CN203310921U - Vacuum circuit breaker shield capacitance detection device - Google Patents
Vacuum circuit breaker shield capacitance detection device Download PDFInfo
- Publication number
- CN203310921U CN203310921U CN2013203532222U CN201320353222U CN203310921U CN 203310921 U CN203310921 U CN 203310921U CN 2013203532222 U CN2013203532222 U CN 2013203532222U CN 201320353222 U CN201320353222 U CN 201320353222U CN 203310921 U CN203310921 U CN 203310921U
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- Prior art keywords
- copper foil
- circuit breaker
- processing unit
- vacuum circuit
- capacitance
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Abstract
The utility model discloses a vacuum circuit breaker shield capacitance detection device. The device is characterized in that the device comprises a copper foil, a vacuum circuit breaker and a detection processing unit; the copper foil is attached to the position level with a shield on the surface of a vacuum circuit breaker. The detection processing unit is connected with the copper foil through a wire. The detection processing unit is composed of an electric field sensor, a support circuit and a single chip microcomputer. The electric field sensor is used for detecting the electric field numerical value on the copper foil and transmitting the measurement data to the single chip microcomputer. The single chip microcomputer calculates the capacitance of the shield. The electric field sensor of the detection processing unit is integrated with a signal generating circuit which can generate a low frequency sine wave, wherein the frequency is adjusted through a resistor which is connected with an external pin within the waveband of the ISM band of 120 to 130KHz. The detection device provided by the utility model has the advantages of simple structure, convenient use, low cost and high measurement sensitivity.
Description
Technical field
The utility model relates to the device that a kind of capacitance detects, and particularly a kind of device of vacuum circuit breaker radome capacitance detection, belong to detection field.
Background technology
The development of power industry makes vacuum circuit breaker obtain application very widely, and the quality of its performance will be directly connected to the stability of distribution system.As switchgear important in a kind of electrical network, the effect of vacuum circuit breaker in electrical network is: close power circuit, to carry and to switch electric load; From system, exiting faulty equipment and faulty line, guarantee power system security, normal operation.Along with to the going deep into of vacuum circuit breaker research, the researchist finds that the large I of capacitance on radome is used to understand the dynamic change of vacuum extinction chamber interior, and the operation conditions of assessment vacuum circuit breaker, stablize significant to guaranteeing operation of power networks.Therefore the detection of vacuum circuit breaker radome capacitance is more and more obtained people's attention.
Summary of the invention
The device that deficiency radome detected in order to overcome prior art, the utility model provide a kind of vacuum circuit breaker radome capacitance to detect, make it when not changing vacuum arc extinguish chamber structure, detects the capacitance size of radome.The utility model apparatus structure is simple, practical safe ready, cost is low, measuring accuracy is high, on the insulating property of arc-chutes and isolating switch without impact.
A kind of method that vacuum circuit breaker radome capacitance detects, when the vacuum isolating switch is worked, static charge in vacuum circuit breaker on the arc-chutes radome can make metal surface on every side induced charge occur, Copper Foil is attached to the radome position of vacuum circuit breaker outside surface, make its position with the arc-chutes radome corresponding, use wire to connect Check processing unit and Copper Foil, then detect induction field size on Copper Foil, calculate the capacitance values of radome, computation process is as follows.
If contact is the capacitance on radome when closing position
C1, contact capacitance on radome when open position is
C2,
C1 with
C2 induction field values on Copper Foil are
U1 with
U2, the electric field value detected on Copper Foil is U, because there are linear relationship in electric capacity and electric field, and corresponding capacitance on Copper Foil now
CFor.
For realizing above purpose, the utility model solves the technical scheme that its technical matters adopts and is.
The device that a kind of vacuum circuit breaker radome capacitance detects, comprising: Copper Foil, vacuum circuit breaker, Check processing unit is characterized in that.
Described Copper Foil is attached at vacuum circuit breaker surface radome equal-height position, and the Check processing unit is connected with Copper Foil by wire, gathers the copper foil surface electric field value.
Described Check processing unit is comprised of electric-field sensor and support circuit, single-chip microcomputer, and wherein, electric-field sensor is for detection of the Electric Field Numerical on Copper Foil and measurement data is passed to single-chip microcomputer, by single-chip microcomputer, is calculated the capacitance of radome.
The Check processing unit of described device can carry out the teledata transmitting-receiving.
In described device, the electric-field sensor of Check processing unit is integrated can produce the signal generating circuit of a low-frequency sine, its frequency can be regulated by the resistance be connected on external pin, and frequency is usually within the ISM of 120-130KHz wavelength band.Sinusoidal wave harmonic content is very low, can avoid producing humorous wave interference.Simultaneously, sensor internal produces the peak-peak output voltage of a 5V, and is that analog switch feeds back on electrode pin by internal resistance.Due to the falling of voltage on internal resistance, on pin, the amplitude of signal will reduce with output current, and the detector of sensor internal can convert the alternating voltage collected to DC level output.
Compared with prior art, the beneficial effect of the utility model technology is.
Without impact, the detection Copper Foil attaches the outside surface with isolating switch on the design of vacuum circuit-breaker arc extinguishing chamber inner structure, and whole testing process can not affect the insulating property of isolating switch integral body.Utilize the electric-field sensor in the Check processing unit to detect the induction field value on Copper Foil, thereby determine the capacitance size of arc-chutes inner shield.
The accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Fig. 1 is the structural representation of the utility model device.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, below embodiment of the present utility model is done further and explained in detail.
As shown in Figure 1, the device that this vacuum circuit breaker radome capacitance detects, comprise Copper Foil 3, vacuum circuit breaker, Check processing unit 4, and Copper Foil 3 is attached at vacuum circuit breaker surface radome 2 equal-height positions, Check processing unit 4 is connected with Copper Foil 3 by wire, gathers Copper Foil 3 surface field values.
The utility model is Copper Foil 3 and the laminating of vacuum circuit breaker outside surface, and regulates its position and arc-chutes 1 inner shield 2 is contour.The electric field value that Check processing unit 4 detects on Copper Foil.
When the vacuum isolating switch was in running order, the static charge on arc-chutes 1 radome 2 can make Copper Foil 3 induced charge occur, and Check processing unit 4 can calculate the size of radome capacitance by the electric field value of measuring Copper Foil 3.
Example.
If contact is the capacitance on radome when closing position
C1, contact capacitance on radome when open position is
C2,
C1 with
C2 induction field values on Copper Foil are
U1 with
U2, the electric field value detected on Copper Foil is U, because there are linear relationship in electric capacity and electric field, and corresponding capacitance on Copper Foil now
CFor.
Although by reference some preferred implementation of the present utility model, the utility model is illustrated and describes, but those of ordinary skill in the art should be understood that can be in form or branch road quantitatively it is done to various changes, and do not depart from spirit and scope of the present utility model.
Claims (1)
1. the device that detects of a vacuum circuit breaker radome capacitance, comprise: Copper Foil, vacuum circuit breaker, the Check processing unit, it is characterized in that: described Copper Foil is attached at vacuum circuit breaker surface radome equal-height position, described Check processing unit is connected with Copper Foil by wire, the Check processing unit is by electric-field sensor and support circuit, single-chip microcomputer forms, wherein, electric-field sensor is for detection of the Electric Field Numerical on Copper Foil and measurement data is passed to single-chip microcomputer, by single-chip microcomputer, calculated the capacitance of radome, the electric-field sensor of described Check processing unit is integrated with the signal generating circuit that can produce a low-frequency sine, its frequency is regulated by the resistance be connected on external pin, within the ISM of 120-130KHz wavelength band.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203532222U CN203310921U (en) | 2013-06-20 | 2013-06-20 | Vacuum circuit breaker shield capacitance detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203532222U CN203310921U (en) | 2013-06-20 | 2013-06-20 | Vacuum circuit breaker shield capacitance detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203310921U true CN203310921U (en) | 2013-11-27 |
Family
ID=49617122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203532222U Expired - Fee Related CN203310921U (en) | 2013-06-20 | 2013-06-20 | Vacuum circuit breaker shield capacitance detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203310921U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105259422A (en) * | 2015-10-22 | 2016-01-20 | 宁波力芯科信息科技有限公司 | Capacitance measurement circuit, liquid level detection circuit and method of using same, liquid level height detection circuit, water heater, and smart home device |
| CN111736066A (en) * | 2019-03-22 | 2020-10-02 | 中国船舶重工集团公司第七一一研究所 | Automatic testing device for detecting circuit breaker |
-
2013
- 2013-06-20 CN CN2013203532222U patent/CN203310921U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105259422A (en) * | 2015-10-22 | 2016-01-20 | 宁波力芯科信息科技有限公司 | Capacitance measurement circuit, liquid level detection circuit and method of using same, liquid level height detection circuit, water heater, and smart home device |
| CN105259422B (en) * | 2015-10-22 | 2018-03-30 | 宁波力芯科信息科技有限公司 | Capacitance measurement circuit, liquid level detection circuit and its application method, liquid level detection circuit, water heater, intelligent home device |
| CN111736066A (en) * | 2019-03-22 | 2020-10-02 | 中国船舶重工集团公司第七一一研究所 | Automatic testing device for detecting circuit breaker |
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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: 20131127 Termination date: 20160620 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |