Dual power supply type combined switch cabinet

Abstract

The utility model relates to the technical field of switch cabinets, in particular to a dual-power-supply combined switch cabinet. The utility model provides a dual-power-supply type combined switch cabinet, which comprises a power supply cabinet used for distributing electric energy and protecting, and a soft start cabinet used for smoothly starting electric equipment and reducing starting current impact, the power supply cabinet is divided into a main power supply cabinet capable of realizing switching operation of a frequently-used power supply and a standby power supply and a sub-power supply cabinet capable of maximizing expansion of power supply branches, the main power supply cabinet and the sub-power supply cabinet are arranged side by side, and the main power supply cabinet, the sub-power supply cabinet and the soft start cabinet share one cabinet body; according to the switch cabinet, the main power supply cabinet, the sub power supply cabinet and the soft start cabinet are designed, so that the switching operation of a frequently-used power supply and a standby power supply can be realized through the main power supply cabinet, the maximum expansion of a sight line power supply shunt can be realized through the sub power supply cabinet, and the stable soft start operation of power supply equipment can be realized through the soft start cabinet.

Description

Technical Field

[0001] This application relates to the technical field of switchgear, and particularly to a dual-power combined switchgear. Background Art

[0002] With the increasing requirements for power stability in industrial and commercial facilities, the traditional single-power supply method can no longer meet modern needs.

[0003] Especially in key facilities such as hospitals and data centers, any short power interruption may cause significant losses. However, existing switchgears usually do not have the function of switching to a standby power supply to ensure the continuity and safety of power supply. Summary of the Utility Model

[0004] The problem to be solved by this application is that existing switchgears usually do not have the function of switching to a standby power supply, resulting in significant power outage losses easily occurring after power outages in some key facilities.

[0005] To solve the above technical problems, this application provides a dual-power combined switchgear, including a power cabinet for power distribution and protection, and a soft start cabinet for smoothly starting electrical equipment and reducing the impact of starting current. The power cabinet is divided into a main power cabinet capable of realizing the switching operation between the normal power supply and the standby power supply, and a sub-power cabinet capable of maximizing the expansion of power supply branches. The main power cabinet and the sub-power cabinet are arranged side by side, and the main power cabinet, the sub-power cabinet, and the soft start cabinet share a cabinet body.

[0006] Since the switchgear of this application is designed with a main power cabinet, a sub-power cabinet, and a soft start cabinet, it can not only realize the switching operation between the normal power supply and the standby power supply through the main power cabinet, but also maximize the expansion of power supply branches through the sub-power cabinet, and can also realize the smooth soft start operation of power supply equipment through the soft start cabinet, solving the problem that existing switchgears usually do not have the function of switching to a standby power supply, resulting in significant power outage losses easily occurring after power outages in some key facilities. Brief Description of the Drawings

[0007] Figure 1 It is a front view structural schematic diagram of the embodiment.

[0008] Figure 2 It is a top view structural schematic diagram of the embodiment.

[0009] Figure 3 It is a structural schematic diagram of the main power cabinet.

[0010] Figure 4 It is a structural schematic diagram of the sub-power cabinet.

[0011] Figure 5 It is a structural schematic diagram of the soft start cabinet.

[0012] In the figure: 1, main power supply cabinet; 2, sub-power supply cabinet; 3, soft start cabinet; 4, cabinet body; 5, first circuit breaker; 6, first power switch; 7, second circuit breaker; 8, third circuit breaker; 9, fourth circuit breaker; 10, second power switch; 11, fifth circuit breaker; 12, soft starter; 13, PLC controller; 14, intermediate relay. Specific embodiments

[0013] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application. Embodiment

[0014] The present application relates to a dual-power combined switchgear cabinet. As Figures 1-5 shown, the switchgear cabinet includes a power supply cabinet for distributing electric energy and protecting, and a soft start cabinet 3 for smoothly starting electrical equipment and reducing the impact of starting current. The power supply cabinet and the soft start cabinet 3 are arranged side by side in a regular manner. Thus, by combining the use of the power supply cabinet and the soft start cabinet 3, the electrical safety of the electrical equipment is ensured. In order to further improve the power supply capacity of the power supply cabinet to meet diverse power consumption requirements, therefore, the power supply cabinet is divided into a main power supply cabinet 1 that can realize the switching operation of the normal power supply and the standby power supply, and a sub-power supply cabinet 2 that can maximize the expansion of the power supply branch. The main power supply cabinet 1 and the sub-power supply cabinet 2 are arranged side by side to achieve sufficient branch power supply requirements. In order to simplify the layout structure of the switchgear cabinet and maximize the integration degree, therefore, the main power supply cabinet 1, the sub-power supply cabinet 2, and the soft start cabinet 3 share a cabinet body 4.

[0015] The main power cabinet 1 includes a first power switch 6, a first circuit breaker 5 and a second circuit breaker 7. Inside the cabinet body 4, there is a first power switch 6 for realizing the on-off function of the power supply. In order to ensure the continuity and reliability of the power supply, the first power switch 6 is selected as a dual-power switch connected to the normal power supply and the standby power supply through a busbar. Thus, when the normal power supply cannot supply power normally due to problems such as power outage, undervoltage, and overvoltage, it can automatically switch to the standby power supply to ensure uninterrupted operation in case of emergency. In order to prevent the situation that the normal power supply or the standby power supply is overloaded or short-circuited, which is likely to cause a fire, therefore, a first circuit breaker 5 with overload and short-circuit protection functions is connected in series above the busbars of the normal power supply and the standby power supply. The first circuit breaker 5 monitors the current in the circuit. When the current exceeds the rated value and lasts for a certain period of time, the switch will automatically trip and disconnect the circuit, thus preventing the wire from overheating and equipment damage caused by long-term overload. In case of a short circuit, that is, a connection with extremely low impedance appears in the circuit, the current will surge instantaneously. The first circuit breaker 5 can quickly cut off the power supply to avoid equipment damage and fire risk caused by excessive short-circuit current. Moreover, for the first circuit breaker 5 in the off state, its visible isolation break can safely isolate the circuit and ensure the safety of personnel during maintenance and installation work. At the output end of the first power switch 6, a plurality of second circuit breakers 7 connected to the power switch are arranged side by side. In order to meet the diverse needs of the power supply load, the load ratio between the first circuit breaker 5 and the plurality of second circuit breakers 7 is: 3.94:1.56:1.56:1:1:1.

[0016] The sub-power cabinet 2 includes a third circuit breaker 8 and a fourth circuit breaker 9. The third circuit breaker 8 is arranged inside the cabinet body 4 and is connected to the output end of the first power switch 6 through a busbar, thus forming a side-by-side connection with the plurality of second circuit breakers 7. In order to maximize the shunt arrangement operation within the limited space of the cabinet body 4, therefore, the output end of the third circuit breaker 8 is vertically installed and evenly and spacedly arranged with a plurality of fourth circuit breakers 9 connected to it in a mirror-symmetrical manner. In order to avoid instantaneous high-load conditions of the third circuit breaker 8, the loads between the plurality of fourth circuit breakers 9 are all the same, and the load ratio between the third circuit breaker 8 and the fourth circuit breaker 9 is 3.94:1.

[0017] The soft start cabinet 3 includes a second power switch 10, a fifth circuit breaker 11, a soft starter 12, a PLC controller 13, and an intermediate relay 14. The second power switch 10 is arranged inside the cabinet 4 and arranged side by side with the first power switch 6. The output end of the second power switch 10 is evenly and spacedly arranged with a plurality of fifth circuit breakers 11 connected side by side with the output end thereof. The cabinet 4 is also provided with a soft starter 12 for controlling the gradual start of the electrical equipment. The soft starter 12 controls the voltage and frequency of the electrical equipment to achieve precise control of the acceleration process of the electrical equipment and avoid mechanical and voltage shocks during the start-up process. The soft starter 12 is connected to the fifth circuit breaker 11 through a terminal block, and the cabinet 4 is also provided with a The cabinet 4 is provided with a PLC controller 13 connected to the soft starter 12 to adjust the starting parameters and an intermediate relay 14 for bypassing the soft starter 12. The soft starter 12 uses a three-phase anti-parallel thyristor as a voltage regulator, and the voltage is smoothly increased by controlling the conduction angle of the thyristor to achieve gradual starting of the electrical equipment, thereby effectively reducing the current impact during starting. The PLC controller 13 is responsible for the logic control of the entire starting process and can adjust the starting parameters according to different load characteristics, such as the current limit value and the starting time. The intermediate relay 14 is used to bypass the thyristor after the soft start is completed, so that the electrical equipment can operate at the rated voltage, reduce energy consumption and equipment loss, and improve system efficiency and reliability.

[0018] The front of the cabinet 4 is arranged with three cabinet doors with a horizontal outward-folding structure, and the bottom of the cabinet 4 is arranged with a base with a ground-supporting function. Since a large amount of heat energy will be generated inside the cabinet 4 during the operation of the switch cabinet, in order to improve the heat dissipation capacity of the cabinet 4, meshes with height differences for ventilation and heat dissipation are arranged on both sides of the cabinet 4.

[0019] During use, the main power supply cabinet 1 can switch from the normal power supply to the backup power supply in a timely and rapid manner through the power switch arranged inside it when the normal power supply cannot supply power normally due to power outage, undervoltage, overvoltage and other problems, and can also use the first circuit breaker 5 arranged on the upper part of the normal power supply and the backup power supply to achieve overload and short-circuit protection operations, and then perform diversified power supply operations through multiple second circuit breakers 7. The sub-power supply cabinet 2 further increases the load capacity of external electrical equipment of the switch through the third circuit breaker 8 and the fourth circuit breaker 9, thereby utilizing the limited space of the cabinet 4 to maximize the number of electrical equipment carried. At the same time, the soft starter 12 in the soft start cabinet 3 can be used to perform soft start operations on some electrical equipment with special starting requirements, and by combining the PLC controller 13 and the intermediate relay 14, the autonomous soft start of the electrical equipment and the switching operation of the normal power after starting can be realized.

[0020] In general, terms should be understood, at least in part, in light of their use in the context. For example, at least in part based on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the sense of a singular, or can be used to describe a combination of features, structures, or characteristics in the sense of a plural. Similarly, at least in part based on the context, terms such as "a" or "the" can also be understood to convey a singular usage or a plural usage.

[0021] It should be readily understood that the terms "on", "above", and "over" in this disclosure should be interpreted in the broadest manner such that "on" not only means "directly on something", but also includes the meaning of "on something" with intervening features or layers therebetween, and "above" or "over" not only includes the meaning of "above" or "over something", but can also include the meaning of "above" or "over something" with no intervening features or layers therebetween (i.e., directly on something).

[0022] In addition, spatial relative terms may be used herein for ease of description, such as "below", "beneath", "under", "above", "over", etc., to describe the relationship of one element or feature to another as shown in the figures. Spatial relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation shown in the figures. The device may have other orientations (rotated 90 degrees or at other orientations), and the spatial relative descriptors used herein can be interpreted accordingly.

[0023] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A dual power supply combined switch cabinet, characterized in that: It includes a power supply cabinet for distributing electric energy and providing protection, and a soft start cabinet for smoothly starting electrical equipment and reducing starting current impact. The power supply cabinet is divided into a main power supply cabinet capable of switching between normal power supply and backup power supply, and a sub-power supply cabinet capable of maximizing the expansion of power supply branches. The main power supply cabinet and the sub-power supply cabinet are arranged side by side, and the main power supply cabinet, the sub-power supply cabinet and the soft start cabinet share a cabinet body; the main power supply cabinet includes a first power switch and a second circuit breaker, and the cabinet body is provided with a first power switch for realizing the power on-off function, and the first power switch is a dual power switch connected to the normal power supply and the backup power supply through a terminal block; the main power supply cabinet also includes a first circuit breaker, and the upper parts of the terminal blocks of the normal power supply and the backup power supply are both connected in series with a first circuit breaker with overload and short-circuit protection functions; the main power supply cabinet also includes a second circuit breaker, and a plurality of second circuit breakers connected to the power switches are arranged side by side at the output end of the first power switch.

2. The dual power supply combined switch cabinet according to claim 1 is characterized in that: The sub-power cabinet includes a third circuit breaker and a fourth circuit breaker. The third circuit breaker is arranged inside the cabinet and connected to the output end of the first power switch through a terminal block. The output end of the third circuit breaker is vertically installed and mirror-symmetrically arranged with multiple fourth circuit breakers connected to it, evenly and spaced apart.

3. The dual power supply combined switch cabinet according to claim 1 is characterized in that: The soft start cabinet includes a second power switch, a fifth circuit breaker, and a soft starter. The second power switch is arranged inside the cabinet and arranged side by side with the first power switch. The output end of the second power switch is evenly and spaced with multiple fifth circuit breakers connected side by side with the output end. A soft starter for controlling the gradual start of electrical equipment is also arranged inside the cabinet. The soft starter is connected to the fifth circuit breaker through a terminal block.

4. The dual power supply combined switch cabinet according to claim 3 is characterized in that: The soft start cabinet also includes a PLC controller and an intermediate relay. The cabinet is internally provided with a PLC controller respectively connected to the soft starter for adjusting the start parameters and an intermediate relay for bypassing the soft starter.

5. The dual power supply combined switch cabinet according to claim 1 is characterized in that: The power cabinet and soft start cabinet are arranged side by side in a regular manner.

6. The dual power supply combined switch cabinet according to claim 1 is characterized in that: The front part of the cabinet body is arranged with a cabinet door with a horizontal outward-folding structure, and the bottom of the cabinet body is arranged with a base with an off-ground supporting function.

7. The dual power supply combined switch cabinet according to claim 1 is characterized in that: Meshes with height differences for ventilation and heat dissipation are arranged on both sides of the cabinet.

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