CN201852930U - Full-automatic measuring device for load box - Google Patents
Full-automatic measuring device for load box Download PDFInfo
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- CN201852930U CN201852930U CN2010205034603U CN201020503460U CN201852930U CN 201852930 U CN201852930 U CN 201852930U CN 2010205034603 U CN2010205034603 U CN 2010205034603U CN 201020503460 U CN201020503460 U CN 201020503460U CN 201852930 U CN201852930 U CN 201852930U
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- load box
- burden box
- box
- burden
- load
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Abstract
The utility model relates to a full-automatic measuring device for a load box, which comprises a controllable current source, a controllable voltage source, a microprocessor, a protective resistor, a switching circuit, a high-precision current transformer, a high-precision potential transformer and a load box adjusting mechanism. According to existing conventional load box detection operating principle, a load box rotating switch or a load box dial switch is controlled and adjusted automatically by means of automatically adjusting output value of the load box, manual adjusting and switching are replaced, detection for the load box needs no manual intervention and can be completed automatically within a shorter period of time, inconvenience caused by manual input and operation is reduced, and operating efficiency is increased greatly.
Description
Technical field
The utility model relates to a kind of Burden box Automatic Measuring Apparatus, belongs to the detection and the calibration technique field of power industry instrument and meter.
Background technology
Burden box be a kind of for electric power mutual-inductor calibrating or the verification test provides necessary load value, to finish the measurement mechanism that detects transformer error, detect the accuracy of error in order to guarantee mutual inductor, Burden box must satisfy the permissible error of national regulation.Burden box component voltage Burden box, two types in current capacity case, in order to improve its accuracy of measurement, the Burden box automatic measuring instrument is adopted in the calibration operation of present domestic mutual inductor Burden box basically, by electric current being provided and measuring current capacity case terminal voltage value, or provide the mode of voltage and measuring voltage Burden box current value, reach and measure Burden box load value purpose, and the voltage that provides according to the size adjustment of load value, size of current, to obtain higher measuring accuracy, also need difference in the measuring process according to tested object numerical value, different gears on the switchable load case, measuring accuracy and figure place showing are guaranteed, automatically extrapolate the volt-ampere number of current Burden box at last according to the result who measures, power factor, error, the inconvenience that reduces artificial input and bring because of operation, and can realize providing various report with computer interconnection, function such as certificate and data management.
The measurement mechanism of current existing Burden box, need adjust Burden box rotary switch or dial switch manually, output valve when measuring different gear, gear is adjusted in one of every measurement again one time, limited the lifting of surveying work efficient, if a kind of device that can adjust switchable load case rotary switch or dial switch is automatically arranged, the surveying work efficient of Burden box is promoted greatly.
Summary of the invention
The purpose of this utility model is to overcome the deficiency of adjusting the Burden box gear in the background technology manually, being unfavorable for the work efficiency raising, propose a kind of according to existing conventional detection load case principle, adopt the method for regulating the Burden box output valve automatically, automatically Burden box rotary switch or dial switch are adjusted in control, substitute artificial the adjustment and switch, improve the surveying work efficient of Burden box.
The technical solution of the utility model is: a kind of Burden box Automatic Measuring Apparatus; it is by controllable current source; controllable voltage source; microprocessor; protective resistance; commutation circuit; high precision CT and PT; the Burden box governor motion is formed; it is characterized in that: described Burden box governor motion; by motor; rotating disk; trace; slide bar; position limiting pile; mobile cabin is formed; motor is connected with rotating disk; one end of trace links to each other with rotating disk; the other end is connected with mobile cabin upper hinge formula; slide bar is passed on top, mobile cabin; its underpart is enclosed within Burden box and switches on the dial switch of gear; the slide bar two ends also have position limiting pile; its beneficial effect is: adopt to be similar to piston rod cylinder transmission principle; when motor rotates under microprocessor control; the rotation of drive rotating disk; pulling trace and mobile cabin move back and forth about on the slide bar; thereby the control dial switch is at I number; II number; III backhauls row on the position; can export by change of load case load value; make the verification process of Burden box need not manual intervention; and can finish automatically in the short period of time; the inconvenience that reduces artificial input and bring because of operation has greatly improved work efficiency.
Description of drawings
Synoptic diagram when accompanying drawing 2 is parked in the I position for the Burden box governor motion;
Synoptic diagram when accompanying drawing 3 is parked in the II position for the Burden box governor motion;
Synoptic diagram when accompanying drawing 4 is parked in the III position for the Burden box governor motion;
Accompanying drawing 5 is the current waveform synoptic diagram of anticipation flow process monitoring.
Embodiment
Mark in the accompanying drawing:
In the accompanying drawing, the 1-commutation circuit, the 2-Burden box, the 3-governor motion, the 4-position limiting pile, the 5-slide bar, the 6-rotating disk, the 7-motor, the 8-trace, 9-moves the cabin, the 10-dial switch.
Below in conjunction with accompanying drawing the utility model embodiment is further specified:
As accompanying drawing 1 is Burden box all automatic measurement schematic diagram, controllable current source and controllable voltage source can be powered to Burden box respectively among the figure, microprocessor is the overhead control device, but overall process data analysis, storage, record and printing, R is the protective resistance in protective current source, commutation circuit 1 switches controllable current source or controllable voltage source is powered to Burden box, and high precision CT and high precision PT are for measuring Burden box real-time current and real-time voltage; As accompanying drawing 2 is the Burden box governor motion, form by motor 7, rotating disk 6, trace 8, slide bar 5, position limiting pile 4, mobile cabin 9 and dial switch 10, motor 7 is connected with rotating disk 6, one end of trace 8 links to each other with rotating disk 6, the other end is connected with mobile cabin 9 upper hinge formulas, slide bar 5 is passed on 9 tops, mobile cabin, and its underpart is enclosed within Burden box switches on the dial switch 10 of gear, and slide bar 5 two ends also have position limiting pile 4.
Before the measurement, be connected with Burden box by artificial p-wire the Burden box Automatic Measuring Apparatus, governor motion is docked with Burden box according to the numbering direction, and governor motion is set on computers controls the size, parameters such as state of a control position, by the checker dial switch 10 being placed on governor motion again moves in the cabin 9, click then and begin to measure, after measuring beginning, little processing controls motor 7 rotations, rotating disk 6 rotates by the mobile cabin 9 of trace 8 drives and do rectilinear motion back and forth on slide bar 5, thereby may command dial switch 10 stops at I number, on II number or the III position, that is be the different load value of adjusting Burden box, control magnitude of voltage that amplitude is less than normal of commutation circuit 1 and voltage source output again, Burden box is measured.Microprocessor carries out the A/D conversion by sampling high precision CT and high precision PT secondary output valve, and calculated load case load value proportionally, finishes and declares at the beginning of load value carried out.By the contrast preset database, access the voltage/current metering system and the voltage/current value of load value correspondence, control commutation circuit and voltage source/current source, the voltage/current value that output is accurately measured is carried out the measurement of further degree of precision.After measuring a gear and finishing, regulating and controlling mechanism adjusts the next load value of Burden box, finishes until all gear measurements.After surveying work was finished, microprocessor contrast Burden box error range database was judged measurement data whether in the database scope, and the nominal value of reckoning measurement data correspondence.With the nominal value of measured value and reckoning, be presented on the mode bit of governor motion correspondence then, notify the checker, whether the nominal value that shows on each mode bit of verification computer governor motion is consistent with nominal value on the Burden box.Verify unanimity as a result, the checker examines measurement result, enters the certificate auditing flow; The verification result is inconsistent, and the checker revises the nominal value of reckoning on computers, the nominal value that computing machine is revised according to the checker, and whether overproof, provide conclusion again if rejudging measured value, and the checker examines measurement result, enters the certificate auditing flow.
For adopting rotary switch to regulate the Burden box of load value, fixed mechanism can be linked to each other with motor, the control motor is realized the adjusting of Burden box load value, and in rotary switch rotation stem and afterbody limit switch is set, and forms closed-loop control, the protection rotary switch.Rotary switch pattern Burden box is owing to load quantity adjustable in circumference is inconsistent, the load value gear has very big uncertainty, its governor motion is difficult to accomplish that each gear all has clear and definite position indication, need carry out anticipation to Burden box load value gear, load value gear anticipation flow process is: at first by voltage that amplitude is less of microprocessor control voltage source output, control motor again with slower speed V rotation, under the effect of limit switch, control gear can be finished the switching of all load values, and the current waveform that microprocessor is gathered as shown in Figure 5.
Microprocessor monitors to current waveform change along with the variation of load value, microprocessor is by the moment of record electric motor starting and limit switch action, calculate the time T of whole flow process, and from the data sequence that monitors, analyze the zero crossing and the zero point of current waveform, the data sequence at zero point is as rotary switch gear switch point continuously, data sequence between the sequence at zero point is the stable electrical flow valuve of a certain load value under predicted voltage continuously, microprocessor calculates the data number between the sequence at zero point, multiply by the data sampling computation of Period and go out time t, and choose in the middle of the data sequence data sequence between two positive going zeror crossing points, primary Calculation load value size.Time t determines, has determined the position of the gear of respectively loading basically, and microprocessor control motor can arrive the load gear of appointment with the integral multiple of speed V rotation t when accurately measuring, and stops the motor rotation, accurately measures this load gear load value.
Claims (1)
1. Burden box Automatic Measuring Apparatus; it is made up of controllable current source, controllable voltage source, microprocessor, protective resistance, commutation circuit, high precision CT and PT, Burden box governor motion; it is characterized in that: described Burden box governor motion; form by motor, rotating disk, trace, slide bar, position limiting pile, mobile cabin; motor is connected with rotating disk; one end of trace links to each other with rotating disk; the other end is connected with mobile cabin upper hinge formula; slide bar is passed on top, mobile cabin; its underpart is enclosed within Burden box switches on the dial switch of gear, and the slide bar two ends also have position limiting pile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205034603U CN201852930U (en) | 2010-08-25 | 2010-08-25 | Full-automatic measuring device for load box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205034603U CN201852930U (en) | 2010-08-25 | 2010-08-25 | Full-automatic measuring device for load box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201852930U true CN201852930U (en) | 2011-06-01 |
Family
ID=44095318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205034603U Expired - Fee Related CN201852930U (en) | 2010-08-25 | 2010-08-25 | Full-automatic measuring device for load box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201852930U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101950010A (en) * | 2010-08-25 | 2011-01-19 | 国网电力科学研究院武汉南瑞有限责任公司 | Full-automatic measuring device of load tank |
| CN102411134A (en) * | 2011-12-05 | 2012-04-11 | 沈阳计量测试院 | Variable frequency calibration device for load box of mutual inductor |
-
2010
- 2010-08-25 CN CN2010205034603U patent/CN201852930U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101950010A (en) * | 2010-08-25 | 2011-01-19 | 国网电力科学研究院武汉南瑞有限责任公司 | Full-automatic measuring device of load tank |
| CN101950010B (en) * | 2010-08-25 | 2013-03-06 | 国网电力科学研究院武汉南瑞有限责任公司 | Full-automatic measuring device of load tank |
| CN102411134A (en) * | 2011-12-05 | 2012-04-11 | 沈阳计量测试院 | Variable frequency calibration device for load box of mutual inductor |
| CN102411134B (en) * | 2011-12-05 | 2013-07-17 | 沈阳计量测试院 | Variable frequency calibration device for load box of mutual inductor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110601 Termination date: 20130825 |