A system, method and use for detecting circuit resistance based on a grounded pole cutout

Abstract

The application discloses a system, method and use for detecting loop resistance based on grounding knife switch, relates to the technical field of air switch parts, and comprises a loop resistance tester and a grounding knife switch. The knife body of the grounding knife switch comprises a knife body, a first conductor, a second conductor and a connecting piece. The first conductor and the connecting piece form a first branch circuit, and the second conductor and the connecting piece form a second branch circuit. The method comprises the following steps: connecting a first pair of measuring terminals of the loop resistance tester with the connecting piece of the grounding knife switch through the first branch circuit, connecting a second pair of measuring terminals with the connecting piece of the grounding knife switch through the second branch circuit, and measuring and obtaining the loop resistance of the grounding knife switch. The use comprises the following steps: using the first detection system to measure and obtain the loop resistance of the grounding knife switch. The loop resistance of the grounding knife switch is measured through the two branch circuits of the loop resistance tester and the grounding knife switch.

Description

Technical Field

[0001] This invention relates to the field of air switch components technology, and in particular to a system, method and application for detecting the resistance of a grounding switch circuit. Background Technology

[0002] The author conducted a search using the search terms TTL_ALL:(grounding knife) AND TACD_ALL:((two OR double) AND grounding AND (rod OR component OR handle OR piece) AND contact), and obtained the following relatively similar existing technical solutions.

[0003] The authorization announcement number is CN210245374U, and the name is "Bipolar Electric Grounding Switch". It includes: a switch plate; a first stationary contact; a second stationary contact; a third stationary contact, the first, second, and third stationary contacts being mounted on the switch plate; a first moving contact, one end of which is rotatably connected to the third stationary contact, and the other end of which is openably connected to the first stationary contact; a second moving contact, one end of which is rotatably connected to the third stationary contact, and the other end of which is openably connected to the second stationary contact; a drive assembly; and a transmission assembly, the transmission assembly including a long shaft and multiple crank-connecting rod mechanisms. The long shaft is drivenly connected to the drive assembly and each crank-connecting rod mechanism, and each crank-connecting rod mechanism is drivenly connected to the first and second moving contacts respectively, so as to drive the first and second moving contacts to move synchronously. This solves the problem that existing grounding switches cannot meet the requirements for bipolar grounding applications.

[0004] The authorization announcement number is CN213936028U, and the name is Grounding Switch and Grounding Switch System. The grounding switch includes a mounting plate, and further includes: a moving contact plate, movably mounted on the mounting plate, with a first moving contact and a second moving contact at each end; two stationary contacts, fixedly mounted on the front of the mounting plate, wherein the grounding switch is in the closed state when the first and second moving contacts are engaged with the two stationary contacts; a transmission assembly, located on the back of the mounting plate, with at least a portion passing through the mounting plate and rotatably connected to the moving contact plate to switch the grounding switch between open and closed states; and a locking device for locking the moving contact plate, thus locking the grounding switch in both open and closed states. This solves the problems of existing manual grounding switches lacking anti-misoperation functions, being unable to monitor open / close states, and being easily damaged by force.

[0005] Based on the two patent documents mentioned above and existing technical solutions, the inventors analyze the existing technical solutions as follows.

[0006] According to regulations, the conductive circuit resistance of GIS busbars needs to be tested. Oxidation of contact surfaces, poor contact, and other factors can increase the circuit resistance, leading to higher equipment temperatures. High temperatures further accelerate contact surface oxidation, causing continuous overheating. Therefore, the circuit resistance needs to be measured regularly. Accurate measurement of the circuit resistance can effectively determine whether there are defects such as contact surface oxidation or poor contact in the conductive circuit of the GIS equipment, preventing overheating caused by excessive circuit resistance and ensuring safe and stable operation of the equipment.

[0007] like Figures 6-1 to 6-4 The diagram shows the wiring diagram for the resistance test circuit. I1 and I2 are the current output terminals of the tester; U1 and U2 are the voltage measurement terminals of the tester. The test principle is the DC voltage drop method, that is, a current I of not less than 100A is output between I1 and I2. A voltmeter V is installed between U1 and U2 inside the instrument. The instrument calculates the resistance value based on the collected voltage and current.

[0008] like Figure 6-1 As shown, the current-carrying section is between points J2 and J3, and the voltmeter is connected between points J1 and J4. Since no current flows between J1 and J2, and between J3 and J4, it is equivalent to an extension of the voltage test line. The measured resistance is the resistance between points J2 and J3.

[0009] like Figure 6-2 As shown, the current-carrying section is between points J1 and J3, and the voltmeter is connected between points J2 and J4. Since no current flows between J3 and J4, it is equivalent to an extension of the voltage test lead. The measured resistance is the resistance between points J2 and J3.

[0010] like Figure 6-3 As shown, the current-carrying section is between points J1 and J4, the voltmeter is connected between points J2 and J3, and the measured resistance is the resistance between points J2 and J3.

[0011] like Figure 6-4 As shown, the current-carrying section is between points J2 and J4, and the voltmeter is connected between points J1 and J3. Since no current flows between J1 and J2, it is equivalent to an extension of the voltage test lead. The measured resistance is the resistance between points J2 and J3.

[0012] That is, the resistance measured by the loop resistance tester is the resistance of the current-carrying part between the two voltage measuring lines.

[0013] Existing technical issues and considerations:

[0014] How to solve the technical problem of inaccurate measurement of circuit resistance. Summary of the Invention

[0015] The technical problem to be solved by the present invention is to provide a system, method and application for detecting the loop resistance of a grounding switch, thereby solving the technical problem of being unable to measure the loop resistance of a grounding switch.

[0016] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A system for detecting loop resistance based on a grounding switch includes a loop resistance tester and a grounding switch. The grounding switch includes a base and a gate body connected to the base. The base supports the gate body, and the gate body is used for electrical connection or disconnection. The gate body includes a gate body, a first conductor, a second conductor, and a connector. The conductor and the connector are connected or separated through the gate body. The first conductor and the connector form a first branch, and the second conductor and the connector form a second branch. The connection or separation of the first conductor and the connector causes the first branch to be connected or disconnected accordingly, and the connection or separation of the second conductor and the connector causes the second branch to be connected or disconnected accordingly. The end of the first branch away from the connector is the lead-out end of the first branch, and the end of the second branch away from the connector is the lead-out end of the second branch. The lead-out end of the first branch of the grounding switch is used to connect to the first pair of measuring terminals of the loop resistance tester, and the lead-out end of the second branch of the grounding switch is used to connect to the second pair of measuring terminals. This is the first detection system.

[0017] A system for detecting loop resistance based on a grounding switch includes a loop resistance tester and a grounding switch. The grounding switch includes a base and a switch body connected to the base. The base supports the switch body, and the switch body is used for electrical connection or disconnection. The switch body includes a switch body, a first conductor, a second conductor, and a connector. The conductor and the connector are connected or separated through the switch body. The first conductor and the connector form a first branch, and the second conductor and the connector form a second branch. Connecting or separating the first conductor from the connector causes the first branch to be electrically connected or disconnected accordingly, and connecting or separating the second conductor from the connector causes the second branch to be electrically connected or disconnected accordingly. The end of the first branch furthest from the connector is the first branch. The lead-out terminal of the first grounding switch is located at the end of the second branch furthest from the connector. The grounding switch includes a first grounding switch and a second grounding switch. The lead-out terminal of the first branch of the first grounding switch is connected to the first current measurement terminal of the loop resistance tester. The lead-out terminal of the second branch of the first grounding switch is connected to the first voltage measurement terminal. The lead-out terminal of the first branch of the second grounding switch is connected to the second voltage measurement terminal. The lead-out terminal of the second branch of the second grounding switch is connected to the second current measurement terminal. The connector of the first grounding switch is used to connect to one end of the circuit breaker under test, and the connector of the second grounding switch is used to connect to the other end of the circuit breaker under test. This constitutes the second detection system.

[0018] A further technical solution is that the gate body includes a plate, the first conductor and the second conductor are both fixedly connected to the plate, and the plate is inserted into or separated from the connector.

[0019] A further technical solution is that the connector is fixedly connected to the base, and the plate is movably connected to the base.

[0020] A further technical solution is that the plate is fixedly connected to the base, and the connector is movably connected to the base.

[0021] A further technical solution includes a third conductor, wherein the substrate is a shell, the connector is fixedly connected inside the shell, one end of the third conductor is connected to the connector, and the other end of the third conductor extends out of the shell.

[0022] A further technical solution is that: the gate body includes a rod, the first conductor and the second conductor are connected to the rod, the rod is inserted into and slidably fitted with the housing, one end of the rod is inserted into the housing, and the rod is inserted into or separated from the connector.

[0023] A further technical solution is that the gate body also includes a bracket, which is fixedly connected to the housing. The first conductor, the second conductor, and the rod are fixedly connected together to form a blade. The blade is inserted into and slidably engaged with the housing, and the blade is inserted into and slidably engaged with the bracket.

[0024] A further technical solution is that the bracket is used to seal the gap between the housing and the blade.

[0025] A further technical solution is that the cross-sectional shape of the blade is circular.

[0026] A further technical solution is that the first conductor is located on one side of the rod, and the second conductor is located on the other side of the rod.

[0027] A further technical solution is as follows: the rod body is a tube body, the first conductor is fixedly connected to the outside of the tube body, the second conductor is fixedly connected to the inside of the tube body, a through hole is provided on the tube body, one end of the through hole is connected to the second conductor, the other end of the through hole passes through the side wall of the tube body, and the second conductor is connected to or separated from the connector through the hole.

[0028] A further technical solution includes a conductive block and a terminal block, both of which are fixedly connected to the substrate to form a wiring unit. The wiring unit includes a first wiring unit and a second wiring unit. The first wiring unit includes a first conductive block and a first terminal block. The first conductive block is connected to a first conductor and is electrically connected to the first terminal block. The second wiring unit includes a second conductive block and a second terminal block. The second conductive block is connected to a second conductor and is electrically connected to the second terminal block.

[0029] A further technical solution is that the first conductor overlaps and slides with the first conductive block, and the second conductor overlaps and slides with the second conductive block.

[0030] A further technical solution is that the outer surface of the via overlaps and slides with the second conductive block.

[0031] A further technical solution includes a contact, which comprises a first contact and a second contact. The first contact is fixedly connected to a first conductor. The first conductor, the first contact, and the connector form a first branch. The first conductor is connected to or separated from the connector through the first contact. The second contact is fixedly connected to a second conductor. The second conductor, the second contact, and the connector form a second branch. The second conductor is connected to or separated from the connector through the second contact.

[0032] A method for detecting the loop resistance of a grounding switch, based on a first detection system, includes the step of measuring the loop resistance of the grounding switch. The step of measuring the loop resistance of the grounding switch includes connecting a first pair of measuring terminals of a loop resistance tester to the connector of the grounding switch through a first branch, and connecting a second pair of measuring terminals to the connector of the grounding switch through a second branch, thereby measuring and obtaining the loop resistance of the grounding switch.

[0033] A method for detecting circuit resistance based on a grounding switch, based on a second detection system, includes the step of measuring the circuit resistance of a circuit breaker. The step of measuring the circuit resistance of a circuit breaker includes connecting a first current measuring terminal of a circuit resistance tester to a connector of a first grounding switch through a first branch of the first grounding switch; connecting a first voltage measuring terminal to a connector of a first grounding switch through a second branch of the first grounding switch; connecting a second voltage measuring terminal to a connector of a second grounding switch through a first branch of the second grounding switch; and connecting a second current measuring terminal to a connector of a second grounding switch through a second branch of the second grounding switch, thereby measuring and obtaining the circuit resistance of the circuit breaker under test.

[0034] One application, based on a first detection system, is to measure and obtain the loop resistance of a grounding switch.

[0035] One application, based on a second detection system, is to accurately measure and obtain the loop resistance of a circuit breaker under test.

[0036] The beneficial effects of adopting the above technical solution are as follows:

[0037] First, a system for detecting the loop resistance of a grounding switch includes a loop resistance tester and a grounding switch. The grounding switch includes a base and a gate body connected to the base. The base supports the gate body, and the gate body is used for electrical connection or disconnection. The gate body includes a gate body, a first conductor, a second conductor, and a connector. The conductor and the connector are connected or separated through the gate body. The first conductor and the connector form a first branch, and the second conductor and the connector form a second branch. Connecting or separating the first conductor from the connector causes the first branch to conduct or disconnect accordingly, and connecting or separating the second conductor from the connector causes the second branch to conduct or disconnect accordingly. The end of the first branch furthest from the connector is the lead-out end of the first branch, and the end of the second branch furthest from the connector is the lead-out end of the second branch. The lead-out end of the first branch of the grounding switch is used to connect to the first pair of measuring terminals of the loop resistance tester, and the lead-out end of the second branch of the grounding switch is used to connect to the second pair of measuring terminals. This is the first detection system. This technical solution measures the loop resistance of the grounding switch through the loop resistance tester and the two branches of the grounding switch.

[0038] Second, a system for detecting loop resistance based on a grounding switch includes a loop resistance tester and a grounding switch. The grounding switch includes a base and a switch body connected to the base. The base supports the switch body, and the switch body is used for electrical connection or disconnection. The switch body includes a switch body, a first conductor, a second conductor, and a connector. The conductor and the connector are connected or separated through the switch body. The first conductor and the connector form a first branch, and the second conductor and the connector form a second branch. The connection or separation of the first conductor and the connector causes the first branch to be connected or disconnected accordingly, and the connection or separation of the second conductor and the connector causes the second branch to be connected or disconnected accordingly. The end of the first branch furthest from the connector is the first branch. The second branch's lead-out end, located furthest from the connector, is the lead-out end of the second branch. The grounding switch includes a first grounding switch and a second grounding switch. The lead-out end of the first branch of the first grounding switch is connected to the first current measurement terminal of the loop resistance tester. The lead-out end of the second branch of the first grounding switch is connected to the first voltage measurement terminal. The lead-out end of the first branch of the second grounding switch is connected to the second voltage measurement terminal. The lead-out end of the second branch of the second grounding switch is connected to the second current measurement terminal. The connector of the first grounding switch is used to connect to one end of the circuit breaker under test, and the connector of the second grounding switch is used to connect to the other end of the circuit breaker under test. This constitutes the second detection system. This technical solution, through a loop resistance tester and two grounding switches, accurately measures and obtains the loop resistance of the circuit breaker under test.

[0039] Third, a method for detecting the loop resistance of a grounding switch, based on a first detection system, includes the step of measuring the loop resistance of the grounding switch. The step of measuring the loop resistance of the grounding switch includes connecting a first pair of measuring terminals of a loop resistance tester to the connector of the grounding switch through a first branch, and connecting a second pair of measuring terminals to the connector of the grounding switch through a second branch, thereby measuring and obtaining the loop resistance of the grounding switch.

[0040] Fourth, a method for detecting circuit resistance based on a grounding switch, based on a second detection system, includes the step of measuring the circuit resistance of a circuit breaker. The step of measuring the circuit resistance of a circuit breaker includes connecting a first current measuring terminal of a circuit resistance tester to a connector of the first grounding switch through a first branch of the first grounding switch, connecting a first voltage measuring terminal to a connector of the first grounding switch through a second branch of the first grounding switch, connecting a second voltage measuring terminal to a connector of the second grounding switch through a first branch of the second grounding switch, and connecting a second current measuring terminal to a connector of the second grounding switch through a second branch of the second grounding switch, thereby measuring and obtaining the circuit resistance of the circuit breaker under test.

[0041] Fifth, an application, based on the first detection system, includes the application of measuring and obtaining the loop resistance of a grounding switch.

[0042] Sixth, an application, based on the second detection system, for accurately measuring and obtaining the loop resistance of the circuit breaker under test.

[0043] See the detailed implementation section for further description. Attached Figure Description

[0044] Figure 1 This is a structural diagram of Example 1;

[0045] Figure 2 This is a structural diagram of the blade body in Example 2;

[0046] Figure 3 This is a structural diagram of Example 3;

[0047] Figure 4 This is the wiring diagram for Example 4;

[0048] Figure 5 This is the wiring diagram for Example 5;

[0049] Figure 6-1 This is the first wiring diagram of the research process;

[0050] Figure 6-2 This is the second wiring diagram of the research process;

[0051] Figure 6-3 This is the second wiring diagram of the research process;

[0052] Figure 6-4 This is the second wiring diagram of the research process;

[0053] Figure 7 This is a wiring diagram for detecting the circuit resistance of a circuit breaker in the existing technology;

[0054] Figure 8 This is a structural diagram of a GIS ground cutter in existing technology.

[0055] The components are as follows: 1. Housing, 2. Round rod, 3. First grounding rod conductor, 4. Second grounding rod conductor, 5. Center conductor, 6. Stationary contact, 7. First moving contact, 8. Second moving contact, 9. First conductive block, 10. First terminal block, 11. First insulating pad, 12. Second conductive block, 13. Second terminal block, 14. Second insulating pad, 15. Insulating support, 16. Tube body, 17. First conductive layer, 18. Second conductive layer, 19. Through hole, 20. First annular contact, 21. Second annular contact, 22. Substrate, 23. Lever, 24. First conductive sheet, 25. Second conductive sheet, 26. Connecting groove, 27. Loop resistance tester, 28. First grounding switch, 29. Second grounding switch, 30. First lead-out end, 31. Second lead-out end, 32. Third lead-out end, 33. Fourth lead-out end, 34. Grounding rod, 35. Moving contact. Detailed Implementation

[0056] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0057] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0058] Example 1:

[0059] like Figure 1 As shown, the present invention discloses a grounding switch including a base, a switch body and a wiring unit. The switch body and the wiring unit are both connected to the base. The base is used to support the switch body, and the switch body is used to electrically connect or disconnect.

[0060] like Figure 1As shown, the base is a shell 1, and the gate body includes a gate body, a first conductor, a second conductor, a third conductor, a connector, a first contact, and a second contact. The gate body includes a rod and a support. The rod is an insulated T-shaped round rod 2. The first conductor is a first grounding rod conductor 3, the second conductor is a second grounding rod conductor 4, and the third conductor is a center conductor 5. The connector is a C-shaped stationary contact 6, the first contact is a first moving contact 7, and the second contact is a second moving contact 8. The first grounding rod conductor 3 is fixedly connected to one side of the T-shaped round rod 2, and the second grounding rod conductor 4 is fixedly connected to the other side of the T-shaped round rod 2.

[0061] The first contact, the second contact, the first conductor, the second conductor, and the rod are fixedly connected together to form a blade body, and the cross-sectional shape of the blade body is circular.

[0062] The stationary contact 6 is fixedly connected inside the housing 1, one end of the central conductor 5 is connected to the stationary contact 6, and the other end of the central conductor 5 extends out of the housing 1.

[0063] like Figure 1 As shown, the bracket is an insulating support 15, which is fixedly connected to the housing 1 and seals the gap between the housing 1 and the blade body. The blade body is inserted into and slidably engaged with the housing 1, and also inserted into and slidably engaged with the bracket. The end of the blade body with the moving contact is inserted into the interior of the housing 1, and the moving contact of the blade body is either inserted into or separated from the C-shaped stationary contact 6. This allows the conductor and connector to be connected or separated through the gate body.

[0064] like Figure 1 As shown, the wiring unit includes a first wiring unit and a second wiring unit with the same structure. The first wiring unit includes a first conductive block 9, a first terminal block 10 and a first insulating pad 11. The second wiring unit includes a second conductive block 12, a second terminal block 13 and a second insulating pad 14. The conductive block and the insulating pad are both fixedly connected to the housing 1. The terminal blocks are all fixedly connected to the insulating pad. The first terminal block 10 is fixedly connected to the first insulating pad 11.

[0065] like Figure 1 As shown, the first moving contact 7 is fixedly connected to the first grounding rod conductor 3, the first grounding rod conductor 3 overlaps and slides with the first conductive block 9, the first conductive block 9 is electrically connected to the first terminal 10, and the first terminal 10, the first conductive block 9, the first grounding rod conductor 3 and the first moving contact 7 are sequentially electrically connected and connected. The second moving contact 8 is fixedly connected to the second grounding rod conductor 4, the second grounding rod conductor 4 overlaps and slides with the second conductive block 12, the second conductive block 12 is electrically connected to the second terminal 13, and the second terminal 13, the second conductive block 12, the second grounding rod conductor 4 and the second moving contact 8 are sequentially electrically connected and connected.

[0066] like Figure 1 As shown, the round rod 2 is an insulated T-shaped rod. The first terminal 10, the first conductive block 9, the first grounding rod conductor 3, the first moving contact 7, and the C-shaped stationary contact 6 form the first branch. The first grounding rod conductor 3 is electrically connected to or disconnected from the C-shaped stationary contact 6 through the first moving contact 7, so that the first branch is connected or disconnected accordingly. The second terminal 13, the second conductive block 12, the second grounding rod conductor 4, the second moving contact 8, and the C-shaped stationary contact 6 form the second branch. The second grounding rod conductor 4 is electrically connected to or disconnected from the C-shaped stationary contact 6 through the second moving contact 8, so that the second branch is connected or disconnected accordingly.

[0067] During use, the housing 1 is filled with gas for insulation, ensuring good insulation between the stationary contact 6 and the housing 1. The housing 1 is a conductive housing used for grounding.

[0068] When in use, the grounding switch should be installed inside the GIS.

[0069] Compared to Embodiment 1, a drive mechanism or transmission mechanism can also be provided to control the toggle switch body and realize the connection or disconnection of the grounding switch. The drive mechanism and transmission mechanism are existing technologies and will not be described in detail.

[0070] Compared to Embodiment 1, an accessory for a grounding switch can also be provided to improve the performance of the grounding switch. The accessory for the grounding switch itself is existing technology and will not be described in detail here.

[0071] Example 2:

[0072] The difference between Example 2 and Example 1 is that the structure of the blade is different.

[0073] like Figure 2 As shown, this invention discloses a grounding switch comprising a base, a switch body, and a wiring unit. Both the switch body and the wiring unit are connected to the base. The base supports the switch body, and the switch body is used for electrical connection or disconnection. The rod body is a circular tube 16. The first conductor is a first conductive layer 17, and the second conductor is a second conductive layer 18. A through hole 19 is connected to the tube 16. The first contact is a first annular contact 20, and the second contact is a second annular contact 21.

[0074] The first conductive layer 17 is covered and fixedly connected to the outside of the tube body 16. The first conductive layer 17 overlaps and slides with the first conductive block 9. The second conductive layer 18 is coated and fixedly connected to the inside of the tube body 16. One end of the through hole 19 is connected to the second conductive layer 18 inside the tube body 16. The other end of the through hole 19 passes through the side wall of the tube body 16. The outer surface of the through hole 19 overlaps and slides with the second conductive block 12.

[0075] The first annular contact 20 is fixedly connected to the outside of one end of the tube body 16. The first annular contact 20 is fixedly connected to the first conductive layer 17. The first annular contact 20 is either inserted into or separated from the C-shaped stationary contact 6.

[0076] The second annular contact 21 is fixedly connected to the inner side of one end of the tube body 16. The second annular contact 21 is fixedly connected to the second conductive layer 18. One end of the second annular contact 21 extends out from the end of the tube body 16. The second annular contact 21 is inserted into or separated from the C-shaped stationary contact 6.

[0077] Compared to Example 2, the tube body can also be a square tube body.

[0078] Example 3:

[0079] like Figure 3 As shown, the present invention discloses a grounding switch including a base and a switch body. The switch body is connected to the base, the base is used to support the switch body, and the switch body is used to electrically connect or disconnect.

[0080] like Figure 3 As shown, the substrate is a base plate 22, which is an insulating plate. The gate body includes a gate body, a first conductor, a second conductor, and a connector. The gate body is a plate, which is an insulated T-shaped lever 23. The first conductor is a first conductive sheet 24, the second conductor is a second conductive sheet 25, and the connector is a C-shaped conductive connecting groove 26. The first conductive sheet 24 is fixedly connected to one side of the T-shaped lever 23, and the second conductive sheet 25 is fixedly connected to the other side of the T-shaped lever 23.

[0081] like Figure 3 As shown, the first conductive sheet 24, the second conductive sheet 25, and the lever 23 are fixedly connected together to form a blade body, which is an H-shaped double-blade single-throw blade body. One end of the blade body is hinged to the base plate 22, and the other end of the blade body is inserted into or separated from the connecting groove 26. This allows the conductor and the connector to be connected or separated through the gate body.

[0082] The first conductive piece 24 and the connecting groove 26 form a first branch. The first conductive piece 24 and the connecting groove 26 are electrically connected or disconnected, so that the first branch is connected or disconnected accordingly. The second conductive piece 25 and the connecting groove 26 form a second branch. The second conductive piece 25 and the connecting groove 26 are electrically connected or disconnected, so that the second branch is connected or disconnected accordingly.

[0083] The first conductor of the gate body is hinged to the base, the second conductor of the gate body is hinged to the base, and the connecting piece is fixedly connected to the base, so as to realize the electrical conduction connection or disconnection of the gate body.

[0084] Compared to embodiment 3, it can also be made into a double-blade, double-throw blade body, with a lever fixedly connected to a conductive sheet, each conductive sheet being hinged to the substrate, and each conductive sheet rotating independently.

[0085] Compared to embodiment 3, the gate body and the base can also be hinged, and the first conductor and the second conductor are both fixedly connected to the gate body.

[0086] Compared to Example 3, the conductor and the substrate can also be made to rotate and connect.

[0087] Compared to embodiment 3, the gate body and the base can also be made to rotate and connect.

[0088] Compared to embodiment 3, the first and second conductors can also be fixedly connected to the base, the gate body is movably connected to the base, and the connecting member is fixedly connected to the gate body. For example, the gate body can be a slider, which is slidably connected to the base. Alternatively, the gate body can be a rotating shaft, which is rotatably connected to the base.

[0089] Compared to Embodiment 3, a wiring unit can be further provided to facilitate wire connection; similarities will not be described again.

[0090] Compared to embodiment 3, a drive mechanism or transmission mechanism can be further provided to control the movement of the toggle switch body, thereby enabling the grounding switch to be turned on or off. The drive mechanism and transmission mechanism are existing technologies and will not be described in detail here.

[0091] Compared to embodiment 3, an accessory with a grounding switch can be further provided to improve the performance of the grounding switch. The accessory itself is existing technology and will not be described in detail.

[0092] Example 4:

[0093] like Figure 4 As shown, the present invention discloses a system for detecting loop resistance based on a grounding switch, including a loop resistance tester 27 and a grounding switch. The grounding switch is the grounding switch in Embodiment 1. The end of the first branch away from the connector is the lead-out end of the first branch, i.e., the first terminal 10. The end of the second branch away from the connector is the lead-out end of the second branch, i.e., the second terminal 13. The lead-out end of the first branch of the grounding switch is connected to the first pair of measuring terminals of the loop resistance tester 27, i.e., the first current measuring terminal I1 is connected to the first terminal 10, and the first voltage measuring terminal U1 is connected to the first terminal 10. The lead-out end of the second branch of the grounding switch is connected to the second pair of measuring terminals of the loop resistance tester 27, i.e., the second voltage measuring terminal U is connected to the second terminal 13, and the second current measuring terminal I1 is connected to the second terminal 13.

[0094] Example 5:

[0095] like Figure 5 As shown, the present invention discloses a system for detecting loop resistance based on a grounding switch, including a loop resistance tester 27 and a grounding switch. The grounding switch is the grounding switch in Embodiment 1. The end of the first branch away from the connector is the lead-out end of the first branch, and the end of the second branch away from the connector is the lead-out end of the second branch.

[0096] like Figure 5 As shown, the grounding switch includes a first grounding switch 28 and a second grounding switch 29. The first branch lead-out terminal 30 of the first grounding switch 28 is connected to the first current measuring terminal I1 of the loop resistance tester 27. The second branch lead-out terminal 31 of the first grounding switch 28 is connected to the first voltage measuring terminal U1. The first branch lead-out terminal 32 of the second grounding switch 29 is connected to the second voltage measuring terminal U2. The second branch lead-out terminal 33 of the second grounding switch 29 is connected to the second current measuring terminal I2. The connecting piece of the first grounding switch 28 is connected to one end of the circuit breaker under test through its central conductor. The connecting piece of the second grounding switch 29 is connected to the other end of the circuit breaker under test through its central conductor.

[0097] Example 6:

[0098] This invention discloses a method for detecting the loop resistance of a grounding switch. Based on the system of Embodiment 4, the method includes the step of measuring the loop resistance of the grounding switch. The step of measuring the loop resistance of the grounding switch includes connecting the first pair of measuring terminals of the loop resistance tester to the connector of the grounding switch through the first branch, and connecting the second pair of measuring terminals to the connector of the grounding switch through the second branch, thereby measuring and obtaining the loop resistance of the grounding switch.

[0099] Example 7:

[0100] This invention discloses a method for detecting circuit resistance based on a grounding switch. Based on the system of Embodiment 5, the method includes the step of measuring the circuit resistance of a circuit breaker. This step involves connecting a first current measuring terminal of a circuit resistance tester to a connector of the first grounding switch via a first branch of the first grounding switch; connecting a first voltage measuring terminal to a connector of the first grounding switch via a second branch of the first grounding switch; connecting a second voltage measuring terminal to a connector of the second grounding switch via a first branch of the second grounding switch; and connecting a second current measuring terminal to a connector of the second grounding switch via a second branch of the second grounding switch. The circuit resistance of the circuit breaker under test is then measured and obtained.

[0101] Example 8:

[0102] The present invention discloses an application, based on the system of embodiment 4, which includes the following application: for measuring and obtaining the loop resistance of a grounding switch.

[0103] Example 9:

[0104] The present invention discloses an application, based on the system of embodiment 5, which includes the following application: for accurately measuring and obtaining the loop resistance of the circuit breaker under test.

[0105] The research and development approach of this project is as follows:

[0106] 1. Technical problems to be solved

[0107] like Figure 7 The diagram shown is a conventional test wiring diagram for the circuit resistance of circuit breaker K2. Only circuit breaker K2 is under maintenance. Due to grid operation and other factors, the status of adjacent equipment such as G21, G22, D4, and D7 cannot be changed. #1 busbar, #2 busbar.

[0108] The following problems exist:

[0109] A. Without disassembling the circuit, the resistance of the grounding switch circuit cannot be accurately tested.

[0110] B. Remove the grounding connectors from grounding points cd5 and cd6 of grounding switches D5 and D6. Connect I1 and U1 to cd5, and I2 and U2 to cd6. Close D5, D6, and K2. Open G21 and G22. Operate the circuit resistance tester to test the circuit resistance of K2. The test result is the sum of the circuit resistances of grounding switches D5 and D6, and circuit breaker K2. Excessive circuit resistance in any one or more of the following devices—grounding switches D5, D6, and circuit breaker K2—will cause abnormal test results. It will be impossible to accurately determine whether the circuit resistance of K2 is within acceptable limits or whether K2 is abnormal.

[0111] 2. Technical Solution

[0112] like Figure 8 The diagram shows the structure of a conventional GIS grounding bar. The GIS has a central conductor 5 in the middle, with a stationary contact 6 mounted on it. Both the conductor and the central conductor are metal. The outer casing 1 is also metal, with an insulating support 15 and a first insulating pad 11 mounted on it. This serves to fix and insulate the conductor in the middle of the insulating support from the casing. A grounding rod 34 is located in the middle of the insulating support 15, with a sliding seal between them. The grounding rod 34 is electrically connected to a first conductive block 9. The conductive block 9 is connected to one end of the grounding terminal 10 via a conductor, and the other end is grounded via a wire. The grounding rod can move left and right under the action of the mechanism. This allows the moving contact 35 of the grounding rod to move to the right and insert into the stationary contact 6 to ground the central conductor 5, or to move to the left to be close to the casing, thus de-grounding the central conductor 5. The specific operating mechanism is existing technology and will not be described in detail.

[0113] like Figure 1The diagram shows the structure of the improved GIS grounding bar. Insulation divides the grounding rod into two parts: a first conductor and a second conductor. Insulation also divides the moving contact into two parts: a first moving contact and a second moving contact. Additionally, a second moving contact, a second conductive block, a second grounding terminal, and an insulating support 15 are added. Moving the grounding rod to the right causes the first and second moving contacts to insert into the stationary contact, allowing the center conductor to pass through the following paths: stationary contact → first moving contact → first conductor of the grounding rod → first conductive block → wire → first grounding terminal; stationary contact → second moving contact → second conductor of the grounding rod → second conductive block → wire → second grounding terminal. Moving the grounding rod to the left moves the first and second moving contacts away from the center conductor, until they are close to the casing, thus de-grounding the center conductor.

[0114] The inventive concept of this application:

[0115] like Figure 5 As shown, grounding switches D5 and D6, which employ an innovative structure, are disconnected from their grounding terminals. I1 represents the first grounding terminal of grounding switch D5, U1 represents the second grounding terminal of grounding switch D5, I2 represents the second grounding terminal of grounding switch D6, and U2 represents the first grounding terminal of grounding switch D6. D5, D6, and K2 are then placed in the closed position. A loop resistance tester is used to measure the loop resistance. Because the voltage lines connect to the stationary contacts on both sides of K2 via their respective grounding terminals → wires → conductive sliders → grounding rod conductors → moving contacts, the test result is the accurate loop resistance of K2.

[0116] like Figure 4 As shown, the output current flows through the first grounding terminal → wire → first conductive block → first conductor of the grounding rod → first moving contact → stationary contact → second moving contact → second conductor of the grounding rod → second conductive block → wire → second grounding terminal back to the loop resistance tester, accurately measuring the resistance of the grounding switch loop, thus solving the problem that the resistance of the grounding switch loop cannot be measured without disassembly.

[0117] The conductive rod can also be designed as a hollow structure, with the outside used for current carrying and the inside insulated from the outside by the same conductor. When the circuit is closed, the internal conductor presses against the vertical surface of the stationary contact. When the circuit is pulled out, the internal conductor is led out through the small holes in the hollow structure wall and connected to the two grounding terminals respectively.

[0118] After this application had been running internally for a period of time, the beneficial aspects reported by on-site technicians were:

[0119] The circuit resistance of the circuit breaker inside the GIS can be accurately tested by only controlling the states of K2, D5, and D6, eliminating interference from the grounding switch during the test.

[0120] It can accurately test the resistance of the grounding switch circuit without disassembly or relying on the status of other equipment.

[0121] Currently, the technical solution of this invention has undergone pilot testing, which is a small-scale trial of the product before large-scale mass production. After the pilot testing was completed, a user survey was conducted on a small scale, and the survey results showed that user satisfaction was high. Now, preparations have begun for the formal production and industrialization of the product (including intellectual property risk warning surveys).

Claims

1. A system for detecting loop resistance based on a grounding switch, comprising a loop resistance tester, characterized in that: It also includes a grounding switch, which comprises a base, a switch body connected to the base, a conductive block, and terminals. The base supports the switch body, which is used for electrical connection or disconnection. The conductive block and terminals are fixedly connected to the base and form a wiring unit. The base is a shell. The switch body includes a switch body, a first conductor, a second conductor, a third conductor, a connector, and contacts. The switch body includes a rod and a bracket. The bracket is fixedly connected to the shell, and the connector is fixedly connected inside the shell. The first and second conductors are connected to the rod. The rod is inserted into and slidably fitted with the shell. One end is inserted into the housing, and the rod is either inserted into or separated from the connector; the first conductor, the second conductor, and the rod are fixedly connected together to form a blade, which is inserted into and slidably fitted to the housing, and also inserted into and slidably fitted to a bracket, which is used to seal the gap between the housing and the blade; one end of the third conductor is connected to the connector, and the other end of the third conductor extends out of the housing; the contacts include a first contact and a second contact; the wiring unit includes a first wiring unit and a second wiring unit, the first wiring unit including a first conductive block and a first terminal, the first conductive block being connected to the first conductor, and the first conductive block being connected to... The first terminal block is electrically connected. The second wiring unit includes a second conductive block and a second terminal block. The second conductive block is connected to a second conductor and is electrically connected to the second terminal block. A first contact is fixedly connected to the first conductor. The first conductor, the first contact, and the connector form a first branch. The first conductor is connected to or separated from the connector through the first contact. A second contact is fixedly connected to the second conductor. The second conductor, the second contact, and the connector form a second branch. The second conductor is connected to or separated from the connector through the second contact. The first conductor overlaps and slides with the first conductive block. The second conductor and the second conductive block... The components are overlapped and slidably fitted; the first conductor and the connector form the first branch, and the second conductor and the connector form the second branch. The connection or separation of the first conductor and the connector causes the first branch to be connected or disconnected accordingly, and the connection or separation of the second conductor and the connector causes the second branch to be connected or disconnected accordingly. The end of the first branch away from the connector is the lead-out end of the first branch, and the end of the second branch away from the connector is the lead-out end of the second branch. The lead-out end of the first branch of the grounding switch is used to connect to the first pair of measuring terminals of the loop resistance tester, and the lead-out end of the second branch of the grounding switch is used to connect to the second pair of measuring terminals.

2. The system for detecting the resistance of a grounding switch circuit according to claim 1, characterized in that: The grounding switch includes a first grounding switch and a second grounding switch. The lead-out terminal of the first branch of the first grounding switch is used to connect to the first current measurement terminal of the loop resistance tester. The lead-out terminal of the second branch of the first grounding switch is used to connect to the first voltage measurement terminal. The lead-out terminal of the first branch of the second grounding switch is used to connect to the second voltage measurement terminal. The lead-out terminal of the second branch of the second grounding switch is used to connect to the second current measurement terminal. The connector of the first grounding switch is used to connect to one end of the circuit breaker under test. The connector of the second grounding switch is used to connect to the other end of the circuit breaker under test.

3. The system for detecting the resistance of a grounding switch circuit according to claim 1, characterized in that: The first conductor is located on one side of the rod, and the second conductor is located on the other side of the rod. The cross-sectional shape of the blade is circular. Alternatively, the rod is a tube, with the first conductor fixedly connected to the outside of the tube and the second conductor fixedly connected to the inside of the tube. A through hole is provided on the tube, with one end of the through hole connected to the second conductor and the other end of the through hole passing through the side wall of the tube.

4. A method for detecting loop resistance based on a grounding switch, characterized in that: The detection system based on claim 1 includes the step of measuring the loop resistance of a grounding switch. The step of measuring the loop resistance of the grounding switch includes connecting a first pair of measuring terminals of a loop resistance tester to the connector of the grounding switch through a first branch, and connecting a second pair of measuring terminals to the connector of the grounding switch through a second branch, thereby measuring and obtaining the loop resistance of the grounding switch.

5. A method for detecting loop resistance based on a grounding switch, characterized in that: The detection system based on claim 2 includes the step of measuring the circuit breaker loop resistance. The step of measuring the circuit breaker loop resistance includes connecting a first current measuring terminal of the loop resistance tester to a connector of the first grounding switch through a first branch of the first grounding switch, connecting a first voltage measuring terminal to a connector of the first grounding switch through a second branch of the first grounding switch, connecting a second voltage measuring terminal to a connector of the second grounding switch through a first branch of the second grounding switch, and connecting a second current measuring terminal to a connector of the second grounding switch through a second branch of the second grounding switch, thereby measuring and obtaining the loop resistance of the circuit breaker under test.

6. An application, characterized in that: The detection system based on claim 1 is used to measure and obtain the loop resistance of a grounding switch.

7. An application, characterized in that: The detection system based on claim 2 is used to accurately measure and obtain the loop resistance of the circuit breaker under test.

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