CN107621622A - A kind of three-phase low-voltage electric energy meter field check meter - Google Patents

A kind of three-phase low-voltage electric energy meter field check meter Download PDF

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Publication number
CN107621622A
CN107621622A CN201710849160.7A CN201710849160A CN107621622A CN 107621622 A CN107621622 A CN 107621622A CN 201710849160 A CN201710849160 A CN 201710849160A CN 107621622 A CN107621622 A CN 107621622A
Authority
CN
China
Prior art keywords
electric energy
phase
energy meter
meter
current transformer
Prior art date
Application number
CN201710849160.7A
Other languages
Chinese (zh)
Inventor
臧海河
李攀峰
王黎
于心俊
Original Assignee
河南工业大学
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 河南工业大学 filed Critical 河南工业大学
Priority to CN201710849160.7A priority Critical patent/CN107621622A/en
Publication of CN107621622A publication Critical patent/CN107621622A/en

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Abstract

The present invention relates to a kind of three-phase low-voltage electric energy meter field check meter, including three-phase hook type current transformer, threephase potential transformer, three-phase electrical energy computation chip, single-chip microcomputer, photoelectric sampler, liquid crystal display, keyboard, mini-printer, described three-phase hook type current transformer is three 100A jaw type precision current transformer, threephase potential transformer is three 380V accurate voltage mutual inductor, three-phase electrical energy computation chip is ADE7758, single-chip microcomputer is AT89S51, photoelectric sampler is absorption type electric energy meter detection photoelectric sampler, liquid crystal display is character formula liquid crystal display LCD1602, keyboard is the determinant keyboard of 16 buttons, mini-printer is the embedded micro thermal printer with TTL serial ports.The present invention is reasonable in design, and accuracy of detection is high, may be implemented in do not have a power failure, do not take out stitches in the case of field test is carried out to three-phase low-voltage electric energy meter.

Description

A kind of three-phase low-voltage electric energy meter field check meter

Technical field

The present invention relates to electronic technology field, especially a kind of three-phase low-voltage electric energy meter field check meter.

Background technology

For a long time, many power consumers be present by slowing down the phenomenons of the various mode stealings such as electric energy meter, to power supply Door causes huge economic loss, and three-phase low-voltage electric energy meter field check meter is a kind of instrumentation, can be applied to basic unit's confession Electric department carries out field test in the case where not having a power failure, do not take out stitches for the three-phase low-voltage electric energy meter of industrial and mining enterprises, so as to sentence Whether the electric energy meter metering for determining user is accurate.

The content of the invention

The present invention devises a kind of three-phase low-voltage electric energy meter field check meter, can realize and three-phase low-voltage electric energy meter is measured Whether field test is accurately carried out in the case where not having a power failure, do not take out stitches.

The technical solution adopted for the present invention to solve the technical problems is:A kind of three-phase low-voltage electric energy meter field check meter, Including three-phase hook type current transformer, threephase potential transformer, three-phase electrical energy computation chip, single-chip microcomputer, photoelectric sampler, liquid crystal Display, keyboard, mini-printer, described three-phase hook type current transformer are three 100A jaw type precision current mutual inductance Device, described threephase potential transformer are three 380V accurate voltage mutual inductor, and described three-phase electrical energy computation chip is ADE7758, described single-chip microcomputer are AT89S51, and described photoelectric sampler is absorption type electric energy meter detection photoelectric sampler, Described liquid crystal display is character formula liquid crystal display LCD1602, and described keyboard is the determinant keyboard of 16 buttons, institute The mini-printer stated is the embedded micro thermal printer with TTL serial ports.

The invention has the advantages that:The present invention is reasonable in design, and cost is cheap, and accuracy of detection is high, may be implemented in not Power failure, field test is carried out to three-phase low-voltage electric energy meter in the case of not taking out stitches.

Brief description of the drawings

Fig. 1 is the structural representation of the present invention.

Embodiment

The present invention is described in detail below below in conjunction with the accompanying drawings.

As shown in drawings, described single-chip microcomputer 1 respectively with three-phase electrical energy computation chip 4, pulse input interface 6, liquid crystal Show that device 7, keyboard 8, mini-printer 9 are connected.Described three-phase electrical energy computation chip 4 is ADE7758, suitable for metering various three Active and reactive and apparent electric energy under the conditions of phase configuration, and voltage, current effective value are provided;Described pulse input interface 6 is Phototube Coupling and the step-by-step counting input interface of level conversion function are had concurrently using what high speed photo coupling 6N137 was formed, utilize monolithic The pulse number that counter inside machine exports to photoelectric sampler 5 or tested electronic electric energy meter counts.

Described three-phase hook type current transformer 2 is three 100A jaw type precision current transformer, convenient not have a power failure, no Wiring is tested;Described threephase potential transformer 3 is three 380V accurate voltage mutual inductor, suitable for three-phase three-wire system Electric power system;Described photoelectric sampler 5 is absorption type electric energy meter detection photoelectric sampler, for entering to rotating disc type electric energy meter Performing check;Described liquid crystal display 7 is character formula liquid crystal display LCD1602, for split screen display available relevant parameter and measurement As a result;Described mini-printer 9 is the embedded micro thermal printer with TTL serial ports, for printing assay.

Described keyboard 8 is the determinant keyboard of 16 buttons, respectively 10 " numerical key 0-9 ", 1 " settings " key with 1 " confirmation " key, for inputting every kilowatt hour umber of pulse of tested electric energy meter and count pulse number operation during automatic examine;1 Individual " automatic " key, the key is pressed when examining automatically, start automatic inspection, reach pre- from the umber of pulse of the input of pulse input interface 6 If during umber of pulse, it is automatically stopped and calculates the error for showing tested electric energy meter;1 " manual " key, is opened when pressing " manual " key Begin to examine, stop examining and calculating the error for showing tested electric energy meter when pressing " manual " key again;1 " parameter is checked " Key, for retrieving for examination the parameters such as electric current, the virtual value of voltage and power factor;1 " printing " key, the printing for assay; The reset that one RESET key is used for single-chip microcomputer operates.

, it is necessary to pre-enter every kilowatt hour umber of pulse of tested electric energy meter and counting during automatic examine before starting to examine Umber of pulse, every kilowatt hour umber of pulse that " setting " key display prompts input tested electric energy meter first is pressed, according to tested electric energy The nameplate data of table utilize the corresponding data of digital key input, press the memory that " confirmation " key is stored it in inside single-chip microcomputer In, while display prompts input automatic count pulse number when examining, and the data needed using digital key input, press again " confirmation " key is stored and completes to set.

During automatic inspection, " automatic " key is pressed, starts to measure actual power, while to photoelectric sampler or electronic watt-hour The umber of pulse of table output is counted, and when counting down to predetermined pulse number, stops the metering of actual power, using actual power as base Quasi- value, compared with the electric energy that the conversion of predetermined pulse number is drawn, the relative error of tested electric energy meter is calculated and displayed.

" manual " key during manual inspections, is pressed, starts to measure actual power, while to photoelectric sampler or electronic watt-hour The umber of pulse of table output is counted, and when pressing " manual " key again, stops the metering of actual power, using actual power as base Quasi- value, compared with the electric energy that the umber of pulse conversion counted to get is drawn, the relative of tested electric energy meter is calculated and displayed and misses Difference.

Hook type current transformer is influenceed by magnetic circuit opening, and the signal of output has delayed phase phenomenon, and size of current is not Phase with hysteresis is also differed, it is necessary to section linear compensating be carried out to power factor according to size of current, to improve what is examined Accuracy.

Claims (2)

1. a kind of three-phase low-voltage electric energy meter field check meter, including three-phase hook type current transformer, threephase potential transformer, three-phase Electric energy computation chip, single-chip microcomputer, photoelectric sampler, pulse input interface, liquid crystal display, keyboard, mini-printer, it is described Three-phase hook type current transformer is three 100A jaw type precision current transformer, and described threephase potential transformer is three 380V accurate voltage mutual inductor, described three-phase electrical energy computation chip are ADE7758, and described single-chip microcomputer is AT89S51, institute The photoelectric sampler stated is absorption type electric energy meter detection photoelectric sampler, and described pulse input interface couples for high speed optoelectronic Device 6N137, described liquid crystal display are character formula liquid crystal display LCD1602, and described keyboard is the ranks of 16 buttons Formula keyboard, described mini-printer are the embedded micro thermal printer with TTL serial ports.
A kind of 2. three-phase low-voltage electric energy meter field check meter according to claim 1, it is characterised in that:In terms of three-phase electric energy Amount chip ADE7758 on the basis of the actual power measured in certain time to being worth, while to being detected electronic electric energy meter output Pulse is counted and is converted into electric energy, and the error of the tested electric energy meter calculated using single-chip microcomputer is simultaneously shown and printed, If tested electric energy meter is rotating disc type electric energy meter, it is sampled by photoelectric sampler, its rotating disk is often rotated output one in one week Individual pulse, it live can not be had a power failure using hook type current transformer, do not take out stitches and test.
CN201710849160.7A 2017-09-20 2017-09-20 A kind of three-phase low-voltage electric energy meter field check meter CN107621622A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710849160.7A CN107621622A (en) 2017-09-20 2017-09-20 A kind of three-phase low-voltage electric energy meter field check meter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710849160.7A CN107621622A (en) 2017-09-20 2017-09-20 A kind of three-phase low-voltage electric energy meter field check meter

Publications (1)

Publication Number Publication Date
CN107621622A true CN107621622A (en) 2018-01-23

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710849160.7A CN107621622A (en) 2017-09-20 2017-09-20 A kind of three-phase low-voltage electric energy meter field check meter

Country Status (1)

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CN (1) CN107621622A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2938136Y (en) * 2006-08-29 2007-08-22 宋国元 Electric energy field detector with virtual loading
CN106093841A (en) * 2016-08-25 2016-11-09 海盐星创电子有限公司 A kind of hand-held electric energy meter on-site calibrator
CN205941878U (en) * 2016-08-25 2017-02-08 海盐星创电子有限公司 On --spot check gauge of hand -held type electric energy meter

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2938136Y (en) * 2006-08-29 2007-08-22 宋国元 Electric energy field detector with virtual loading
CN106093841A (en) * 2016-08-25 2016-11-09 海盐星创电子有限公司 A kind of hand-held electric energy meter on-site calibrator
CN205941878U (en) * 2016-08-25 2017-02-08 海盐星创电子有限公司 On --spot check gauge of hand -held type electric energy meter

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