CN217406040U - Ring main unit with built-in EVT - Google Patents
Ring main unit with built-in EVT Download PDFInfo
- Publication number
- CN217406040U CN217406040U CN202220919189.4U CN202220919189U CN217406040U CN 217406040 U CN217406040 U CN 217406040U CN 202220919189 U CN202220919189 U CN 202220919189U CN 217406040 U CN217406040 U CN 217406040U
- Authority
- CN
- China
- Prior art keywords
- evt
- air chamber
- ring main
- main unit
- built
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Gas-Insulated Switchgears (AREA)
Abstract
An EVT built-in ring main unit comprising: the electric power transmission system comprises an instrument room, a mechanism room, a base, a switch air chamber, an EVT air chamber and an electric power PT unit; the rear part of the base is provided with a rear cabinet door, and a middle clapboard is arranged inside the base; the area between the middle partition plate and the rear cabinet door is used as a pressure relief chamber, and the EVT air chamber and the power taking PT unit are arranged in the pressure relief chamber; the electric-drive PT unit is arranged at the bottom of the pressure relief chamber and is positioned below the electric-drive PT unit. An EVT and a sealing insulator are arranged in an EVT air chamber, and the EVT is connected with an outgoing cable through the sealing insulator; the electricity getting PT unit is internally provided with an electricity getting PT which is connected with the outgoing cable through a connecting cable. The utility model discloses a miniaturized integrated design EVT air chamber with get electric PT integral installation in the base, realize that whole cabinet appearance is regular, the size is miniaturized, be convenient for maintain, the reliability is high.
Description
Technical Field
The utility model relates to a looped netowrk cabinet technical field particularly, relates to a looped netowrk cabinet of built-in EVT.
Background
The ring main unit is a group of electric equipment which is arranged in a metal or nonmetal insulating cabinet or made into an assembled interval ring main power supply unit, the core part of the ring main unit comprises a vacuum circuit breaker, a load switch, an isolating switch and the like, the ring main unit has the advantages of small volume, simple structure, convenience for construction maintenance, power supply safety and the like, and is widely used in distribution stations and box-type substations of load centers of urban residences, large-scale buildings, industrial and mining enterprises and the like.
In the prior art, an electromagnetic voltage transformer is generally adopted in a conventional ring main unit, but the voltage transformer is large in size, heavy in weight, high in insulation requirement and inconvenient to install and maintain. Particularly, the three-phase five-column voltage transformer for collecting phase voltage and zero sequence voltage is larger in size and more complex in insulation, directly influences the size of a voltage transformer cabinet and the occupied area of a complete ring main unit, is serious in electromagnetic interference, is more prone to ferromagnetic resonance, explosion and other problems, and seriously restricts the automatic construction and safe and stable operation of a power distribution network.
In the prior art, a ring main unit with an ECT and an EVT built in (CN211958551U) collects phase Voltage signals and zero sequence Voltage signals by using an Electronic Voltage Transformer (EVT), but the line Voltage signals still need to be collected by an external single-phase Voltage Transformer, which overcomes various problems caused by an electromagnetic Voltage Transformer in a conventional ring main unit, but the EVT is arranged in an open manner in the ring main unit, so air insulation increases the size of the ring main unit, and is not beneficial to the compactness and miniaturization of the ring main unit. 'A ring main unit with built-in electronic voltage transformer' (CN210898013U) provides an EVT with SF filling through a nested arrangement of an outer shell casting, a sealing element and an inner shell casting 6 The insulation of the EVT is guaranteed in the compact and miniaturized design of the ring main unit due to the airtight environment of the gas, but the technology does not mention how to arrange the EVT in the ring main unit so as to meet the requirements of safety, stability and compact structure in the ring main unit.
SUMMERY OF THE UTILITY MODEL
In order to solve the defects in the prior art, the utility model aims to provide a ring main unit with an EVT inside, which can ensure reliable insulation, safety and stability in the ring main unit while realizing the compactness and miniaturization of the whole ring main unit; under the premise of not increasing the complexity of the cabinet body and not reducing the protection level of the whole shell, the size of the complete ring main unit is reduced, and the overall performance of the product is improved.
The utility model adopts the following technical proposal.
An EVT built-in ring main unit comprising: the device comprises an instrument room, a mechanism room, a base and a switch air chamber; the instrument room is arranged at the top of the ring main unit, the mechanism room is arranged right below the instrument room, the switch air chamber is arranged behind the mechanism room, and the base is arranged right below the mechanism room and the switch air chamber.
The rear part of the base is provided with a rear cabinet door, and a middle clapboard is arranged inside the base; an area between the middle partition plate and the rear cabinet door is used as a pressure relief chamber, and an EVT (EVT) air chamber and a power taking PT (Potential Transformer) unit are arranged in the pressure relief chamber; the electric power taking PT unit is arranged at the bottom of the pressure relief chamber and is located below the electric power taking PT unit.
The fixed support is detachably connected with the top of the pressure relief chamber.
The EVT is arranged at the bottom of the EVT air chamber, the sealing insulator is arranged at the top of the EVT air chamber, and the EVT is connected with the outgoing cable through the sealing insulator; the electricity getting PT unit is internally provided with an electricity getting PT which is connected with the outgoing cable through a connecting cable.
The EVT air chamber comprises an inflation box body; the interior of the inflation box body is inflated.
The bottom of the inflation box body is provided with an EVT, the top of the inflation box body is provided with a sealing insulator, and a wiring terminal of the EVT is electrically connected with the sealing insulator through a connecting conductor.
One side of the inflation box body is provided with a barometer and an outgoing line aviation plug.
The other side of the inflatable box body is provided with a cover plate, the cover plate is pressed and fixed on the inflatable box body by using a fastener, and a sealing ring is arranged between the cover plate and the inflatable box body.
The fastener is detachable with aerifing the box connected mode.
An EVT parallel sleeve, a power-taking PT parallel sleeve and a wire-inlet sleeve are arranged at the bottom of the switch air chamber; the copper bar is used for electrically connecting the EVT parallel sleeve, the electricity taking PT parallel sleeve and the wire inlet sleeve.
The sealing insulator is electrically connected with the EVT parallel sleeve, the connecting cable is electrically connected with the electricity-taking PT parallel sleeve through the pair of plugs, and the wire inlet sleeve is electrically connected with the wire outlet cable.
The front part of the base is provided with a front cabinet door, and the area between the middle partition plate and the front cabinet door is used as an outgoing cable chamber.
A current transformer, a T-shaped cable head and an outgoing cable are arranged in the outgoing cable chamber; the current transformer and the T-shaped cable head are arranged at the top of the outgoing cable chamber.
The outgoing cable is electrically connected with the incoming sleeve through the T-shaped cable head and the current transformer.
Switch air chamber internally mounted switch body subassembly uses the copper bar to carry out electrical connection to EVT parallel sleeve, get electric PT parallel sleeve, inlet wire sleeve pipe and the binding post of switch body subassembly.
An expansion insulating sleeve is arranged at the top of the switch air chamber.
The beneficial effects of the utility model reside in that, compare with prior art:
1. the utility model integrally installs the EVT air chamber and the electricity getting PT unit in the base of the ring main unit, and the EVT air chamber and the electricity getting PT unit have regular shapes and small sizes, thereby realizing the compactness and miniaturization of the whole set of ring main unit;
2. the utility model discloses encapsulate the EVT alone in sealed air chamber, can use air insulation, SF 6 The gas insulation or other gas insulation not only improves the insulation reliability, eliminates the ferromagnetic resonance risk in principle, and improves the operation safety and stability; and use of SF 6 Gas insulation or other gas insulation can further reduce the overall size of the EVT gas chamber;
3. the EVT air chamber realizes sealing and electric conduction through the sealing insulator, and is the basis of compact arrangement and miniaturization of the EVT air chamber;
4. the matching use of EVT and get electric PT can gather the various voltage signals of the return circuit of being qualified for the next round of competitions, satisfies looped netowrk cabinet operation data requirement.
Drawings
Fig. 1 is an external view of a ring main unit with an EVT built in according to the present invention;
fig. 2 is a schematic diagram of an internal structure of a ring main unit with an EVT built therein according to the present invention;
fig. 3 is a schematic structural diagram of an EVT air chamber in the ring main unit with an EVT built therein according to the present invention;
the reference numerals in fig. 1 to 3 are explained as follows:
10-instrument room;
20-mechanism chamber; 201-an operating mechanism assembly; 202-a panel;
30-a base; 301-a current transformer; a 302-T cable head; 303-a cable; 304-a middle partition; 305-connecting a cable; 306-a fixed support; 307-pair of plugs; 308-front cabinet door; 309-rear cabinet door;
40-switching on and off the air chamber; 401-EVT parallel sleeve; 402-taking electricity PT parallel casing; 403-copper bar; 404-a wire-in sleeve; 405-a switch body assembly; 406-an extension insulation sleeve;
50-EVT plenum; 501-inflating box body; 502-sealing ring; 503-cover plate; 504-a fastener; 505-a sealing insulator; 506-a connecting conductor; 507-EVT; 508-barometer; 509-outgoing aviation plug;
60-power taking PT unit.
Detailed Description
The present application is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Fig. 1 shows a ring main unit with an EVT built in, comprising: the instrument room 10, the mechanism room 20, the base 30 and the switch air chamber 40; the instrument room 10 is arranged at the top of the ring main unit, a mechanism room 20 is arranged right below the instrument room 10, a switch air chamber 40 is arranged behind the mechanism room 20, and a base 30 is arranged right below the mechanism room 20 and the switch air chamber 40.
As shown in fig. 2, the ring main unit is further internally provided with an EVT air chamber 50 and a power-taking PT unit 60; a rear cabinet door 309 is arranged at the rear part of the base 30, and a middle partition plate 304 is arranged inside the base 30; the area between the intermediate partition 304 and the rear cabinet door 309 serves as a pressure relief chamber in which the EVT air chamber 50 and the power taking PT unit 60 are arranged; wherein, EVT air chamber 50 hoists at the top of pressure relief chamber and EVT air chamber 50 is located the switch air chamber 40 directly below through fixed bolster 306, and it is located the below of EVT air chamber 50 to get electric PT unit 60 and install the bottom in pressure relief chamber. The sealing insulator is used for sealing the EVT air chamber after the EVT air chamber is inflated; the EVT is used for collecting phase voltage and zero sequence voltage, and the power acquisition PT is used for collecting phase-to-phase voltage.
The fixed bracket 306 is detachably connected with the top of the pressure relief chamber, and the EVT air chamber 50 is detached from the top of the pressure relief chamber after the fixed bracket 306 is detached.
As shown in fig. 3, an EVT 507 and a sealing insulator 505 are arranged in an EVT gas chamber, the EVT 507 is installed at the bottom of the EVT gas chamber 50, the sealing insulator 505 is installed at the top of the EVT gas chamber 50, and the EVT 507 is connected with an outgoing cable through the sealing insulator; the power getting PT unit is internally provided with a power getting PT which is connected with the outgoing cable through a connecting cable 305.
EVT plenum 50 includes a plenum housing 501; the inside of the inflating tank 501 inflates. EVT gas chambers are internally gas insulated. Insulating gases include, but are not limited to: SF 6 Gas, air.
An EVT 507 is arranged at the bottom of the inflation box body 501, a sealing insulator 505 is arranged at the top of the inflation box body 501, and a connecting terminal of the EVT 507 is electrically connected with the sealing insulator 505 through a connecting conductor 506; one side surface of the inflation box body 501 is provided with a barometer 508 and an outgoing aviation plug 509; the other side of the air inflation case 501 is provided with a cover plate 503, the cover plate 503 is fixed to the air inflation case 501 by pressing with a fastener 504, and a seal ring 502 is provided between the cover plate 503 and the air inflation case 501. The seal 502 fills the gap between the cover plate 503 and the gas-filled tank 501. The barometer 508 is used for monitoring the atmospheric pressure in the inflation box, and the outlet aviation plug 509 is used for connecting a voltage measurement signal line.
The fastener 504 is detachably connected with the inflation tank 501. After the fasteners 504 are removed and the cover plate 503 is opened, the EVT 507 is mounted or dismounted in the EVT plenum, and the operation of connecting the conductors 506 and the hermetic insulator 505 is also performed.
An EVT parallel sleeve 401, a power-taking PT parallel sleeve 402 and a wire-inlet sleeve 404 are arranged at the bottom of the switch air chamber 40; the hermetic insulator 505 is electrically connected to the EVT shunt sleeve 401, and the connection cable is electrically connected to the power-taking PT shunt sleeve 402 through the plug 307.
The EVT parallel bushing 401, the power-taking PT parallel bushing 402 and the inlet bushing 404 are electrically connected using copper bars 403, and the inlet bushing 404 is electrically connected with the outlet cable.
A front cabinet door 308 is arranged at the front part of the base 30, and the area between the middle partition plate 304 and the front cabinet door 308 is used as an outgoing cable chamber; a current transformer 301, a T-shaped cable head 302 and an outgoing cable 303 are arranged in the outgoing cable chamber; the current transformer 301 and the T-shaped cable head 302 are arranged at the top of the outlet cable chamber; the outgoing cable 303 is electrically connected to the incoming bushing 404 via the T-head 302 and the current transformer 301.
The top of the switching plenum 40 is provided with an extended insulating sleeve 406. The extension insulating sleeve is used for electrical connection between different ring main units.
The applicant of the present invention has made detailed description and description of the embodiments of the present invention with reference to the drawings, but those skilled in the art should understand that the above embodiments are only the preferred embodiments of the present invention, and the detailed description is only for helping the reader to better understand the spirit of the present invention, and not for the limitation of the protection scope of the present invention, on the contrary, any improvement or modification made based on the spirit of the present invention should fall within the protection scope of the present invention.
Claims (10)
1. A ring main unit with an EVT built in, the ring main unit comprising: the device comprises an instrument room (10), a mechanism room (20), a base (30) and a switch air chamber (40); the ring main unit is characterized in that the instrument room (10) is arranged at the top of the ring main unit, a mechanism room (20) is arranged right below the instrument room (10), a switch air chamber (40) is arranged behind the mechanism room (20), and a base (30) is arranged below the mechanism room (20) and the switch air chamber (40); it is characterized in that the preparation method is characterized in that,
a rear cabinet door (309) is arranged at the rear part of the base (30), and a middle partition plate (304) is arranged inside the base (30); the area between the middle partition plate (304) and the rear cabinet door (309) is used as a pressure relief chamber, and an EVT air chamber (50) and a power taking PT unit (60) are arranged in the pressure relief chamber; the electric power taking PT unit (60) is arranged at the bottom of the pressure relief chamber, and the electric power taking PT unit (60) is located below the EVT air chamber (50);
an EVT (507) and a sealing insulator (505) are arranged in the EVT air chamber (50), the EVT (507) is installed at the bottom of the EVT air chamber (50), the sealing insulator (505) is installed at the top of the EVT air chamber (50), and the EVT (507) is connected with an outlet cable through the sealing insulator (505); the electricity getting PT unit is internally provided with an electricity getting PT which is connected with the outgoing cable through a connecting cable (305).
2. The ring main unit with an EVT built-in structure as claimed in claim 1,
the EVT plenum (50) includes an inflatable box (501); the interior of the inflation box body (501) is inflated;
an EVT (507) is installed at the bottom of the inflation box body (501), a sealing insulator (505) is installed at the top of the inflation box body (501), and a wiring terminal of the EVT (507) is electrically connected with the sealing insulator (505) through a connecting conductor (506);
one side surface of the inflation box body (501) is provided with a barometer (508) and an outgoing line aviation plug (509).
3. The ring main unit with an EVT built-in structure as claimed in claim 2,
the other side of the inflatable box body (501) is provided with a cover plate (503), the cover plate (503) is pressed and fixed on the inflatable box body (501) by using a fastener (504), and a sealing ring (502) is arranged between the cover plate (503) and the inflatable box body (501).
4. The ring main unit with an EVT built-in structure as claimed in claim 1,
the fixed bracket (306) is detachably connected with the top of the pressure relief chamber.
5. The ring main unit with an EVT built-in structure as claimed in claim 3,
the fastener (504) is detachably connected with the inflation box body (501).
6. The ring main unit with an EVT built-in structure as claimed in claim 1,
an EVT parallel sleeve (401), a power-taking PT parallel sleeve (402) and a wire-inlet sleeve (404) are arranged at the bottom of the switch air chamber (40); an EVT parallel sleeve (401), a power taking PT parallel sleeve (402) and a line-in sleeve (404) are electrically connected by a copper bar (403).
7. The ring main unit with an EVT built-in structure as claimed in claim 6,
the sealing insulator (505) is electrically connected with the EVT parallel sleeve (401), the connecting cable (305) is electrically connected with the power-taking PT parallel sleeve (402) through the plug (307), and the wire inlet sleeve (404) is electrically connected with the wire outlet cable.
8. The ring main unit with an EVT built-in structure as claimed in claim 6,
a front cabinet door (308) is arranged at the front part of the base (30), and the area between the middle partition plate (304) and the front cabinet door (308) is used as an outgoing cable chamber;
a current transformer (301), a T-shaped cable head (302) and an outgoing cable (303) are arranged in the outgoing cable chamber; the current transformer (301) and the T-shaped cable head (302) are arranged at the top of the outlet cable chamber;
the outgoing cable (303) is electrically connected with the incoming sleeve (404) through the T-shaped cable head (302) and the current transformer (301).
9. The ring main unit with an EVT built-in structure as claimed in claim 6,
switch air chamber (40) internally mounted switch body subassembly (405), use copper bar (403) to carry out electrical connection to EVT parallel sleeve (401), get electric PT parallel sleeve (402), inlet wire sleeve (404) and the binding post of switch body subassembly (405).
10. The ring main unit with an EVT built-in according to any one of claims 1 to 9,
an expansion insulating sleeve (406) is arranged at the top of the switch air chamber (40).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220919189.4U CN217406040U (en) | 2022-04-20 | 2022-04-20 | Ring main unit with built-in EVT |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220919189.4U CN217406040U (en) | 2022-04-20 | 2022-04-20 | Ring main unit with built-in EVT |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217406040U true CN217406040U (en) | 2022-09-09 |
Family
ID=83142128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220919189.4U Active CN217406040U (en) | 2022-04-20 | 2022-04-20 | Ring main unit with built-in EVT |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217406040U (en) |
-
2022
- 2022-04-20 CN CN202220919189.4U patent/CN217406040U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN2836279Y (en) | 12KV indoor AC high-voltage sulfur hexafluoride ring network switchgear | |
| CN201113291Y (en) | Outdoor common box type sulfur hexafluoride multi-loop ring net cabinet | |
| CN201113331Y (en) | Outdoor low-voltage integrated distribution box on column | |
| CN109148204B (en) | Gas insulated totally-enclosed combined electrical apparatus and three-station isolation grounding switch thereof | |
| CN217406040U (en) | Ring main unit with built-in EVT | |
| CN213125124U (en) | Mine explosion-proof intelligent high-voltage complete set distribution device | |
| CN210326509U (en) | Dual-power intelligent integrated high-voltage power distribution device | |
| CN219106893U (en) | Compact box-type substation | |
| CN202678738U (en) | Configuration structure of 100kV double bus PASS power distribution unit | |
| CN114156763B (en) | Economical switchgear suitable for wind power | |
| CN218040443U (en) | EVT complete set looped netowrk cabinet | |
| CN110768109A (en) | Detachable isolated fracture bus | |
| CN2919626Y (en) | Digital three-phase integrated air inflation chamber separating module | |
| CN201674138U (en) | Box type fixed high-tension ring network switchgear | |
| CN218732743U (en) | Compact switch cabinet | |
| CN215185477U (en) | Gas insulated switchgear of full-insulated tubular bus outgoing line | |
| CN220858595U (en) | Controller mounting structure of circuit breaker of Internet of things | |
| CN214673878U (en) | Compact 35kV prepackage type transformer substation high-voltage combined electrical apparatus device | |
| CN221239551U (en) | Digital magnetic control circuit breaker | |
| CN114142377B (en) | Bus-tie lifting cabinet | |
| CN214379711U (en) | Fixed insulating ring main unit | |
| CN220652608U (en) | Circuit breaker high-voltage board for energy storage box transformer substation | |
| CN215267384U (en) | 10kV miniaturized air insulation switch cabinet | |
| CN218334991U (en) | Gas insulation boundary switch cabinet and metering device | |
| CN217882570U (en) | Inflatable cabinet structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |