CN2262711Y - Transformer loss intelligent tester - Google Patents
Transformer loss intelligent tester Download PDFInfo
- Publication number
- CN2262711Y CN2262711Y CN 95224100 CN95224100U CN2262711Y CN 2262711 Y CN2262711 Y CN 2262711Y CN 95224100 CN95224100 CN 95224100 CN 95224100 U CN95224100 U CN 95224100U CN 2262711 Y CN2262711 Y CN 2262711Y
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- China
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- display window
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- transformer
- utility
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- Expired - Fee Related
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- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The utility model provides an intelligent tester for transformer loss, which comprises a host machine (1), a current mutual inductor (14) and two cables (10, 11) thereof which are connected into integration, wherein the host machine (1) is composed of a casing, a printed circuit board (4) and a miniature printer (3) which are fixed on a bottom board of the host machine and are provided with single chip microcomputer system circuits, and a display window (6) and a man-computer conversation keyboard (7) which are distributed on a panel of the host machine. The utility model is suitable for monitoring and reforming transformers with high energy consumption and can also be used as an electric balance tester. The utility model has the advantages of integrative structure, intelligent work, portability and convenient use. The testing accuracy of electric current, electric voltage and frequency is in grade one, and one time of testing can be completed in a few minutes.
Description
The utility model relates to the transformer performance tester, and especially a kind of transformer loss intelligent tester is applicable to transformer with high energy consumption monitoring and transformation and transformer fault diagnosis.
Existing transformer loss tester, it mostly is the loose composite set of low power factor power meter, voltage table, reometer and pressure regulator, itself do not possess the compensation of frequency measurement compensation and mutual inductor angular difference, need the number people to carry out artificial meter reading, record, pressure regulation, calculating and accounting etc. simultaneously respectively during test, need could survey with a few hours, so not only equipment disperses, and inconvenience portably uses, and test loaded down with trivial details, time-consuming, easily make mistakes, be difficult to guarantee to monitor the accuracy of transformer loss data.
In view of there is above-mentioned shortcoming in prior art, the purpose of this utility model provides a kind of transformer loss intelligent tester.Not only complete machine structure is integrated for it, the use that is easy to carry, and the test process intellectuality, save time the measuring accuracy height.
The purpose of this utility model adopts micro-computer technology, electric current, one number (A/D) switch technology, the frequency measurement compensation of voltage binary channels mould and accuracy of instrument collimation technique, parameter show automatically, printing technique is finished.
The technical solution of the utility model is that testing power supply is added on electric current, the voltage transformer (VT), its output signal is added to respectively on electric current, the voltage channel A/D converter, compensate through frequency measurement, under microsystem control, carry out mould-number conversion of signals, send into microsystem and handle and the calibration of accuracy of instrument calibration circuit, send into demonstration and printing in display and the printer again, obtain test result.
Ingredient of the present utility model comprise one by casing, be fixed on printed circuit board (PCB) that has the single-chip microprocessor system circuit and mini-printer on its base plate, be distributed in main frame that display window on its panel and person-machine dialogue keyboard form and a current transformer and cable that both are connected as a single entity thereof.
Because adopt such scheme, the utility model has significant technical progress and positive effect than prior art.Not only it is structure-integrated, volume is little for it, in light weight, use is easy to carry, and under computer control, the basic test project is many, test speed is fast, a few minutes are finished a test, electric current, voltage, frequency test precision reach 1 grade, other measuring accuracy reaches 1.5 grades, also can be used as the electrobalance tester and uses.
Further specify the utility model below in conjunction with accompanying drawing.
Fig. 1 is the utility model design frame chart.
Fig. 2 is a kind of principle of work circuit diagram of Fig. 1.
Fig. 3 is the utility model complete machine structure (band part section) schematic perspective view and specification digest accompanying drawing.
Fig. 4 is display window among Fig. 3 (6) and keyboard (7) synoptic diagram.
Fig. 5 and Fig. 6 are respectively the left and right part enlarged drawing of A-A direction among Fig. 2.
With reference to Fig. 1, the utility model design frame chart ingredient comprises a current transformer as can be known, it imports termination testing power supply and its output tested transformer input/output terminal of termination and current channel A/D converter input end, a voltage transformer (VT), it imports termination testing power supply and its output termination voltage channel A/D converter and frequency measurement circuit input end, a current channel A/D converter, its input end connects above-mentioned current transformer output terminal and its output terminal order sheet microsystem, a voltage channel A/D converter, its input end connects above-mentioned voltage transformer (VT) output terminal and output terminal connects above-mentioned microsystem, one frequency measurement circuit, its input end connects above-mentioned voltage transformer (VT) output terminal and output terminal connects above-mentioned microsystem, an above-mentioned single-chip microprocessor system, it connects electric current, the voltage channel A/D converter, control A/D conversion with is connected the said frequencies metering circuit and carries out frequency compensation and connect the accuracy of instrument calibration circuit carrying out measuring accuracy and calibrating, also two-way connection person-machine dialogue keyboard, its output terminal connects a display and a mini-printer, in addition, also comprise a localpower that connects each part mentioned above.
Above-mentioned electric current, voltage binary channels are for improving correctness, the sample rate of measuring active power under low-power, overcoming the time sharing sampling error and set.
The said frequencies metering circuit is for compensation changes because of the mains frequency shakiness causes electric current, voltage transformer (VT) coil induction reactance, causes electric current, voltage sample amplitude and phase change to be set.It can make the output frequency signal of voltage transformer (VT) be shaped to square-wave signal, sends into above-mentioned microsystem through frequency division, causes electric current, voltage sample amplitude and phase change to compensate above-mentioned situation.
Above-mentioned accuracy of instrument calibration circuit is to be used for making all parameter readings of this instrument and measurement standard general purpose instrument to demarcate 0.2 grade of level accuracy reading to be consistent.
With reference to Fig. 2, just know the course of work and the network component thereof of the utility model-embodiment.Testing power supply voltage is added to the cross-over connection of secondary coil two ends resistance R
5, R
6, R
7Voltage transformer (VT) (T
1, T
2, T
3) input end on, its electric current is added on the current transformer input end (expression among Fig. 2), induced signal separately is added to respectively by two 8 and selects 1 analog switching circuit piece, 4051 (U
20, U
7) input end of the multi-way switch formed, its output signal is added to two A/D converter AD5748 (U of electric current, voltage channel respectively
6) input pin 10Vspn, then, its digital output signal is added to the (U by CPU8031
1), latch 74LS373 (U
2) 16K erasable programmable storer (EPROM) 27128 (U
3), 8K random access memory (RAM) 6264 (U
4), two code translator 74LS138 (U
9, U
10) and the data bus D of the single-chip microprocessor system (dot-and-dash line qualifying part among Fig. 2) formed of 6MHZ clock
0～D
7, through its data processing and electrically erasable programmable ROM (EEPROM) 28178 (U
5) after the accuracy of instrument calibration circuit calibration, send into (U by latch 74LS373
18), ternary trigger (the serving as data bus driver) 74LS245 (U of eight homophases
8), 8 light emitting diode (LED:L
1-L
8), NAND gate circuit
74L02 (U
22), 8 latch 74LS373 (U
11-U
20), 8 charactrons, 8 sign-changing amplifiers
(U
17A-F, U
26A-B) display demonstration of forming and the latch 74LS373 (U that passes through to connect above-mentioned single-chip microprocessor system data bus
23), two monostable multi-resmator 74LS123 (U
24:A), resistance R
12With Sheffer stroke gate 74LS02 (U
22:C) send into printer prints and go out test result.
CPU8031 (U
1) be connected to by key S between Reset pin and the ground
1, capacitor C
5, C
3, resistance R
1, R
2The reset circuit that is connected into.
CPU8031 (U
1) P
1Mouth P
10～P
17Be connected to the keyboard circuit of forming by 16 on ﹠ off switch 1-16 on the pin.
The enlarged drawing of Fig. 2 is seen Fig. 5 and Fig. 6.
The parameter of main integrated circuit block (U) model and resistance (R), electric capacity (C) can be selected for use among Fig. 2:
U
1: 8031,80C31, P8031AH, U
2: 74LS373,74LS273, U
3: 27128,27C128,27256, U
4: 6264,6116, HY6264APL, U
5: 2817A, 2816, AT2817A, U
6: AD574A, AD574ADT, U
7: 4051, MC1405IBCP, U
8: 74LS245,74LS244, U
9: 74LS138, GD74CS138, U
17: 74CS04, GD74LS04, U
21: 74CS02, other integrated circuit block U:11-16,25,19,28,18,23 is a general part; R
1: 4～6K, R
2: 4～6K, R
3, R
4: 4～5K, R
5, R
6, R
7: 2～3K, R
8, R
9: 4～5K, R
10: 9～10K, R
11: 95～100K, R
12: 2～3K, R
13: 4～5.1K, R
14: 14～16K, R
15: 2～3K; Capacitor C
1, C
2, C
3: 8～12P, C
4, C
7: 900～1100P, C
6: 5000～7000P, C
5: 20～25F, C
8: 9000～11000P.
With reference to Fig. 3, complete machine structure ingredient of the present utility model as can be known comprises one by casing, be fixed on printed circuit board (PCB) that has the single-chip microprocessor system circuit (4) and mini-printer (3) on its base plate, be distributed in the main frame (1) that display window (6) and person-machine dialogue keyboard (7) on its panel are formed, with a current transformer (14) and cable (10 that both are connected as a single entity thereof, 11), the cable (5 that also comprises connecting circuit plate (4) and display window (6) and keyboard (7), 18), the cable (19) of connecting circuit plate (4) and printer (3), voltage transformer (VT) input terminal (8) and above-mentioned current transformer input terminal (9) on the casing left side, current output terminal (13) and voltage transformer (VT) voltage input end (12) on printout outlet (2) on the casing top and movable handle (17) current transformer (14) right plate that is contained on the casing biside plate, the high voltage link end (15) on panel top and low-voltage terminals (16).
Printed circuit board (PCB) among Fig. 3 (4) is the circuit board of Fig. 2 circuit.Frequency measurement circuit wherein is that the negative terminal by operational amplifier A LM393 connects capacitor C
6-end, diode D
1Anodal, diode D
4Negative pole and resistance R
11With R
10, its anode, capacitor C
6The other end, D
1Negative pole, D
4Anodal, capacitor C
4One end ground connection, capacitor C
4The other end is connected on resistance R
10With R
11Between, its output terminal connecting resistance R
14One end, another termination operational amplifier B LM393 (U
30) negative terminal; Operational amplifier B positive ending grounding, its output terminal connecting resistance R
13One end, and its another termination stabilivolt Z
1Negative pole, capacitor C
8, resistance R
15An end and two tetrad counter 74LS393 (U
27:A) MR end and stabilivolt Z
1Anodal, capacitor C
8With resistance R
15The other end and above-mentioned counter CLK end ground connection, its counter Q
0Termination CPU8031 (U
1) INT
1Pin and form (Fig. 2 upper left quarter).
Also have one on the circuit board (4) by an electrically erasable programmable ROM (EEPROM) 28178 (U
5) data bus and address bus be connected the data and address bus of above-mentioned single-chip microprocessor system respectively, it is write line W and passes through switch
Connect above-mentioned microsystem and write line WR, it is read line G and chip select line E and connects above-mentioned microsystem respectively and read line RD and incoming line Y
1The accuracy of instrument calibration circuit of forming (among Fig. 2).
The ingredient of display window among Fig. 3 (6) comprises parameter display window (the green pipe of the front two Presentation Function symbol that the out of order red led of expression self check, green indicating lamp working properly, 6 light emitting diodes (LED) charactron are formed, four the red pipe demonstration measured result data in back), two range display windows that the red LED charactron is formed, be used for the dimension V of unit, A, W, VA, KWh, %, COS , the H that the current gear number (1 is illustrated in the 0-5A range, and 2 are illustrated in 5～50A range), 8 light emitting diodes (LED) of display setting form
2Display window (Fig. 4).This shows that display items display is many.
Keyboard among Fig. 3 (7) is by 11 multiplexing key: O/U (numeral 0 or demonstration phase voltage function key), 1/I (numeral 1 or demonstration function of current key), 2/P (the meritorious power functions key of numeral 2 or demonstration), 3/S (numeral 3 or demonstration applied power function key), 4/F (numeral 4 or display frequency function key), 5/L (numeral 5 or demonstration power factor function key), 6/UK (numeral 6 or demonstration impedance voltage function key), 7/PK (numeral 7 or demonstration short circuit loss function key), 8/H (numeral 8 or display line voltage function key), 9/SHF (numeral 9 or shift), / F key (radix point or PT, CT coefficient settings key) and 5 singly-bounds: the DAT key (date, the time set key), ANL key (rated current enter key), SET key (tested transformer parameter setting key), BM key (measurement of average value setting key), PRT key (printing key) is formed (Fig. 4).This shows many, the intelligent degree height of the utility model person-machine dialogue project.
External power supply and accessory power outlet (not expressing among the figure) are arranged on Fig. 3 back.
Attention: the current transformer input-output line can not misconnection.If use pressure regulator, power supply inserts mutual inductor again through pressure regulation.
Claims (4)
1. transformer loss intelligent tester, it is characterized in that its ingredient comprise one by casing, be fixed on the printed circuit board (PCB) that has the single-chip microprocessor system circuit (4) and mini-printer (3) on its base plate, be distributed in main frame (1) that display window (6) and people's one machine dialogue keyboard (7) on its panel form and a current transformer (14) and cable (10,11) that both are connected as a single entity thereof.
2. tester according to claim 1, it is characterized in that also having on the circuit board (4) one and be connected the data and address bus of above-mentioned single-chip microprocessor system respectively by the data bus of an electrically erasable programmable ROM (EEPROM) 28178 (U5) and address bus, it is write line W and passes through switch
Connect above-mentioned microsystem and write line WR, it reads line G and chip select line E, connects the accuracy of instrument calibration circuit that above-mentioned microsystem is read line RD and incoming line Y1 composition respectively.
3. tester according to claim 1 is characterized in that the ingredient of display window (6) comprises the out of order red led of self check, green indicating lamp working properly, parameter display window, range display window and the dimension V of unit, A, W, VA, KWh, %, COS , H2 display window.
4. tester according to claim 1, it is characterized in that keyboard (7) by 11 multiplexing key: O/U, 1/I, 2/P, 3/S, 4/F, 5/L, 6/UK, 7/PK, 8/H, 9/SHF ,/F key and 5 singly-bound: DAT, ANL, SET, BM, PRT keys form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95224100 CN2262711Y (en) | 1995-10-24 | 1995-10-24 | Transformer loss intelligent tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95224100 CN2262711Y (en) | 1995-10-24 | 1995-10-24 | Transformer loss intelligent tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2262711Y true CN2262711Y (en) | 1997-09-17 |
Family
ID=33870983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95224100 Expired - Fee Related CN2262711Y (en) | 1995-10-24 | 1995-10-24 | Transformer loss intelligent tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2262711Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1320365C (en) * | 2005-02-23 | 2007-06-06 | 西安瑞驰冶金设备有限责任公司 | Method for metering transformer loss |
-
1995
- 1995-10-24 CN CN 95224100 patent/CN2262711Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1320365C (en) * | 2005-02-23 | 2007-06-06 | 西安瑞驰冶金设备有限责任公司 | Method for metering transformer loss |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |