CN219018138U - Grounding arc suppression coil parallel connection small-resistance grounding complete device - Google Patents
Grounding arc suppression coil parallel connection small-resistance grounding complete device Download PDFInfo
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- CN219018138U CN219018138U CN202222776819.XU CN202222776819U CN219018138U CN 219018138 U CN219018138 U CN 219018138U CN 202222776819 U CN202222776819 U CN 202222776819U CN 219018138 U CN219018138 U CN 219018138U
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Abstract
The utility model belongs to the technical field of neutral point grounding devices of distribution networks, and particularly relates to a grounding switching arc suppression coil parallel connection small-resistance grounding complete device. The grounding transformer of the complete device is connected with an arc suppression coil and a grounding resistor which are arranged in parallel, the arc suppression coil and the grounding resistor are independently controlled by a controller, when a single-phase grounding fault occurs in a circuit system, the arc suppression coil starts compensation, if the fault does not disappear after a set time, the arc suppression coil is immediately thrown into the grounding resistor to cut out, if a fault line is cut off, the arc suppression coil is reset and then exits from the grounding resistor, if the fault line is not cut off, the arc suppression coil is reset and then exits from the grounding resistor and the power system operates with the fault. The grounding resistor and the arc suppression coil are connected in parallel, so that the instantaneous grounding fault and the permanent grounding fault in the circuit can be eliminated, the arc suppression coil is cut off after the grounding resistor is connected into the circuit, the arc suppression coil is connected before the grounding resistor is withdrawn, the mutual interference between the grounding resistor and the arc suppression coil during the working is avoided, and the whole circuit system is always in a grounding protection state.
Description
Technical Field
The utility model belongs to the technical field of neutral point grounding devices of distribution networks, and particularly relates to a grounding switching arc suppression coil parallel connection small-resistance grounding complete device.
Background
The selection of the neutral point grounding mode of the power distribution network is closely related to the operation reliability of the power system and the operation economy of the power system, and is an important problem in the construction of urban and rural networks. The selection of the neutral point grounding mode of the power distribution network is not only considering the structure and equipment of the power distribution network at the time, but also is limited by the technical level of grounding equipment at the time. The neutral grounding mode of the current distribution network mainly comprises the steps of non-grounding of a neutral point, grounding of the neutral point through an arc suppression coil, grounding of the neutral point through a small resistor and the like.
The neutral point can automatically eliminate transient single-phase earth faults through the grounding mode of the arc suppression coil, has the advantages of reducing tripping times and reducing earth fault current, but can not cut off non-transient single-phase earth faults, if faults occur in a power distribution system, the whole power distribution system can bear power frequency overvoltage for a long time, the time of the power distribution system bearing the overvoltage can be even as long as two hours, the power distribution system has higher insulation requirements on power distribution system equipment, and the power distribution system bears the overvoltage for a long time, can have adverse effects on numerous electrical equipment with precise structures, and even threatens the personal safety of related staff in serious cases; in addition, the difficulty of fault line selection technology in the traditional arc suppression coil grounding system is high, so that the actual line selection accuracy of the distribution network is low for many years, the grounding fault is found and removed by using a manual path pulling method, the time and the labor are consumed, the efficiency is extremely low, and the safety of operators and electrical equipment in the system can be influenced by errors of manual operation. The neutral point trips when any single-phase earth fault in the system in a mode of grounding through a small resistor, so that the problem that long-time power frequency overvoltage occurs in the power distribution system can be avoided, the requirement on equipment insulation is relatively low, but the tripping rate is too high, and the power supply reliability can be reduced.
The Chinese patent with the authority of CN109449912B and the authority of 2022, 3 and 4 discloses a neutral grounding device and a control method thereof. The neutral point grounding device comprises an arc suppression coil and a resistance unit, wherein the resistance unit is connected with the arc suppression coil in parallel, the resistance value of the resistance unit is adjustable, when a single-phase grounding fault occurs, the arc suppression coil works to compensate capacitance current first, transient circuit faults can be eliminated at the moment, but if the circuit faults still exist, the resistance is put into after a few seconds, so that a fault line is cut off, the problem of overhigh tripping rate is avoided while the whole circuit system is protected, and the reliability of power supply is improved.
In the prior art, when the setting of the neutral point grounding device for connecting the arc suppression coil and the small resistor in parallel is carried out, a cabinet body for placing the low resistor and a cabinet body for placing the arc suppression coil are required to be independently arranged, then the low-resistor cabinet and the arc suppression coil cabinet are connected in parallel to be arranged on the neutral point of the circuit, when the neutral point grounding is completed, the occupied area is large, in addition, accessories such as an isolating switch and a lightning arrester are required to be independently arranged on different cabinet bodies, the field installation and arrangement process of each device is complex, the whole connection circuit is complex, and the whole cost of the device is higher.
Disclosure of Invention
The utility model aims to provide a grounding arc suppression coil parallel connection small-resistance grounding complete device, which solves the technical problems of complex field installation process and high cost of the arc suppression coil parallel connection small-resistance complete device in the prior art.
In order to achieve the purpose, the technical scheme of the grounding arc suppression coil parallel connection small-resistance grounding complete device provided by the utility model is as follows: the grounding complete device is internally and parallelly connected with an arc suppression coil and a grounding resistor, and comprises a grounding transformer cabinet internally provided with a grounding transformer, wherein the arc suppression coil cabinet is arranged on one side of the grounding transformer cabinet, the grounding resistor cabinet is arranged on the other side of the grounding transformer cabinet, the arc suppression coil is arranged in the arc suppression coil cabinet, the grounding resistor is arranged in the grounding resistor cabinet, and the arc suppression coil and the grounding resistor are connected on the grounding transformer in parallel.
The beneficial effects are that: the whole grounding complete equipment is arranged into the combined cabinet body, the circuit connection and the arrangement of the combined cabinet body can be completed before leaving the factory, the whole installation of the grounding complete equipment on site is facilitated, the arc suppression coil cabinet and the grounding resistor cabinet are respectively arranged on two sides of the grounding transformer cabinet, and when the arc suppression coil and the grounding resistor are connected to the grounding transformer in parallel, the length of a connecting copper bar and a connecting cable can be shortened, so that the reduction of the whole cost is facilitated.
Further, a voltage transformer is further arranged in the arc suppression coil cabinet, the voltage transformer is connected with the arc suppression coil and the grounding resistor in parallel, and the voltage transformer is supported on the lower side of the connecting row in the arc suppression coil cabinet.
The beneficial effects are that: set up voltage transformer and play the guard action to whole circuit to with voltage transformer setting up the connection row downside in the arc suppression coil cabinet, thereby support the longer connection row of the internal portion length of arc suppression coil cabinet, need not set up dedicated bearing structure alone in the connection copper bar downside, saved the cost of ground connection integrated equipment and guaranteed the stability of circuit connection simultaneously, effectively utilized the limited space in the arc suppression coil cabinet, reduced whole ground connection integrated equipment area.
Further, the arc suppression coil and the grounding resistor are connected in parallel on the grounding transformer through the isolating switch, the incoming line end of the isolating switch is connected with the lightning arrester, the lightning arrester and the isolating switch are both arranged in the grounding transformer cabinet, the isolating switch is arranged on the front side or the rear side of the grounding transformer, and the isolating switch and the lightning arrester are arranged on the same side of the grounding transformer cabinet in the left-right direction.
The beneficial effects are that: the isolating switch is arranged to control the on-off of the arc suppression coil and the grounding transformer parallel circuit, the isolating switch is cut off to ensure the safety of operators when the device is installed and overhauled, the lightning arrester is arranged to cope with extreme weather, the normal operation of the device is ensured, the circuit structure setting can be optimized by arranging the isolating switch and the position design of the lightning arrester in the grounding transformer cabinet, the length of a cable connected with a copper plate is reduced, the space inside the grounding transformer cabinet is effectively utilized, and the occupied area of the whole neutral point grounding complete device is reduced.
Further, an arc suppression coil branch switch for controlling the on-off of a branch where the arc suppression coil is located is arranged in the arc suppression coil cabinet, the arc suppression coil branch switch is arranged on the same side of the isolating switch in the front-back direction in the arc suppression coil cabinet, and the arc suppression coil is arranged on the other side of the arc suppression coil cabinet in the front-back direction.
The beneficial effects are that: the arc suppression coil branch switch is arranged to control the on-off of the arc suppression coil independently, and the arc suppression coil branch switch and the position of the arc suppression coil in the arc suppression coil cabinet are arranged, so that the connection copper bar and the cable length are reduced, the device cost is reduced, the limited space in the arc suppression coil cabinet is effectively utilized, and the occupied area of the whole device is reduced.
Further, the arc suppression coil is grounded through a damping box, the damping box is arranged in the arc suppression coil cabinet, and the damping box and the arc suppression coil are arranged up and down.
The beneficial effects are that: the damping box is arranged to protect the circuit, the damping box and the arc suppression coil are arranged up and down, so that the length of the connecting copper bar and the length of the cable are reduced, meanwhile, the space in the height direction in the arc suppression coil cabinet is utilized, and the overall size of the device is effectively reduced.
Further, the voltage transformer is connected in parallel to the grounding transformer through the isolating switch, the voltage transformer is supported on the lower side of a connection copper bar of the arc suppression coil branch switch leading to the arc suppression coil, and the damping box is positioned above the arc suppression coil.
The beneficial effects are that: the arc suppression coil and the arc suppression coil branch switch are respectively placed on the front side and the rear side in the arc suppression coil cabinet, the distance is far, the voltage transformer is placed on the lower side of the connection row between the arc suppression coil and the arc suppression coil branch switch, the connection row is supported, connection stability of the connection row is ensured, the damping box is placed above the arc suppression coil, the internal space of the arc suppression coil cabinet is reasonably utilized, and interference among components is avoided.
Further, a ground resistance branch switch used for controlling the on-off of a branch where the ground resistance is located is arranged in the ground resistance cabinet, the ground resistance branch switch is connected to the wire outlet end of the isolating switch through a wall bushing, and the ground resistance branch switch and the isolating switch are arranged on the same side in the front-back direction and close to the ground transformer cabinet in the left-right direction.
The beneficial effects are that: through the rational arrangement of each part position inside the grounding resistance cabinet to guarantee that connecting line is shortest between the part, reduce and connect copper bar and cable quantity, reduce grounding integrated equipment's cost, reduce occupation of land space simultaneously.
Further, the grounding resistor is grounded through a current transformer, and the current transformer is arranged on one side, far away from the grounding transformer cabinet, in the grounding resistor cabinet and on the opposite side of the grounding resistor in the front-rear direction.
The beneficial effects are that: the current transformer can protect the circuit, so that the running stability of the circuit is improved, and through reasonable arrangement of the positions of all parts in the grounding resistor cabinet, the shortest connecting line among the parts is ensured, the consumption of connecting copper bars and cables is reduced, the cost of the grounding complete device is reduced, and meanwhile, the occupied space is reduced.
Further, the grounding transformer cabinet, the arc suppression coil cabinet and the grounding resistor cabinet are arranged in a split mode, and are assembled into a combined cabinet during use.
The beneficial effects are that: the whole grounding complete device is of a split type combined structure, when in transportation and assembly, the size requirement on a transportation vehicle transformer substation door is reduced, transportation can be more conveniently carried out, and meanwhile, the split type combined structure is convenient for on-site transportation and hoisting work.
Further, the cabinet body base and the frame of the grounding transformer cabinet, the arc suppression coil cabinet and the grounding resistor cabinet all adopt channel steel structures, the base is fixedly connected with the frame, and the grounding transformer cabinet, the arc suppression coil cabinet and the grounding resistor cabinet are connected through threaded fasteners.
The beneficial effects are that: the combined cabinet has the advantages that the combined cabinet can be stably connected between the cabinet bodies of the combined cabinet in a split mode through the channel steel structure and the bolt locking mode, so that the problem of gaps between the cabinet bodies after the combined cabinet is avoided, or the circuit connection between the cabinet bodies is influenced due to uneven bottom surfaces.
Drawings
FIG. 1 is a schematic view showing the arrangement of the arc suppression coil parallel resistor in the grounding kit according to the embodiment 1 of the present utility model;
FIG. 2 is a schematic diagram showing the arrangement of a controller in the grounding kit of the parallel resistor of the arc suppression coil in embodiment 1 of the present utility model;
FIG. 3 is a schematic diagram of the system wiring of the grounding kit of the parallel resistor of the arc suppression coil in embodiment 1 of the present utility model;
FIG. 4 is a basic operation timing chart of the grounding complete device of the arc suppression coil parallel resistor in the embodiment 1 of the utility model when a single-phase fault occurs in a circuit system;
reference numerals illustrate:
1. a combined cabinet body; 2. a grounded transformer cabinet; 21. a grounding transformer; 22. an isolating switch; 23. a lightning arrester; 3, grounding a resistor cabinet; 31. a ground resistor; 32. wall bushing; 33. a high voltage ac vacuum contactor; 34. a current transformer; 4. arc suppression coil cabinet; 41. arc suppression coil; 42. a vacuum on-load switch; 43. a damping box; 44. a voltage transformer; 5. and an intelligent controller.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the particular embodiments described herein are illustrative only and are not intended to limit the utility model, i.e., the embodiments described are merely some, but not all, of the embodiments of the utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present utility model.
It is noted that relational terms such as "first" and "second", and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" or the like is not excluded from a process, method, or the like that includes the element.
In the description of the present utility model, the terms "mounted," "connected," "coupled," and "connected," as may be used broadly, and may be connected, for example, fixedly, detachably, or integrally, unless otherwise specifically defined and limited; can be mechanically or electrically connected; either directly, indirectly through intermediaries, or in communication with the interior of the two elements. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art in specific cases.
In the description of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the term "provided" may be interpreted broadly, and for example, an object "provided" may be a part of a body, may be separately disposed from the body, and may be connected to the body, where the connection may be a detachable connection or an undetachable connection. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art in specific cases.
The present utility model is described in further detail below with reference to examples.
The specific embodiment 1 of the grounding variable arc suppression coil parallel small-resistance grounding complete equipment provided by the utility model comprises the following components:
as shown in fig. 1, the grounding complete device of the arc suppression coil parallel resistor provided in the embodiment includes a combination cabinet 1, the combination cabinet 1 includes a grounding transformer cabinet 2, an arc suppression coil cabinet 4 and a grounding resistor cabinet 3 which are separately arranged, a grounding transformer 21, and arc suppression coils and grounding resistors are respectively arranged in the grounding transformer cabinet 2, the arc suppression coil cabinet 4 and the grounding resistor cabinet, and a system wiring schematic diagram of the grounding complete device in the embodiment is shown in fig. 3. The grounding transformer 21 is connected with the arc suppression coil 41 and the grounding resistor 31 which are arranged in parallel, the combined cabinet 1 further comprises a controller, the controller in the embodiment is an intelligent controller 5, as shown in fig. 2, the arc suppression coil 41 and the grounding resistor 31 are respectively controlled by the controller in the on-off state of the circuit, when the circuit system is in the stable operation state, the arc suppression coil 41 is connected with the circuit, when the circuit system has a grounding fault, the arc suppression coil 41 can rapidly compensate for the arc suppression, if the circuit system fault cannot be eliminated, the grounding resistor 31 is input, the arc suppression coil 41 is cut out after the grounding resistor 31 is input, if a fault circuit is cut off, the arc suppression coil 41 is reset and then exits the grounding resistor 31, if the fault circuit is not cut off after 10 seconds (or 30 seconds) after the fault is cut off, the arc suppression coil 41 is reset and exits the grounding resistor 31 after the fault circuit is cut off, the fault operation is not more than 1 hour, so that an maintainer can quickly compensate the circuit system to eliminate the grounding fault, and the single-phase fault of the grounding complete device in the embodiment is basically shown in fig. 4 when the circuit system is in the single-phase fault state.
As shown in fig. 1, the arc suppression coil cabinet 4 and the grounding resistor cabinet 3 are respectively located on two sides of the grounding transformer cabinet 2, and in this embodiment, the arc suppression coil cabinet 4 is disposed on the right side of the grounding transformer cabinet. The grounding transformer cabinet 2 is internally provided with an isolating switch 22 and a lightning arrester 23, the lightning arrester 23 is connected with a wire inlet end of the isolating switch 22, the isolating switch 22 is arranged on the front side of the grounding transformer 21, and the isolating switch 22 and the lightning arrester 23 are both arranged on the right side in the grounding transformer cabinet 2.
The arc suppression coil cabinet 4 is internally provided with an arc suppression coil branch switch, the arc suppression coil branch switch in the embodiment is a vacuum on-load switch 42, the vacuum on-load switch 42 is connected with an outlet end of the isolating switch 22, the vacuum on-load switch 42 controls on-off of a branch where the arc suppression coil 41 is located, the vacuum on-load switch 42 is used for cutting in and cutting out the arc suppression coil 41, the arc suppression coil 41 is grounded through a damping box 43, in the embodiment, the vacuum on-load switch 42 is arranged on the front side of the arc suppression coil cabinet 4, namely, is arranged on the same side with the isolating switch 22 in the front-rear direction, the arc suppression coil 41 is arranged on the rear side of the arc suppression coil cabinet 4, and the damping box 43 is arranged above the arc suppression coil 41. The arc suppression coil cabinet 4 is internally provided with the voltage transformer 44, the voltage transformer 44 is connected with the arc suppression coil 41 and the grounding resistor 31 in parallel, the voltage transformer 44 is supported on the lower side of a connection copper bar of the vacuum on-load switch 42 leading to the arc suppression coil 41, and the vacuum on-load switch 42 and the arc suppression coil 41 are respectively arranged in the front-back direction of the arc suppression coil cabinet 4 and are far away from each other, so that the voltage transformer 44 is supported on the lower side of the connection copper bar between the vacuum on-load switch 42 and the arc suppression coil 41, a special supporting structure is not required to be arranged on the lower side of the connection copper bar alone, the cost of the grounding complete equipment is saved, the reliability of circuit connection is ensured, the space on the lower part of the connection copper bar is utilized, and the voltage transformer 44 is placed, so that the occupied area of the whole grounding complete equipment is reduced.
The grounding resistor branch switch is arranged in the grounding resistor cabinet 3 and used for controlling the on-off of a branch where the grounding resistor is located, the grounding resistor branch switch is a high-voltage alternating-current vacuum contactor 33 in the embodiment, the high-voltage alternating-current vacuum contactor 33 is connected with an outlet end of the grounding transformer 21 through a wall bushing 32, the other end of the vacuum contactor 33 is connected with the grounding resistor 31, the grounding resistor 31 is grounded 34 through a current transformer, in the embodiment, the vacuum contactor 33 and the isolating switch 22 are arranged on the same side in the front-back direction and are positioned on the front side of the grounding resistor cabinet 3, the left side close to the grounding resistor cabinet 3 is arranged close to the grounding transformer cabinet 2, and the wall bushing 32 is arranged on the side wall of the grounding transformer cabinet 2 adjacent to the grounding resistor cabinet 3. The current transformer 34 is arranged on the side of the grounding resistor cabinet 3 far away from the grounding transformer cabinet 2, namely on the right side of the grounding resistor cabinet 3, the grounding resistor 31 and the current transformer 34 are arranged on the opposite side of the grounding resistor 31 in the front-back direction, the current transformer 34 is arranged on the front side of the grounding resistor cabinet 3 in the embodiment, and the grounding resistor 31 is arranged on the rear side of the grounding resistor cabinet 3.
As shown in fig. 1, the overall cabinet 1 of the whole grounding kit in this embodiment has a length of 4000mm, a width of 2000mm and a height of 2300mm. The biggest cabinet body of size is ground connection transformer cabinet 2, and the length of ground connection transformer cabinet 2 is 2000mm, and wide is 1500mm, and high is 2300mm, because ground connection transformer cabinet 2, arc suppression coil cabinet 4 and ground connection resistance cabinet 3 components of a whole that can function independently set up, combination cabinet 1 is when transporting and the equipment, to the size requirement reduction of transportation vehicle transformer substation door, can more convenient transport, simultaneously, also to the size requirement reduction of transformer substation door, has better commonality. In addition, the grounding transformer cabinet 2, the arc suppression coil cabinet 4 and the grounding resistor cabinet 3 are integrally lifted by upper lifting, the top cover can be lifted by the whole grounding complete device without disassembly, a special lifting tool is omitted, the lifting tool can be lifted by using a conventional hanging belt or a steel wire rope, and the lifting universality is stronger.
Because grounding transformer cabinet 2, arc suppression coil cabinet 4 and ground connection resistance cabinet 3 set up for split structure, can be because the uneven high inconsistent problem when leading to the fact each cabinet body installation of cabinet body in ground when carrying out on-the-spot installation, influence the line connection between the cabinet body, the base of whole ground connection integrated equipment cabinet body, the frame is the equal channel-section steel structure, base and frame welding together, the door plant, shrouding and top cap are the sheet metal component, each part is all installed on the lateral wall and the base of combination cabinet through bolted connection, use 11M 12 bolts to connect between the cabinet body of arbitrary two split settings. The gap between the two cabinet bodies caused by split arrangement is eliminated through the channel steel structure and the bolt locking mode, the height difference is reduced, and the stability of line connection between the cabinet bodies is ensured.
The specific embodiment 2 of the grounding variable arc suppression coil parallel small-resistance grounding complete equipment provided by the utility model comprises the following components:
the difference with embodiment 1 is mainly that in this embodiment, no voltage transformer is provided to protect the circuit, and only the arc suppression coil and the grounding resistor connected in parallel are provided on the grounding transformer in the whole grounding complete device, and at this time, the damping box is provided below the arc suppression coil, so that interference to the current transformer is not caused.
The specific embodiment 3 of the grounding variable arc suppression coil parallel small-resistance grounding complete equipment provided by the utility model comprises the following components:
the difference with embodiment 1 mainly lies in that, in this embodiment, the voltage transformer sets up in the arc suppression coil cabinet, is not used for supporting the copper bar, only plays stabilizing circuit's effect, and the voltage transformer sets up in the rear side of resistance box, and this position can not interfere other parts, the wiring of being convenient for, the voltage transformer ground connection setting of being convenient for. In other embodiments, the voltage transformer may be disposed on the front side of the vacuum load switch, or other locations where interference with other electrical components does not occur, and the resistor box may be disposed on the underside of the arc suppression coil.
The specific embodiment 4 of the grounding variable arc suppression coil parallel small-resistance grounding complete equipment provided by the utility model comprises the following components:
the difference from embodiment 1 is mainly that in this embodiment, no isolating switch is provided, the outgoing terminal of the grounding transformer is directly connected with the vacuum load switch and the vacuum contactor, and the arc suppression coil and the grounding resistor can be cut out from the whole circuit system by cutting off the vacuum load switch and the vacuum contactor, and at this time, the lightning arrester inside the grounding transformer box can be arranged at the front side of the grounding transformer cabinet, so that the connection line is conveniently arranged from two sides to the arc suppression coil cabinet and the grounding resistor cabinet.
The specific embodiment 5 of the grounding variable arc suppression coil parallel small-resistance grounding complete equipment provided by the utility model comprises the following components:
the difference with embodiment 1 is mainly that, in this embodiment, the isolating switch is disposed on the left side and the rear side of the grounding transformer cabinet, the corresponding lightning arrester is disposed on the left side in the grounding transformer cabinet, the arc suppression coil branch switch is disposed on the rear side of the arc suppression coil cabinet, the arc suppression coil is disposed on the front side of the arc suppression coil cabinet, the wall bushing and the grounding resistor branch switch are disposed on the rear side of the grounding resistor cabinet, the grounding resistor is disposed on the front side of the grounding resistor, and the current transformer is disposed on the rear side of the grounding resistor cabinet.
The specific embodiment 6 of the grounding variable arc suppression coil parallel small-resistance grounding complete equipment provided by the utility model comprises the following components:
the difference with embodiment 1 mainly lies in that, in this embodiment, the arc suppression coil branch switch sets up in the middle part of arc suppression coil cabinet, and the arc suppression coil setting is provided with the right side of adjacent cabinet body in the arc suppression coil, and through the copper bar connection between arc suppression coil and the arc suppression coil branch look, voltage transformer sets up in the arc suppression coil cabinet middle part, supports in the copper bar downside, needs the circuit setting of extra subject voltage transformer to avoid interfering with the gas connection circuit this moment, and the damping case setting is in the top of arc suppression coil.
The utility model provides a specific embodiment 7 of a grounding variable arc suppression coil parallel small-resistance grounding complete device, which comprises the following components:
the difference from embodiment 1 is mainly that in this embodiment, the resistor box is disposed at the lower side of the arc suppression coil branch switch, and the voltage transformer is disposed at the lower side of the connection copper bar between the arc suppression coil and the resistor box.
The specific embodiment 8 of the grounding variable arc suppression coil parallel small-resistance grounding complete equipment provided by the utility model comprises the following components:
the main difference from embodiment 1 is that in this embodiment, no damper box is provided and the arc suppression coil is directly grounded.
The utility model provides a specific embodiment 9 of a grounding variable arc suppression coil parallel small-resistance grounding complete device, which comprises the following components:
the difference from embodiment 1 is mainly that in this embodiment, no wall bushing is provided, the vacuum contactor is directly connected to the ground transformer, and the side walls adjacent to the ground resistor cabinet and the ground transformer cabinet are perforated for the connection line to pass through.
The specific embodiment 10 of the grounding variable arc suppression coil parallel small-resistance grounding complete equipment provided by the utility model comprises the following components:
the difference from embodiment 1 is mainly that in this embodiment, the current transformer is not provided to protect the circuit, and the ground resistor is directly grounded to be provided.
The utility model provides a specific embodiment 11 of a grounding variable arc suppression coil parallel small-resistance grounding complete device, which comprises the following components:
the difference from embodiment 1 is mainly that in this embodiment, the grounding transformer cabinet, the arc suppression coil cabinet and the grounding resistor cabinet are not separately provided, the whole grounding complete set is of a complete cabinet body structure, at this time, the whole grounding complete set is integrally transported and hoisted, the line connection work is completed before leaving the factory, and the connection and assembly of the line are not required to be performed on site.
The utility model provides a specific embodiment 12 of a grounding variable arc suppression coil parallel small-resistance grounding complete device, which comprises the following components:
the difference with embodiment 1 is mainly that in this embodiment, the base and the frame of the cabinet body all adopt channel steel structures, the base and the frame are fixedly connected, and the grounding transformer cabinet, the arc suppression coil cabinet and the grounding resistor cabinet are fixed by inserting through inserting and matching inserting slots and inserting holes.
The utility model provides a specific embodiment 13 of a grounding variable arc suppression coil parallel small-resistance grounding complete device, which comprises the following components:
the difference from embodiment 1 is mainly that in this embodiment, hanging rings are not provided at the tops of the grounding transformer cabinet, the arc suppression coil cabinet and the grounding resistor cabinet, and when the box body is hoisted, the box body top cover is disassembled and the special hoisting tool is used for hoisting.
It should be noted that the above-mentioned embodiments are merely preferred embodiments of the present utility model, and the present utility model is not limited to the above-mentioned embodiments, but may be modified without inventive effort or equivalent substitution of some of the technical features thereof by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (10)
1. The grounding transformer arc suppression coil parallel connection small-resistance grounding complete device is characterized in that the grounding complete device comprises a grounding transformer cabinet (2) with a grounding transformer (21) arranged inside, an arc suppression coil cabinet (4) is arranged on the left side or the right side of the grounding transformer cabinet (2), a grounding resistor cabinet (3) is arranged on the other side of the grounding transformer cabinet, the arc suppression coil (41) is arranged in the arc suppression coil cabinet (4), the grounding resistor (31) is arranged in the grounding resistor cabinet (3), and the arc suppression coil (41) and the grounding resistor (31) are connected in parallel on the grounding transformer (21).
2. The grounding complete equipment with the small parallel resistors for the grounding transformer arc suppression coils according to claim 1, wherein a voltage transformer (44) is further arranged in the arc suppression coil cabinet (4), the voltage transformer (44) is connected with the arc suppression coils (41) and the grounding resistors (31) in parallel, and the voltage transformer (44) is supported on the lower side of a connection row in the arc suppression coil cabinet (4).
3. The grounding transformer arc suppression coil parallel connection small-resistance grounding complete device according to claim 2, characterized in that the arc suppression coil (41) and the grounding resistor (31) are connected in parallel on the grounding transformer (21) through a disconnecting switch (22), a lightning arrester (23) is connected to an inlet wire end of the disconnecting switch (22), the lightning arrester (23) and the disconnecting switch (22) are both arranged in the grounding transformer cabinet (2), the disconnecting switch (22) is arranged on the front side or the rear side of the grounding transformer (21), and the disconnecting switch (22) and the lightning arrester (23) are arranged on the same side in the left-right direction of the grounding transformer cabinet (2).
4. The grounding switching arc suppression coil parallel connection small-resistance grounding complete device according to claim 3, wherein an arc suppression coil branch switch for controlling on-off of a branch where an arc suppression coil (41) is located is arranged in the arc suppression coil cabinet (4), the arc suppression coil branch switch is arranged in the arc suppression coil cabinet (4) and on the same side of the isolating switch in the front-rear direction, and the arc suppression coil (41) is arranged on the other side of the arc suppression coil cabinet (4) in the front-rear direction.
5. The grounding variable arc suppression coil parallel connection small-resistance grounding complete device according to claim 4, wherein the arc suppression coil (41) is grounded through a damping box (43), the damping box (43) is arranged in the arc suppression coil cabinet (4), and the damping box (43) and the arc suppression coil (41) are arranged up and down.
6. The grounding transformer arc suppression coil parallel connection small-resistance grounding complete equipment according to claim 5, wherein the voltage transformer (44) is connected to the grounding transformer in parallel through the isolating switch, the voltage transformer (44) is supported on the lower side of a copper bar connected with the arc suppression coil branch switch to the arc suppression coil (41), and the damping box (43) is located above the arc suppression coil (41).
7. The grounding resistance changing arc suppression coil parallel connection small-resistance grounding complete equipment according to any one of claims 3-6, characterized in that a grounding resistance branch switch used for controlling the on-off of a branch where a grounding resistance (31) is located is arranged in the grounding resistance cabinet (3), the grounding resistance branch switch is connected to an outlet end of the isolating switch (22) through a wall bushing (32), and the grounding resistance branch switch and the isolating switch (22) are arranged on the same side in the front-rear direction and close to the grounding transformer cabinet (2) in the left-right direction.
8. The grounding switching arc suppression coil parallel connection small-resistance grounding complete device according to claim 7, wherein the grounding resistor (31) is grounded through a current transformer (34), and the current transformer (34) is arranged on one side, far away from the grounding transformer cabinet (2), in the grounding resistor cabinet (3) and on the opposite side of the grounding resistor (31) in the front-rear direction.
9. The grounding transformer arc suppression coil parallel connection small-resistance grounding complete equipment according to claim 1, wherein the grounding transformer cabinet (2), the arc suppression coil cabinet (4) and the grounding resistance cabinet (3) are arranged in a split mode, and are assembled into a combined cabinet in use.
10. The grounding transformer arc suppression coil parallel connection small-resistance grounding complete device according to claim 9, wherein cabinet bases and frames of the grounding transformer cabinet (2), the arc suppression coil cabinet (4) and the grounding resistor cabinet (3) are all of channel steel structures, the bases and the frames are fixedly connected, and the grounding transformer cabinet (2), the arc suppression coil cabinet (4) and the grounding resistor cabinet (3) are connected through threaded fasteners.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222776819.XU CN219018138U (en) | 2022-10-19 | 2022-10-19 | Grounding arc suppression coil parallel connection small-resistance grounding complete device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222776819.XU CN219018138U (en) | 2022-10-19 | 2022-10-19 | Grounding arc suppression coil parallel connection small-resistance grounding complete device |
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| Publication Number | Publication Date |
|---|---|
| CN219018138U true CN219018138U (en) | 2023-05-12 |
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|---|---|---|---|
| CN202222776819.XU Active CN219018138U (en) | 2022-10-19 | 2022-10-19 | Grounding arc suppression coil parallel connection small-resistance grounding complete device |
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| Country | Link |
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| CN (1) | CN219018138U (en) |
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- 2022-10-19 CN CN202222776819.XU patent/CN219018138U/en active Active
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