CN2181010Y - Pulse digital meter formeasuring action voltage time of high-voltage switch relay - Google Patents
Pulse digital meter formeasuring action voltage time of high-voltage switch relay Download PDFInfo
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- CN2181010Y CN2181010Y CN 93227524 CN93227524U CN2181010Y CN 2181010 Y CN2181010 Y CN 2181010Y CN 93227524 CN93227524 CN 93227524 CN 93227524 U CN93227524 U CN 93227524U CN 2181010 Y CN2181010 Y CN 2181010Y
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Abstract
The utility model relates to a pulse digital meter for measuring action voltage time of a high-voltage switch relay. The output ends of two regulating tubes for measuring the action voltage of a high voltage switch and a relay are connected with voltage-stabilizing tubes which are connected in series. Three contact points of the test button of a return voltage are respectively connected with a switch tube and a charging loop. The output end of the emitter of an amplifying circuit is respectively connected with the break of the high-voltage switch. The contact points of a breaker select separately or integrally stable direct current electrical level which is emitted by an integrated circuit or a triggering circuit of the loop to add to the break or the integrated circuit of the test circuit used for separating or combining action time. Synchronous test for the high-voltage switch, the action voltage and the time of the relay can be completed. The utility model has the advantages of accurate test data, high efficiency, strong anti-interference capability, etc.
Description
The utility model relates to a kind of electronics auto testing instrument, and particularly a kind of pulsed is surveyed the instrument of high-voltage switch gear, actuating of relay voltage, time, same period numeral.
In the electric system at present, there is following problem in testing tools such as testing high voltage switch, actuating of relay voltage, time, the same period:
1. Test Switchboard, actuating of relay voltage, the return voltage instrument is swept resistance, controllable silicon etc.The problem that exists is that to be added in high-voltage switch gear, relay coil time longer, often be with its coil adjustment test DC voltage, regulating the speed the soonest of having also has tens of seconds, its coil is in this section adjustment time, coil heating, its direct current resistance is altered a great deal, because electromagnetic force is directly proportional with the big small square of direct current resistance (coil) value, make electromagnetic force change nonlinearities change, make it test action voltage and cold down actual act magnitude of voltage error is very big, that have even overshoot scope has influenced safe operation of power system to a certain extent, and this is unallowed.
2. surveying high-voltage switch gear, relay actuation time, same period instrument is electrical secondmeter, oscillograph.The problem that exists:, be not to be exclusively used in slowdown monitoring switch, relay instrument owing to electrical secondmeter, oscillograph.The on-the-spot interim tie lines complexity of its oscillograph, debug difficulties, even need several hrs, read untrue is so that the scene uses is very inconvenient; Self missing by a mile of its electrical secondmeter is difficult to satisfy modern high-voltage switch gear, relay actuation time, the time test accuracy requirement same period.Again because high-voltage switch gear, relay have plenty of multi-break, contact, and high-voltage switch gear, relay need move repeatedly, can all survey its fracture, contact same period, actuation time, and miss by a mile.Also damaged simultaneously high-voltage switch gear, relay serviceable life to a certain extent.
3. owing to slowdown monitoring switch, operation voltage (or return voltage) time of relay, the same period are not same instruments, each tests data, and not anti-again highfield jamming countermeasure makes each technical data of test dispersed big.
The utility model purpose provides a kind of survey high-voltage switch gear, relay actuation time, two fractures or contact same period, whole fractures or contact is once finished the same period, once numeral shows, and can show each fracture or the survey high-voltage switch gear of contact deciliter time simultaneously, actuating of relay voltage, time, the same period digital instrument.
The utility model is by ectosome; function button; display pannel; the contact jack; current rectifying and wave filtering circuit; the voltage extracting circuit; current foldback circuit; pulse control circuit; pulse-generating circuit; the voltage table sampling keeps the loop; electric voltage frequency conversion loop; the frequency pulse waveform; the amplitude transformation circuit; amplify trigger circuit; the Time Triggered exclusive circuit; the master control door; counter; display circuit; oscillograph inserts the loop; the switch relay coil inserts the loop; the total triggering and zero clearing loop composition; bridge rectifier filter circuit inserts mu balanced circuit behind dividing potential drop and variable resistor, the output of mu balanced circuit inserts the transistorized T that low pressure extracts adjustment circuit low pressure extraction loop through dividing potential drop and variable resistor respectively
3, T
4Base stage is connected to temperature compensated diode respectively, the output access transistor T of overcurrent protection bistable circuit
7, T
7Output inserts instrument action (returning) potential pulse, oscillograph (microcomputer) interface circuit, the output terminal that the voltage in positive 12 volts of stabilized voltage supply loops is adjusted operational amplifier automatically inserts mu balanced circuit, monostable DC pulse, the output terminal that time is adjusted the loop inserts output triode through stabilivolt, the output terminal of output triode inserts switching tube, the output of switching tube is connected with switch series connection stabilivolt, it is tandem type voltage stabilizing pattern that DC voltage is adjusted the loop, sample circuit inserts amplifier tube, the emitter-base bandgap grading of amplifier tube is connected to comparator circuit, the output terminal of amplifier tube links to each other with voltage-reg-ulator tube, survey high-voltage switch gear, actuating of relay voltage or return voltage are adjusted the loop, voltage potentiometer links to each other with shunt voltage adjustment (fine tuning) pipe on the instrument panel, adjust the emitter and collector that pipe and output insert the series connection stabilivolt respectively, three contacts of return voltage testing button insert the collector and the charging capacitor loop of switching tube respectively, the electrical verification hydraulic circuit of being made up of resistance and light emitting diode inserts the parallel voltage-stabilizing loop after inserting the switch serial regulating circuit respectively and inserting the loop through voltage table, the pulse signal loop is inserted the counting type and is triggered the stable state loop, oscillograph (microcomputer), high-voltage switch gear, the relay coil interface loop is made up of jack and current-limiting resistance respectively, power taking pressure ratio example loop, voltage table inserts the positive input terminal of the operational amplifier of potentiometer access transconductance type computing amplification sampling hold circuit in the loop, the grid of output terminal and field effect transistor joins, drain electrode and source electrode insert 7 pin and 4 pin of operational amplifier respectively, the grid of field effect transistor also is connected to phase compensating circuit, also be connected to decoupling capacitor between the power supply of field effect transistor source electrode and drain electrode, pass through resistance on operational amplifier 5 pin, through oscillograph or microcomputer and relay, switch auxiliary contact and K
2Ground connection, the output terminal of the integrating amplifier of being made up of operational amplifier in the voltage transitions frequency loop inserts the trigger end (2 pin) of the monostalbe trigger of being made up of timer, the output terminal of timer links to each other with the switching tube input end, output end of switching tube inserts the negative input end of operational amplifier and inserts the output terminal of operational amplifier through the backfeed loop of being made up of electric capacity and diode after the diode group, voltage becomes the frequency pulse waveform and adjusts that the output terminal of timer inserts emitter follower through coupling capacitance and limiter diode in the loop, the emitter follower output terminal inserts operational amplifier, the input end of the output terminal of operational amplifier Access Control door behind limiter diode, the control of master control door time, supply voltage in the crystal oscillation loop is through K
4, K
5And R
ABe added in integrated circuit 15 pin and trigger circuit, the output terminal in crystal oscillation loop inserts 16 pin of integrated circuit, 8 pin of integrated circuit insert the transistor base of master control door, 11,12,17,1 terminal of integrated circuit inserts integrated block count display circuit, and high-voltage switch gear fracture or relay tip are linked into by G
20-G
25In the jack of forming, oscillograph or microcomputer are linked into by G
26-G
31In the jack of forming, jack G
20-G
25Insert amplifying circuit, jack G by repeating resistance respectively
26-G
31Insert reduction voltage circuit and mu balanced circuit respectively, the output of the emitter-base bandgap grading of amplifying circuit inserts respectively and surveys the high-voltage switch gear fracture, the circuit breaker contact divides or close the integrated circuit that stable DC level that the integrated circuit trigger circuit of selecting the loop send adds to fracture or contact test circuit deciliter actuation time, the fracture or the contact point signal that are come by the integrated circuit of selecting the loop insert integrated circuit, and the corresponding master control gate output terminal of integrated circuit adds the input end of step-by-step counting.In high-voltage switch gear fracture or the relay tip test loop same period, by the signal A that selects the loop integrated circuit
1, A
2Be added on integrated circuit and the integrated circuit integrated circuit B
5, A
5, C
5Insert integrated circuit, the corresponding master control door of integrated circuit inserts pulse-scaling circuit, in six high-voltage switch gears, relay fracture or the contacts test circuit deciliter same period, by A
3, B
3, C
3The fracture or the contact signal same period of reaction are added in the integrated circuit respective doors, be added in the integrated circuit respective doors and export high level through the inverter loop output low level, above-mentioned low level and high level signal add to the integrated circuit respective doors, foregoing circuit is installed in the tool housing, and the tool housing face is respectively arranged with the digital demonstration of high-voltage switch gear fracture or action of relay contact time and the same period, high-voltage switch gear or relay coil interface jack, oscillograph vibrator or microcomputer interface, the various function keys of instrument, various shift key, various adjustment button.
The utlity model has following advantage:
1. with rectangle DC voltage pulse square wave method testing high voltage switch, actuating of relay voltage and its return voltage of fast automatic survey, rectangle DC voltage pulse width (time) is adjustable 10-500 millisecond thus, promptly satisfied high-voltage switch gear, requirement relay actuation time, can not at this utmost point in the short time its coil problems of excessive heat taken place again.It adds rectangle DC voltage pulse square wave amplitude (magnitude of voltage) and is provided with in the instrument card and adjusts its amplitude and have voltage scale value knob, arbitrarily adjusts according to the test needs.Because this instrument has special DC voltage pulse square wave voltage regulation way, be that 40 Europe are worth when above in load again, its output square-wave voltage does not change with load.This instrument is surveyed high-voltage switch gear, actuating of relay voltage employing DC voltage pulse square wave method is that all are used for testing high voltage switch, the basic place of actuating of relay magnitude of voltage instrument both at home and abroad in difference.
2. survey high-voltage switch gear, relay actuation time, two fractures or contact same period, all fracture or contact are once finished the same period, and once numeral shows, and can show each fracture or contact (amounting to six) deciliter time simultaneously, maintenance, commissioning staff directly adjust underproof fracture or contact according to video data.Because it is 10KHz and 100KHz that actuation time, the same period are adopted pulse (time) source, the full test error is this pulse one-period, so actuation time, maximum error was 10 microseconds or 50us microsecond; The same period, maximum error was 10 microseconds.
3. this instrument is provided with oscillograph, microcomputer interface loop, directly joins, links with oscillograph, microcomputer, at the scene need not current wiring and debugging (because of having the outfit device of adjusting in the instrument), improved work efficiency.
4. this instrument adopts anti-highfield to disturb the loop measure, and the integrated circuit that has adopted 5G600 series, makes antijamming capability more than 150dB.
Accompanying drawing 1-9 is the utility model circuit structure schematic diagram.
Accompanying drawing 10 is structure external form figure of the present utility model.
Below in conjunction with accompanying drawing circuit structure of the present utility model and principle of work are further described.
Each loop structure of the utility model and principle are as follows:
One, slowdown monitoring switch action and return voltage principle and adjustment method.
1. rectification, filter circuit principle: as shown in Figure 1, when instrument uses AC power, with ac power plug patchhole G
2Exchange by rectifier bridge 1(D
1-D
4) become pulsating dc voltage, through capacitor C
1Reduce percent ripple.Change variable resistor 2(R
2) resistance value size control voltage stabilizing triode 3(T
2) base current, the output collector voltage is changed, also just make triode T
1Base voltage changes, and adjusts collector voltage drop and gets 220 volts of required direct voltage sources.Because at triode T
2Base stage adds a filter capacitor C
2Strengthened filter effect relatively, made it the pulsation of direct current output wave and meet the demands; When using 220 volts of power supplys of DC voltage, plug insertion G
2Direct current is pressed into terminals 7, No. 6.
2. get+40 volts ,+20 volts of adjustment loops
This loop is mainly instrument and provides ± 12 volts of stabilized voltage supply input voltages.Adjust low pressure and extract the triode T that adjusts circuit 4
3, T
4, by resistance R
6And R
7, R
10And R
11The reference voltage that provides makes triode T
4And T
5Emitter voltage is respectively+40 volts ,+20 volts.Diode 5,6(D
11, D
16) be temperature compensated diode, improve temperature performance.
3. the overcurrent protection bistable circuit 7, when load side overload, short circuit, in resistance R
17Produce big voltage drop, make normal saturated triode T
6The emitter current potential raises, and speed ends, the bistable circuit upset, and its collector output high voltage is added in triode T
7Base stage makes it saturated, makes the triode T of Fig. 2
14Base stage connects and is that zero potential, collector are closed and has played overcurrent protection, and having only ought be artificially by its button NY
1, circuit can recover.Capacitor C in the circuit
3To be in order guaranteeing to start instrument, to make triode T
6Reliable first conducting is an operate as normal.
4.+12 volt stabilized voltage supply loop:
This stabilized voltage supply is to adjust the loop and provide+12 volts of voltage sources for bistable overcurrent protection loop, DC pulse, time, and maximum out-put supply is 500 milliamperes, and regulation factor is better than 0.05%, and dynamic resistance is less than 20 milliohms, and input voltage+18-20 lies prostrate.Whole automatic adjustment is operational amplifier 8(F007) to serve as, output inserts mu balanced circuit 9, and it is according to stabilivolt D
19Reference voltage is adjusted potentiometer R
21, making it output voltage is+12 volts of voltages.Itself is by resistance R
22With triode T
10Form this overcurrent protection.
5. monostable DC pulse, time are adjusted the loop
This loop is an emitter-base bandgap grading coupling monostalbe trigger, goes control chart 2 voltages to adjust triode T
17Base stage makes it to become on-off action.When not having the trigger pip input, monostable DC pulse, time are adjusted the triode 10(T in loop
12) be saturated, make stabilivolt D
23The conducting noble potential, so this triode ends, collector output noble potential makes Fig. 2 triode T
19(switching tube) collector saturation voltage and and be zero potential, to triode T
17End its emitter institute on-load no-voltage.When test, the hand NY that touches the button
2Or oscillograph (microcomputer) interlock, make this circuit " upset ", triode T
12In certain setting time, end output noble potential, stabilivolt 11(D23) conducting, triode 12T
13Saturated, the output zero potential is added in Fig. 2 triode switch 13T
19Base stage is also ended, and makes switch series connection voltage stabilizing triode 14T
17Base stage no longer is a zero potential, and conducting is also exported certain voltage, adds on the tested load, (is meant capacitor C through certain hour
7, C
8By triode T
11To R
34, R
32Discharge time), this moment triode T
12Base stage is that negative potential is along with capacitor C
7, C
8Discharge rises to gradually+and about 0.5 volt, circuit speed " upset " becomes saturatedly by ending, and makes Fig. 2 triode T
19Saturated, triode (switching tube) ends, and realizing loading for it for one is the pulse of a rectangle DC voltage, and corresponding DC voltage pulse width is by capacitor C
7, C
8, resistance R
32, R
34Decide discharge time, is provided with the change capacitor C on the instrumentation table card
7, C
6Be worth big or small scale value knob, so that 0-500 millisecond when obtaining required pulse.In addition at its loop button NY
2Jack G in parallel
3, aim at oscillograph or microcomputer the interlock and establish.
6. DC voltage is adjusted loop: Fig. 2
From direct supply or from the mobility scale that Fig. 1 rectification, filter circuit obtain direct supply voltage is 200-250V, it must be adjusted to 190 volts, guaranteeing following each loop voltage stability, and guarantee to be reflected in load and survey not changing and precision of pulse voltage amplitude.
It is the series regulator pattern that this voltage is adjusted the loop.Reference voltage is by resistance R
40With underwater pipeline stabilizing 17(D
28) mu balanced circuit formed and producing, in order to keep triode T
15The emitter current potential is constant, as adjusting and comparative standard.By resistance R
42, R
41, R
43 Form sample circuit 15, obtaining its output voltage is V
0, the relatively back difference of this voltage and reference voltage is through triode 16(T
15) after the amplification, control voltage-reg-ulator tube T
14Base voltage, thereby make its output voltage be transferred to required value, and settle out.Capacitor C in the loop
9Mainly be to adjust triode 18(T by voltage
14) further reduce the voltage amplitude of ripple; Capacitor C
10Act as: when load increases suddenly (or pulse), pulse current of discharge generation makes stabilized voltage supply have bigger dynamic perfromance, makes it further to guarantee triode T
17When producing potential pulse, and cause that voltage magnitude changes.
7. survey high-voltage switch gear, actuating of relay voltage or return voltage and adjust loop such as Fig. 2
1) operation voltage adjustment: be adjusted at and have scale value voltage potentiometer 19(R on the instrument card
48), make at shunt voltage and adjust triode 20,21(T
16, T
18) base current each at 15-3 milliampere electric current.One side triode T
16Collector voltage changes to required value thereupon, is added on high-voltage switch gear mechanism or the relay coil.On the other hand, triode T
18Collector voltage changes with base current, and is added in series voltage adjustment triode T
17To reduce or its collector voltage that raises, cooperate simultaneously with the load shunt voltage and adjust triode T on the base stage
16Collector voltage changes, and is series voltage adjustment pipe T
17, at shunt voltage adjustment (fine tuning) triode T
16Collector and its shunt load need be voltage when higher, collector voltage reduces few so, so that more multivoltage adds in shunt voltage adjustment transistor collector and the load, otherwise it is then anti-, because the special adjustment mode of this cooperation, make to be adjusted to be added in load pulse voltage, not influenced by the load size, and the stability of pulse magnitude of voltage when guaranteeing that high-voltage switch gear is added in high electrically opening and closing mechanism, relay-coil resistance greater than 40 ohm.When test, as long as will have the potentiometer of scale value voltage on the instrument card, be transferred on the required voltage scale value, by its Action Button (in the monostable loop), triode (switching tube) T
19End, make its series voltage adjustment pipe T
17The base potential value no longer is zero ending, but by the conducting at the appointed time of above-mentioned regulated voltage value, sends the DC voltage pulse square wave, realizes load impulse form voltage tester.
2) return voltage test
By its return voltage button 22(NY
3), it has three contacts, and two contacts are adjusted loop and triode T with its operation voltage
19Collector disconnects, and another contact is connected capacitor 23(C
11Charge circuit on the one hand to its charging, makes to be added in triode T
16, T
18Base voltage rises gradually; On the other hand, simultaneously owing to moment triode T this moment
16Collector cut-off, and series voltage adjustment pipe T
17Base potential is being not zero, and its base current is by by the saturated resistance R that is provided with
50The current saturation conducting is provided, makes 190 volts of supply voltages all be added in (triode T in the load
19By), high-voltage switch gear or relay are with quick acting.Simultaneously because capacitor C
11The rising gradually of voltage is triode T
16, T
18Base current is provided, and collector voltage descends gradually, adds to series voltage and adjusts triode T
17Base stage by the unsaturation of saturation conduction trend or end, descends load voltage, returns to switch or relay.
8. electrical verification pressure, voltage table access, pulse action signal circuit, Fig. 2
1) electrical verification hydraulic circuit: be by resistance R
53, R
54With light emitting diode D
34, D
35And resistance R
54With light emitting diode D
35, D
36The electrical verification hydraulic circuit of forming 24,25 is verified to be access in line whether there is generating positive and negative voltage in generation, when jack is access in when having positive and negative plug light emitting diode D
33-D
36Luminous, warn testing crew, please check, otherwise the scaling loss instrument, capacitor C in its loop
14, C
13Be for eliminating the induced electricity that plug brings, in case the light emitting diode mistake is luminous.
2) voltage table inserts loop 26: by switch K
1(220 volts, 0,3VA) and resistance R
56-R
58Form, as switch K
1Be transformed to when connecing the survey supply voltage, voltage table passes through resistance R
57, R
58Extract corresponding No. 2 terminals current potential 0-10V voltages in proportion, carry out voltage tester.As switch K
1Be transformed to when surveying the load voltage position, can measure pulse action voltage and return action voltage.
3) the pulse signal loop 27: by resistance R
59, R
60, capacitor C
12, voltage stabilizing diode D
3Form, when pulse voltage adds to load side suddenly, through two utmost point stabilivolt D
37Ration the power supply and press volt, by capacitor C for 30-32
12Become pulse and be added to Fig. 4 and count type and trigger in the stable state loop, this circuit sending signal, and keep.
4) oscillograph (microcomputer), high-voltage switch gear, relay coil interface loop: when oscillograph or microcomputer insert, must be inserted into jack 28(G
4, G
6, G
8, G
10, G
12) and G
14, otherwise scaling loss oscillograph vibrator, microcomputer; High-voltage switch gear, the relevant test data of relay, when needing oscillograph or microcomputer, its coil interface must insert jack G
5, G
7, G
9, G
11, G
13And G
15, through current-limiting resistance 29(R
61, R
64, R
67, R
70, R
73, R
76) get the current changing signal of its switch, relay coil, pass through resistance R
02, R
06(other are identical) feeds back in oscillograph vibrator or the microcomputer.When high-voltage switch gear, when relay is surveyed operation voltage, its coil is inserted jack G
16Or G
17, G
18Get final product.
9. voltage table test sample maintenance, voltage-mode become the frequency inverted loop, and be shown in Figure 3.
1) power taking pressure ratio example loop: this loop is by Fig. 2 interface 8 ends, by resistance R
56, R
57, R
58Extract a certain size voltage, corresponding interface 2 current potentials are the 0-10 volt, join in the transconductance type operational amplifier sampling hold circuit.
2) sampling hold circuit 30 is amplified in the transconductance type computing, the basic sampling hold circuit that utilizes F3080 to form, operational amplifier Y
2Output terminal is connected to N-channel MOS field effect transistor 31(3D06), and feedback connects to form the form of voltage follower, electric capacity and circuit output end isolation that operational amplifier is exported.3000PF electric capacity is promptly as memory electric capacity, again with resistance R
83Do phase compensation together, to guarantee working stability.Because operational transconductance amplifier has than the much higher output impedance of conventional operational amplifier, its output impedance is determined to guaranteeing memory electric capacity 32(C during keeping up to more than 100 megaohms
20) leak almost nil by amplifying output terminal.Because its load is the metal-oxide-semiconductor field effect transistor of high impedance, therefore can about 100dB open-loop gain.Because with feedback resistance R
82Shunt capacitance C
17Be used for suppressing high frequency noise; Electric capacity 33(C between the positive-negative power
18), be that power supply removes lotus root electric capacity, source resistance R
845 milliamperes quiescent current when determining zero volt.At operational amplifier Y
2On wiring 5 posts, pass through resistance R
81, through oscillograph or microcomputer and relay, switch auxiliary contact and K
2No. 2 ends of ground connection zero potential when it is high level (zero volt), makes operational amplifier Y
2Work, and make output voltage V
0Follow and extract voltage Vi, meanwhile, also fill to such an extent that guarantee this required voltage on the memory electric capacity; When sampled signal is low level or operational amplifier Y when not having current potential
2Do not work, be off state, circuit enters hold mode, and electric capacity is kept original voltage, and makes output voltage V
0Remain unchanged, sample until next time.
3) voltage transitions frequency loop: that tested voltage transitions is become that a certain size frequency loop adopts is a charge balance type VFC, operational amplifier 34(Y
3) form integrating amplifier, and CH7555 timer 35 is formed a monostalbe trigger, when the voltage of trigger end (2 pin) does not drop to triggering level as yet, pin 3 output low levels, discharge end (7 pin) is connected with ground.So triode 36(TB) end the D in the diode group 37
43, R
44Conducting, D
42End.At this moment import a positive voltage Vi(0-10 volt), then operational amplifier output descends, and drops to CH7555 circuit triggers level always, the output positive pulse.During positive pulse, triode TB conducting, collector potential is approximately zero, so diode D
43, R
44End D
42Conducting provides steady current If by triode TA, because of If greater than Ii, so the output of operational amplifier begins to rise.This moment is because of discharge end open circuit, capacitor C
25Charging, up to being higher than CH7555 circuit valve threshold voltage, output 2 comes back to low level, and above process constantly repeats, and produces cline frequency is added to Fig. 4 for the 0-10KHz pulse No. 10 ends.
Voltage table test potential frequency, waveform adjust, time control loop schematic diagram 4
1) voltage becomes the frequency pulse waveform loop of adjusting: the voltage-frequency signal that arrives from No. 10 ends is imported into coupling condenser 38(C
28, C
27, C
28), this adopts nonpolarity connection and two antiparallel diode 39(D of AC coupling
48, D
49), the double limiting effect, be limited in 0.6 volt.Triode T
21Be emitter follower 40, play the impedance conversion effect, to improve the output resistance of passage.Operational amplifier 41(CF709) Y
7Be connected into the polarity-inverting amplifier form, signal risen amplify and shaping operation, and 35dB(55 is arranged doubly) gain, therefore make output signal enter the amplifier nonlinearity district and by upper and lower amplitude limit, wave crest is pruned, and becomes square wave, at amplifier out again because diode 42(D
50) following amplitude limit effect, make amplifier have only the output of 0-11 volt square wave, be added in control gate triode 43(T
22) on the base stage, the square wave of collector outputting standard inputs to the counting show circuit.
2) control of master control door time, crystal oscillation loop: when surveying return voltage, supply voltage, should be with its K switch
4At open position, close K and run jointly
5, its loop noble potential passes through resistance R
ABe added in integrated circuit 44(J
6) terminals 15 pin, its place door is opened, the pulse of crystal oscillation loop time by this door, is reflected at integrated circuit 48(J smoothly
2) in, beginning gate time, integrated circuit J when it counts 300ms
512, No. 11 end reactions be the overall height current potential, add at integrated circuit 6,11,12 terminals, make terminals reaction noble potential No. 8, be added in master control door triode 47(T
23) base stage, this triode is saturated, and current collection is zero potential very, and this door is closed, and pulse stops output, and the video data that at this moment is reacted in the display circuit is the magnitude of voltage of surveying, and after having surveyed, recovers K switch
4Close position, K
5Open, make instrument survey pulse condition, trigger circuit 45(J
1) be the control gate circuit, crystal oscillation loop 46 output terminals insert 16 pin of integrated circuit 44.
3) the counting type always triggers the stable state loop: be added to the steady loop 9 of total triggering when Fig. 2 pulse signal sends momentary pulse, make it No. 10 terminals of integrated circuit and become high level, and memory and trigger other circuit.
Two, survey high-voltage switch gear, relay actuation time, same period principle and debugging.Fig. 5,6,7
1. high-voltage switch gear fracture, relay tip, oscillograph or microcomputer interface circuit theory: its high-voltage switch gear fracture or relay tip amount to 6 and are linked into G
20-G
25Oscillograph or microcomputer are linked into G
26-G
31When contact or fracture are connected on interface G
20,+12 volts of power supplys make amplifying circuit 49 triode T through contact or fracture
26Conducting produces voltage signal at its emitter, reflects its contact open or disconnected situation of change; Simultaneously at its loop stabilivolt 51(D
51) produce 3 volts of voltages, through the resistance R of reduction voltage circuit 50
119, R
120Step-down makes oscillograph, microcomputer from interface G
26Being met amplitude requires contact or fracture to change (cut-offfing) voltage signal.Other five circuit theories are same as described above.
2. survey high-voltage switch gear fracture, relay tip branch or close the selection loop: this loop is by integrated circuit 52,53,54(J
7, J
8, J
9) form, work as K switch
6When being placed on the A position, high level is added in integrated circuit J
7, J
8, J
9In, what make the ic output reaction is sub-gate signal, is added in Fig. 6 fracture or contact time, contemporaneous vein on the master control door, otherwise with K switch
6Be placed on the B position, reaction is a switching signal.
Actuation time, the same period time pulse door and test pattern 6
1) each fracture or contact test deciliter actuation time: when the DC voltage pulse was added in Fig. 2 high-voltage switch gear or relay coil two ends, Fig. 4 counter always triggered the stable state loop and sends stable high level+12 volt, is added in integrated circuit 55,56,57(J
10, J
11, J
12) in each with the door (interface is No. 12); Select loop next fracture or contact point signal A by Fig. 5 simultaneously
1, A
2, B
1, B
2, C
1, C
2Be high level, integrated circuit J so
11, J
12Corresponding master control gate output terminal CPA
1, CPA
2, CPB
1, CPB
2, CPC
1, CPC
2Frequency is 10KHz or 100KHz rectangular wave pulse, is added in the pulse input end of display circuit, the beginning count pulse; It selects the signal of loop output terminal moment after the high-voltage switch gear or the actuating of relay, be not high level but low level-12 volt, its corresponding master control door is closed, and the output pulse stops, counter stops counting, and screen data is exactly each fracture actuation time so.
2) each high-voltage switch gear fracture or the relay tip test loop same period
A, existing be the example explanation with first and second high-voltage switch gear fracture test same period: at first see Fig. 7, the signal A that selects the loop from Fig. 5
1, A
2High level is added in integrated circuit 58,59(J
13, J
14) corresponding with the door and or the door on, make output signal A
3Be low level, at this moment A
dBe low level, be reflected into integrated circuit 60(J
15) the anti-phase A that is output as
5High level, and be reflected at integrated circuit J
10In the corresponding master control door, work as A
1Or A
2Any one signal sends low level because of the switch motion time, makes A
3In time send high level, make the integrated circuit J of Fig. 6
10Corresponding master control door is opened pulse CPA, and frequency is 100KHz, is added in display circuit CPA terminals, and beginning count pulse number is worked as A
2Or A
1When last also moves, i.e. A
1, A
2A when all being low level
5Be low level, remove to close Fig. 6 integrated circuit J
10Corresponding master control door, the pulse of CPA end stops, and counter stops counting, and screen data is first and second fracture time same period.Other two fractures (contact) test philosophies same period are with above-mentioned the same.
The fracture of b, six high-voltage switch gears, relay or the contact deciliter test same period: at first see six fractures of Fig. 7 or a contact starting same period door loop, by A
3, B
3, C
3What react is two fractures or the contact signal same period, is added in integrated circuit J
14In the respective doors,, and be added in integrated circuit J through inverter loop output Ep low level
13In the respective doors, output be high level Et, the integrated circuit J that the signal Ep of output and Et add at Fig. 6
10In the respective doors, this door is closed.When six fractures or contact had an action, Ep sent high level this and door output pulse (100KHz) CPS is added on the CPS so, and counter begins the count pulse number; When last fracture or contact in six fractures moved, signal Et was a low level, closes Fig. 6 integrated circuit J
10Corresponding and door, pulse signal disappears, and counter stops counting, and screen data is six fractures or the contact time same period.Always trigger button NY in the loop by counter among Fig. 3
4, the integrated circuit in the instrument all resets.
The utility model+12 ,-12 volts of stabilized voltage supply loops provide among Fig. 9,10
1.-12 volt stabilized voltage supply loop: this is that an output current is the negative stabilized voltage supply of the adjustable W337 of 3A.Resistance R
182, R
183Be the coiling sampling resistor of precision in 2%, can guarantee 300 milliamperes of current-sharing precision, when the electric current that flows through two voltage stabilizer W337 is unequal, to produce differential mode voltage at operational amplifier output terminal and the operational amplifier output voltage be raise or reduction, thereby the voltage and current of regulating the three terminal regulator W337 that is controlled reaches new balance up to circuit.Output voltage is adjusted to-12 volts (its setting range is-the 1.25--15 volt).Its operational amplifier also can be selected F3140, CH3130 etc. for use.
2.+12 volt stabilized voltage supply loop: its reference voltage is by R
190, R
191Provide, produce positive feedback, in order to be added in integrated circuit J
169It is stable to make it normal output.Adjust resistance R
188Value can change and is added in three terminal regulator W7805 input voltage, and output voltage is changed, and adjusts triode T
41Thereby the collector voltage difference is adjusted output voltage at+12 volts.
3.1.5 volt stabilized voltage supply loop
This power supply is used for the display screen filament supply.
Four, the anti-interference problem of instrument
In using at the scene, may have very big strong-electromagnetic field and electrostatic induction voltage and be added in and produce auxiliary voltage in the metering circuit, can cause that the inaccurate or instrument of reading can't work, even burn.For fear of this type of problem, this instrument is provided with anti-electromagnetic field, electrostatic field disturbs the loop, and selected the strong PMOS integrated circuit of 5G600 series antijamming capability (because of its inside is provided with additional anti-electrostatic effect measure) for use, when making, the instrument inner casing is provided with metallic shield, makes equipment anti-interference ability more than 150dB.
Principle of work of the present utility model is achieved in that
1. testing high voltage switch, actuating of relay voltage, return voltage principle.
In Fig. 1, provide on-the-spot for convenience the use, adopt interchange, direct supply, when being AC power, insert power hole G
1Through rectifying and wave-filtering, adjust the loop, be output as 220 volts of DC voltage, adjust the loop to voltage extracting on the one hand and extract+40,20 volts of voltages, give this instrument provide ± 15V, ± 12V and+power supply of 1.5 volts of source of stable pressure, in addition aspect instrument power source voltage is by adjusting the loop, adjusts on 190 volts of scale values (this is convenient to this instrument is 220 ± 10% to establish in the power source change scope), and this scale value voltage adds to triode T
17, T
16On, adjust resistance in action, the return voltage loop, change is added to triode T
17, T
16The base current value, just changed the collector output voltage, simultaneously triode T
17Promptly,, carry out time control by the pulse control loop also as pulse switch as voltage coarse regulation effect.When adjusting the loop button by pulse generation, time, produce certain amplitude, width (adjustable 10-500 millisecond) rectangle direct current square-wave pulse, by the trigger action loop, through this power loop amplification, remove to control triode T
19Base stage makes collector remove short circuit triode T
17Base stage is a zero potential, realizes triode T
17On-off action, be reflected in so in the loop be exactly one mix up in advance, a certain size, width (time) rectangle DC voltage pulse square wave.This square-wave voltage adds in the following loop: 1) microcomputer, oscillograph interface loop, realize microcomputer, the test of oscillograph relevant data; 2) switch, relay coil interface loop are realized action voltage test; 3) voltage extracting sampling circuit is given a certain size numerical value voltage of digital voltmeter, realizes the magnitude of voltage test; 4) total trigger circuit realize that each loop (same period, actuation time etc.) starts and locking.
This instrument is provided with the overcurrent protection loop, and when there were short circuit, overload in above-mentioned loop, automatic open and close lock sent block signal, and until artificial recovery, instrument can be reworked, and reliably guarantees not by scaling loss, and prevents to influence the transformation station power supply operate as normal.Instrument voltage table test philosophy: at first, that potential pulse (or return voltage) is big or small by a certain percentage from extracting the loop, feed back in voltage table sampling maintenance loop, the gained magnitude of voltage is the 0-10 volt, so that behind the loss of voltage, can keep certain hour, and feed back to electric voltage frequency conversion loop, realize analog to digital conversion (voltage becomes frequency), the generation frequency is 1-10KHz, by the master control door, at the appointed time, the beginning count pulse promptly feeds back to counter, register, display.Whether the master control door is beaten key and is pulse gate, it, is sent signal and closes maintenance when pulse (or voltage) is received in total triggering loop by total triggering circuit controls, through enabling pulse, make the loop pulse of voltage table 10KHz crystal oscillation smoothly by starting impulse and door, add to the Time Triggered locked loop, through 300 milliseconds of times, block signal is sent in its pulse gate loop, add to the master control door, stop counting, promptly the voltage table test finishes in 300 milliseconds.
Slowdown monitoring switch, each contact of relay (fracture) deciliter time, the same period principle: at first high-voltage switch gear fracture or relay tip are linked into the loop, when surveying to the closing time or the same period, to select branch or close the signal circuit switch to be placed on and to close the position, it becomes the survey switching signal, select so can only pass through high-voltage switch gear or relay switching signal in the loop, otherwise just pass through sub-gate signal.
1) high-voltage switch gear fracture or action of relay contact time (being high-voltage switch gear or relay actuation time) test: the master control door is come just at initiating signal and is opened, and making the pulse waveform amplitude recirculating loop frequency of adjusting is that 10KHz or 100KHz pulse are added to counter and begin gate time.Close behind selection loop combined floodgate or sub-gate signal to last master control door, all high-voltage switch gear fractures or action of relay contact time test finish, and show.
2) measure high-voltage switch gear fracture or relay tip same period: surveying actuation time simultaneously, high-voltage switch gear fracture, the relay tip same period and six fractures or contact are also measured simultaneously and finish the same periods.Principle is as follows:
A, whole (six) high-voltage switch gear fracture or relay tip are measured the same period: at first see to start loop (or door) a deciliter same period, when six high-voltage switch gear fractures or one of them signal of relay tip are come just output signal of this, start the master control door, the pulse waveform amplitude is adjusted, and to be the 100KHz pulse be added to counter by this door to recirculating loop frequency, the beginning gate time, to wait until the 6th high-voltage switch gear fracture or relay tip all be added to the same period stop loop with the door.It sends signal 1-6 line to the master control door, and the master control door is closed, and counting stops, and the time is passed through display and video data.
B, high-voltage switch gear fracture or relay tip two lines are measured the same period: when fracture (contact) then adds to when starting loop or door the same period, send signal and add to the master control door, making the pulse waveform amplitude recirculating loop frequency of adjusting is that the 100KHz pulse begins gate time by the master control gate counter smoothly, to wait until fracture (contact) all add to the same period stop loop with when door, send signal to the master control door, this door is closed, and counter stops counting, and the time is by the display video data.
Claims (1)
1; pulsed is surveyed the high-voltage switch gear actuating of relay voltage time digital instrument same period; be by ectosome; function button; display pannel; the contact jack; current rectifying and wave filtering circuit; the voltage extracting circuit; current foldback circuit; pulse control circuit; pulse-generating circuit; the voltage table sampling keeps the loop; electric voltage frequency conversion loop; the frequency pulse waveform; the amplitude transformation circuit; amplify trigger circuit; the Time Triggered exclusive circuit; the master control door; counter; display circuit; oscillograph inserts the loop; the switch relay coil inserts the loop; the total triggering and zero clearing loop composition; it is characterized in that bridge rectifier filter circuit 1 inserts mu balanced circuit 3 behind dividing potential drop and variable resistor 2; the output of mu balanced circuit inserts low pressure extraction adjustment circuit 4 through dividing potential drop and variable resistor respectively, and low pressure extracts the transistorized T in loop
3, T
4Base stage is connected to temperature compensated diode 5,6 respectively, the output access transistor T of overcurrent protection bistable circuit 7
7, T
7Output inserts instrument action (returning) potential pulse, oscillograph (microcomputer) interface circuit, the output terminal that the voltage in positive 12 volts of stabilized voltage supply loops is adjusted operational amplifier 8 automatically inserts mu balanced circuit 9, monostable DC pulse, the output terminal that time is adjusted loop 10 inserts output triode 12 through stabilivolt 11, the output terminal of output triode inserts switching tube 13, the output of switching tube is connected with switch series connection stabilivolt 14, it is tandem type voltage stabilizing pattern that DC voltage is adjusted the loop, sample circuit 15 inserts amplifier tube 16, the emitter-base bandgap grading of amplifier tube is connected to comparator circuit 17, the output terminal of amplifier tube links to each other with voltage-reg-ulator tube 18, survey high-voltage switch gear, actuating of relay voltage or return voltage are adjusted the loop, voltage potentiometer 19 and shunt voltage adjustment (fine tuning) pipe 20 links to each other with 21 on the instrument panel, adjust the emitter and collector that pipe 20 and 21 outputs insert series connection stabilivolt 14 respectively, three contacts of return voltage testing button 22 insert the collector and charging capacitor 23 loops of switching tube 13 respectively, the electrical verification hydraulic circuit of forming by resistance and light emitting diode 24,25 insert switch serial regulating circuit 14 respectively and insert access parallel voltage-stabilizing loop, 26 back, loop 20 through voltage table, pulse signal loop 27 is inserted the counting type and is triggered the stable state loop, oscillograph (microcomputer), high-voltage switch gear, the relay coil interface loop is made up of jack 28 and current-limiting resistance 29 respectively, power taking pressure ratio example loop, voltage table inserts the positive input terminal of the operational amplifier 30 of potentiometer access transconductance type computing amplification sampling hold circuit in the loop, the grid of output terminal and field effect transistor 31 joins, drain electrode and source electrode insert 7 pin and 4 pin of operational amplifier respectively, the grid of field effect transistor also is connected to phase compensating circuit 32, also be connected to decoupling capacitor 33 between the power supply of field effect transistor source electrode and drain electrode, pass through resistance on operational amplifier 5 pin, through oscillograph or microcomputer and relay, switch auxiliary contact and K
2Ground connection, the output terminal of the integrating amplifier of being made up of operational amplifier 34 in the voltage transitions frequency loop inserts the trigger end (2 pin) of the monostalbe trigger of being made up of timer 35, the output terminal of timer links to each other with switching tube 36 input ends, the output terminal of switching tube 36 inserts the negative input end of operational amplifier and inserts the output terminal of operational amplifier through the backfeed loop of being made up of electric capacity and diode after diode group 37, voltage becomes the frequency pulse waveform and adjusts that the output terminal of timer inserts emitter followers 40 through coupling capacitance 38 and limiter diode 39 in the loop, the emitter follower output terminal inserts operational amplifier 41, the input end of the output terminal of operational amplifier Access Control door 43 behind limiter diode 42, the control of master control door time, supply voltage in the crystal oscillation loop is through K
4, K
5And R
ABe added in 15 pin and the trigger circuit 45 of integrated circuit 44, the output terminal in crystal oscillation loop 46 inserts 16 pin of integrated circuit 44,8 pin of integrated circuit 44 insert the transistor base of master control door 47,11,12,17,1 terminal of integrated circuit 44 inserts integrated block count display circuit 48, and high-voltage switch gear fracture or relay tip are linked into by G
20-G
25In the jack of forming, oscillograph or microcomputer are linked into by G
26-G
31In the jack of forming, jack G
20-G
25Insert amplifying circuit 49, jack G by repeating resistance respectively
26-G
31Insert reduction voltage circuit 50 and mu balanced circuit 51 respectively, the output of the emitter-base bandgap grading of amplifying circuit 49 inserts respectively and surveys the high-voltage switch gear fracture, the circuit breaker contact divides or close the integrated circuit 55,56,57 that stable DC level that integrated circuit 52,53,54 trigger circuit 45 of selecting the loop send adds to fracture or contact test circuit deciliter actuation time, fracture or contact point signal by the integrated circuit 52,54 of selecting the loop insert integrated circuit 56,57, and integrated circuit 56,57 corresponding master control gate output terminals add the input end of step-by-step counting.In high-voltage switch gear fracture or the relay tip test loop same period, by the signal A that selects loop integrated circuit 52
1, A
2Be added on integrated circuit 58,59 and the integrated circuit 60 integrated circuit 60B
5, A
5, C
5Insert integrated circuit 55, integrated circuit 55 corresponding master control doors insert pulse-scaling circuits, in six high-voltage switch gears, relay fracture or the contacts test circuit deciliter same period, by A
3, B
3, C
3The fracture or the contact signal same period of reaction are added in integrated circuit 59 respective doors, be added in integrated circuit 58 respective doors and export high level through the inverter loop output low level, above-mentioned low level and high level signal add to integrated circuit 55 respective doors, foregoing circuit is installed in the tool housing 61, and the tool housing face is respectively arranged with high-voltage switch gear fracture or action of relay contact time and the numeral demonstration same period 62, high-voltage switch gear or relay coil interface jack 63, oscillograph vibrator or microcomputer interface 64, the various function keys 65 of instrument, various shift keys 66, various adjustment buttons 67.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93227524 CN2181010Y (en) | 1993-03-09 | 1993-03-09 | Pulse digital meter formeasuring action voltage time of high-voltage switch relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93227524 CN2181010Y (en) | 1993-03-09 | 1993-03-09 | Pulse digital meter formeasuring action voltage time of high-voltage switch relay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2181010Y true CN2181010Y (en) | 1994-10-26 |
Family
ID=33804772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93227524 Expired - Fee Related CN2181010Y (en) | 1993-03-09 | 1993-03-09 | Pulse digital meter formeasuring action voltage time of high-voltage switch relay |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2181010Y (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103033743A (en) * | 2012-12-08 | 2013-04-10 | 青岛大学 | Measuring device of actuation time of switching element |
| CN103983890A (en) * | 2014-05-30 | 2014-08-13 | 广州供电局有限公司 | Search method for fault points generated due to the influence of alternating current crosstalk on relay and test circuit |
| CN105137339A (en) * | 2012-07-27 | 2015-12-09 | 胡小青 | Tester for testing electric leakage breaker |
| CN106526404A (en) * | 2016-12-09 | 2017-03-22 | 成都信息工程大学 | Short circuit and leakage detection device and detection method thereof |
| CN106816068A (en) * | 2015-11-29 | 2017-06-09 | 重庆尊来科技有限责任公司 | A kind of capacitive reactance tester of non-gate |
| CN111025114A (en) * | 2019-12-24 | 2020-04-17 | 福建福顺半导体制造有限公司 | Full-automatic testing arrangement of integrated circuit high frequency electric parameter characteristic |
| CN111638473A (en) * | 2020-06-08 | 2020-09-08 | 西安西电光电缆有限责任公司 | Push rod cable integrated detection device and detection method thereof |
| CN114217155A (en) * | 2021-12-14 | 2022-03-22 | 广东电网有限责任公司 | State detection circuit and terminal of secondary cell clamp plate in distribution network ring main unit |
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1993
- 1993-03-09 CN CN 93227524 patent/CN2181010Y/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105137339A (en) * | 2012-07-27 | 2015-12-09 | 胡小青 | Tester for testing electric leakage breaker |
| CN103033743A (en) * | 2012-12-08 | 2013-04-10 | 青岛大学 | Measuring device of actuation time of switching element |
| CN103983890A (en) * | 2014-05-30 | 2014-08-13 | 广州供电局有限公司 | Search method for fault points generated due to the influence of alternating current crosstalk on relay and test circuit |
| CN103983890B (en) * | 2014-05-30 | 2017-04-12 | 广州供电局有限公司 | Search method for fault points generated due to the influence of alternating current crosstalk on relay and test circuit |
| CN106816068A (en) * | 2015-11-29 | 2017-06-09 | 重庆尊来科技有限责任公司 | A kind of capacitive reactance tester of non-gate |
| CN106526404B (en) * | 2016-12-09 | 2022-12-30 | 成都信息工程大学 | Short circuit and electric leakage detection device and detection method thereof |
| CN106526404A (en) * | 2016-12-09 | 2017-03-22 | 成都信息工程大学 | Short circuit and leakage detection device and detection method thereof |
| CN111025114A (en) * | 2019-12-24 | 2020-04-17 | 福建福顺半导体制造有限公司 | Full-automatic testing arrangement of integrated circuit high frequency electric parameter characteristic |
| CN111025114B (en) * | 2019-12-24 | 2021-10-19 | 福建福顺半导体制造有限公司 | Full-automatic testing arrangement of integrated circuit high frequency electric parameter characteristic |
| CN111638473B (en) * | 2020-06-08 | 2022-11-01 | 西安西电光电缆有限责任公司 | Push rod cable integrated detection device and detection method thereof |
| CN111638473A (en) * | 2020-06-08 | 2020-09-08 | 西安西电光电缆有限责任公司 | Push rod cable integrated detection device and detection method thereof |
| CN114217155A (en) * | 2021-12-14 | 2022-03-22 | 广东电网有限责任公司 | State detection circuit and terminal of secondary cell clamp plate in distribution network ring main unit |
| CN114217155B (en) * | 2021-12-14 | 2023-08-22 | 广东电网有限责任公司 | State detection circuit and terminal of secondary cell clamp plate in distribution network looped netowrk case |
| CN115227971A (en) * | 2022-07-28 | 2022-10-25 | 喻鹏铭 | Autonomic nerve electric stimulator |
| CN115227971B (en) * | 2022-07-28 | 2023-11-24 | 喻鹏铭 | Autonomic nerve electric stimulator |
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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 |