CN201490611U - Indoor high-voltage tank type metal closed ring main unit - Google Patents
Indoor high-voltage tank type metal closed ring main unit Download PDFInfo
- Publication number
- CN201490611U CN201490611U CN2009201903804U CN200920190380U CN201490611U CN 201490611 U CN201490611 U CN 201490611U CN 2009201903804 U CN2009201903804 U CN 2009201903804U CN 200920190380 U CN200920190380 U CN 200920190380U CN 201490611 U CN201490611 U CN 201490611U
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- CN
- China
- Prior art keywords
- load switch
- switch
- main unit
- ring main
- fuse
- 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.)
- Expired - Fee Related
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Abstract
The utility model relates to an indoor high-voltage tank type metal closed ring main unit, which comprises a shell, a bus chamber, a main switch, a cable chamber, a manipulation chamber, an instrument chamber, a fuse, an earthed switch, a current mutual inductor and a connecting cable. The main switch is a sulfur hexafluoride load switch; primarily, a fixed contact of the load switch is provided with a corrugated tube insulator; surface creepage distance between the upper end of the corrugated tube insulator and a metal mounting frame is 480 mm; the outer surface of a lower cover at the lower end of a movable contact of the load switch is provided with a plurality of layers of annular insulated gates to ensure that the surface creepage distance between the movable contact of the load switch and the metal mounting frame reaches 480 mm; and interphase distance between the adjacent two phases is 275 mm. The indoor high-voltage tank type metal closed ring main unit has high insulation level and is suitable for a high-voltage power transmission and distribution system of 24kV voltage level.
Description
Technical field
The utility model relates to a kind of switchgear, particularly about a kind of box metal enclosed ring main unit.The utility model is applicable to 24KV three-phase alternating current 50/60Hz electric power system.
Background technology
Indoor box metal enclosed ring main unit is applicable to the electric power system ring network power supply; control and protective device in terminal power supply or the biradial electric power system; generally by housing; on-load switch; circuit breaker; current transformer; earthed switch; bus-bar room; the control room; branch's busbar; stube cable is formed; bus in the bus-bar room is connected the high pressure inlet wire with the on-load switch fixed contact; the moving contact of on-load switch is connected with the fixed contact of circuit breaker by branch's busbar; the moving contact of circuit breaker is connected with a cable by connecting busbar; connecting installation electric current mutual inductance on the busbar; transducer and earthed switch, the on off state of its on-load switch and earthed switch can manually be controlled by handle hole.Subject matter is: existing indoor box metal enclosed ring main unit, the shortest creepage distance between the fixed contact of on-load switch and moving contact and the metal installing rack is 240mm, phase spacing is 210mm, its class of insulation is low, the electric power system of 12KV electric pressure can only be suitable for, and the high-voltage electric power system of 24KV electric pressure can not be suitable for.
Summary of the invention
The purpose of this utility model is the deficiency that exists at prior art, and a kind of class of insulation height is provided, and is suitable for the box metal enclosed ring main unit of indoor high-voltage of 24KV electric pressure.
The technical solution of the utility model comprises shell, bus-bar room, main switch, the cable vault, operating room, the control room, fuse, earthed switch, current transformer, stube cable, main switch is the sulphur hexafluoride on-load switch, bus in the bus-bar room is connected with the on-load switch fixed contact, the on-load switch moving contact is connected with fuse, fuse is connected with cable by branch's busbar, on branch's busbar current transformer is installed, transducer and earthed switch, mainly be to be provided with the bellows insulator on the on-load switch fixed contact, this bellows insulator upper end to the distance of the surface creepage between the metal installing rack is 480mm; Following exterior surface in on-load switch moving contact lower end is provided with the multi-layer annular insulated gate, makes on-load switch moving contact to the distance of the surface creepage between the metal installing rack be 480mm; Spaced apart between the adjacent two-phase is 275mm.
The utility model has the advantages that on-load switch fixed contact, moving contact are 480mm to the distance of the surface creepage between the metal installing rack, the spaced apart between the adjacent two-phase is 275mm, and its class of insulation height can be used in the high pressure electrical power trans mission/distribution system of 24KV electric pressure.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Embodiment
The box metal enclosed ring main unit of indoor high-voltage as shown in Figure 1 comprises shell 1, bus-bar room A, main switch B, the C of cable vault, operating room D, control room 8, fuse 6, earthed switch 4, current transformer, stube cable 2.Main switch B is an on-load switch, fills sulphur hexafluoride in this on-load switch housing, and its housing is formed by poured with epoxy resin.Bus in the bus-bar room A is connected with the on-load switch fixed contact, and the on-load switch moving contact is connected with fuse 6, and fuse 6 is connected with cable 2 by branch's busbar 3, and current transformer, transducer 5 and earthed switch 4 are installed on branch's busbar 3.On the on-load switch fixed contact, be provided with bellows insulator 13, these bellows insulator 13 upper ends to the distance of the surface creepage between the metal installing rack 14 is 480mm, following exterior surface in on-load switch moving contact lower end is provided with multi-layer annular insulated gate 10, make on-load switch moving contact to the distance of the surface creepage between the metal installing rack 14 be 480mm, improve the class of insulation between on-load switch and the metal installing rack 14.Spaced apart between the adjacent two-phase is 275mm, improves the class of insulation between the adjacent two-phase.Earthed switch 4, fuse 6 are connected by the interior operating mechanism of action bars 7, tripping mechanism 9 and operating room D respectively.On the instrument door of control room 8 electrification display 11 is housed, housing 1 bottom is equipped with ground connection busbar 12, guarantees device security ground connection.
Claims (1)
1. box metal enclosed ring main unit of indoor high-voltage, comprise shell (1), bus-bar room A, main switch B, the C of cable vault, operating room D, control room (8), fuse (6), earthed switch (4), current transformer, stube cable (2), main switch B is the sulphur hexafluoride on-load switch, bus in the bus-bar room A is connected with the on-load switch fixed contact, the on-load switch moving contact is connected with fuse (6), fuse (6) is connected with cable (2) by branch's busbar (3), and branch's busbar (3) is gone up current transformer, transducer (5) and earthed switch (4) are installed; It is characterized in that being provided with on the on-load switch fixed contact bellows insulator (13), this bellows insulator (13) upper end to the distance of the surface creepage between the metal installing rack (14) is 480mm; Following exterior surface in on-load switch moving contact lower end is provided with multi-layer annular insulated gate (10), makes on-load switch moving contact to the distance of the surface creepage between the metal installing rack (14) be 480mm; Spaced apart between the adjacent two-phase is 275mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201903804U CN201490611U (en) | 2009-08-03 | 2009-08-03 | Indoor high-voltage tank type metal closed ring main unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201903804U CN201490611U (en) | 2009-08-03 | 2009-08-03 | Indoor high-voltage tank type metal closed ring main unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201490611U true CN201490611U (en) | 2010-05-26 |
Family
ID=42429478
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201903804U Expired - Fee Related CN201490611U (en) | 2009-08-03 | 2009-08-03 | Indoor high-voltage tank type metal closed ring main unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201490611U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102097173A (en) * | 2011-03-21 | 2011-06-15 | 江苏江城电气有限公司 | Energy-saving and environment-friendly high-voltage closed bus |
-
2009
- 2009-08-03 CN CN2009201903804U patent/CN201490611U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102097173A (en) * | 2011-03-21 | 2011-06-15 | 江苏江城电气有限公司 | Energy-saving and environment-friendly high-voltage closed bus |
| CN102097173B (en) * | 2011-03-21 | 2012-07-11 | 江苏江城电气有限公司 | Energy-saving and environment-friendly high-voltage closed bus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| 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: 20100526 Termination date: 20160803 |