A combined telephone set and extension telephone set AC cabinet

Abstract

The utility model relates to power control equipment technical field, specifically disclose a kind of and, branch exchange cabinet. The exchange cabinet includes cabinet, and multiple groups of ac input terminal and output terminal are equipped in cabinet, are connected by multiple groups of ac contactor, for realizing the automatic and of multiple power supply channel and load or branch control. Each group of contactor is equipped with L1, L2, L3 and N four groups of contact, suitable for three-phase four-wire system;The ac contactor is controlled by PLC controller, and PLC receives the and of host computer or branch instruction by communication interface, and drive contactor attraction or open, realize the unified scheduling or independent operation of multiple power supply;Indicator light module is equipped on cabinet, for showing the operating state of current channel. The device realizes the centralized and of multiple ac power supply control, with remote communication capability and state visualization function, suitable for laboratory power management and industrial power supply switching scene.

Description

Technical Field

[0001] This utility model relates to an AC cabinet, specifically a parallel and split-type AC cabinet. Background Technology

[0002] With the widespread application of energy management systems, building intelligent systems, and various industrial automation systems, junction boxes, used for centralized control, connection, and protection of electrical equipment, play a crucial role in electrical systems. Traditional junction box structures are often limited to basic functions such as cable entry and exit connections and conventional circuit breaker protection, but they are insufficient in addressing the integration of multi-functional modules, the integration of equipment communication interfaces, and the convenience of system security and maintenance.

[0003] Especially in modern intelligent electrical systems with energy management, automated control and external system networking functions, junction boxes not only undertake basic tasks such as power distribution and circuit control, but also need to integrate various functional components such as circuit breaker modules, power supply modules, communication modules and isolation modules. They also need to make reasonable plans for their installation location, cable routing, wiring methods and component spacing to ensure the stability and reliability of system operation.

[0004] Existing junction boxes commonly suffer from the following problems: First, the internal component layout is not compact and reasonable, resulting in low space utilization; second, the wiring arrangement is chaotic, increasing the difficulty of later maintenance and the risk of misoperation; third, there is a lack of unified installation and wiring specifications for intelligent control units such as communication modules and management interfaces, making it difficult to meet the needs of complex intelligent system integration. Therefore, there is an urgent need to provide a new junction box structure with clear structure, orderly wiring, and high functional integration to improve the overall reliability of the system and the efficiency of construction and maintenance. Utility Model Content

[0005] To address the aforementioned problems, this utility model provides a parallel and split-type AC cabinet, which can effectively overcome the shortcomings of the prior art.

[0006] This utility model is achieved through the following technical solution: a parallel and split-type AC cabinet, comprising: Cabinet, the interior of which is provided with: Multiple sets of AC input terminals are used to connect to the output terminals of multiple AC power supplies; Multiple sets of AC output terminals are used to connect to the corresponding load under test or device; Multiple sets of AC contactors, each set of AC contactors including four sets of contacts L1, L2, L3, and N, which are respectively connected between the corresponding input terminal and output terminal; A PLC controller is electrically connected to the AC contactor and is used to control the contactor's engagement and disengagement. The indicator light module, connected to the PLC controller, is used to display the current parallel or sub-unit status; a red light indicates parallel operation, and a green light indicates no parallel operation. A communication interface is provided for connecting the PLC controller to an AC power control system or a host computer to enable remote communication and control. The PLC controller is used to receive parallel or split operation commands sent by the host computer, and drive the corresponding AC contactor to engage or disengage according to the received status signal to realize automatic parallel or split operation of AC power supply.

[0007] As a preferred technical solution, the multiple sets of AC input terminals include 6 sets, and the multiple sets of AC output terminals include 6 sets, respectively corresponding to the connection of 6 AC power supplies and 6 loads under test.

[0008] As a preferred technical solution, the PLC controller is used to receive the parallel status information fed back by the AC power supply after completing the master / slave setting, and control the AC contactor to engage after confirming that the parallel status is valid, so as to realize the physical parallel operation at the output end.

[0009] As a preferred technical solution, the AC contactor is a three-phase four-wire structure, where L1, L2, and L3 are three-phase live wire channels, and N is a neutral wire channel, suitable for parallel control of a 3P4W AC system.

[0010] As a preferred technical solution, after receiving the instruction from the sub-unit, the PLC controller controls the AC contactor to disconnect, so as to restore the independent output state of each AC power supply.

[0011] As a preferred technical solution, the communication interface is an RJ45 Ethernet interface, which is used to connect to the host computer system in the local area network to realize the issuance of remote operation commands and the uploading of status data.

[0012] As a preferred technical solution, the indicator light module is set up one-to-one with each group of AC contactors to display the parallel / disconnect status of the corresponding channel in real time.

[0013] As a preferred technical solution, the front end of the cabinet is provided with an observation window or status display area for observing the status changes of the indicator lights.

[0014] The beneficial effects of this utility model are as follows: This utility model provides a junction box for use with a regional energy intelligent management system. It belongs to the field of power system and intelligent energy dispatching technology. It addresses the problems of messy wiring, low integration of information collection and control functions, and inability to efficiently connect to the regional energy management system in existing junction boxes. By optimizing the design of the cabinet structure, internal electrical component layout and information collection terminal, it achieves the technical effect of compact structure, high functional integration and seamless connection with the upper-level regional energy management system.

[0015] This utility model incorporates a data acquisition module, protection device, and communication module inside the junction box, which are connected to the upper-level PLC control system. In conjunction with a temperature and humidity detection module and an access control system, it enables real-time monitoring of the operating environment and control of personnel access, thereby improving the operational safety and management accuracy of the junction box. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a system block diagram of the present invention. Detailed Implementation

[0018] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.

[0019] Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features for a similar purpose, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0020] like Figure 1 As shown, this utility model discloses a parallel and split AC cabinet with a reasonable structure and complete functions. It is suitable for centralized control and automatic switching management between multiple AC power supplies and loads, and is particularly suitable for laboratories, power testing systems or industrial power supply scenarios with master-slave power supply control requirements.

[0021] In this embodiment, the AC cabinet adopts a floor-standing, enclosed metal structure with a clearly defined internal layout, facilitating wiring, maintenance, and functional module expansion. The cabinet contains six sets of AC input terminals and six sets of AC output terminals. The input terminals are used to connect to the output lines from six AC power supplies. Each set includes three-phase live wire terminals L1, L2, and L3, and a neutral wire terminal N, forming a 3P4W wiring configuration. The corresponding output terminals are connected to external devices under test, loads, or test interfaces, ensuring that each power supply can independently or jointly drive the target load.

[0022] Between each pair of input and output terminals, there is a set of AC contactors. Each set of AC contactors has four sets of normally open contacts, corresponding to the three-phase live wire and neutral wire conduction paths, used to close or open the power circuit. The contactors are selected to meet the rated operating current and voltage requirements, and have good electrical and mechanical life, ensuring stable and reliable conduction performance during frequent switching.

[0023] The control section uses a PLC controller installed inside the cabinet to centrally process control logic. The PLC is electrically connected to each group of AC contactors through its output control terminal, receives control commands from the host computer or energy management system, and executes parallel or distributed operation actions according to the preset logic program. When the PLC receives a "parallel operation" command, it first communicates with the AC power supply to confirm, including master-slave configuration completion, synchronization status confirmation, and other condition checks. After confirming that the parallel operation conditions are met, the PLC outputs a control signal to drive the corresponding contactor to engage, realizing the parallel operation of the target power supply group. If a "distributed operation" command is received, the PLC immediately disconnects the contactor corresponding to the relevant channel, causing the power supply to exit parallel mode and return to independent power supply status.

[0024] To improve visibility and operational status identification efficiency, each contactor inside the AC cabinet is equipped with a corresponding indicator light module. These indicator lights are red and green; a solid red light indicates the channel is in parallel operation, while a solid green light indicates the channel is in extension or not connected. This allows users or testers to quickly confirm the current circuit status on-site. Additionally, an observation window or status display area is located at the front of the cabinet, allowing testers to observe the operational status of each channel without opening the cabinet door, thus improving operational safety.

[0025] The system also reserves a communication interface, preferably a standard RJ45 Ethernet interface, for connecting the PLC controller to the laboratory LAN or enterprise control platform. Through this interface, the PLC can receive parallel operation, branch operation, or status query commands from the host system, and transmit data such as the current circuit contactor status, input / output terminal status, and fault information back to the host computer, enabling remote operation and data synchronization. The PLC control program can also include parameter verification and delay logic to prevent frequent contactor disconnection due to communication jitter or misoperation, further improving system stability and electrical safety.

[0026] The entire AC cabinet features a compact structure, clear and standardized wiring, and excellent scalability and system compatibility. It can adapt to various testing and control needs, and is particularly suitable for scenarios such as grid-connected power switching, automatic switching of backup power systems, and variable frequency power management. While ensuring reliable equipment operation, it achieves intelligent control, visualized operation, and remote management, providing a highly efficient, safe, and intelligent parallel control solution for modern electrical systems.

[0027] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions conceived without inventive effort should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope defined in the claims.

Claims

1. A parallel / split-type AC cabinet, characterized in that, include: Cabinet, the interior of which is provided with: Multiple sets of AC input terminals are used to connect to the output terminals of multiple AC power supplies; Multiple sets of AC output terminals are used to connect to the corresponding load under test or device; Multiple sets of AC contactors, each set of AC contactors including four sets of contacts L1, L2, L3, and N, which are respectively connected between the corresponding input terminal and output terminal; A PLC controller is electrically connected to the AC contactor and is used to control the contactor's engagement and disengagement. The indicator light module, connected to the PLC controller, is used to display the current parallel or sub-unit status; a red light indicates parallel operation, and a green light indicates no parallel operation. A communication interface is provided for connecting the PLC controller to an AC power control system or a host computer to enable remote communication and control. The PLC controller is used to receive parallel or split-system commands sent by the host computer, and drive the corresponding AC contactor to engage or disengage according to the received status signal, so as to realize the automatic parallel or split-system operation of AC power supply.

2. The parallel / split AC cabinet according to claim 1, characterized in that: The multiple sets of AC input terminals include 6 sets, and the multiple sets of AC output terminals include 6 sets, which correspond to the connection of 6 AC power supplies and 6 loads under test, respectively.

3. The parallel / split AC cabinet according to claim 1, characterized in that: The PLC controller is used to receive the parallel status information fed back by the AC power supply after completing the master / slave setting, and to control the AC contactor to engage after confirming that the parallel status is valid, so as to realize the physical parallel operation at the output end.

4. The parallel / split AC cabinet according to claim 1, characterized in that: The AC contactor is a three-phase four-wire structure, with L1, L2, and L3 being the three-phase live wire channels and N being the neutral wire channel, suitable for parallel control of a 3P4W AC system.

5. The parallel / split AC cabinet according to claim 1, characterized in that: After receiving the instruction from the sub-unit, the PLC controller controls the AC contactor to disconnect, thereby restoring the independent output state of each AC power supply.

6. The parallel / split AC cabinet according to claim 1, characterized in that: The communication interface is an RJ45 Ethernet interface, used to connect to the host computer system in the local area network to realize the issuance of remote operation commands and the uploading of status data.

7. The parallel / split AC cabinet according to claim 1, characterized in that: The indicator light module is set up one-to-one with each group of AC contactors to display the parallel / disconnect status of the corresponding channel in real time.

8. The parallel / split AC cabinet according to claim 1, characterized in that: The front of the cabinet is provided with an observation window or status display area for observing the status changes of the indicator lights.

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