CN207586267U - A kind of insulation crust of electronic voltage transducer - Google Patents
A kind of insulation crust of electronic voltage transducer Download PDFInfo
- Publication number
- CN207586267U CN207586267U CN201721766214.5U CN201721766214U CN207586267U CN 207586267 U CN207586267 U CN 207586267U CN 201721766214 U CN201721766214 U CN 201721766214U CN 207586267 U CN207586267 U CN 207586267U
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- China
- Prior art keywords
- shell
- wall
- metallic shield
- side wall
- outside
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Abstract
The utility model provides a kind of insulation crust of electronic voltage transducer, cylindrical insulation shell of the shell for no bottom wall, the outside of side wall of outer shell is full skirt shape structure, the inside of side wall of outer shell is nonplanar structure, the interior outside of shell upper wall is planar structure, and is provided with to install the first through hole of inserted sheet metal on shell upper wall；Upper metallic shield is equipped in the space that the outside of shell upper wall and side wall upper part point and the inside of shell upper wall and side wall upper part point are surrounded, upper metallic shield upper wall is provided with the second through-hole passed through to inserted sheet metal；Lower metallic shield is equipped in the space surrounded on the outside of side wall of outer shell lower part with inside, upper metallic shield is not contacted with lower metallic shield.The housing interior side-wall of the utility model uses nonplanar structure, increases creepage distance of the internal high pressure end to low-pressure end, it is ensured that terminal installation is protected not impacted by high voltage.
Description
Technical field
The utility model is related to electronic sensor technical field more particularly to a kind of insulation of electronic voltage transducer
Shell.
Background technology
Application of the electronic mutual inductor in terms of a secondary device fusion at present is mainly " to use resistance-capacitance type voltage sensor
+ iron-core coil low power consumption current mutual inductor ".Wherein, its essence of electronic voltage transducer is capacitance or electric resistance partial pressure.
Electronic voltage transducer need to pass through accuracy test, the experiment of exchange withstanding voltage, partial discharge test, thunder and lightning punching
Voltage test, ratio difference and phase difference experiment, the experiment of cable withstanding voltage, high/low temperature cyclic test etc. are hit, wherein high/low temperature is followed
The temperature range of ring test is -40 to 70 degree, and range of temperature is big, needs the insulation crust of electronic sensor and interior thus
Portion's insulating dielectric materials can sustain this large-scale temperature change, and phenomena such as do not crack.Due to 10kV electronic types electricity
Pressure sensor will the industrial frequency withstand voltage through 42kV after one minute, the all-wave lightning impulse of 75kV, 85kV's blocks lightning impulse；20kV
Electronic voltage transducer will the industrial frequency withstand voltage through 65kV after one minute, the all-wave lightning impulse of 125kV, 140kV's blocks thunder
Surge etc., therefore the insulation performance of sensor outer housing needs stringent design, need to withstand the impact of these test voltages.
General electronic voltage transducer insulation crust, housing exterior employ umbrella-skirt type to increase creepage distance
Curved-surface structure, enclosure then employ smooth structure, bring a problem in this way, when after high/low temperature cyclic test, such as
Fruit shell and the rising-heat contracting-cold characteristic of built-in electrical insulation dielectric material are inconsistent, then break-off can occur for the two, hold therebetween
It is also easy to produce gap.If generating gap, the high voltage of high-pressure side is easy to puncture to low-pressure side by gap, so as to damage low pressure
The equipment such as side protection terminal.
In view of this, it would be highly desirable to which R ＆ D design goes out a kind of electronic voltage transducer insulation crust for avoiding above-mentioned drawback.
Utility model content
The purpose of this utility model aims to solve the problem that the above problem, so as to provide outside a kind of insulation of electronic voltage transducer
Shell.
To achieve the above object, the utility model provides a kind of insulation crust of electronic voltage transducer.It is described outer
Cylindrical insulation shell of the shell for no bottom wall, the outside of the side wall of outer shell are full skirt shape structure, the inside of the side wall of outer shell
For nonplanar structure, the interior outside of shell upper wall is planar structure, and is provided with to install inserted sheet metal on shell upper wall
First through hole；The sky that the outside of the shell upper wall and side wall upper part point and the inside of shell upper wall and side wall upper part point are surrounded
Interior to be equipped with upper metallic shield, the upper metallic shield upper wall is provided with the second through-hole passed through to inserted sheet metal；It is described
Be equipped with lower metallic shield in the space surrounded with inside on the outside of side wall of outer shell lower part, the upper metallic shield and it is described under
Metallic shield does not contact.
Preferably, the inside sidewalls are step structure.
Preferably, the inside sidewalls are full skirt shape structure.
Preferably, the inside sidewalls are polyline shaped structure.
Preferably, the height of the upper metallic shield and lower metallic shield is less than the half of outer cover height.
The beneficial effects of the utility model：
（1）Other than lateral wall is using the curved-surface structure of umbrella-skirt type, madial wall also uses non-the shell of the utility model
Planar structure.Madial wall uses nonplanar structure, it is possible to increase creepage distance of the internal high pressure end to low-pressure end, even if in shell
Break-off has occurred by thermocycling with built-in electrical insulation medium in wall, since internal creepage distance is sufficiently large, will not send out
The phenomenon that raw voltage is from high-pressure side breakdown to low-pressure end, so as to ensure that terminal installation is protected not impacted by high voltage.
（2）The shell of the utility model in order to play the interference of anti-peripheral electromagnetic field and shield ambient stray capacitance shadow
It ringing, metallic shield is provided in insulation crust, upper metallic shield can partly compensate the stray capacitance over the ground of divider,
Reduce partial pressure ratio error, because the stray capacitive currents flowed to from high-pressure side between divider ontology can be partly compensated by bulk flow
To the stray capacitive currents on ground.Lower metallic shield can inhibit the stray capacitance over the ground of divider, also have suppression to stray capacitance
It makes and uses.Due to being metallic shield, so as to there is certain shielding action to the surrounding space interference of electromagnetic field.
Description of the drawings
Fig. 1 is the cross-section structure of the insulation crust of a kind of electronic voltage transducer that the utility model embodiment one provides
Schematic diagram；
Fig. 2 is the cross-section structure of the insulation crust of a kind of electronic voltage transducer that the utility model embodiment two provides
Schematic diagram；
Fig. 3 is the cross-section structure of the insulation crust of a kind of electronic voltage transducer that the utility model embodiment three provides
Schematic diagram；
Fig. 4 is the structure diagram of upper shielding case that the utility model embodiment provides；
Fig. 5 is the structure diagram of lower shielding case that the utility model embodiment provides.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with utility model
Attached drawing in embodiment is clearly and completely described the technical solution in utility model embodiment, it is clear that retouched below
The embodiment stated is only utility model part of the embodiment, and not all embodiment.Based on the embodiment in utility model,
All other embodiment that those of ordinary skill in the art are obtained without making creative work, belongs to practicality
Novel protected range.
Fig. 1 is the cross-section structure of the insulation crust of a kind of electronic voltage transducer that the utility model embodiment one provides
Schematic diagram.
As shown in Figure 1, a kind of insulation crust of electronic voltage transducer provided in this embodiment.Including being equipped with glass fibers
Tie up the insulation crust of material, cylindrical housings of the shell for no bottom wall.The outside 1.1 of side wall of outer shell 1 is full skirt shape structure.Outside
The inside 1.2 of shell side wall 1 is nonplanar structure, which is the step structure in Fig. 1.The inside of shell upper wall 2
2.1 and outside 2.2 be planar structure, and be provided with to install the first through hole 2.3 of inserted sheet metal on shell upper wall 1.
Madial wall uses step structure, it is possible to increase creepage distance of the internal high pressure end to low-pressure end, even if in shell
Break-off has occurred by thermocycling with built-in electrical insulation medium in wall, since internal creepage distance is sufficiently large, will not send out
The phenomenon that raw voltage is from high-pressure side breakdown to low-pressure end, so as to ensure that terminal installation is protected not impacted by high voltage.
Creepage distance refers between two conductive devices measured along insulating surface or between conductive devices and equipment interface
The shortest distance, increase the effective method of creepage distance be increase electric conductor between along face length.
The sky that the inside of the outside of part and part on shell upper wall 1 and side wall 2 is surrounded on shell upper wall 1 and side wall 2
It is interior to be equipped with upper metallic shield 3.The structure of upper metallic shield 3 can be found in Fig. 4, as shown in figure 4, upper metallic shield 3 is
Cylindrical and without bottom wall, upper wall is provided with the second through-hole 3.1 passed through to inserted sheet metal.Upper metallic shield 3 can part
The stray capacitance over the ground of housing internal voltage divider is compensated, reduces partial pressure ratio error, because between high-pressure side flows to divider ontology
Stray capacitive currents can be compensated partly by the stray capacitive currents on ontology flow direction ground.
On the outside of 1 lower part of side wall of outer shell lower metallic shield 4 is equipped in 1.1 spaces surrounded with inside 1.2.Lower metal screen
The structure for covering cover 4 can be found in Fig. 5, as shown in figure 5, cylinder of the lower metallic shield 4 for no upper wall and bottom wall.Lower metallic shield
Cover can inhibit the stray capacitance over the ground of divider, also have inhibiting effect to stray capacitance.
Wherein, upper metallic shield 3 is not contacted with lower metallic shield 4.Upper metallic shield 3 and lower metallic shield 4
Height be less than outer cover height half.In addition, due to being upper metallic shield 3 and lower metallic shield 4 is metallic shield
Cover, therefore have certain shielding action to the surrounding space interference of electromagnetic field.
Fig. 2 is the cross-section structure of the insulation crust of a kind of electronic voltage transducer that the utility model embodiment two provides
Schematic diagram.
As shown in Fig. 2, a kind of insulation crust of electronic voltage transducer provided in this embodiment and above-described embodiment are not
With the inside of side wall of outer shell 1 is the full skirt shape structure identical with outboard structure.
The inside of side wall of outer shell 1 uses full skirt shape structure, it is possible to increase creepage distance of the internal high pressure end to low-pressure end, i.e.,
Make outer casing inner wall that break-off have occurred by thermocycling with built-in electrical insulation medium, since internal creepage distance is sufficiently large,
The phenomenon that voltage is from high-pressure side breakdown to low-pressure end will not occur, so as to ensure that terminal installation is protected not rushed by high voltage
It hits.
Fig. 3 is the cross-section structure of the insulation crust of a kind of electronic voltage transducer that the utility model embodiment three provides
Schematic diagram.
As shown in figure 3, a kind of insulation crust of electronic voltage transducer provided in this embodiment and above-described embodiment are not
With the inside of side wall of outer shell 1 employs polyline shaped structure.
The inside of side wall of outer shell 1 employs polyline shaped structure.Creepage distance of the internal high pressure end to low-pressure end can be increased,
Even if break-off has occurred by thermocycling with built-in electrical insulation medium in outer casing inner wall, since internal creepage distance is enough
Greatly, the phenomenon that voltage is from high-pressure side breakdown to low-pressure end will not occur, so as to ensure to protect terminal installation not by high voltage
Impact.
Above-described specific embodiment has carried out the purpose of the present invention, technical solution and advantageous effect further
It is described in detail, it should be understood that the foregoing is merely the specific embodiment of the present invention, is not intended to limit the present invention
Protection domain, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all include
Within protection scope of the present invention.
Claims (5)
- A kind of 1. insulation crust of electronic voltage transducer, including shell, which is characterized in that circle of the shell for no bottom wall Cylindricality insulation shell, the outside of the side wall of outer shell is full skirt shape structure, and the inside of the side wall of outer shell is nonplanar structure, outside The interior outside of shell upper wall is planar structure, and is provided with to install the first through hole of inserted sheet metal on shell upper wall；It is described outer Upper metal is equipped in the space that the outside of shell upper wall and side wall upper part point and the inside of shell upper wall and side wall upper part point are surrounded Shielding case, the upper metallic shield upper wall are provided with the second through-hole passed through to inserted sheet metal；The side wall of outer shell lower part Lower metallic shield is equipped in the space that outside is surrounded with inside, the upper metallic shield does not connect with the lower metallic shield It touches.
- A kind of 2. insulation crust of electronic voltage transducer according to claim 1, which is characterized in that the shell side The inside of wall is step structure.
- A kind of 3. insulation crust of electronic voltage transducer according to claim 1, which is characterized in that the shell side The inside of wall is full skirt shape structure.
- A kind of 4. insulation crust of electronic voltage transducer according to claim 1, which is characterized in that the shell side The inside of wall is polyline shaped structure.
- A kind of 5. insulation crust of electronic voltage transducer according to claim 1, which is characterized in that the upper metal The height of shielding case and lower metallic shield is less than the half of outer cover height.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721766214.5U CN207586267U (en) | 2017-12-18 | 2017-12-18 | A kind of insulation crust of electronic voltage transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721766214.5U CN207586267U (en) | 2017-12-18 | 2017-12-18 | A kind of insulation crust of electronic voltage transducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207586267U true CN207586267U (en) | 2018-07-06 |
Family
ID=62738472
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721766214.5U Expired - Fee Related CN207586267U (en) | 2017-12-18 | 2017-12-18 | A kind of insulation crust of electronic voltage transducer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207586267U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111929516A (en) * | 2020-06-30 | 2020-11-13 | 国网黑龙江省电力有限公司电力科学研究院 | Reactor low-temperature resistance detection system and detection method based on optical fiber sensor |
| CN112039011A (en) * | 2020-08-20 | 2020-12-04 | 深圳供电局有限公司 | Cable umbrella skirt shielding cover and cable transfer box |
| CN111929516B (en) * | 2020-06-30 | 2024-04-26 | 国网黑龙江省电力有限公司电力科学研究院 | Reactor low temperature resistance detection system and method based on optical fiber sensor |
-
2017
- 2017-12-18 CN CN201721766214.5U patent/CN207586267U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111929516A (en) * | 2020-06-30 | 2020-11-13 | 国网黑龙江省电力有限公司电力科学研究院 | Reactor low-temperature resistance detection system and detection method based on optical fiber sensor |
| CN111929516B (en) * | 2020-06-30 | 2024-04-26 | 国网黑龙江省电力有限公司电力科学研究院 | Reactor low temperature resistance detection system and method based on optical fiber sensor |
| CN112039011A (en) * | 2020-08-20 | 2020-12-04 | 深圳供电局有限公司 | Cable umbrella skirt shielding cover and cable transfer box |
| CN112039011B (en) * | 2020-08-20 | 2022-05-17 | 深圳供电局有限公司 | Cable umbrella skirt shielding cover and cable transfer box |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| 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: 20180706 Termination date: 20191218 |