CN204389668U - A kind of ground voltage influence amount simulator - Google Patents
A kind of ground voltage influence amount simulator Download PDFInfo
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- CN204389668U CN204389668U CN201520062272.4U CN201520062272U CN204389668U CN 204389668 U CN204389668 U CN 204389668U CN 201520062272 U CN201520062272 U CN 201520062272U CN 204389668 U CN204389668 U CN 204389668U
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- Prior art keywords
- transformer
- voltage
- amplifier
- current
- ground voltage
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- 238000009863 impact test Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000008485 antagonism Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003412 degenerative effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
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- Measurement Of Resistance Or Impedance (AREA)
Abstract
The utility model discloses a kind of ground voltage influence amount simulator, comprise power supply, transformer, high-order low-pass filter, voltage amplifier, current amplifier, current transformer and feedback system, described transformer is connected into described power supply, described transformer, high-order low-pass filter, voltage amplifier, current amplifier, current transformer connect successively, and described feedback system parallel connection is connected between described voltage amplifier, current transformer and forms loop.The utility model has the advantages that frequency, the amplitude characteristic that can simulate ground voltage, and have good output stability and minimum output resistance, completed the stable output of voltage at the output terminal of simulator by the control end that isolating transformer feeds back to industrial-frequency alternating current potential source, adjustable to itself and standard low resistance case is combined the calibrating and calibration that can complete earth resistance meter.
Description
Technical field
The utility model relates to a kind of electrical measuring gauging instrument, and particularly one carries out " ground voltage impact test " test instrument used to earth resistance meter.
Background technology
In JJG 366-2004 " earth resistance meter vertification regulation ", " ground voltage impact test " is carried out on earth resistance meter and need special test instrument.The domestic calibrating installation that there is no the anti-ground voltage impact of special earth resistance meter at present.
Utility model content
Utility model object: for the problems referred to above, the purpose of this utility model is to provide a kind of interference voltage simulating earth mat, and checks earth resistance meter to deposit the specialized simulation device of measurement of Grounding Resistance accuracy in case at interference voltage.
Technical scheme: a kind of ground voltage influence amount simulator, comprise power supply, transformer, high-order low-pass filter, voltage amplifier, current amplifier, current transformer and feedback system, described transformer is connected into described power supply, described transformer, high-order low-pass filter, voltage amplifier, current amplifier, current transformer connect successively, and described feedback system parallel connection is connected between described voltage amplifier, current transformer and forms loop.
Described feedback system is made up of isolating transformer, rectification circuit, integrating circuit, range switch circuit, described isolating transformer, rectification circuit, integrating circuit connect successively, described range switch circuit is connected into described integrating circuit, described integrating circuit is connected into described voltage amplifier, and described current transformer is connected into described isolating transformer.
Principle of the present utility model is: 220V power through transformer be divided into two-way export, power supply wherein as simulator after a road rectification uses, another road produces the less sine wave of degree of distortion through high-order low-pass filter after removing higher than the high fdrequency component of 100HZ in civil power, this sine wave produces final output voltage respectively through after voltage amplifier and current amplifier, feedback system converts this output voltage to control voltage, the ratio that control voltage is amplified, thus realize voltage stabilizing closed loop, wherein uniquely not having vicissitudinous is exactly frequency, the frequency Shi Sui city Electrical change that voltage exports changes, the functional character of analog ground voltage can be realized to greatest extent, meet the requirement of earth resistance meter vertification regulation.
Beneficial effect: compared with prior art, the utility model has the advantages that frequency, the amplitude characteristic that can simulate ground voltage, and have good output stability and minimum output resistance, completed the stable output of voltage at the output terminal of simulator by the control end that isolating transformer feeds back to industrial-frequency alternating current potential source, adjustable to itself and standard low resistance case is combined the calibrating and calibration that can complete earth resistance meter.
Accompanying drawing explanation
Fig. 1 is the utility model structure principle chart;
Fig. 2 is that the utility model uses line graph.
Embodiment
Below in conjunction with the drawings and specific embodiments, illustrate the utility model further, these embodiments should be understood and be only not used in restriction scope of the present utility model for illustration of the utility model, after having read the utility model, the amendment of those skilled in the art to the various equivalent form of value of the present utility model has all fallen within the application's claims limited range.
As shown in Figure 1, a kind of ground voltage influence amount simulator, primarily of three part compositions: the current transformer that the work frequency follow circuit of active power filtering, band export degenerative power amplification circuit, band Class A is amplified.Specifically comprise with lower component: power supply 1, transformer 2, high-order low-pass filter 3, voltage amplifier 4, current amplifier 5, current transformer 6 and feedback system 7, feedback system 7 is made up of isolating transformer 8, rectification circuit 9, integrating circuit 10, range switch circuit 11.
Transformer 2 is connected into power supply 1, transformer 2, high-order low-pass filter 3, voltage amplifier 4, current amplifier 5, current transformer 6 connect successively, isolating transformer 8, rectification circuit 9, integrating circuit 10 connect successively, range switch circuit 11 is connected into integrating circuit 10, integrating circuit 10 is connected into voltage amplifier 4, and current transformer 6 is connected into isolating transformer 8.
220V power through transformer 2 be divided into two-way export, power supply 1 wherein as simulator after a road rectification uses, another road produces the less sine wave of degree of distortion through high-order low-pass filter 3 after removing higher than the high fdrequency component of 100HZ in civil power, this sine wave is exported by current transformer 6 respectively through after voltage amplifier 4 and current amplifier 5, produce final output voltage, the output voltage of current transformer 6 is after the rectification of isolating transformer 8 and rectification circuit 9 thereof, feedback control signal is formed by integrating circuit 10, this signal carrys out the enlargement factor of control voltage amplifier 4 by range switch circuit 11, thus realize voltage stabilizing closed loop.
As shown in Figure 2, in the ground voltage influence amount test of earth resistance meter, needing connects the output terminal of the utility model ground voltage influence amount simulator 12 with grounding electric resistance meter detecting device 13, earth resistance meter 14 forms loop, the impact that simulation earth mat interference source is measured earth resistance meter.Respectively under the power frequency output voltage of 0V, 2V, 5V, output resistance < 200m Ω, records each range accuracy: 0V is < 20mV, 2V be ± 2%, 5V is ± 2%.The error change of calibrating earth resistance meter, thus judge the interference free performance of tested earth resistance meter.
It is exactly frequency that the utility model does not uniquely have vicissitudinous in using, and the frequency Shi Sui city Electrical change that voltage exports changes, and can realize the functional character of analog ground voltage to greatest extent, meet the requirement of earth resistance meter vertification regulation.
The utility model can improve the standard of tracing to the source of earth resistance meter, carries out the calibrating first that the impact of antagonism ground voltage has the earth resistance meter of requirement.
Claims (2)
1. a ground voltage influence amount simulator, it is characterized in that: comprise power supply (1), transformer (2), high-order low-pass filter (3), voltage amplifier (4), current amplifier (5), current transformer (6) and feedback system (7), described transformer (2) is connected into described power supply (1), described transformer (2), high-order low-pass filter (3), voltage amplifier (4), current amplifier (5), current transformer (6) connects successively, described feedback system (7) parallel connection is connected into described voltage amplifier (4), current transformer forms loop between (6).
2. a kind of ground voltage influence amount simulator according to claim 1, it is characterized in that: described feedback system (7) is by isolating transformer (8), rectification circuit (9), integrating circuit (10), range switch circuit (11) forms, described isolating transformer (8), rectification circuit (9), integrating circuit (10) connects successively, described range switch circuit (11) is connected into described integrating circuit (10), described integrating circuit (10) is connected into described voltage amplifier (4), described current transformer (6) is connected into described isolating transformer (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520062272.4U CN204389668U (en) | 2015-01-28 | 2015-01-28 | A kind of ground voltage influence amount simulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520062272.4U CN204389668U (en) | 2015-01-28 | 2015-01-28 | A kind of ground voltage influence amount simulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204389668U true CN204389668U (en) | 2015-06-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520062272.4U Expired - Fee Related CN204389668U (en) | 2015-01-28 | 2015-01-28 | A kind of ground voltage influence amount simulator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204389668U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105791773A (en) * | 2016-04-04 | 2016-07-20 | 合肥博雷电子信息技术有限公司 | 3G video image monitoring device based on computer network |
| CN109781058A (en) * | 2019-01-24 | 2019-05-21 | 上海耀华称重系统有限公司 | Strain gauge load cell simulator |
| CN118914720A (en) * | 2024-08-15 | 2024-11-08 | 广州市联畅电子技术有限公司 | Quality inspection system for installation of power system |
-
2015
- 2015-01-28 CN CN201520062272.4U patent/CN204389668U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105791773A (en) * | 2016-04-04 | 2016-07-20 | 合肥博雷电子信息技术有限公司 | 3G video image monitoring device based on computer network |
| CN109781058A (en) * | 2019-01-24 | 2019-05-21 | 上海耀华称重系统有限公司 | Strain gauge load cell simulator |
| CN109781058B (en) * | 2019-01-24 | 2020-11-17 | 上海耀华称重系统有限公司 | Strain sensor simulator |
| CN118914720A (en) * | 2024-08-15 | 2024-11-08 | 广州市联畅电子技术有限公司 | Quality inspection system for installation of power system |
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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: 20150610 Termination date: 20170128 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |