CN219760331U - Three-phase overvoltage protection device of arc extinction cabinet - Google Patents
Three-phase overvoltage protection device of arc extinction cabinet Download PDFInfo
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- CN219760331U CN219760331U CN202321265254.7U CN202321265254U CN219760331U CN 219760331 U CN219760331 U CN 219760331U CN 202321265254 U CN202321265254 U CN 202321265254U CN 219760331 U CN219760331 U CN 219760331U
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- 230000008033 biological extinction Effects 0.000 title claims abstract description 8
- 230000001629 suppression Effects 0.000 claims abstract description 24
- 230000002457 bidirectional effect Effects 0.000 claims description 25
- 239000000779 smoke Substances 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 3
- 230000006978 adaptation Effects 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 2
- 230000001012 protector Effects 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
Abstract
The utility model discloses a three-phase overvoltage protection device of an arc extinction cabinet, which relates to the technical field of arc extinction cabinets. The three-phase overvoltage protection device of the arc suppression cabinet is convenient for installation and fixation of the protection box, reduces voltage and current at an actual fault point, is not easy to form an arc, simultaneously makes fault phase voltage zero and normal phase voltage line voltage, realizes arc suppression and overvoltage limiting functions, prolongs the service life of the arc suppression cabinet, and plays a good role in protection.
Description
Technical Field
The utility model relates to the technical field of arc suppression cabinets, in particular to a three-phase overvoltage protection device of an arc suppression cabinet.
Background
The arc grounding overvoltage is also called intermittent arc grounding overvoltage, and the basis of the arc grounding overvoltage is intermittent arc. When a single-phase intermittent arc grounding (hereinafter referred to as arc grounding) fault occurs in a neutral point indirect grounding system, the electric charge on a grounding capacitor of the system is accumulated and redistributed repeatedly due to repeated continuous extinction and reignition of the arc, high-frequency oscillation overvoltage is caused on an inductance-capacitance loop of a non-fault phase,
the three-phase overvoltage protector is a protection device for protecting the insulation of power equipment from overvoltage, and is mainly used in power grids for generating, supplying power and using electricity, so that more and more arc suppression cabinets are applied to power grid systems.
In the current market, the voltage protection device used by the existing arc suppression cabinet is easy to erode by power pollution harmonic wave, and the partial discharge intensity of the capacitor of the product is increased due to the generation of harmonic wave overvoltage, overcurrent and overload, so that insulation aging is caused, the resistor is abnormally heated, the service life of the protector is shortened, and the protector is inconvenient to install, so that the three-phase overvoltage protection device of the arc suppression cabinet is necessary to be provided.
Disclosure of Invention
The utility model mainly aims to provide a three-phase overvoltage protection device of an arc extinction cabinet, which can effectively solve the problem of xx in the background technology.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: the three-phase overvoltage protection device of the arc extinction cabinet comprises a cabinet body, wherein a supporting plate is fixedly connected between the inner walls of the cabinet body, a control device is fixedly connected to an inner bottom plate of the cabinet body, the top of the supporting plate is connected with a protection box through a fixing component, and a protection component is arranged in the protection box;
the fixing assembly comprises a bidirectional screw rod, a bearing, a moving block, a limiting clamping plate and a transfer wheel, wherein the bidirectional screw rod is movably arranged between the two inner walls of the cabinet body, the two ends of the bidirectional screw rod are respectively connected with the two inner walls of the cabinet body through the bearing, the moving block is sleeved on the outer peripheral surface of the bidirectional screw rod, the top of the moving block is fixedly connected with the bottom end of the limiting clamping plate, and the transfer wheel is sleeved on the outer surface of the shaft center of the bidirectional screw rod;
the protection assembly comprises a three-phase binding post, a single-phase vacuum contactor, a high-voltage current-limiting fuse, a voltage transformer and a high-voltage isolating switch, wherein the three-phase binding post is arranged at the top of the protection box, the single-phase vacuum contactor, the high-voltage current-limiting fuse, the voltage transformer and the high-voltage isolating switch are sequentially arranged in the protection box, and the control device is respectively connected with the single-phase vacuum contactor, the high-voltage current-limiting fuse, the voltage transformer and the high-voltage isolating switch through wires.
Preferably, the outer peripheral surface of the bidirectional screw rod is provided with positive threads and reverse threads in sequence from left to right, the number of the moving blocks is two, and the two moving blocks are in threaded connection with the reverse threads and the bidirectional screw rod respectively through the positive threads.
Preferably, the lateral center of the top of the supporting plate is located at two sides of the protection box and is provided with a sliding groove in a penetrating mode, the limiting clamping plates are movably arranged in the sliding groove and slide in the sliding groove, and the limiting clamping plates are matched with the protection box.
Preferably, the bottom fixedly connected with ground connection terminal of guard box, the inside of ground connection terminal and guard box is connected through the wire, a plurality of through wires hole has been seted up to the rear end face of the cabinet body, the through wires hole is in proper order with three-phase terminal and ground connection terminal one-to-one.
Preferably, a smoke sensor is fixedly connected to an inner wall of the cabinet body, an alarm is fixedly connected to the center of the top of the cabinet body, and the smoke sensor and the alarm are electrically connected with the control device.
Preferably, the on-off of the single-phase vacuum contactor is controlled by a control device arranged in the cabinet body, and the grounding terminal is positioned right below the bottom of the three-phase terminal.
Preferably, the front end face of the cabinet body is hinged with a cabinet door through a hinge, and an observation window is arranged in the center of the front end face of the cabinet door.
Compared with the prior art, the utility model has the following beneficial effects:
in the utility model, through the fixed component and the protection component which are arranged, the protection box is firstly arranged on the supporting plate, then the middle rotating wheel rotates, the middle rotating wheel drives the bidirectional screw rod to rotate between the inner walls of the cabinet body through the bearing, the bidirectional screw rod rotates through the arranged positive threads and the reverse threads to drive the two moving blocks to be close to each other, the two limiting clamping plates are close to each other through the sliding grooves, the two limiting clamping plates are used for fixing the two sides and the upper part of the protection box, the protection box is completely installed, then the wires are sequentially connected through the threading holes, when a single-phase grounding fault occurs in the electric power system, the control device receives the transmission signals of the voltage transformer and the single-phase vacuum contactor, converts all grounding faults into metallic grounding faults to be simply and uniformly treated, the high-voltage isolating switch is used for direct grounding, the device is convenient for the installation and fixation of a protection box, enables the inside of the arc suppression cabinet to have three-phase overvoltage protection, enables the voltage at the actual fault point to be reduced and the current to be reduced, is not easy to form an arc, enables the fault phase voltage to be zero, enables normal phase voltage to be line voltage, achieves arc suppression and overvoltage limiting functions, can detect the inside of the cabinet body in real time through the use of a smoke sensor and an alarm, and enables the protection box to be convenient to install and fix when a problem occurs, enables the voltage at the actual fault point to be reduced and the current to be reduced, enables the fault phase voltage to be zero, enables normal phase voltage to be line voltage, achieves arc suppression and overvoltage limiting functions, prolongs the service life of the arc suppression cabinet, and plays a good role in protection.
Drawings
FIG. 1 is a schematic perspective view of a three-phase overvoltage protection device of an arc suppression cabinet according to the present utility model;
FIG. 2 is a schematic diagram of a three-phase overvoltage protection device of an arc suppression cabinet with a front view and an inner cross section;
FIG. 3 is a schematic diagram of the internal connection structure of a protection box of the three-phase overvoltage protection device of the arc suppression cabinet;
fig. 4 is a schematic perspective view of a supporting plate of a three-phase overvoltage protection device of an arc suppression cabinet according to the present utility model;
fig. 5 is an enlarged schematic view of the structure of the three-phase overvoltage protection device of the arc suppression cabinet in fig. 2 at a position a.
In the figure: 1. a cabinet body; 2. a support plate; 3. a control device; 4. a protection box; 5. a two-way screw rod; 6. a bearing; 7. a moving block; 8. limiting clamping plates; 9. a middle rotating wheel; 10. a sliding groove; 11. a three-phase binding post; 12. a single phase vacuum contactor; 13. a high voltage current limiting fuse; 14. a voltage transformer; 15. a high voltage isolating switch; 16. a grounding binding post; 17. a smoke sensor; 18. an alarm; 19. a threading hole; 20. a cabinet door; 21. and an observation window.
Detailed Description
The utility model is further described in connection with the following detailed description, in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the utility model easy to understand.
In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be configured and operated in the specific direction, 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 relative importance.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "provided," "connected," and the like are to be construed broadly, and may be fixedly connected, detachably connected, or integrally connected, for example; 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.
Referring to fig. 1-5, the utility model discloses a three-phase overvoltage protection device of an arc suppression cabinet, which comprises a cabinet body 1, wherein a supporting plate 2 is fixedly connected between the inner walls of the cabinet body 1, a control device 3 is fixedly connected on an inner bottom plate of the cabinet body 1, the top of the supporting plate 2 is connected with a protection box 4 through a fixing component, and a protection component is arranged in the protection box 4;
the fixing assembly comprises a bidirectional screw rod 5, a bearing 6, a moving block 7, a limiting clamping plate 8 and a transfer wheel 9, wherein the bidirectional screw rod 5 is movably arranged between the two inner walls of the cabinet body 1, the two ends of the bidirectional screw rod 5 are respectively connected with the two inner walls of the cabinet body 1 through the bearing 6, the moving block 7 is sleeved on the outer peripheral surface of the bidirectional screw rod 5, the top of the moving block 7 is fixedly connected with the bottom end of the limiting clamping plate 8, and the transfer wheel 9 is sleeved on the outer surface of the shaft center of the bidirectional screw rod 5;
the protection component comprises a three-phase binding post 11, a single-phase vacuum contactor 12, a high-voltage current-limiting fuse 13, a voltage transformer 14 and a high-voltage isolating switch 15, wherein the three-phase binding post 11 is arranged at the top of the protection box 4, the single-phase vacuum contactor 12, the high-voltage current-limiting fuse 13, the voltage transformer 14 and the high-voltage isolating switch 15 are sequentially arranged in the protection box 4, and the control device 3 is respectively connected with the single-phase vacuum contactor 12, the high-voltage current-limiting fuse 13, the voltage transformer 14 and the high-voltage isolating switch 15 through wires.
The outer peripheral surface of the bidirectional screw rod 5 is sequentially provided with a positive thread and a negative thread from left to right, the number of the moving blocks 7 is two, and the two moving blocks 7 are in threaded connection with the negative thread and the bidirectional screw rod 5 respectively through the positive thread.
The transverse center department in the top of backup pad 2 is located the both sides of guard box 4 and has all run through and have offered sliding tray 10, and spacing splint 8 activity sets up in the inside of sliding tray 10, and slides in the inside of sliding tray 10, spacing splint 8 and guard box 4 looks adaptation.
The bottom fixedly connected with ground connection terminal 16 of guard box 4, ground connection terminal 16 is connected through the wire with the inside of guard box 4, and a plurality of through wires hole 19 have been seted up to the rear end face of cabinet body 1, and through wires hole 19 corresponds with three-phase terminal 11 and ground connection terminal 16 one by one in proper order.
A smoke sensor 17 is fixedly connected to one inner wall of the cabinet body 1, an alarm 18 is fixedly connected to the center of the top of the cabinet body 1, and the smoke sensor 17 and the alarm 18 are electrically connected with the control device 3.
The on and off of the single-phase vacuum contactor 12 is controlled by a control device 3 installed inside the cabinet 1, and the ground terminal 16 is located right under the bottom of the three-phase terminal 11.
The front end face of the cabinet body 1 is hinged with a cabinet door 20 through a hinge, and an observation window 21 is arranged in the center of the front end face of the cabinet door 20.
The working principle of the utility model is as follows: firstly, the protection box 4 is placed on the supporting plate 2, then the middle rotating wheel 9 is rotated, the middle rotating wheel 9 drives the bidirectional screw rod 5 to rotate between the inner walls of the cabinet body 1 through the bearings 6, the bidirectional screw rod 5 rotates through the set positive threads and the set negative threads to drive the two moving blocks 7 to be close to each other, the two moving blocks 7 are close to each other through the sliding grooves 10 to enable the two limiting clamping plates 8 to be close to each other, the two limiting clamping plates 8 are used for fixing the two sides and the upper side of the protection box 4, the protection box 4 is installed, then wires are sequentially connected through the threading holes 19, when a single-phase grounding fault occurs in an electric power system, the control device 3 receives signals transmitted by the voltage transformer 14 and the single-phase vacuum contactor 12, all grounding faults are converted into metallic grounding faults to be processed simply and uniformly, the metallic grounding faults are directly grounded through the high-voltage isolating switch 15, a multipoint grounding circuit is formed with an actual fault point, the zero-sequence loop of the system is changed, voltage at the actual fault point is reduced, the current is not easy to form, meanwhile, the fault phase voltage is zero, the normal phase voltage is line voltage, the realization and the overvoltage limiting function is achieved, and the alarm device 18 can be used for timely alarming the alarm 1 through the smoke detector 18 when the inside the alarm device is used, and the alarm device 18 can be used for timely alarming the alarm 1.
The foregoing has shown and described the basic principles and main features of the present utility model and the advantages of the present utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (7)
1. The utility model provides a three-phase overvoltage protection device of arc extinction cabinet which characterized in that: the novel intelligent cabinet temperature control device comprises a cabinet body (1), wherein a supporting plate (2) is fixedly connected between the inner walls of the cabinet body (1), a control device (3) is fixedly connected to the inner bottom plate of the cabinet body (1), a protection box (4) is connected to the top of the supporting plate (2) through a fixing component, and a protection component is arranged in the protection box (4);
the fixing assembly comprises a bidirectional screw rod (5), a bearing (6), a moving block (7), a limiting clamping plate (8) and a transfer wheel (9), wherein the bidirectional screw rod (5) is movably arranged between the two inner walls of the cabinet body (1), the two ends of the bidirectional screw rod (5) are respectively connected with the two inner walls of the cabinet body (1) through the bearing (6), the moving block (7) is sleeved on the outer peripheral surface of the bidirectional screw rod (5), the top of the moving block (7) is fixedly connected with the bottom end of the limiting clamping plate (8), and the transfer wheel (9) is sleeved on the outer surface of the shaft center of the bidirectional screw rod (5);
the protection assembly comprises a three-phase binding post (11), a single-phase vacuum contactor (12), a high-voltage current-limiting fuse (13), a voltage transformer (14) and a high-voltage isolating switch (15), wherein the three-phase binding post (11) is arranged at the top of the protection box (4), the single-phase vacuum contactor (12), the high-voltage current-limiting fuse (13), the voltage transformer (14) and the high-voltage isolating switch (15) are sequentially arranged in the protection box (4), and the control device (3) is respectively connected with the single-phase vacuum contactor (12), the high-voltage current-limiting fuse (13), the voltage transformer (14) and the high-voltage isolating switch (15) through leads.
2. The three-phase overvoltage protection device of an arc suppression cabinet according to claim 1, wherein: the outer peripheral surface of the bidirectional screw rod (5) is sequentially provided with positive threads and reverse threads from left to right, the number of the moving blocks (7) is two, and the two moving blocks (7) are in threaded connection with the reverse threads and the bidirectional screw rod (5) through the positive threads respectively.
3. The three-phase overvoltage protection device of an arc suppression cabinet according to claim 2, wherein: the lateral center department in the top of backup pad (2) is located the both sides of guard box (4) and has all run through and seted up sliding tray (10), spacing splint (8) activity sets up in the inside of sliding tray (10), and slides in the inside of sliding tray (10), spacing splint (8) and guard box (4) looks adaptation.
4. A three-phase overvoltage protection device for an arc suppression cabinet according to claim 3, wherein: the bottom fixedly connected with ground connection terminal (16) of guard box (4), ground connection terminal (16) are connected through the wire with the inside of guard box (4), a plurality of through wires hole (19) have been seted up to the rear end face of cabinet body (1), through wires hole (19) are in proper order with three-phase terminal (11) and ground connection terminal (16) one-to-one.
5. The three-phase overvoltage protection device of an arc suppression cabinet according to claim 4, wherein: the intelligent cabinet is characterized in that a smoke sensor (17) is fixedly connected to one inner wall of the cabinet body (1), an alarm (18) is fixedly connected to the center of the top of the cabinet body (1), and the smoke sensor (17) and the alarm (18) are electrically connected with the control device (3).
6. The three-phase overvoltage protection device of an arc suppression cabinet according to claim 5, wherein: the connection and disconnection of the single-phase vacuum contactor (12) are controlled by a control device (3) arranged in the cabinet body (1), and the grounding binding post (16) is positioned right below the bottom of the three-phase binding post (11).
7. The three-phase overvoltage protection device of an arc suppression cabinet according to claim 6, wherein: the front end face of the cabinet body (1) is hinged with a cabinet door (20) through a hinge, and an observation window (21) is arranged in the center of the front end face of the cabinet door (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321265254.7U CN219760331U (en) | 2023-05-24 | 2023-05-24 | Three-phase overvoltage protection device of arc extinction cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321265254.7U CN219760331U (en) | 2023-05-24 | 2023-05-24 | Three-phase overvoltage protection device of arc extinction cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219760331U true CN219760331U (en) | 2023-09-26 |
Family
ID=88076662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321265254.7U Active CN219760331U (en) | 2023-05-24 | 2023-05-24 | Three-phase overvoltage protection device of arc extinction cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219760331U (en) |
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2023
- 2023-05-24 CN CN202321265254.7U patent/CN219760331U/en active Active
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