CN201489044U - High-voltage electroscope - Google Patents
High-voltage electroscope Download PDFInfo
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- CN201489044U CN201489044U CN2009201869926U CN200920186992U CN201489044U CN 201489044 U CN201489044 U CN 201489044U CN 2009201869926 U CN2009201869926 U CN 2009201869926U CN 200920186992 U CN200920186992 U CN 200920186992U CN 201489044 U CN201489044 U CN 201489044U
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Abstract
The utility model relates to power equipment, in particular to a self-checking capacitance type alternating-current high-voltage electroscope. The electroscope comprises an input signal series connection resonant filter circuit, an input signal voltage multiplying detection circuit, an input signal detection and intermittent alarm signal oscillation circuit, an alarm acousto-optic signal drive circuit, a power supply voltage monitoring circuit, a Wien 50 Hz sine wave oscillation circuit, a self-checking signal booster circuit, a self-checking signal control circuit, an insulating telescopic operating rod and a power supply circuit. Because a working frequency sine wave signal is adopted for the self-check of the whole circuit, the high-voltage electroscope overcomes the technical shortcomings of poor anti-jamming capability, existence of hidden trouble of misstatement and unreliable self-checking result, and has the advantages of strong anti-jamming capability and reliable self-checking result.
Description
Technical field
The utility model relates to power equipment, is a kind of self check capacitor type ac high-voltage electroscope.
Background technology
Be widely used in the capacitor type electroscope of electric system at present, develop according to the DL740-2000 standard-required mostly.Because producer is understood inadequately its basic functional principle mostly, the data that do not have to quantize are as design authority, and circuit design mainly relies on test figure.Even Design of main circuit is like this, the self check means of product have various defectives unavoidably, have the hidden danger of wrong report.
The capacitive based self-checking circuit of tradition check, often with working power as self-test signal, skip sample circuit and directly receive the input end that triggers element, problem just can't be found if sample circuit has loose contact etc.
The producer that has is for fear of the problems referred to above occurring, working dc power directly is added to the electroscope input end when the self check, make whole circuit self check product, though this way all detects input circuit cell, but because of what give is direct current signal, can not determine that still can electroscope, operate as normal when detecting the industrial frequency AC high-voltage signal.In the input circuit of this class circuit capacitance is not set in addition, interference free performance is poor.
The voltage that some electroscopes adopt high-frequency signal to promote self-test signal is done the product that paired whole circuit detects, and simultaneously, also has some galvanoscopic self-test signals to adopt the square wave power frequency component, and well-known, square wave contains a large amount of high-frequency harmonic compositions.This an important problem just occurs: if self-test signal contains a large amount of radio-frequency components, even if there is open fault in galvanoscopic sampling circuit, still may starts electroscope by discrete parameter and report to the police when self check, can not accurately reflect galvanoscopic duty.
By above-mentioned analysis, most of in the market as can be known galvanoscopic self-detection results are very unreliable, the qualified situation of flase drop might occur.Bring serious potential safety hazard for the work on the spot of high voltage electric power equip ment, need reasonably be solved.
The utility model content
Technical problem to be solved in the utility model provides that a kind of antijamming capability is strong, the reliable high voltage electroscope of self-detection result.
The technical scheme that the utility model adopted is: high voltage electroscope comprises input signal series resonance filtering circuit, input signal multiplication of voltage detecting circuit, input signal detection and intermittently alerting signal oscillatory circuit, chimes of doom light signal driving circuit, supply voltage monitoring circuit, Wen 50HZ sine wave oscillation circuit, self-test signal booster circuit, self-test signal control circuit, the flexible control lever of insulation, power circuit, wherein:
The input signal that is produced by exploring electrode is connected with input signal series resonance filtering circuit, input signal series resonance filtering circuit pass through input signal multiplication of voltage detecting circuit, input signal detection with intermittence the alerting signal oscillatory circuit be connected with chimes of doom light signal driving circuit;
Wen 50HZ sine wave oscillation circuit is connected with input signal series resonance filtering circuit through self-test signal booster circuit, self-test signal control circuit, self check keyswitch;
Supply voltage monitoring circuit is connected with power circuit with the self-test signal control circuit respectively;
Power circuit is connected with intermittently alerting signal oscillatory circuit, chimes of doom light signal driving circuit with input signal series resonance filtering circuit, input signal multiplication of voltage detecting circuit, input signal detection respectively, and passes through the self check keyswitch and be connected with Wen 50HZ sine wave oscillation circuit, self-test signal booster circuit, self-test signal control circuit;
The flexible control lever of exploring electrode and insulation is coaxial.
The self check keyswitch adopts the dpdt double-pole double-throw (DPDT) button.
Good effect of the present utility model is:
1, device quantizes discrete electric capacity of electroscope work time space and sample detecting electric current in design, optimizes the sample circuit design according to quantized result, makes circuit structure more brief, and self-checking circuit power supply under non-self check state is cut off simultaneously.These scientific and reasonable designs have reduced the fault rate, have reduced the working current of complete machine, thereby have prolonged the serviceable life of button cell, have also reduced the production use cost of product.
2, sampled signal is handled and the integrated chip manufacturing of oscillation drive circuit employing COMS numeral in Zhuan Zhi the warning circuit, has the strong stable and reliable operation characteristics of antijamming capability low in energy consumption.
3, device adopts the circuit that participates in detecting is carried out the self test mode that full loop detects, and prevents to detect the loop fault omission.
4, device adopts the power frequency sine wave signal to carry out self check, and realistic tested characteristics of signals prevents and occurs flase drop because of waveform is different with frequency.
5, the sample circuit of device adopts the power frequency series resonance filtering circuit, has improved the electroscope antijamming capability.
6, according to different electric pressures, the impedance of series resonance filtering circuit in the adjusting gear, make the self check electric current meet the sensing range requirement of national sector standard DL740-2000-5.2.1 bar, improved the reliability of self-check of device, thereby improved the safe reliability that device uses.
7, device adopts Wen's sine-wave oscillator to produce power frequency sine wave, boosts by the miniature Industrial Frequency Transformer of push-pull power amplifier drives, obtains the power frequency sine wave self-test signal.
8, device adopts accurate reference voltage that supply voltage is monitored, and has improved monitoring accuracy, has improved the reliability of self-check of device, thereby has improved the safe reliability that device uses.
Description of drawings
Fig. 1 is the electric probe portion circuit diagram of the utility model,
Fig. 2 is the utility model functional-block diagram.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described.
The utility model is a kind of parameter quantification, have power frequency filtering full loop sine wave signal self check capacitor type ac high-voltage electroscope.Its principle of work is to flow through the electroscope device of indicating ac high-voltage whether to exist of the electric current in the stray capacitance over the ground by detection, and this device partly is made up of electric probe portion and the flexible control lever of insulation.
As shown in Figure 2, electric probe portion is the engineering plastics box that has the metal detection electrode, in input signal series resonance filtering circuit 1, input signal multiplication of voltage detecting circuit 2, input signal detection and intermittently alerting signal oscillatory circuit 3, chimes of doom light signal driving circuit 4, supply voltage monitoring circuit 5, Wen 50HZ sine wave oscillation circuit 6, self-test signal booster circuit 7, self-test signal control circuit 8, power circuit 10 are housed.
The input signal that is produced by exploring electrode is connected with input signal series resonance filtering circuit 1, input signal series resonance filtering circuit 1 pass through input signal multiplication of voltage detecting circuit 2, input signal detection with intermittence alerting signal oscillatory circuit 3 be connected with chimes of doom light signal driving circuit 4;
Wen 50HZ sine wave oscillation circuit 6 is connected with input signal series resonance filtering circuit 1 through self-test signal booster circuit 7, self-test signal control circuit 8, self check keyswitch;
Supply voltage monitoring circuit 5 is connected with power circuit 10 with self-test signal control circuit 8 respectively;
The flexible control lever 9 of the insulation of device adopts the special process manufacturing of epoxy resin and glass fiber material and extrusion modling, has improved the electric withstand voltage of unit length, has reduced the horizontal sag after the maximum tension, and is capable of expansion and contraction, is easy to carry.
The plastic casing housing of electric probe portion adopts ABS engineering plastics injection molded, and is elegant in appearance.
There is the exploring electrode of plating environmental protection nickel the housing top, and the flexible control lever 9 of insulation of exploring electrode and housing below is coaxial, is convenient to the high voltage testing operation.
Physical circuit as shown in Figure 1, the structure and the principle of work of each circuit are described below:
Input signal series resonance filtering circuit 1 is made up of Chip-R R1 and patch capacitor C1, this circuit resonance is in 50 hertz of power frequencies, their characteristic impedance and sample resistance R2 have formed power frequency self-test signal input resulting impedance, can be at the electroscope design respective impedance value of between each 10Kv～330kV electric pressure, to meet the regulation of national sector standard DL740-2000 5.2.1 bar about the starting voltage scope, improve the reliability of self-detection result, thereby improved the safe reliability that device uses.
Input signal multiplication of voltage detecting circuit 2 is made up of paster commutation diode D1, D2 and patch capacitor C1.
Input signal detection and alerting signal oscillatory circuit 3 intermittently, form by Chip-R R2, R3, patch capacitor C4, COMS paster digital circuit U1C, U1D, the input and output of this oscillatory circuit are all isolated through high resistant COMS digital circuit, can guarantee the reliability of its work.
Chimes of doom light signal driving circuit 4 is made up of COMS paster digital circuit U1A, U1B, Chip-R R4, middle power paster triode Q2, ultra-high brightness LED light emitting diode D3, D4, the active hummer F of electromagnetic type.The driving force of COMS digital circuit U1A, U1B use in parallel can raising COMS circuit, current-limiting resistance R4 can protect and improve the serviceable life of COMS circuit.
Supply voltage monitoring circuit 5 is made up of accurate reference voltage DW1, paster operational amplifier U1C, Chip-R R6, R21, R22, R23, R24, paster triode Q3, LED light emitting diode D5, because using accurate reference voltage comes working power is monitored, improved monitoring accuracy greatly, improve self-check of device result's reliability, thereby improved the safe reliability that device uses.
Wen 50HZ sine wave oscillation circuit 6 is by paster operation amplifier circuit U2A, U2B, Chip-R R11, R12, R13, R14, R15, R16, patch capacitor C11, C12, paster commutation diode D11, D12 forms, resistance R 12 and patch capacitor C12 constitute 50 hertz of positive-feedback circuits of antiresonant circuit formation that series resonant circuit and resistance R 11 and patch capacitor C11 constitute, paster operational amplifier U2A is used to improve the positive feedback impedance of antiresonant circuit over the ground, improve the reliability of oscillatory circuit work, paster commutation diode D11, D12 is used to improve sinusoidal waveform.
Self-test signal booster circuit 7 is made up of power frequency miniature transformer T, paster operational amplifier U2D, middle power paster triode Q11, Q12, paster operational amplifier U2D and middle power paster triode Q11, Q12 form push-pull power amplifier, driving power frequency miniature transformer T boosts, in order to improve the effect of boosting, power frequency miniature transformer T is connected into the self coupling mode.
Self-test signal control circuit 8 is made up of dpdt double-pole double-throw (DPDT) button SW (being the self check keyswitch) and patch capacitor C13, and in a single day dpdt double-pole double-throw (DPDT) button SW presses, and one the tunnel connects the self-checking circuit power supply, begins working power is monitored; The wien oscillator circuit is started working simultaneously, and power frequency miniature transformer T begins to export the sinusoidal self-test signal of power frequency.Another road of dpdt double-pole double-throw (DPDT) button SW is delivered to the sinusoidal self-test signal of power frequency on the device exploring electrode by patch capacitor C13, begins the device serviceability is detected.
The flase drop phenomenon that may occur when the electroscope self check occurring, the utility model has adopted the working method that has the self check of power frequency sine wave signal whole circuit.
This galvanoscopic self check loop adopts the 50HZ power frequency sine wave as self-test signal, in the size design range of current that electroscope flows through when 0.2-0.4UN of self check electric current I n, meets national sector standard to galvanoscopic requirement.
Simultaneously, designed jamproof power frequency series resonance filtering circuit, improved antijamming capability, reduced the possibility of wrong report at input circuit.
Because what this novel whole circuit self check capacitor type ac high-voltage electroscope adopted is the self check of whole circuit power frequency sine wave, therefore can observe the sinusoidal waveform that occurs on the electroscope probe with oscillograph when self check.This signal can be used for other capacitor type electroscope is carried out routine inspection simultaneously.
That is to say, this novel whole circuit self check capacitor type ac high-voltage electroscope is except testing mutually, can also provide power frequency sine wave check signal to carry out routine inspection to the electroscope of other type, determine with preliminary whether other type is verified electrical equipment good for use.
Claims (2)
1. high voltage electroscope, comprise input signal series resonance filtering circuit (1), input signal multiplication of voltage detecting circuit (2), input signal detection and intermittently alerting signal oscillatory circuit (3), chimes of doom light signal driving circuit (4), supply voltage monitoring circuit (5), Wen 50HZ sine wave oscillation circuit (6), self-test signal booster circuit (7), self-test signal control circuit (8), the flexible control lever (9) of insulation, power circuit (10), it is characterized in that:
The input signal that is produced by exploring electrode is connected with input signal series resonance filtering circuit (1), and input signal series resonance filtering circuit (1) is connected with chimes of doom light signal driving circuit (4) through input signal multiplication of voltage detecting circuit (2), input signal detection and alerting signal oscillatory circuit at intermittence (3);
Wen 50HZ sine wave oscillation circuit (6) is connected with input signal series resonance filtering circuit (1) through self-test signal booster circuit (7), self-test signal control circuit (8), self check keyswitch;
Supply voltage monitoring circuit (5) is connected with power circuit (10) with self-test signal control circuit (8) respectively;
Power circuit (10) is connected with intermittently alerting signal oscillatory circuit (3), chimes of doom light signal driving circuit (4) with input signal series resonance filtering circuit (1), input signal multiplication of voltage detecting circuit (2), input signal detection respectively, and passes through the self check keyswitch and be connected with Wen 50HZ sine wave oscillation circuit (6), self-test signal booster circuit (7), self-test signal control circuit (8);
The flexible control lever (9) of exploring electrode and insulation is coaxial.
2. high voltage electroscope according to claim 1, it is characterized in that: described self check keyswitch adopts the dpdt double-pole double-throw (DPDT) button.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201869926U CN201489044U (en) | 2009-08-17 | 2009-08-17 | High-voltage electroscope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201869926U CN201489044U (en) | 2009-08-17 | 2009-08-17 | High-voltage electroscope |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201489044U true CN201489044U (en) | 2010-05-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201869926U Expired - Fee Related CN201489044U (en) | 2009-08-17 | 2009-08-17 | High-voltage electroscope |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201489044U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102857193A (en) * | 2012-08-27 | 2013-01-02 | 北京瑞利分析仪器有限公司 | Multichannel integral circuit module, multichannel circuit module group and spectrometer |
| CN103698591A (en) * | 2013-12-06 | 2014-04-02 | 国家电网公司 | Electroscopic device and electroscopic method of near field region of supervoltage or ultra-high voltage transmission line |
-
2009
- 2009-08-17 CN CN2009201869926U patent/CN201489044U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102857193A (en) * | 2012-08-27 | 2013-01-02 | 北京瑞利分析仪器有限公司 | Multichannel integral circuit module, multichannel circuit module group and spectrometer |
| CN103698591A (en) * | 2013-12-06 | 2014-04-02 | 国家电网公司 | Electroscopic device and electroscopic method of near field region of supervoltage or ultra-high voltage transmission line |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100526 Termination date: 20170817 |