One-key switching operation box for segmented wiring of single bus

Abstract

The utility model discloses a one-key switching operation box for segmented wiring of a single bus, belongs to the field of switching operation boxes, and aims to solve the problems of safety risk, bus power loss caused by easy misoperation and great influence of transformer circulation caused by long manual operation time due to the fact that the current local opening and closing operation needs to be manually operated by personnel at a short distance. The device comprises an operation box body, the bottom surface of the operation box body is provided with an external grounding terminal, the lower surface of the operation box body is provided with a cable inlet and outlet hole, and a box door of the operation box body is provided with an indicating lamp, a selection switch, an operation button and a function locking pressing plate. According to the utility model, switching operations of various power supply modes can be realized by only one operation button. The working position locking pressing plates of the first-section incoming line switch, the second-section incoming line switch and the bus tie switch are arranged, so that when the first-section incoming line switch, the second-section incoming line switch and the bus tie switch are at the test positions, the one-key switching operation function test of the operation box can be carried out.

Description

Technical Field

[0001] This utility model relates to the technical field of switching operation boxes, specifically to a one-button switching operation box for single busbar segmented wiring. Background Technology

[0002] Due to the need for maintenance of switchgear and transformers, and changes in power supply and distribution wiring, substation switchgear requires switching operations. During local switching operations, due to the numerous steps involved, inadequate checks and confirmations, and operator inattention, errors can occur, leading to busbar de-energization and safety accidents. Furthermore, during the opening and closing of switches, abnormal situations may arise, causing incoming line switches and bus tie switches to explode and injure personnel due to connecting or disconnecting short-circuit currents. To address these issues and ensure personal safety, measures such as changing the local operating location and maintaining a safe distance between operators and switchgear are implemented.

[0003] Currently, local operation of switchgear requires operators to stand in front of the switchgear panel, which cannot guarantee the personal safety of operators in abnormal situations. During local switching operations, the cumbersome procedures and lack of operator concentration can easily lead to misoperation accidents, causing power loss on the switchgear busbar and resulting in a safety accident. Furthermore, the long manual operation time during busbar switching operations results in prolonged transformer parallel operation time and significant circulating current impact. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model proposes a one-button switching operation box for single busbar segmented wiring, including an operation box body. The bottom surface of the operation box body is designed with an external grounding terminal, and the bottom of the operation box body is designed with cable inlet and outlet holes. The operation box body door is equipped with indicator lights, selector switches, operation buttons, and function interlocking pressure plates.

[0005] As a further improvement of this utility model, fixing ears are installed at the four top corners of the back panel of the operating box.

[0006] As a further improvement of this utility model, the door of the operating box is a single-opening type, and a safety lock is installed on it.

[0007] As a further improvement of this utility model, the indicator lights are specifically: a 1st section incoming line switch closing indicator, a 1st section incoming line switch opening indicator, a 2nd section incoming line switch closing indicator, a 2nd section incoming line switch opening indicator, a bus tie switch closing indicator, and a bus tie switch opening indicator.

[0008] As a further improvement of this utility model, the selection switch specifically includes: an automatic switching operation selection switch, a switching operation tripping switch, a 1-section incoming line switch that allows closing, a 2-section incoming line switch that allows closing, and a bus tie switch that allows closing.

[0009] As a further improvement of this utility model, the operation buttons are specifically: a closing button for the first-section incoming line switch, a closing button for the second-section incoming line switch, and a closing button for the bus tie switch.

[0010] As a further improvement of this utility model, the functional locking plate specifically includes: a locking plate for the working position of the first-stage incoming line switch, a locking plate for the working position of the second-stage incoming line switch, and a locking plate for the working position of the bus tie switch.

[0011] As a further improvement of this utility model, the operating box is also equipped with a control circuit power switch, a signal extension relay and a terminal block.

[0012] The beneficial effects of this utility model are:

[0013] 1. Switching operations for various power supply modes can be achieved with just one operating button. The locking pressure plates for the working positions of the 1st-section incoming switch, 2nd-section incoming switch, and bus tie switch can meet the one-button switching operation function test of the operating box when the 1st-section incoming switch, 2nd-section incoming switch, and bus tie switch are in the test position.

[0014] 2. It can quickly open and close the incoming line switch and the bus tie switch, with fast switching speed, reducing the parallel operation time of the transformer and reducing the impact of circulating current; it is equipped with opening and closing status indicator lights to show the operating status of each switch.

[0015] 3. By collecting the status signals of the first-section incoming switch, the second-section incoming switch, and the bus tie switch, the selected trip switch can be automatically tripped.

[0016] 4. The closing circuit uses a single-stage incoming line switch / a double-stage incoming line switch / bus tie switch to allow closing, and has a function to prevent accidental closing when turned to the "prohibited" position; the opening circuit is designed with an automatic switching operation selection switch, which has a function to prevent accidental opening when turned to the "prohibited" position. The opening circuit is also designed with a switching operation selector switch, which can realize switching operations for various wiring methods.

[0017] 5. Design a 1-stage incoming line switch status signal extension relay / 2-stage incoming line switch status signal extension relay / bus tie switch status signal extension relay to realize the status signal extension function of incoming line switches and bus tie switches, thereby reducing the number of auxiliary contacts of the application switches and the number of control cable cores.

[0018] 6. A power switch for the control circuit is installed to protect the control circuit; the DC220 power supply from the substation is used as the power supply for the control circuit, ensuring stable and reliable power supply.

[0019] 7. The cabinet is made of cold-rolled steel plate with powder coating, and the cabinet color is RAL7035, which enhances its appearance and durability.

[0020] 8. Internal terminal blocks facilitate the connection of various communication signals; internal and external grounding terminals are provided for protective grounding. This allows for installation at locations far from the on-site switchgear, better ensuring operator safety. Attached Figure Description

[0021] Figure 1 This is an overall structural diagram of the present invention;

[0022] Figure 2 This is the electrical schematic diagram of this utility model;

[0023] Figure 3 This is a single busbar segmented wiring diagram of this utility model;

[0024] Attached reference numerals: 1. Automatic switching operation selector switch; 2. Switching operation trip switch; 3. Section 1 incoming line switch closing indicator; 4. Section 1 incoming line switch opening indicator; 5. Section 1 incoming line switch closing permission indicator; 6. Section 1 incoming line switch closing button; 7. Section 1 incoming line switch working position interlocking plate; 8. Section 2 incoming line switch closing indicator; 9. Section 2 incoming line switch opening indicator; 10. Section 2 incoming line switch closing permission indicator; 11. Section 2 incoming line switch closing button; 12. Section 2 incoming line switch working position interlocking plate; 13. Bus tie switch closing indicator; 14. Bus tie switch opening indicator; 15. Bus tie switch closing permission indicator; 16. Bus tie switch closing button; 17. Bus tie switch working position interlocking plate; 18. Fixing lug; 19. Cable inlet / outlet hole; 20. Operating box. Detailed Implementation

[0025] To facilitate understanding of this application, a more comprehensive description will be provided below with reference to the accompanying drawings. The drawings illustrate the described embodiments. Rather, these embodiments are provided to enable a more thorough and complete understanding of the disclosure of this application.

[0026] like Figure 1As shown, a one-button switching control box for single busbar segmented wiring includes a control box body 20. The control box body 20 has a single-opening door. The control box body 20 is 320mm long, 320mm wide, and 200mm deep. The box body is made of cold-rolled steel plate with a powder-coated finish, and the cabinet color is RAL7035. The bottom surface of the control box body 20 is designed with an external grounding terminal for protective grounding. The bottom of the control box body 20 has cable inlet / outlet holes 19 for controlling the entry and exit of connecting cables. The control box body 20 door is equipped with indicator lights, selector switches, buttons, and a function interlocking pressure plate. The control box body 20 also contains a control circuit power switch, a signal extension relay, and a terminal block. The four corners of the back panel of the control box body 20 are designed with fixing ears 18 for mounting and securing the control box. A safety lock is also installed on the control box body 20 door.

[0027] The indicator lights are specifically: Section 1 incoming line switch closing indicator 3, Section 1 incoming line switch opening indicator 4, Section 2 incoming line switch closing indicator 8, Section 2 incoming line switch opening indicator 9, bus tie switch closing indicator 13, and bus tie switch opening indicator 14.

[0028] The selector switches are specifically: automatic switching operation selector switch 1, switching operation trip selector switch 2, 1st section incoming line switch closing permission 5, 2nd section incoming line switch closing permission 10, and bus tie switch closing permission 15.

[0029] The buttons are specifically: the closing button 6 for the first-section incoming line switch, the closing button 11 for the second-section incoming line switch, and the closing button 16 for the bus tie switch.

[0030] The functional interlocking plates are specifically: the working position interlocking plate 7 of the first-stage incoming line switch, the working position interlocking plate 12 of the second-stage incoming line switch, and the working position interlocking plate 17 of the bus tie switch.

[0031] A one-button switching operation box for single busbar segmented wiring is constructed by combining a control power switch, buttons, selector switches, indicator lights, and a function interlocking pressure plate. This operation box collects status signals from the first and second incoming line switches and the bus tie switch. Combined with switch opening / closing indicator circuits, selector switch auxiliary contacts, and operation buttons, it enables the opening and closing of the incoming line switches and bus tie switches. Only one operation button is needed to perform switching operations for various power supply modes, simplifying the operation process and preventing misoperations caused by multiple steps. This operation box maintains a safe distance from the switchgear, effectively ensuring the personal safety of operators. The operation box allows for rapid opening and closing of the incoming line switches and bus tie switches, with fast switching speed, reducing transformer parallel operation time and minimizing the impact of circulating current.

[0032] In this embodiment, the technical specifications of the one-button switching operation box for single busbar segmented wiring are as follows: operating temperature: -10℃~+50℃; relative humidity: 5%~95%; power supply: DC220V; in addition, the correspondence between the English numbers involved in the circuit diagram and the corresponding component names is as follows:

[0033] English number Component Name Function Description HR1 Section 1 incoming line switch closing indication Displays the closing status of the incoming line switch (section 1). HG1 Section 1 incoming line switch trip indication Displays the open status of the incoming line switch (section 1). SA1 Section 1 incoming line switch is allowed to be closed. Control the closing operation authority of the incoming line switch of section 1 SB1 Section 1 incoming line switch closing button Manually operate the closing action of the first incoming line switch 1LP Section 1 incoming line switch working position locking pressure plate When the first incoming line switch is in the test position, perform a functional test of the control box. HR2 2-section incoming line switch closing indication Displays the closing status of the two incoming line switches. HG2 2-section incoming line switch trip indication Displays the open status of the two incoming line switches. SA2 Two-section incoming line switch is allowed to be closed. Control the closing operation authority of the two incoming line switches SB2 2-section incoming line switch closing button Manually operate the closing action of the 2-stage incoming line switch 2LP 2-section incoming line switch working position locking pressure plate Engage the two incoming line switches in the test position to perform a functional test of the control box. HR3 Bus tie switch closing indication Displays the closing status of the bus tie switch. HG3 Bus tie switch trip indication Displays the tripping status of the bus tie switch. SA3 Bus tie switch allows closing Controlling the closing operation authority of the bus tie switch SB3 Bus tie switch closing button Manual operation of closing the bus tie switch 3LP Bus tie switch working position locking pressure plate Engage the bus tie switch in the test position to perform a functional test of the control box. SA4 Automatic switching operation selector switch Select automatic switching operation mode SA5 Switching operation selector switch Trip operation selected for switching operations QA1 Control box control circuit power switch Power supply for the control box KA1 1-section incoming line switch status signal extension relay Extend the status signal of the first-stage incoming line switch KA2 2-section incoming line switch status signal extension relay Extend the status signal of the 2-stage incoming line switch KA3 Bus tie switch status signal extension relay Extended bus tie switch status signal KD Internal wiring terminal block of the control box Terminal block arrangement inside the control box

[0034] like Figures 2-3 As shown, the specific functions of the one-button switching operation box for single busbar segmented wiring proposed in this utility model are as follows:

[0035] The operating instructions for the segmented operation of busbars section 1 and section 2 are as follows:

[0036] After verifying that transformers #1 and #2 are energized, and that the first-section incoming switch QF1, the second-section incoming switch QF2, and the bus tie switch QF3 are in the working position, close the power switch of the control circuit QA1 in the control box. Check that the green lights of the first-section incoming switch open indicator 4, the second-section incoming switch open indicator 9, and the bus tie switch open indicator 14 are all on. Turn the first-section incoming switch open indicator 5 to the "Allow" position and press the first-section incoming switch close button 6. Check that the first-section incoming switch close indicator 3 is on. Turn the second-section incoming switch open indicator 10 to the "Allow" position and press the second-section incoming switch close button 11. Check that the second-section incoming switch close indicator 8 is on. Through the above operation steps, the control box can realize the segmented operation of the first and second sections of the bus.

[0037] The following are the operating instructions for changing the busbar section from being driven by the incoming line switch to being driven by the bus tie switch:

[0038] Check that the red light of the closing indicator 3 of the incoming line switch 1 in the control box is lit, and the red light of the closing indicator 8 of the incoming line switch 2 in the control box is lit. Turn the automatic switching operation selector switch 1 in the control box to the "Allow" position, turn the switching operation trip switch 2 to the "Trip 1 Section" position, turn the bus tie switch closing allow 15 to the "Allow" position, press the bus tie switch closing button 16, check that the red light of the bus tie switch closing indicator 13 in the control box is lit, and the green light of the opening indicator 4 of the incoming line switch 1 in the control box is lit. Turn the automatic switching operation selector switch 1 in the control box to the "Disable" position. The one-button switching operation of the bus section 1, which was previously driven by the incoming line switch 1, is now driven by the bus tie switch.

[0039] The operating instructions for changing the busbar section from being driven by the bus tie switch to being driven by the incoming line switch of section 1 are as follows:

[0040] Check that the red light of the bus tie switch closing indicator 13 is lit, the green light of the first-section incoming line switch opening indicator 4 is lit, and the red light of the second-section incoming line switch closing indicator 8 is lit. Turn the automatic switching operation selector switch 1 of the control box to the "Allow" position, turn the switching operation trip switch 2 to the "Trip Bus Tie" position, turn the first-section incoming line switch closing allow 5 to the "Allow" position, press the first-section incoming line switch closing button 6, check that the red light of the first-section incoming line switch closing indicator 3 is lit, and the green light of the bus tie switch opening indicator 14 is lit. Turn the automatic switching operation selector switch 1 of the control box to the "Disable" position. The one-button switching operation of the first-section busbar, which was previously driven by the bus tie switch, is now driven by the first-section incoming line switch.

[0041] The following are the operating instructions for changing the busbar section from being driven by two incoming line switches to being driven by the bus tie switch:

[0042] Check that the red light of the closing indicator 3 of the first-section incoming line switch and the red light of the closing indicator 8 of the second-section incoming line switch are lit. Turn the automatic switching operation selector switch 1 of the control box to the "Allow" position, turn the switching operation trip switch 2 to the "Trip 2 Sections" position, turn the bus tie switch closing permission 15 to the "Allow" position, press the bus tie switch closing button 16, check that the red light of the bus tie switch closing indicator 13 is lit and the green light of the second-section incoming line switch opening indicator 9 is lit. Turn the automatic switching operation selector switch 1 of the control box to the "Disable" position. The one-button switching operation of the second-section busbar, which was previously driven by the second-section incoming line switch, is now driven by the bus tie switch.

[0043] The operating instructions for changing the busbar section from being driven by the bus tie switch to being driven by the two incoming line switches are as follows:

[0044] Check that the red light of the bus tie switch closing indicator 13 is lit, the green light of the second-section incoming line switch opening indicator 9 is lit, and the red light of the first-section incoming line switch closing indicator 3 is lit. Turn the automatic switching operation selector switch 1 of the control box to the "Allow" position, turn the switching operation trip switch 2 to the "Trip Bus Tie" position, turn the second-section incoming line switch closing allow 10 to the "Allow" position, press the second-section incoming line switch closing button 11, check that the red light of the second-section incoming line switch closing indicator 8 is lit, and the green light of the bus tie switch opening indicator 14 is lit. Turn the automatic switching operation selector switch 1 of the control box to the "Disable" position. The one-button switching operation of the second-section busbar, which was previously driven by the bus tie switch, is now driven by the second-section incoming line switch.

[0045] The operating instructions for changing the service from a single incoming line switch supplying busbars sections 1 and 2 to a system where a single incoming line switch supplies busbars sections 1 and 2 are used are as follows:

[0046] Check that the red light is on for the closing indicator 3 of the incoming line switch section 1 in the control box, the green light is on for the opening indicator 9 of the incoming line switch section 2, and the red light is on for the closing indicator 13 of the bus tie switch. Turn the automatic switching operation selector switch 1 in the control box to the "Allow" position, turn the switching operation trip switch 2 to the "Trip 1 Section" position, turn the closing allow switch 10 of the incoming line switch section 2 to the "Allow" position, press the closing button 11 of the incoming line switch section 2, check that the red light is on for the closing indicator 8 of the incoming line switch section 2 and the green light is on for the opening indicator 4 of the incoming line switch section 1, turn the automatic switching operation selector switch 1 in the control box to the "Disable" position, and the one-button switching operation of changing the bus from section 1 incoming line switch to section 1 and section 2 bus to section 2 incoming line switch is completed.

[0047] The operating instructions for changing the 2-section incoming line switch from supplying 1 and 2 sections of busbars to supplying 1 and 2 sections of busbars via a 1-section incoming line switch are as follows:

[0048] Check that the green light is on for the 1st section incoming line switch open indicator 4, the red light is on for the 2nd section incoming line switch closed indicator 8, and the red light is on for the bus tie switch closed indicator 13. Turn the automatic switching operation selector switch 1 in the control box to the "Allow" position, turn the switching operation trip switch 2 to the "Trip 2 Sections" position, turn the 1st section incoming line switch closed indicator 5 to the "Allow" position, press the 1st section incoming line switch closed button 6, check that the red light is on for the 1st section incoming line switch closed indicator 3 and the green light is on for the 2nd section incoming line switch open indicator 9. Turn the automatic switching operation selector switch 1 in the control box to the "Disable" position. The one-button switching operation of changing the 2nd section incoming line switch from driving the 1st and 2nd section busbars to driving the 1st and 2nd section busbars is now complete.

[0049] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A one-button switching operation box for single busbar segmented wiring, characterized in that, The system includes an operating box (20), the bottom of which is designed with an external grounding terminal, and the bottom of which is designed with a cable inlet / outlet hole (19). The door of the operating box (20) is equipped with an indicator light, a selector switch, an operating button, and a function locking plate.

2. The one-button switching operation box for single busbar segmented wiring according to claim 1, characterized in that, The operating box (20) has fixing ears (18) installed at the four top corners of the back panel.

3. The one-button switching operation box for single busbar segmented wiring according to claim 1, characterized in that, The door of the operating box (20) is a single-opening type, and a safety lock is installed on it.

4. The one-button switching operation box for single busbar segmented wiring according to claim 1, characterized in that, The indicator lights are specifically: Section 1 incoming line switch closing indicator (3), Section 1 incoming line switch opening indicator (4), Section 2 incoming line switch closing indicator (8), Section 2 incoming line switch opening indicator (9), bus tie switch closing indicator (13), and bus tie switch opening indicator (14).

5. The one-button switching operation box for single busbar segmented wiring according to claim 1, characterized in that, The selector switches are specifically: automatic switching operation selector switch (1), switching operation trip selector switch (2), 1st section incoming line switch allow closing (5), 2nd section incoming line switch allow closing (10), and bus tie switch allow closing (15).

6. The one-button switching operation box for single busbar segmented wiring according to claim 1, characterized in that, The operation buttons are specifically: the closing button for the first incoming line switch (6), the closing button for the second incoming line switch (11), and the closing button for the bus tie switch (16).

7. The one-button switching operation box for single busbar segmented wiring according to claim 1, characterized in that, The functional interlocking plates are specifically: the working position interlocking plate (7) of the first-stage incoming line switch, the working position interlocking plate (12) of the second-stage incoming line switch, and the working position interlocking plate (17) of the bus tie switch.

8. The one-button switching operation box for single busbar segmented wiring according to claim 1, characterized in that, The control box (20) is also equipped with a control circuit power switch, a signal extension relay and a terminal block.

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