A 35kV control cabinet

Abstract

The utility model relates to the field of power industry transmission and distribution technology discloses a 35kV control box, installs on the automation terminal screen, including control box box body, is provided with control box door panel on the control box box body, is provided with control box mounting panel on control box door panel, the outside of control box mounting panel is provided with the functional element mark structure for function division and advance prefabricated wiring harness, the inside of control box mounting panel is provided with multiple sets of control cabinet three position remote control loop, control cabinet terminal strip and control box terminal strip, the functional element mark structure includes a plurality of interval units, and the terminal strip of each interval unit is connected with control box terminal strip through prefabricated wiring harness, the utility model divides the area according to different interval units, realizes and accesses corresponding terminal strip according to control function, to solve the existing design local control function off-site display and cross connection, secondary box wiring harness is many, influences worker wiring efficiency and accuracy etc.

Description

Technical Field

[0001] This utility model relates to the field of power transmission and distribution technology in the power industry, specifically a 35kV control box. Background Technology

[0002] Power transmission and distribution technology is a core component of the efficient operation of the power system, responsible for safely and stably delivering electricity generated by power plants to users. With energy transition, large-scale integration of renewable energy, and increasing electricity load demand, power transmission and distribution technology continues to innovate and develop.

[0003] A search revealed an application for an offline testing device for a 35kV high-voltage circuit breaker used in LF refining. The device includes a control box and a control module, an indicator module, and an output module installed within the control box. The control module has a closing button and a closing button, which are connected to the closing and opening coils of the 35kV high-voltage circuit breaker via the output module to control the opening and closing of the circuit breaker. The indicator module has a closing indicator light, a closing indicator light, and a three-phase closing indicator light to display the operating status of the 35kV high-voltage circuit breaker and to detect the contact closure status when the circuit breaker is closed. The output module has connecting lines and a plug socket to connect the testing device to the 35kV high-voltage circuit breaker. This device aims to improve the continuous production time of LF refining, effectively ensure the safety of electrical maintenance personnel, promptly detect potential faults in the 35kV high-voltage circuit breaker, and ensure the circuit breaker is fully functional before being put into operation.

[0004] Currently, 35kV intelligent ring main units mainly use circuit breaker cabinet control, and the distribution network requires automation (i.e., telemetry, remote signaling, and remote control) functions. However, in existing electrical designs, the local control functions are all set in the secondary box of the cabinet, while the three remote functions are set in the automation terminal panel and connected to the automation terminal panel through control cables. During equipment commissioning and transmission, it is necessary to cyclically check the local and three remote operation status, which is inconvenient for observation and wiring. Therefore, we need to propose a 35kV control box. Utility Model Content

[0005] The purpose of this utility model is to provide a 35kV control box that divides areas according to different bay units and realizes the connection of corresponding terminal blocks according to control functions, so as to solve the problems of local control function remote display and cross wiring, multiple secondary box wiring harnesses, and the impact on the wiring efficiency and accuracy of workers in the existing design, and to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a 35kV control box, installed on an automation terminal screen, including a control box body, a control box door panel on the control box body, a control box mounting plate on the control box door panel, and a functional element identification structure for functional division and pre-fabrication of wiring harnesses on the outer side of the control box mounting plate;

[0007] The inner side of the control box mounting plate is provided with multiple sets of control cabinet three-position remote control circuits, control cabinet wiring board, and control box terminal block. The functional element identification structure includes multiple interval units, and the terminal block of each interval unit is connected to the control box terminal block through a prefabricated wiring harness.

[0008] Preferably, the interval unit includes a signal indicator light for displaying the operating status of the switch, a control button for remotely controlling the closing / opening of the switch unit, and a terminal block installed inside the control box. The indicator light, control button, and terminal block are all connected to the terminal block of the control box via prefabricated wiring harnesses.

[0009] Preferably, the multiple sets of control cabinet three-position remote control circuits include H01 control cabinet three-position remote control circuit, H02 control cabinet three-position remote control circuit, H03 control cabinet three-position remote control circuit, H04 control cabinet three-position remote control circuit, and PT control cabinet three-position remote control circuit arranged in parallel.

[0010] The control cabinet wiring board includes H01 wiring cabinet, H02 wiring cabinet, H03 wiring cabinet, H04 wiring cabinet and PT wiring cabinet arranged in parallel.

[0011] Preferably, the control box terminal block includes two sets of 1SB illuminated buttons, two sets of 2SB illuminated buttons, two sets of 3SB illuminated buttons, two sets of 4SB illuminated buttons, and two sets of 5SB illuminated buttons. The 1SB illuminated buttons are connected to the three-position remote control circuit of the H01 control cabinet, the 2SB illuminated buttons are connected to the three-position remote control circuit of the H02 control cabinet, the 3SB illuminated buttons are connected to the three-position remote control circuit of the H03 control cabinet, the 4SB illuminated buttons are connected to the three-position remote control circuit of the H04 control cabinet, and the 5SB illuminated buttons are connected to the three-position remote control circuit of the PT control cabinet.

[0012] Preferably, each set of three-position remote control circuits of the control cabinet includes: a grounding closing button and a grounding opening indicator light, a grounding opening button and a grounding closing indicator light, an isolation closing button and an isolation opening indicator light, and an isolation opening button and an isolation closing indicator light.

[0013] Preferably, the side of the control box body is also provided with a control box side plate and a secondary mounting plate, and the control box side plate is provided with knockout holes around its perimeter.

[0014] Preferably, a secondary wire binding frame is also welded onto the control box door panel.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. This utility model divides areas according to different interval units, and realizes the connection of corresponding terminal blocks according to control functions, so as to solve the problems of local control function display in different locations and cross wiring, multiple secondary box wiring harnesses, and the impact on the wiring efficiency and accuracy of workers in the existing design.

[0017] 2. This utility model achieves better unification of remote control signals and operating status interface by installing the control box on the automation terminal screen, and the prefabrication of wiring harnesses can greatly improve work efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the control box door panel of this utility model;

[0019] Figure 2 This is a structural schematic diagram of the control box body, control box mounting plate, and control box terminal block of this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the control box side panel of this utility model;

[0021] Figure 4 This is a schematic diagram of the three-position remote control circuit of the control cabinet (H01) of this utility model;

[0022] Figure 5 This is a schematic diagram of the wiring board of the control cabinet (H01) of this utility model;

[0023] Figure 6 This is a partial structural diagram of the terminal block of the control box of this utility model;

[0024] Figure 7 This is a structural schematic diagram of the control box side panel and the automation terminal screen of this utility model;

[0025] Figure 8 This is a schematic diagram of the functional component identification structure and the automated terminal screen of this utility model.

[0026] In the diagram: 1. Control box door panel; 2. Control box body; 3. Control box mounting plate; 4. Functional component identification structure; 5. Control box side panel; 6. Control cabinet three-position remote control circuit; 7. Control cabinet wiring board; 8. Control box terminal block. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figure 1-8 This utility model provides a technical solution: a 35kV control box, installed on an automation terminal screen, which can better unify remote control signals and operating status interface.

[0029] It includes a control box body 2, a control box door panel 1 on the control box body 2, a control box mounting plate 3 on the control box door panel 1, and a functional element identification structure 4 for functional division and prefabrication of wiring harnesses on the outside of the control box mounting plate 3; the prefabrication of wiring harnesses can greatly improve work efficiency.

[0030] The inner side of the control box mounting plate 3 is equipped with multiple sets of three-position remote control circuits 6, control cabinet wiring board 7, and control box terminal block 8. The functional component identification structure 4 includes multiple horizontally spaced interval units. The terminal block of each interval unit is connected to the control box terminal block 8 through a pre-fabricated wiring harness. This achieves a unified human-machine interface and facilitates observation and wiring.

[0031] The bay unit includes signal indicator lights for displaying the operating status of the switch, control buttons for remote control of the switch unit's closing / opening, and terminal blocks installed in the control box 2. The indicator lights, control buttons, and terminal blocks are all connected to the control box terminal blocks 8 via prefabricated wiring harnesses.

[0032] The multi-group control cabinet three-position remote control circuit 6 includes the H01 control cabinet three-position remote control circuit, H02 control cabinet three-position remote control circuit, H03 control cabinet three-position remote control circuit, H04 control cabinet three-position remote control circuit, and PT control cabinet three-position remote control circuit, which are set in parallel.

[0033] The control cabinet wiring board 7 includes H01 wiring cabinet, H02 wiring cabinet, H03 wiring cabinet, H04 wiring cabinet and PT wiring cabinet arranged in parallel.

[0034] The control box terminal block 8 includes two sets of 1SB illuminated buttons, two sets of 2SB illuminated buttons, two sets of 3SB illuminated buttons, two sets of 4SB illuminated buttons, and two sets of 5SB illuminated buttons. The 1SB illuminated buttons are connected to the three-position remote control circuit of the H01 control cabinet, the 2SB illuminated buttons are connected to the three-position remote control circuit of the H02 control cabinet, the 3SB illuminated buttons are connected to the three-position remote control circuit of the H03 control cabinet, the 4SB illuminated buttons are connected to the three-position remote control circuit of the H04 control cabinet, and the 5SB illuminated buttons are connected to the three-position remote control circuit of the PT control cabinet.

[0035] Each set of control cabinet three-position remote control circuits 6 includes: grounding closing button and grounding opening indicator (green), grounding opening button and grounding closing indicator (red), isolation closing button and isolation opening indicator (green), and isolation opening button and isolation closing indicator (red).

[0036] Mechanical interlocking signals are transmitted via terminal block 8 in the control box, with each operation corresponding to dual signal outputs (local indication + remote control).

[0037] The grounding closing button and grounding indicator light, the grounding opening button and grounding closing indicator light together form the grounding switch control unit, and the isolating closing button and isolating opening indicator light, the isolating opening button and isolating closing indicator light together form the isolating switch control unit.

[0038] The control box body 2 is also provided with a control box side plate 5 and a secondary mounting plate. Knockout holes are provided around the control box side plate 5 to facilitate the passage of wire harnesses.

[0039] A secondary wiring bracket is also welded onto the control box door panel 1 to support on-site wiring organization.

[0040] When operating this device locally, triggering the illuminated button on the control box door panel 1 controls the three-position remote control circuit of control cabinet H01, control cabinet H02, control cabinet H03, control cabinet H04, and control cabinet PT. When the button is pressed, the interlock signal of terminal block 8 in the control box must be satisfied.

[0041] When operating this device remotely, the signal transmission path for triggering the display screen or operation panel of the automation terminal screen is: remote command — automation terminal screen — control box terminal block 8 — logic controller (not shown in the figure).

[0042] Signal processing: When an input signal is received, the button operation signal is transmitted from the control box door panel 1 to the control box terminal block 8 through the prefabricated wiring harness, and the remote control signal is transmitted to the control box terminal block 8 through the automated terminal screen;

[0043] When outputting signals, the vacuum circuit breaker (not shown in the figure) drive signal passes through the control box terminal block 8 and the control cabinet three-position remote control circuit 6, and the status indication signal passes through the control box terminal block 8 and the indicator light.

[0044] The grounding switch tripping signal takes precedence over the disconnecting switch operation (achieved through the auxiliary contact of terminal block 8 in the control box);

[0045] Logic control: The logic controller (located in the automation terminal screen) parses remote control commands and local operation commands, executes the five-prevention interlocking logic (opening-closing), and performs fault diagnosis. The circuit breaker contact (not shown in the figure) position sensor provides real-time feedback on the opening and closing status, and the grounding switch status sensor (integrated in the three-position remote control circuit 6 of the control cabinet, not shown in the figure) transmits the signal to the control box terminal block 8.

[0046] Execution feedback: The logic controller outputs a signal to the vacuum contactor coil, which then connects to the circuit breaker contacts for opening and closing; the indicator lights on the control box door panel 1 display the equipment status (opening / closing / fault) in real time.

[0047] The signal status is transmitted back to the dispatch center monitoring system after passing through terminal block 8 of the control box and the automation terminal screen.

[0048] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A 35kV control box, installed on an automation terminal screen, characterized in that: Includes a control box body (2), a control box door panel (1) is provided on the control box body (2), a control box mounting plate (3) is provided on the control box door panel (1), and a functional element identification structure (4) for functional division and prefabrication of wiring harnesses is provided on the outside of the control box mounting plate (3). The inner side of the control box mounting plate (3) is provided with multiple sets of control cabinet three-position remote control circuits (6), control cabinet wiring board (7), and control box terminal block (8). The functional element identification structure (4) includes multiple interval units, and the terminal block of each interval unit is connected to the control box terminal block (8) through a prefabricated wire harness.

2. A 35kV control box according to claim 1, characterized in that: The interval unit includes a signal indicator light for displaying the operating status of the switch, a control button for remote control of the switch unit closing / opening, and a terminal block installed in the control box housing (2). The indicator light, control button, and terminal block are all connected to the control box terminal block (8) through a prefabricated wiring harness.

3. A 35kV control box according to claim 1, characterized in that: The multiple sets of control cabinet three-position remote control circuits (6) include H01 control cabinet three-position remote control circuit, H02 control cabinet three-position remote control circuit, H03 control cabinet three-position remote control circuit, H04 control cabinet three-position remote control circuit, and PT control cabinet three-position remote control circuit, which are set in parallel. The control cabinet wiring board (7) includes H01 wiring cabinet, H02 wiring cabinet, H03 wiring cabinet, H04 wiring cabinet and PT wiring cabinet arranged in parallel.

4. A 35kV control box according to claim 3, characterized in that: The control box terminal block (8) includes two sets of 1SB illuminated buttons, two sets of 2SB illuminated buttons, two sets of 3SB illuminated buttons, two sets of 4SB illuminated buttons, and two sets of 5SB illuminated buttons. The 1SB illuminated buttons are connected to the three-position remote control circuit of the H01 control cabinet, the 2SB illuminated buttons are connected to the three-position remote control circuit of the H02 control cabinet, the 3SB illuminated buttons are connected to the three-position remote control circuit of the H03 control cabinet, the 4SB illuminated buttons are connected to the three-position remote control circuit of the H04 control cabinet, and the 5SB illuminated buttons are connected to the three-position remote control circuit of the PT control cabinet.

5. A 35kV control box according to claim 4, characterized in that: Each set of the control cabinet three-position remote control circuit (6) includes: grounding closing button and grounding opening indicator, grounding opening button and grounding closing indicator, isolation closing button and isolation opening indicator, and isolation opening button and isolation closing indicator.

6. A 35kV control box according to claim 1, characterized in that: The control box body (2) is also provided with a control box side plate (5) and a secondary mounting plate on its side, and knock-out holes are provided around the control box side plate (5).

7. A 35kV control box according to claim 1, characterized in that: A secondary wire binding frame is also welded onto the control box door panel (1).

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