CN102313876B - Calibrating device for fully automated high-voltage dielectric loss tester - Google Patents
Calibrating device for fully automated high-voltage dielectric loss tester Download PDFInfo
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Abstract
The invention relates to a calibrating device for a fully automated high-voltage dielectric loss tester, which comprises a data processor, a storage unit, a drive unit and a dielectric loss gear control circuit. The storage unit is connected with the storage port of the data processor, the control signal output end of the data processor is connected with the signal input end of the drive unit, the signal output end of the drive unit is connected with the control end of the dielectric loss gear control circuit, the high-voltage signal input end of the dielectric loss gear control circuit is connected with the high-voltage signal output end of the high-voltage dielectric loss tester to be tested, and the measurement result output end of the dielectric loss gear control circuit is connected with the low-voltage sampling input end of the high-voltage dielectric loss tester to be tested.
Description
Technical field:
The present invention relates to the calibrating technical field of the insulation checkout equipment of electrical equipment, relate in particular to a kind of full-automatic high-pressure dielectric loss tester calibrating installation.
Background technology:
At present, the insulation system of electrical equipment constitutes by various insulating medium, because the electricity of medium is led, friction when dipole rotates in the polarizable medium and the bubble-discharge in the medium, it is lossy making the medium (or whole insulation system) that is under the high voltage, this loss is called dielectric loss, and it is the important indicator of insulation of electrical installation performance.The dielectric loss tester is the instrument and meter for automation of a kind of measuring media loss tangent and electric capacity, can be under power frequency high voltage, dielectric loss tangent value and the capacitance of high pressure equipment such as the various insulating material of in-site measurement, insulating sleeve, power cable, capacitor, mutual inductor, transformer, use very frequently in electric system, verification task is burdensome also.Requirement according to DL/T962-2005 high-pressure medium loss test instrument general technical specifications, calibrating point needs the reference fluid loss device of set point value electric capacity (as 100pF) evenly to choose 20 calibration points in dielectric loss tester loss factor full dose limit to carry out error of indication calibration, and the standard losses device that also needs to choose some definite value electric capacity (as 25pF, 50pF, 1000pF, 10000pF) is chosen three calibration points in upper, middle and lower and carried out error of indication calibration in dielectric loss instrument dielectric dissipation factor amount limit scope.And so far, the reference instrument of domestic calibrating dielectric loss tester is the standard dielectric loss device that gear needs manual switchover, point of every calibrating all needs the testing person to enter the test site inscribe to change next calibrating point, switch between several definite value electric capacity also to need to enter and carry out the thread-changing operation in the test site, not only very loaded down with trivial details, and in the pilot region of 10kV, carry out frequent operation and have great potential safety hazard, this obviously and we require the spirit of the safety in production of increasingly stringent to run counter to, so the development of full-automatic high-pressure dielectric loss tester calibrating installation just seems very necessary.
Summary of the invention:
The purpose of this invention is to provide a kind of full-automatic high-pressure dielectric loss tester calibrating installation.
A kind of full-automatic high-pressure dielectric loss tester calibrating installation, wherein: comprise data processor, driver element, dielectric loss gear control circuit, the control signal output terminal of data processor connects the signal input part of driver element, the signal output part of driver element connects the control end of dielectric loss gear control circuit, the high-voltage signal input end of dielectric loss gear control circuit is used for connecting the high-voltage signal output terminal of high-pressure medium loss test instrument to be measured, and the measurement result output terminal of dielectric loss gear control circuit is used for connecting the low pressure sampling input end of high-pressure medium loss test instrument to be measured.
Described full-automatic high-pressure dielectric loss tester calibrating installation, wherein: this calibrating installation also comprises storage unit, storage unit is connected the storage port of data processor.
Described full-automatic high-pressure dielectric loss tester calibrating installation, wherein: described dielectric loss gear control circuit comprises at least two gear testing circuits, all is connected with relay control contact between the high voltage input terminal of each gear testing circuit and between the measuring-signal output terminal of each gear testing circuit; Each gear testing circuit includes certain value electric capacity, a clamp capacitor, at least two relay control contacts that are connected in series successively, and definite value electric capacity is connected in series mutually with each relay control contact, and clamp capacitor is connected between definite value electric capacity negative pole and the ground; Each relay control contact two ends all for and connect the resistance of respective resistance values.
Described full-automatic high-pressure dielectric loss tester calibrating installation, wherein: each relay control contact two ends and the resistance unit of the corresponding gear resistance that connects; Each resistance unit includes fixed value resistance and the trimmer potentiometer of mutual serial connection, and the resistance of the fixed value resistance in each resistance unit is much larger than the resistance of trimmer potentiometer.
Described full-automatic high-pressure dielectric loss tester calibrating installation, wherein: described dielectric loss gear control circuit comprises first, second, the third gear testing circuit, the high-voltage signal output terminal of described high-pressure medium loss test instrument to be measured connects the input pin of the hilted broadsword folk art term contact of first relay, the high voltage input terminal of the first gear testing circuit connects the normally closed pin of hilted broadsword folk art term contact of first relay, the hilted broadsword folk art term contact of first relay often leaves the input pin that pin connects the second relay hilted broadsword folk art term contact, the normally closed pin of hilted broadsword folk art term contact of second relay connects the high voltage input terminal of the second gear testing circuit, and the hilted broadsword folk art term contact of second relay often leaves the high voltage input terminal that pin connects the third gear testing circuit; The measuring-signal output terminal of the first gear testing circuit connects the normally closed pin of hilted broadsword folk art term contact of the 3rd relay, the output connecting pin of the hilted broadsword folk art term contact of the 3rd relay is used for the output measurement signals, the output connecting pin of the hilted broadsword folk art term contact of the 4th relay connects the hilted broadsword folk art term contact of the 3rd relay and often opens pin, and the hilted broadsword folk art term contact of the 4th relay is normally closed, often open the pin corresponding measuring-signal output terminal that connects second, third gear testing circuit respectively;
The comprise first definite value electric capacity, first clamp capacitor, first ~ the 6th of the first gear testing circuit detect relay normally closed contact, the first definite value electric capacity and first ~ the 6th detects relay normally closed contact and connects successively, and first clamp capacitor is connected between the first definite value electric capacity negative pole and the ground; First ~ the 6th two ends of detecting relay normally closed contact are parallel with the resistance unit of corresponding gear respectively;
Relay normally closed contact is detected in the comprise second definite value electric capacity, second clamp capacitor, the 7th ~ the 12 of the second gear testing circuit, the second definite value electric capacity and the 7th ~ the 12 detects relay normally closed contact and connects successively, and second clamp capacitor is connected between the second definite value electric capacity negative pole and the ground; The the 7th ~ the 12 two ends of detecting relay normally closed contact are parallel with the resistance unit of corresponding gear respectively;
Comprise the 3rd definite value electric capacity, the 3rd clamp capacitor, the 13 ~ the 18 of third gear testing circuit detect relay normally closed contact, the 3rd definite value electric capacity and the 13 ~ the 18 detects relay normally closed contact and connects successively, and the 3rd clamp capacitor is connected between the 3rd definite value electric capacity negative pole and the ground; The the 13 ~ the 18 two ends of detecting relay normally closed contact are parallel with the resistance unit of corresponding gear respectively;
Each resistance unit includes resistance and the trimmer potentiometer of the corresponding gear resistance of mutual serial connection, and the resistance of the resistance in each resistance unit is much larger than the resistance of trimmer potentiometer.
Described full-automatic high-pressure dielectric loss tester calibrating installation, wherein: described driver element comprises shift register and Darlington transistor, the signal input part of shift register connects the control signal output terminal of data processor, the signal output part of shift register connects the signal input part of Darlington transistor, and each pin correspondence of the signal output part of Darlington transistor is controlled powering on of corresponding relay coil.
Described full-automatic high-pressure dielectric loss tester calibrating installation, wherein: this calibrating installation also comprises display unit and controls the unit, the signal input part of display unit is used for connecting the demonstration signal output part of described data processor, and the signal output part of controlling the unit is used for connecting the signal input part of controlling of described data processor.
Described full-automatic high-pressure dielectric loss tester calibrating installation, wherein: this calibrating installation comprises that also for the communication unit that is connected communication with host computer, the data I/O end of communication unit connects the communication terminal of described data processor.
The present invention will reach following technique effect after adopting technique scheme:
Full-automatic high-pressure dielectric loss tester calibrating installation of the present invention, the high-voltage signal output terminal that the high-voltage signal input end of this calibrating installation is connected high-pressure medium loss test instrument to be measured, implemented the conversion of corresponding gear by driver element control dielectric loss gear control circuit by the data processor of this calibrating installation, the high-voltage signal of high-pressure medium loss test instrument output to be measured is by the corresponding gear electric capacity of dielectric loss gear control circuit, reduce to corresponding low-voltage signal behind the resistance, this low-voltage signal is sent to the low pressure sampling input end of high-pressure medium loss test instrument to be measured, by this high-pressure medium loss test instrument to be measured this low-voltage signal is calculated, result of calculation is the dielectric loss value that this high-pressure medium loss test instrument to be measured is handled the corresponding gear that obtains, if this dielectric loss value that obtains departs from the standard value of respective notch, illustrate that deviation appears in this high-pressure medium loss test instrument to be measured, need calibration, so as seen, need not manual operations shift gears fully in the testing process, thoroughly solved the safety guarantee problem of operating personnel under hyperbaric environment, and detect quick and precisely, can improve detection efficiency.
Description of drawings:
Fig. 1 is the structural principle block diagram of full-automatic high-pressure dielectric loss tester calibrating installation of the present invention;
Fig. 2 is data processor in Fig. 1 calibrating installation and the circuit connection diagram of storage unit;
Fig. 3 is the circuit theory diagrams of driver element in Fig. 1 calibrating installation;
Fig. 4 is the circuit theory diagrams of the positive mode of connection of dielectric loss gear control circuit in Fig. 1 calibrating installation;
Fig. 5 a is the series connection model of full-automatic high-pressure dielectric loss tester calibrating installation calibrating principle of the present invention;
Fig. 5 b is the polar plot of corresponding diagram 5 series connection models.
Embodiment:
Full-automatic high-pressure dielectric loss tester calibrating installation of the present invention, as shown in Figure 1, comprise data processor, storage unit, driver element, dielectric loss gear control circuit, storage unit is connected the storage port of data processor, the control signal output terminal of data processor connects the signal input part of driver element, the signal output part of driver element connects the control end of dielectric loss gear control circuit, the A end of dielectric loss gear control circuit can be used as the high-voltage signal input end, be used for connecting the high-voltage signal output terminal of high-pressure medium loss test instrument to be measured, the B end is used for connecting the low pressure sampling input end of high-pressure medium loss test instrument to be measured as the measurement result output terminal; Also the B end of dielectric loss gear control circuit can be used as the high-voltage signal input end, be used for connecting the high-voltage signal output terminal of high-pressure medium loss test instrument to be measured, the A end is used for connecting the low pressure sampling input end of high-pressure medium loss test instrument to be measured as the measurement result output terminal.
Fig. 2 is the circuit connection diagram of storage chip U7 (adopting 25045) in data processor U6 (adopting 8958) and the storage unit, 7,8 pin of data processor U6 connect " up " key on the key panel, the signal output part of " down " key respectively, wherein, " up " gear of whenever pressing when key is gear shift increases progressively once, " down " gear of whenever pressing when key is gear shift successively decreases once, can certainly with infrared remote controller play with respect to operation.Corresponding 17 ~ 10 pin that connect display interface device J9 in the display unit of 32 ~ 39 pin of data processor U6 are used for driving display; 25 ~ 28 pin of data processor U6 are corresponding 1,2,5,6 pin that connect storage chip U7 respectively, and storage chip U7 is used for storage testing result information.
Fig. 3 is the circuit theory diagrams of driver element, described driver element comprises first, second, the 3rd shift register U1, U2, U3 (all adopting 74LS595) and first, second, the 3rd Darlington transistor U4, U5, U6 (all adopting 2803), first, second, the 3rd shift register U1, U2, U3 is cascade successively, 14 pin of the second shift register U2 connect 9 pin of the first shift register U1,14 pin of the 3rd shift register U3 connect 9 pin of the second shift register U2,14 of the first shift register U1,11,12 pin connect 1 of described data processor U6 respectively, 2,3 pin, 11 of the second shift register U2,12 pin connect 2 of described data processor U6 respectively, 3 pin, 11 of the 3rd shift register U3,12 pin connect 2 of described data processor U6 respectively, 3 pin; 15 pin of the first shift register U1 and 1 ~ 7 pin connect 1 ~ 8 pin of the first Darlington transistor U4 respectively, 11 ~ 18 pin of the first Darlington transistor U4 connect first end of the coil of described dielectric loss gear control circuit repeat circuit 1K1A ~ 1K6A and relay K 1A, K3A respectively, and second end of the coil of relay 1K1A ~ 1K6A and relay K 1A, K3A all is connected+the 12V power supply; 15 pin of the second shift register U2 and 1 ~ 7 pin connect 1 ~ 8 pin of the second Darlington transistor U5 respectively, 11 ~ 18 pin of the second Darlington transistor U5 connect second end of the coil of described dielectric loss gear control circuit repeat circuit 2K1A ~ 2K6A and relay K 2A, K4A respectively, and second end of the coil of relay 2K1A ~ 2K6A and relay K 2A, K4A all is connected+the 12V power supply; 15 pin of the 3rd shift register U3 and 1 ~ 5 pin connect 1 ~ 6 pin of the 3rd Darlington transistor U6 respectively, 13 ~ 18 pin of the 3rd Darlington transistor U6 connect the 3rd end of the coil of described dielectric loss gear control circuit repeat circuit 3K1A ~ 3K6A respectively, and the 3rd end of the coil of relay 3K1A ~ 3K6A all connects+the 12V power supply;
Fig. 4 is the circuit theory diagrams of dielectric loss gear control circuit, present embodiment is as the high-voltage signal input end with the A of dielectric loss gear control circuit end, be used for connecting the high-voltage signal output terminal of high-pressure medium loss test instrument to be measured, the B end is used for connecting the low pressure sampling input end of high-pressure medium loss test instrument to be measured as the measurement result output terminal; Described dielectric loss gear control circuit comprises first, second, the third gear testing circuit, the high-voltage signal output terminal of described high-pressure medium loss test instrument to be measured connects input pin 3 pin of the hilted broadsword folk art term contact of the first relay K 1A, the high voltage input terminal of the first gear testing circuit connects normally closed pin 5 pin of hilted broadsword folk art term contact of the first relay K 1A, the hilted broadsword folk art term contact of the first relay K 1A is often opened input pin 3 pin that pin 7 pin connect the second relay K 2A hilted broadsword folk art term contact, normally closed pin 5 pin of the hilted broadsword folk art term contact of the second relay K 2A connect the high voltage input terminal of the second gear testing circuit, and the hilted broadsword folk art term contact of the second relay K 2A is often opened the high voltage input terminal that pin 7 pin connect the third gear testing circuit; The measuring-signal output terminal of the first gear testing circuit connects normally closed pin 5 pin of hilted broadsword folk art term contact of the 3rd relay K 3A, output connecting pin 3 pin of the hilted broadsword folk art term contact of the 3rd relay K 3A are used for the output measurement signals, output connecting pin 3 pin of the hilted broadsword folk art term contact of the 4th relay K 4A connect the hilted broadsword folk art term contact of the 3rd relay K 3A and often open pin 7 pin, and the hilted broadsword folk art term contact of the 4th relay K 4A is normally closed, often open pin 5 pin, the 7 pin corresponding measuring-signal output terminal that connects second, third gear testing circuit respectively;
The first gear testing circuit comprises that the first definite value capacitor C 1 (100PF), the first clamp capacitor Ct1, first ~ the 6th detect the normally closed contact of relay 1K1A ~ 1K6A, the first definite value capacitor C 1 and first ~ the 6th detects relay 1K1A ~ 1K6A normally closed contact and connects successively, and the first clamp capacitor Ct1 is connected between the first definite value capacitor C, 1 negative pole and the ground; First two ends of detecting relay 1K1A normally closed contact are parallel with first resistance unit that resistance 1Rs 1 connects with trimmer potentiometer 1W1 and constitutes, second two ends of detecting relay 1K2A normally closed contact are parallel with second resistance unit that resistance 1Rs2 connects with trimmer potentiometer 1W2 and constitutes, the 3rd two ends of detecting relay 1K3A normally closed contact are parallel with the 3rd resistance unit that resistance 1Rs3 connects with trimmer potentiometer 1W3 and constitutes, the 4th two ends of detecting relay 1K4A normally closed contact are parallel with the 4th resistance unit that resistance 1Rs4 connects with trimmer potentiometer 1W4 and constitutes, the 5th two ends of detecting relay 1K5A normally closed contact are parallel with the 5th resistance unit that resistance 1Rs5 connects with trimmer potentiometer 1W5 and constitutes, and the 6th two ends of detecting relay 1K6A normally closed contact are parallel with the 6th resistance unit that resistance 1Rs6 connects with trimmer potentiometer 1W6 and constitutes.
The comprise second definite value capacitor C 2, the second clamp capacitor Ct2, the 7th ~ the 12 of the second gear testing circuit detect relay 2K1A ~ 2K6A normally closed contact, the second definite value capacitor C 2 and the 7th ~ the 12 detects relay 2K1A ~ 2K6A normally closed contact and connects successively, and the second clamp capacitor Ct2 is connected between the second definite value capacitor C, 2 negative poles and the ground; The 7th two ends of detecting relay 2K1A normally closed contact are parallel with the 7th resistance unit that resistance 2Rs 1 connects with trimmer potentiometer 2W1 and constitutes, the 8th two ends of detecting relay 2K2A normally closed contact are parallel with the 8th resistance unit that resistance 2Rs2 connects with trimmer potentiometer 2W2 and constitutes, the 9th two ends of detecting relay 2K3A normally closed contact are parallel with the 9th resistance unit that resistance 2Rs3 connects with trimmer potentiometer 2W3 and constitutes, the tenth two ends of detecting relay 2K4A normally closed contact are parallel with the tenth resistance unit that resistance 2Rs4 connects with trimmer potentiometer 2W4 and constitutes, the 11 two ends of detecting relay 2K5A normally closed contact are parallel with the 11 resistance unit that resistance 2Rs5 connects with trimmer potentiometer 2W5 and constitutes, and the 12 two ends of detecting relay 2K6A normally closed contact are parallel with the 12 resistance unit that resistance 2Rs6 connects with trimmer potentiometer 2W6 and constitutes.
Comprise the 3rd definite value capacitor C 3, the 3rd clamp capacitor Ct3, the 13 ~ the 18 of third gear testing circuit detect relay 3K1A ~ 3K6A normally closed contact, the 3rd definite value capacitor C 3 and the 13 ~ the 18 detects relay 3K1A ~ 3K6A normally closed contact and connects successively, and the 3rd clamp capacitor Ct3 is connected between the 3rd definite value capacitor C 3 negative poles and the ground; The 13 two ends of detecting relay 3K1A normally closed contact are parallel with the 13 resistance unit that resistance 3Rs1 connects with trimmer potentiometer 3W1 and constitutes, the 14 two ends of detecting relay 3K2A normally closed contact are parallel with the 14 resistance unit that resistance 3Rs2 connects with trimmer potentiometer 3W2 and constitutes, the 15 two ends of detecting relay 3K3A normally closed contact are parallel with the 15 resistance unit that resistance 3Rs3 connects with trimmer potentiometer 3W3 and constitutes, the 16 two ends of detecting relay 3K4A normally closed contact are parallel with the 16 resistance unit that resistance 3Rs4 connects with trimmer potentiometer 3W4 and constitutes, the 17 two ends of detecting relay 3K5A normally closed contact are parallel with the 17 resistance unit that resistance 3Rs5 connects with trimmer potentiometer 3W5 and constitutes, and the 18 two ends of detecting relay 3K6A normally closed contact are parallel with the 18 resistance unit that resistance 3Rs6 connects with trimmer potentiometer 3W6 and constitutes.
Insulating material or structure with loss, the equivalent circuit that common available series connection or parallel resistor, electric capacity are formed and corresponding polar plot are represented, and the dielectric loss factor standard that adopts in this calibrating installation adopts the series connection model, shown in Fig. 5 a, Fig. 5 b.
By P=U
rI=U
cTg δ I
So tg δ=U
r/ U
c=wR
sC
s
When the resistance of resistance R s increased, tangent value tan δ also increased; Parameter δ has reflected the size of dielectric loss, so title dielectric loss angle, the tangent value tan δ of dielectric loss angle then are the important parameters of weighing dielectric loss, can obtain thus, want the size of control medium loss tangent tan δ value, only need the size of controlling resistance Rs to get final product.And the present invention is by data processor U6 control first, second, the 3rd shift register U1, U2, U3 drives first, second, the 3rd Darlington transistor U4, U5, U6, again by control first, second, the 3rd Darlington transistor U4, U5, powering on of corresponding relay coil controlled in the output of each pin of U6, outage realizes the selection of corresponding resistor unit, the resistance value of resistance value for needing in the corresponding resistor unit is set, can import corresponding standard sampling value to high-pressure medium loss test instrument to be measured, if this high-pressure medium loss test instrument departs from corresponding criterion calculation result to the calculating of this sampling value, illustrate that namely deviation appears in this high-pressure medium loss test instrument, need calibration:
Select the first gear testing circuit by data processor U6 during 1, as calibrating:
Needing the tangent value tg δ of detection dielectric loss angle is 0.01% o'clock, at first relay k1A is failure to actuate, 18 pin that data processor U6 controls the first Darlington transistor U4 power on relay 1k1A, its normally closed contact action disconnects, measuring this moment connects on the loop goes up resistance 1Rs1 and trimmer potentiometer 1W1, obtains corresponding dielectric loss angle tangent tg δ and be 0.01% gear.
Select the second gear testing circuit by data processor U6 during 2, as calibrating:
Needing the tangent value tg δ of detection dielectric loss angle is 0.05% o'clock, at first data processor U6 12 pin of controlling the first Darlington transistor U4 make the relay k1A action that powers on, input pin 3 pin of the hilted broadsword folk art term contact of relay k1A connect often opens pin 7 pin, simultaneously data processor U6 controls 11 pin that 17 pin of the second Darlington transistor U5 make relay 2k2A power on, control the first Darlington transistor U4 and makes the relay k3A action that powers on, and obtains corresponding dielectric loss angle tangent tg δ and be 0.05% gear.
Select the third gear testing circuit by data processor U6 during 3, as calibrating:
Needing the tangent value tg δ of detection dielectric loss angle is 5% o'clock, at first data processor U6 12 pin of controlling 12 pin, the second Darlington transistor U5 of the first Darlington transistor U4 make relay k1A, the K2A action that powers on, make high-voltage signal be connected to the third gear testing circuit, simultaneously data processor U6 controls 11 pin that 18 pin of the 3rd Darlington transistor U6 make relay 3K1A power on, control the first Darlington transistor U4 and makes 11 pin of relay K 3A action, the control second Darlington transistor U5 make relay K 4A action, namely obtains corresponding dielectric loss angle tangent tg δ and be 5% gear.
Annotate: in the present embodiment:
Be connected in series the resistance unit of corresponding resistance 1Rs1,2Rs1,3Rs1 respectively, can obtain corresponding dielectric loss angle tangent tg δ and be 0.01% gear;
Be connected in series the resistance unit of corresponding resistance 1Rs2,2Rs2,3Rs2 respectively, can obtain corresponding dielectric loss angle tangent tg δ and be 0.05% gear;
Be connected in series the resistance unit of corresponding resistance 1Rs3,2Rs3,3Rs3 respectively, can obtain corresponding dielectric loss angle tangent tg δ and be 0.1% gear;
Be connected in series the resistance unit of corresponding resistance 1Rs4,2Rs4,3Rs4 respectively, can obtain corresponding dielectric loss angle tangent tg δ and be 0.5% gear;
Be connected in series the resistance unit of corresponding resistance 1Rs5,2Rs5,3Rs5 respectively, can obtain corresponding dielectric loss angle tangent tg δ and be 1% gear;
Be connected in series the resistance unit of corresponding resistance 1Rs6,1Rs6,1Rs6 respectively, can obtain corresponding dielectric loss angle tangent tg δ and be 5% gear.
During debugging according to formula tg δ ≈ 2 ∏ fRs (C+Ct), after but inverse goes out the big probable value of corresponding resistor Rs (each resistance R s adopts the resistance of the low PPM value of high precision in the present embodiment), regulate trimmer potentiometer W again, make the value of resistance R s＞＞resistance of trimmer potentiometer W, can make the testing of this calibrating installation more stable, accurate.Described relay K 1A, K2A, K3A, K4A all adopt the high pressure vacuum relay, the value of clamp capacitor Ct1, Ct2, Ct3 will guarantee that the voltage drop on clamp capacitor is no more than the 400V effective value under the situation of the non-resistance load in that high pressure is arranged, to guarantee this calibrating installation and peripheral operation personnel's safety, so the capacitance of clamp capacitor Ct1, Ct2, Ct3 is generally much larger than the value of the definite value electric capacity of respective notch, but withstand voltagely is no more than one kilovolt and gets final product.
In addition, also the B end of dielectric loss gear control circuit can be used as the high-voltage signal input end, be used for connecting the high-voltage signal output terminal of high-pressure medium loss test instrument to be measured, the A end is as the measurement result output terminal, be used for connecting the low pressure sampling input end of high-pressure medium loss test instrument to be measured, the control procedure of the dielectric loss gear control circuit of this reversal connection please refer to the explanation of above-mentioned Fig. 4, repeats no more here.
Full-automatic high-pressure dielectric loss tester calibrating installation of the present invention, also comprise for the communication unit that is connected communication with host computer, this communication unit comprises communication chip, and the data I/O end of communication communication chip connects communication terminal 10,11 pin RXD pins, the TXD pin of described data processor U6).It is the communication chip of MAX232 that communication chip can adopt model.
Claims (6)
1. full-automatic high-pressure dielectric loss tester calibrating installation, it is characterized in that: comprise data processor, driver element, dielectric loss gear control circuit, the control signal output terminal of data processor connects the signal input part of driver element, the signal output part of driver element connects the control end of dielectric loss gear control circuit, the high-voltage signal input end of dielectric loss gear control circuit is used for connecting the high-voltage signal output terminal of high-pressure medium loss test instrument to be measured, and the measurement result output terminal of dielectric loss gear control circuit is used for connecting the low pressure sampling input end of high-pressure medium loss test instrument to be measured;
Described dielectric loss gear control circuit comprises at least two gear testing circuits, be connected with first relay control contact between the high voltage input terminal of each gear testing circuit, be connected with second relay control contact between the measuring-signal output terminal of each gear testing circuit; Each gear testing circuit includes certain value electric capacity, a clamp capacitor, at least two the 3rd relay control contacts that are connected in series successively, and definite value electric capacity is connected in series mutually with first relay control contact, and clamp capacitor is connected between definite value electric capacity negative pole and the ground; The 3rd relay control contact two ends are all for the resistance unit of corresponding gear resistance in parallel;
Described driver element comprises shift register and Darlington transistor, the signal input part of shift register connects the control signal output terminal of data processor, the signal output part of shift register connects the signal input part of Darlington transistor, and each pin correspondence of the signal output part of Darlington transistor is controlled powering on of corresponding relay coil.
2. full-automatic high-pressure dielectric loss tester calibrating installation as claimed in claim 1, it is characterized in that: this calibrating installation also comprises storage unit, storage unit is connected the storage port of data processor.
3. full-automatic high-pressure dielectric loss tester calibrating installation as claimed in claim 2, it is characterized in that: each resistance unit of the corresponding gear resistance that the 3rd relay control contact two ends are in parallel includes fixed value resistance and the trimmer potentiometer of mutual serial connection, and the resistance of the fixed value resistance in each resistance unit is much larger than the resistance of trimmer potentiometer.
4. full-automatic high-pressure dielectric loss tester calibrating installation as claimed in claim 3, it is characterized in that: at least two gear testing circuits that described dielectric loss gear control circuit comprises are first, second, the third gear testing circuit, the high-voltage signal output terminal of described high-pressure medium loss test instrument to be measured connects the input pin of the hilted broadsword folk art term contact of first relay, the high voltage input terminal of the first gear testing circuit connects the normally closed pin of hilted broadsword folk art term contact of first relay, the hilted broadsword folk art term contact of first relay often leaves the input pin that pin connects the second relay hilted broadsword folk art term contact, the normally closed pin of hilted broadsword folk art term contact of second relay connects the high voltage input terminal of the second gear testing circuit, and the hilted broadsword folk art term contact of second relay often leaves the high voltage input terminal that pin connects the third gear testing circuit; The measuring-signal output terminal of the first gear testing circuit connects the normally closed pin of hilted broadsword folk art term contact of the 3rd relay, the output connecting pin of the hilted broadsword folk art term contact of the 3rd relay is used for the output measurement signals, the output connecting pin of the hilted broadsword folk art term contact of the 4th relay connects the hilted broadsword folk art term contact of the 3rd relay and often opens pin, and the hilted broadsword folk art term contact of the 4th relay is normally closed, often open the pin corresponding measuring-signal output terminal that connects second, third gear testing circuit respectively;
The first gear testing circuit comprises that the first definite value electric capacity, first clamp capacitor, first ~ 6th detect relay normally closed contact, the first definite value electric capacity and first ~ the 6th detects relay normally closed contact and connects successively, and first clamp capacitor is connected between the first definite value electric capacity negative pole and the ground; First ~ the 6th two ends of detecting relay normally closed contact are parallel with the resistance unit of corresponding gear respectively;
The second gear testing circuit comprises the second definite value electric capacity, second clamp capacitor, the 7th ~ 12 detection relay normally closed contact, the second definite value electric capacity and the 7th ~ the 12 detects relay normally closed contact and connects successively, and second clamp capacitor is connected between the second definite value electric capacity negative pole and the ground; The the 7th ~ the 12 two ends of detecting relay normally closed contact are parallel with the resistance unit of corresponding gear respectively;
The third gear testing circuit comprises that the 3rd definite value electric capacity, the 3rd clamp capacitor, the 13 ~ the 18 detect relay normally closed contact, the 3rd definite value electric capacity and the 13 ~ the 18 detects relay normally closed contact and connects successively, and the 3rd clamp capacitor is connected between the 3rd definite value electric capacity negative pole and the ground; The the 13 ~ the 18 two ends of detecting relay normally closed contact are parallel with the resistance unit of corresponding gear respectively;
Each resistance unit includes resistance and the trimmer potentiometer of the corresponding gear resistance of mutual serial connection, and the resistance of the resistance in each resistance unit is much larger than the resistance of trimmer potentiometer.
5. full-automatic high-pressure dielectric loss tester calibrating installation as claimed in claim 4, it is characterized in that: this calibrating installation also comprises display unit and controls the unit, the signal input part of display unit is used for connecting the demonstration signal output part of described data processor, and the signal output part of controlling the unit is used for connecting the signal input part of controlling of described data processor.
6. full-automatic high-pressure dielectric loss tester calibrating installation as claimed in claim 5, it is characterized in that: this calibrating installation comprises that also for the communication unit that is connected communication with host computer, the data I/O end of communication unit connects the communication terminal of described data processor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010217266 CN102313876B (en) | 2010-07-05 | 2010-07-05 | Calibrating device for fully automated high-voltage dielectric loss tester |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010217266 CN102313876B (en) | 2010-07-05 | 2010-07-05 | Calibrating device for fully automated high-voltage dielectric loss tester |
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| CN102313876A CN102313876A (en) | 2012-01-11 |
| CN102313876B true CN102313876B (en) | 2013-07-10 |
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| CN105974344A (en) * | 2016-04-19 | 2016-09-28 | 中国电力科学研究院 | Calibration system and method for relative dielectric loss and electric capacity detector |
| CN107621573A (en) * | 2017-08-11 | 2018-01-23 | 广西电网有限责任公司电力科学研究院 | A kind of dielectric dissipation factor standard of high stability |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2200823Y (en) * | 1994-07-25 | 1995-06-14 | 张俊扬 | Numerical transmission type scene used medium loss element and capacitance tester |
| CN201181327Y (en) * | 2008-04-30 | 2009-01-14 | 江苏省电力试验研究院有限公司 | High voltage standard dielectric loss device |
| CN201707434U (en) * | 2010-07-05 | 2011-01-12 | 河南电力试验研究院 | Full-automatic high-voltage dielectric loss tester verification device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7352190B1 (en) * | 2006-10-17 | 2008-04-01 | Advantest Corporation | Calibration apparatus, calibration method, and testing apparatus |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2200823Y (en) * | 1994-07-25 | 1995-06-14 | 张俊扬 | Numerical transmission type scene used medium loss element and capacitance tester |
| CN201181327Y (en) * | 2008-04-30 | 2009-01-14 | 江苏省电力试验研究院有限公司 | High voltage standard dielectric loss device |
| CN201707434U (en) * | 2010-07-05 | 2011-01-12 | 河南电力试验研究院 | Full-automatic high-voltage dielectric loss tester verification device |
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