore, the curved central phase-connecting copper busbar is arc-shaped.

[0021] Furthermore, when the middle phase-adjusting connecting copper busbar is movably connected to the top incoming cable connecting copper busbar and / or the bottom circuit breaker incoming connecting copper busbar, a detachable movable bolt connection method is used for the connection.

[0022] This utility model also relates to a power distribution cabinet, which includes the aforementioned high-power electrical equipment phase adjustment device.

[0023] 3. Beneficial effects

[0024] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0025] (1) A phase-adjusting device for high-power electrical equipment according to this utility model includes three phase-adjusting components. Each phase-adjusting component includes a top incoming cable connecting copper busbar, a middle phase-adjusting connecting copper busbar, and a bottom circuit breaker incoming line connecting copper busbar. The upper end of the top incoming cable connecting copper busbar is fixed to the upper end of the main circuit breaker in the power cabinet of the equipment via an insulator, and the lower end is connected to the middle phase-adjusting connecting copper busbar. The lower end of the bottom circuit breaker incoming line connecting copper busbar is connected to the incoming terminal of the main circuit breaker in the power cabinet of the equipment, and the upper end is connected to the middle phase-adjusting connecting copper busbar. At least one end of two or three of the middle phase-adjusting connecting copper busbars in the three phase-adjusting components is movably connected to the top incoming cable connecting copper busbar and / or the bottom circuit breaker incoming line connecting copper busbar, so that when the actual mains phase sequence at the project site is different from the phase sequence of the equipment used for factory testing, the movable end of the middle phase-adjusting connecting copper busbar can be adjusted to change the connection method between the top incoming cable connecting copper busbar and the bottom circuit breaker incoming line connecting copper busbar, so as to achieve consistency of the motor phase sequence.

[0026] (2) The phase adjustment device for high-power electrical equipment of this utility model has at least one end of a movable connection of two or three middle phase adjustment connecting copper busbars that are bent in the middle, and the bending directions of adjacent bent middle incoming line connecting copper busbars are opposite. When adjusting the phase sequence, the distance between the points of intersection is far, which can effectively avoid interference between phases. Attached Figure Description

[0027] Figure 1 This is a front view schematic diagram of the phase adjustment device for high-power electrical equipment according to this utility model;

[0028] Figure 2 This is a side view schematic diagram of the phase adjustment device for high-power electrical equipment according to this utility model;

[0029] Figure 3 This is a schematic diagram of the phase adjustment device for high-power electrical equipment according to this utility model.

[0030] The numbers in the diagram are explained as follows: 1. Top incoming cable connecting copper busbar; 2. Middle phase adjustment connecting copper busbar; 3. Bottom circuit breaker incoming cable connecting copper busbar. Detailed Implementation

[0031] To enable those skilled in the art to better understand this technical solution, the technical solution of this utility model will be clearly and completely described below in conjunction with the accompanying drawings and embodiments.

[0032] The structures, proportions, and sizes illustrated in the accompanying drawings are merely for illustrative purposes and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of this invention, should still fall within the scope of the disclosed technical content. Furthermore, terms such as "bottom," "top," "upper end," "lower end," "inlet," and "outlet" used in this specification are merely for clarity and not intended to limit the scope of implementation. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0033] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] like Figures 1 to 3 As shown in the figure, a phase adjustment device for high-power electrical equipment according to an embodiment of the present invention includes three phase adjustment components. Each phase adjustment component includes a top incoming cable connecting copper busbar 1, a middle phase adjustment connecting copper busbar 2, and a bottom circuit breaker incoming cable connecting copper busbar 3. The upper end of the top incoming cable connecting copper busbar 1 is fixed to the upper end of the main circuit breaker in the equipment power cabinet via an insulator, and the lower end is connected to the middle phase adjustment connecting copper busbar 2. The lower end of the bottom circuit breaker incoming cable connecting copper busbar 3 is connected to the incoming terminal of the main circuit breaker in the equipment power cabinet, and the upper end is connected to the middle phase adjustment connecting copper busbar 2.

[0035] At least one end of two or three of the three phase-adjusting components of the middle phase-adjusting connecting copper busbar 2 is movably connected to the top incoming cable connecting copper busbar 1 and / or the bottom circuit breaker incoming line connecting copper busbar 3, so that when the actual mains phase sequence at the project site is different from the phase sequence of the equipment used for factory testing, the movable end of the middle phase-adjusting connecting copper busbar 2 can be adjusted to change the connection method between the top incoming cable connecting copper busbar 1 and the bottom circuit breaker incoming line connecting copper busbar 3, so as to achieve consistency of motor phase sequence.

[0036] Two or three of the three phase-adjusting components are respectively movably connected at both ends to the top incoming cable connecting copper busbar 1 and the bottom circuit breaker incoming connecting copper busbar 3.

[0037] The upper end of the middle phase-adjusting connecting copper busbar 2 is movably connected to the top incoming cable connecting copper busbar 1, and the lower end is fixedly connected to the bottom circuit breaker incoming cable connecting copper busbar 3.

[0038] The upper end of the middle phase-adjusting connecting copper busbar 2 is fixedly connected to the top incoming cable connecting copper busbar 1, and the lower end is movably connected to the bottom circuit breaker incoming cable connecting copper busbar 3.

[0039] Typically, three-phase power supplies are designated A-phase, B-phase, and C-phase, with A-phase indicated in yellow, B-phase in green, and C-phase in red. Under normal conditions, the phase sequence of the top ABC phases of the phase-adjusting device is consistent with that of the bottom ABC phases. When it is necessary to adjust the three-phase sequence of the power supply, without changing the position of the power cable, extending the length of the power cable end, or altering the internal structure of the equipment, the phase sequence operation can be completed by simply changing the connection method of two phases in the corresponding middle phase-adjusting connecting copper busbar 2, such as the connection method of phases B and C. Specifically, the connection relationship between the middle phase-adjusting connecting copper busbar 2 and the top incoming cable connecting copper busbar 1 (phases B and C) can be adjusted, or the connection relationship between the middle phase-adjusting connecting copper busbar 2 and the bottom circuit breaker incoming cable connecting copper busbar 3 (phases B and C) can be adjusted. In this case, the middle phase-adjusting connecting copper busbars for phases B and C are slightly longer than the middle phase-adjusting connecting copper busbar for phase A, just enough to meet the requirements of cross-connection.

[0040] Similarly, changing only the connection between phases A and B can also achieve the effect of adjusting the phase sequence. Even changing only the connection between phases A and C can achieve the same effect, but in this case, because phase B separates phases A and C, the operation is cumbersome and unnecessary, and this method of phase adjustment is rarely used in practice.

[0041] When phase adjustment is required, the central phase adjustment connecting copper busbar 2 is covered with insulating material, such as heat-shrink insulating sleeve or barley paper. After phase adjustment, the intersection area of ​​the two connecting copper busbars can also ensure the standard insulation strength, ensuring electrical safety.

[0042] The power phase adjustment device is installed at the upper inlet of the main circuit breaker of the equipment distribution cabinet. By setting the phase adjustment device inside the equipment power cabinet, when the phase sequence of the factory-tested power supply does not match the actual phase sequence on site, the phase adjustment device can be used to directly adjust the phase of the incoming power supply, avoiding rework of power cable construction and ensuring electrical safety, and guaranteeing normal start-up and commissioning of the equipment.

[0043] Preferably, one of the central phase-adjusting connecting copper busbars 2 is curved in the middle; the curved central phase-adjusting connecting copper busbar 2 is arc-shaped. One of the central phase-adjusting connecting copper busbars is curved in the middle, while the other two are straight. When the two connecting copper busbars cross, the distance between them increases, which can achieve a better insulation effect. When the distance is large enough, the copper busbar surface can achieve the insulation effect without being covered with insulating material.

[0044] Furthermore, at least two of the central phase-adjusting connecting copper busbars 2 are bent in the middle, and the bending directions of adjacent bent central phase-adjusting connecting copper busbars 2 are opposite; the bent central phase-adjusting connecting copper busbars 2 are arc-shaped. In this case, when the two rows of copper wires cross, the distance between them is greater, and a better insulation effect can be achieved without covering with insulating material.

[0045] When the middle phase-adjusting connecting copper busbar 2 is movably connected to the top incoming cable connecting copper busbar 1 and / or the bottom circuit breaker incoming cable connecting copper busbar 3, a detachable movable bolt connection method is used. In this case, the middle phase-adjusting connecting copper busbar 2 has multiple matching fixing bolt holes at the connection points with the top incoming cable connecting copper busbar 1 and the bottom circuit breaker incoming cable connecting copper busbar 3. The detachable movable bolt connection method simplifies disassembly and installation, and facilitates replacement if components are damaged, thus improving the utilization rate of components.

[0046] The back of the top incoming cable connecting copper busbar 1 and the bottom circuit breaker incoming cable connecting copper busbar 3 are connected to the equipment power cabinet keel via insulated terminals.

[0047] Another aspect of this utility model relates to a power distribution cabinet, which includes the aforementioned high-power electrical equipment phase adjustment device, which can realize rapid phase sequence adjustment.

[0048] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. If any person skilled in the art, inspired by this description, designs a similar structure to the present invention without departing from its inventive spirit, such design shall fall within the protection scope of the present invention.

Claims

1. A phase-adjusting device for high-power electrical equipment, comprising three phase-adjusting components, characterized in that, Each phase-shifting assembly includes a top incoming cable connection copper busbar (1), a middle phase-shifting connection copper busbar (2), and a bottom circuit breaker incoming cable connection copper busbar (3); The upper end of the top incoming cable connecting copper busbar (1) is fixed to the upper end of the main circuit breaker in the equipment power cabinet via an insulator, and the lower end is connected to the middle phase-adjusting connecting copper busbar (2); The lower end of the bottom circuit breaker incoming line connecting copper busbar (3) is connected to the incoming line terminal of the main circuit breaker of the equipment power cabinet, and the upper end is connected to the middle phase adjustment connecting copper busbar (2); At least one end of two or three of the three phase-adjusting components of the middle phase-adjusting connecting copper busbars (2) is movably connected to the top incoming cable connecting copper busbar (1) and / or the bottom circuit breaker incoming connecting copper busbar (3), so that when the actual mains phase sequence at the project site is different from the phase sequence of the equipment for factory testing, the movable end of the middle phase-adjusting connecting copper busbar (2) can be adjusted to change the connection method between the top incoming cable connecting copper busbar (1) and the bottom circuit breaker incoming connecting copper busbar (3) to achieve consistency of motor phase sequence.

2. The phase adjustment device for high-power electrical equipment according to claim 1, characterized in that, The two ends of two or three of the three phase-adjusting components of the middle phase-adjusting connecting copper busbar (2) are respectively movably connected to the top incoming cable connecting copper busbar (1) and the bottom circuit breaker incoming connecting copper busbar (3).

3. The phase adjustment device for high-power electrical equipment according to claim 1, characterized in that, The upper ends of two or three of the three phase-adjusting components of the middle phase-adjusting connecting copper busbar (2) are movably connected to the top incoming cable connecting copper busbar (1), and the lower ends are fixedly connected to the bottom circuit breaker incoming line connecting copper busbar (3).

4. The phase adjustment device for high-power electrical equipment according to claim 1, characterized in that, The upper ends of two or three of the three phase-adjusting components of the middle phase-adjusting connecting copper busbar (2) are fixedly connected to the top incoming cable connecting copper busbar (1), and the lower ends are movably connected to the bottom circuit breaker incoming connecting copper busbar (3).

5. The phase-adjusting device for high-power electrical equipment according to any one of claims 2 to 4, characterized in that, One of the copper busbars (2) with at least one active connection in the middle is bent in the middle.

6. A phase-adjusting device for high-power electrical equipment according to claim 5, characterized in that, The curved central phase-connecting copper busbar (2) is arc-shaped.

7. The phase-adjusting device for high-power electrical equipment according to any one of claims 2 to 4, characterized in that, At least one end of the middle phase-adjusting connecting copper busbar (2) is connected in a movable manner. Two or three of them are bent in the middle, and the bending directions between adjacent bent middle input copper busbars (2) are opposite.

8. A phase-adjusting device for high-power electrical equipment according to claim 7, characterized in that, The curved central phase-connecting copper busbar (2) is arc-shaped.

9. The phase-adjusting device for high-power electrical equipment according to any one of claims 1 to 4, characterized in that, When the middle phase-adjusting connecting copper busbar (2) is movably connected to the top incoming cable connecting copper busbar (1) and / or the bottom circuit breaker incoming connecting copper busbar (3), a detachable movable bolt connection method is used for the connection.

10. A power distribution cabinet, characterized in that, Includes the phase adjustment device for high-power electrical equipment as described in any one of claims 1 to 9.

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