CN2672666Y - Detecting circuit for anti surge property - Google Patents
Detecting circuit for anti surge property Download PDFInfo
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- CN2672666Y CN2672666Y CN 200320126088 CN200320126088U CN2672666Y CN 2672666 Y CN2672666 Y CN 2672666Y CN 200320126088 CN200320126088 CN 200320126088 CN 200320126088 U CN200320126088 U CN 200320126088U CN 2672666 Y CN2672666 Y CN 2672666Y
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Abstract
The utility model discloses a detecting circuit for anti surge property, comprising an impulse current generator, a coupling network, a detecting apparatus and a decoupling network. The impulse current generator is provided with output ports A and B to generate an impulse current, and the coupling network is connected with the impulse current generator through the output ports A and B of the impulse current generator. The detecting apparatus comprises the power supply of the detecting apparatus, and three lines are connected with the power supply of the detecting apparatus, i.e., L line, N line and PE line. The coupling network is connected with the power supply of the detecting apparatus through the three lines. The decoupling network is parallelly connected between the L line and the N line, and the power supply of the detecting apparatus is input after being passed through the decoupling network. Wherein, the coupling network comprises a voltage-sensitive resistor unit serially connected on the L line and another voltage-sensitive resistor unit serially connected on the N line. Additionally, the L line and the N line are connected with the A port of the output terminal of the impulse current generator, and the PE line is connected with the B port of the output terminal of the impulse current generator.
Description
Technical field
The utility model relates to the measuring technology of the electronics and the communications field, is specifically related to a kind of antisurge performance test circuit.
Background technology
In the process of electronic equipment or communication facilities, the situation that has curtage to increase suddenly usually, promptly so-called surge.Because surge can exert an influence or make the performance of electronic equipment or communication system to reduce usually to the normal stable operation of electronic equipment or communication system; so in the electronics and the communications field; can under the situation that surge occurs, can normally stably work for assurance equipment, all need the port of unit, system is carried out the design of port surge protection circuit and carries out the antisurge performance test.
In general, the antisurge performance test is divided into differential mode test and common mode test, and so-called differential mode test promptly is that online (such as between L-live wire and N-zero line) applies surge, and with the antisurge performance of test equipment, this mode is less in actual applications; The common mode test promptly is over the ground (at L line+N line and ground wire (Protect Earth line: apply surge the PE line) at two-wire, with testing apparatus antisurge performance, concrete networking as shown in Figure 1, consider that common impulse current generator only has two lead-out terminals, and the common mode test is subjected to examination equipment that three input terminals are arranged, so the time must use coupling network to being subjected to examination equipment to carry out the common mode test, this coupling network can be sent to another loop from a loop with energy, and effect has following 3 points: 1, do not influence dash current and apply surge to being subjected to examination equipment; 2, can not make and short circuit occurs to L line that is tried the power devices power supply and N line; 3, coupling network self can satisfy the carrying dash current flow through, be not damaged.
In the common mode test of prior art, because of the common common mode testing scheme of the difference of coupling network has following two kinds:
Scheme one, capacitive coupling scheme, specifically with reference to figure 2, visible coupling network is to constitute by being connected on an electric capacity on the L line and another electric capacity that is connected on the N line.Wherein, the L line all is to link to each other with the A terminal of impulse current generator lead-out terminal with the N line, and the PE line then links to each other with the B terminal of impulse current generator lead-out terminal.Because electric capacity has the characteristic of logical high frequency resistance low frequency, so adopt capacitive coupling scheme one side electric capacity can guarantee that carrying dash current flows through, guarantee that on the other hand the 220V power supply is normal, be not short-circuited, can satisfy the impulse current test requirement of little magnitude.But but there is following shortcoming in this kind scheme:
1, owing to needs to carry that dash current flows through and electric capacity is to rely on charge/discharge to realize the carrying high-frequency current on the electric capacity, so when big magnitude dash current flows through electric capacity, electric capacity can be because charging be created in high pressure on the electric capacity, and then cause when this scheme of employing, need selecting 10KV or higher electric capacity, and this electric capacity has the shortcoming that volume is big, price is high.
2, since electric capacity be subjected to examination equipment to become the load of impulse current generator, so very big variation has taken place the impedance operator parameter in whole loop, the output waveform of impulse current generator will distort, and run counter to the purpose of design of coupling network.
Scheme two, gap coupling scheme, specifically with reference to figure 3, the distinctive points of this kind scheme and scheme one only is the electric capacity in the scheme one has been replaced to the gap.Because the gap has the characteristic of logical high pressure drag low pressure, is in the shutoff open-circuit condition in the time of low pressure, in the time of high pressure, be in puncture conducting short-circuit condition.So the carrying dash current flow through when this kind scheme can guarantee to apply impact on the one hand, guaranteed that on the other hand the gap stray capacitance is very little under the normal condition, can not produce leakage current, can satisfy the dash current test request of signal port.But still there is following shortcoming in this scheme:
When 1, carrying the impulse current test of big magnitude, because the gap belongs to the very fast type device of performance degradation speed, so need to change the gap by the gap.
2, because in the power port impulse current test, the gap turn-on action satisfies the carrying dash current and flows through; When impulse current generator stops to export, this moment is because 220V AC power (perhaps other direct supplys) still is applied to the two ends, gap, this voltage is enough to make the gap to keep conducting afterflow state, to occur the short circuit of supply network or power supply like this, and potential safety hazard occur and cause test to be interrupted.So this scheme coupling network can not be applicable to the test of power port dash current.
Summary of the invention
The utility model provides a kind of antisurge performance test circuit, can not be simultaneously not only be applicable to most of port tests but also the low problem of cost to solve prior art.
For addressing the above problem, the utility model provides following technical scheme:
A kind of antisurge performance test circuit comprises: impulse current generator, output port A and B are arranged, and act as the generation dash current; Coupling network, described coupling network links to each other with impact circuit flow generator by the output port A and the B of described impulse current generator; Be subjected to examination equipment, it includes and is tried device power supply (DPS), and insert this and tried device power supply (DPS) three lines are arranged, that is: L line, N line and PE line, described coupling network links to each other with the described power-supply device that tried by described three lines; Decoupling network, described decoupling network is connected in parallel between L line and N line, the power supply input that is tried equipment is by just input behind the decoupling network, the effect of described decoupling network is to prevent to be applied to the shock effect that is subjected on the examination equipment to give to other and tried the supply network of power devices or the circuit of power supply, wherein, described coupling network is made of another voltage dependent resistor (VDR) group that is connected on the voltage dependent resistor (VDR) group on the L line and be connected on the N line, in addition, the L line all is to link to each other with the A port of impulse current generator lead-out terminal with the N line, and the PE line then links to each other with the B port of impulse current generator lead-out terminal.
Voltage dependent resistor (VDR) group on the described L of the being connected on line can be a voltage dependent resistor (VDR) or at least two voltage dependent resistor (VDR)s that are together in series or at least two voltage dependent resistor (VDR)s being together in parallel.
Another voltage dependent resistor (VDR) group on the described N of the being connected on line can be a voltage dependent resistor (VDR) or at least two voltage dependent resistor (VDR)s that are together in series or at least two voltage dependent resistor (VDR)s being together in parallel.
Voltage dependent resistor (VDR) group on the described L of the being connected on line also is in series with the gap respectively with the front that is connected on another voltage dependent resistor (VDR) group on the N line.
Voltage dependent resistor (VDR) group on the described L of the being connected on line and be connected on another voltage dependent resistor (VDR) group on the N line and also be parallel with electric capacity respectively.
After adopting above-mentioned technical scheme, the utlity model has following advantage:
1, adopt this Scheme Choice voltage dependent resistor (VDR) to satisfy can to carry repeatedly that the maximum impact electric current flows through, satisfy the voltage dependent resistor (VDR) that the dash current of the big magnitude of carrying flows through usually, volume ratio is less, and price comparison is low, can satisfy the low requirement of scheme cost.
2, by choosing the higher voltage dependent resistor (VDR) of through-current capability magnitude, make the voltage dependent resistor (VDR) replacement cycle very long;
3, adopt this scheme, do not have the potential faults of similar gap afterflow, the reliability height;
4, adopt this scheme,,, guarantee measuring accuracy, and under the static state, be in high resistant, satisfy being subjected to the requirement that normally powers on of examination equipment so do not influence the impulse current generator output waveform substantially because voltage dependent resistor (VDR) is in low resistive state in the time of the bleed off dash current.
Description of drawings
The position view of coupling network in the existing common mode test of Fig. 1;
Fig. 2 is the circuit diagram of existing capacitive coupling scheme;
Fig. 3 is the circuit diagram of existing gap coupling scheme;
Fig. 4 is the circuit diagram of the utility model antisurge performance test circuit;
Fig. 5 is the second embodiment circuit diagram of the present utility model;
Fig. 6 is the 3rd an embodiment circuit diagram of the present utility model.
Embodiment
Please refer to Fig. 4, the antisurge performance test circuit for the utility model provides comprises: impulse current generator, output port A and B are arranged, and act as the generation dash current; Coupling network, described coupling network links to each other with impact circuit flow generator by the output port A and the B of described impulse current generator; Be subjected to examination equipment, it includes and is tried device power supply (DPS), and insert this and tried device power supply (DPS) three lines are arranged, that is: L line, N line and PE line, described coupling network links to each other with the described power-supply device that tried by described three lines; Decoupling network, described decoupling network is connected in parallel between L line and N line, the power supply input that is tried equipment is by just input behind the decoupling network, the effect of described decoupling network be prevent to be applied to the shock effect that is subjected on the examination equipment to other to being tried the supply network of power devices or the circuit of power supply.
Wherein, described coupling network constitutes by being connected on a voltage dependent resistor (VDR) on the L line and another voltage dependent resistor (VDR) that is connected on the N line.Wherein, the L line all is to link to each other with the A terminal of impulse current generator lead-out terminal with the N line, and the PE line then links to each other with the B terminal of impulse current generator lead-out terminal.
Because voltage dependent resistor (VDR) has the characteristic of logical high pressure, resistance low pressure, described voltage dependent resistor (VDR) is in high-impedance state when low pressure, even up to 100M ohmage magnitude; Be in clamped guard mode in the time of high pressure, voltage slowly rises with the increase of electric current, and the resistance of the voltage dependent resistor (VDR) when clamped guard mode only is several ohms even littler.So the carrying dash current flow through when voltage dependent resistor (VDR) can guarantee to apply dash current on the one hand, can be tried under the equipment normal condition in assurance on the other hand, leakage current between L line and N line only is to individual microampere even littler, can satisfy the power port dash current test request of big magnitude.
In addition, in the described coupling network, can be connected on two or more voltage dependent resistor (VDR)s on the L line or on the N line, also can be connected in parallel on two or more voltage dependent resistor (VDR)s on the L line or on the N line; Described coupling network also can be applicable in the three-phase system, three L lines are arranged in three-phase system,, a N line and a PE line, promptly respectively after the one or more voltage dependent resistor (VDR)s of series connection on three L lines and the N line, three L lines and N line are linked to each other with the output port A of impulse current generator, the PE line is linked to each other with the output port B of impulse current generator.Similarly, in the time of in being applied to three-phase system, also two or more voltage dependent resistor (VDR)s can be connected on the every L line or on the N line, also two or more voltage dependent resistor (VDR)s can be connected in parallel on the every L line or on the N line.
After adopting above-mentioned technical scheme, the utlity model has following advantage:
1, adopt this Scheme Choice voltage dependent resistor (VDR) to satisfy can to carry repeatedly that the maximum impact electric current flows through, satisfy the voltage dependent resistor (VDR) that the dash current of the big magnitude of carrying flows through usually, volume ratio is less, and price comparison is low, can satisfy the low requirement of scheme cost.
2, by choosing the higher voltage dependent resistor (VDR) of through-current capability magnitude, make the voltage dependent resistor (VDR) replacement cycle very long;
3, adopt this scheme, do not have the potential faults of similar gap afterflow, the reliability height;
4, adopt this scheme,,, guarantee measuring accuracy, and under the static state, be in high resistant, satisfy being subjected to the requirement that normally powers on of examination equipment so do not influence the impulse current generator output waveform substantially because voltage dependent resistor (VDR) is in low resistive state in the time of the bleed off dash current.
Please refer to Fig. 5, be second embodiment of the present utility model, this embodiment compares with scheme two in the prior art, and distinctive points is in voltage dependent resistor (VDR) of each back, gap series connection.
Please refer to Fig. 6, be the 3rd embodiment of the present utility model, this embodiment compares with scheme one in the prior art, and distinctive points is voltage dependent resistor (VDR) in parallel on each electric capacity.
Claims (7)
1, a kind of antisurge performance test circuit comprises: impulse current generator, output port A and B are arranged, and act as the generation dash current; Coupling network, described coupling network links to each other with impact circuit flow generator by the output port A and the B of described impulse current generator; Be subjected to examination equipment, it includes and is tried device power supply (DPS), inserts this and is tried device power supply (DPS) live wire (L line), zero line (N line) and three lines of ground wire (PE line) are arranged, and described coupling network links to each other with the described power-supply device that tried by described three lines; Decoupling network, described decoupling network is connected in parallel between L line and N line, the power supply input that is tried equipment is by just input behind the decoupling network, the effect of described decoupling network be prevent to be applied to the shock effect that is subjected on the examination equipment to other to being tried the supply network of power devices or the circuit of power supply; It is characterized in that, described coupling network is made of another voltage dependent resistor (VDR) group that is connected on the voltage dependent resistor (VDR) group on the L line and be connected on the N line, in addition, the L line all is to link to each other with the A port of impulse current generator lead-out terminal with the N line, and the PE line then links to each other with the B port of impulse current generator lead-out terminal.
2, circuit as claimed in claim 1 is characterized in that: at least two voltage dependent resistor (VDR)s that are connected on voltage dependent resistor (VDR) group on the L line and can are a voltage dependent resistor (VDR) or at least two voltage dependent resistor (VDR)s that are together in series or be together in parallel.
3, circuit as claimed in claim 1 is characterized in that, at least two voltage dependent resistor (VDR)s that are connected on another voltage dependent resistor (VDR) group on the N line and can are a voltage dependent resistor (VDR) or at least two voltage dependent resistor (VDR)s that are together in series or be together in parallel.
4, circuit as claimed in claim 1 is characterized in that, the voltage dependent resistor (VDR) group that is connected on the L line also is in series with the gap respectively with the front that is connected on another voltage dependent resistor (VDR) group on the N line.
5, circuit as claimed in claim 4, it is characterized in that the voltage dependent resistor (VDR) group on the described L of the being connected on line and to be connected on another voltage dependent resistor (VDR) group on the N line can be a voltage dependent resistor (VDR) or at least two voltage dependent resistor (VDR)s that are together in series or at least two voltage dependent resistor (VDR)s being together in parallel.
6, circuit as claimed in claim 1 is characterized in that, is connected on the voltage dependent resistor (VDR) group on the L line and is connected on another voltage dependent resistor (VDR) group on the N line also to be parallel with electric capacity respectively.
7, circuit as claimed in claim 6, it is characterized in that the voltage dependent resistor (VDR) group on the described L of the being connected on line and to be connected on another voltage dependent resistor (VDR) group on the N line can be a voltage dependent resistor (VDR) or at least two voltage dependent resistor (VDR)s that are together in series or at least two voltage dependent resistor (VDR)s being together in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320126088 CN2672666Y (en) | 2003-11-21 | 2003-11-21 | Detecting circuit for anti surge property |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320126088 CN2672666Y (en) | 2003-11-21 | 2003-11-21 | Detecting circuit for anti surge property |
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| Publication Number | Publication Date |
|---|---|
| CN2672666Y true CN2672666Y (en) | 2005-01-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200320126088 Expired - Fee Related CN2672666Y (en) | 2003-11-21 | 2003-11-21 | Detecting circuit for anti surge property |
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| CN (1) | CN2672666Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101839952A (en) * | 2010-04-27 | 2010-09-22 | 北京星网锐捷网络技术有限公司 | Method and system for testing surge |
| WO2011144052A1 (en) * | 2010-05-20 | 2011-11-24 | 中兴通讯股份有限公司 | Method and apparatus for assessing protection performance of surge protection device |
| 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 |
| CN101777936B (en) * | 2009-07-02 | 2013-03-27 | 北京东土科技股份有限公司 | Surge immunity test method of high-speed signal wire |
| CN105388373A (en) * | 2015-10-29 | 2016-03-09 | 威凯检测技术有限公司 | Surge detection process tested equipment state automatic recording and analyzing system |
| CN107589326A (en) * | 2017-09-15 | 2018-01-16 | 武汉虹信通信技术有限责任公司 | A kind of surge test method and system of optical fiber composite rope power supply unit |
-
2003
- 2003-11-21 CN CN 200320126088 patent/CN2672666Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101777936B (en) * | 2009-07-02 | 2013-03-27 | 北京东土科技股份有限公司 | Surge immunity test method of high-speed signal wire |
| 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 |
| CN101839952A (en) * | 2010-04-27 | 2010-09-22 | 北京星网锐捷网络技术有限公司 | Method and system for testing surge |
| CN101839952B (en) * | 2010-04-27 | 2012-06-27 | 北京星网锐捷网络技术有限公司 | Method and system for testing surge |
| WO2011144052A1 (en) * | 2010-05-20 | 2011-11-24 | 中兴通讯股份有限公司 | Method and apparatus for assessing protection performance of surge protection device |
| CN105388373A (en) * | 2015-10-29 | 2016-03-09 | 威凯检测技术有限公司 | Surge detection process tested equipment state automatic recording and analyzing system |
| CN107589326A (en) * | 2017-09-15 | 2018-01-16 | 武汉虹信通信技术有限责任公司 | A kind of surge test method and system of optical fiber composite rope power supply unit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050119 Termination date: 20091221 |