CN203894334U - Automatic capacitance and inductance tester - Google Patents
Automatic capacitance and inductance tester Download PDFInfo
- Publication number
- CN203894334U CN203894334U CN201420147302.7U CN201420147302U CN203894334U CN 203894334 U CN203894334 U CN 203894334U CN 201420147302 U CN201420147302 U CN 201420147302U CN 203894334 U CN203894334 U CN 203894334U
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- CN
- China
- Prior art keywords
- electrically connected
- input end
- converter
- amplifier
- pincerlike
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses an automatic capacitance and inductance tester. The tester comprises an industrial frequency transformer. The input end of the industrial frequency transformer is connected with the commercial power supply. The output end of the industrial frequency transformer is electrically connected with a capacitor group. The input end of the capacitor group is in parallel connection with a voltage amplifier. The voltage amplifier is electrically connected with a CPU through an AD converter and an isolation circuit The CPU is electrically connected with a liquid crystal display, a thermal printer and a keyboard respectively. The AD converter is electrically connected with an output end of a current amplifier. The input end of the current amplifier is electrically connected with a pincerlike sampling circuit. The pincerlike sampling circuit is installed at the capacitor to be tested. The automatic capacitance and inductance tester employs an imported 68mm pincerlike AX detection circuit with high precision with cooperation of a digital isolation voltage detection circuit, the performances are stable, the measurement precision is high, the tester employs a backlight big screen liquid crystal display, intelligible observation can be carried out in daytime and at night.
Description
Technical field
The utility model relates to a kind of automated capacitive electric inductance measuring-testing instrument, belongs to tester technical field.
Background technology
Electric system using compensation capacitor group improves power factor.The displacement volume of reactive compensation capacitor is large, switches frequent.For the reliability of support equipment, need regularly detect.The problem that capacitor and inductor tester exists while measuring the single capacitor electrode capacitance in Shunt Capacitor Unit for substation field and special development.Traditional detection method is that electric capacity bus-bar is removed, and then measures with capacitance meter.This method remedial efforts amount is large, also easily causes the damage of electric capacity; Therefore,, for overcoming the above problems, urgently research and develop a new automated capacitive electric inductance measuring-testing instrument.
Summary of the invention
(1) technical matters that will solve
In order to address the above problem, the utility model proposes a kind of strong interference immunity, simple to operate and automated capacitive electric inductance measuring-testing instrument that precision is higher.
(2) technical scheme
Automated capacitive electric inductance measuring-testing instrument of the present utility model, comprises Industrial Frequency Transformer; Described Industrial Frequency Transformer input end access civil power; Its output terminal electrical connection capacitance group; Described capacitance group input end also and be connected to voltage amplifier; Described voltage amplifier is electrically connected to CPU by AD converter by buffer circuit; Described CPU is electrically connected respectively liquid crystal display, thermal printer and keyboard; Described AD converter is also electrically connected with the output terminal of current amplifier; The input end of described current amplifier is electrically connected pincerlike sample circuit; Described pincerlike sample circuit is installed on testing capacitance place.
Further, described current amplifier is programmable amplifier.
Further, described buffer circuit function photoelectric isolating circuit.
Further, described AD converter is made up of two groups of AD chip circuits.
(3) beneficial effect
Compared with prior art, it has following beneficial effect to the utility model: automated capacitive electric inductance measuring-testing instrument of the present utility model, adopts import high precision 16 8mm pincers type A
xtesting circuit, the voltage detecting circuit that coordinates numeral to isolate, stable performance, measuring accuracy is high; Instrument adopts big screen LCD backlight, and night on daytime all can clear observation.
Brief description of the drawings
Fig. 1 is one-piece construction schematic diagram of the present utility model.
Embodiment
Automated capacitive electric inductance measuring-testing instrument of the present utility model, comprises Industrial Frequency Transformer; Described Industrial Frequency Transformer input end access civil power; Its output terminal electrical connection capacitance group; Described capacitance group input end also and be connected to voltage amplifier; Described voltage amplifier is electrically connected to CPU by AD converter by buffer circuit; Described CPU is electrically connected respectively liquid crystal display, thermal printer and keyboard; Described AD converter is also electrically connected with the output terminal of current amplifier; The input end of described current amplifier is electrically connected pincerlike sample circuit; Described pincerlike sample circuit is installed on testing capacitance place.
Described current amplifier is programmable amplifier; Described buffer circuit function photoelectric isolating circuit; Described AD converter is made up of two groups of AD chip circuits.
The principle of work of automated capacitive electric inductance measuring-testing instrument of the present utility model: transformer output 20V or 2V test voltage, be connected to by p-wire on two bus-bars of capacitance group; Bus bar voltage is incorporated on the voltage detecting circuit of instrument internal through p-wire again; After AD converter becomes digital signal, by isolating device, signal is delivered to CPU; Testing capacitance C
xelectric current, through pincers types A
xafter sampling and program control amplification, become digital signal by AD converter, deliver to CPU and process.
Embodiment recited above is described preferred implementation of the present utility model, not design of the present utility model and scope is limited.Do not departing under the prerequisite of the utility model design concept; various modification and improvement that this area ordinary person makes the technical solution of the utility model; all should drop into protection domain of the present utility model; the technology contents of the utility model request protection, has all been documented in claims.
Claims (4)
1. an automated capacitive electric inductance measuring-testing instrument, is characterized in that: comprise Industrial Frequency Transformer; Described Industrial Frequency Transformer input end access civil power; Its output terminal electrical connection capacitance group; Described capacitance group input end also and be connected to voltage amplifier; Described voltage amplifier is electrically connected to CPU by AD converter by buffer circuit; Described CPU is electrically connected respectively liquid crystal display, thermal printer and keyboard; Described AD converter is also electrically connected with the output terminal of current amplifier; The input end of described current amplifier is electrically connected pincerlike sample circuit; Described pincerlike sample circuit is installed on testing capacitance place.
2. automated capacitive electric inductance measuring-testing instrument according to claim 1, is characterized in that: described current amplifier is programmable amplifier.
3. automated capacitive electric inductance measuring-testing instrument according to claim 1, is characterized in that: described buffer circuit function photoelectric isolating circuit.
4. automated capacitive electric inductance measuring-testing instrument according to claim 1, is characterized in that: described AD converter is made up of two groups of AD chip circuits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420147302.7U CN203894334U (en) | 2014-03-29 | 2014-03-29 | Automatic capacitance and inductance tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420147302.7U CN203894334U (en) | 2014-03-29 | 2014-03-29 | Automatic capacitance and inductance tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203894334U true CN203894334U (en) | 2014-10-22 |
Family
ID=51720716
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420147302.7U Expired - Fee Related CN203894334U (en) | 2014-03-29 | 2014-03-29 | Automatic capacitance and inductance tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203894334U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108761213A (en) * | 2018-09-05 | 2018-11-06 | 国网湖北省电力有限公司检修公司 | One kind being based on the micro- inductance comprehensive tester of ultra-high voltage converter station DC fields |
| CN108918981A (en) * | 2018-09-05 | 2018-11-30 | 国网湖北省电力有限公司检修公司 | One kind being based on the micro- inductance comprehensive tester of ± 500kV converter station DC fields |
-
2014
- 2014-03-29 CN CN201420147302.7U patent/CN203894334U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108761213A (en) * | 2018-09-05 | 2018-11-06 | 国网湖北省电力有限公司检修公司 | One kind being based on the micro- inductance comprehensive tester of ultra-high voltage converter station DC fields |
| CN108918981A (en) * | 2018-09-05 | 2018-11-30 | 国网湖北省电力有限公司检修公司 | One kind being based on the micro- inductance comprehensive tester of ± 500kV converter station DC fields |
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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: 20141022 Termination date: 20150329 |
|
| EXPY | Termination of patent right or utility model |