CN102937664A - Oil-immersed capacitive voltage divider - Google Patents
Oil-immersed capacitive voltage divider Download PDFInfo
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- CN102937664A CN102937664A CN 201210438450 CN201210438450A CN102937664A CN 102937664 A CN102937664 A CN 102937664A CN 201210438450 CN201210438450 CN 201210438450 CN 201210438450 A CN201210438450 A CN 201210438450A CN 102937664 A CN102937664 A CN 102937664A
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Abstract
An oil-immersed capacitive voltage divider comprises a case, a cover plate, a base plate and an insulated casing which is arranged on the base board. A shielding casing is arranged on the insulated casing, a capacitor polar plate is arranged on the insulated casing and inside the shielding casing, and an insulated layer is arranged between the insulated casing and the capacitor polar plate. A bayonet nut connector (BAC) base is arranged on the shielding casing and connected with the capacitor polar plate through a current limiting protection resistor. The capacitor polar plate is connected with the shielding casing through a voltage dividing sampling capacitor. The signal output is connected through the shielding casing, so that the accuracy of sampling signals is guaranteed, the dismounting is facilitated, interference to the capacitive voltage divider in severe electromagnetic environments is reduced, voltages are measured accurately, and performances deserved by the capacitive voltage divider can be met. The capacitive voltage divider is high in accuracy, small in error and attractive in appearance.
Description
Technical field:
The present invention relates to a kind of oil immersed type capacitive divider.
Background technology:
At present, along with the development of science and technology, the application of voltage divider is more and more general, and various types of voltage dividers are along with the difference of purposes is arisen at the historic moment.Its performance is more reliable, and precision is higher.Under mal-condition, work, for example vehicle-mounted vibrations, high height above sea level is under the environment of severe cold.Usually use the RC divider of encapsulation type, although but it is higher to satisfy requirement voltage withstand voltage, precision, the heat of its generation also strengthens thereupon, and volume also can correspondingly increase, in condition preferably under the environment, laboratory for example, sensing chamber etc. can use capacitive divider, conventional capacitive divider adopts strip transmission line, because there is the border in strip line, electric field is inhomogeneous, easily produces intercoupling.
Summary of the invention
The technical issues that need to address of the present invention provide a kind of oil immersed type capacitive divider to reach the high-tension purpose of accurate measurement capacitive divider.
In order to solve the problems of the technologies described above; technical scheme of the present invention is; a kind of oil immersed type capacitive divider; comprise casing; cover plate; base plate; be arranged on the insulation crust on the base plate; described insulation crust is provided with screening can; insulation crust is provided with capacitor plate in the described screening can, is provided with insulation course between insulation crust and the capacitor plate, and screening can is provided with the BNC seat; described BNC seat is connected with capacitor plate by current-limiting protection resistance, and capacitor plate is connected with screening can by the dividing potential drop sampling capacitor.
Described screening can is " U " type.
Be provided with the electric capacity stem stem in the described casing, the electric capacity stem stem is provided with high tension terminal, and described high tension terminal stretches out outside the cover plate, and described casing is provided with circular hole.
Described high tension terminal and electric capacity stem stem are right cylinder, the diameter of described high tension terminal is less than the diameter of electric capacity stem stem, described high tension terminal and electric capacity stem stem are arranged on the middle part of casing, and the end of described high tension terminal and electric capacity stem stem is equipped with arc transition.
The present invention compared with prior art; insulation crust is provided with screening can; insulation crust is provided with capacitor plate in the described screening can; be provided with insulation course between insulation crust and the capacitor plate; screening can is provided with the BNC seat; described BNC seat is connected with capacitor plate by current-limiting protection resistance, and capacitor plate is connected with screening can by the dividing potential drop sampling capacitor.Signal output is adopted screening can to connect and has namely been guaranteed the accurate of sampled signal like this, for convenience detach again, not only reduced capacitive divider and in abominable electromagnetic environment, be interfered, accurate measuring voltage, simultaneously can satisfy the due performance of capacitive divider, precision is high, error is little, attractive in appearance.
Description of drawings
Fig. 1 is structural representation of the present invention;
In Fig. 1,1, base plate; 2, screening can; 3, BNC seat; 4, dividing potential drop sampling capacitor; 5, current-limiting protection resistance; 6, capacitor plate; 7, insulation course; 8, cover plate; 9, high tension terminal; 10, electric capacity stem stem; 11, insulation crust; 12, nylon screw.
Embodiment
As shown in Figure 1; a kind of oil immersed type capacitive divider; comprise casing; cover plate 8; base plate 1; be arranged on the insulation crust 11 on the base plate 1; described insulation crust 11 is provided with screening can 2; described screening can 2 interior insulation crusts 11 are provided with capacitor plate 6; be provided with insulation course 7 between insulation crust 11 and the capacitor plate 6; screening can 2 is provided with BNC seat 3, and described BNC seat 3 is connected with capacitor plate 6 by current-limiting protection resistance 5, and capacitor plate 6 is connected with screening can 2 by dividing potential drop sampling capacitor 4.
Dividing potential drop sampling capacitor 4 easily is interfered, larger on the sampled signal impact when being interfered, so that sampling value and actual value deviation are larger, so be " U " type at screening can 2, sample circuit has been done shielding processing, so that sampled signal is interfered is less, taking a sample by BNC seat and shielded cable obtains comparatively clean signal.The dividing potential drop sampling capacitor is delivered to control module with the data of getting and is shown, shows the voltage of high tension terminal 9.
Be provided with electric capacity stem stem 10 in the described casing, electric capacity stem stem 10 is provided with high tension terminal 9, and described high tension terminal 9 stretches out outside the cover plate 8, and described casing is provided with circular hole.Capacitive divider determines the size and number of circular hole according to the needs of intrinsic standoff ratio size.
Described high tension terminal 9 and electric capacity stem stem 10 are right cylinder, the diameter of described high tension terminal 9 is less than the diameter of electric capacity stem stem 10, described high tension terminal 9 and electric capacity stem stem 10 are arranged on the middle part of casing, can guarantee that like this electric field is even, the end of described high tension terminal 9 and electric capacity stem stem 10 is equipped with arc transition.Arc transition avoids high pressure to cause point discharge, and external cylindrical surface not only can make internal electric field evenly distribute, and can also protect internal electric field to play Anti-Jamming; The material selection that solves the voltage divider two-terminal is to require the two poles of the earth opposite face Glabrous thorn according to the voltage divider electric field distribution characteristic, selects the chromium plating of sheet copper molded surface in conjunction with requirement on electric performance, and quality is light, surface-brightening, and be conducive to heat radiation.
Described screening can 2 is connected with insulation crust 11 by nylon screw 12.
The above has carried out exemplary description to the present invention by reference to the accompanying drawings; obviously specific implementation of the present invention is not subjected to the restriction of aforesaid way; as long as the various improvement of having adopted method design of the present invention and technical scheme to carry out; or directly apply to other occasion without improvement, all within protection scope of the present invention.
Claims (4)
1. oil immersed type capacitive divider; comprise casing; cover plate (8); base plate (1); be arranged on the insulation crust (11) on the base plate (1); it is characterized in that: described insulation crust (11) is provided with screening can (2); the interior insulation crust of described screening can (2) (11) is provided with capacitor plate (6); be provided with insulation course (7) between insulation crust (11) and the capacitor plate (6); screening can (2) is provided with BNC seat (3); described BNC seat (3) is connected with capacitor plate (6) by current-limiting protection resistance (5), and capacitor plate (6) is connected with screening can (2) by dividing potential drop sampling capacitor (4).
2. a kind of oil immersed type capacitive divider according to claim 1, it is characterized in that: described screening can (2) is " U " type.
3. a kind of oil immersed type capacitive divider according to claim 1 and 2, it is characterized in that: be provided with electric capacity stem stem (10) in the described casing, electric capacity stem stem (10) is provided with high tension terminal (9), described high tension terminal (9) stretches out outside the cover plate (8), and described casing is provided with circular hole.
4. a kind of oil immersed type capacitive divider according to claim 3, it is characterized in that: described high tension terminal (9) and electric capacity stem stem (10) are right cylinder, the diameter of described high tension terminal (9) is less than the diameter of electric capacity stem stem (10), described high tension terminal (9) and electric capacity stem stem (10) are arranged on the middle part of casing, and the end of described high tension terminal (9) and electric capacity stem stem (10) is equipped with arc transition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210438450 CN102937664A (en) | 2012-11-06 | 2012-11-06 | Oil-immersed capacitive voltage divider |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210438450 CN102937664A (en) | 2012-11-06 | 2012-11-06 | Oil-immersed capacitive voltage divider |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102937664A true CN102937664A (en) | 2013-02-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201210438450 Pending CN102937664A (en) | 2012-11-06 | 2012-11-06 | Oil-immersed capacitive voltage divider |
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| CN (1) | CN102937664A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104267232B (en) * | 2014-10-13 | 2017-06-30 | 西安交通大学 | A kind of non-cpntact measurement capacitance sensor lower frequency limit extension system |
-
2012
- 2012-11-06 CN CN 201210438450 patent/CN102937664A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104267232B (en) * | 2014-10-13 | 2017-06-30 | 西安交通大学 | A kind of non-cpntact measurement capacitance sensor lower frequency limit extension system |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130220 |