Insulation remote measurement auxiliary instrument for three-phase bus

Abstract

The utility model discloses an insulation remote measurement auxiliary instrument for a three-phase bus, which comprises an insulation shell, any surface of the insulation shell is provided with an installation panel, one side of the installation panel is sequentially provided with an A-phase binding post, a B-phase binding post and a C-phase binding post, one side close to the C-phase binding post is provided with a grounding binding post, and the other side close to the C-phase binding post is provided with a grounding wire. A first binding post and a second binding post are installed on the other side of the insulation shell installation panel, a first universal change-over switch and a second universal change-over switch are installed in the middle of the insulation shell installation panel, and a discharge button is installed on the side close to the first universal change-over switch. And a plurality of conductive contacts are arranged in the first universal change-over switch and the second universal change-over switch. The insulation shaking test auxiliary instrument for the three-phase bus solves the problem that manual multiple phase change is needed in the shaking test insulation process of the three-phase bus in the prior art.

Description

Technical Field

[0001] The utility model belongs to the technical field of switching operation equipment of a power system, and particularly relates to an insulation shaking test auxiliary instrument for a three-phase busbar. Background Art

[0002] During power system switching operations, the three-phase busbars must be tested for insulation before power is restored. The insulation resistance between phases and to ground is used to determine whether they are short-circuited or grounded. To test the insulation between phases and to ground, a hand-cranked megohmmeter is used, with the two wires connected to the L and E terminals, respectively. To test the insulation between phases, the other ends of the two wires are connected to two phases of the three-phase busbar (repeated three times, such as AB, BC, AC). To test the insulation to ground, one wire is connected to each busbar (AB, C) and the other to the ground. Finally, the three-phase busbars must be discharged individually: one end of a wire is grounded, and the other end is touched to each of the three phases of the busbar until the busbars are no longer charged. This process requires manual connection of the two wires to the three-phase busbar with wire clamps, followed by discharge. To test the insulation to ground, the three-phase busbars are then connected to the ground terminal again, and the discharge is repeated after the test is complete. This process is tedious and repetitive.

[0003] When daily workers perform switching operations to shake the busbar for insulation, the on-site busbar layout is relatively complicated, and they face the following situations: 1. The busbar is located at a high position, and the workers need to climb up to clamp the test line to the phase line of the busbar. After shaking the insulation, the workers remove the wire clamp and then install it on the other two phases. This multiple back and forth operation increases the danger of the operation; 2. The busbar is in a small space, and the workers are likely to touch the busbar that has not yet discharged when shaking the insulation to change phases, causing harm to personnel. Utility Model Content

[0004] The utility model aims to provide an insulation shaking test auxiliary instrument for a three-phase bus, which solves the problem that multiple manual phase changes are required during the existing insulation shaking test of the three-phase bus.

[0005] The technical solution adopted by the present invention is an insulation shaking test auxiliary instrument for a three-phase busbar, comprising an insulating shell, a mounting panel being provided on any surface of the insulating shell, an A-phase terminal, a B-phase terminal, and a C-phase terminal being installed in sequence on one side of the mounting panel, a grounding terminal being installed on the side close to the C-phase terminal, a first terminal and a second terminal being installed on the other side of the insulating shell mounting panel, a first universal transfer switch and a second universal transfer switch being installed in the middle of the insulating shell mounting panel, a discharge button being installed on the side close to the first universal transfer switch, and a plurality of conductive contacts being provided inside the first universal transfer switch and the second universal transfer switch.

[0006] The utility model is also characterized in that:

[0007] The conductive contacts of the first universal transfer switch include a first contact, a second contact, a third contact, a fourth contact, a fifth contact, a sixth contact, a seventh contact, an eighth contact, a ninth contact and a tenth contact, and the conductive contacts of the second universal transfer switch include an eleventh contact, a twelfth contact, a thirteenth contact and a fourteenth contact.

[0008] The C-phase terminal, the first contact and the third contact are electrically connected within the device through a wire; the B-phase terminal, the fifth contact and the seventh contact are electrically connected within the device through a wire; and the A-phase terminal and the ninth contact are electrically connected within the device through a wire.

[0009] The first terminal, the second contact, the sixth contact and the tenth contact are electrically connected in the device through a wire, and the first terminal, the second contact, the sixth contact and the tenth contact are connected to the ground terminal through the normally open end of the discharge button.

[0010] The fourth contact, the eighth contact and the eleventh contact are electrically connected in the device through wires.

[0011] The ground terminal and the thirteenth contact are electrically connected in the device through a wire.

[0012] The second terminal, the twelfth contact and the fourteenth contact are electrically connected in the device through a wire.

[0013] The beneficial effects of the utility model are:

[0014] The utility model provides an insulation shaking test auxiliary instrument for three-phase busbars, which realizes multiple phase changes during the shaking test insulation process through the first universal conversion switch and the second universal conversion switch, and adds a discharge function, thereby solving the problem of multiple manual phase changes required during the shaking test insulation process of the existing three-phase busbars, reducing the operating tasks of the operators, and concentrating the phase change process on the insulation shaking test auxiliary instrument for the three-phase busbars, making the phase change more convenient and quick, and the risk is relatively reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the insulation shaking test auxiliary instrument for three-phase busbars of the utility model;

[0016] Figure 2 This is the circuit diagram of the internal components of this utility model.

[0017] In the figure: 1. First contact; 2. Second contact; 3. Third contact; 4. Fourth contact; 5. Fifth contact; 6. Sixth contact; 7. Seventh contact; 8. Eighth contact; 9. Ninth contact; 10. Tenth contact; 11. Eleventh contact; 12. Twelfth contact; 13. Thirteenth contact; 14. Fourteenth contact; 15. Insulating housing; 16. A-phase terminal; 17. B-phase terminal; 18. C-phase terminal; 19. Grounding terminal; 20. First terminal; 21. Second terminal; 22. Discharge button; 23. First universal transfer switch; 24. Second universal transfer switch. DETAILED DESCRIPTION

[0018] The present invention will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0019] Auxiliary instrument for insulation testing of three-phase busbars, such as Figure 1 As shown, it includes an insulating shell 15, and a mounting panel is provided on any surface of the insulating shell 15. A phase A terminal 16, a phase B terminal 17, and a phase C terminal 18 are installed in sequence on one side of the mounting panel. A grounding terminal 19 is installed on the side close to the phase C terminal 18. A first terminal 20 and a second terminal 21 are installed on the other side of the mounting panel of the insulating shell 15. A first universal transfer switch 23 and a second universal transfer switch 24 are installed in the middle of the mounting panel of the insulating shell 15. The first universal transfer switch 23 has seven gears and adopts the LW28-20 YH5 / 3 model. The second universal transfer switch 24 has three gears and adopts the LW26-20 model. A discharge button 22 is installed on the side close to the first universal transfer switch 23. A plurality of conductive contacts are provided inside the first universal transfer switch 23 and the second universal transfer switch 24.

[0020] like Figure 2 As shown, the conductive contacts of the first universal transfer switch 23 include a first contact 1, a second contact 2, a third contact 3, a fourth contact 4, a fifth contact 5, a sixth contact 6, a seventh contact 7, an eighth contact 8, a ninth contact 9 and a tenth contact 10, and the conductive contacts of the second universal transfer switch 24 include an eleventh contact 11, a twelfth contact 12, a thirteenth contact 13 and a fourteenth contact 14.

[0021] The C-phase terminal 18, the first contact 1 and the third contact 3 are electrically connected within the device through a wire; the B-phase terminal 17, the fifth contact 5 and the seventh contact 7 are electrically connected within the device through a wire; the A-phase terminal 16 and the ninth contact 9 are electrically connected within the device through a wire.

[0022] The first terminal 20, the second contact 2, the sixth contact 6, and the tenth contact 10 are electrically connected within the device via wires. The first terminal 20, the second contact 2, the sixth contact 6, and the tenth contact 10 are connected to the ground terminal 19 via the normally open terminal of the discharge button 22. The fourth contact 4, the eighth contact 8, and the eleventh contact 11 are electrically connected within the device via wires. The ground terminal 19 and the thirteenth contact 13 are electrically connected within the device via wires. The second terminal 21, the twelfth contact 12, and the fourteenth contact 14 are electrically connected within the device via wires.

[0023] The utility model provides an insulation shaking test auxiliary instrument for a three-phase busbar, and its working principle is as follows: when shaking the insulation of the three-phase busbar, the A-phase terminal 16, the B-phase terminal 17, and the C-phase terminal 18 are respectively connected to the A-phase, B-phase, and C-phase of the busbar with test lines, the grounding terminal 19 is connected to the grounding wire bus, and the first terminal 20 and the second terminal 21 are respectively connected to the L end and the E end of the hand-cranked megohmmeter.

[0024] like Figure 2 As shown, turn the second universal transfer switch 24 45 degrees to the interphase position, and the eleventh contact 11 and the twelfth contact 12 are connected. At this time, turn the first universal transfer switch 23 45 degrees to the AB position, and the seventh contact 7 and the eighth contact 8 are connected, and the ninth contact 9 and the tenth contact 10 are connected. The first terminal 20 and the second terminal 21 are connected to the A and B phases of the busbar respectively. At this time, the insulation resistance of the A and B phases can be tested by shaking the megohmmeter; turn the first universal transfer switch 23 90 degrees to the left, and the first contact 23 is turned to the AB position. Connect point 1 to the second contact 2, the seventh contact 7 to the eighth contact 8, and the first terminal 20 and the second terminal 21 to the busbar phases C and B, respectively. At this point, shake the megohmmeter to test the insulation resistance of phases CB. Turn the first universal transfer switch 23 to the left 135 degrees, connect the third contact 3 to the fourth contact 4, and the ninth contact 4 to the tenth contact. Connect the first terminal 20 and the second terminal 21 to the busbar phases A and C, respectively. At this point, shake the megohmmeter to test the insulation resistance of phases AC. Through these operations, the interphase insulation resistance test of the three-phase busbar is completed.

[0025] Turn the second universal transfer switch 24 45° to the right to the ground position, the thirteenth contact 13 and the fourteenth contact 14 are connected, and the E end of the hand-cranked megohmmeter is connected to the ground wire row through the test line. At this time, turn the first universal transfer switch 23 45° to the right to the A phase position, the ninth contact 9 and the tenth contact 10 are connected, and the first terminal 20 is connected to the bus phase A. At this time, shaking the megohmmeter can test the insulation resistance of the A phase bus to the ground; turn the first universal transfer switch 23 90° to the right to the B phase position, the fifth contact 5 and the sixth contact 6 are connected, and the first terminal 20 is connected to the bus phase B. At this time, shaking the megohmmeter can test the insulation resistance of the B phase bus to the ground; turn the first universal transfer switch 23 135° to the right to the C phase position, the first contact 1 and the second contact 2 are connected, and the first terminal 20 is connected to the bus phase C. At this time, shaking the megohmmeter can test the insulation resistance of the C phase bus to the ground. Through the above operations, the insulation resistance test of each phase of the three-phase busbar to ground is completed.

[0026] The second contact 2, the sixth contact 6 and the tenth contact 10 are connected to the ground wire through the normally open end of the discharge button 22. Turn the first universal transfer switch 23 45° to the right to the A phase position, and the ninth contact 9 and the tenth contact 10 are connected. At this time, press the discharge button 22, and the busbar A phase is connected to the ground wire row, and the A phase busbar is discharged; turn the first universal transfer switch 23 90° to the right to the B phase position, and the fifth contact 5 and the sixth contact 6 are connected. At this time, press the discharge button 22, and the busbar B phase is connected to the ground wire row, and the B phase busbar is discharged; turn the first universal transfer switch 23 135° to the right to the C phase position, and the first contact 1 and the second contact 2 are connected. At this time, press the discharge button 22, and the busbar C phase is connected to the ground wire row, and the C phase busbar is discharged. The three-phase busbars are discharged respectively through the above operations.

[0027] Example 1

[0028] The insulation shaking test auxiliary instrument for three-phase busbar provided in this embodiment is as follows: Figure 1 As shown, it includes an insulating shell 15, and a mounting panel is provided on any surface of the insulating shell 15. A phase A terminal 16, a phase B terminal 17, and a phase C terminal 18 are installed in sequence on one side of the mounting panel, and a grounding terminal 19 is installed on the side close to the phase C terminal 18. A first terminal 20 and a second terminal 21 are installed on the other side of the mounting panel of the insulating shell 15. A first universal transfer switch 23 and a second universal transfer switch 24 are installed in the middle of the mounting panel of the insulating shell 15, and a discharge button 22 is installed on the side close to the first universal transfer switch 23. A plurality of conductive contacts are provided inside the first universal transfer switch 23 and the second universal transfer switch 24.

[0029] Example 2

[0030] The insulation shaking test auxiliary instrument for three-phase busbar provided in this embodiment is as follows: Figure 1As shown, it includes an insulating shell 15, and a mounting panel is provided on any surface of the insulating shell 15. A phase A terminal 16, a phase B terminal 17, and a phase C terminal 18 are installed in sequence on one side of the mounting panel, and a grounding terminal 19 is installed on the side close to the phase C terminal 18. A first terminal 20 and a second terminal 21 are installed on the other side of the mounting panel of the insulating shell 15. A first universal transfer switch 23 and a second universal transfer switch 24 are installed in the middle of the mounting panel of the insulating shell 15, and a discharge button 22 is installed on the side close to the first universal transfer switch 23. A plurality of conductive contacts are provided inside the first universal transfer switch 23 and the second universal transfer switch 24.

[0031] like Figure 2 As shown, the conductive contacts of the first universal transfer switch 23 include a first contact 1, a second contact 2, a third contact 3, a fourth contact 4, a fifth contact 5, a sixth contact 6, a seventh contact 7, an eighth contact 8, a ninth contact 9 and a tenth contact 10, and the conductive contacts of the second universal transfer switch 24 include an eleventh contact 11, a twelfth contact 12, a thirteenth contact 13 and a fourteenth contact 14.

[0032] Example 3

[0033] The insulation shaking test auxiliary instrument for three-phase busbar provided in this embodiment is as follows: Figure 1 As shown, it includes an insulating shell 15, and a mounting panel is provided on any surface of the insulating shell 15. A phase A terminal 16, a phase B terminal 17, and a phase C terminal 18 are installed in sequence on one side of the mounting panel, and a grounding terminal 19 is installed on the side close to the phase C terminal 18. A first terminal 20 and a second terminal 21 are installed on the other side of the mounting panel of the insulating shell 15. A first universal transfer switch 23 and a second universal transfer switch 24 are installed in the middle of the mounting panel of the insulating shell 15, and a discharge button 22 is installed on the side close to the first universal transfer switch 23. A plurality of conductive contacts are provided inside the first universal transfer switch 23 and the second universal transfer switch 24.

[0034] like Figure 2 As shown, the conductive contacts of the first universal transfer switch 23 include a first contact 1, a second contact 2, a third contact 3, a fourth contact 4, a fifth contact 5, a sixth contact 6, a seventh contact 7, an eighth contact 8, a ninth contact 9 and a tenth contact 10, and the conductive contacts of the second universal transfer switch 24 include an eleventh contact 11, a twelfth contact 12, a thirteenth contact 13 and a fourteenth contact 14.

[0035] The C-phase terminal 18, the first contact 1 and the third contact 3 are electrically connected within the device through a wire; the B-phase terminal 17, the fifth contact 5 and the seventh contact 7 are electrically connected within the device through a wire; the A-phase terminal 16 and the ninth contact 9 are electrically connected within the device through a wire.

[0036] The first terminal 20, the second contact 2, the sixth contact 6, and the tenth contact 10 are electrically connected within the device via wires. The first terminal 20, the second contact 2, the sixth contact 6, and the tenth contact 10 are connected to the ground terminal 19 via the normally open terminal of the discharge button 22. The fourth contact 4, the eighth contact 8, and the eleventh contact 11 are electrically connected within the device via wires. The ground terminal 19 and the thirteenth contact 13 are electrically connected within the device via wires. The second terminal 21, the twelfth contact 12, and the fourteenth contact 14 are electrically connected within the device via wires.

Claims

1. The insulation test auxiliary instrument for three-phase busbar is characterized by: The invention comprises an insulating shell (15), wherein any surface of the insulating shell (15) is provided with a mounting panel, wherein an A-phase terminal (16), a B-phase terminal (17), and a C-phase terminal (18) are sequentially mounted on one side of the mounting panel, and a grounding terminal (19) is mounted on a side close to the C-phase terminal (18). A first terminal (20) and a second terminal (21) are mounted on the other side of the mounting panel of the insulating shell (15), a first universal transfer switch (23) and a second universal transfer switch (24) are mounted in the middle of the mounting panel of the insulating shell (15), and a discharge button (22) is mounted on a side close to the first universal transfer switch (23). A plurality of conductive contacts are disposed inside the first universal transfer switch (23) and the second universal transfer switch (24).

2. The insulation shaking test auxiliary instrument for three-phase busbar according to claim 1 is characterized in that: The conductive contacts of the first universal transfer switch (23) include a first contact (1), a second contact (2), a third contact (3), a fourth contact (4), a fifth contact (5), a sixth contact (6), a seventh contact (7), an eighth contact (8), a ninth contact (9) and a tenth contact (10); and the conductive contacts of the second universal transfer switch (24) include an eleventh contact (11), a twelfth contact (12), a thirteenth contact (13) and a fourteenth contact (14).

3. The insulation shaking test auxiliary instrument for three-phase busbar according to claim 2 is characterized in that: The C-phase terminal (18), the first contact (1) and the third contact (3) are electrically connected within the device via a wire; the B-phase terminal (17), the fifth contact (5) and the seventh contact (7) are electrically connected within the device via a wire; and the A-phase terminal (16) and the ninth contact (9) are electrically connected within the device via a wire.

4. The insulation shaking test auxiliary instrument for three-phase busbar according to claim 2 is characterized in that: The first terminal (20), the second contact (2), the sixth contact (6) and the tenth contact (10) are electrically connected in the device through a wire, and the first terminal (20), the second contact (2), the sixth contact (6) and the tenth contact (10) are connected to the ground terminal (19) through the normally open end of the discharge button (22).

5. The insulation shaking test auxiliary instrument for three-phase busbar according to claim 2 is characterized in that: The fourth contact (4), the eighth contact (8) and the eleventh contact (11) are electrically connected in the device via wires.

6. The insulation shaking test auxiliary instrument for three-phase busbar according to claim 2, characterized in that: The grounding terminal (19) and the thirteenth contact (13) are electrically connected in the device via a wire.

7. The insulation shaking test auxiliary instrument for three-phase busbar according to claim 2, characterized in that: The second terminal (21), the twelfth contact (12) and the fourteenth contact (14) are electrically connected in the device via a wire.

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