CN105742034A - Medium-low voltage lead-out sleeve for capacitor voltage transformer - Google Patents
Medium-low voltage lead-out sleeve for capacitor voltage transformer Download PDFInfo
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- CN105742034A CN105742034A CN201410758176.3A CN201410758176A CN105742034A CN 105742034 A CN105742034 A CN 105742034A CN 201410758176 A CN201410758176 A CN 201410758176A CN 105742034 A CN105742034 A CN 105742034A
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- conducting rod
- low voltage
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- casting body
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Abstract
The invention relates to a medium-low voltage lead-out sleeve for a capacitor voltage transformer. The medium-low voltage lead-out sleeve comprises a medium-voltage conducting rod and a low-voltage conducting rod, wherein the medium-voltage conducting rod and the low-voltage conducting rod are integrated into a sleeve in a same casting body; the shape of the casting body is designed according to the size and the shape of an installation space; bosses are formed in the periphery of the middle part of the casting body; the medium-voltage conducting rod and the low-voltage conducting rod are provided with textures capable of strengthening the adhesive force of the casting body; and a metal coating is arranged on the surface of the casting body. The lead-out sleeve is cast in a high vacuum condition; presence of bubbles in the casting body is avoided; the insulating property is good; metal spraying treatment is carried out on the surface of the casting body; equivalently, a grading ring is added to the surface of the sleeve; the electric field distribution at the position is balanced; the partial discharge capacity of a product is reduced; an integral structure is achieved; one sleeve is omitted; and the producing and manufacturing cost is reduced.
Description
Technical field
The present invention relates to a kind of transformer manufacturing technology, specifically a kind of capacitance type potential transformer mesolow extraction tube.
Background technology
Capacitance type potential transformer is made up of capacitive divider and electromagnetic unit two parts, and according to product operation logic, capacitive divider and electromagnetic unit need to be electrically connected reliably；Electrical connection includes middle pressure and connects and low pressure connection, it is necessary to be incorporated into inside electromagnetic unit by sleeve pipe by the mesolow signal of capacitive divider, thus realizing the electric property of product；Further, since middle pressure junction is high potential, good electrical insulation properties is very crucial, will directly affect the partial discharge performance of product.
Currently used low-tension bushing structure is split absolute construction, namely the connection of signal and low-voltage signal is pressed in needing two individual jackets to realize respectively, sleeve pipe is hollow-core construction, inside is filled with insulating oil, structure is complicated and owing to the dipping effect of insulating oil affects product electric property, product partial discharge quantity is bigger.
Summary of the invention
Complicated and affect the weak points such as product electric property due to the dipping effect of insulating oil for prior art mesolow sleeve structure, the technical problem to be solved in the present invention is to provide one and is cast in that same pour mass is interior, the uniform capacitance type potential transformer mesolow extraction tube of Electric Field Distribution.
For solving above-mentioned technical problem, the technical solution used in the present invention is:
One capacitance type potential transformer mesolow extraction tube of the present invention, has middle pressure conducting rod and low voltage conductive bar, medium pressure conducting rod and low voltage conductive bar and is integrated into a sleeve pipe in same pour mass.
Described pour mass shape designs according to size and the shape of installing space, and in the middle part of pour mass, periphery has boss；Medium pressure conducting rod and low voltage conductive bar have the texture that can increase pour mass strong adhesive force；Described pour mass surface has metal coating；Lift one's head in the upper end of medium pressure conducting rod and the upper end of low voltage conductive bar lift one's head between the projection that formed for pour mass；Described low voltage conductive bar is bending structure inside pour mass, lifts one's head the insulation distance that the lower end with middle pressure conducting rod lifts one's head and increase in its lower end.
The invention have the advantages that and advantage:
1. sleeve pipe of the present invention is poured into a mould under a high vacuum, it is to avoid the existence of pour mass air entrapment, good insulation preformance；Pour mass surface carries out metal spraying process, is equivalent to install grading ring additional at sleeve surface, the uniform Electric Field Distribution at this place, decreases the partial discharge quantity of product；
2. middle pressure conducting rod and low voltage conductive bar are cast in same pour mass by the present invention, it is achieved that integral structure, eliminate a sleeve pipe, reduce manufacturing cost.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention；
Wherein: 1 is middle pressure conducting rod, and 2 is low voltage conductive bar, and 3 is pour mass, and 4 is metal coating.
Detailed description of the invention
Below in conjunction with Figure of description, the present invention is further elaborated.
As it is shown in figure 1, one capacitance type potential transformer mesolow extraction tube of the present invention, there is the middle pressure conducting rod 1 same pour mass 3 of low voltage conductive bar 2 medium pressure conducting rod 1 low voltage conductive bar 2 and be integrated into a sleeve pipe.
Pour mass shape designs according to size and the shape of installing space, and in the middle part of pour mass, periphery has boss.
Medium pressure conducting rod 1 low voltage conductive bar 2 has the texture that can increase pour mass strong adhesive force.
Described pour mass 3 surface has metal coating 4.
Lift one's head in the upper end of medium pressure conducting rod 1 and the upper end of low voltage conductive bar 2 lift one's head between the projection that formed for pour mass 3.
Described low voltage conductive bar 2 is bending structure inside pour mass 3, lifts one's head the insulation distance that the lower end with middle pressure conducting rod 1 lifts one's head and increase in its lower end.
In the present embodiment, the upper end of pour mass 3 is arranged on the capacitive divider base plate of capacitance type potential transformer, and seals against connection；Medium pressure conducting rod 1, low voltage conductive bar 2 one end are connected with potentiometer, and the other end is connected with electromagnetic unit.
Middle pressure conducting rod 1 and low voltage conductive bar 2, it is cast in inside same pour mass 3 under high vacuum state, inside pipe casing bubble-free exists, and for ensureing cast effect, middle pressure conducting rod 1 and low voltage conductive bar 2 all process through embossing, guarantee the adhesive force of conducting rod and pour mass 3, thus ensureing electrically to be reliably connected.
Owing to middle pressure conducting rod 1 is high potential, pour mass 3 surface carries out metal coating process, to shield high potential, and uniformly this place's Electric Field Distribution.
Boss peripheral in the middle part of pour mass plays the effect of adpting flange, and it crimps with the cushion rubber of capacitive divider base plate when mounted, has good sealing function.
The projection that pour mass 3 is formed is supported on the base of capacitive divider, owing to this projection is between lifting one's head in the upper end of middle pressure conducting rod 1 and lifts one's head in the upper end of low voltage conductive bar 2, simultaneously works as the effect of reinforced insulation.
Capacitance type potential transformer is made up of capacitive divider and electromagnetic unit two parts, and when product runs, capacitive divider and electromagnetic unit need to be electrically connected reliably；Electrical connection includes middle pressure and connects and low pressure connection, it is necessary to be incorporated into inside electromagnetic unit by sleeve pipe by the mesolow signal of capacitive divider, thus realizing the electric property of product.
In Product Assembly process, capacitance type potential transformer mesolow extraction tube of the present invention is installed on capacitive divider base plate, centre has O-ring seal to ensure sealing property, and middle pressure conducting rod and low voltage conductive bar one end are connected with potentiometer, and the other end is connected with electromagnetic unit.Electrical connection is reliable, and partial discharge performance is good, and installs simple.
Claims (6)
1. a capacitance type potential transformer mesolow extraction tube, has middle pressure conducting rod and low voltage conductive bar, it is characterised in that: medium pressure conducting rod and low voltage conductive bar are integrated into a sleeve pipe in same pour mass.
2. by the capacitance type potential transformer mesolow extraction tube described in claim 1, it is characterised in that: described pour mass shape designs according to size and the shape of installing space, and in the middle part of pour mass, periphery has boss.
3. by the capacitance type potential transformer mesolow extraction tube described in claim 1, it is characterised in that: medium pressure conducting rod and low voltage conductive bar have the texture that can increase pour mass strong adhesive force.
4. by the capacitance type potential transformer mesolow extraction tube described in claim 1, it is characterised in that: described pour mass surface has metal coating.
5. by capacitance type potential transformer mesolow extraction tube described in claim 1, it is characterised in that: lift one's head in the upper end of medium pressure conducting rod and the upper end of low voltage conductive bar lift one's head between for the projection of pour mass formation.
6. by capacitance type potential transformer mesolow extraction tube described in claim 1, it is characterised in that: described low voltage conductive bar be bending structure inside pour mass, and the insulation distance increase lifted one's head in the lower end with middle pressure conducting rod is lifted one's head in its lower end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410758176.3A CN105742034A (en) | 2014-12-10 | 2014-12-10 | Medium-low voltage lead-out sleeve for capacitor voltage transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410758176.3A CN105742034A (en) | 2014-12-10 | 2014-12-10 | Medium-low voltage lead-out sleeve for capacitor voltage transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105742034A true CN105742034A (en) | 2016-07-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410758176.3A Pending CN105742034A (en) | 2014-12-10 | 2014-12-10 | Medium-low voltage lead-out sleeve for capacitor voltage transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105742034A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4074193A (en) * | 1973-12-20 | 1978-02-14 | Siemens Aktiengesellschaft | Combined current and voltage measuring apparatus |
| CN201741563U (en) * | 2010-07-22 | 2011-02-09 | 无锡市锡容电力电器有限公司 | Integrated output terminal structure of capacitive divider |
| CN203894304U (en) * | 2014-06-26 | 2014-10-22 | 山东泰开互感器有限公司 | Novel low-voltage integrated tapping sleeve in capacitor voltage transformer |
| CN204257359U (en) * | 2014-12-10 | 2015-04-08 | 特变电工康嘉(沈阳)互感器有限责任公司 | Capacitance type potential transformer mesolow extraction tube |
-
2014
- 2014-12-10 CN CN201410758176.3A patent/CN105742034A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4074193A (en) * | 1973-12-20 | 1978-02-14 | Siemens Aktiengesellschaft | Combined current and voltage measuring apparatus |
| CN201741563U (en) * | 2010-07-22 | 2011-02-09 | 无锡市锡容电力电器有限公司 | Integrated output terminal structure of capacitive divider |
| CN203894304U (en) * | 2014-06-26 | 2014-10-22 | 山东泰开互感器有限公司 | Novel low-voltage integrated tapping sleeve in capacitor voltage transformer |
| CN204257359U (en) * | 2014-12-10 | 2015-04-08 | 特变电工康嘉(沈阳)互感器有限责任公司 | Capacitance type potential transformer mesolow extraction tube |
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Application publication date: 20160706 |