Outdoor three-phase voltage adjusting cabinet

Abstract

The utility model relates to an outdoor three-phase voltage regulating cabinet, which comprises a cabinet body, a three-phase voltage regulator, a plurality of single-phase compensation transformers and a three-pole bypass switch, the three-phase voltage regulator, the plurality of single-phase compensation transformers and the three-pole bypass switch are mounted in the cabinet body, and the three-phase voltage regulator is respectively connected with the plurality of single-phase compensation transformers and the three-pole bypass switch. Compared with the prior art, the device has the advantages of flexibility in adjustment, no maintenance, long service life and the like.

Description

Technical Field

[0001] The utility model relates to a voltage regulating cabinet, in particular to a three-phase voltage regulating cabinet used outdoors. Background Art

[0002] In many industrial and commercial applications, a stable voltage supply is essential for the normal operation of equipment and systems. However, due to grid fluctuations, load changes and other factors, the voltage in the grid is often unstable, which may cause equipment damage, production interruptions and safety hazards.

[0003] To solve this problem, voltage regulators are widely used to stabilize the voltage supply. Voltage regulators are devices that monitor the voltage of the power grid and adjust it as needed. They usually achieve voltage stability by automatically adjusting the output voltage of the transformer.

[0004] However, conventional voltage regulators have some limitations in terms of flexibility, especially for single-phase, which usually cannot meet the requirements of actual application scenarios.

[0005] In addition, the existing regulating devices for outdoor use are exposed to outdoor environment on a daily basis, and unstable environmental factors will also cause the regulating devices to require constant maintenance and have a short service life. Summary of the invention

[0006] The purpose of the utility model is to provide a three-phase voltage regulating cabinet for outdoor use which can solve the problem of outdoor voltage flexibility regulation.

[0007] The purpose of the utility model can be achieved through the following technical solutions:

[0008] A three-phase voltage regulating cabinet for outdoor use comprises a cabinet body and a three-phase voltage regulator, a plurality of single-phase compensating transformers and a three-pole bypass switch installed in the cabinet body, wherein the three-phase voltage regulator is respectively connected to the plurality of single-phase compensating transformers and the three-pole bypass switch.

[0009] Furthermore, the cabinet body includes protective panels on the four sides, the top and the bottom, one of the protective panels on the four sides is hinged to the cabinet body, the upper protective panel is provided with an air outlet, the lower protective panel is provided with an air inlet, and support blocks are provided on opposite sides of the lower protective panel.

[0010] Furthermore, ventilation mesh covers are provided on the protection plates on two opposite sides around the cabinet body.

[0011] Furthermore, the cabinet body also includes a top cover arranged on the upper protection plate.

[0012] Furthermore, the top cover includes a box body in contact with the upper protective plate and an upper cover covering the box body, the bottom area of ​​the box body is larger than the area of ​​the upper protective plate, and a plurality of heat dissipation holes are arranged around the bottom of the box body.

[0013] Furthermore, the upper cover is in an inverted "V" shape.

[0014] Furthermore, the cabinet body is made of stainless steel.

[0015] Furthermore, hanging rings are installed on the protection plates on two opposite sides of the cabinet body.

[0016] Furthermore, an insulating plate is provided between the single-phase compensating transformer and the three-phase voltage regulator.

[0017] Furthermore, the three-phase voltage regulator is a PWM three-phase voltage regulator.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] (1) The voltage regulation process of the utility model is carried out in the cabinet body and can be applied to various outdoor environments. The combination of a three-phase voltage regulator, multiple single-phase compensating transformers and a three-pole bypass switch enables the three-phase voltage regulator to obtain a compensation voltage for adjustment according to voltage fluctuations. Multiple single-phase compensating transformers superimpose the output voltage of the three-phase voltage regulator with the input voltage to keep the output voltage stable. The three-pole bypass switch can switch the output end of the compensation transformer to a bypass state, thereby making the output voltage directly connected to the input voltage. When the three-phase voltage regulator is not working, the equipment is continuously supplied with voltage.

[0020] (2) The voltage regulating cabinet of the utility model is provided with a plurality of ventilation mesh covers and heat dissipation holes, which can discharge the heat in the cabinet body, ensure the stable operation of the voltage regulating cabinet, and increase the service life.

[0021] (3) The utility model is also provided with a top cover. The inverted "V"-shaped top cover is not only not easy to accumulate objects such as rain and snow, but also prevents such objects from entering the cabinet and damaging the normal operation of the internal equipment. Therefore, the utility model is maintenance-free. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall structure of the three-phase voltage regulating cabinet of the utility model;

[0023] Figure 2 This is a schematic diagram of the air outlet structure of a part of the three-phase voltage regulating cabinet of the utility model;

[0024] Figure 3 It is a schematic diagram of the heat dissipation holes and the lifting ring structure of a part of the three-phase voltage regulating cabinet of the utility model;

[0025] Figure 4 This is a schematic diagram of the internal ventilation direction of the three-phase voltage regulating cabinet of the utility model;

[0026] Figure 5 It is a schematic diagram of the bottom structure of the three-phase voltage regulating cabinet of the utility model. DETAILED DESCRIPTION

[0027] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and a specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0028] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0029] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0030] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] The utility model provides a three-phase voltage regulating cabinet for outdoor use, such as Figure 1 As shown, the three-phase voltage regulating cabinet includes a cabinet body 1 and a three-phase voltage regulator 2, a plurality of single-phase compensating transformers 3 and a three-pole bypass switch 4 installed in the cabinet body 1, wherein the three-phase voltage regulator 2 is respectively connected to the plurality of single-phase compensating transformers 3 and the three-pole bypass switch 4. The three-phase voltage regulator 2 of the utility model is a PWM three-phase voltage regulator, the single-phase compensating transformer 3 adopts the SCBH series model, and the three-pole bypass switch 4 adopts the HA series model.

[0032] The cabinet body 1 is composed of protective plates 11 on the sides, top and bottom. The protective plates 11 are made of stainless steel and can cope with various weather conditions outside. They can well protect the internal structure from external interference. The three-phase voltage regulator 2, multiple single-phase compensation transformers 3 and three-pole bypass switch 4 in the three-phase voltage regulating cabinet will generate a lot of heat during operation. In order to protect the regulating cabinet to operate safely and stably for a long time, it is necessary to remove the internal heat. In this embodiment, a ventilation mesh cover 114 is set on the protective plate 11 on the opposite side of the cabinet body 1. In order to discharge more heat to a greater extent, such as Figure 2 As shown, the upper protective plate 11 is also provided with an air outlet 111, and the lower protective plate 11 is provided with support blocks 113 on opposite sides. The support blocks 113 can be set as a perforated structure, and the lower protective plate 11 is provided with a plurality of air inlet holes 112. The structure of the air inlet holes is as shown in FIG. Figure 5 As shown. Figure 3 As shown, the regulating cabinet of this embodiment is further provided with a top cover 12 on the upper protection plate 11, and the top cover 12 includes a box body 121 in contact with the upper protection plate 11 and an upper cover 122 covering the box body 121. The bottom area of ​​the box body 121 is larger than the area of ​​the upper protection plate 11, so the bottom edge of the box body 121 is located outside the upper protection plate 11, and is used to be provided with a plurality of heat dissipation holes 7. Figure 4 As shown, through the above arrangement, the heat inside the cabinet body 1 is transported to the air outlet 111 through the internal ventilation duct, and the heat can not only be discharged to the external environment through the multiple heat dissipation holes 7 around, but also prevent rain, snow, etc. from entering the regulating cabinet to damage the operation of the internal equipment. In addition, the upper cover 122 is an inverted "V" shape, which can prevent the upper cover 122 from accumulating objects such as water that affect the operation of the regulating cabinet.

[0033] like Figure 2 As shown, the protective plates 11 around the cabinet body 1 of the utility model are also provided with lifting rings 5, which can be used to facilitate transportation and lifting to move the regulating cabinet to any position.

[0034] In addition, an insulating plate 6 is provided between the single-phase compensation transformer 3 and the three-phase voltage regulator 2 to prevent the heat of the transformer from affecting the three-phase voltage regulator 2 .

[0035] The working principle of the three-phase voltage regulator 2, multiple single-phase compensation transformers 3 and three-pole bypass switch 4 inside the above three-phase voltage regulating cabinet is:

[0036] The three-phase voltage regulator 2 is used to monitor the change of input voltage when the power supply voltage fluctuates, and to obtain a suitable compensation voltage (the difference between the output voltage and the set voltage) by adjusting its output. Multiple single-phase compensation transformers 3 are used to superimpose the voltage output by the three-phase voltage regulator with the input voltage, thereby maintaining a stable output voltage. The three-pole bypass switch 4 can switch the output end of the compensation transformer to a bypass state, so that the output voltage is directly connected to the input voltage, and when the three-phase voltage regulator is not working, the equipment is continuously supplied with voltage.

[0037] The three-phase voltage regulating cabinet described above can be used for outdoor voltage regulation process.

[0038] The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should be within the scope of protection determined by the claims.

Claims

1. A three-phase voltage regulating cabinet for outdoor use, characterized in that: The invention comprises a cabinet body (1), and a three-phase voltage regulator (2), a plurality of single-phase compensating transformers (3) and a three-pole bypass switch (4) installed in the cabinet body (1); the three-phase voltage regulator (2) is respectively connected to the plurality of single-phase compensating transformers (3) and the three-pole bypass switch (4).

2. A three-phase voltage regulating cabinet for outdoor use according to claim 1, characterized in that: The cabinet body (1) comprises protective plates (11) on the periphery, the top and the bottom, one of the protective plates (11) on the periphery is hinged to the cabinet body (1), the upper protective plate (11) is provided with an air outlet (111), the lower protective plate (11) is provided with an air inlet (112), and supporting blocks (113) are provided on opposite sides of the lower protective plate (11).

3. A three-phase voltage regulating cabinet for outdoor use according to claim 2, characterized in that: Ventilation mesh covers (114) are provided on the protective plates (11) on two opposite sides of the cabinet body (1).

4. A three-phase voltage regulating cabinet for outdoor use according to claim 2, characterized in that: The cabinet body (1) further comprises a top cover (12) arranged on the upper protection plate (11).

5. A three-phase voltage regulating cabinet for outdoor use according to claim 4, characterized in that: The top cover (12) comprises a box body (121) in contact with the upper protection plate (11) and an upper cover (122) covering the box body (121); the bottom area of ​​the box body (121) is larger than the area of ​​the upper protection plate (11); and a plurality of heat dissipation holes (7) are provided around the bottom of the box body (121).

6. A three-phase voltage regulating cabinet for outdoor use according to claim 5, characterized in that: The upper cover (122) is in an inverted "V" shape.

7. The three-phase voltage regulating cabinet for outdoor use according to claim 1, characterized in that: The cabinet body (1) is made of stainless steel.

8. The three-phase voltage regulating cabinet for outdoor use according to claim 2, characterized in that: Lifting rings (5) are installed on the protection plates (11) on two opposite sides of the cabinet body (1).

9. The three-phase voltage regulating cabinet for outdoor use according to claim 1, characterized in that: An insulating plate (6) is provided between the single-phase compensating transformer (3) and the three-phase voltage regulator (2).

10. The three-phase voltage regulating cabinet for outdoor use according to claim 1, characterized in that: The three-phase voltage regulator (2) is a PWM type three-phase voltage regulator.

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