CN206076936U - A kind of power circuit lightning protection circuit module and intelligent lightning protection device - Google Patents

Abstract

This utility model is related to a kind of power circuit lightning protection circuit module and intelligent lightning protection device, the power circuit lightning protection circuit module includes the TSPD lightning-protection modules being connected in parallel between prime power firestreak L and mains neutral line N and the 2nd TSPD lightning-protection modules being connected in parallel between rear class power firestreak L and mains neutral line N, the first lightning current frequency impedance control unit is in series with respectively on every power circuit between a TSPD lightning-protection modules and the 2nd TSPD lightning-protection modules, power circuit is divided into prime circuit and rear class circuit by the first lightning current frequency impedance control unit, switching mode lightning protection component is parallel between the N lines and PE lines of front and back stages respectively, coupling between PE lines and working grounding cable has the second lightning current frequency impedance control unit.The module is existing to power-supply system lightning protection and the isolating and protecting device for preventing ground potential high pressure from strikeing back, while also providing the protection circuit structure for power circuit and ground path.

Description

A kind of power circuit lightning protection circuit module and intelligent lightning protection device

Technical field

This utility model is related to anti-thunder technical field, and in particular to a kind of power circuit lightning protection circuit module and intelligent lightning protecting Device.

Background technology

From the point of view of the Lightning disturbance model and damage ratio of radio communication base station, lightning current mainly from power port and connects Ground port is invaded to system, causes base station interior power equipment and communication equipment to damage.Therefore, in order to be effectively protected radio communication The equipment of base station system, needs while power-supply system, earthed system to radio communication base station are protected just effectively to drop Low lightning strike accident.

Existing radio communication base station power-supply system lightening arresting method technical difficult points and hidden danger have at present：

1st, according to standard and actual techniques application, power-supply system lightning protection must be that one, two, three is multistage using multistage protection Lightning protection circuit, realizes multi-stage diffluence, amplitude limit, for the purpose of pressure limiting；And the mounting distance to per grade has wanting more than 10 meters Ask, but single, the independent machine room having (such as radio communication base station machine room, repeater) hardly possible realizes one, two, three mounting bar Part.

If in the case that the 2, lightning protection device cable decoupling distance is inadequate, realizing one, two, three lightning protection device order using decoupler Start, although prevented because two, three-level lightning protection device starting time itself is fast, the little large lightning current overload damage for causing of through-current capacity is asked Topic, but the demand of low residual voltage cannot be solved, for accurate equipment, too high residual voltage will also result in device damage.

3rd, as conventional power source line thunder protection device solves lightning protection event using the collocation method of lightning-protection module series connection air switch The short-circuit and on fire hidden danger of barrier, causes air switch tolerate impact of being struck by lightning and causes tripping operation to make lightning protection device exit protection, when after Directly invade to by protection equipment during continuous thunderbolt invasion.This method limits lightning protection characteristic and purpose, can cause lightning protection device Back-up breaker can not be coordinated, coordinate with lightning protection device and major loop air switch, and residual voltage is high, impact resistance ability.Due to distribution system Short-circuiting device configuration with thunder resisting equipment in chopper type selecting by two parts（Producer）Segmentation is completed, the open circuit of lightning protection device prime Device cannot tolerate the impact of large lightning current, therefore lightning protection device chopper limits the discharge current ability of lightning protection device, not by lightning protection The effect of device performs to maximum.According to industry standard, the maximum series connection 100A choppers of 100kA lightning protection devices prime, actual measurement are impacted During 50-60kA, chopper just trips, and lightning protection device exits protection.As the maximum current value for loading air switch is fixed, load is caused The difficult matching of air switch, lightning protection air switch, lightning protection device.Trip during the little lightning protection of lightning protection air switch；Big load trip, power cut-off.

4th, according to IEC shunting models, when the lightning protection device of outside lightning protection or power-supply system has Lightning disturbance, moment is too highly Net current potential, have 50% lightning current strike back to power-supply system, signaling system, metallic conduit etc..Can not solve simultaneously in industry at present Technology and product that certainly power-supply system lightning protection and the counterattack of earthed system high pressure suppress.

5th, in the thunder resisting equipment application and installation environment of old technology, power lightning protection box and the counterattack of ground potential high pressure suppress case A system, combination cost when production, assembling, transport, rehandling, installation are constituted by two products and equipment The defect such as height, man-hour length, volume is big, weight is big, installation complexity.

By taking current mobile communication base station earthed system as an example, its earth lead mainly includes lightning proof ground by function classification（PE）With Protecting field（Casing ground GND）Two classes.Lightning proof ground：Refer to that the power circuit for equipment or system, signal line provide by-pass shunt Thunder and lightning overvoltage in circuit is carried out shunting, is shifted by the device of passage over the ground；Its cable for connecting over the ground is lightning protection Line.Protecting field：Avoid AC and DC power supply line from constituting a threat to equipment and the person, the not charged metal chassis in equipment and ground phase Even, when there is electric leakage or casing is powered, it is ensured that personal safety.In ideal two classes ground should it is separate, do not interfere with each other, or Each own independent grounded screen, especially accurate terminal unit can not be affected by lightning protection ground potential, otherwise have high pressure The danger of counterattack.But earthing mode adopts conbined earthing system now, will all earth leads（Lightning proof ground, protecting field）It is connected on one On block bus-bar, it is connected with earth mat by downlead.Existing earthing mode has following defect and deficiency：

1st, influence each other between earthed system, grounding apparatus.As lightning proof ground and place of working, the ground wire of protecting field all lead to Crossing the concurrent of same bus-bar, the mode of common network carries out joint grounding, even if therefore earth resistance reaches standard, both mutual Affect also very big, will be along weak ground wire when especially lightning surge voltage enters union ground grid by lightning protection（Equipment connects Ground wire, working earthing lines）Mutually conducted, disturbed, being caused the counterattack of ground potential high pressure and high pressure conduction.

2nd, understand that ground potential is to refer to zero potential according to traditional sense, but when outside lightning protection device, spark gap introduce thunderbolt After electric current, moment forms voltage difference to equipment by ground potential too high, and the dash current of moment is impacted to equipment or casing.According to IEC shunting models, after external buildings are struck by lightning, have 50% thunder-strike current to strike back to power-supply system, signaling system, metal The systems such as pipeline, cause equipment counterattack to damage.Traditional method is to reduce system earth resistance as far as possible, as early as possible diffusing, Reduce impulse resistance, equipment and earth mat are realized into equipotential link, but due under thunder amplification current and thunder and lightning frequency effect, line It is in high impedance, induction reactance between cable（Unless connected using superconducting conductor）, voltage difference, cable can be formed under heavy current impact effect Pressure reduction can be calculated according to U=Ldi/dt formula, therefore the method cannot solve ground potential counterattack.

Utility model content

In view of this, it is necessary to which a kind of power circuit lightning protection circuit module and intelligent lightning protection device are provided, it is existing to power supply System thunder defending and the isolating and protecting device that ground potential high pressure strikes back is prevented, while also providing for power circuit and ground path Protection circuit structure.

A kind of power circuit lightning protection circuit module, which includes being connected in parallel between prime power firestreak L and mains neutral line N First TSPD lightning-protection modules and the 2nd TSPD lightning-protection modules being connected in parallel between rear class power firestreak L and mains neutral line N, It is in series with the first lightning current frequency on every power circuit between first TSPD lightning-protection modules and the 2nd TSPD lightning-protection modules respectively Power circuit is divided into prime circuit and rear class line by rate impedance control unit, the first lightning current frequency impedance control unit Road, is parallel with switching mode lightning protection component, respectively between the mains neutral line N and protection ground wire PE of front and back stages in protection ground wire Coupling between PE and the working grounding cable GND by protection equipment has the second lightning current frequency impedance control unit.

Further, a TSPD lightning-protection modules include the first TSPD lightning protection of multiphase corresponding with the power circuit number of phases Module, the first TSPD lightning protection modules of each phase include many sheet resistance TMOV, and many sheet resistance TMOV in each phase compose in parallel first to be prevented Thunder major loop.

Further, each described resistance TMOV and first Thermal Cutoffs concatenation be connected in mains neutral line N with Between corresponding power line, many sheet resistance TMOV in each phase are parallel with indicating circuit.

Further, the 2nd TSPD lightning-protection modules include the 2nd TSPD lightning protection of multiphase corresponding with the power circuit number of phases Module, the 2nd TSPD lightning protection modules of each phase include an at least sheet resistance TMOV, the resistance TMOV and a second temperature in each phase Electric fuse concatenation is connected between mains neutral line N and corresponding power line, to constitute the second lightning protection major loop, the resistance in each phase TMOV is parallel with indicating circuit.

Further, each indicating circuit includes being electrically connected with successively diode, display lamp, resistance, the instruction electricity Road is series between mains neutral line N and corresponding power line with corresponding Thermal Cutoffs, the indicating circuit and corresponding electricity Mains neutral line N is connected to after resistance TMOV is in parallel.

Further, many sheet resistance TMOV and indicating circuit be with pcb board, the pcb board and thereon each Device epoxy resin encapsulated is encapsulated in a lightning protection module shell.

Further, the lightning protection module shell leads to the pluggable terminals foot and TSPD remote signalling pins for connecting each power line, And lead to every phase TSPD status indicator lamp.

Further, front and back stages two switching mode lightning protection components in the supply property line N with protection ground wire PE Between connect with the second lightning current frequency impedance control unit after parallel connection, the lightning protection module shell also leads to protects ground wire PE two The pluggable terminals foot at end.

Further, each resistance TMOV is glued with a remote signalling electric fuse, and each remote signalling electric fuse in each phase is in parallel A pair of remote signalling pins being connected on pcb board, this pair of remote signalling pin are connected to monitoring singlechip or monitoring alarm element circuit, with The malfunction of the TSPD intelligent lightning protecting modules of every phase is monitored.

And, a kind of intelligent lightning protection device, which includes device case and power circuit lightning protection circuit mould as above Block, the power circuit lightning protection circuit module are installed on described device housing, and each of the power circuit lightning protection circuit module inserts Pull out terminal supportor or pin to be drawn by device case.

In said power supply line lightning protection circuit module and its lightning protection device, using resistance TMOV (Thermal protection type varistor) Lightning protection module, two main devices technologies of lightning current frequency impedance controller are combined, and are needed according to actual technology and are wanted Asking carries out Proper Match, is protected and is designed from power lightning protection system and earthed system simultaneously respectively, is combined into a collection three Finely protection and earthed system high pressure strike back the combination technique for suppressing to cross streams power-supply system.Further, in power circuit Connect lightning current frequency impedance control unit（ALFB 1-4）, can play different to the lightning current frequency in its set point Suppress impedance, realize suppressing thunder and lightning frequency impedance, isolate, when there is thunder and lightning to invade from power port, be connected on power circuit On ALFB be in high impedance status in the presence of lightning current frequency, force most of lightning current from the first lightning-protection module of prime Earth mat is branched to, the second lightning-protection module of rear class is then limited and clamper to small part thunder and lightning overvoltage, make what outfan was exported Residual voltage level of relative is relatively low, realizes the method and purpose of the low residual voltage of prime high throughflow, rear class.And, in earth mat（PE）End and guarantor Series connection lightning current frequency impedance controller between shield ground (GND) end, when lightning current is invaded（ALFB 5）Moment is in a big resistance Anti- device, and the impedance is certain to more than earth resistance impedance, according to current characteristics（Electric current walks low-impedance path）, force thunder Electric current can only realize big resistance eutral grounding technology toward the earth mat earial drainage less than his impedance, electric discharge, so as to be grounded the anti-of system Separate with protecting field thunder, make two ground references separate, do not interfere with each other when having Lightning disturbance, eliminate ground potential anti- Hit, isolate conduction of the lightning current to protecting field equipment.Thus, by the fusion of above-mentioned each device, realize to power circuit point The effect of stream, pressure limiting and earth mat counterattack blocking, improves degree of protection and the safety of equipment, lifting means lightning protection effect.

Description of the drawings

Fig. 1 is the power circuit lightning protection circuit module diagram of this utility model embodiment.

Fig. 2 is that the single-phase TSPD lightning protection modules in the power circuit lightning protection circuit module of this utility model embodiment show It is intended to.

Fig. 3 is that the single-phase 2nd TSPD lightning protection modules in the power circuit lightning protection circuit module of this utility model embodiment show It is intended to.

Specific embodiment

This utility model is described in detail below with reference to specific embodiments and the drawings.

Fig. 1 is referred to, a kind of power circuit lightning protection circuit module 100 of this utility model embodiment is shown, it is main to apply In the lightning protection of power circuit, it is used for example in novel wireless communication base station power system thunder defending and prevents ground potential high pressure from strikeing back, and Protection equipment end 50.As shown in figure 1, power circuit has L1 lines, L2 lines, L3 lines, N lines（Mains neutral line）And PE lines（Protect Shield ground wire）.Module 100 includes being connected in parallel on prevents including the TSPD being connected in parallel between prime power firestreak L and mains neutral line N Thunder module 10 and the 2nd TSPD lightning-protection modules 20 being connected in parallel between rear class power firestreak L and mains neutral line N, first On every power circuit L1 line, L2 lines, L3 lines, N lines between TSPD lightning-protection modules 10 and the 2nd TSPD lightning-protection modules 20 respectively It is in series with the first lightning current frequency impedance control unit（ALFB）30, the first lightning current frequency impedance control unit 30 is by electricity Source circuit is divided into prime circuit and rear class circuit, in parallel between the mains neutral line N and protection ground wire PE of front and back stages respectively There is switching mode lightning protection component 41,42, coupling between the protection ground wire PE and working grounding cable GND by protection equipment has the second thunder and lightning Stream frequency impedance control unit 35.

As illustrated in fig. 1 and 2, specifically, a TSPD lightning-protection modules 10 include corresponding with the power circuit number of phases many The first TSPD lightning protection modules of phase, the present embodiment include the first TSPD lightning protection module 11b of the first TSPD lightning protection module 11a, B phase of A phases, The first TSPD lightning protection module 11c of C phases, each phase the first TSPD lightning protection modules 11a, 11b, 11c include multi-disc Thermal protection type pressure respectively Quick resistance 12, i.e. resistance TMOV, multi-disc TMOV12 in each phase compose in parallel the first lightning protection major loop.As shown in Fig. 2 with A phases As a example by first TSPD lightning protection module 11a, which includes three TMOV12a, 12b, 12c, further, each described TMOV12a, 12b, 12c and one first Thermal Cutoffs 13a, 13b, 13c concatenation are connected between mains neutral line N and corresponding power line, Multi-disc TMOV 12 in each phase is parallel with the first indicating circuit.

First lightning current frequency impedance control unit 30 has four the first lightning current frequency impedance controllers 31, right respectively Ying Yusi bar power lines, as ALFB1-4.Second lightning current frequency impedance control unit 35 is an ALFB5, that is, be connected to guarantor Protect ground wire PE and by single line between the working grounding cable GND of protection equipment.These ALFB enter to more than 99% various lightning waveforms Row blocking, the alternating current unrestraint to power frequency 50Hz are acted on, and every line power frequency load current of ALFB is up to 380V/60A, full The large-scale base of sufficient 40KW（Office）The load capacity requirement stood.

As shown in figs. 1 and 3, specifically, the 2nd TSPD lightning-protection modules 20 include multiphase corresponding with the power circuit number of phases Two TSPD lightning protection modules, the 2nd TSPD lightning protection modules of each phase include at least a piece of TMOV 22, the TMOV 22 in each phase and one The concatenation of second temperature electric fuse 23 is connected between mains neutral line N and corresponding power line, to constitute the second lightning protection major loop, respectively TMOV 12 in phase is parallel with the second indicating circuit.In the embodiment of diagram, using a piece of TMOV 22 and a second temperature The concatenation of electric fuse 23 constitutes the second lightning protection major loop.

Specifically, each first indicating circuit and the second indicating circuit structure are identical, respectively including being electrically connected with successively Diode 151, display lamp 152, resistance 153, each indicating circuit are series in power supply with corresponding Thermal Cutoffs 13 or 23 Between line N and corresponding power line, each indicating circuit is connected to mains neutral line N with after corresponding TMOV 12,22 parallel connections to property. Each TMOV 12 is glued with a remote signalling electric fuse 16, and each TMOV 22 is glued with a remote signalling electric fuse 26.Such as Fig. 2 and 3 Shown, three TMOV 12a, 12b, 12c are close to remote signalling electric fuse 16a, 16b, a 16c respectively, and each remote signalling in each phase is protected Dangerous silk 16,26 is parallel-connected to a pair of the remote signalling pins 17,27 on pcb board, and this pair of remote signalling pin 17,27 is connected to monitoring monolithic Machine or monitoring alarm element circuit, are monitored with the malfunction to the TSPD intelligent lightning protecting modules of every phase.

Each Thermal Cutoffs preferably adopts 40kA alloy-type temperature fuses, possesses tolerance maximum 8/20us thunder-strike currents 40kA impacts are not turned off, and are provided simultaneously with the disconnection of power frequency 250V/50Hz/ 60A short circuit currents, are prevented MOV on fire or short circuit causes Power system failure, latent fire hazard can be prevented effectively from.The fusing point and major loop Thermal Cutoffs of monitoring function Thermal Cutoffs Unanimously, the febrile state of major loop Thermal Cutoffs is monitored, transmits a signal to alarm mechanism；TMOV technology modules Using, lightning protection air switch can be omitted in systems in practice, meet distribution and lightning protection dash current requirement, will without disaster hidden-trouble etc. Ask, solve power frequency heavy-current open circuit dropout, heating dropout, mutually heavy current impact, the function such as backup and remote signalling monitoring.When certain After TMOV failures, remaining TMOV still normally can be used, and 3 TMOV possess mutual backup functionality, can more preferable protection equipment.

As shown in figure 1, further, multi-disc TMOV 12a, 12b, 12c and each TMOV 22 indicate electricity with corresponding With on a pcb board, the pcb board and each device epoxy resin encapsulated thereon are encapsulated in a lightning protection module shell on road It is interior.The lightning protection module shell leads to the pluggable terminals foot and TSPD remote signalling pins for connecting each power line, and leads to every phase TSPD status indicator lamps 152.

Further, in two switching mode lightning protection components 41,42 property line N and the protecting field in the supply of front and back stages Connect with the second lightning current frequency impedance control unit 35 after parallel connection between line PE, the lightning protection module shell also leads to protecting field The pluggable terminals foot 43 and 45 at line PE two ends.The switching mode lightning protection component 41,42 can be but not limited to discharging gap, gas Discharge tube, thyristor etc..

Therefore, the existing power firestreak ground protection of the present embodiment, also has mesh grounding components of system as directed schemes of prevention against lightning, i.e. profit With ALFB lightning currents frequency impedance control unit by the PE in equipment and system and GND ground（Place of working, protecting field）Carry out point Class, isolation, are connected on PE ground（Lightning proof ground）With GND ground（Protecting field）Between lightning current frequency impedance suppressor working frequency range and Suppress impedance between 100hz-1Mhz, the electric current unrestraint to direct current and power frequency 50Hz is acted on.Can be to the thunder and lightning in the range of this Stream frequency is presented different impedances, realizes suppressing thunder and lightning frequency impedance, isolates.Prevent the lightning current high pressure on PE ground from strikeing back to quilt The GND ground of protection equipment（Place of working, protecting field）.The impedance of the second lightning current frequency impedance control unit 35 can basis（RL= 2 πfL）Formula is calculated, and its f is lightning current dynamic frequency.Frequency range is determined by the unique material of magnetic core, is special material.

Operation principle：When power circuit has Lightning disturbance, the TMOV lightning protection module moments being connected in parallel on power circuit will Lightning current is released to greatly（PE）End, when there is Lightning disturbance at PE ends, the second lightning current frequency impedance control unit of earth terminal 35（ALFB5）35 according to the frequency for invading lightning current（100Hz-1MHz）Change and change itself internal resistance and formed with individual high impedance device Part, due to the low-impedance path characteristic of electric current, forces lightning current shunt toward the earth mat on earth resistance ground, so as to realize earth mat （PE）End is to protecting field（GND）The high pressure counterattack at end.By the comparing of test model, the second lightning current frequency impedance is flow through The counterattack electric current of control unit 35 is 5%, illustrates that 95% lightning current is all isolated by thunder and lightning frequency impedance controller, realizes height The suppression of pressure counterattack.In real work, the lower end of thunder and lightning frequency impedance controller is to be grounded, and the impedance of its kilo-ohm of level surpasses significantly The impedance of hundred Europe level of earth mat is crossed, the diffusing effect of joint earth mat is added, therefore it is anti-to flow through the moment of thunder and lightning frequency impedance controller Electric current very little is hit, lightning current can only flow to earth mat, it was confirmed that the effect that high pressure counterattack suppresses, so that lightning proof ground becomes uniquely Thunder and lightning leakage path, also specification earthed system.Effectively solving ground potential strikes back the harm to system equipment, while realizing big The function and demand of earth resistance lightning protection.

In addition, the thunder and lightning frequency impedance of the present embodiment is by calculating, 99% energy of various lightening pulses concentrates on 1MHz It is interior, by taking 8/20us impulse waveforms as an example, energy 73.37% is concentrated in 100kHz, concentrate energy 90% in 183kHz, concentrate in 1MHz Energy 99.87%, can synchronously isolate the thunder energy characteristic of 100Hz-1MHz using multiple-pulse thunder and lightning synchronization isolator, you can The ground potential high pressure counterattack of blocking 99%, realizes the protection of above earth potential counterattack.As the energy of lightning current starts to swash from 10kHz Increase, to 1MHz accumulations to the 99.87% of whole energy, therefore, the impedance design of lightning current frequency impedance controller is also according to this Individual impedance operator, thunder energy are accumulated between 100kHz-200kHz, and the maximum impedance of lightning current frequency impedance controller is then Between 100kHz-300kHz, impedance operation curve and thunder energy Automatic Frequency are adapted to, by the energy of thunder and lightning to greatest extent Synchronous to isolate, pressure is released over the ground, so as to protection equipment.More than 99% various lightning waveforms are blocked, to direct current and work The electric current unrestraint effect of frequency 50Hz.

On the other hand the present embodiment also provides a kind of intelligent lightning protection device, and which includes device case 101 and as mentioned above Power circuit lightning protection circuit module 100, the power circuit lightning protection circuit module 100 is installed on described device housing 101, institute The each pluggable terminals foot or pin for stating power circuit lightning protection circuit module is drawn by device case 101.For example, L1 lines, L2 lines, L3 Line, N lines（Mains neutral line）And the pluggable terminals foot of PE lines is all drawn in device case 101, wherein, L1 lines, L2 lines, L3 Line, N lines share a terminal supportor, have input terminal foot 102 and lead-out terminal foot 103 respectively.43 He of pluggable terminals foot of PE lines 45 draw in device case 101, and wherein PE output pluggable terminals foot 45 is connected with the working grounding cable 51 of equipment end.

During concrete application, intelligent lightning protection device is connected to into equipment end 50 by cable or other pluggable terminals, is made Power circuit lightning protection circuit module 100 being capable of preferable protection equipment end 50.So, by said power supply line lightning protection circuit Module and its lightning protection device, carry out group using TMOV lightning protection modules, two main devices technologies of lightning current frequency impedance controller Close, needed according to actual technology and requirement carries out Proper Match, carried out from power lightning protection system and earthed system simultaneously respectively Protection and design, are combined into the collection three-phase alternating current origin system combination skill that finely protection and the counterattack of earthed system high pressure suppress Art.Further, connected in power circuit lightning current frequency impedance control unit（ALFB 1-4）, can be to its set point Interior lightning current frequency plays different suppression impedances, realizes suppressing thunder and lightning frequency impedance, isolation, when having thunder and lightning from power end During mouth invasion, the ALFB on power circuit is connected in the presence of lightning current frequency in high impedance status, forces most of thunder Electric current branches to earth mat from the first lightning-protection module of prime, and the second lightning-protection module of rear class is then limited to small part thunder and lightning overvoltage System and clamper, make the residual voltage level of relative of outfan output relatively low, realize the method and mesh of the low residual voltage of prime high throughflow, rear class 's.And, in earth mat（PE）Lightning current frequency impedance controller of connecting and protecting field (GND) end between is held, when lightning current is invaded When（ALFB 5）Device of the moment in a big impedance, and the impedance is certain to more than earth resistance impedance, according to current characteristics （Electric current walks low-impedance path）, force lightning current realize big resistance eutral grounding toward the earth mat earial drainage less than his impedance, electric discharge Technology, so as to the lightning proof ground for being grounded system is separated with protecting field, makes two ground references separate, has Lightning disturbance When do not interfere with each other, eliminate ground potential counterattack, isolate conduction of the lightning current to protecting field equipment.Thus, by above-mentioned each device Fusion, realizes the effect to power circuit shunting, pressure limiting and earth mat counterattack blocking, improves the degree of protection and safety of equipment Property, lifting means lightning protection effect.

Further, due to the built-in backup devices of having connected of each TMOV of TMOV lightning protection modules, when applying Series connection air switch can be cancelled, ensured that maximum through-current capability does not turn off the ability that need to be disconnected with failure power frequency short circuit current, carried High protective capacities and safety；Composed in parallel by TMOV more than multi-disc 25kA in TMOV lightning protection module, the alloy of every TMV Type Thermal Cutoffs possesses the 40kA impacts of tolerance maximum 8/20us thunder-strike currents and does not turn off, and is provided simultaneously with power frequency 250V/50Hz/ 60A short circuit currents disconnect, and prevent MOV on fire or power system failure that short circuit causes, can be prevented effectively from latent fire hazard.It is built-in The monitoring of major loop safety position and indicate per phase LED state, realize supervising the on off operating mode of every phase TMOV lightning protection module Survey, obtain real-time status signal, reduce maintenance cost.

It should be noted that this utility model is not limited to above-mentioned embodiment, essence is created according to of the present utility model God, those skilled in the art can also make other and change, these changes done according to creative spirit of the present utility model, all Should be included in this utility model it is claimed within the scope of.

Claims (10)

1. a kind of power circuit lightning protection circuit module, power line have a plurality of live wire L and mains neutral line N, it is characterised in that bag Include the TSPD lightning-protection modules that are connected in parallel between prime power firestreak L and mains neutral line N and be connected in parallel on rear level power supply fire The 2nd TSPD lightning-protection modules between line L and mains neutral line N, a TSPD lightning-protection modules and the 2nd TSPD lightning-protection modules it Between every power circuit on be in series with the first lightning current frequency impedance control unit, the first lightning current frequency impedance respectively Power circuit is divided into prime circuit and rear class circuit by control unit, respectively in the mains neutral line N and protecting field of front and back stages Switching mode lightning protection component is parallel between line PE, coupling between the protection ground wire PE and working grounding cable GND by protection equipment has Second lightning current frequency impedance control unit.

2. power circuit lightning protection circuit module as claimed in claim 1, it is characterised in that the TSPD lightning-protection module bags The first TSPD lightning protection modules of multiphase corresponding with the power circuit number of phases are included, the first TSPD lightning protection modules of each phase include many sheet resistances TMOV, many sheet resistance TMOV in each phase compose in parallel the first lightning protection major loop.

3. such as claim 2 and described power circuit lightning protection circuit module, it is characterised in that each described resistance TMOV and Individual first Thermal Cutoffs concatenation is connected between mains neutral line N and corresponding power line, and many sheet resistance TMOV in each phase are simultaneously It is associated with indicating circuit.

4. power circuit lightning protection circuit module as claimed in claim 1, it is characterised in that the 2nd TSPD lightning-protection module bags The 2nd TSPD lightning protection modules of multiphase corresponding with the power circuit number of phases are included, the 2nd TSPD lightning protection modules of each phase include at least a piece of electricity Resistance TMOV, the resistance TMOV and a second temperature electric fuse concatenation in each phase are connected in mains neutral line N and corresponding power line Between, to constitute the second lightning protection major loop, the resistance TMOV in each phase is parallel with indicating circuit.

5. the power circuit lightning protection circuit module as described in claim 3 or 4, it is characterised in that each indicating circuit include according to The diode of secondary electric connection, display lamp, resistance, the indicating circuit are series at mains neutral line with corresponding Thermal Cutoffs Between N and corresponding power line, after the indicating circuit is in parallel with corresponding resistance TMOV, mains neutral line N is connected to.

6. power circuit lightning protection circuit module as claimed in claim 5, it is characterised in that the resistance TMOV and indicating circuit With on pcb board, the pcb board and each device epoxy resin encapsulated thereon are encapsulated in a lightning protection module shell.

7. power circuit lightning protection circuit module as claimed in claim 6, it is characterised in that the lightning protection module shell leads to company The pluggable terminals foot and TSPD remote signalling pins of each power line are connect, and leads to every phase TSPD status indicator lamp.

8. power circuit lightning protection circuit module as claimed in claim 6, it is characterised in that opening described in two of front and back stages With the second lightning current frequency impedance control unit string after type lightning protection component in pass is in parallel between property line N and protection ground wire PE in the supply Connection, the lightning protection module shell also lead to the pluggable terminals foot at protection ground wire PE two ends.

9. power circuit lightning protection circuit module as claimed in claim 6, it is characterised in that each resistance TMOV is glued with Remote signalling electric fuse, each remote signalling electric fuse in each phase are parallel-connected to a pair of remote signalling pins on pcb board, this pair of remote signalling pin Monitoring singlechip or monitoring alarm element circuit are connected to, are supervised with the malfunction to the TSPD intelligent lightning protecting modules of every phase Control.

10. a kind of intelligent lightning protection device, it is characterised in that including device case and as described in any one of claim 1-9 Power circuit lightning protection circuit module, the power circuit lightning protection circuit module are installed on described device housing, the power circuit Each pluggable terminals foot or pin of lightning protection circuit module is drawn by device case.