CN1135607A - Voltage-resistant test device - Google Patents
Voltage-resistant test device Download PDFInfo
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- CN1135607A CN1135607A CN 95105475 CN95105475A CN1135607A CN 1135607 A CN1135607 A CN 1135607A CN 95105475 CN95105475 CN 95105475 CN 95105475 A CN95105475 A CN 95105475A CN 1135607 A CN1135607 A CN 1135607A
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Abstract
A withstand voltage-testing apparatus comprises a high-voltage generating means for applying a high voltage to work, a ground conductor covering the work with an insulating material, a current transformer around which a conductor connecting the ground conductor and the ground with each other is wound, a variable resistor connected with output terminals of the current transformer, a digital panel meter comprising a detector, and a warning means for displaying that the work is defective when a voltage detected by the detector is higher than a predetermined value.
Description
The present invention relates to a kind of voltage-resistant test device, more particularly, relate to a kind of voltage-resistant test device that is preferably used for measuring the withstand voltage situation of high voltage component, this parts for example can be high-tension cable or its analogs of receiving on the spark plug of explosive motor.In this device, whether there is electric current to leak in the high voltage component in order to detect, used a kind of power pack and a resistance, if just leakage current has been become a kind of voltage when wherein having produced leakage current.
Below first kind and second method be used to measure the withstand voltage of a workpiece, this workpiece can be the high-tension cable of receiving on the spark plug of automobile.
In first method, used the automatic judgement proving installation of discharge-type as shown in Figure 3.In the second approach, whether the operator uses a ground rod inspection to have electric current to leak from workpiece, as shown in Figure 4.
Automatically judge in the proving installation that at discharge-type shown in Figure 3 the interior core conductor 2 that is used as the high-tension cable 1 of workpiece is covered by one deck insulating material 3, insulating material 3 is then surrounded by earth conductor 4.The three needle-discharging equipment of being made up of positive electrode 5a, negative electrode 5b and floating electrode 5c 5 are used as determining apparatus.Positive electrode 5a receives interior core conductor 2, and negative electrode 5b then receives earth conductor 4.Be used to apply a high-voltage pulse by high-pressure generating circuit 6a and oscillatory circuit (OSC) high-voltage pulse generator 6 that 6b formed to the interior core conductor 2 and the positive electrode 5a of discharge equipment 5.
Whether have electric current to leak from high-tension cable 1 in order to judge according to the discharge light that is produced in three electrode needle intercuspal spaces, this installs by one by the light receiving part 8 and the optics leak current detection device of judging that part 9 is formed that are used to receive the discharge light.Light receiving part 8 comprises one section optical fiber 8a and high-speed photodiode 8b, and this photodiode 8b just produces a reverse voltage when being incorporated into the light of light receiving part 8 by optical fiber 8a receiving.Judge that part 9 comprises an OSC sync comparator 9a, it compares mutually to the positive electrode 5a that is added to electric discharge device 5 and the high-voltage pulse (b) on the interior core conductor 2 with by the pulse (a) that light receiving part 8 is added to the discharge light above it, so that check whether mutually synchronously these two pulses; Judge that part 9 also comprises a determination circuit 9b, it is used for determining that receiving from OSC sync comparator 9a when showing that these two pulses are the nonsynchronous signals phase mutually synchronization or mutual high-tension cable 1 is defective or zero defect.
If in test, from high-tension cable, there is not electric current to leak, then can judge high-voltage pulse (b) and the pulse (a) of the light that discharges is a mutually synchronization mutually, thereby high voltage cable 1 is " zero defect ".If high-tension cable 1 has electric current to leak because pin hole or similar defect are arranged thereon, discharge does not then take place in discharge equipment 5 or produce unsettled discharge.Therefore, can be not synchronous from the pulse (a) and the pulse (b) of photodiode 8b output.That is to say, can judge that high-tension cable 1 is " defectiveness ".
In second method shown in Figure 4, the operator is by being added to a ground rod 10 on the workpiece 1 (high-tension cable), thereby whether high-tension electricity is added to above the workpiece 1 so that have leakage current to leak from workpiece 1 with visual inspection.In other words, if pin hole P is arranged on the workpiece 1, then between ground rod 10 and workpiece 1, can produce the electric leakage light, and, then just can not produce the electric leakage light between them as not having pin hole P above the workpiece 1 thereby not having electric current to leak from workpiece.
First kind of method of testing, i.e. the method for implementing by the automatic decision maker that uses discharge-type, because used three utmost point needle points following point to be arranged as discharge equipment 5:
(1) must change the voltage of discharge equipment in order to adapt to the variation that is added to the voltage on the workpiece 1.For this reason, must by change each about the position with the positive electrode 5a, the negative electrode 5b that adjust three utmost point needle points and the gap length between the floating electrode 5c.Time-consumingly when therefore, testing take a lot of work again.In addition, this device is difficult to the accurately withstand voltage of measuring workpieces 1.
(2) when high pressure is added to workpiece 1, in discharge equipment 5, must provide a long gap P.In this case, in the P of gap, can produce unsettled discharge light.Consequently, though the discharge light is to produce continuously, may not can produce discharge light with normal burst.Will judge the insulation defectiveness of workpiece 1 in this case.
Therefore, be added to voltage on the workpiece 1 on be limited to 25～28 kilovolts.When being higher than 28 kilovolts, just can not use voltage the discharge equipment of forming by three utmost point needle points to carry out the withstand voltage checkout.
(3) because the discharge when using the discharge equipment of being made up of three utmost point needle points is carried out in atmosphere, sparking voltage can have ± 5 kilovolts variation, thereby be unsettled.Therefore, the result of estimation gained is not highly reliable.
(4) owing to discharge is carried out, thereby can produce ozone and strong sound in atmosphere, so around testing, can produce a hostile environment.
In the second approach, whether defectiveness is by observing decision for workpiece 1.Therefore, test result depends on operating personnel's professional skill and experience.So test result is not highly reliable, has such possibility, promptly a defective workpiece is judged as flawless workpiece.
The present invention is from following viewpoint, promptly to get on to solve the aforesaid drawbacks from essence, thereby fundamental purpose of the present invention provides a kind of improved proving installation, it can detect pick-up unit that does not use electric discharge type such as the electric current that workpiece leaked of high-tension cable one class or the visual inspection that uses operating personnel, thereby judges that automatically this workpiece is defective or flawless.
To achieve these goals, the invention provides a kind of voltage-resistant test device, it comprises: a high-voltage generator is used for applying high voltage to the workpiece of a needs mensuration withstand voltage; An earth conductor, it is covered with workpiece with insulating material; A power pack wherein twines the N circle with a lead that earth conductor and ground wire are connected with each other round this power pack; Be connected a resistance on two output terminals of power pack; Be used to detect the detecting device of the voltage that on this resistance, is produced; And a warning device, be used for when the detected voltage of this detecting device is higher than the preset upper limit value or is lower than the predetermined lower limit value, showing that this workpiece is defective.
When workpiece has leakage current, power pack produces the electric current corresponding with this leakage current, from the current flowing resistance of power pack output terminal output so that faint current conversion is become voltage.The voltage that is produced by conversion is detected by detecting device, thereby judges whether defectiveness of this workpiece.
This resistance is preferably used a variable resistor.Preferably increase the number of turns of the lead that twines around power pack.Power pack " seizure " is reliably lived weak current, thereby produces the electric current corresponding to this weak current.
Detecting device is made up of DC digital panel table and the sequencer of receiving digital panel meter.Be higher than the preset upper limit value if be input to the voltage of DC digital panel table, then DC digital panel table is exported a signal to sequencer from its high output terminal, and when voltage was lower than lower limit, it was from its signal of low output terminal output.When receiving signal, the lamp that is connected in the warning device of sequencer is switched on, thereby shows that this workpiece is defective.
If the voltage that is produced by resistance is between higher limit and the lower limit, can judge that then the voltage that is produced is not from leakage current but comes self noise.
According to said structure, when the device that applies high pressure is added to high voltage on the workpiece, if there is electric current to leak from workpiece, then leakage current flows to ground wire from earth conductor through lead.Owing to lead twines round current transformer, power pack just produces and the corresponding electric current of electric leakage.Flow on the resistance by its output terminal of electric current process of power pack generation, thereby faint current transitions is become voltage.This voltage and leakage current are directly proportional and are imported in the digital panel meter of detecting device.Export a signal to sequencer from the high output terminal or its low output terminal of digital panel meter.When high output terminal is input to sequencer to signal, be " defectiveness " with regard to the decidable workpiece, and alarm lamp just is switched on.
As mentioned above, directly and automatically survey the electric current that inspection is leaked from workpiece according to proving installation of the present invention, thereby reliable test result is provided.
In addition, owing to used DC digital panel table as detecting device, this device can prevent the maloperation that causes because of noise.
In addition, this device can overcome the existing variety of issue of conventional voltage-resistant test device that is made of three needle-discharging equipment.And this device can be used in 30 kilovolts or higher high voltage reliably.
These and other purpose of the present invention and characteristics are by following explanation and in conjunction with its preferred embodiment with will become clearer with reference to the accompanying drawings, and identical in the drawings parts all use identical reference number to indicate, among these figure:
Fig. 1 is the calcspar of expression voltage-resistant test device according to an embodiment of the invention;
Fig. 2 is the oscillogram of working condition of forming the digital panel meter of withstand voltage test device according to the present invention;
Fig. 3 is the calcspar of the traditional voltage-resistant test device of expression; And
Fig. 4 is the synoptic diagram that shows the classic method of measuring proof voltage.
Voltage-resistant test device according to one embodiment of the present of invention is described as follows under situation with reference to the accompanying drawings.
Fig. 1 is the calcspar of expression according to voltage-resistant test device of the present invention.Similar with traditional pressure resistant testing device shown in Figure 3, measure in the workpiece 11 of proof voltage at needs, the conductor 11a of workpiece 11 is covered with insulating material 11b, and insulating material 11b then is grounded conductor 12 and surrounds.Like this, if on insulating material 11b, formed pin hole or similar thing, thereby make that leakage current can flow on the earth conductor 12 when electric leakage taking place add electric current on conductor 11a after.
High-voltage generator 13 applies a high voltage to the conductor 11a of workpiece 11.
Earth conductor 12 is connected to the lead 14 that ground wire G gets on twines the N circle round power pack 15 number of turns on demand.
The output terminal 16A and the 16B that are positioned at the out secondary of power pack 15 are connected with DC digital panel table 17 with 18B through lead 18A respectively, and 19 of variable resistors between lead 18A and 18B are connected with this two output terminal.In this case, the weak current that power pack 15 is produced is converted into voltage by variable resistor 19, and this voltage then is imported into DC digital panel table 17.
In digital panel meter 17, compare by voltage and predetermined threshold value voltage that variable resistor 19 is produced, as shown in Figure 2.If voltage surpasses higher limit, then digital panel meter 17 is fed to the sequencer 20 that is connected with digital panel meter 17 from its signal of high output terminal 17a output, and when voltage was lower than lower limit, it was fed to sequencer 20 from prearranged signal of its low output terminal 17b output.Digital panel meter 17 and sequencer 20 are formed a detecting device.In this embodiment, higher limit is defined as+0.04 millivolt, and lower limit is defined as-0.04 millivolt.
When the signal from high output terminal 17a or low output terminal 17b output was input to the sequencer 20, the alarm lamp 21 that is connected with sequencer 20 just was switched on, to show that workpiece 1 is defective.
At test period, the high voltage that is produced by high-voltage generator 13 is added on the workpiece 11.When owing to have pin hole or an analog on insulating material 11b, thereby when insulating material 11b had electric current to leak, leakage current flow to power pack 15 through lead 14, and then flows to ground G.Along with leakage current flows through power pack 15, in power pack 15, produce secondary current according to the number of turns that is wrapped in the lead 14 on the power pack 15.
By increase lead 14 around the number of turns, this faint electric current can be detected reliably by power pack.Lead 14 around the number of turns be to stipulate according to the intensity of leakage current and the ratings of power pack.
The electric current of being exported from the output terminal 16A and the 16B of the out secondary that is positioned at power pack 15 variable resistor 19 of flowing through.The voltage that is produced on variable resistor 19 then is input in the digital panel meter 17 of detecting device.
Being input to the voltage of digital panel meter 17 and preset upper limit value and lower limit compares.If voltage is higher than higher limit, digital panel meter 17 just from its signal of high output terminal 17a output to sequencer 20, and if voltage is lower than lower limit, just the low output terminal 17b from it exports a signal to sequencer 20.
When sequencer 20 was received signal, alarm lamp was just connected, and this just reports that to the operator workpiece 11 is defective.
Thereby do not have the leakage current earth conductor 12 of flowing through if do not have pin hole in insulating material 11b, then the out secondary of power pack 15 just can not produce electric current, but owing to the voltage that exists noise to produce then can be presented on the digital panel meter 17.Be higher than lower limit owing to the voltage that exists noise to produce is lower than higher limit, alarm lamp 20 can not connected.
From top explanation as can be known, in according to voltage-resistant test device of the present invention, power pack detects the electric current that leaks from workpiece.Leakage current is as the voltage that is proportional to the leakage current intensity by resistance and input digit panel table.Workpiece whether defectiveness is judged according to input voltage and predetermined threshold value are compared by digital panel meter.Therefore, this voltage-resistant test device provides test result accurately and reliably.
Particularly, leakage current is the electric current that converts non-direct current with power pack to, and noise is a flip-flop that is included in the leakage current, and it is eliminated by power pack.In addition, used the digital panel meter of direct current as digital panel meter.Therefore, this device can prevent the maloperation that causes because of noise.
Furtherly, this device has overcome the variety of issue of traditional voltage-resistant test device of being made up of three needle-discharging equipment.In other words, the voltage that is added on the conductor of workpiece is the 25-28 kilovolt in traditional voltage-resistant test device, and can measure the workpiece withstand voltage of 30 kilovolts or higher high pressure reliably according to device of the present invention.In addition, thus can regulate the voltage will be added on the workpiece to the test voltage change by high-voltage generator.In addition, undertaken by in atmosphere, discharging, do not produce ozone and the huge sound takes place, thereby the surrounding environment of carrying out the proof voltage test is worsened according to device of the present invention unlike traditional measurement proof voltage method.
Though the present invention has also done complete explanation with reference to the accompanying drawings in conjunction with its preferred embodiment, must be pointed out that also concerning those skilled in the art that, various changes and modification are tangible.Unless there were significant differences, such change and modification should be understood to and also be included in as within the scope of the present invention of defined in the appended claim.
Claims (4)
1. voltage-resistant test device is characterized in that comprising:
A high-voltage generator is used for the workpiece of needs measurement proof voltage is applied high voltage;
An earth conductor, it is covered with this workpiece with insulating material;
A power pack wherein twines the N circle with a lead that earth conductor and ground wire are connected with each other round this power pack;
A resistance that is connected on the power pack output terminal;
A detecting device that is used to detect the voltage that produces on this resistance; And
A warning device is used for showing that this workpiece is defective when being higher than a preset upper limit value by the detected voltage of detecting device and being lower than a predetermined lower limit value.
2. according to the voltage-resistant test device of claim 1, it is characterized in that, wherein use a variable resistor as this resistance.
3. according to the voltage-resistant test device of claim 1, it is characterized in that detecting device wherein is made up of with a sequencer that is connected with digital panel meter a DC digital panel table; This DC digital panel table compares mutually to being input to voltage on the table and preset upper limit and lower limit, if just export a signal to sequencer when voltage is higher than higher limit, and when voltage is lower than lower limit, just export a signal to sequencer from its low output terminal from its high output terminal; When signal when high output terminal is input to sequencer, the lamp that is connected on the warning device of this sequencer just is switched on.
4. according to the voltage-resistant test device of claim 2, it is characterized in that: detecting device wherein is made up of a DC digital panel table and the sequencer of receiving digital panel meter; This DC digital panel table compares mutually to its input voltage and preset upper limit and lower limit, when if this voltage is higher than higher limit just from its signal of high output terminal output to sequencer, if just export a signal to sequencer when this voltage is lower than lower limit from its low output terminal; When signal when high output terminal is input to sequencer, the lamp that is connected on the warning device of this sequencer just is switched on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95105475 CN1135607A (en) | 1995-05-09 | 1995-05-09 | Voltage-resistant test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95105475 CN1135607A (en) | 1995-05-09 | 1995-05-09 | Voltage-resistant test device |
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| Publication Number | Publication Date |
|---|---|
| CN1135607A true CN1135607A (en) | 1996-11-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95105475 Pending CN1135607A (en) | 1995-05-09 | 1995-05-09 | Voltage-resistant test device |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101551302B (en) * | 2009-05-13 | 2011-05-11 | 株洲湘火炬火花塞有限责任公司 | Tester for testing ignition capability and voltage resistant capability of sparking plug and testing method and uses |
| CN101329384B (en) * | 2007-06-22 | 2011-12-14 | 日本特殊陶业株式会社 | Method and apparatus for testing spark plug insulator |
| CN102455401A (en) * | 2010-10-20 | 2012-05-16 | 鹤岗电业局 | Device for improving test efficiency of capacitive current transformer |
| CN101762776B (en) * | 2009-11-30 | 2013-01-30 | 福建星网锐捷网络有限公司 | Method and device for testing voltage withstanding degree of port |
| CN107422230A (en) * | 2017-05-31 | 2017-12-01 | 芜湖博康机电有限公司 | A kind of wire harness proof voltage detection means |
| CN107664738A (en) * | 2016-07-27 | 2018-02-06 | Ls电线有限公司 | Soft bus voltage-resistant test device |
| CN109581156A (en) * | 2018-11-12 | 2019-04-05 | 国网天津市电力公司电力科学研究院 | A kind of high-voltage mutual inductor pressure test method for semi-automatically detecting |
| CN111855759A (en) * | 2019-04-25 | 2020-10-30 | 住友化学株式会社 | Method for manufacturing separator and apparatus for manufacturing separator |
-
1995
- 1995-05-09 CN CN 95105475 patent/CN1135607A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101329384B (en) * | 2007-06-22 | 2011-12-14 | 日本特殊陶业株式会社 | Method and apparatus for testing spark plug insulator |
| CN101551302B (en) * | 2009-05-13 | 2011-05-11 | 株洲湘火炬火花塞有限责任公司 | Tester for testing ignition capability and voltage resistant capability of sparking plug and testing method and uses |
| CN101762776B (en) * | 2009-11-30 | 2013-01-30 | 福建星网锐捷网络有限公司 | Method and device for testing voltage withstanding degree of port |
| CN102455401A (en) * | 2010-10-20 | 2012-05-16 | 鹤岗电业局 | Device for improving test efficiency of capacitive current transformer |
| CN107664738A (en) * | 2016-07-27 | 2018-02-06 | Ls电线有限公司 | Soft bus voltage-resistant test device |
| CN107422230A (en) * | 2017-05-31 | 2017-12-01 | 芜湖博康机电有限公司 | A kind of wire harness proof voltage detection means |
| CN109581156A (en) * | 2018-11-12 | 2019-04-05 | 国网天津市电力公司电力科学研究院 | A kind of high-voltage mutual inductor pressure test method for semi-automatically detecting |
| CN111855759A (en) * | 2019-04-25 | 2020-10-30 | 住友化学株式会社 | Method for manufacturing separator and apparatus for manufacturing separator |
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