CN103915831A - Lightening protection module and lightening protection device - Google Patents
Lightening protection module and lightening protection device Download PDFInfo
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- CN103915831A CN103915831A CN201310002469.4A CN201310002469A CN103915831A CN 103915831 A CN103915831 A CN 103915831A CN 201310002469 A CN201310002469 A CN 201310002469A CN 103915831 A CN103915831 A CN 103915831A
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- thermal cutoffs
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Abstract
The invention discloses a lightening protection module and a lightening protection device comprising the lightening protection module. The lightening protection module comprises a voltage dependent resistor (10) and a discharge tube (20). The voltage dependent resistor (10) and the discharge tube (20) are connected in series. The lightening protection module further comprises a first thermal fuse (30) which is connected with the voltage dependent resistor (10) and the discharge tube (20) in series and is arranged adjacent to the voltage dependent resistor (10) and the discharge tube (20). The first thermal fuse (30) is fused when the temperature is beyond a preset value. After the lightening protection module is connected with the first thermal fuse in series, when the temperature of the voltage dependent resistor or the discharge tube is too high, the first thermal fuse is also too high in temperature and fused to disconnect a circuit to avoid a fire hazard. The first thermal fuse allows large currents to pass through, so that it is guaranteed that the lightening protection module can normally work under the condition that the voltage dependent resistor and the discharge tube are at a normal working temperature.
Description
Technical field
The present invention relates to lightning protection field, particularly, relate to a kind of lightning-protection module and a kind of lightning protection device that comprises this lightning-protection module.
Background technology
Common so-called thunderbolt refers to a part of charged cloud layer and the cloud layer of another part band xenogenesis electric charge, or charged cloud layer is to electric discharge swift and violent between the earth.This swift and violent discharge process produces strong flash of light and follows huge sound.Certainly, the electric discharge between cloud layer mainly has harm to aircraft, and ground building and people, animal are not had a significant impact.But, the electric discharge of cloud layer to the earth is very large to building, electronic electric equipment and people, animal harm.
Charged cloud layer is due to electrostatic induction effect, make xenogenesis electric charge on a certain scope band in ground, after direct lightning strike occurs, cloud layer is charged to rapidly disappear, and some scope of ground is because spreading resistance is large, so that occur local high voltage, or due in direct lightning strike discharge process, powerful pulse current produces to wire around or metal object the phenomenon that electromagnetic induction generation high voltage is consequently launch aed surprise attack.
In order to prevent from launch aing surprise attack the generation of phenomenon, lightning-protection module is set conventionally in distribution box, form power lightning protection box.Lightning-protection module generally includes piezo-resistance and discharge tube.If outer net voltage rising amplitude is higher and the duration is longer, thereby piezo-resistance can be punctured in low resistive state by transient overvoltage, thus the time afterflow of guiding discharge pipe range, and temperature raises, and causes associated materials in lightning-protection module to catch fire.
If discharge tube or piezo-resistance can cause lightning-protection module to catch fire in overheated state for a long time.Therefore, how to prevent that lightning-protection module from becoming this area technical problem urgently to be resolved hurrily because of overheated catching fire.
Summary of the invention
The object of this invention is to provide a kind of lightning-protection module and a kind of lightning protection device, this lightning-protection module can prevent from catching fire because piezo-resistance or discharge tube lose efficacy.
To achieve these goals, as one aspect of the present invention, a kind of lightning-protection module is provided, this lightning-protection module comprises piezo-resistance and the discharge tube of series connection, wherein, this lightning-protection module also comprise connect with described piezo-resistance and described discharge tube and with the first Thermal Cutoffs of described piezo-resistance and the adjacent setting of described discharge tube, this first Thermal Cutoffs is set to fuse in the time that the temperature of this first Thermal Cutoffs exceedes predetermined value.
Preferably, described predetermined value is 100 DEG C to 150 DEG C.
Preferably, described lightning-protection module also comprises the first indicator light, and this first indicator light one end is connected electrically between described piezo-resistance and described the first Thermal Cutoffs, and the other end is provided with electric connection terminal.
Preferably, described the first indicator light is the light-emitting diode that can send green glow, and described the first indicator light allows electric current to flow to described electric connection terminal from described the first Thermal Cutoffs.
Preferably, described lightning-protection module also comprises the protective resistance of connecting with described the first indicator light.
Preferably, described lightning-protection module also comprises the second indicator light and the first rectifier diode, described the second indicator light is in parallel with described the first Thermal Cutoffs, described the first rectifier diode is in parallel with described the first indicator light, and described the first rectifier diode allows electric current to flow through described the second indicator light and described the first rectifier diode from described electric connection terminal.
Preferably, described the second indicator light is the light-emitting diode that can send ruddiness.
Preferably, described lightning-protection module also comprises the second rectifier diode, and this second rectifier diode is connected with described the second indicator light, and this second rectifier diode allows electric current to flow through described the second rectifier diode from described electric connection terminal.
Preferably, described lightning-protection module also comprises the second Thermal Cutoffs, and this second Thermal Cutoffs closes on described piezo-resistance and described discharge tube setting, and described the second Thermal Cutoffs is set to fuse in the time that the temperature of this second Thermal Cutoffs exceedes described predetermined value.
As another aspect of the present invention, a kind of lightning protection device is also provided, this lightning protection device comprises lightning-protection module, wherein, this lightning-protection module is above-mentioned lightning-protection module provided by the present invention.
Preferably, described lightning protection device also comprises remote signalling warning loop, this remote signalling warning loop comprises controller, indicator elment and described second Thermal Cutoffs of series connection, described controller and described indicator elment are all positioned at described lightning-protection module outside, and whether described controller fuses and send control signal to described indicator elment according to described the second Thermal Cutoffs.
In lightning-protection module, connect after the first Thermal Cutoffs, in the time of piezo-resistance or discharge tube excess Temperature, can cause the first Thermal Cutoffs excess Temperature.Now, the first Thermal Cutoffs can fuse, thereby circuit is disconnected, and avoids breaking out of fire.The first Thermal Cutoffs allows large electric current to pass through, and it is hereby ensured that lightning-protection module normally works in the situation that piezo-resistance temperature is lower.
Other features and advantages of the present invention are described in detail the embodiment part subsequently.
Brief description of the drawings
Accompanying drawing is to be used to provide a further understanding of the present invention, and forms a part for specification, is used from explanation the present invention, but is not construed as limiting the invention with embodiment one below.In the accompanying drawings:
Fig. 1 is the circuit diagram of lightning-protection module provided by the present invention;
Fig. 2 is the circuit diagram of lightning-protection module provided by the present invention during for three-phase electricity;
Fig. 3 is the circuit diagram of lightning-protection module provided by the present invention during for single-phase electricity.
Description of reference numerals
10 piezo-resistance 20 discharge tubes
30 first Thermal Cutoffs 40 first indicator lights
50 protective resistance 60 second indicator lights
70 first rectifier diode 80 second rectifier diodes
90 second Thermal Cutoffs 100 lightning-protection modules
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated.Should be understood that, embodiment described herein only, for description and interpretation the present invention, is not limited to the present invention.
As shown in Figure 1, the invention provides a kind of lightning-protection module, this lightning-protection module comprises piezo-resistance 10 and the discharge tube 20 of series connection, wherein, this lightning-protection module also comprise with described piezo-resistance 10 and described discharge tube 20 is connected and with the first Thermal Cutoffs 30 of described piezo-resistance 10 adjacent settings, this first Thermal Cutoffs 30 is set to fuse in the time that the temperature of this first Thermal Cutoffs 30 exceedes predetermined value.
The characteristic of the first Thermal Cutoffs 30 is, large electric current by time the fusing of can't generating heat, only have in the time that self temperature is increased to predetermined value and just can fuse.When there is when thunderbolt, in lightning-protection module, electric current is larger, and by discharge tube 20 and piezo-resistance 10 conductings, and the first Thermal Cutoffs 30 allows large electric current to pass through, thereby ensures the lightning protection function of lightning-protection module.If piezo-resistance 10 or discharge tube 20 generate heat, this piezo-resistance 10 or discharge tube 20 can cause the first Thermal Cutoffs 30 closing on to generate heat, in the time that the temperature of the first Thermal Cutoffs 30 reaches predetermined value, the first Thermal Cutoffs 30 can fuse, thereby cause lightning-protection module to be disconnected from the circuit, avoid piezo-resistance 10 or discharge tube 20 to continue heating, thereby can avoid catching fire.
Lightning-protection module also comprises housing conventionally, and piezo-resistance 10, discharge tube 20, the first Thermal Cutoffs are all encapsulated in the housing of lightning-protection module, and conventionally, this housing can be made of plastics.Can described predetermined value be set to the value between 100 DEG C to 150 DEG C, fusible in the time that the temperature of the first Thermal Cutoffs 30 exceedes this predetermined value, thus can avoid housing to catch fire.
As a kind of preferred implementation of the present invention, described lightning-protection module can also comprise the first indicator light 40, and one end of this first indicator light 40 is connected electrically between described piezo-resistance 10 and described the first Thermal Cutoffs 30, and the other end is provided with electric connection terminal b.As shown in Figure 1, can the first terminal a be set on the right side of the first Thermal Cutoffs 30, and at the opposite side of discharge tube 20, the second terminal c be set, can lightning-protection module 100 be connected in circuit according to the mode shown in the mode shown in Fig. 2 or Fig. 3.
As shown in Figure 2, lightning-protection module 100 can be arranged in three-phase circuit.Introduce the operation principle of lightning-protection module 100 to be arranged on lightning-protection module 100 between A phase line and B phase line as example.The first terminal a is electrically connected with A phase line, and electric connection terminal b is electrically connected with the second terminal c, and the second terminal c is electrically connected with B phase line.In the time that electric current is inputted from the first terminal a, can be through the first Thermal Cutoffs 30, piezo-resistance 10, discharge tube 20 and the first indicator light 40, this is the situation of normal work, the first indicator light 40 can send pilot light.If the first Thermal Cutoffs 30 fuses, in the circuit of lightning-protection module 100, do not have electric current to pass through, the first indicator light 40 can be not luminous, thereby can tell operator's lightning-protection module 100 to break down, and remind operator to change.
As can be seen from Figure 2, between A phase line and B phase line, be provided with lightning-protection module 100, between A phase line and ground wire PE, being provided with lightning-protection module 100(the first terminal a is connected with A phase line, the second terminal c is connected with ground wire PE, electric connection terminal b is connected with the second terminal c), between B phase line and ground wire PE, be also provided with lightning-protection module 100(the first terminal a and be connected with B phase line, the second terminal c is connected with ground wire PE, and electric connection terminal b is connected with the second terminal c).
In the time that in A phase line and B phase line, voltage is excessive, the lightning-protection module being arranged between A phase line and B phase line can make the voltage in A phase line and B phase line be uniformly distributed, part higher than operating voltage in A phase line can be guided to undergroundly and be arranged on lightning-protection module 100 between A phase line and ground wire PE, the lightning-protection module 100 being arranged between B phase line and ground wire PE can be guided to underground by the part higher than operating voltage in B phase line.In the time of lightning-protection module 100 normal work, the first indicator light 40 is luminous.In the time that the first Thermal Cutoffs 30 disconnects, the first indicator light 40 extinguishes, and reminds operator to change lightning-protection module.
Between B phase line and C phase line, be also provided with lightning-protection module 100, the operation principle of this lightning-protection module 100 is identical with the operation principle of lightning-protection module 100 and the effect of performance between A phase line and B phase line.Between C phase line and ground wire PE, be also provided with lightning-protection module 100, the effect of this lightning-protection module 100 is the part higher than operating voltage in C phase line to be incorporated into underground.
Between zero line N and ground wire PE, be also provided with lightning-protection module 100, now, the first terminal a of lightning-protection module 100 is connected with zero line N, the second terminal c is connected with ground wire PE, electric connection terminal b and one electrical connection in phase line A, phase line B and phase line C are (in Fig. 2 for to be connected with phase line C, main purpose is to power for the first indicator light 40), in the time that zero line N is charged, can the voltage on zero line N be imported underground.
Shown in Fig. 3 is the circuit diagram of lightning-protection module of the present invention during for single-phase electricity.As can be seen from Figure 3, between live wire L and zero line N, being connected with lightning-protection module 100(the first terminal a is connected with live wire L, the second terminal c is connected with zero line N, electric connection terminal b is connected with the second terminal c), between live wire L and ground wire PE, being connected with lightning-protection module 100(the first terminal a is connected with live wire L, the second terminal c is connected with ground wire PE, electric connection terminal b is connected with the second terminal c), between zero line N and PE, being connected with lightning-protection module 100(the first terminal a is connected with zero line N, the second terminal c is connected with ground wire PE, electric connection terminal b is connected with live wire L, the main purpose that electric connection terminal b is connected with live wire L is to power for the first indicator light 40).
In the present invention, the first indicator light 40 can be any electronic component that can be luminous, for example, the first indicator light 40 can be for sending the light-emitting diode of green glow, and the first indicator light 40 allows electric current to flow to described electric connection terminal b from described the first Thermal Cutoffs 30.As shown in fig. 1, the negative electrode of the first indicator light 40 is connected with electric connection terminal b.
For the first indicator light 40 is normally worked, preferably, described lightning-protection module can also comprise the protective resistance 50 of connecting with described the first indicator light 40.Protective resistance 50 can prevent that the first indicator light 40 is reversed and puncture.
Conventionally, described lightning-protection module is for alternating current circuit.For alert more accurately, preferably, described lightning-protection module can also comprise the second indicator light 60 and the first rectifier diode 70, described the second indicator light 60 is in parallel with described the first Thermal Cutoffs 30, described the first rectifier diode 70 is in parallel with described the first indicator light 40, and described the first rectifier diode 70 allows electric current to flow through described the second indicator light 60 and described the first rectifier diode 70 from described electric connection terminal b.
Preferably, the light of the first indicator light 40 is different from the light color of the second indicator light 60.For example, the light of the first indicator light 40 can be green, and the color of the second indicator light 60 can be red.
In the situation that the first Thermal Cutoffs 30 does not have fusing and electric connection terminal b to be connected with the second terminal c, in the time that electric current is inputted from the first terminal a, electric current is directly luminous by the first Thermal Cutoffs 30, the first indicator lights 40, the first instruction 40 lamps.Reverse when electric current, during from the second terminal c input, electric current, by the first rectifier diode 70, protective resistance 50, then flows through the first Thermal Cutoffs 30.
In the situation that there is no thunder and lightning, the state of discharge tube 20 in disconnecting, electric current can not pass through piezo-resistance 10, and only, in the situation that thunder and lightning weather discharge tube 20 is breakdown, electric current just can pass through discharge tube 20 and piezo-resistance 10.
At the first Thermal Cutoffs 30 fusing and electric connection terminal b are not connected with the second terminal c in the situation that, discharge tube 20 has does not have breakdown the first indicator light 40 all can be luminous.
In the situation that the first Thermal Cutoffs 30 fuses, electric current can not flow to the second terminal c from the first terminal a, and therefore, the first indicator light 40 is not luminous.In the time that electric current flows to the first terminal a from the second terminal c, electric current flows through the first rectifier diode 70, protective resistance 50, and flows to the second indicator light 60, makes the second indicator light 60 luminous.
Preferably, the second indicator light 60 can be for sending the light-emitting diode of ruddiness.As shown in FIG., the anode of the second indicator light 60 is electrically connected with the part between piezo-resistance 10 and the first Thermal Cutoffs 30.
Puncture in order to prevent that the second indicator light 60 is reversed, preferably, described lightning-protection module can also comprise the second rectifier diode 80, this second rectifier diode 80 is connected with described the second indicator light 60, and this second rectifier diode 80 allows electric current to flow through described the second rectifier diode 80 from described electric connection terminal b., as shown in FIG., the second rectifier diode 80 and the second indicator light 60 arrange in the same way.
Introduce the operation principle of the preferred embodiment of the present invention below in conjunction with Fig. 2.Be introduced as an example of the lightning-protection module between A phase line and B phase line example.
The first terminal a is electrically connected with A phase line, and electric connection terminal b is electrically connected with the second terminal c, and the second terminal c is electrically connected with B phase line.In the time that electric current is inputted from the first terminal a (; electric current is in the time of positive half wave); can be through the first Thermal Cutoffs 30, protective resistance 50, the first indicator light 40; the second rectifier diode 80 and the second indicator light 60 oppositely end; this is the situation of normal work; the first indicator light 40 can send green glow, and the second indicator light 60 is not luminous.Herein, one skilled in the art will appreciate that in the situation that there is no thunder and lightning, the state of discharge tube 20 in disconnecting, electric current can not pass through piezo-resistance 10, and only, in the situation that thunder and lightning weather discharge tube 20 is breakdown, electric current just can pass through discharge tube 20 and piezo-resistance 10.
At the first Thermal Cutoffs 30 fusing and electric connection terminal b are not connected with the second terminal c in the situation that, discharge tube 20 has does not have breakdown the first indicator light 40 all can be luminous.
When electric current is from second terminal c when input (, electric current is in the time of negative half-wave), electric current by the first rectifier diode 70 flow to the first Thermal Cutoffs 30(now the first Thermal Cutoffs 30 by the second indicator light 60 short circuits, so the second indicator light 60 is not luminous).Because the frequency of alternating current is higher, with people's naked eyes, the first indicator light 40 is always luminous.
If the first Thermal Cutoffs 30 fuses, in the time that electric current is inputted from the first terminal a (, electric current is in the time of positive half wave), circuit breaker, the first indicator light 40 can be not luminous, in the time that electric current is inputted from the second terminal c (, electric current is in the time of negative half-wave), oppositely cut-off is not luminous for the first indicator light 40, and electric current flows to the first terminal a by the first rectifier diode 70 and by the second indicator light 60 and the second rectifier diode 80, and the second indicator light 60 sends ruddiness in this case.Similarly, with people's naked eyes, the second indicator light 60 is always luminous.
As shown in fig. 1, as a kind of preferred implementation of the application, described lightning-protection module can also comprise the second Thermal Cutoffs 90, this second Thermal Cutoffs 90 closes on described piezo-resistance 10 and discharge tube 20 (for example arranges, the first Thermal Cutoffs 30 and the second Thermal Cutoffs 90 can be separately positioned on the two sides of piezo-resistance 10, or be separately positioned on the two ends of piezo-resistance 10, thereby can judge the temperature at piezo-resistance 10 diverse location places), and this second Thermal Cutoffs 90 is set to fuse in the time that the temperature of this second Thermal Cutoffs 90 exceedes described predetermined value.Should be understood that, the second Thermal Cutoffs 90 is also encapsulated in lightning-protection module inside.The concrete effect of the second Thermal Cutoffs 90 will at length be introduced hereinafter.
As another aspect of the present invention, a kind of lightning protection device is also provided, this lightning protection device comprises lightning-protection module 100, wherein, this lightning-protection module 100 is above-mentioned lightning protection device provided by the present invention.
Described lightning protection device can be power lightning protection box, and lightning-protection module 100 can prevent from catching fire in described lightning protection device.
Conventionally, lightning protection device is arranged in the space of sealing, and staff not constantly can be near lightning protection device.For example, in railway lightning protection field, mostly the machine room that lightning protection device is set is unattended.Now, for handled easily personnel judge whether lightning-protection module breaks down, remote signalling warning loop can be set in lightning protection device.This remote signalling warning loop can comprise controller, indicator elment and described second Thermal Cutoffs 90 of series connection, described controller and described indicator elment are all positioned at described lightning-protection module outside, and whether described controller fuses and send control signal to described indicator elment according to described the second Thermal Cutoffs 90.
In the time that the first Thermal Cutoffs 30 fuses, the second Thermal Cutoffs 90 also can fuse, and controller sends control signal to described indicator elment after collecting the signal of disconnection of the second Thermal Cutoffs 90, and described indicator elment is reported to the police.Like this, the operating personnel that are positioned at outside machine room still can judge whether lightning-protection module 100 breaks down.
In the present invention, described indicator elment can be that indicator light can be also electric bell etc., as long as can play the effect of warning.
In lightning-protection module, connect after the first Thermal Cutoffs, in the time of piezo-resistance or discharge tube excess Temperature, can cause the first Thermal Cutoffs excess Temperature.Now, the first Thermal Cutoffs can fuse, thereby circuit is disconnected, and avoids breaking out of fire.The first Thermal Cutoffs allows large electric current to pass through, and it is hereby ensured that lightning-protection module normally works lower in the situation that in piezo-resistance and discharge tube temperature.
Below describe by reference to the accompanying drawings the preferred embodiment of the present invention in detail; but; the present invention is not limited to the detail in above-mentioned execution mode; within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition each the concrete technical characterictic described in above-mentioned embodiment, in reconcilable situation, can combine by any suitable mode.For fear of unnecessary repetition, the present invention is to the explanation no longer separately of various possible compound modes.
In addition, also can carry out combination in any between various execution mode of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (11)
1. a lightning-protection module, this lightning-protection module comprises piezo-resistance (10) and the discharge tube (20) of series connection, it is characterized in that, this lightning-protection module also comprise connect with described piezo-resistance (10) and described discharge tube (20) and with first Thermal Cutoffs (30) of described piezo-resistance (10) and the adjacent setting of described discharge tube (20), this first Thermal Cutoffs (30) is set to fuse in the time that the temperature of this first Thermal Cutoffs (30) exceedes predetermined value.
2. lightning-protection module according to claim 1, is characterized in that, described predetermined value is 100 DEG C to 150 DEG C.
3. lightning-protection module according to claim 1 and 2, it is characterized in that, this lightning-protection module also comprises the first indicator light (40), this the first indicator light (40) one end is connected electrically between described piezo-resistance (10) and described the first Thermal Cutoffs (30), and the other end is provided with electric connection terminal (b).
4. lightning-protection module according to claim 3, it is characterized in that, described the first indicator light (40) is for sending the light-emitting diode of green glow, and described the first indicator light (40) allows electric current to flow to described electric connection terminal (b) from described the first Thermal Cutoffs (30).
5. lightning-protection module according to claim 4, is characterized in that, this lightning-protection module also comprises the protective resistance (50) of connecting with described the first indicator light (40).
6. lightning-protection module according to claim 4, it is characterized in that, this lightning-protection module also comprises the second indicator light (60) and the first rectifier diode (70), described the second indicator light (60) is in parallel with described the first Thermal Cutoffs (30), described the first rectifier diode (70) is in parallel with described the first indicator light (40), and described the first rectifier diode (70) allows electric current to flow through described the second indicator light (60) and described the first rectifier diode (70) from described electric connection terminal (b).
7. lightning-protection module according to claim 6, is characterized in that, described the second indicator light (60) is for sending the light-emitting diode of ruddiness.
8. lightning-protection module according to claim 7, it is characterized in that, this lightning-protection module also comprises the second rectifier diode (80), this second rectifier diode (80) is connected with described the second indicator light (60), and this second rectifier diode (80) allows electric current to flow through described the second rectifier diode (80) from described electric connection terminal (b).
9. lightning-protection module according to claim 1 and 2, it is characterized in that, this lightning-protection module also comprises the second Thermal Cutoffs (90), this second Thermal Cutoffs (90) closes on described piezo-resistance (10) and described discharge tube (20) arranges, and described the second Thermal Cutoffs (90) is set to fuse in the time that the temperature of this second Thermal Cutoffs (90) exceedes described predetermined value.
10. a lightning protection device, this lightning protection device comprises lightning-protection module (100), it is characterized in that, described lightning-protection module (100) is the lightning-protection module described in any one in claim 1 to 9.
11. lightning protection devices according to claim 10, it is characterized in that, this lightning protection device also comprises remote signalling warning loop, this remote signalling warning loop comprises controller, indicator elment and described second Thermal Cutoffs (90) of series connection, described controller and described indicator elment are all positioned at described lightning-protection module outside, and whether described controller fuses and send control signal to described indicator elment according to described the second Thermal Cutoffs (90).
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN114189161A (en) * | 2021-12-17 | 2022-03-15 | 东莞市迈思普电子有限公司 | Guide rail power adapter with high lightning protection grade capable of serving as lightning protector |
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CN201854029U (en) * | 2010-11-23 | 2011-06-01 | 上海伊莱克斯实业有限公司 | Direct current power supply surge protection circuit |
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