CN101752858B - Multi-gap metal gas discharge tube power supply over-voltage protection module - Google Patents
Multi-gap metal gas discharge tube power supply over-voltage protection module Download PDFInfo
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- CN101752858B CN101752858B CN2009103031373A CN200910303137A CN101752858B CN 101752858 B CN101752858 B CN 101752858B CN 2009103031373 A CN2009103031373 A CN 2009103031373A CN 200910303137 A CN200910303137 A CN 200910303137A CN 101752858 B CN101752858 B CN 101752858B
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Abstract
The invention relates to a multi-gap metal gas discharge tube (hereinafter referred to as M-GDT) power supply over-voltage protection module, which mainly consists of the M-GDT. A terminal electrode A of the M-GDT is in conducive connection with a phase line L of a power supply, A terminal electrode A' of the M-GDT is in conductive connection of a neutral line N or a protective earth PE of the power supply, intermediate electrodes of K1-Kn of the M-GDT are respectively in conductive connection with one ends of voltage dependent resistors of MOV1-MOVn, and the other ends of the MOV1-MOVn are in conductive connection with the terminal electrode A or the terminal electrode A' of the M-GDT. The product of the invention has no potential safety hazard, large current capacity, no continuous current, high reliability and good stability.
Description
Technical field
The present invention relates to power-supply system overvoltage protection technology, relate in particular to multi-gap metal gas discharge tube (hereinafter to be referred as M-GDT) power supply over-voltage protection module.
Background technology
Lightning protection for power supply is claimed lightning arrester or Surge Protector again, is called for short SPD (SurgeProtection Divice, Surge Protector), is made up of several over-voltage protection modules.Therefore, the performance of lightning protection for power supply depends on the performance of over-voltage protection module basically.The over-voltage protection module of each lightning protection for power supply is main at present is to adopt band heat to break away from the piezo-resistance (hereinafter to be referred as MOV) of alarm device ST or MOV and the single gap gas discharge tube GDT tandem compound that band heat breaks away from alarm device ST.
Above-mentioned existing over-voltage protection module has following shortcoming:
The MOV that breaks away from alarm device ST like Fig. 1, band heat directly is used in power supply phase line L to zero line N overvoltage protection; When the thunderbolt energy was excessive, MOV can burst, and open failure occurs; And can't start alarm; Provide alarm signal, make power supply be in unshielded state, and remaining thunderbolt energy will damage power-supply device when bursting; When the energy of the switching overvoltage of power-supply system greatly when MOV can not consume, MOV is with puncture short because the energy that power-supply system provides is very huge, electric arc forms rapidly, release unit ST can't hightail and be prone to cause fire to take place this moment.
When directly being used in power supply phase line L to zero line N overvoltage protection like Fig. 2, the MOV that is with heat disengaging alarm device ST and single gap gas discharge tube GDT tandem compound; Because the through-flow energy of single gap gas discharge tube GDT of series connection reaches the existence of afterflow greatly; Above-mentioned two kinds of situation can appear equally; Because of there not being other replacement scheme, the overvoltage of always using MOV to protect power-supply system over year surplus in the of 40 is caving-in bash really.
Summary of the invention
The object of the present invention is to provide the M-GDT power supply over-voltage protection module, have potential safety hazard to solve existing lightning protection for power supply, have shortcomings such as afterflow.
In order to achieve the above object, M-GDT power supply over-voltage protection module of the present invention adopts following technical scheme:
M-GDT power supply over-voltage protection module of the present invention mainly is made up of M-GDT (being multi-gap metal gas discharge tube).The termination electrode A of said multi-gap metal gas discharge tube is connected with phase line of power L conduction, and the termination electrode A ' of multi-gap metal gas discharge tube is connected with the zero line N of power supply (or protection ground PE) conduction; Said multi-gap metal gas discharge tube comprises n target K1～Kn, wherein n=1; Said target K1～Kn is connected with piezo-resistance MOV1～MOVn conduction respectively, and the other end of piezo-resistance MOV1～MOVn is connected with the termination electrode A or the termination electrode A ' conduction of multi-gap metal gas discharge tube.
It is pointed out that the size of neglecting supply voltage greatly of n and decide (as: 50Hz AC 220V rms gets n=4).
Technique scheme is further set forth:
Be provided with three independent gaps between adjacent two electrodes of said M-GDT.
The termination electrode A ' of said M-GDT is equipped with hot release unit ST, and termination electrode A ' is connected with zero line N or protection ground PE through said hot release unit ST; When the temperature of the termination electrode A ' of multi-gap metal gas discharge tube reaches when breaking away from threshold values, said hot release unit ST breaks away from from termination electrode A ', thus the open end electrode A ' be connected with the conduction of zero line N (or protect PE).
One side of said hot release unit is provided with sensitive switch SW, and said sensitive switch SW is associated with stand by lamp D, remote signalling interface E respectively; Start sensitive switch SW when said hot release unit ST breaks away from from termination electrode A ', when sensitive switch SW starts respectively to stand by lamp D, remote signalling interface E outputting alarm signal.
Said multi-gap metal gas discharge tube power supply over-voltage protection module also comprises circuits for triggering F, and said circuits for triggering F is connected between said termination electrode A and the termination electrode A '.
Said circuits for triggering F comprises transformer T, capacitor C 3, capacitor C 4, switching device Q; One end of the elementary winding of said transformer T is connected with the end conduction of the same name of secondary level winding through capacitor C 3, switching device Q, and the other end of the elementary winding of transformer T is connected with the end conduction of the same name of secondary level winding through capacitor C 4.
Said switching device Q includes but not limited to: two utmost point gas discharge tubes, Transient Suppression Diode, controllable silicon.
Multi-gap metal gas discharge tube power supply over-voltage protection module of the present invention has following advantage:
Through above technical scheme; The present invention does not have potential safety hazard, through-current capability is big, residual voltage is low, no afterflow, reliability high, good stability, has thoroughly solved Lightning Over-voltage in DC48V, AC50Hz 110V, 220V, 380V, 440V or the like the power-supply system, switching overvoltage and the superpotential protection question of electromagnetic pulse.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work property, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the circuit diagram of existing power supply over-voltage protection module;
Fig. 2 is the circuit diagram of another existing power supply over-voltage protection module;
Fig. 3 a is the circuit theory diagrams of first embodiment of the invention;
Fig. 3 b is the equivalent circuit diagram of Fig. 3 a;
Fig. 4 a is the circuit theory diagrams of second embodiment of the invention;
Fig. 4 b is the equivalent circuit diagram of Fig. 4 a;
Fig. 5 is the circuit theory diagrams of third embodiment of the invention;
Fig. 6 is the circuit theory diagrams of fourth embodiment of the invention;
Fig. 7 is the circuit theory diagrams of circuits for triggering of the present invention;
Fig. 8,9, the 10th, the physical circuit figure of circuits for triggering of the present invention.
Embodiment
In order fully to disclose technical scheme of the present invention, be that those skilled in the art can realize the present invention, below in conjunction with accompanying drawing the present invention is carried out detailed description.
Need to prove that the present invention has adopted novel M-GDT, comprise a target at least between two termination electrodes of this M-GDT, be provided with three independent gaps between two of this M-GDT adjacent electrodes simultaneously.
Referring to Fig. 3 a, be the circuit theory diagrams of first embodiment of the invention.The M-GDT power supply over-voltage protection module of present embodiment mainly is made up of M-GDT.The termination electrode A of said M-GDT is connected with phase line of power L conduction; The termination electrode A ' of M-GDT is connected with the zero line N of power supply or protection ground PE conduction; Target K1～Kn of M-GDT is connected with the end conduction of MOV1～MOVn respectively, and the other end of MOV1～MOVn is connected with the termination electrode A ' conduction of M-GDT.
More specifically, the termination electrode A ' of said M-GDT is equipped with hot release unit ST, and termination electrode A ' is connected with zero line N or protection ground PE through said hot release unit ST; When the temperature of the termination electrode A ' of M-GDT reaches when breaking away from threshold values, said hot release unit ST breaks away from from termination electrode A ', thus the open end electrode A ' be connected with the conduction of zero line N (or protect PE).Simultaneously; The side of hot release unit ST is provided with sensitive switch SW; When breaking away from from termination electrode A ', hot release unit ST starts sensitive switch SW; Said sensitive switch SW is associated with stand by lamp D, remote signalling interface E respectively, when sensitive switch SW starts respectively to stand by lamp D, remote signalling interface E outputting alarm signal.
Referring to Fig. 3 b is the equivalent circuit diagram of Fig. 3 a; Its operation principle is following: when the circuit of Fig. 3 a is in off position; M-GDT is equivalent to capacitor C 1 series connection that n capacitance equates, MOV1～MOVn is equivalent to the capacitor C 2 that n capacitance equates, wherein C2 is far longer than C1.When pulse surge is invaded between the power supply L-N; Because the dividing potential drop effect A-K1 gap of electric capacity is through MOV1 conducting in advance; In the short time voltage after the conducting of A-K1 gap between L-N by the MOV1 clamper because the arc light pressure drop of A-K1 is low, the last voltage of MOV1 will start successively K1-K2, K2-K3, K3-K4 ..., Kn-A ' the gap; Whole M after the conducting of Kn-A ' gap-GDT conducting; After whole M-GDT conducting because the voltage of keeping M-GDT arc discharge between A-A ' is lower than the pressure sensitive voltage of MOV1～MOVn, and MOV1～MOVn quits work, the overcurrent M-GDT that all flows through.Later because the crest voltage of power supply is lower than the voltage of keeping the M-GDT arc discharge, M-GDT's pulse surge quits work and blow-out, returns to non-conductive state.
Referring to Fig. 4 a is the circuit theory diagrams of second embodiment of the invention.The difference of the present embodiment and first embodiment is; The other end of the said MOV1～MOVn that is connected with the M-GDT conduction is connected with the termination electrode A conduction of M-GDT; Its operation principle and first is implemented to be equal to, A '-K1, K1-K2, K2-K3, K3-K4 ..., Kn-A conducting successively.
Particularly, the M-GDT shown in Fig. 4 a in the present embodiment comprises target K1～Kn, and said target K1～Kn is respectively with MOV1～the MOVn conduction is connected, and the other end of MOV1～MOVn is connected with the termination electrode A of M-GDT.Simultaneously; Hot release unit ST is installed on the termination electrode A ' of said M-GDT; When the temperature of the termination electrode A ' of M-GDT reaches when breaking away from threshold values; Said hot release unit ST breaks away from from termination electrode A ', thus the open end electrode A ' be connected with the conduction of zero line N (or protection ground PE), thereby as having realized protecting the purpose of follow-up power consumption equipment.
Side like Fig. 3 b, the said hot release unit ST of 4b is provided with sensitive switch SW; E is related with stand by lamp D, remote signalling interface respectively for said sensitive switch SW; Start sensitive switch SW when hot release unit ST breaks away from from termination electrode A ', when sensitive switch SW starts respectively to stand by lamp D, remote signalling interface E outputting alarm signal.In concrete the realization, said hot release unit ST can be a spring leaf, and an end of this spring leaf is welded on the termination electrode A ' of multi-clearance ceramet gas discharge tube with solder (like tin).When the temperature of multi-clearance ceramet gas discharge tube termination electrode A ' reached the fusing point of scolder, spring leaf broke away from from the termination electrode A ' of multi-clearance ceramet gas discharge tube.Spring leaf from A ' thus sensitive switch SW exerted pressure when breaking away from and starts sensitive switch SW.Respectively to stand by lamp D, remote signalling interface E outputting alarm signal, stand by lamp D was reddened by green after sensitive switch SW started, and remote signalling interface E sends alarm signal to long distance control system.
Need to prove that hot release unit ST and sensitive switch SW are interaction relations, before ST broke away from from A ', the closed SW1-2 of SW1-1 broke off, and green indicating lamp LED1 is bright, and the closed SW2-2 of SW2-1 breaks off, and remote signalling interface E does not have signal output; After ST broke away from from A ', it is closed that SW1-1 breaks off SW1-2, and red led LED2 is bright, and it is closed that SW2-1 breaks off SW3-2, and remote signalling interface E has signal output.
Discharge tube adopts multi-clearance ceramet gas discharge tube among the present invention; Being equivalent to a plurality of discharge tube series connection uses; The gap A-K1 of discharge tube adjacent electrode, K1-K2 ..., Kn-A ' (or A '-K1, K1-K2 ..., Kn-A) conducting successively; Its deboost is equivalent to the interelectrode pulse breakdown voltage of A-K1, thereby residual voltage is quite low.Simultaneously, overvoltage M-GDT later returns to not on-state rapidly and the afterflow phenomenon can not occur, thus the reliability, stability and the fail safe that have improved the multi-gap metal gas discharge tube power supply over-voltage protection module.Simultaneously, hot release unit SW is installed on the termination electrode A ' of M-GDT, its objective is the fail safe of further raising multi-gap metal gas discharge tube power supply over-voltage protection module, to avoid beyond thought adverse consequences, like fire etc.Devices such as sensitive switch SW, remote signalling interface E, stand by lamp D make the staff can find in time that abnormal conditions appear in over-voltage protection module, and in time it are keeped in repair, in order to avoid follow-up power consumption equipment suffers damage.
Referring to Fig. 5 is the circuit theory diagrams of third embodiment of the invention, and present embodiment has increased circuits for triggering F on the basis of first embodiment.These circuits for triggering F is connected between the A end and A ' end of multi-gap metal gas discharge tube, and wherein the G of circuits for triggering F end is connected with said A end conduction, and the H end is connected with said A ' end conduction.Need to prove that G end, H end do not have direction relations between A-A ', be connected that the H end is connected with said A end conduction when the G of circuits for triggering F end conducts electricity with said A ' end.
As shown in Figure 7, be the circuit theory diagrams of circuits for triggering F.Circuits for triggering F comprises transformer T, capacitor C 3, capacitor C 4, switching device Q; One end of the elementary winding of said transformer T is connected with the end conduction of the same name of secondary level winding through capacitor C 3, switching device Q, and the other end of the elementary winding of transformer T is connected with the end conduction of the same name of secondary level winding through capacitor C 4.In the time of between the overvoltage invasion A-A '; M-GDT also do not have before the conducting in addition A-K1 (A '-before K1) gap does not also have conducting; Overvoltage is at first passed through switching device Q, capacitor C 3, the conducting of the secondary level of transformer T winding, thereby has improved the corresponding speed of over-voltage protection module, and its deboost is equivalent to the puncture voltage of switching device Q simultaneously; Thereby can further reduce residual voltage, in order to avoid residual voltage is destroyed follow-up power consumption equipment.
In concrete the realization, said switch element Q can for: two utmost point gas discharge tubes, Transient Suppression Diode, controllable silicon can also be other switching devices simultaneously.As shown in Figure 8, switch element Q is two utmost point gas discharge tube GDT; As shown in Figure 9, switch element Q is Transient Suppression Diode TVS; Shown in figure 10, switch element Q is a controllable silicon SCR.
Referring to Fig. 6 is the circuit theory diagrams of fourth embodiment of the invention, and present embodiment has increased on the basis of second embodiment and Power Generation Road F.These circuits for triggering F is connected between the A end and A ' end of multi-gap metal gas discharge tube, and wherein the G of circuits for triggering F end is connected with said A end conduction, and the H end is connected with said A ' end conduction.
The circuits for triggering F of present embodiment has identical internal circuit with the circuits for triggering F of the 3rd embodiment, and its operation principle is identical and have identical beneficial effect, is not repeated in this description here.
Multi-clearance ceramet gas discharge tube power supply over-voltage protection module of the present invention has reduced security against fire hidden danger, low, the no afterflow of residual voltage, and high, the good stability of reliability can protect follow-up power consumption equipment not damaged by overvoltage to greatest extent simultaneously.
The above is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; Can also make some improvement and retouching, these improvement and retouching also are regarded as protection scope of the present invention.
The above is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; Can also make some improvement and retouching, these improvement and retouching also are regarded as protection scope of the present invention.
Claims (1)
1. multi-gap metal gas discharge tube power supply over-voltage protection module; It is characterized in that: mainly form by multi-gap metal gas discharge tube; The termination electrode A of said multi-gap metal gas discharge tube is connected with phase line of power (L) conduction, and the termination electrode A ' of multi-gap metal gas discharge tube is connected with the zero line (N) or protection ground (PE) conduction of power supply; Said multi-gap metal gas discharge tube comprises n target (K1～Kn), wherein n >=1; (K1～Kn) (MOV1～MOVn) conduction is connected said target, and (MOV1～other end MOVn) is connected with the termination electrode A of multi-gap metal gas discharge tube or termination electrode A ' conduction piezo-resistance with piezo-resistance respectively.
2. multi-gap metal gas discharge tube power supply over-voltage protection module as claimed in claim 1 is characterized in that: be provided with three independent gaps between adjacent two electrodes of said multi-gap metal gas discharge tube.
3. according to claim 1 or claim 2 multi-gap metal gas discharge tube power supply over-voltage protection module; It is characterized in that: the termination electrode A ' of said multi-gap metal gas discharge tube is equipped with hot release unit (ST), and termination electrode A ' is connected with zero line (N) or protection ground (PE) through said hot release unit (ST); When the temperature of the termination electrode A ' of multi-gap metal gas discharge tube reaches when breaking away from threshold values, said hot release unit (ST) breaks away from from termination electrode A ', thus the open end electrode A ' with zero line (N) or protect the conduction of (PE) be connected.
4. multi-gap metal gas discharge tube power supply over-voltage protection module as claimed in claim 3 is characterized in that:
One side of said hot release unit is provided with sensitive switch (SW), and said sensitive switch (SW) is associated with stand by lamp (D), remote signalling interface (E) respectively;
Start sensitive switch (SW) when said hot release unit (ST) breaks away from from termination electrode A ', when sensitive switch (SW) starts respectively to stand by lamp (D), remote signalling interface (E) outputting alarm signal.
5. multi-gap metal gas discharge tube power supply over-voltage protection module as claimed in claim 3 is characterized in that:
Said multi-gap metal gas discharge tube power supply over-voltage protection module also comprises circuits for triggering (F), and said circuits for triggering (F) are connected between said termination electrode A and the termination electrode A '.
6. multi-gap metal gas discharge tube power supply over-voltage protection module as claimed in claim 5 is characterized in that:
Said circuits for triggering (F) comprise transformer (T), capacitor C 3, capacitor C 4 and switching device (Q); One end of the elementary winding of said transformer (T) is connected with the end conduction of the same name of secondary level winding through being connected in series of capacitor C 4 and switching device (Q), and the other end of the elementary winding of transformer (T) is connected with the other end conduction of secondary level winding through capacitor C 3.
7. multi-gap metal gas discharge tube power supply over-voltage protection module as claimed in claim 6 is characterized in that:
Said switching device (Q) comprising: two utmost point gas discharge tubes, Transient Suppression Diode, controllable silicon.
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| CN2009103031373A CN101752858B (en) | 2009-06-10 | 2009-06-10 | Multi-gap metal gas discharge tube power supply over-voltage protection module |
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| CN2009103031373A CN101752858B (en) | 2009-06-10 | 2009-06-10 | Multi-gap metal gas discharge tube power supply over-voltage protection module |
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| CN101752858B true CN101752858B (en) | 2012-02-29 |
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| DE102011052689B4 (en) * | 2011-08-12 | 2016-09-01 | Phoenix Contact Gmbh & Co. Kg | Gas-filled surge arrester with indirect monitoring of a short-circuit spring |
| CZ305207B6 (en) * | 2012-08-28 | 2015-06-10 | Saltek S.R.O. | Circuit arrangement of overvoltage protection firing circuit |
| CN103969529A (en) * | 2014-05-14 | 2014-08-06 | 菲尼克斯亚太电气（南京）有限公司 | Multi-layer gap type lightning arrester indicating circuit |
| CN104283204B (en) * | 2014-10-11 | 2017-03-08 | 广东佛电电器有限公司 | The lightning protection thermel protection device of three-phase leakage switch |
| CN106257786B (en) * | 2016-09-18 | 2020-07-28 | 四川中光防雷科技股份有限公司 | High-safety multilayer gap type surge protection device |
| CN109936124A (en) * | 2017-12-15 | 2019-06-25 | 中兴通讯股份有限公司 | A kind of Security Unit |
| CN107919661A (en) * | 2017-12-28 | 2018-04-17 | 浙江多格电气有限公司 | A kind of modular Surge Protector |
| CN110739673B (en) * | 2018-07-20 | 2021-12-14 | 硕天科技股份有限公司 | Surge protection device |
| US11223200B2 (en) * | 2018-07-26 | 2022-01-11 | Ripd Ip Development Ltd | Surge protective devices, circuits, modules and systems including same |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB628635A (en) * | 1947-01-29 | 1949-09-01 | Hirst Electronic Dev Ltd | Improvements relating to electric timing circuits using cold-cathode gas discharge tubes |
| CN2243728Y (en) * | 1995-11-17 | 1996-12-25 | 李长益 | Low-voltage distribution module for prevention of lightning shock |
| CN201478825U (en) * | 2009-06-10 | 2010-05-19 | 东莞市新铂铼电子有限公司 | Power supply over voltage protection module for multi-gap metal gas discharge tube |
-
2009
- 2009-06-10 CN CN2009103031373A patent/CN101752858B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB628635A (en) * | 1947-01-29 | 1949-09-01 | Hirst Electronic Dev Ltd | Improvements relating to electric timing circuits using cold-cathode gas discharge tubes |
| CN2243728Y (en) * | 1995-11-17 | 1996-12-25 | 李长益 | Low-voltage distribution module for prevention of lightning shock |
| CN201478825U (en) * | 2009-06-10 | 2010-05-19 | 东莞市新铂铼电子有限公司 | Power supply over voltage protection module for multi-gap metal gas discharge tube |
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