CN202025044U - Portable current transformer detector - Google Patents
Portable current transformer detector Download PDFInfo
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- CN202025044U CN202025044U CN2011201147927U CN201120114792U CN202025044U CN 202025044 U CN202025044 U CN 202025044U CN 2011201147927 U CN2011201147927 U CN 2011201147927U CN 201120114792 U CN201120114792 U CN 201120114792U CN 202025044 U CN202025044 U CN 202025044U
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- 230000010354 integration Effects 0.000 claims description 3
- 230000005611 electricity Effects 0.000 abstract description 5
- 238000001514 detection method Methods 0.000 abstract description 4
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- 238000007596 consolidation process Methods 0.000 abstract 1
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Abstract
The utility model discloses a portable low voltage current transformer transformation ratio detector which belongs to an electric power detecting instrument, namely, special electricity utilization detecting equipment. The detector comprises a primary current parameter sampler and a secondary current parameter sampler which are arranged in a power supply system being 380/220V, as well as a main machine and data transmission lines, wherein two groups of data transmission lines are respectively connected with the primary current parameter sampler and the secondary current parameter sampler, and are connected into a central processing unit by respective current sampler circuits, and a detecting result is displayed by a liquid crystal display after data consolidation. The detector can conveniently and fast realize an online field test on a current transformer in a metering device, and can carry out detection on current and leakage current quantity values of electric equipment. The detector can accurately detect current transformer transformation ratio, errors, polarities and accuracy in actual running process without power failure, thus providing a novel electric power instrument which is safe, accurate, convenient and fast for an electricity utilization testing personnel; therefore, the detector can bring remarkable economic benefits and social benefits for electric power enterprises.
Description
Technical field
Portable low-voltage current mutual inductor no-load voltage ratio detector belongs to the electric power detecting instrument---electricity consumption detection type specialized equipment.
Background technology
In 380/220 volt of electric power system of electric power enterprise, the no-load voltage ratio of current transformer, precision directly have influence on electric energy and accurately measure in the electricity consumption measuring apparatus.Wherein private moving measuring apparatus, change the current transformer famous brand, replace with current mutual inductor with high transforming ratio that little transformation ratio current transformer is carried out the technology stealing, current transformer unaccelerated aging in service all has influence on accurate metering, on-the-spot routine inspection is difficult to find these hidden danger, at present, domestic electricity market is not specifically designed to on-the-spot test low-voltage current mutual inductor no-load voltage ratio and precision testing device.The general equipment such as pincers type reometer or measuring apparatus comprehensive tester that adopt, use pincers type reometer respectively test run mesolow current transformer once with secondary current then, converting obtains the approximate current mutual inductor ratio.Because electric system is in dynamic process all the time, the error amount of this method of testing is very big, composition error testing tool volume heaviness, be unfavorable for on-the-spot test and exist trueness error bigger.Existing equipment can't satisfy on-the-spot detection demand.
Summary of the invention
The purpose of this utility model is to fill up a blank of domestic power utility check apparatus field, for the electricity consumption testing provides that a kind of volume is little, measuring accuracy is high, carry out a kind of safe, power instrument accurately under the situation of uninterrupted power supply.
The utility model is to be achieved through the following technical solutions:
A kind of portable type current transformer detector is by being in 380/220 volt of primary current parameter sampling device, secondary current parameter sampling device in the electric power system, and main frame and data line are formed.The port of main frame connects primary current parameter sampling device and secondary current parameter sampling device respectively to picking out two groups of data lines.Primary current parameter sampling device and secondary current parameter sampling the device data line by separately respectively are input to primary current sampling thief circuit and secondary current sampling thief circuit in the main frame with sampled signal; Primary current sampling thief circuit and secondary current sampling thief circuit output end are connected to central processing unit, in central processing unit, input signal is judged current amplitude and phase angle through two road A/D change-over circuits, through data integration, the output terminal of central processing unit is connected to liquid crystal display circuit, demonstrates test result by liquid crystal display.In main frame, also have an open and close machine control circuit, it is connected with liquid crystal display circuit with central processing unit by positive and negative power circuit.
The utility model is easy to carry, and is easy to use, can test the low-voltage current mutual inductor no-load voltage ratio at the scene.The utility model design is easy, the accuracy of detection height, can be widely used in 380/220 volt of electric power system, can convenient, fast realization online current transformer in the measuring apparatus be carried out on-the-spot detect and to the electric current of consumer, the mensuration of leakage current value, having realized need not having a power failure just accurately to test out current transformer ratio, error, polarity and precision in the actual motion.For the power utility check personnel provide a kind of safe, accurately, novel electric power instrument easily, will bring remarkable economic efficiency and social benefit to electric power enterprise.
Description of drawings
Fig. 1 is an equipment elementary diagram of the present utility model;
Fig. 2 is circuit theory diagrams of the present utility model;
Fig. 3 is the utility model testing apparatus leakage current value wiring diagram;
Fig. 4 is the utility model test earth leakage stream charge value wiring diagram.
Among the figure: 1, main frame, 2, the primary current sampling thief, 3, the secondary current sampling thief, 4, primary current sampling thief circuit, 5, secondary current sampling thief circuit, 6, central processing unit, 7, liquid crystal display circuit, 8, open and close machine control circuit, 9, positive and negative power circuit.
Embodiment
Referring to Fig. 1, Fig. 2, a kind of portable type current transformer detector of the utility model, be by being in 380/220 volt of primary current parameter sampling device 2 (CT1), secondary current parameter sampling device 3 (CT2) in the electric power system, and main frame 1 and data line 10 are formed.The port of main frame 1 connects primary current parameter sampling device 2 and secondary current parameter sampling device 3 respectively to picking out two groups of data lines 10.Primary current parameter sampling device 2 and secondary current parameter sampling device 3 all are pincers type current parameters sampling thiefs.Primary current parameter sampling device 2 and secondary current parameter sampling device 3 are input to sampled signal primary current sampling thief circuit 4 and secondary current sampling thief circuit 5 in the main frame 1 respectively by data line 10; Primary current sampling thief circuit 4 and secondary current sampling thief circuit 5 output terminals are connected to central processing unit 6 (CPU), in central processing unit 6, input signal is judged current amplitude and phase angle through two road A/D change-over circuits, through data integration, the output terminal of central processing unit 6 is connected to liquid crystal display circuit 7, demonstrates test result by liquid crystal display.In the embodiment shown in Figure 2, the model of central processing unit 6 is TMS320F2810.
In main frame 1, also have an open and close machine control circuit 8, it is connected with liquid crystal display circuit 7 with central processing unit 6 by positive and negative power circuit 9.
In the embodiment shown in fig. 1, detected circuitry is made up of 3 low-voltage current mutual inductors and a three-phase electric energy meter.The utility model inserts any phase among detected loop A, B, the C, when current transformer ratio detects, primary current parameter sampling device 2 (CT1) embeds the primary current loop, secondary current parameter sampling device 3 (CT2) embeds secondary circuit, when detecting current transformer ratio, once, the secondary current sampling thief need clamp into same phase.
CT1, CT2 are with the central processing unit 6 of the analog signal data input main frame of collection, and by the A/D conversion Calculation, host display shows detected first and second loop current size, shows with the secondary back electric current to be the conversion ratio of 5A simultaneously.
The test of this detector polarity is: with reference to figure 1, as: CT1, CT2 embed first and second loop of sensed current mutual inductor respectively, screen display: with
, represent same identical polar.CT1, CT2 embed the current transformer of reversed polarity, and screen can show: same Θ, represent same opposite polarity.
This detector detects the measuring apparatus wiring: with reference to figure 1, CT1, CT2 embed different phase times, and screen display is different
, represent that detected current transformer is a positive polarity, the measuring apparatus wiring is an out-phase, and the different Θ of screen display represents that detected current transformer is a reversed polarity, and the measuring apparatus wiring is an out-phase.
This detector detects the test of current magnitude and leakage current, according to consumer actual electrical flow, selects with CT1 or CT2 test, respectively with reference to figure 3 and Fig. 4 mode of connection.
With reference to figure 2, the explanation of this detector circuit theory:
1, power circuit: by the switching on and shutting down control circuit ,+the 5V mu balanced circuit ,+the 3.3V mu balanced circuit ,-the 3V mu balanced circuit forms.Power supply is made up of No. 5 batteries of 4 joints, i.e. 6V power supply.The U3 diode protection prevents that the battery dress is anti-; Press the S1 key, give the power supply of T11 base stage by D5, R59, the T11 conducting drags down the T10 base stage, T10 work output VCC power supply; For CUP and IC1 positive supply, VCC is by the negative supply of IC7 output-33V power supply for IC1 by U4 output+3.3V power supply for VCC; VCC powers for LCD by U5 output+5V power supply.When pressing the S1 key, give starting-up signal of 4 pin input of CPU, high signal of CPU14 pin output is kept the T11 conducting by D6, keeps start.In like manner, press S1 again and give off signal, low signal of CPU14 pin output, T11, T10 end, start.
2, CT1, CT2 input treatment circuit, two-way detect respectively current transformer once with the electric current of secondary circuit, R1, R7 sampling, IC1 sends out greatly, R5, C3, R6 and R11, C6, R12 form filtering circuit, signal is imported 60 pin of CPU respectively in 3 pin, judges current amplitude and phase angle by 2 road A/D, the CUP processes and displays once with electric current, no-load voltage ratio, the polarity of secondary circuit.
Claims (3)
1. portable type current transformer detector is by being in 380/220 volt of primary current parameter sampling device, secondary current parameter sampling device in the electric power system, and main frame and data line are formed; It is characterized in that: the port of main frame connects primary current parameter sampling device and secondary current parameter sampling device respectively to picking out two groups of data lines; Primary current parameter sampling device and secondary current parameter sampling the device data line by separately respectively are input to primary current sampling thief circuit and secondary current sampling thief circuit in the main frame with sampled signal; Primary current sampling thief circuit and secondary current sampling thief circuit output end are connected to central processing unit, in central processing unit, input signal is judged current amplitude and phase angle through two road A/D change-over circuits, through data integration, the output terminal of central processing unit is connected to liquid crystal display circuit, demonstrates test result by liquid crystal display; In main frame, also have an open and close machine control circuit, it is connected with liquid crystal display circuit with central processing unit by positive and negative power circuit.
2. portable type current transformer detector according to claim 1 is characterized in that: primary current parameter sampling device and secondary current parameter sampling device all are pincers type current parameters sampling thiefs.
3. portable type current transformer detector according to claim 1 is characterized in that: the model of central processing unit is TMS320F2810.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201147927U CN202025044U (en) | 2011-04-19 | 2011-04-19 | Portable current transformer detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201147927U CN202025044U (en) | 2011-04-19 | 2011-04-19 | Portable current transformer detector |
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| Publication Number | Publication Date |
|---|---|
| CN202025044U true CN202025044U (en) | 2011-11-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011201147927U Expired - Fee Related CN202025044U (en) | 2011-04-19 | 2011-04-19 | Portable current transformer detector |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103217083A (en) * | 2013-03-24 | 2013-07-24 | 朱明� | Explosive wire-checking instrument |
| CN104064081A (en) * | 2014-05-30 | 2014-09-24 | 国家电网公司 | Fault simulating training device of current transformer |
| CN104122483A (en) * | 2014-08-05 | 2014-10-29 | 国家电网公司 | Special current transformer transformation ratio detector for busbar |
| CN104215927A (en) * | 2014-09-02 | 2014-12-17 | 国家电网公司 | Multifunctional mutual inductor tester |
| CN104297549A (en) * | 2014-09-11 | 2015-01-21 | 国家电网公司 | Flexible pliers-shaped current tester |
| CN104730480A (en) * | 2013-12-19 | 2015-06-24 | 国家电网公司 | Calibration device and system of split core type current transformer |
| CN105785305A (en) * | 2014-12-15 | 2016-07-20 | 国网山东齐河县供电公司 | Portable on-site check meter for current transformer |
-
2011
- 2011-04-19 CN CN2011201147927U patent/CN202025044U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103217083A (en) * | 2013-03-24 | 2013-07-24 | 朱明� | Explosive wire-checking instrument |
| CN104730480A (en) * | 2013-12-19 | 2015-06-24 | 国家电网公司 | Calibration device and system of split core type current transformer |
| CN104730480B (en) * | 2013-12-19 | 2017-10-27 | 国家电网公司 | The calibration equipment and system of split core type current transformer |
| CN104064081A (en) * | 2014-05-30 | 2014-09-24 | 国家电网公司 | Fault simulating training device of current transformer |
| CN104064081B (en) * | 2014-05-30 | 2016-05-18 | 国家电网公司 | Current mulual inductor malfunction simulation and training device |
| CN104122483A (en) * | 2014-08-05 | 2014-10-29 | 国家电网公司 | Special current transformer transformation ratio detector for busbar |
| CN104215927A (en) * | 2014-09-02 | 2014-12-17 | 国家电网公司 | Multifunctional mutual inductor tester |
| CN104297549A (en) * | 2014-09-11 | 2015-01-21 | 国家电网公司 | Flexible pliers-shaped current tester |
| CN105785305A (en) * | 2014-12-15 | 2016-07-20 | 国网山东齐河县供电公司 | Portable on-site check meter for current transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: DAQING ELECTRIC POWER ADMINISTRATION Free format text: FORMER OWNER: WANG LIJUN Effective date: 20120524 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20120524 Address after: 163458 Heilongjiang Province, Daqing City Ranghulu District No. 409 South Central Avenue Patentee after: Daqing Electric Power Bureau Address before: 163458 Heilongjiang Province, Daqing City Ranghulu District Ranghulu Power Supply Bureau Patentee before: Wang Lijun |
|
| ASS | Succession or assignment of patent right |
Owner name: STATE GRID CORPORATION OF CHINA Effective date: 20121220 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20121220 Address after: 163458 Heilongjiang Province, Daqing City Ranghulu District No. 409 South Central Avenue Patentee after: Daqing Electric Power Bureau Patentee after: State Grid Corporation of China Address before: 163458 Heilongjiang Province, Daqing City Ranghulu District No. 409 South Central Avenue Patentee before: Daqing Electric Power Bureau |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111102 Termination date: 20190419 |