CN2279615Y - Comprehensive testing instrument for on-load tap changer of power transformer - Google Patents
Comprehensive testing instrument for on-load tap changer of power transformer Download PDFInfo
- Publication number
- CN2279615Y CN2279615Y CN 96218971 CN96218971U CN2279615Y CN 2279615 Y CN2279615 Y CN 2279615Y CN 96218971 CN96218971 CN 96218971 CN 96218971 U CN96218971 U CN 96218971U CN 2279615 Y CN2279615 Y CN 2279615Y
- Authority
- CN
- China
- Prior art keywords
- instrument
- switch
- power supply
- transformer
- tested
- 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
Links
Images
Landscapes
- Measurement Of Resistance Or Impedance (AREA)
Abstract
The utility model relates to a comprehensive testing instrument for the on-load tap switch of the power transformer. The panel of a machine box is provided with a display device, a printer and various press keys. The interior of the machine box is provided with an analogue signal processing board, a microprocessor board, a system power supply, a measuring power supply and a protective board. The external interface of the machine box is plugged with an angle sensor. The utility model adopts the microcomputer to control, realizes the automatic measurement of the utility model on the parameters of transition time, transition wave shape, transition resistance, three phase synchroneity, separation angle, contact resistance, etc., through the specially designed measuring circuit. The utility model measures the transition wave shape, the transition time, the transition resistance and the three phase synchroneity of the on-load tap switch on line (the three phase sleeve tube of the transformer is directly connected with the wire to measure). The measurement data is automatically analyzed in the instrument or is sent to the microcomputer through an RS-232 interface, and is carried with comprehensive analysis.
Description
The utility model relates to the electric parameters testing instrument, particularly the comprehensive tester of on-load tap changers of transformers parameter.
Load ratio bridging switch is and the loop-coupled unique moving component of transformer high-voltage that its failure rate is higher.Statistics according to nineteen ninety, the fault frequency of load ratio bridging switch accounts for transformer fault total degree 23.2%, and along with the growth that increases and move the time of ULTC platform number, failure rate is in rising trend, and therefore the check test to load ratio bridging switch more and more draws attention.In power equipment preventive trial rules, require to check sequence of movement, the operating angle of load ratio bridging switch, measure switching time.But still incomparable both at home and abroad at present more perfect surveying instrument, past attempts adopts multimeter to measure and index dial is measured the angle of departure, measure waveform transit time with oscillograph, but measuring accuracy is poor, and method of testing falls behind, and is bothersome time-consuming, tests pretty troublesome.
The problem of aspects such as the purpose of this utility model is to provide a kind of power transformer load tap changer comprehensive tester, adopts the test of common detection means and oscillograph both to lack degree of accuracy at present so that solve, and is pretty troublesome again, and fill up the blank of this respect.
The purpose of this utility model is achieved through the following technical solutions:
A kind of power transformer load tap changer comprehensive tester, on its instrument case front panel action indicator is housed, auxilliary options button, main options button, function key, execute key, reset key, shifting bond(s), and the zero-bit adjusting knob is housed, the cabinet side is provided with external interface, printer (1) and display (2) also are housed on the front panel of instrument cabinet (22), in instrument cabinet (22) inside microporocessor board (20) is housed, analog signal processing plate 1 (18), analog signal processing plate 2 (19), and system power supply (15), measure power supply (14) and fender (13), wherein, have main metering circuit on the analog signal processing plate 1 (18), and be provided with one and be used for the CPU that takes measurement of an angle specially; On the external interface (12) of instrument cabinet (22), also be plugged with an angular transducer (23), RS-232 interface be housed at the opposite side of instrument cabinet (22).Measure power supply (14) and have three independently constant current source and three constant pressure sources independently, and a constant current source that is used for measuring contact resistance is arranged.Said three independently constant current source be 0.2A, 40V, said three independently constant pressure source be 10V, 5A, the said constant current source that is used for measuring contact resistance is 10A.Main metering circuit on the said analog signal processing plate 1 (18) comprises online metering circuit and non-on-line measurement circuit.Said on-line measurement circuit, with A is that example is X1, the X2 of instrument to be received the A phase of tested transformer (T) bushing mutually, instrumentally be connected with tested transformer neutral point (O), measure the 0.2A of power supply (14) output, the 40V power supply is received current-limiting resistance R13, and R13 is connected with JA1, receives the normally closed point of JA2, constant-current supply is received tested transformer (T) high pressure winding A end, receive on the tested load ratio bridging switch (K) through winding in the inside of tested transformer (T); Signal is through WV and R20 and be connected to the positive input terminal of the follower that amplifier IC3:A is connected into by R6; The output terminal of IC3:A and microporocessor board (20) join.Said non-on-line measurement circuit is the X1 with instrument, X2 receives the X1 of tested load ratio bridging switch (K), on the X2, instrumentally be connected with tested change device neutral point (O), connect the normal battle of relay J A2 and measure power supply) 10V of (14), the 5A constant pressure source, electric current in tested load ratio bridging switch (K) handoff procedure changes through sample resistance PR1, with the WI in parallel with PR1, R21 is connected on the R14, the other end of R14 is received the positive input terminal of amplifier IC1:A, and IC1:A is connected into the follower mode, and the output terminal of IC1:A and microporocessor board (20) join.
The utlity model has following outstanding advantage and effect:
This instrument development success, the present power transformer load tap changer measuring method of having deblocked falls behind, the problem that does not have the special measurement means, in the power equipment preventive trial, in time diagnose out the potential fault of load ratio bridging switch, significant to the reliability that improves Operation of Electric Systems.
1, composite measurement ability: in an instrument, realize measurement, transit time, transition waveform, transition resistance, three-phase synchronism, the angle of departure, contact resistance etc. to the various parameters of load ratio bridging switch.
2, measurement result analysis: the data that instrument switches switch transient process automatically deposit internal memory in.The user can reappear waveform as required on the giant-screen graphic lcd of instrument, analyze to switch in the transient process situation of change of the various parameters of each moment threephase switch.
3, have two and overlap independently metering circuit:, be the assurance measuring accuracy, and adopted the different measurement circuit of two covers because the band winding of load ratio bridging switch is measured and is not with the winding measurement to have very big difference.
4, external data communication: all test results by the RS-232 communication interface, can be sent into principal computer, utilize the software of software that we provide or independent development test data is analyzed or to be filed.
5, flying print output: be furnished with a miniature high-speed printer on the instrument, can print all test datas and curve in several seconds.
6, be provided with impact, overvoltage crowbar in the instrument: all outside leads are all sent into metering circuit through protection system, can prevent like this owing to big inductance spark or wiring error is damaged instrument.
7, compact conformation, be easy to carry: the volume of instrument has only: long 410mm, wide 280mm, high 460mm, heavy 11kg is fit to single carrying, in-site measurement.
The drawing of accompanying drawing is described as follows:
Fig. 1 is a structural drawing of the present utility model
Fig. 2 is a schematic block circuit diagram of the present utility model
Fig. 3 is tested on-off principle figure
Fig. 4 is main metering circuit figure
See also Fig. 1, instrument cabinet 22 front panels of the present utility model are provided with printer 1, display 2, function indication 3, a plurality of auxilliary options button 4, main separation select strong 10 and function key 5, and zero-bit adjusting knob 6, shifting bond(s) 7, execute key 8, reset key 9 and power switch 11 are arranged.Cabinet 22 sides are provided with external interface 12, and there is fender 13 inside, measures power supply 14, system power supply 15, fan 16, RS-232 interface 17, and simulating signal plate 18,19 microporocessor boards 20 and machine cage 21 are arranged.The above-mentioned annexation that is equipped with parts is seen the block diagram of Fig. 2.Below in conjunction with measuring principle design feature and metering circuit and technical data are described further:
Measuring principle:
This instrument is mainly used in measures the every electric property parameter of power transformer load tap changer.Because this breaker acting speed is fast, switch current is big, operating voltage is high.All have higher requirements to switching transition resistance, contact resistance, transit time, transition waveform and three-phase synchronism.Whole switch generally is contained in the oil-overflow closed shell.Give directly to measure and bring difficulty.Schematic diagram by slowdown monitoring switch is seen Fig. 3.T is the transformer body among the figure, and K is a load ratio bridging switch.Be to measure above-mentioned parameter, need be on load ratio bridging switch the plus signal source.Because Transformer Winding is a very large inductance (a hundreds of henry), and direct current resistance is arranged, therefore, band winding (being connected) with the transformer body be not with winding (break away from transformer body only slowdown monitoring switch) measurement, the requirement of signal source and measuring method is had very big difference.We have adopted two to overlap independently measuring-signal source and testing circuit to this.When the band winding was measured, by three that measure that power supply 14 provides constant current source 0.2A independently, 40V received respectively on transformer high-voltage leading-out terminal A, B, the C.Neutral point O is connected with simulation ground.Three independently testing circuit insert the transformer high-voltage leading-out terminal respectively.After treating system stability, during switch motion, record the shunting switch action parameter by collection transformer high-voltage leading-out terminal A, 3 potential change in time of B, C.
When not being with winding to measure, owing to do not have the influence of big inductance and winding D.C. resistance, for guaranteeing higher measuring accuracy and real transition waveform, we adopt big electric current, voltage source (10V, 5A), by detecting the variation of loop current, obtain the various parameters of switch.By three that measure that power supply 14 provides independently voltage source have access on 6 extension lines of on-load shunting switch respectively through current-limiting resistance: (X1, X2), (Y1, Y2), (Z1, Z2).During the switch change action, the electric current by gathering three independent loops and records the action parameter of shunting switch over time.
The measurement of the angle of departure be with signal source add respectively load ratio bridging switch extension line (X1, X2), (Y1, Y2), (Z1, Z2) end on.On the load ratio bridging switch final drive shaft, place angular transducer 23, and record during switch motion (X1, X2), (Y1, Y2), (Z1, Z2) each point potential change angle value constantly, and the selector switch that obtains load ratio bridging switch A, B, C three-phase disconnects, closed, angle value that change-over switch is switched.
The load tap changer contact measuring contact resistance is by (X1, X2), (Y1, Y2), (Z1 adds the 10A constant current source Z2) and between the O, and detects the current potential at these two ends, calculates contact resistance by little processing at the dynamic and static contact of switch two ends.
In the instrument of our development, above-mentioned various measurement functions and data processing, calculating, storage, demonstration, printing, parameter correction are all finished by the microprocessor system in the instrument.The principle of instrument block diagram is seen Fig. 1.
Design feature:
Whole instrument is made up of a series of unit module, and is interconnected with unified extendible bus between each circuit board.Microporocessor board, analog signal processing plate and expansion board are contained in the machine cage of a shielding.Fig. 1,2 is respectively the structured flowchart and the theory diagram of instrument.For improving shock resistance, instrument adopts double-deck casing structure.Outer cabinet does not draw in the structured flowchart.Each unit module, be fixed on the cabinet.Outer cabinet is the aluminium alloy box of a suitable field work.Isolate with the thick soft packing of 8mm between the inside and outside cabinet, and fixing.Make it have good seismic resistance.Each unit module function of instrument is as follows:
1, printer: this is a TP μ P-AF-40 type high speed panel type printer, connects with microporocessor board 20 by parallel port, is used to export measurement result or prints curve, figure.
2, display: 240 * 128 giant-screen graphic lcds, controller is T6963C, connects with microporocessor board 20 by special-purpose parallel port, is used for function menu, measurement result, parameter setting, indicating fault, squiggle of display instrument etc.And realization man-machine interaction.
3, action indication:, divide three windings on analog signal processing plate 1 by 6 LED light.Be used in reference to the on-load shunting switch selector switch action situation that is shown with.
4, auxilliary options button: totally 4 keys, instrument shows corresponding operating function according to different measurement purposes below showing, the user presses options button as required, operates accordingly.
5, function key: below auxilliary options button 4 function keys being arranged, is respectively menu, recovery, selection, affirmation.When instrument carried out the measurement of certain special parameter, the user can eject actions menu at any time, and test result is handled or analyzed.
6, zero-bit adjusting knob: during loaded switch on-line measurement (the band winding is measured), owing to the existence that is connect transformer winding inductance and direct current resistance by slowdown monitoring switch, can influence the accuracy of measurement, during measurement, by regulating this button, making measured initial value is zero behind the system stability.
7, shifting bond(s): be made up of 4 keys, the graticule when being used for parameter setting, modification, wave form analysis moves with figure and moves.
8, execute key: be used to start instrument, begin to measure, when parameters such as measurement transition waveform, the angle of departure, by this key, instrument enters the measurement state.
9, reset key: instrument resets to original state.
10, main options button: 4 keys, the corresponding main measurement function of each key after the instrument start, is pressed corresponding key and is selected.As: the band winding is measured, and is not with winding to measure, and measures contact resistance etc.
11, power switch: the main power switch of instrument, the control of 220V ganged switch.
12, external interface: all measurements and power supply all pass through this mouthful and introduce instrument internal, and it is made up of a plurality of private jacks and binding post.
13, fender: enter instrument for preventing external high pressure, particularly when the band winding is measured,, be easy to produce high pressure, make instrument damage because Transformer Winding is a very big inductance.We adopt special holding circuit for this reason, make instrument can tolerate the high pressure of several ten thousand volts, and do not damage.All outside inlet wires are all sent into instrument internal by fender.
14, measure power supply: this is the linear power supply of a multichannel output, and we have mentioned to realizing that the band winding is measured and must use current source in measuring principle, and when not being with winding to measure for improving measuring accuracy, must the working voltage source.Be to reduce the cross interference between the three-phase, we adopted three independently current source (0.2A, 40V) and three independently voltage source (10V, 5A).Another road is (10A, 6V) constant current source that is used for measuring contact resistance.Adopt multichannel independently to measure the single-phase measurement that power supply not only can be realized the load ratio bridging switch parameter, and measuring accuracy is improved greatly, this is one of principal feature of this instrument.
15, system power supply: for the various electronic circuits in the instrument and printing, display device provide power supply.This is a small-power switching power-supply, have+5V ,+12V ,-12V output.
16, fan: instrument heat transmission, 12V DC fan.
17, RS-232 interface: data communication and instrument control interface, this is the 9 pin gang sockets of a D type.Be connected with computing machine or test macro by this mouthful, can realize data communication or synchro measure.Test result data is sent into computing machine analysis, filed.
18, the analog signal processing plate 1: this plate is under the control of microporocessor board 20, and the measurement purpose according to different applies signal source to tested switch, sends detection signal back to microporocessor board 20 after treatment simultaneously.This plate is the critical component of our this instrument, and side circuit partly describes in detail in metering circuit.Measure in the time of for realization angle and transition waveform, plate is provided with the CPU (89C2051) that a special use takes measurement of an angle.Other electron component comprises LM324,74LS04, MC1416,74HC4060,74LS123,74LS14,74LS00, TLP521-4, relay, resistance, electric capacity, voltage stabilizer, adjustable resistance etc.
19, the analog signal processing plate 2: this plate is mainly used in measures the load tap changer contact contact resistance.Under the control of microporocessor board 20, apply 10A constant current signal source to tested switch.Testing result after high-precision A/D conversion, is carried out error correction by this plate CPU through amplifying, and sends test result back to microporocessor board 20.The critical piece of this plate is 7650,18 A/D-MAX132 of amplifier and CPU-89C51 etc.
20, microporocessor board: this is the function control and the administrative center of this instrument, and it is responsible for accepting user's operation, sends instruction to each feature board, receives the test result of each feature board.To test data analyze, show, printing, storage or transmission etc.。This plate is mainly by 8098CPU, 27256ROM, and chips such as 62256RAM, DS12887 clock, 8255 interfaces are formed.
21, machine cage: flexible, easy to maintenance for instrument is expanded, adopt bus to connect between the instrumental function plate, with industrial standard 96 needle sockets bus board is connected with each feature board, bus board is in the bottom of machine cage.Use machine cage is enclosed in inside with each feature board, has improved antijamming capability and physical strength.
22, instrument cabinet: the internal layer cabinet of instrument.It adopts frame structure of aluminum alloy.Each unit module all is fixed on the bottom liner plate of cabinet, surface plastic spraying is handled.
23, angular transducer: angular transducer is a special-purpose member of being made up of rotary pulsed scrambler and physical construction.Be connected on during measurement on the special external interface of instrument, and with sensor card on by the final drive shaft of slowdown monitoring switch.
Except that printer and giant-screen graphic lcd, all buttons all adopt and touch key on instrument panel, and these keys are divided into two classes, and a class is a definition key, is marked with literal or symbol at key.Another kind of is no definition key, and the meaning of these keys is presented on the liquid crystal display.According to different functions, different implications is arranged, significantly reduced the quantity of button on the panel.Vivid winding figure is adopted in the indication of selector switch motion action, and the user is come into plain view.Lcd contrast does not generally need to adjust, and amplifies instrument internal, by screwdriver, regulates in the aperture of panel.Power switch is placed on the upper right corner, and pilot lamp is arranged.
All extension lines of instrument are placed on the right side, and data-interface is placed on the left side, during the field condition operation, can directly use.Operate very simple.
Three, metering circuit
Partly narrated the important difference of load ratio bridging switch on-line measurement and non-on-line measurement in measuring principle, realized this two kinds of measuring methods simultaneously in our instrument, the key here is an analog signal processing plate 1.Fig. 4 is A facies principle figure wherein, and B, C are identical therewith mutually.During on-line measurement (the band winding is measured), with the X1 of instrument, X2 receives the A phase of transformer high-voltage sleeve pipe.Instrumentally be connected with transformer neutral point O.During measurement, relay J A1 closure, (02A 40V) receives tested transformer high-voltage winding A end through the normally closed point of current-limiting resistance R13 → JA1 → JA2 to the constant current source IA+ that measurement power supply 14 provides, and is added on the tested load ratio bridging switch through winding in tested transformer inside.The signal that takes out is sent into the positive input terminal of the follower that is connected into by amplifier IC3:A by R6 after WV and R20 dividing potential drop.After treating that tested Transformer Winding inductance transient process is finished, making the output AV of follower IC3:A by regulator potentiometer WB is zero.During the loaded switch change action, the output of AV has reflected the course of action of switch.Microporocessor board 20 becomes digital signal record to get off this conversion of signals with 8,000 times/second speed.For dividing folding, calculating and use.The characteristics of this circuit are to adopt constant current source power supply, and adopt attenuator circuit to obtain voltage signal, and obtain measuring-signal AV after follower is isolated.(not being with coiling to measure) during non-on-line measurement, with the X1 of instrument, X2 receives by the X1 of slowdown monitoring switch, on the X2.Instrumentally be connected with transformer neutral point O.During measurement, relay J A2 closure, (10V, 5A), VA is added to by the X1 of slowdown monitoring switch, on the X2 through relay the constant pressure source that the measurement power supply provides.VA+ is through current-limiting resistance PR2, sample resistance PR1, instrumentally receives by on the neutral point O of slowdown monitoring switch.By the variation of electric current in the slowdown monitoring switch handoff procedure after sample resistance PR1 takes out by WI, R21 dividing potential drop, send into the anode input end of follower IC1:A by R14.Output signal AI has reflected the contact situation of contact in the switch motion process.Microporocessor board 14 becomes digital signal record to get off this conversion of signals with 8,000 times/second speed.Use for analyzing, calculating.The particularly employing constant pressure source power supply of this circuit, and obtain current signal through current sampling resistor, through decay, obtain measuring-signal AI after the isolation.A negative input end that has back the comparer IC2:A that stagnates is sent on another road of AI.Be used to measure the change-over switch operating angle.
The selector switch actuating signal of tested load ratio bridging switch is by X1, and X2 takes out after JA1, the normally closed contact DZ1 of JA2, and DZ2, R4, R5 send into optocoupler T1:A, T1:B, output signal X11, X12 are used to measure the selector switch operating angle.
Analog signal processing plate 1 is the critical component of this instrument.It has adopted two kinds of different measuring methods (voltage measurement and current measurement method), and realize to load ratio bridging switch, band winding and not with the measurement of winding is to improve measuring accuracy, and has adopted strong signal source, the method for the detecting signal of decaying.Method antijamming capability than employing weak signal source, amplification output signal is strong, distortion is little.
Four, technical data:
1, model: 3168C
2, the band winding is measured:
Signal source: three tunnel independence constant current sources, every road 0.2A/40V 1%
Sampling mode: voltage sampling
Transition resistance measurement range: 0-50 Ω measuring error: ± 1% sample frequency: 8KHZ record transition waveform time: 0-120ms measures synchronism error: 0.1ms3, be not with winding to measure: signal source: three tunnel independence constant pressure sources, every road 10V/5A 1% sampling mode current sampling transition resistance measurement range: 0-1k Ω measuring error: ± 1% sample frequency: 8KHZ record transition waveform time: 0-120ms measures the synchronism error: 0.1ms angle of departure measuring error: ± 14, contact resistance is measured: signal source: 10A constant current source measuring contact resistance scope: 0-1 Ω measures resolution: 1 μ Ω power supply: alternating current 220V 50HZ power consumption:＜500W5, external interface standard: communication: RS-232C 2400, n, 8,1 parallel interface: 8 standard printer parallel interfaces 6, physical dimension: long: 410mm, wide: 260mm, height: 460mm.7, weight :≤11kg8, working environment: operating temperature: 0-40 ℃ relative humidity:＜85%
Claims (6)
1, a kind of power transformer load tap changer comprehensive tester, on its instrument case front panel action indicator is housed, auxilliary options button, main options button, function key, execute key, reset key, shifting bond(s), and the zero-bit adjusting knob is housed, the cabinet side is provided with external interface, it is characterized in that: printer (1) and display (2) also are housed on the front panel of instrument cabinet (22), in instrument cabinet (22) inside microporocessor board (20) is housed, analog signal processing plate 1 (18), analog signal processing plate 2 (19), and system power supply (15), measure power supply (14) and fender (13), wherein, have main metering circuit on the analog signal processing plate 1 (18), and be provided with one and be used for the CPU that takes measurement of an angle specially; On the external interface (12) of instrument cabinet (22), also be plugged with an angular transducer (23), RS-232 interface be housed at the opposite side of instrument cabinet (22).
2, power transformer load tap changer comprehensive tester according to claim 1 is characterized in that: measure power supply (14) and have three independently constant current source and three constant pressure sources independently, and a constant current source that is used for measuring contact resistance is arranged.
3, power transformer load tap changer comprehensive tester according to claim 1 and 2, it is characterized in that: said three independently constant current source be 0.2A, 40V, said three independently constant pressure source be 10V, 5A, the said constant current source that is used for measuring contact resistance is 10A.
4, power transformer according to claim 1 has to carry and connects the switch comprehensive tester, and it is characterized in that: the main metering circuit on the said analog signal processing plate 1 (18) comprises online metering circuit and non-on-line measurement circuit.
5, have to carry according to claim 1 or 4 described power transformers and connect the switch comprehensive tester, it is characterized in that: said on-line measurement circuit, with A is that example is the X1 with instrument mutually, X2 receives the A phase of tested transformer (T) bushing, instrumentally be connected with tested transformer neutral point (O), measure the 0.2A of power supply (14) output, the 40V power supply is received current-limiting resistance R13, R13 is connected with JA1, receive the normally closed point of JA2, constant-current supply is received tested transformer (T) high pressure winding A end, receive on the tested load ratio bridging switch (K) through winding in the inside of tested transformer (T); Signal is through WV and R20 and be connected to the positive input terminal of the follower that amplifier IC3:A is connected into by R6; The output terminal of IC3:A and microporocessor board (20) join.
6, have to carry according to claim 1 or 4 described power transformers and connect the switch comprehensive tester, it is characterized in that: said non-on-line measurement circuit is the X1 with instrument, X2 receives the X1 of tested load ratio bridging switch (K), on the X2, instrumentally be connected with tested change device neutral point (O), meet the 10V that measures power supply (14) the normal battle of relay J A2, the 5A constant pressure source, electric current in tested load ratio bridging switch (K) handoff procedure changes through sample resistance PR1, with the WI in parallel with PR1, R21 is connected on the R14, and the other end of R14 is received the positive input terminal of amplifier IC1:A, IC1:A is connected into the follower mode, and the output terminal of IC1:A and microporocessor board (20) join.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96218971 CN2279615Y (en) | 1996-09-13 | 1996-09-13 | Comprehensive testing instrument for on-load tap changer of power transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96218971 CN2279615Y (en) | 1996-09-13 | 1996-09-13 | Comprehensive testing instrument for on-load tap changer of power transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2279615Y true CN2279615Y (en) | 1998-04-22 |
Family
ID=33899686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96218971 Expired - Fee Related CN2279615Y (en) | 1996-09-13 | 1996-09-13 | Comprehensive testing instrument for on-load tap changer of power transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2279615Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101458308B (en) * | 2009-01-14 | 2011-05-11 | 吉林省电力有限公司电力科学研究院 | AC test device for transformer on-load tap-changer operating characteristic |
| CN103954908A (en) * | 2014-04-16 | 2014-07-30 | 国家电网公司 | Fault simulation device for transformer on-load tapping switch |
| CN105334456A (en) * | 2015-11-06 | 2016-02-17 | 国家电网公司 | Dual voltage-regulating winding power transformer on-load tap-changer tester and fault detection method |
| CN105759200A (en) * | 2016-02-18 | 2016-07-13 | 中国农业大学 | Method for online monitoring of work state of on-load tap-changer and early warning |
| CN109633425A (en) * | 2018-11-27 | 2019-04-16 | 国网江苏省电力有限公司检修分公司 | A kind of dry-type transformer vacuum on-load operation switch acting characteristic simulator |
| CN110609228A (en) * | 2019-09-17 | 2019-12-24 | 国网河北省电力有限公司 | Fault detection and calibration device for on-load tap changer of power transformer |
| CN114137404A (en) * | 2021-11-23 | 2022-03-04 | 深圳供电局有限公司 | Maintenance method and system for voltage regulating switch of power transformer |
-
1996
- 1996-09-13 CN CN 96218971 patent/CN2279615Y/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101458308B (en) * | 2009-01-14 | 2011-05-11 | 吉林省电力有限公司电力科学研究院 | AC test device for transformer on-load tap-changer operating characteristic |
| CN103954908A (en) * | 2014-04-16 | 2014-07-30 | 国家电网公司 | Fault simulation device for transformer on-load tapping switch |
| CN105334456A (en) * | 2015-11-06 | 2016-02-17 | 国家电网公司 | Dual voltage-regulating winding power transformer on-load tap-changer tester and fault detection method |
| CN105334456B (en) * | 2015-11-06 | 2018-11-23 | 国家电网公司 | Double tap-changing windings power transformer load tap changer testers and fault detection method |
| CN105759200A (en) * | 2016-02-18 | 2016-07-13 | 中国农业大学 | Method for online monitoring of work state of on-load tap-changer and early warning |
| CN105759200B (en) * | 2016-02-18 | 2019-03-15 | 中国农业大学 | A kind of load ratio bridging switch working condition on-line monitoring and method for early warning |
| CN109633425A (en) * | 2018-11-27 | 2019-04-16 | 国网江苏省电力有限公司检修分公司 | A kind of dry-type transformer vacuum on-load operation switch acting characteristic simulator |
| CN109633425B (en) * | 2018-11-27 | 2020-12-01 | 国网江苏省电力有限公司检修分公司 | Action characteristic simulation device for vacuum on-load tap-changer of dry-type transformer |
| CN110609228A (en) * | 2019-09-17 | 2019-12-24 | 国网河北省电力有限公司 | Fault detection and calibration device for on-load tap changer of power transformer |
| CN114137404A (en) * | 2021-11-23 | 2022-03-04 | 深圳供电局有限公司 | Maintenance method and system for voltage regulating switch of power transformer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101261192A (en) | 24KV high-voltage vacuum breaker mechanical features on-line monitoring method and monitoring device | |
| CN203217023U (en) | Motor and transformer microcomputer integration test stand | |
| CN108008294A (en) | A kind of experimental provision and experimental method of Intelligent isolation switch and breaker | |
| CN2279615Y (en) | Comprehensive testing instrument for on-load tap changer of power transformer | |
| CN112444746A (en) | Motor integrated test system | |
| CN212060527U (en) | Resistance-capacitance load box | |
| CN203337792U (en) | Motor type test system | |
| CN206848392U (en) | The test system of nuclear power station reactor core neutron measurement system electromechanical equipment | |
| CN203799003U (en) | Integrated online verification calibrator for voltage-withstand tester | |
| CN206161804U (en) | Accuse circuit breaker dropout testing arrangement is taken to intelligence | |
| CN203069664U (en) | Three-phase capacitance divider measuring device | |
| CN107632259A (en) | A kind of testing station for realizing multimode multi-parameters test generating set | |
| CN205067670U (en) | A anti -interference medium simulator for high -voltage electrical is experimental | |
| CN107422201A (en) | A kind of Multifunctional coil kind equipment testing synthesis parameter device | |
| CN107024631A (en) | With the volt-ampere characteristic test method of Multifunctional coil kind equipment testing synthesis parameter device | |
| CN207675855U (en) | A kind of test system of frequency converter | |
| CN206638714U (en) | Situ metrology check device | |
| CN2593204Y (en) | Multifunctional comprehensive power virtual measuring analyser | |
| CN1016820B (en) | Portable micro-computer controlled multifuncitonal tester of protective relay | |
| CN206161806U (en) | Take high, low temperature dropout intelligent test equipment of accuse circuit breaker | |
| CN2280919Y (en) | Integrated mutual-inductor calibration device | |
| CN206573659U (en) | A kind of switch cubicle energizing test platform system | |
| CN106771790A (en) | A kind of switch cubicle energizing test platform | |
| CN2212208Y (en) | Computer controlled relay protective detector | |
| CN203881861U (en) | Multifunctional power grounding parameter tester |
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 |