CN220543096U - DC ground fault simulation box - Google Patents
DC ground fault simulation box Download PDFInfo
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- CN220543096U CN220543096U CN202321523606.4U CN202321523606U CN220543096U CN 220543096 U CN220543096 U CN 220543096U CN 202321523606 U CN202321523606 U CN 202321523606U CN 220543096 U CN220543096 U CN 220543096U
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- 238000004088 simulation Methods 0.000 title claims abstract description 49
- 238000005259 measurement Methods 0.000 claims abstract description 50
- 238000012360 testing method Methods 0.000 claims abstract description 28
- 238000009413 insulation Methods 0.000 abstract description 14
- 238000012544 monitoring process Methods 0.000 abstract description 4
- 238000007689 inspection Methods 0.000 abstract description 3
- 238000012806 monitoring device Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The utility model relates to the technical field of fault simulation boxes, in particular to a direct current ground fault simulation box. The device comprises a box body, wherein a total idle switch, a switching handle, a voltmeter, an ohmmeter, a measurement idle switch, a potentiometer and a grounding terminal are arranged in the box body; the power side of the main switch is connected with the positive electrode contact and the negative electrode contact of an external test direct current system, and the load side of the main switch is connected with the switching handle; the switching handle is provided with three gears, namely a 1-gear working circuit, a 2-gear working circuit and a 0-gear working circuit. The positive electrode and the negative electrode of the test simulation can be randomly switched through the switching handle, the test only needs one-time wiring, the positive ground fault simulation and the negative ground fault simulation can be respectively carried out, and the three modes of ground resistance value measurement are adopted, so that the insulation monitoring inspection simulation work of the direct current system is standardized, the operation is simplified, the test wiring times are reduced, the working efficiency is improved, and the safety and the convenience are greatly improved.
Description
Technical Field
The utility model relates to the technical field of fault simulation boxes, in particular to a direct current ground fault simulation box.
Background
The direct current system for the plant has an important function for the power plant, and the direct current system is provided with an insulation monitoring system. The system needs to periodically detect the fault simulation device, simulate faults and check the operation condition of the insulation monitoring device.
In the prior art, the simulation fault is generally carried out by simply using one variable resistor to ground, the positive electrode and the negative electrode which are simulated by the test cannot be switched at will, the wires are required to be disassembled and measured for many times, the personnel technical level of workers is excessively relied on, and the safety and the convenience are poor. Accordingly, the present utility model has been made to solve the above-mentioned problems occurring in the prior art.
Disclosure of Invention
The utility model aims to provide a direct current ground fault simulation box which can randomly switch the anode and the cathode of test simulation, does not need to take out the line for measurement for multiple times, and has the advantages of simple operation, less test wiring times and high safety and convenience.
The utility model provides a direct-current ground fault simulation box which comprises a box body, wherein a total open, a switching handle, a voltmeter, a potentiometer, an ohmmeter and a measurement open and ground terminal are arranged in the box body;
the power side of the total open is connected with the positive electrode contact and the negative electrode contact of an external test direct current system, and the load side of the total open is connected with the switching handle;
the two sides of the switching handle are provided with 8 connecting points, wherein the first connecting point, the third connecting point, the fifth connecting point and the seventh connecting point are positioned on the same side, and the second connecting point, the fourth connecting point, the sixth connecting point and the eighth connecting point are positioned on the same side;
the switching handle is equipped with three gear, is 1 shelves work return circuit, 2 shelves work return circuits, 0 shelves work return circuit respectively, wherein:
the 1-gear working circuit comprises a positive electrode contact, a main idle switch, a first connecting point of the switching handle, a second connecting point of the switching handle, a potentiometer, a sixth connecting point of the switching handle, a fifth connecting point of the switching handle, a grounding terminal and a ground wire of the external test direct current system which are sequentially connected in series;
the 2-gear working loop comprises the negative electrode contact, the main free switch, a third connecting point of the switching handle, a fourth connecting point of the switching handle, the potentiometer, an eighth connecting point of the switching handle, a seventh connecting point of the switching handle, the grounding terminal and the ground wire which are sequentially connected in series;
the 0-gear working loop comprises the measuring air switch, the ohm meter and the potentiometer which are respectively connected in parallel with the measuring air switch.
Further, the power side of the total open is provided with a first wiring terminal and a third wiring terminal, and the load side of the total open is provided with a second wiring terminal and a fourth wiring terminal.
Further, the voltmeter is provided with a first voltage measurement connecting terminal and a second voltage measurement connecting terminal;
the potentiometer is provided with a first potentiometer connecting terminal and a second potentiometer connecting terminal;
the ohmmeter is provided with a first wiring terminal and a second wiring terminal.
Further, four wiring terminals are arranged in the measuring space, wherein the first wiring terminal and the third wiring terminal are located at the upper end, and the second wiring terminal and the fourth wiring terminal are located at the lower end.
Further, after being interconnected, the second connection point of the switching handle and the fourth connection point of the switching handle are respectively connected with the first voltage measurement wiring terminal, the first potentiometer wiring terminal and the second wiring terminal which is empty in measurement.
Further, a first wiring terminal of the ohmmeter is connected with the first wiring terminal of the measuring space, and a second wiring terminal of the ohmmeter is connected with the third wiring terminal of the measuring space;
and the fourth connecting terminal of the measurement void is respectively connected with the second potentiometer connecting terminal, the second voltage measurement connecting terminal, the sixth connecting point of the switching handle and the eighth connecting point of the switching handle.
Further, the ground terminal is provided with an outer terminal, a first inner terminal and a second inner terminal, the outer terminal is connected with the ground wire, the first inner terminal is connected with the fifth connection point of the switching handle, and the second inner terminal is connected with the seventh connection point of the switching handle.
Further, the 1 st gear working circuit is sequentially connected with the positive electrode contact, the first terminal of the total open, the second terminal of the total open, the first connecting point of the switching handle, the second connecting point of the switching handle, the first potentiometer connecting terminal, the second potentiometer connecting terminal, the sixth connecting point of the switching handle, the fifth connecting point of the switching handle, the first inner side terminal of the grounding terminal, the outer side terminal of the grounding terminal and the ground wire in series.
Further, the 2-gear working circuit is sequentially connected with the negative electrode contact, the third wiring terminal of the total open, the fourth wiring terminal of the total open, the third connection point of the switching handle, the fourth connection point of the switching handle, the first potentiometer connection terminal, the second potentiometer connection terminal, the eighth connection point of the switching handle, the seventh connection point of the switching handle, the second inner side terminal of the grounding terminal, the outer side terminal of the grounding terminal and the ground wire in series.
Further, the 0-gear working loop is a first wiring terminal of the ohmmeter, a first wiring terminal of the measurement open, a second wiring terminal of the measurement open, a first potentiometer wiring terminal, a second potentiometer wiring terminal, a fourth wiring terminal of the measurement open, a third wiring terminal of the measurement open and a second wiring terminal of the ohmmeter which are sequentially connected.
In summary, compared with the prior art, the utility model has the following advantages:
according to the direct-current ground fault simulation box provided by the technical scheme of the utility model, the positive electrode and the negative electrode simulated by the test can be switched at will through the switching handle, the test only needs one-time wiring, and three modes of positive electrode ground fault simulation and negative electrode ground fault simulation can be respectively carried out, and the ground resistance value is measured. When the fault simulation test is carried out, the positive electrode contact and the negative electrode contact of the external test direct current system are connected with the total space switch in the box body, the ground wire is connected with the ground terminal in the box body, the total space switch is in a disconnection state at the moment, the initial state of the switching handle is placed in the 0 th gear, and the measurement space switch is in the disconnection state. When the simulation of the positive electrode ground fault is started, closing a main idle switch, placing a switching handle in 1 gear, performing fault simulation, and adjusting the resistance value of a potentiometer until an insulation monitoring device of an external test direct current system gives an alarm; and then, the switching handle is placed in a 0-grade position, the measurement mode of simulating the resistance value of the grounding resistor is switched to, the measurement is switched on, the resistance value simulating the triggering of the insulation monitoring device to alarm is measured through the ohmmeter, and the resistance value is checked with the insulation monitoring device to determine whether the device acts correctly or not, and the precision meets the requirement or not. When the simulation of the negative electrode ground fault is carried out, the measurement idle switch is only required to be disconnected, the resistance of the potentiometer is reduced to the maximum resistance value, then the switching handle is switched to 2 grades, and the simulation of the positive electrode ground fault is repeated.
According to the technical scheme, fault simulation, measurement and display functions are integrated through the arranged ohmmeter, voltmeter, potentiometer, total idle switch, measurement idle switch and switching handle, so that insulation monitoring and inspection simulation work of a direct current system is standardized, operation is simplified, test wiring times are reduced, working efficiency is improved, personal technical level is not excessively relied on, and safety and convenience are greatly improved.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an internal structure of a DC ground fault simulation box according to an embodiment of the present utility model;
fig. 2 is a schematic diagram of a connection principle of a dc ground fault simulation box according to an embodiment of the present utility model.
Reference numerals illustrate: 1-total open, 101-first terminal, 102-second terminal, 103-third terminal, 104-fourth terminal;
2-switching handle, 201-first connection point, 202-second connection point, 203-third connection point, 204-fourth connection point, 205-fifth connection point, 206-sixth connection point, 207-seventh connection point, 208-eighth connection point;
3-voltmeter, 301-first voltage measurement wiring terminal, 302-second voltage measurement wiring terminal;
4-ohm meter, 401-first wiring terminal, 402-second wiring terminal;
5-measurement open, 501-first wiring terminal, 502-second wiring terminal, 503-third wiring terminal, 504-fourth wiring terminal;
6-potentiometer, 601-first potentiometer connecting terminal, 602-second potentiometer connecting terminal;
7-ground terminal, 701-outside terminal, 702-first inside terminal, 703-second inside terminal;
8-an external test direct current system; l+, positive electrode contact; l-, a negative contact.
Detailed Description
The technical solutions of the present utility model will be clearly and completely described in connection with the embodiments, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise. Furthermore, the terms "mounted," "connected," "coupled," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
Examples
A dc ground fault simulation box as shown in fig. 1.
The box body is internally provided with a total air switch 1, a switching handle 2, a voltmeter 3, a potentiometer 6, an ohmmeter 4, a measurement air switch 5 and a grounding terminal 7, and marks of 0 grade, 1 grade and 2 grade are engraved around the switching handle 2. The potentiometer 6 is provided with a knob, the resistance value of the ground fault is simulated through wiring, the knob is rotated to adjust the resistance value of the potentiometer, and an alarm is triggered when the resistance value reaches an alarm value.
The wiring principle diagram among the elements is shown in fig. 2, the power supply side of the main air switch 1 is provided with a first wiring terminal 101 and a third wiring terminal 103, and the load side is provided with a second wiring terminal 102 and a fourth wiring terminal 104; the first terminal 101 is connected to the positive contact l+ of the external test dc system 8 and the second terminal 102 is connected to the negative contact L-of the external test dc system 8.
The two sides of the switching handle 2 are provided with 8 connection points, wherein the first connection point 201, the third connection point 203, the fifth connection point 205 and the seventh connection point 207 are positioned on the left side, and the second connection point 202, the fourth connection point 204, the sixth connection point 206 and the eighth connection point 208 are positioned on the right side.
The voltmeter 3 is provided with a first voltage measurement terminal 301 and a second voltage measurement terminal 302.
The potentiometer 6 is provided with a first potentiometer connection 601 and a second potentiometer connection 602.
The ohmmeter 4 is provided with a first connection terminal 401 and a second connection terminal 402, and the first connection terminal 401 and the second connection terminal 402 are respectively connected with a first connection terminal 501 and a third connection terminal 503 of the measuring space 5.
The measurement space 5 is provided with four connection terminals, wherein the first connection terminal 501 and the third connection terminal 503 are located at the upper end, the second connection terminal 502 and the fourth connection terminal 504 are located at the lower end, and the fourth connection terminal 504 is respectively connected with the second potentiometer connection terminal 602, the second voltage measurement connection terminal 302, the sixth connection point 206 of the switching handle 2 and the eighth connection point 208 of the switching handle 2.
The ground terminal 7 is provided with an outer terminal 701, a first inner terminal 702, and a second inner terminal 703, the outer terminal 701 is connected to the ground of the external test dc system 8, the first inner terminal 702 is connected to the fifth connection point 205 of the switching handle 2, and the second inner terminal 703 is connected to the seventh connection point 207 of the switching handle 2.
The second connection point 202 and the fourth connection point 204 of the switching handle 2 are connected to the first voltage measurement connection terminal 301, the first potentiometer connection terminal 601, and the second connection terminal 502 of the measurement switch 5 after being interconnected.
The switching handle 2 is provided with three gears, namely a 1-gear working circuit, a 2-gear working circuit and a 0-gear working circuit, wherein the 1-gear working circuit simulates that a direct current system has positive ground faults, specifically a positive electrode contact L+ of an external test direct current system 8, a first wiring terminal 101 of a total free switch 1, a second wiring terminal 102 of the total free switch 1, a first connection point 201 of the switching handle 2, a second connection point 202 of the switching handle 2, a first potentiometer wiring terminal 601, a second potentiometer wiring terminal 602, a sixth connection point 206 of the switching handle 2, a fifth connection point 205 of the switching handle 2, a first inner side terminal 702 of a grounding terminal 7, an outer side terminal 701 of the grounding terminal 7 and a ground wire of the external test direct current system 8 which are sequentially connected in series. At this time, the first voltage measurement terminal 301 of the voltmeter 3 is connected to the first potentiometer terminal 601, and the second voltage measurement terminal 302 of the voltmeter 3 is connected to the second potentiometer terminal 602; i.e. voltmeter 3 is connected in parallel with potentiometer 6.
The 2-gear working circuit simulates a negative ground fault of a direct current system, and specifically comprises a negative electrode contact L-, a third wiring terminal 103 of a total air switch 1, a fourth wiring terminal 104 of the total air switch 1, a third connection point 203 of a switching handle 2, a fourth connection point 204 of the switching handle 2, a first potentiometer wiring terminal 601, a second potentiometer wiring terminal 602, an eighth connection point 208 of the switching handle 2, a seventh connection point 207 of the switching handle 2, a second inner side terminal 703 of a grounding terminal 7, an outer side terminal 701 of the grounding terminal 7 and a ground wire of the external test direct current system 8 which are sequentially connected in series. At this time, the first voltage measurement terminal 301 of the voltmeter 3 is connected to the first potentiometer terminal 601, and the second voltage measurement terminal 302 of the voltmeter 3 is connected to the second potentiometer terminal 602; i.e. voltmeter 3 is connected in parallel with potentiometer 6.
The 0-gear working circuit measures the actual resistance value of the potentiometer, namely the simulated ground resistance value, and specifically comprises a first wiring terminal 401 of an ohmmeter 4, a first wiring terminal 501 of a measuring free switch 5, a second wiring terminal 502 of the measuring free switch 5, a first potentiometer wiring terminal 601, a second potentiometer wiring terminal 602, a fourth wiring terminal 504 of the measuring free switch 5, a third wiring terminal 503 of the measuring free switch 5, and a second wiring terminal 402 of the ohmmeter 4 which are sequentially connected in series, namely the ohmmeter 4 is connected with the potentiometer 6 in parallel.
The working principle of the direct current ground fault simulation box provided by the utility model is as follows:
the positive electrode and the negative electrode of the direct current bus section where the insulation monitoring device to be tested of the external test direct current system 8 is located and the ground are respectively connected with the main air switch 1 and the ground terminal 7 inside the box body, at the moment, the main air switch 1 is in a disconnection state, the initial state of the switching handle 2 is placed in the 0-gear, and the measuring air switch 5 is in the disconnection state. When the positive electrode ground fault simulation is carried out, firstly, the main air switch 1 is closed, the switching handle 2 is placed in 1 gear, the positive electrode of the external test direct current system 8 is controlled to be connected into a fault simulation loop, the resistance value of the potentiometer 6 is regulated, and the resistance value (the initial state is the maximum resistance value) is reduced until the insulation monitoring device gives an alarm, and the regulation is stopped; and (3) placing the switching handle 2 in a 0-grade mode, switching to a measurement mode of simulating the resistance value of the grounding resistor, closing the measurement switch 5, measuring the resistance value simulated to trigger the alarm of the insulation monitoring device through the ohmmeter 4, and checking with the insulation monitoring device to determine whether the device acts correctly or not, wherein the precision meets the requirement or not.
When the negative electrode ground fault simulation is carried out, the measurement air switch 5 is only required to be disconnected, the resistance of the potentiometer 6 is reduced to the maximum resistance value, then the switching handle 2 is switched to 2 gears, and the step of positive electrode ground fault simulation is repeated.
The direct current grounding fault simulation box provided by the utility model is suitable for fault simulation of direct current system configured with an insulation monitoring device for periodic detection, can be directly connected into a bus or a test branch loop of the direct current system to realize simulation of grounding faults of the direct current system, can realize real-time voltage monitoring under the state of grounding faults, and can measure and check the sensitivity of grounding resistors of the insulation monitoring device. The fault simulation box fully considers the protection of preventing the short circuit fault of the direct current system, and prevents the short circuit through the set total open.
The direct-current ground fault simulation box provided by the utility model enables the daily insulation inspection simulation work to be standardized, simplifies the operation, reduces the test wiring times, improves the working efficiency, does not depend on the personal technical level any more, and greatly improves the safety and the convenience.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.
Claims (10)
1. The direct-current ground fault simulation box is characterized by comprising a box body, wherein a main air switch (1), a switching handle (2), a voltmeter (3), an ohmmeter (4), a measuring air switch (5), a potentiometer (6) and a grounding terminal (7) are arranged in the box body,
the power side of the main air switch (1) is connected with the positive electrode contact and the negative electrode contact of an external test direct current system (8), and the load side of the main air switch (1) is connected with the switching handle (2);
8 connecting points are arranged on two sides of the switching handle (2), wherein a first connecting point (201), a third connecting point (203), a fifth connecting point (205) and a seventh connecting point (207) are positioned on the same side, and a second connecting point (202), a fourth connecting point (204), a sixth connecting point (206) and an eighth connecting point (208) are positioned on the same side;
the switching handle (2) is provided with three gears, namely a 1-gear working circuit, a 2-gear working circuit and a 0-gear working circuit, wherein:
the 1-gear working circuit comprises a positive electrode contact, a main air switch (1), a first connecting point (201) of the switching handle (2), a second connecting point (202) of the switching handle (2), a potentiometer (6), a sixth connecting point (206) of the switching handle (2), a fifth connecting point (205) of the switching handle (2), a grounding terminal (7) and a ground wire of the external test direct current system (8) which are sequentially connected in series;
the 2-gear working loop comprises a negative electrode contact, the main air switch (1), a third connection point (203) of the switching handle (2), a fourth connection point (204) of the switching handle (2), the potentiometer (6), an eighth connection point (208) of the switching handle (2), a seventh connection point (207) of the switching handle (2), the grounding terminal (7) and the ground wire which are sequentially connected in series;
the 0-gear working loop comprises the measuring space (5) and the ohm meter (4) and the potentiometer (6) which are respectively connected with the measuring space (5) in parallel.
2. The direct current ground fault simulation box according to claim 1, characterized in that the power supply side of the total air gap (1) is provided with a first terminal (101) and a third terminal (103), and the load side of the total air gap (1) is provided with a second terminal (102) and a fourth terminal (104).
3. The direct current ground fault simulation box according to claim 2, characterized in that the voltmeter (3) is provided with a first voltage measurement terminal (301) and a second voltage measurement terminal (302);
the potentiometer (6) is provided with a first potentiometer connecting terminal (601) and a second potentiometer connecting terminal (602);
the ohmmeter (4) is provided with a first connecting terminal (401) and a second connecting terminal (402).
4. A direct current ground fault simulation box according to claim 3, characterized in that the measurement air switch (5) is provided with four connection terminals, of which a first connection terminal (501) and a third connection terminal (503) are located at the upper end and a second connection terminal (502) and a fourth connection terminal (504) are located at the lower end.
5. The direct current ground fault simulation box according to claim 4, wherein the second connection point (202) of the switching handle (2) and the fourth connection point (204) of the switching handle (2) are connected with the first voltage measurement connection terminal (301), the first potentiometer connection terminal (601) and the second connection terminal (502) of the measurement space (5) respectively after being interconnected.
6. The direct current ground fault simulation box according to claim 5, characterized in that a first connection terminal (401) of the ohmmeter (4) is connected with a first connection terminal (501) of the measurement gap (5), and a second connection terminal (402) of the ohmmeter (4) is connected with a third connection terminal (503) of the measurement gap (5);
the fourth connection terminal (504) of the measurement switch (5) is connected to the second potentiometer connection terminal (602), the second voltage measurement connection terminal (302), the sixth connection point (206) of the switching handle (2) and the eighth connection point (208) of the switching handle (2) respectively.
7. The direct current ground fault simulation box according to claim 6, characterized in that the ground terminal (7) is provided with an outer terminal (701), a first inner terminal (702) and a second inner terminal (703), the outer terminal (701) being connected with the ground wire, the first inner terminal (702) being connected with the fifth connection point (205) of the switching handle (2), the second inner terminal (703) being connected with the seventh connection point (207) of the switching handle (2).
8. The direct current ground fault simulation box according to claim 7, wherein the 1 st gear working loop is the positive electrode contact, the first terminal (101) of the total air switch (1), the second terminal (102) of the total air switch (1), the first connection point (201) of the switching handle (2), the second connection point (202) of the switching handle (2), the first potentiometer connection terminal (601), the second potentiometer connection terminal (602), the sixth connection point (206) of the switching handle (2), the fifth connection point (205) of the switching handle (2), the first inner terminal (702) of the ground terminal (7), the outer terminal (701) of the ground terminal (7), and the ground line which are sequentially connected in series.
9. The direct current ground fault simulation box according to claim 7, wherein the 2-gear working loop is the negative electrode contact, the third terminal (103) of the total air switch (1), the fourth terminal (104) of the total air switch (1), the third connection point (203) of the switching handle (2), the fourth connection point (204) of the switching handle (2), the first potentiometer connection terminal (601), the second potentiometer connection terminal (602), the eighth connection point (208) of the switching handle (2), the seventh connection point (207) of the switching handle (2), the second inner terminal (703) of the ground terminal (7), the outer terminal (701) of the ground terminal (7), and the ground line which are sequentially connected in series.
10. The direct current ground fault simulation box according to claim 7, wherein the 0-gear working circuit is a first wiring terminal (401) of the ohmmeter (4), a first wiring terminal (501) of the measurement free switch (5), a second wiring terminal (502) of the measurement free switch (5), a first potentiometer wiring terminal (601), a second potentiometer wiring terminal (602), a fourth wiring terminal (504) of the measurement free switch (5), a third wiring terminal (503) of the measurement free switch (5) and a second wiring terminal (402) of the ohmmeter (4) which are sequentially connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321523606.4U CN220543096U (en) | 2023-06-14 | 2023-06-14 | DC ground fault simulation box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321523606.4U CN220543096U (en) | 2023-06-14 | 2023-06-14 | DC ground fault simulation box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220543096U true CN220543096U (en) | 2024-02-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321523606.4U Active CN220543096U (en) | 2023-06-14 | 2023-06-14 | DC ground fault simulation box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220543096U (en) |
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2023
- 2023-06-14 CN CN202321523606.4U patent/CN220543096U/en active Active
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