CN1174449C - Electronic module and matched main and subcontact arc-supression method - Google Patents
Electronic module and matched main and subcontact arc-supression method Download PDFInfo
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- CN1174449C CN1174449C CNB011054654A CN01105465A CN1174449C CN 1174449 C CN1174449 C CN 1174449C CN B011054654 A CNB011054654 A CN B011054654A CN 01105465 A CN01105465 A CN 01105465A CN 1174449 C CN1174449 C CN 1174449C
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- contact
- electronic module
- resistance
- main
- secondary contact
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Abstract
The present invention relates to an electronic module and an arc suppression method of matching a main contact and a subsidiary contact. The present invention has two unidirectional thyristors; anodes and cathodes are connected reversely in parallel; the anodes of the thyristors and a control pole are connected with resistors R1 and R2 in series; any end of double polar bodies is connected with a current limiting resistor R3 in series; double poles encapsulated in an insulation shell V are led out by conducting wires. The present invention is especially suitable for the arc suppression action of switches with high voltage and large power.
Description
Technical field
The present invention relates to a kind of electronic module circuit and cooperate main and auxiliary contact to press down the arc method, can in big electric current, high voltage knife switch and various power load switch such as circuit breaker, contactor, widely use.
Background technology
In recent years, the electronic circuit arc extinguishing method that occurs, main and auxiliary contact arc extinguishing method etc., but they all are to be connected in parallel between switch two contacts, when the switch disjunction, high pressure still is with at the circuit two ends, in case a high voltage is arranged, high-energy produces at power end, will be under the disjunction situation, produce the misoperation of moment by-pass shunt,, and then burn out so that open a way high power transistor or piezo-resistance puncture short.In puncture short and the moment that burns out open circuit, can cause switch ends to be switched on, equipment fault or personal safety problem appear, and be unsafe.As Chinese patent literature CN1170214A disclosed " two ends activation arc suppressor ", it is to tie power transistor after accepting the disjunction signal by an insulated gate bipolar, with the shunting of the current bypass between contact the two poles of the earth, has avoided arcing between contact.Insulated gate bipolar knot power transistor in this method, it is the MOS high power device, reach high voltage, big electric current will be very expensive, and again and be connected between switch the two poles of the earth, in switch disjunction long-time, stand floating voltage, in case be subjected to the high-tension attack that occurs in thunder and lightning or the electrical network from power supply, the MOS power device is easy to damage, the elder generation short circuit, after blow, will cause in this course equipment or the person safety failure.
Chinese patent literature CN2085092U disclosed " exchange arc extinguishing electronic module " and for example is when it is switched on or switched off at appliance switch, owing to the arc extinguishing effect is played in the bypass in parallel of bidirectional triode thyristor.But, be in when turn-offing at appliance switch, when having a similar lightning induction pulse wave, phase line comes, and bidirectional triode thyristor is also conducting at once, and energized will cause the equipment sudden startup suddenly, and the person such as is hit suddenly at unsafe factor.Owing to this control mode of bidirectional triode thyristor, can not bear the moment impact of high voltage (surpassing reverse breakdown voltage) and big electric current equally, in high voltage, big current domain, be difficult to use.
Summary of the invention
The objective of the invention is provides a kind of reasonable in design in order to overcome the deficiency of prior art, long service life in loud-break switch and the electronic module of safety, and its cooperates the main and auxiliary contact of switch easy to use, and it is respond well to press down arc.
The present invention implements by following technical solution.This electronic module comprises two unidirectional controllable silicon S CR
1, SCR
2, its anode and negative electrode reverse parallel connection; Series resistance R between the controllable silicon anode and the control utmost point
1, R
2, it can be adjusted to two one-way SCRs band control, the breakover voltage unanimity, the discharge tube with bi-directional symmetrical has promptly been formed dis-eff; At the arbitrary end series limiting resistor of dis-eff R
3, its size is decided R by voltage and load current that switch cuts off
3=V/I, the resistor power size is still by I
2RT is fixed, because time t is moment, power is not too large, and the two poles of the earth are drawn by lead.Since controllable silicon performance difference, resistance R
1, R
2Two ends can also shunt capacitance C
1, C
2, first resistance R
1Two ends first capacitor C in parallel
1, second resistance R
2Two ends be parallel with second capacitor C
2
They make electronic module with the discharge tube mode discharge, and to reach every us be hundreds of volts on state voltage climbing and off state voltage blocking-up rate during discharge.
Electronic module of the present invention has the characteristic of bi-directional symmetrical semiconductor discharge tube.Even have the instant high-voltage voltage of several times of one-way SCR puncture voltages (even surpass), big electric current pulse wave to attack, also can be pressed into discharge tube breakover voltage, for example 20V～2/3P
FV following (PF is the silicon controlled peak value of forward block voltage) is absorbed into ground with electric energy.Arc current imports electronic module by secondary contact between the contact, and electronic module is absorbed into ground with arc energy.This is and the difference that has various arc extinguishing modules and arcing contact now, also is its unique advantage.Its voltage-current characteristic is seen Fig. 2.
Electronic module of the present invention cooperates main and auxiliary contact to press down the arc method, is that power load switch is provided with main and auxiliary contact, and secondary contact can be discrete with main contact, also can one, and electronic module is connected between secondary contact and the ground wire (or grounded neutral wire).Main and auxiliary contact is discrete, secondary contact dielectric height H=main contact height h
1+ plug-in strip height W
1Main contact is left in-plug-in strip lower edge, and the upper edge embeds secondary contact degree of depth σ, that is: H=h
1+ w
1-σ. the main and auxiliary contact one, above main contact, connecing the preceding paragraph insulator, insulator top connects secondary contact metal intermediate plate again, and wherein the height of insulator is h, lacks 2 σ than the plug-in strip height.
This method, during near disjunction, secondary contact is switched at the on-load switch main contact, can arc current be introduced ground by electronic module.During switch closure, before main contact was near closure, secondary contact was closed in advance, can arc current be absorbed into ground by electronic module, and main contact is closed fully again.All arc current can be absorbed into ground in disjunction and closed moment, promptly resist the generation of electric arc and spread.
Electronic module of the present invention design is ingenious, cheap, cooperates main and auxiliary contact easy to use in loud-break switch, reliable and safety, and it is respond well to press down arc.
Description of drawings
Fig. 1 is a module line map of the present invention.
Fig. 2 is the module volt-ampere characteristics of figure; Wherein: I
AkBe conducting electric current, V
AkBe forward blocking voltage, V
BoBe changing voltage.
Fig. 3 is that module is at two-phase knife switch using method schematic diagram; Wherein: L-power supply phase line, L '-load power source line, N
(PE)-be connected on the neutral line, N '
(PE)-load ground connection center line, M-electronic module, 4-fusible link, 5-insulator.
Fig. 4 is that module is at Three-phase knife switch using method schematic diagram; Wherein: L
1, L
2, L
3-phase line, A, B, C-load phase, M-electronic module, 4-fusible link, 5-insulator.
Fig. 5 is the using method partial schematic diagram of module in the main and auxiliary contact one; Wherein: L
1-electric power incoming line, L '-power outlet (connecing load), M-electronic module, 4-fusible link, 5-insulator.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further described.
Electronic module embodiment 1.Electronic module comprises two unidirectional controllable silicon S CR
1, SCR
2, its anode and negative electrode reverse parallel connection; Series resistance R between the controllable silicon anode and the control utmost point
1, R
2, its resistance is adjustable between tens of kilo-ohms to hundreds of kilo-ohms, and this example is 500 kilo-ohms, and breakover voltage is adjusted in 50V, and makes forward and reverse breakover voltage unanimity, has above-mentionedly formed dis-eff of the present invention.At big, noninductive current-limiting resistance R of power of the arbitrary end series connection of dis-eff
3, to several ohm, this example is 1.8 ohm to its resistance from number/one ohm.The housing of module is the suitable housing of shape that customizes according to the position of electronic module in on-load switch, is cast by epoxy resin high temperature resistant, high insulativity to form, and the two poles of the earth are drawn by lead.This module has possessed the characteristic of the high power discharge pipe that high voltage, big electric current are sparked.
Electronic module embodiment 2.See Fig. 1, since controllable silicon performance difference, portions of electronics module resistance R
1, R
2Two ends shunt capacitance C
1, C2, this example is 1.5nf, makes two silicon controlled conductings and by synchronous with external voltage, electric current; All the other are with example 1.
Press down arc method 1 (split of single-phase plug-in strip main and auxiliary contact).See Fig. 3, electronic module M is connected on the secondary contact 2 and grounded neutral wire N of switch
(PE)Between.If main contact 1 highly is h
1, plug-in strip 3 highly is W
1, secondary contact 2 dielectric height H, main contact is left in the plug-in strip lower edge, and the degree of depth that the upper edge embeds secondary contact upper end metal clip is σ.Formula H=h is then arranged
1+ W
1-σ.The size of σ is decided by the voltage height and the size of current that need disjunction, the voltage height, and electric current is big, and σ is big more.The contact size is decided by the supply voltage of wanting disjunction and load current.When just separately main contact and upper edge had embedded the secondary contact metal clip in the plug-in strip lower edge, the breaking arc electric current was absorbed into ground by electronic module.When closing a floodgate, power supply and load voltage difference cause the moment arc current, also import module by secondary contact and are absorbed into ground.At separating brake or combined floodgate, to finish after the arc current discharge, secondary contact is not charged, and the high impedance that has electronic module over the ground and had has guaranteed to press down the safe, reliable of arc process and divide-shut brake process.
Press down arc method 2 (split of three-phase plug-in strip main and auxiliary contact).See Fig. 4,3 module M of this example
1, M
2, M
3Be connected between 3 secondary contacts 2 and the ground wire (neutral line).Secondary contact 2 dielectric height H are with method 1.When plug-in strip 3 will leave main contact 1, its upper edge had entered secondary contact upper end metal clip, and in this moment, secondary contact is absorbed into ground with the high-voltage great-current that separating brake causes synchronously through electronic module, has avoided the generation of spark arc.In the secondary contact metal clip to after cutting off the electricity supply through the load flyback current of moment, also continue to be absorbed into ground by module.After plug-in strip left secondary contact, secondary contact recovered high resistance.Otherwise, in making process, the reverse action when pressing down the arc method and being separating brake.
Press down arc method 3 (main and auxiliary contact one).See Fig. 5, when main and auxiliary contact constituted one, electronic module M was connected between secondary contact 2 and the ground wire.Connect the preceding paragraph insulator 5 above main contact 1, insulator top connects secondary contact metal intermediate plate 2 again, and wherein the height of insulator is h, highly lacks 2 σ than plug-in strip 3; Promptly when main contact will be left in the plug-in strip lower edge, the plug-in strip upper edge has embedded in the secondary contact metal intermediate plate, the degree of depth is 2 σ, makes arc current that main contact will produce when separating brake import electronic module and is absorbed into ground again, play equally disjunction, closed moment but the arc effect.Though some complexity of secondary contact assembly technology, its security reliability is taken the course of its own.
Represent with knife switch, an example wherein just, it also can use in other switch and circuit breaker, contactor, and principle is identical.
Claims (8)
1, a kind of electronic module is characterized in that, comprises two one-way SCR (SCR
1, SCR
2), its anode and negative electrode reverse parallel connection; Between the controllable silicon anode and the control utmost point series resistance (R is arranged respectively
1, R
2), and formed dis-eff, be in series with current-limiting resistance (R at the arbitrary end of dis-eff
3), the two poles of the earth are drawn by lead.
2, by the described electronic module of claim 1, it is characterized in that described two series resistance (R
1, R
2) resistance is adjustable between tens of kilo-ohms to hundreds of kilo-ohms, makes forward blocking voltage be adjusted in 20V----2/32/3P
FV.
3, by the described electronic module of claim 1, it is characterized in that described current-limiting resistance (R
3) be a non-inductive resistance, its resistance from number/one ohm to several ohm.
4, by claim 1 or 2 described electronic modules, it is characterized in that the described first resistance (R
1) the two ends first electric capacity (C in parallel
1), the second resistance (R
2) two ends be parallel with the second electric capacity (C
2).
5, by claim 1 or 2 described electronic modules, it is characterized in that its housing is the suitable housing of shape that customizes according to the position of electronic module in on-load switch, cast by epoxy resin high temperature resistant, high insulativity and form.
6, a kind of electronic module cooperates main and auxiliary contact to press down the arc method, it is characterized in that power load switch is provided with main and auxiliary contact, and secondary contact can be discrete with main contact, can be one with main contact also, and electronic module is connected between secondary contact and ground wire or the grounded neutral wire; When switchblade knife will leave main contact, its upper edge had entered secondary contact upper end metal clip, and in this moment, secondary contact is absorbed into ground with the high-voltage great-current that separating brake causes synchronously through electronic module; In the secondary contact metal clip to after cutting off the electricity supply through the momentary load flyback current, also continue to be absorbed into ground by electronic module; After plug-in strip left secondary contact, secondary contact recovered high resistance; Otherwise, in making process, the reverse action when pressing down the arc method and being separating brake.
7, by the described arc method that presses down of claim 6, it is characterized in that secondary contact and main contact are discrete, main contact is left in secondary contact dielectric height H=main contact height h1+ plug-in strip height w1-plug-in strip lower edge, and the upper edge embeds secondary contact degree of depth б, that is: H=h1+w1-б.
8, by the described arc method that presses down of claim 6, it is characterized in that secondary contact and main contact one, connect the preceding paragraph insulator above main contact, insulator top connects secondary contact metal intermediate plate again, and wherein the height of insulator is h, lacks 2 б than the plug-in strip height.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011054654A CN1174449C (en) | 2001-02-28 | 2001-02-28 | Electronic module and matched main and subcontact arc-supression method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011054654A CN1174449C (en) | 2001-02-28 | 2001-02-28 | Electronic module and matched main and subcontact arc-supression method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1372282A CN1372282A (en) | 2002-10-02 |
| CN1174449C true CN1174449C (en) | 2004-11-03 |
Family
ID=4654543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011054654A Expired - Fee Related CN1174449C (en) | 2001-02-28 | 2001-02-28 | Electronic module and matched main and subcontact arc-supression method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1174449C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104730414A (en) * | 2015-01-28 | 2015-06-24 | 合肥天海电气技术有限公司 | Circuit selecting device and method for single-phase grounding of resonance grounding system |
-
2001
- 2001-02-28 CN CNB011054654A patent/CN1174449C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1372282A (en) | 2002-10-02 |
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