CN203721471U - Removable current transformer - Google Patents
Removable current transformer Download PDFInfo
- Publication number
- CN203721471U CN203721471U CN201320826825.XU CN201320826825U CN203721471U CN 203721471 U CN203721471 U CN 203721471U CN 201320826825 U CN201320826825 U CN 201320826825U CN 203721471 U CN203721471 U CN 203721471U
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- CN
- China
- Prior art keywords
- pour mass
- rubber sleeve
- current transformer
- silicone rubber
- conical
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- 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 discloses a removable current transformer, and aims to solve the problems of long power failure time of a system and influence on the environment due to gas operation performed by opening a gas-filled compartment during replacement of a current transformer in the prior art. The removable current transformer is characterized by being an epoxy resin transformer casting body consisting of one rectangular casting body, two cylindrical casting bodies and two conical casting bodies, wherein an aluminum ground shell is arranged on the outer surface of the rectangular casting body; a fixed flange is arranged outside the cylindrical casting body; a silicon rubber sleeve is arranged outside the conical casting body; a potential shielding layer is formed by spraying a conductive adhesive at a contact position between the silicon rubber sleeve and a silicon rubber sleeve support ring; the lower end of a disposable copper conductor is fixedly connected with a conductive contact through a screw. The removable current transformer has the beneficial effects that during use, the removable current transformer is directly inserted into an inner conical bush of a gas insulating metal enclosed switching equipment to form a removable connecting structure, the power failure time of the system is short during replacement, and gas operation is not involved. The removable current transformer is safe and environment-friendly and can be disassembled and replaced rapidly, energy is saved, and the shell is touchable.
Description
Technical field
The utility model belongs to current transformer technical field, particularly for a kind of plug-in current transformer of 72.5kV Cubicle Gas-Insulated Switchgear.
Background technology
In prior art, Cubicle Gas-Insulated Switchgear (being called for short C-GIS) current transformer used is divided into two kinds, and a kind of is to be directly socketed on a cable, and another kind is mounted in the charging compartment inside of C-GIS.Above-mentioned two kinds of current transformers respectively have the pluses and minuses of oneself.Directly being socketed in a current transformer on cable is low-pressure type instrument transformer, do not need to bear insulation stress and thermal stress, shell is tangible, safe, but be subject to the restriction of itself structure, the secondary output capacity of this instrument transformer is little, with national grid require incompatible, it is 30 volt-amperes that national grid requires secondary output capacity minimum, and this instrument transformer secondary output capacity maximum also can only reach 15 volt-amperes in Practical Project, so can not meet instructions for use, and while changing, need to untie being connected of cable and major loop, the system blackout time is longer, to electric power system operation continuity, impact larger, be arranged on the current transformer of the charging compartment of C-GIS, secondary output capacity is larger, can realize the large capacity of little no-load voltage ratio, but this instrument transformer need to bear insulation stress and thermal stress, and be connected with major loop by plate binding post, during replacing, need to open charging compartment, also need the interruption duration grown, especially need to carry out gas-operated, if what be filled with in charging compartment is the such greenhouse gases of SF6, can impact environment.
Summary of the invention
Problem to be solved in the utility model is, overcome the deficiencies in the prior art and defect, provide a kind of and can meet the requirement of national grid to secondary output capacity, during replacing without untiing cable one time, shell safety is tangible, and does not relate to a kind of plug-in current transformer of gas-operated.
The technical solution adopted in the utility model comprises copper conductor and secondary winding, by 1 rectangle pour mass, 2 cylindrical pour mass and 2 conical pour mass form epoxy resin instrument transformer pour mass, copper conductor and secondary winding are installed in this epoxy resin instrument transformer pour mass, the aluminium shell of ground connection is installed at the outer surface of described rectangle pour mass, at described cylindrical pour mass, mounting flange is installed outward, in described conical pour mass outside, silicone rubber sleeve is installed, in silicone rubber sleeve upper end, outer set is equipped with silicone rubber sleeve support ring, at the contact site of described silicone rubber sleeve and silicone rubber sleeve support ring spraying conducting resinl, form earth potential screen, between described conical pour mass and silicone rubber sleeve, form the first annular interface, a described copper conductor lower end is fixedly connected with conductive contact by screw.
On described epoxy resin instrument transformer pour mass, be provided with lifting inserts.
The lower surface 1-2mm of conical pour mass is extended in the lower surface of at least in one plane or the copper conductor in the lower surface of a described copper conductor and the lower surface of conical pour mass.
Compared with prior art, the utility model solved current transformer at secondary output capacity, shell is tangible and be connected with major loop by plate binding post, during replacing, need to open charging compartment, interruption duration that need to be longer, especially need to carry out the problem that gas-operated exerts an influence to environment, specifically there is following beneficial effect:
(1) the utility model due to by increasing by 2 cylindrical pour mass and 2 conical pour mass and pouring into an epoxy resin integral on epoxy resin instrument transformer pour mass, on 2 conical pour mass, be socketed silicone rubber sleeve and silicone rubber sleeve support ring, and form earth potential screen at silicone rubber sleeve and silicone rubber sleeve support ring contact site spraying conducting resinl, during use, be directly plugged in the inner cone sleeve pipe of Cubicle Gas-Insulated Switchgear, form plug-in type connection structure, between conical pour mass and silicone rubber sleeve, form the first annular interface, between silicone rubber sleeve and interior vertebra sleeve pipe, form the second annular interface, two annular interfaces utilize the Incoercibility of silicone rubber sleeve and flowable on interface, to produce pressure, get rid of the air in interface, thereby form interface insulation, during replacing without untiing cable one time, do not need to open charging compartment, therefore do not relate to gas-operated, avoided opening the problem that charging compartment can impact environment.
(2) electric conductor in 2 conical pour mass of the utility model is realized and being electrically connected to an of major loop by spring touch finger, the epoxy resin outer surface of epoxy resin instrument transformer pour mass forms ground plane by spraying conducting resinl, and adopt the aluminium shell seal of ground connection, in system running, current transformer casing is tangible, safe and reliable.
(3) when the utility model is used, be directly plugged in the inner cone sleeve pipe of Cubicle Gas-Insulated Switchgear, form plug-in type connection structure, disassembling, assembling and replacing is fast, and in the upper end of instrument transformer, be provided with lifting inserts, be convenient to fast large-scale current transformer be carried out to disassembling, assembling and replacing, reduced the interruption duration of system.
Accompanying drawing explanation
Fig. 1 is front view of the present utility model,
Fig. 2 is the main pseudosection of the utility model,
Fig. 3 is the A-A profile of Fig. 1,
Fig. 4 is the B-B cutaway view of Fig. 1.
In figure:
1. epoxy resin instrument transformer pour mass,
1-1. rectangle pour mass, the cylindrical pour mass of 1-2.,
The conical pour mass of 1-3.,
2. aluminium shell, a 3. copper conductor,
4. mounting flange, 5. silicone rubber sleeve support ring,
6. silicone rubber sleeve, 7. inner cone sleeve pipe,
8. conductive contact, 9. electric conductor,
10. spring touch finger, 11 sleeve pipe fixed heads,
12. secondary winding, 13. lifting inserts.
Embodiment
Embodiment 1
As shown in drawings, the utility model comprises copper conductor 3 and secondary winding 12, by 1 rectangle pour mass 1-1, 2 cylindrical pour mass 1-2 and 2 conical pour mass 1-3 form epoxy resin instrument transformer pour mass 1, be that described epoxy resin instrument transformer pour mass 1 is by 1 rectangle pour mass 1-1, 2 epoxy resin integrals that cylindrical pour mass 1-2 utilizes vacuum pouring die casting to become with 2 conical pour mass 1-3, 6 epoxy resin outer surface spraying conducting resinls at described rectangle pour mass 1-1, and be inwardly provided with threaded insert, by sunk screw, be fixedly connected with the aluminium shell 2 of the aluminium sheet formation instrument transformer ground connection that 4mm is thick, in copper conductor 3 of the interior installation of described epoxy resin instrument transformer pour mass 1 and secondary winding 12, at described cylindrical pour mass 1-2, mounting flange 4 is installed outward, in described conical pour mass 1-3 outside, silicone rubber sleeve 6 is installed, this silicone rubber sleeve 6 adopts rubber vulcanization process, utilize Mould Machining to make, in silicone rubber sleeve 6 upper end outer set, silicone rubber sleeve support ring 5 is housed, at described silicone rubber sleeve 6 and the contact site spraying conducting resinl of silicone rubber sleeve support ring 5, form earth potential screen, between described conical pour mass 1-3 and silicone rubber sleeve 6, form the first annular interface, the lower surface 1-2mm of conical pour mass 1-3 is extended in the lower surface of at least in one plane or the copper conductor 3 in lower surface of the lower surface of a described copper conductor 3 and conical pour mass 1-3, one time copper conductor 3 lower ends are fixedly connected with conductive contact 8 by screw.
During use, the utility model by being connected with inner cone sleeve pipe 7 with the sleeve pipe fixed head 11 on gas tank with screw on mounting flange 4, described silicone rubber sleeve 6 cooperatively interacts with the earth potential screen of the contact site spraying conducting resinl formation of silicone rubber sleeve support ring 5 and the earth shield net in inner cone sleeve pipe 7, form the earth potential shielding of whole assembly structure, between described silicone rubber sleeve 6 and taper pour mass 1-3 and inner cone sleeve pipe 7, form plug-in structure, and between conical pour mass 1-3 and silicone rubber sleeve 6, form the first annular interface, between silicone rubber sleeve 6 and inner cone sleeve pipe 7, form the second annular interface, two annular interfaces utilize Incoercibility and the flowable of silicone rubber sleeve 6, on two interfaces, produce pressure, get rid of the air in interface, thereby form interface insulation, a described copper conductor 3 is fixedly connected with conductive contact 8 by screw, and conductive contact 8 outer surfaces are realized electrical connection by spring touch finger 10 and the electric conductor 9 of interior vertebra sleeve pipe 7 inside.During installation or removal instrument transformer, unload the screw on mounting flange 4, instrument transformer can be removed with the sleeve pipe fixed head 11 on gas tank and be connected with inner cone sleeve pipe 7, thereby reduce electric power system because install or change the interruption duration that instrument transformer produces, in whole operating process, do not need to open charging compartment, so do not relate to gas-operated, without greenhouse gas emission, thereby avoided the impact on environment.
Embodiment 2
Identical with embodiment 1, difference is to be provided with lifting inserts 13 on described epoxy resin instrument transformer pour mass 1, to facilitate, large-scale current transformer is lifted, during installation or removal instrument transformer, unload the screw on mounting flange 4, instrument transformer can be removed with the sleeve pipe fixed head 11 on gas tank and be connected with inner cone sleeve pipe 7, utilize hanging device and lift being connected of inserts 13, can realize the plug of instrument transformer, thereby reduce electric power system because install, change the interruption duration that instrument transformer produces, in whole operating process, do not need to open charging compartment, so do not relate to gas-operated, without greenhouse gas emission, thereby avoided the impact on environment.
Claims (3)
1. a plug-in current transformer, comprise a copper conductor (3) and secondary winding (12), it is characterized in that, by 1 rectangle pour mass (1-1), 2 cylindrical pour mass (1-2) and 2 conical pour mass (1-3) form epoxy resin instrument transformer pour mass (1), a copper conductor (3) and secondary winding (12) are installed in this epoxy resin instrument transformer pour mass (1), the aluminium shell (2) of ground connection is installed at the outer surface of described rectangle pour mass (1-1), mounting flange (4) is installed outside described cylindrical pour mass (1-2), in described conical pour mass (1-3) outside, silicone rubber sleeve (6) is installed, in silicone rubber sleeve (6) upper end, outer set is equipped with silicone rubber sleeve support ring (5), at described silicone rubber sleeve (6) and the contact site spraying conducting resinl of silicone rubber sleeve support ring (5), form earth potential screen, between described conical pour mass (1-3) and silicone rubber sleeve (6), form the first annular interface, a described copper conductor (3) lower end is fixedly connected with conductive contact (8) by screw.
2. a kind of plug-in current transformer according to claim 1, is characterized in that, is provided with lifting inserts (13) on described epoxy resin instrument transformer pour mass (1).
3. a kind of plug-in current transformer according to claim 1, it is characterized in that, the lower surface 1-2mm of conical pour mass (1-3) is extended in the lower surface of at least in one plane or the copper conductor in lower surface (3) of the lower surface of a described copper conductor (3) and conical pour mass (1-3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320826825.XU CN203721471U (en) | 2013-12-16 | 2013-12-16 | Removable current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320826825.XU CN203721471U (en) | 2013-12-16 | 2013-12-16 | Removable current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203721471U true CN203721471U (en) | 2014-07-16 |
Family
ID=51160609
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320826825.XU Expired - Fee Related CN203721471U (en) | 2013-12-16 | 2013-12-16 | Removable current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203721471U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103632827A (en) * | 2013-12-16 | 2014-03-12 | 沈阳华德海泰电器有限公司 | Plug type current transformer |
| CN108475577A (en) * | 2015-12-18 | 2018-08-31 | Abb瑞士股份有限公司 | Current transformer for high voltage gas insulated switchgear substation |
-
2013
- 2013-12-16 CN CN201320826825.XU patent/CN203721471U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103632827A (en) * | 2013-12-16 | 2014-03-12 | 沈阳华德海泰电器有限公司 | Plug type current transformer |
| CN108475577A (en) * | 2015-12-18 | 2018-08-31 | Abb瑞士股份有限公司 | Current transformer for high voltage gas insulated switchgear substation |
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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 |
Granted publication date: 20140716 Termination date: 20201216 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |