CN210040901U - Outdoor box body of low-voltage three-phase unbalanced load compensation device - Google Patents
Outdoor box body of low-voltage three-phase unbalanced load compensation device Download PDFInfo
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- CN210040901U CN210040901U CN201920867500.3U CN201920867500U CN210040901U CN 210040901 U CN210040901 U CN 210040901U CN 201920867500 U CN201920867500 U CN 201920867500U CN 210040901 U CN210040901 U CN 210040901U
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- box body
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- 239000002184 metal Substances 0.000 claims abstract description 4
- 229910052751 metal Inorganic materials 0.000 claims abstract description 4
- 229920000742 Cotton Polymers 0.000 claims description 5
- 238000010521 absorption reaction Methods 0.000 claims 1
- 230000006378 damage Effects 0.000 abstract description 7
- 238000001816 cooling Methods 0.000 abstract description 6
- 238000005192 partition Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 description 6
- 239000000428 dust Substances 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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Abstract
The utility model relates to the technical field of power supply and distribution, in particular to an outdoor box body of a low-voltage three-phase load unbalance compensation device, which comprises a box body which is made of a metal framework and plates and is shaped like a cuboid, wherein the side surface of the box body of a front box door or a rear box door is provided with a wire inlet pipe; the front side and the rear side of the box body are respectively hinged with a front box door and a rear box door, a door lock used for limiting the position of the front box door or the rear box door is arranged between the front box door or the rear box door and the box body, and an exhaust door is arranged at the upper part of the rear box door; the novel refrigerator is characterized in that a partition plate is arranged between the front door and the rear door in the refrigerator body, the partition plate divides the interior of the refrigerator body into a front chamber and a rear chamber, the tops of the front chamber and the rear chamber are communicated, an air inlet hole is formed in the bottom of the front chamber of the refrigerator body, and a filter and an exhaust fan are arranged in the air inlet hole. The utility model discloses a dustproof rain-proof and cooling measure has solved unbalanced three-phase load compensation arrangement and has poor at outdoor operational environment, the problem of easy damage that takes place.
Description
Technical Field
The utility model belongs to the technical field of the power supply and distribution technique and specifically relates to an unbalanced low pressure three-phase load compensation arrangement's outdoor box is related to.
Background
In an electric power system, a three-phase imbalance condition is one of the main indicators of the quality of electric energy. Three-phase imbalance means that three-phase currents (or voltages) have inconsistent amplitudes in a power system, and the amplitude difference exceeds a specified range. In a low-voltage three-phase four-wire system power supply system for urban residents and rural power grids, as most power consumers are single-phase loads or single-phase and three-phase loads are mixed, the loads are different in size and the power consumption time is different. Therefore, unbalanced currents among three phases in the power grid exist objectively, and the power utilization unbalance condition is irregular and cannot be predicted in advance, so that the long-term unbalance of the three-phase load of the low-voltage power supply system is caused.
If the distribution transformer operates when the three-phase load is unbalanced, the output currents of all phases are unequal, and the voltage drops of three phases in the distribution transformer are unequal, which inevitably causes the three-phase imbalance of the output voltage of the distribution transformer. Meanwhile, when the distribution transformer operates when three-phase loads are unbalanced, three-phase output currents are different, and current can pass through a neutral line. Thus, the neutral line generates impedance drop, which causes neutral point shift, resulting in phase voltage variation of each phase. The phase voltage of the heavy load decreases and the phase voltage of the light load increases. When the power is supplied under the condition of unbalanced voltage, the user electric equipment with a high voltage and a connected band is easy to burn out, and the user electric equipment with a low voltage and a connected band cannot be used. Therefore, when the three-phase load is in unbalanced operation, the safe operation of the electric equipment is seriously threatened. The distribution transformer operates under the working condition of three-phase load unbalance, and three-phase unbalance of output voltage is caused. Because the unbalanced voltage has three voltage components of positive sequence, negative sequence and zero sequence, when the unbalanced voltage is input into the motor, the negative sequence voltage generates a rotating magnetic field which is opposite to the rotating magnetic field generated by the positive sequence voltage, and the braking effect is achieved. But since the positive sequence field is much stronger than the negative sequence field, the motor still rotates in the direction of the positive sequence field. And the braking action of the negative sequence magnetic field inevitably causes the output power of the motor to be reduced, thereby causing the efficiency of the motor to be reduced. Meanwhile, the temperature rise and the reactive loss of the motor are increased along with the unbalance degree of the three-phase voltage. Therefore, the motor is operated under the condition of unbalanced three-phase voltage, which is very uneconomical and unsafe. Unbalanced current in the power grid can also increase copper loss of lines and transformers, iron loss of the transformers can also be increased, output of the transformers is reduced, even safe operation of the transformers can be affected, and finally unbalance of three-phase voltage can be caused.
For improving the unbalanced three-phase load phenomenon that the low voltage electric wire netting ubiquitous, many distribution transformers all install unbalanced three-phase load compensation arrangement in the low pressure side, unbalanced low pressure three-phase load compensation arrangement compares in general electric device at the during operation, and calorific capacity is very big, and it belongs to accurate piece, moisture and dust in the environment if get into work area, can cause the short circuit accident to take place, will cause fatal injury to it, so require the box to have good rain-proof, dustproof, heat dissipation function and installation wiring convenience, easy maintenance. The switch board, the outdoor cabinet box that electric field generally used can't satisfy the device and set up the requirement in the open air.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at prior art not enough, provide an unbalanced compensation arrangement's of low pressure three-phase load outdoor box, adopt dustproof rain-proof and cooling measure, solved unbalanced compensation arrangement of three-phase load poor at outdoor operational environment, the problem of easy damage that takes place.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an outdoor box body of a low-voltage three-phase load unbalance compensation device comprises a box body which is made of a metal framework and plates and is in a cuboid shape, wherein a wire inlet pipe is arranged on the side surface of the box body of a front box door or a rear box door of the box body, and the wire inlet pipe is a 90-degree circular pipe elbow; the front side and the rear side of the box body are respectively hinged with a front box door and a rear box door, a door lock used for limiting the position of the front box door or the rear box door is arranged between the front box door or the rear box door and the box body, and an exhaust door is arranged at the upper part of the rear box door; the novel refrigerator is characterized in that a partition plate is arranged between the front door and the rear door in the refrigerator body, the partition plate divides the interior of the refrigerator body into a front chamber and a rear chamber, the tops of the front chamber and the rear chamber are communicated, an air inlet hole is formed in the bottom of the front chamber of the refrigerator body, and a filter and an exhaust fan are arranged in the air inlet hole.
Furthermore, the air exhaust door comprises an air exhaust hole and a one-way air door arranged on the outer side of the box body.
Furthermore, the one-way air door comprises a plurality of hinged shafts and a door plate connected with the hinged shafts.
Furthermore, an air door shield is arranged outside the one-way air door.
Furthermore, the inner wall of the air door shield is provided with sound-absorbing cotton.
The utility model has the advantages that:
the utility model has the advantages that the inlet wire is led in through the elbow with the downward opening, and the inlet wire pipe has certain rainproof function when raining; when the temperature in the box body exceeds a specified value, the exhaust fan is started to perform forced air cooling on the three-phase load unbalance compensation device arranged at the front chamber, outdoor low-temperature air flow enters the box body from the bottom of the front chamber, enters the rear chamber through the top of the box body and enters an exhaust door arranged on a rear box door arranged outside the rear chamber, the air flow pushes the door plate to be opened along the hinged shaft, enters the outside of the box body through the air door shield and brings out high temperature in the box body, and forced air cooling of equipment in the box body is completed; meanwhile, the sound-absorbing cotton arranged on the air door shield absorbs a part of noise released in the box body, so that the noise harm of the box body to the surrounding environment is reduced. When the temperature in the box is lower than the specified value, the exhaust fan stops working, the door plate falls and closes under the dead weight, the air exhaust hole is blocked, and outdoor rainwater and dust are prevented from entering the box through the air exhaust hole, so that the dustproof and rainproof effects are achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view of the structure of the present invention;
fig. 2 is a left side view structure diagram of the present invention;
fig. 3 is an enlarged schematic view of the exhaust door of the present invention.
In the figure: 1-base, 2-inlet pipe, 3-exhaust door, 31-articulated shaft, 32-door panel, 33-air door shield, 4-door lock, 5-switch, 6-rear door, 7-isolation plate, 8-filter, 9-exhaust fan, 10-three-phase load unbalance compensation device and 11-front door.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1, 2 and 3, the outdoor box of the low-voltage three-phase load imbalance compensation device comprises a rectangular box body made of a metal framework and plates, and the box body is installed on a suspended transformer platform or a wire pole support through a base 1 at the bottom. The box is in the box side of preceding chamber door 11 or back chamber door 6 is provided with inlet wire pipe 2, inlet wire pipe 2 is located the upper portion of switch 5 in the box, inlet wire pipe 2 is 90 degrees pipe elbows, the export of elbow is down, through the mode that sets up of this kind of inlet wire pipe 2 for the cable gets into behind the box directly to be connected with switch 5, is favorable to the wiring of box and keeps the clean and tidy of circuit in the box, and the return bend also provides better support for the bending of cable simultaneously, is favorable to protecting the cable to avoid the bending damage of bending radius undersize initiation cable in the construction.
The front side and the back side of the box body are respectively hinged with a front box door 11 and a back box door 6, a door lock 4 used for limiting the position of the front box door 11 or the back box door 6 is further arranged between the front box door 11 or the back box door 6 and the box body, the safety of equipment is kept by utilizing the front box door 11 or the back box door 6 and the door lock 4 arranged on the front box door 11 or the back box door 6 at ordinary times, the corresponding equipment can be maintained and replaced through the front box door 11 or the back box door 6 during working, and the maintenance operation of the box body is.
The upper part of the rear box door 6 is provided with an exhaust door 3, a separation plate 7 is arranged between the front box door 11 and the rear box door 6 in the box body, and two sides of the separation plate 7 are respectively provided with an equipment mounting rack for supporting a switch 5 and a three-phase load imbalance compensation device 10 in the box body; the partition board 7 divides the interior of the box body into a front chamber and a rear chamber, the tops of the front chamber and the rear chamber are communicated, the front chamber is used for arranging a three-phase load unbalance compensation device 10, and the rear chamber is used for arranging a switch 5; and an air inlet hole is formed in the bottom of the front chamber of the box body, and a filter 8 and an exhaust fan 9 are arranged in the air inlet hole. The filter 8 can be an air filter element or other air filtering devices and is mainly used for filtering floating objects such as dust and the like in air entering the box body and preventing the floating objects from being attached to components in the box body and damaging the insulation among the components to cause equipment damage; the exhaust fan 9 is mainly used for forced ventilation in the box body and comprises a control device, a motor and fan blades arranged on an output shaft of the motor, wherein the control device detects the temperature of air in the box body through a temperature sensor and controls the motor to be started or stopped, so that the box body is forcibly cooled when the temperature exceeds a specified value, and the fan is stopped to operate when the temperature is lower than the specified value, and the purpose of protecting the box body to work at a proper temperature on the premise of energy conservation is achieved.
As shown in fig. 3, in this embodiment, the exhaust door 3 further includes an exhaust hole and a one-way air door disposed outside the box body, and the exhaust hole is a through hole formed in the rear box door 6. In this embodiment, further, the one-way damper includes a plurality of hinge shafts 31 and a door plate 32 connected to the hinge shafts 31, and the door plate 32 is hinged to the rear door 6 through the hinge shafts 31. Door plant 32 is the rectangle, and its length is equivalent with the length in ventilation hole, and the width is adjacent articulated shaft 31's interval, and is a plurality of door plant 32 blocks the hole of airing exhaust through the dead weight sag, and when needs the exhaust in the box, the wind current promotes door plant 32 and opens, and the heat in the box is along with the wind current and discharges.
In this embodiment, further, the outside of one-way air door still is provided with air door guard shield 33, air door guard shield 33 includes guardrail and baffle, the baffle covers outside the hole of airing exhaust, the guardrail mainly used supports the baffle, and the height of this guardrail is greater than the width of door plant 32 for the guardrail can not influence opening of door plant 32, and this guardrail also can be preferred only the bottom sets up the opening and communicates with the outside, and air door guard shield 33's effect mainly provides certain guard action for the air door.
In this embodiment, further, the inner wall of the damper guard 33 is provided with sound absorbing cotton for absorbing noise released from the exhaust hole.
The device feeds in through the elbow with the downward opening, and the inlet pipe 2 has a certain rainproof effect when raining; when the temperature in the box body exceeds a specified value during working, the exhaust fan 9 is started to perform forced air cooling on the three-phase load unbalance compensation device 10 arranged at the front chamber, outdoor low-temperature air flow enters the box body from the bottom of the front chamber, enters the rear chamber through the top of the box body and enters the exhaust door 3 on the rear box door 6 arranged outside the rear chamber, the air flow pushes the door plate 32 to be opened along the hinge shaft 31 and enters the outdoor through the air door shield 33, and high temperature in the box body is taken out, so that the forced air cooling of equipment in the box body is completed; meanwhile, the sound-absorbing cotton arranged on the air door shield 33 absorbs a part of noise released in the box body, and noise harm of the box body to the surrounding environment is reduced. When the temperature in the box body is lower than the specified value, the exhaust fan 9 stops working, the door plate 32 falls and closes under the dead weight, the exhaust hole is blocked, outdoor rainwater and dust are prevented from entering the box body through the exhaust hole, and the dustproof and rainproof effects are achieved.
It should be understood that the above detailed description of the present invention is only for illustrating the present invention and is not limited by the technical solutions described in the embodiments of the present invention, and those skilled in the art should understand that the present invention can still be modified or equivalently replaced to achieve the same technical effects; as long as the use requirement is satisfied, the utility model is within the protection scope.
Claims (5)
1. The utility model provides a low pressure three-phase unbalanced load compensation arrangement's outdoor box, includes that the appearance made by metal framework and panel is the box of cuboid, its characterized in that: the front side and the rear side of the box body are respectively hinged with a front box door (11) and a rear box door (6), a door lock (4) used for limiting the position of the front box door (11) or the rear box door (6) is arranged between the front box door (11) or the rear box door (6) and the box body, and an exhaust door (3) is arranged at the upper part of the rear box door (6); the box body is provided with a wire inlet pipe (2) on the side surface of the box body of the front box door (11) or the rear box door (6), and the wire inlet pipe (2) is a 90-degree circular pipe elbow; be provided with division board (7) in the box between front chamber door (11) and back chamber door (6), division board (7) will the inside of box divide into antechamber and the rear chamber of top intercommunication, the bottom of antechamber of box is provided with the fresh air inlet, the fresh air inlet is provided with filter (8) and air exhauster (9).
2. The outdoor box body of the low-voltage three-phase load unbalance compensation device according to claim 1, characterized in that: the exhaust door (3) comprises an exhaust hole and a one-way air door arranged on the outer side of the box body.
3. The outdoor box body of the low-voltage three-phase load unbalance compensation device according to claim 2, characterized in that: the one-way air door comprises a plurality of hinged shafts (31) and a door plate (32) connected with the hinged shafts (31).
4. The outdoor box body of the low-voltage three-phase load unbalance compensation device according to claim 2 or 3, characterized in that: and an air door shield (33) is also arranged outside the one-way air door.
5. The outdoor box body of the low-voltage three-phase load unbalance compensation device according to claim 4, characterized in that: the inner wall of the air door shield (33) is provided with sound absorption cotton.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920867500.3U CN210040901U (en) | 2019-06-11 | 2019-06-11 | Outdoor box body of low-voltage three-phase unbalanced load compensation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920867500.3U CN210040901U (en) | 2019-06-11 | 2019-06-11 | Outdoor box body of low-voltage three-phase unbalanced load compensation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210040901U true CN210040901U (en) | 2020-02-07 |
Family
ID=69347347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920867500.3U Expired - Fee Related CN210040901U (en) | 2019-06-11 | 2019-06-11 | Outdoor box body of low-voltage three-phase unbalanced load compensation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210040901U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111585198A (en) * | 2020-05-11 | 2020-08-25 | 国网浙江瑞安市供电有限责任公司 | Intelligent comprehensive management device for power quality of rural power grid distribution station area |
-
2019
- 2019-06-11 CN CN201920867500.3U patent/CN210040901U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111585198A (en) * | 2020-05-11 | 2020-08-25 | 国网浙江瑞安市供电有限责任公司 | Intelligent comprehensive management device for power quality of rural power grid distribution station area |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200207 Termination date: 20200611 |