CN203909129U - Capacitive voltage divider type voltage sensor - Google Patents
Capacitive voltage divider type voltage sensor Download PDFInfo
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- CN203909129U CN203909129U CN201420356251.9U CN201420356251U CN203909129U CN 203909129 U CN203909129 U CN 203909129U CN 201420356251 U CN201420356251 U CN 201420356251U CN 203909129 U CN203909129 U CN 203909129U
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Abstract
The utility model discloses a capacitive voltage divider type voltage sensor which comprises a first capacitor connected with a primary side voltage line and a shunt capacitor bank connected with the first capacitor. The output end of the shunt capacitor bank is connected with a secondary side voltage line. The shunt capacitor bank comprises two second capacitors having same parameters. Two leads are further comprised, wherein one lead is connected with the output end of the first capacitor, and the other lead is connected with the output end of the shunt capacitor bank. According to the utility model, advantages of small size, light weight, good voltage resistance, small temperature drift coefficient and high accuracy can be realized, the monitoring and sampling accuracy at a high voltage level can reach 1%, and the working temperature ranges from -40 DEG C to +85 DEG C.
Description
Technical field
The utility model belongs to power measurement field, is specifically related to a kind of capacitive divided voltage sensor, for Low Drift Temperature precision measurement under voltage levels.
Background technology
Induction voltage transformer (VT): its principle of work is identical with transformer, basic structure is also unshakable in one's determination and former and deputy winding.Feature is that capacity is very little and more constant, while normally operation close to light condition.The impedance of voltage transformer (VT) itself is very little, once secondary is short-circuited, coil is burnt in sharp increase by electric current.For this reason, the former edge joint of voltage transformer (VT) has fuse, secondary reliable ground, in order to avoid former and deputy limit when damage insulation, there is over the ground noble potential and cause the person and equipment breakdown in secondary.
Measure and generally all make single phase two-line coil structures with voltage transformer (VT), its original edge voltage is tested voltage (as the line voltage of electric system), can single-phasely use, and also can be connected into V-V shape with two and do three-phase use.But it is large that it has volume, quality is large, flimsy shortcoming, and common capacitance partial pressure exists temperature drift coefficient large in addition, and poor practicability cannot substitute the shortcoming of electromagnetic potential transformer.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of capacitive divided voltage sensor, having solved traditional voltage measurement change send element all to use electromagnetic potential transformer, it is large that electromagnetic potential transformer has volume, quality is large, flimsy shortcoming, common capacitance partial pressure exists temperature drift coefficient large in addition, and poor practicability cannot substitute the shortcoming of electromagnetic potential transformer.
The utlity model has volume little, quality is light, and withstand voltage height, the feature that temperature drift coefficient is little, precision is high can realize the precision of monitoring sampling under voltage levels is reached to 1%, and operating temperature range is to-40 DEG C～+ 85 DEG C.
For achieving the above object, the technical solution of the utility model is as follows:
A kind of capacitive divided voltage sensor, comprising:
One the first electric capacity being connected with primary side pressure-wire,
The one shunt capacitance group being connected with the first electric capacity, the output terminal of described shunt capacitance group is connected with secondary side pressure-wire, and described shunt capacitance group comprises two the second electric capacity that parameter is identical.
In a preferred embodiment of the present utility model, also comprise two lead-in wires, a lead-in wire connects the output terminal of the first electric capacity, and another root lead-in wire connects the output terminal of shunt capacitance group.
In a preferred embodiment of the present utility model, described the first electric capacity is selected Low Drift Temperature nano ceramics electric capacity, and the second electric capacity is selected low-voltage capacitance; Described the first electric capacity carries out dividing potential drop one time to primary side voltage, and the second electric capacity carries out second divided voltage and tuning.
In a preferred embodiment of the present utility model, described the first electric capacity connects primary side pressure-wire by high-voltage conductive rod, and the output end of described shunt capacitance group is also connected with silk braid in ground connection.
In a preferred embodiment of the present utility model, whole sensor package is in insulating coating inside.
By technique scheme, the beneficial effects of the utility model are:
The utlity model has volume little, quality is light, and withstand voltage height, the feature that temperature drift coefficient is little, precision is high can realize the precision of monitoring sampling under voltage levels is reached to 1%, and operating temperature range is to-40 DEG C～+ 85 DEG C.
Brief description of the drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is fundamental diagram of the present utility model.
Fig. 2 is cut-open view of the present utility model.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach object and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
See figures.1.and.2, a kind of capacitive divided voltage sensor, whole sensor package is in insulating coating 2 inside, comprise: first electric capacity 3 being connected with primary side pressure-wire, the one shunt capacitance group being connected with the first electric capacity 3, the output terminal of described shunt capacitance group is connected with secondary side pressure-wire, and described shunt capacitance group comprises two the second electric capacity 4 that parameter is identical; Also comprise that 5, lead-in wires of two lead-in wires connect the output terminal of the first electric capacity, another root lead-in wire connects the output terminal of shunt capacitance group.
First electric capacity 3 and the second electric capacity 4 do not need high precision, but in proportion after pairing, can produce the voltage sensor that high conformity precision is high.
The first electric capacity 3 and the second electric capacity 4, with negative temperature or positive temperature coefficient (PTC) electric capacity, can be eliminated portion temperature and change the impact on sensor accuracy.
Two the second electric capacity 4 can make output not produce high pressure in the time that any one second electric capacity 4 damages, and ensure equipment personal safety.
Wherein the first electric capacity 3 is selected Low Drift Temperature nano ceramics electric capacity, and the second electric capacity 4 is selected low-voltage capacitance; Described the first electric capacity carries out dividing potential drop one time to primary side voltage, and the second electric capacity carries out second divided voltage and tuning.
Wherein the first electric capacity 3 connects primary side pressure-wire by high-voltage conductive rod 1, and the output end of described shunt capacitance group is also connected with silk braid 6 in ground connection.
Low Drift Temperature nano ceramics electric capacity carries out that dividing potential drop, a high precision low pressure electric capacity carry out second divided voltage and precision is tuning, and output connects high precision low pressure electric capacity two ends;
Two high precision low pressure Capacitance parallel connections can pass through its step-down voltage signal after treatment by group match Low Drift Temperature nano ceramics electric capacity, make the voltage signal of its output reach Low Drift Temperature, high precision technology index.
And utilize two high precision low pressure electric capacity not only can effectively improve the precision that it is differentiated voltage, but also can improve the security reliability of its element, both form redundancy structure, after a low-voltage capacitance damages, can start immediately another low-voltage capacitance; Also can both use simultaneously;
The capacitor's capacity of Low Drift Temperature nano ceramics electric capacity is little, high by the voltage drop after its electric capacity, the capacitor's capacity of high precision low pressure electric capacity is large, low by the voltage drop after its electric capacity, but precision is very high, thereby by the high voltage of Low Drift Temperature nano ceramics electric capacity, is converted to and can be high precision low pressure electric capacity identification low-voltage, carry out resonance matching by two high precision low pressure electric capacity again, reach and can be monitoring equipment and identify high-precision voltage signal.
Utilize the utility model, primary side voltage is AC5.77KV, and through the conversion of this sensor, secondary side can reach AC2.165V voltage.
The utlity model has volume little, quality is light, and withstand voltage height, the feature that temperature drift coefficient is little, precision is high can realize the precision of monitoring sampling under voltage levels is reached to 1%, and operating temperature range is to-40 DEG C～+ 85 DEG C.
More than show and described ultimate principle of the present utility model and principal character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that in above-described embodiment and instructions, describes just illustrates principle of the present utility model; do not departing under the prerequisite of the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (5)
1. a capacitive divided voltage sensor, is characterized in that, comprising:
One the first electric capacity being connected with primary side pressure-wire,
The one shunt capacitance group being connected with the first electric capacity, the output terminal of described shunt capacitance group is connected with secondary side pressure-wire, and described shunt capacitance group comprises two the second electric capacity that parameter is identical.
2. a kind of capacitive divided voltage sensor according to claim 1, is characterized in that, also comprises two lead-in wires, and a lead-in wire connects the output terminal of the first electric capacity, and another root lead-in wire connects the output terminal of shunt capacitance group.
3. a kind of capacitive divided voltage sensor according to claim 1, is characterized in that, described the first electric capacity is selected Low Drift Temperature nano ceramics electric capacity, and the second electric capacity is selected low-voltage capacitance; Described the first electric capacity carries out dividing potential drop one time to primary side voltage, and the second electric capacity carries out second divided voltage and tuning.
4. a kind of capacitive divided voltage sensor according to claim 1, is characterized in that, described the first electric capacity connects primary side pressure-wire by high-voltage conductive rod, and the output end of described shunt capacitance group is also connected with silk braid in ground connection.
5. a kind of capacitive divided voltage sensor according to claim 1, is characterized in that, whole sensor package is in insulating coating inside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420356251.9U CN203909129U (en) | 2014-06-30 | 2014-06-30 | Capacitive voltage divider type voltage sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420356251.9U CN203909129U (en) | 2014-06-30 | 2014-06-30 | Capacitive voltage divider type voltage sensor |
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| Publication Number | Publication Date |
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| CN203909129U true CN203909129U (en) | 2014-10-29 |
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| CN201420356251.9U Active CN203909129U (en) | 2014-06-30 | 2014-06-30 | Capacitive voltage divider type voltage sensor |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104764916A (en) * | 2015-03-16 | 2015-07-08 | 中国计量学院 | Electronic voltage transformer based on two capacitors and gap iron core type Rogowski coils |
| CN107677866A (en) * | 2017-10-18 | 2018-02-09 | 湖北大二互科技股份有限公司 | Single-phase capacitance formula branch pressure voltage sensor |
| CN109254190A (en) * | 2018-11-20 | 2019-01-22 | 江苏思源赫兹互感器有限公司 | A kind of residual voltage sensor based on capacitance partial pressure |
| CN110620013A (en) * | 2019-09-24 | 2019-12-27 | 西安市西无二电子信息集团有限公司 | Voltage-dividing ceramic capacitor |
| EP3680672A1 (en) * | 2019-01-09 | 2020-07-15 | Microelettrica Scientifica S.p.A. | An improved device for measuring the electric power drawn by a railway vehicle from a high-voltage electric supply line |
| RU2783561C1 (en) * | 2019-01-09 | 2022-11-14 | Микроэлеттрика Шентифика С.П.А. | Improved device for measuring electrical power consumed by railway vehicle from high-voltage power supply line |
-
2014
- 2014-06-30 CN CN201420356251.9U patent/CN203909129U/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104764916A (en) * | 2015-03-16 | 2015-07-08 | 中国计量学院 | Electronic voltage transformer based on two capacitors and gap iron core type Rogowski coils |
| CN104764916B (en) * | 2015-03-16 | 2018-04-10 | 中国计量学院 | Electronic type voltage transformer based on double electric capacity and band gap iron core type Rogowski coil |
| CN107677866A (en) * | 2017-10-18 | 2018-02-09 | 湖北大二互科技股份有限公司 | Single-phase capacitance formula branch pressure voltage sensor |
| CN109254190A (en) * | 2018-11-20 | 2019-01-22 | 江苏思源赫兹互感器有限公司 | A kind of residual voltage sensor based on capacitance partial pressure |
| EP3680672A1 (en) * | 2019-01-09 | 2020-07-15 | Microelettrica Scientifica S.p.A. | An improved device for measuring the electric power drawn by a railway vehicle from a high-voltage electric supply line |
| WO2020144205A1 (en) * | 2019-01-09 | 2020-07-16 | Microelettrica Scientifica S.P.A. | An improved device for measuring the electric power drawn by a railway vehicle from a high-voltage electric supply line |
| RU2783561C1 (en) * | 2019-01-09 | 2022-11-14 | Микроэлеттрика Шентифика С.П.А. | Improved device for measuring electrical power consumed by railway vehicle from high-voltage power supply line |
| US11867727B2 (en) | 2019-01-09 | 2024-01-09 | Microelettrica Scientifica S.P.A. | Device for measuring the electric power drawn by a railway vehicle from a high-voltage electric supply line |
| CN110620013A (en) * | 2019-09-24 | 2019-12-27 | 西安市西无二电子信息集团有限公司 | Voltage-dividing ceramic capacitor |
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