CN108008272A - A kind of design circuit realized lightning surge and insulation voltage-withstand test while passed through - Google Patents
A kind of design circuit realized lightning surge and insulation voltage-withstand test while passed through Download PDFInfo
- Publication number
- CN108008272A CN108008272A CN201711454770.3A CN201711454770A CN108008272A CN 108008272 A CN108008272 A CN 108008272A CN 201711454770 A CN201711454770 A CN 201711454770A CN 108008272 A CN108008272 A CN 108008272A
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- voltage
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- pin
- circuit
- discharge tube
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/14—Circuits therefor, e.g. for generating test voltages, sensing circuits
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/36—Overload-protection arrangements or circuits for electric measuring instruments
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
Abstract
The invention discloses a kind of design circuit for realizing lightning surge and the voltage-withstand test that insulate passes through at the same time, which includes varistor, gas-discharge tube, relay, capacitance, common mode inductance, isolating diode, fuse, Switching Power Supply modular converter (model：URF1D12QB 75W) etc. device.Compared to the prior art, the present invention is on the basis of based on the existing common surge restraint circuit for employing gas discharge tube device, compensate for, since the conducting voltage of gas-discharge tube is relatively low, causing cannot standard pressure-resistant by AC1500V in the voltage-withstand test that insulate the problem of.Equipment is set to meet lightning surge test and insulation voltage-withstand test at the same time.
Description
Technical field
The present invention relates to a kind of design circuit for realizing lightning surge and the voltage-withstand test that insulate passes through at the same time.
Background technology
As client is for the safety of product and the attention of antijamming capability, now for the safety requirement of product and anti-thunder
The requirement for hitting the protective capacities such as surge is continuously improved.This requires product with more outstanding EMC designs, for power unit
It is required that there is more preferable protection circuit.But existing designing scheme, generally gas discharge is all used in lightning surge protection circuit
Pipe is released, not so high in order to suppress the surge voltage of rear class when selecting the turn-on parameter of gas-discharge tube, just necessary
Select the slightly lower gas-discharge tube of conducting voltage.This creates the terminal product when doing the insulation voltage-withstand test of safety, power supply with
Pressure voltage between ground is inadequate.
The utility model patent of Application No. 201621298849.2, discloses a kind of protection circuit of lightning surge, can
The lightning surge voltage of power end is put on effective protection, the drawback is that it is weaker for common mode surge interference prevention, do not have
Have clearly for the pressure-resistant degree of protection that insulate.
The content of the invention
For problems of the prior art, realize lightning surge it is an object of the invention to provide one kind and insulate resistance to
The design circuit that pressure test passes through at the same time, it efficiently solves problems of the prior art.
To achieve the above object, the present invention uses following technical scheme：
A kind of design circuit realized lightning surge and insulation voltage-withstand test while passed through, the design circuit include insurance
Silk F1, one end of the fuse F1 and the end L connections of input power, the other end of fuse F1 and the one of varistor RV1
End, the first pin connection of one end of varistor RV2 and common mode inductance L1, the other end of the varistor RV1 with it is defeated
Enter the end N connections of power supply, the other end of the varistor RV2 and one end of varistor RV3 and gas-discharge tube GDT1
One end connection, the 3rd pin of the other end of the varistor RV3 and the end N of the input power and common mode inductance L1
Connection, the second pin of common mode inductance L1 are connected with the anode of diode D1, the cathode of the diode D1 and the one of capacitance C1
End, the first pin connection of one end of capacitance C3, one end of capacitance C4 and on-off circuit U1, the other end of the capacitance C1 with
Connect one end of capacitance C2 and casing；The other end of the capacitance C2, the other end of capacitance C3 and capacitance C4 it is another
The 3rd pin, the 4th pin of common mode inductance L1 with the on-off circuit U1 is held to be connected；The gas-discharge tube GDT1's
The other end is connected with the one end switched in relay, and the other end switched in the relay is connected with casing, in relay
The both ends of coil connect the cathode and ground of output voltage respectively；The 7th pin of on-off circuit U1 and the 8th pin link together work
For the cathode of output voltage, the 4th pin of on-off circuit U1 and the 5th pin are connected together as the anode of output voltage.
The present invention has following advantageous effects：
Compared to the prior art, the present invention is based on the existing common Surge suppression electricity for employing gas discharge tube device
On the basis of road, it compensate for since the conducting voltage of gas-discharge tube is relatively low, causing cannot be by the voltage-withstand test that insulate
The problem of standard that AC1500V is pressure-resistant.Equipment is set to meet lightning surge test and insulation voltage-withstand test at the same time.
Brief description of the drawings
Fig. 1 is the circuit diagram of the present invention.
Embodiment
In the following, refer to the attached drawing, more fully illustrates the present invention, shown in the drawings of the exemplary implementation of the present invention
Example.However, the present invention can be presented as a variety of multi-forms, it is not construed as being confined to the exemplary implementation described here
Example.And these embodiments are to provide, so that the present invention is fully and completely, and it will fully convey the scope of the invention to this
The those of ordinary skill in field.
As shown in Figure 1, the present invention provides a kind of design electricity for realizing lightning surge and the voltage-withstand test that insulate passes through at the same time
Road, the design circuit include fuse F1, one end of fuse F1 and the end L connections of input power, the other end of fuse F1
One end of one end, varistor RV2 and the first pin of common mode inductance L1 with varistor RV1 are connected, varistor RV1
The other end and input power end N connections, the other end and one end of varistor RV3 and gas of varistor RV2 are put
One end connection of fulgurite GDT1, the other end and the end N of input power and the 3rd pin of common mode inductance L1 of varistor RV3
Connection, the second pin of common mode inductance L1 are connected with the anode of diode D1, the cathode of diode D1 and one end of capacitance C1, electricity
Hold the first pin connection of one end of C3, one end of capacitance C4 and on-off circuit U1, the other end of capacitance C1 is with capacitance C2's
Connect one end and casing；The other end of the other end of capacitance C2, the other end of capacitance C3 and capacitance C4 is electric with switch
Road U1 (models：URF1D12QB-75W the 4th pin connection of the 3rd pin, common mode inductance L1)；Gas-discharge tube GDT1's
The other end is connected with the one end switched in relay, and the other end switched in relay is connected with casing, relay coil
Both ends connect the cathode of output voltage and ground respectively；The 7th pin of on-off circuit U1 and the 8th pin are connected together as defeated
Go out the cathode of voltage, the 4th pin of on-off circuit U1 and the 5th pin are connected together as the anode of output voltage.
In the application lightning surge guard section using varistor RV1 carry out differential mode protection, varistor RV2, RV3,
The device such as gas-discharge tube GDT1, common mode inductance L1, Y capacitance C1, C2, X capacitance C3 carries out common mode protection, and U1 is Switching Power Supply mould
Block.Varistor is a kind of votage limit type protection device, using the nonlinear characteristic of varistor, when overvoltage appears in pressure-sensitive electricity
Two interpolars of resistance, varistor can be by voltage clamping to a relatively-stationary magnitude of voltage, so as to fulfill to late-class circuit
Protection.Since input voltage is+66VDC--+160VDC, the varistor device of 201KD15 models can be selected, its maximum is held
It is+170VDC by voltage, pressure sensitive voltage scope is+180VDC--+220VDC, and maximum clamp voltage is 340V, be can be very good
Carry out the protection of differential mode surge voltage., it is necessary to which considering to select includes gas-discharge tube progress common mode in terms of common-mode voltage protection
Surge current is released.Gas-discharge tube is a kind of switching mode protection device, and operation principle is gas discharge.When two voltage across poles
When sufficiently large, discharge breakdown reduces the voltage that two interpolars maintain by two pole clearances, so as to play the effect of protection late-class circuit
Fruit.For relatively good carry out common mode protection, make the residual voltage into rear class sufficiently small, be unlikely to produce ratio to late-class circuit
Larger impact, the gas-discharge tube model 2RL1000L-8 selected here, its dc breakdown voltage are 1000 ± 20%V,
Impact flashover voltage is 1400V, can protect the residual voltage of late-class circuit at one than on relatively low magnitude of voltage, rear class uses again
The design of common mode inductance and Y capacitance, the protection of completion common mode surge voltage that can be relatively good.General such design can
Testing for lightning surge 4 grades of standards (differential mode ± 2KV, common mode ± 4KV) is completed well.But just generate one here to ask
Topic, since the breakdown voltage value of gas-discharge tube is than relatively low, when carrying out safety insulation voltage-withstand test to this power circuit, in L/N
When adding ac high-voltage to PE ends, the breakdown voltage of gas-discharge tube is about in 1000*80%/1.414=565V at this time, about
When test voltage is raised to more than 560V, gas-discharge tube just punctures, and causes the leakage current of L/N ends over the ground drastically to rise
Height, far can not meet the requirement of leakage current≤10mA during the AC1500V of voltage-withstand test.To complete voltage-withstand test AC1500V
When leakage current≤10mA requirement, it would be desirable to it is about 1500*1.414/0.8=2650V to select a dc breakdown voltage
Gas-discharge tube can just meet the requirements.That is we at least need to select the breakdown voltage of 2RH2700L-8 or bigger
The gas-discharge tube of value is.And at this time before gas-discharge tube comes into force conducting, the surge voltage for having had minimum 2650V is rushed
Back-end circuit is hit, it is difficult that protection arrives this that the circuit and switch power module of general rear class common mode inductance and Y capacitance composition, which are,
High surge voltage, so easilying lead to switch power module failure or the damage of rear class.
In order to solve lightning surge and the pressure-resistant conflicting test request that insulate in general test, can use sometimes
When carrying out insulation voltage-withstand test gas-discharge tube is removed, meet pressure-resistant requirement of insulating in this way.But for this
Change circuit or device kind during the test to meet the method for test request, now stringenter mechanism for testing is not
Allow to employ during the test.In order to solve the test request of this contradiction, product circuit or device can not changed
In the case of, while by lightning surge and the pressure-resistant test of insulating, the application increases between PE in gas-discharge tube and casing
Add a relay.The output voltage of the switch power module of the supply voltage selected as rear class of relay, two contact difference
With connecting gas-discharge tube and casing PE.When carrying out lightning surge test, system power-up, switch power module output voltage,
Relay coil both ends making alive, two contacts, which are attracted, to link together, and PE is turned on making gas-discharge tube and casing.When in L/
When applying surge voltage between PE, surge current is released to casing on the ground by gas-discharge tube and relay, protects N and casing
The voltage of late-class circuit is demonstrate,proved in the scope of a safety.When equipment carries out insulation voltage-withstand test, at this moment since equipment is in
In the state of not powered, switch power module does not work, and relay coil both ends no-voltage, then the two of relay contact will not
Action, with making gas-discharge tube and casing in breaking state between PE.In order to bear in pressure test, L/N to PE it
Between the 1500VAC voltages that apply, that is, the 1500VAC being applied between two contacts of relay, it is desirable to during selective relay model,
Ensure that the dielectric withstanding voltage value between two contact of relay is greater than equal to 1500VAC, at this moment, just can guarantee that between two contacts will not be by
Discharge conducting in overtension.In the specifications that may be referred to selected relay, medium between two contacts of performance parameter part
Pressure voltage makes choice.Meanwhile the bigger model of load current magnitude of voltage for the selective relay that should try one's best.
Through actual test, the present invention can effectively and reliably realize that power supply circuit meets 4 grades of marks of lightning surge at the same time
Quasi- test (differential mode ± 2KV, common mode ± 4KV), and meet the test request of pressure-resistant AC1500V in safety test, greatly improve
The overall security and practicality of product.And hardware cost is low, small, global design is simple in structure, and securely and reliably.
It is described above simply to illustrate that of the invention, it is understood that the invention is not limited in above example, meets
The various variants of inventive concept are within protection scope of the present invention.
Claims (1)
- A kind of 1. design circuit realized lightning surge and insulation voltage-withstand test while passed through, it is characterised in that the design electricity Road includes fuse (F1), one end of the fuse (F1) and the end L connections of input power, the other end of fuse (F1) with The first pin connection of one end of varistor (RV1), one end of varistor (RV2) and common mode inductance (L1), the pressure The end N connections of the other end and input power of quick resistance (RV1), the other end and varistor of the varistor (RV2) (RV3) one end and one end connection of gas-discharge tube (GDT1), the other end and input power of the varistor (RV3) End N and the common mode inductance (L1) the connection of the 3rd pin, the second pin of common mode inductance (L1) and diode (D1) Anode connects, one end of the cathode of the diode (D1) and one end of capacitance (C1), one end of capacitance (C3), capacitance (C4) with And the first pin connection of on-off circuit (U1), the other end of the capacitance (C1) connect with one end of capacitance (C2) and casing Connect；The other end of the other end of the capacitance (C2), the other end of capacitance (C3) and capacitance (C4) with the on-off circuit (U1) the 4th pin connection of the 3rd pin, common mode inductance (L1)；The other end and relay of the gas-discharge tube (GDT1) The one end switched in device connects, and the other end switched in the relay is connected with casing, the both ends point of relay coil The cathode and ground of output voltage are not connect；The 7th pin and the 8th pin of on-off circuit (U1) are connected together as output voltage Cathode, the 4th pin and the 5th pin of on-off circuit (U1) are connected together as the anode of output voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711454770.3A CN108008272A (en) | 2017-12-28 | 2017-12-28 | A kind of design circuit realized lightning surge and insulation voltage-withstand test while passed through |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711454770.3A CN108008272A (en) | 2017-12-28 | 2017-12-28 | A kind of design circuit realized lightning surge and insulation voltage-withstand test while passed through |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108008272A true CN108008272A (en) | 2018-05-08 |
Family
ID=62062054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711454770.3A Withdrawn CN108008272A (en) | 2017-12-28 | 2017-12-28 | A kind of design circuit realized lightning surge and insulation voltage-withstand test while passed through |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108008272A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109274275A (en) * | 2018-09-30 | 2019-01-25 | 中国电力科学研究院有限公司 | A kind of device and method taking energy in transmission line of electricity hot end |
| CN109600035A (en) * | 2018-12-20 | 2019-04-09 | 郑州云海信息技术有限公司 | A kind of power module |
| CN110445112A (en) * | 2019-08-07 | 2019-11-12 | 威海精讯畅通电子科技有限公司 | A kind of surge processing circuit and surge processing unit |
| CN113078025A (en) * | 2021-03-19 | 2021-07-06 | 苏州贝昂科技有限公司 | Gear switching circuit |
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| JPH05199737A (en) * | 1992-01-16 | 1993-08-06 | Ricoh Co Ltd | Power-supply device for alternating current input |
| JPH10253695A (en) * | 1997-03-14 | 1998-09-25 | Kokusai Electric Co Ltd | Apparatus for simplification of withstand voltage test |
| KR20080105293A (en) * | 2007-05-30 | 2008-12-04 | 선린전자 주식회사 | Protective apparatus against a stroke of lightingand surge of power line |
| CN201974448U (en) * | 2010-12-10 | 2011-09-14 | 广东雅达电子股份有限公司 | Surge-prevention intelligent electrical measuring instrument |
| JP2013068514A (en) * | 2011-09-22 | 2013-04-18 | Mitsubishi Electric Corp | Electronic apparatus |
| CN203086135U (en) * | 2013-01-17 | 2013-07-24 | 深圳市赛盛技术有限公司 | Industrial switch direct current power supply port protection circuit |
| CN204068243U (en) * | 2014-07-14 | 2014-12-31 | 武汉迈威光电技术有限公司 | A kind of industrial ethernet switch DC power supply surge protective circuit |
| CN205622198U (en) * | 2016-04-20 | 2016-10-05 | 北京泛华新兴体育产业股份有限公司 | Display screen with lightning protection function |
| JP2017013547A (en) * | 2015-06-29 | 2017-01-19 | 東日本旅客鉄道株式会社 | Ground fault protection device and ground fault protection system |
| CN206259703U (en) * | 2016-11-29 | 2017-06-16 | 广东雄粤防雷工程有限公司 | A kind of anti-lightning strike pulser |
| CN107342580A (en) * | 2016-12-23 | 2017-11-10 | 深圳市深波电子有限公司 | A kind of Anti-surging automatic control protecting device |
-
2017
- 2017-12-28 CN CN201711454770.3A patent/CN108008272A/en not_active Withdrawn
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|---|---|---|---|---|
| JPH05199737A (en) * | 1992-01-16 | 1993-08-06 | Ricoh Co Ltd | Power-supply device for alternating current input |
| JPH10253695A (en) * | 1997-03-14 | 1998-09-25 | Kokusai Electric Co Ltd | Apparatus for simplification of withstand voltage test |
| KR20080105293A (en) * | 2007-05-30 | 2008-12-04 | 선린전자 주식회사 | Protective apparatus against a stroke of lightingand surge of power line |
| CN201974448U (en) * | 2010-12-10 | 2011-09-14 | 广东雅达电子股份有限公司 | Surge-prevention intelligent electrical measuring instrument |
| JP2013068514A (en) * | 2011-09-22 | 2013-04-18 | Mitsubishi Electric Corp | Electronic apparatus |
| CN203086135U (en) * | 2013-01-17 | 2013-07-24 | 深圳市赛盛技术有限公司 | Industrial switch direct current power supply port protection circuit |
| CN204068243U (en) * | 2014-07-14 | 2014-12-31 | 武汉迈威光电技术有限公司 | A kind of industrial ethernet switch DC power supply surge protective circuit |
| JP2017013547A (en) * | 2015-06-29 | 2017-01-19 | 東日本旅客鉄道株式会社 | Ground fault protection device and ground fault protection system |
| CN205622198U (en) * | 2016-04-20 | 2016-10-05 | 北京泛华新兴体育产业股份有限公司 | Display screen with lightning protection function |
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| CN107342580A (en) * | 2016-12-23 | 2017-11-10 | 深圳市深波电子有限公司 | A kind of Anti-surging automatic control protecting device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109274275A (en) * | 2018-09-30 | 2019-01-25 | 中国电力科学研究院有限公司 | A kind of device and method taking energy in transmission line of electricity hot end |
| CN109600035A (en) * | 2018-12-20 | 2019-04-09 | 郑州云海信息技术有限公司 | A kind of power module |
| CN110445112A (en) * | 2019-08-07 | 2019-11-12 | 威海精讯畅通电子科技有限公司 | A kind of surge processing circuit and surge processing unit |
| CN113078025A (en) * | 2021-03-19 | 2021-07-06 | 苏州贝昂科技有限公司 | Gear switching circuit |
| CN113078025B (en) * | 2021-03-19 | 2022-04-29 | 苏州贝昂科技有限公司 | Gear switching circuit |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180508 |
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| WW01 | Invention patent application withdrawn after publication |