CN206226003U - A kind of power circuit lightning protection and the counterattack of ground potential high pressure suppress protection device - Google Patents
A kind of power circuit lightning protection and the counterattack of ground potential high pressure suppress protection device Download PDFInfo
- Publication number
- CN206226003U CN206226003U CN201620544505.9U CN201620544505U CN206226003U CN 206226003 U CN206226003 U CN 206226003U CN 201620544505 U CN201620544505 U CN 201620544505U CN 206226003 U CN206226003 U CN 206226003U
- Authority
- CN
- China
- Prior art keywords
- lightning
- protection
- high pressure
- counterattack
- ground
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
Suppress protection device the utility model discloses a kind of power circuit lightning protection and the counterattack of ground potential high pressure, the protection circuit is made up of the lightning current frequency impedance device connected in TMOV modular circuits and ground wire on the power line in parallel；The lightning surge voltage that fire etc. and earthing or grounding means are present that cannot normally thread off, causes power frequency short circuit and cause for solving the presence of prior art lightning protection device is strikeed back and the technical problem such as high pressure conduction by lightning protection into will mutually be conducted, disturbed, caused ground potential high pressure during union ground grid along weak ground wire.
Description
Technical field
The utility model belongs to the anti-lightning strike technology of transformer station secondary system power circuit, more particularly to a kind of power circuit is prevented
Thunder and the counterattack of ground potential high pressure suppress protection device.
Background technology
Most of current transformer station secondary system building prevents direct lightning strike using the safety of lightning conductor protection building
To building infringement in itself.And the effect of lightning rod is " drawing thunder ", rather than " lightning-arrest ", particularly lightning rod in order to effectively connect
Dodge thunder and lightning to flow into ground and increase protection domain, that designs is higher than building in itself, therefore more increases electronics in computer room
Equipment is subjected to the risk of LEMP radiation.Its effect is that lightning is guided into itself, and flows into the earth along it, and this is just
Meaning all devices of every access earthed system can all be subject to from outside lightning-protection system, internal lighting protection system (SPD)
The harm of the lightning current high pressure counterattack produced after discharging over the ground.
The strong electromagnetic impulse radiation that thunderbolt is produced when occurring, can cause to transformer station secondary system supply line equipment
Electromagnetic induction forms line surge, causes device damage, and thunder and lightning is mainly invaded passage and includes power circuit, signal line, sets
Standby ground path.Wherein how to lift the lightning protection effect and security of power circuit thunder resisting equipment and how to solve ground potential high pressure
Counterattack turns into new problem.
Because traditional lightning protection box installs breaker in prime in actual use, it is therefore an objective to when lightning protection device failed shorted
Or play power operation when safeguarding and changing.But this method limits lightning protection characteristic and purpose, the standby of lightning protection device can be caused to break
Road device can not be coordinated with lightning protection device and major loop air switch, coordinate, and residual voltage is high, impact resistance ability.The faulty short circuit of traditional SPD or
On fire, SPD heatings, the heat on SPD surfaces is low by point of heat transfer or point heat transfer efficiency, melts low temperature scolding tin and threads off.Elastic force takes off
The factors such as buckle mechanism is easily failed by elastic mechanism, clamping stagnation, melting temperature, manufacturing process are influenceed normally to thread off, and cause power frequency
Short circuit, causes the hidden danger such as fire.This kind of dropout technology cannot simultaneously solve SPD fault trips, hidden danger on fire, puncture open circuit, event
Barrier load trip etc. is required.
The lightning protection of current power circuit is mainly made up of back-up protection air switch and lightning-protection module, standby air switch string
Lightning-protection module prime is associated in, it is main to allow air switch to trip after lightning-protection module failed shorted, allow lightning protection device to depart from power network, prevent
Only catching fire.Main hidden danger has：
1st, because the buying of transformer station secondary system equipment is completed to installation by different departments and producer, perfect lightning protection
System is not implemented generally in transformer station secondary system, there was only one-level lightning-protection module in the rack of part, and lightning protection means are single cannot
Form perfect, system lightning protection system, it is impossible to for the purpose of realizing multi-stage diffluence, amplitude limit, pressure limiting, end-equipment thunderbolt potential safety hazard
Seriously.
2nd, traditional lightning protection device is coordinated by mechanical trip failure, lightning protection device air switch with lightning protection device, major loop breaker
Problem causes lightning protection device failure on fire or system trip.
Traditional lightning protection device installs breaker in prime in actual use, it is therefore an objective to when lightning protection device failed shorted or dimension
Shield plays power operation when changing.But this method limits lightning protection characteristic and purpose, the back-up breaker of lightning protection device can be caused
Can not coordinate with lightning protection device and major loop air switch, coordinate, residual voltage is high, impact resistance ability.Because the short-circuiting device of distribution system is matched somebody with somebody
Put and completed by two part (producer) segmentations with the breaker type selecting in thunder resisting equipment, the breaker of lightning protection device prime cannot be tolerated
The impact of large lightning current, therefore lightning protection device breaker limits the discharge current ability of lightning protection device, does not send out the effect of lightning protection device
Wave maximum.According to professional standard, the maximum series connection 100A breakers of 100kA lightning protection devices prime, when actual measurement impacts 50-60kA,
Breaker just trips, and lightning protection device exits protection.Because the maximum current value for loading air switch is fixed, cause load air switch, lightning protection empty
Open, lightning protection device hardly possible is matched.Tripped during the small lightning protection of lightning protection air switch；Big load trip, power cut-off.Separately, traditional SPD is faulty
Short-circuit or on fire, SPD heatings, the heat on SPD surfaces makes low temperature scolding tin melt dropout by point of heat transfer (point heat transfer efficiency is low).Bullet
The factors such as power tripping mechanism is easily failed by elastic mechanism, clamping stagnation, melting temperature, manufacturing process are influenceed normally to thread off, and are caused
Power frequency short circuit, causes the hidden danger such as fire.This kind of dropout technology cannot simultaneously solve SPD fault trips, on fire, load fault tripping operation
It is required that.
The ground wire of current transformer station computer room, is mainly included that thunder proof protection ground (PE) and electric wire are grounded by function classification
(GND) two class.Lightning proof ground：Refer to the device that by-pass shunt passage is provided for the power circuit of equipment or system, signal line, will
Thunder and lightning overvoltage in circuit is shunted, shifted over the ground；Its cable for connecting over the ground is lightning protection line.Protecting field：Avoid
AC and DC power supply line constitutes a threat to equipment and the person, and the not charged metal chassis in equipment are connected to the ground, when occur electric leakage or
When casing is powered, it is ensured that personal safety.Two classes ground in ideal should it is separate, do not interfere with each other, or each own independent connect
Earth mat, especially accurate terminal device can not be influenceed by lightning protection ground potential, otherwise have the danger of high pressure counterattack.But it is existing
Use conbined earthing system in earthing mode, will all ground wires (lightning proof ground, protecting field) be connected on one piece of bus-bar, pass through
Downlead is connected with earth mat.Existing earthing mode has following defect and deficiency：
1st, influenced each other between earthed system, grounding apparatus.Because the ground wire for connecing by force and weakly is all by same remittance
Flow row concurrent, the mode of common network carry out joint grounding, even if therefore earth resistance reaches standard, both influences each other also very
Greatly, especially lightning surge voltage by lightning protection enter union ground grid when will along weak ground wire (equipment ground line, work
Ground wire) mutually conducted, disturbed, causing ground potential high pressure to strike back 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, arrester introduce thunderbolt
After electric current, moment is too high to equipment formation voltage difference by ground potential, 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, signal system, metal
The systems such as pipeline, cause equipment to strike back and damage.Traditional method is as far as possible to reduce system earth resistance, 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
In high impedance, induction reactance (unless being connected using superconducting conductor) between cable, voltage difference can be formed under heavy current impact effect, therefore should
Method cannot solve ground potential counterattack.
Utility model content：
The technical problems to be solved in the utility model：A kind of power circuit lightning protection is provided and the counterattack of ground potential high pressure suppresses to protect
Protection unit, solving cannot normally the threading off of prior art lightning protection device presence, causes power frequency short circuit and causes fire etc. and connect
Ground device exist lightning surge voltage by lightning protection into during union ground grid will along weak ground wire carry out mutually conduct,
Disturb, cause the technical problems such as ground potential high pressure is strikeed back and high pressure is conducted.
Technical solutions of the utility model：
A kind of power circuit lightning protection and the counterattack of ground potential high pressure suppress protection device, and the protection circuit is by being connected in parallel on power supply
The lightning current frequency impedance device composition connected in TMOV modular circuits and ground wire on line.
On the ground wire connect lightning current frequency impedance device be connected on protective grounding PE and electric wire ground connection GND it
Between.
The TMOV modular circuits are that alloy type Thermal Cutoffs F1 and Zinc-oxide piezoresistor MOV are composed in series anti-mistake
Pressure, overheat and excessively stream protection circuit, be pasted with the Zinc-oxide piezoresistor MOV a normally closed Thermal Cutoffs F2 and
One NTC themistor that impedance changes to temperature change, the TMOV modular circuits be encapsulated in one it is fire-retardant outer
In shell.
The lightning current frequency impedance device be by the nanocrystalline magnetic core material with the Frequency Synchronization of lightning current, magnetic core outer shell and
Enamel insulated wire coiling is formed, and working frequency range and suppression impedance are between 100hz-1Mhz.
The protection circuit of zero line and 1 phase line plus zero line is added for 3 phase lines of AC power plant：First phase
, respectively with zero line is connected to after the TMOV modular circuits parallel connection of more than 2, zero line connects with protection for line, the second phase line, third phase line
Connected with switching-type device between ground wire, connected with lightning current frequency impedance controller between protective grounding and electric wire earth terminal
Connect, protective grounding termination the earth, electric wire connects protecting field and place of working.
Three phase lines and zero line of AC power plant add the guarantor of ground connection, phase line and zero line plus electric wire ground connection that connects wires
Protection circuit：Every phase line and zero line with thunder proof protection ground line is connected to after the TMOV modular circuits parallel connection of more than 2, are protected respectively
Connected with lightning current frequency impedance controller between shield grounding terminal and electric wire earth terminal, protective grounding line end grounded screen, electric wire
Connect protecting field and place of working.
The protection circuit of alterating and direct current source device is respectively between phase line and zero line or between power positive end and power supply negative terminal；
Between phase line and protective grounding or between power positive end and protective grounding；Between zero line and protective grounding or power supply negative terminal with
TMOV modular circuits between protective grounding with more than 2 are in parallel, between protective grounding and electric wire earth terminal with lightning current frequently
Rate impedance controller is connected, and protective grounding termination the earth, electric wire connects protecting field and place of working.
The beneficial effects of the utility model：
Every TMOV modular circuit of the utility model is connected one by a major loop 40kA alloy-type temperature fuse
40kA piezoresistors are lightning protection major loop, are protected by a temperature for playing status monitoring function being fitted on piezoresistor
The NTC for playing temperature monitoring that dangerous silk and one are fitted on piezoresistor constitutes supervisory circuit and draws welding pin, in real time
Working condition to TMOV and 40kA alloy-type temperature fuses is monitored, and exports analog signal to alarm mechanism, realizes
Real-time monitoring and control, has in the plastic housing of flame-retarding characteristic by packaging technology epoxy sealing of fitting at one, forms an electricity
Minor excessively stream, overvoltage, the intelligent lightning protecting protection device of overheat tripping function.Wherein 40kA alloy-type temperature fuses possess 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
The power system failure that MOV is on fire or short circuit causes；The fusing point and major loop Thermal Cutoffs of monitoring function Thermal Cutoffs
Unanimously, the febrile state to major loop Thermal Cutoffs is monitored, and transmits a signal to alarm mechanism；And built-in temperature prison
The NTC of survey, according to different temperature changes, exports a different dynamic analog signal in the case where piezoresistor generates heat
To alarm mechanism；
The utility model TMOV lightning-protection modules are the condensates of alloy-type temperature fuse and piezo-resistance, with excessively electric
Pressure, overcurrent and overheat multiple protection functions, built-in Thermal Cutoffs can be rapid from circuit after can ensure that pressure responsive resistor failure
Middle disengaging, the response time is fast, can be prevented effectively from latent fire hazard；
The utility model uses TMOV lightning-protection modules, can in systems in practice omit lightning protection air switch, meets distribution and prevents
Thunder dash current requires, is required without disaster hidden-trouble etc. that solution power frequency heavy-current open circuit is threaded off, generate heat dropout, heavy current impact, phase
The function such as mutual backup and remote signalling monitoring.After certain TSPD fails, remaining TSPD still can be used normally, 2 SPD systems tools
Standby mutual backup functionality, more protection equipments；
The utility model lightning current frequency impedance controller be it is a kind of with lightning current frequency change and impedance changes
Particular device, is under normal circumstances conducting state in series connection earth-return circuit, it is ensured that the normal safety ground connection of equipment, in direct current
Or under power current be Low ESR unit；When earthed system has thunder and lightning overvoltage, in the presence of thunder and lightning frequency, instant response is
The unit of high impedance, counterattack of the blocking thunder and lightning to equipment.Due to the low-impedance path characteristic of electric current, lightning current can only be toward low resistance
The earth mat of value is released.After the completion of lightning current is by earth mat diffusing, thunder and lightning frequency impedance controller returns to Low ESR shape again
State.
Lightning current frequency impedance controller is by can be with the Modern Nanocrystalline core material and enamel-cover of the Frequency Synchronization of lightning current
Line coil is constituted, and the working frequency range of magnetic core and suppression impedance, can be to the lightning current frequencies in the range of this between 100Hz-1MHz
Different suppression impedances are played, realized suppressing thunder and lightning frequency impedance, isolated.Various lightning waveforms to more than 99% hinder
It is disconnected, the electric current unrestraint effect to direct current and power frequency 50Hz.
The utility model using TMOV modules with and ground wire on connect the lightning current frequency resistance of (PE and GND ground between)
Anti- controller composition.Realize that power circuit lightning protection and the counterattack of earthed system high pressure suppress to protect simultaneously.
The utility model feature：
The built-in safeties of TMOV, series connection air switch can be cancelled in application, ensure that maximum through-current capability is continuous
The ability that need to be disconnected with failure power frequency short circuit current is opened, protective capacities and security is improved；Built-in major loop safety position prison
Survey and the output of NTC temperature-monitoring functions, realization is monitored to the every on off operating mode of TMOV, temperature, obtains real-time dynamic
Analog signal, reduces maintenance cost.
Lightning current frequency impedance controller of being connected and protecting field (GND) end between is held in earth mat (PE), when lightning current invasion
When ALFB moments in big impedance device, and the impedance is certain to be more than earth resistance impedance, according to current characteristics (electric current
Walk low-impedance path), force lightning current to realize big resistance eutral grounding technology toward the earth mat earial drainage smaller than his impedance, electric discharge.
The lightning proof ground for being grounded system is separated with protecting field, makes two ground references separate, is not done mutually when having Lightning disturbance
Disturb, eliminate ground potential counterattack, conduction of the isolation lightning current to protecting field equipment.
Both are fused into new lightning protection circuit and realize the effect blocked to power circuit shunting, pressure limiting and earth mat counterattack
Really, the degree of protection and security of equipment, lifting means lightning protection effect are improve.
The utility model solves cannot normally threading off, causing power frequency short circuit and cause for prior art lightning protection device presence
The lightning surge voltage that fire etc. and earthing or grounding means are present will be entered into during union ground grid by lightning protection along weak ground wire
Row mutually conducts, disturbs, causing the technical problems such as ground potential high pressure is strikeed back and high pressure is conducted.
Brief description of the drawings：
Fig. 1 is the utility model TMOV structural representations；
Fig. 2 is lightning current frequency impedance controller schematic diagram；
Fig. 3 is lightning current frequency impedance controller curve map in the utility model embodiment；
Fig. 4 is the utility model three-phase alternating current system 4+0 protection circuit structural representations；
Fig. 5 is the utility model one-phase AC-system 2+0 protection circuit structural representations；
Fig. 6 is the utility model three-phase alternating current system 3+1 protection circuit structural representations；
Fig. 7 is the utility model one-phase AC-system 1+1 protection electrical block diagram；
Fig. 8 is the utility model power of alterating and direct current system protection circuit structural representation.
Specific embodiment：
A kind of power circuit lightning protection and the counterattack of ground potential high pressure suppress protection device, and the protection circuit is by being connected in parallel on power supply
In TMOV modular circuits and ground wire on line connect lightning current frequency impedance device composition, realize power circuit lightning protection and
The counterattack of earthed system high pressure suppresses to protect simultaneously.
On the ground wire connect lightning current frequency impedance device be connected on protective grounding PE and electric wire ground connection GND it
Between.
The every TMOV modular circuits are that alloy type Thermal Cutoffs F1 and Zinc-oxide piezoresistor MOV are composed in series
The protection circuit of anti-overvoltage, overheat and excessively stream, is pasted with a normally closed Thermal Cutoffs on the Zinc-oxide piezoresistor MOV
F2 and NTC themistor that impedance changes to temperature change, the TMOV modular circuits are encapsulated in a resistance
In combustion shell 1, realize that the on off operating mode to TMOV, temperature are monitored, obtain real-time dynamic analog signal, inflaming retarding shell 1
Inside it is filled with flame-retardant heat conduction material 2.
Every TMOV circuit is by major loop 40kA alloy-type temperature fuses F1 one Zinc-oxide piezoresistor of series connection
MOV is lightning protection major loop, is fitted by a status monitoring function Thermal Cutoffs F2 being fitted on piezoresistor and one
The NTC themistor composition supervisory circuit of the temperature monitoring on piezoresistor simultaneously draws welding pin, in real time to MOV and
The working condition of 40kA alloy-type temperature fuses is monitored, and exports analog signal to alarm mechanism.Encapsulated by fitting
Technique epoxy sealing has in the plastic housing of flame-retarding characteristic at one, forms an electronic type excessively stream, overvoltage, overheat tripping function
Intelligent lightning protecting protection device, wherein 40kA alloy-type temperature fuses possess tolerance maximum 8/20us thunder-strike currents 40kA and impact
Do not turn off, be provided simultaneously with the disconnection of power frequency 250V/50Hz/60A short circuit currents, prevent MOV on fire or power supply system that short circuit causes
System failure；The fusing point of monitoring function Thermal Cutoffs is consistent with major loop Thermal Cutoffs, to the hair of major loop Thermal Cutoffs
Warm status are monitored, and transmit a signal to alarm mechanism；And the feelings that the NTC of built-in temperature monitoring generates heat in piezoresistor
Under condition, according to different temperature changes, one different dynamic analog signal of output to alarm mechanism.
The lightning current frequency impedance device is by the nanocrystalline magnetic core material 4 with the Frequency Synchronization of lightning current, magnetic core outer shell 3
The system of enamel insulated wire 5 is formed, and working frequency range and suppression impedance are between 100hz-1Mhz.
Knowable to following table, when thunder and lightning frequency reaches 1MHz, each lightening pulse energy has concentrated more than 99%.With 8/20us
As a example by impulse waveform, energy 73.37% is concentrated in 100kHz, energy 90% is concentrated in 183kHz, energy is concentrated in 1MHz
99.87%, the thunder energy characteristic of 100Hz-1MHz can be synchronously isolated using multiple-pulse thunder and lightning synchronization isolator, you can blocking
99% ground potential high pressure counterattack, realizes the protection of above earth potential counterattack.
Lightning wave relative energy accumulation frequency spectrum W (ω)
Because the energy of lightning current increases sharply since 10kHz, to 1MHz accumulations to the 99.87% of whole energy, therefore, thunder
The impedance design of power frequency impedance controller is also, according to this impedance operator, 30k Ω to be reached in 100kHz impedances,
300kHz reaches 20k Ω, and thunder energy is accumulated between 100kHz-200kHz, and the maximum of lightning current frequency impedance controller
Then between 100kHz-300kHz, impedance operation curve and thunder energy frequency are adapted to automatically for impedance, and the energy of thunder and lightning is maximum
The synchronous isolation of limit, pressure is released over the ground, so that protection equipment (see Fig. 3).
The working frequency range of Modern Nanocrystalline core material 4 and suppression impedance, can be in the range of these between 100Hz-1MHz
Lightning current frequency play different suppression impedances, realize suppressing thunder and lightning frequency impedance, isolation.To more than 99% various thunders
Hit waveform to be blocked, the electric current unrestraint effect to direct current and power frequency 50Hz.The impedance of thunder and lightning frequency impedance controller can root
Calculated according to RL=2 π fL formula, its f is lightning current dynamic frequency.Frequency range determines that L is inductance, π by the unique material of magnetic core
It is pi.
Operation principle：When power circuit has Lightning disturbance, TMOV module moments on power circuit are connected in parallel on by thunder and lightning
Flow and put to big ground PE ends, when there is Lightning disturbance at PE ends, frequency of the lightning current frequency impedance controller according to invasion lightning current
100Hz-1MHz changes and changes itself internal resistance and formed with individual high resistant resistant to device, due to the low-impedance path characteristic of electric current, forces
Lightning current can only be toward the earth mat shunting on earth resistance ground, so as to realize height of the earth mat protective grounding PE ends to electric wire ground connection GND ends
Pressure counterattack.By the comparing of test model, it is 5% to flow through the counterattack electric current of thunder and lightning frequency impedance controller, illustrates 95%
Lightning current all isolated by thunder and lightning frequency impedance controller, realize high pressure counterattack suppression.In real work, thunder and lightning frequency
The lower end of impedance controller is ground connection, and the impedance of its kilo-ohm of level substantially exceeds the impedance of the Europe of earth mat hundred level, adds joint earth mat
Diffusing effect, therefore flow through the moment counterattack electric current very little of thunder and lightning frequency impedance controller, lightning current can only flow to earth mat, demonstrate,prove
The effect that real high pressure counterattack suppresses, so that lightning proof ground becomes unique thunder and lightning leakage path, also specification earthed system.
Effectively solve harm of the ground potential counterattack to system equipment.
3 phase lines L1, L2, L3 for AC power plant are electric plus the protection of zero line N plus zero line N and 1 phase line L
Road：First phase line L1, the second phase line L2, third phase line L4 after the parallel connection of the TMOV modular circuits of more than 2 respectively with being connected to zero
Connected with switching-type device between line N, zero line N and protective grounding PE lines, used between protective grounding PE ends and electric wire ground connection GND ends
Lightning current frequency impedance controller is connected, and protective grounding PE termination the earth, electric wire ground connection GND connects protecting field and place of working.
Three phase lines and zero line of AC power plant connect plus connect wires ground connection GND, phase line L and zero line N plus electric wire
The protection circuit of ground GND：Every phase line and zero line N are protected with being connected to lightning protection after the parallel connection of the TMOV modular circuits of more than 2 respectively
Shield ground wire PE, is connected between protective grounding line PE ends and electric wire ground connection GND ends with lightning current frequency impedance controller, and protection connects
Ground wire PE terminates earth mat, and electric wire ground connection GND connects protecting field and place of working.
The protection circuit of alterating and direct current source device respectively between phase line L and zero line N or power positive end+with power supply negative terminal-
Between；Between phase line L and protective grounding PE or between power positive end+and protective grounding PE；Zero line and protective grounding PE it
Between or power supply negative terminal and protective grounding PE between it is in parallel with the TMOV modular circuits of more than 2, protective grounding PE ends connect with electric wire
Connected with lightning current frequency impedance controller between ground GND ends, protective grounding PE termination the earth, electric wire ground connection GND connects protecting field
And place of working.
Claims (4)
1. a kind of power circuit lightning protection and the counterattack of ground potential high pressure suppresses protection device, it is characterised in that：The protection circuit by
The lightning current frequency impedance device composition connected in TMOV modular circuits and ground wire on the power line in parallel.
2. a kind of power circuit lightning protection according to claim 1 and the counterattack of ground potential high pressure suppresses protection device, its feature
It is：The lightning current frequency impedance device connected on the ground wire is with being connected on PE and GND between.
3. a kind of power circuit lightning protection according to claim 1 and the counterattack of ground potential high pressure suppresses protection device, its feature
It is：The TMOV modular circuits be alloy type Thermal Cutoffs F1 and Zinc-oxide piezoresistor MOV be composed in series it is anti-overvoltage,
The protection circuit of overheat and excessively stream, is pasted with a normally closed Thermal Cutoffs F2 and on the Zinc-oxide piezoresistor MOV
The NTC themistor that the individual impedance to temperature change changes, the TMOV modular circuits are encapsulated in an inflaming retarding shell
It is interior.
4. a kind of power circuit lightning protection according to claim 1 and the counterattack of ground potential high pressure suppresses protection device, its feature
It is：The lightning current frequency impedance device be by can with the nanocrystalline magnetic core material of the Frequency Synchronization of lightning current, magnetic core outer shell and
Enamel insulated wire coiling is formed, and working frequency range and suppression impedance are between 100hz-1Mhz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620544505.9U CN206226003U (en) | 2016-06-07 | 2016-06-07 | A kind of power circuit lightning protection and the counterattack of ground potential high pressure suppress protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620544505.9U CN206226003U (en) | 2016-06-07 | 2016-06-07 | A kind of power circuit lightning protection and the counterattack of ground potential high pressure suppress protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206226003U true CN206226003U (en) | 2017-06-06 |
Family
ID=58780586
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620544505.9U Active CN206226003U (en) | 2016-06-07 | 2016-06-07 | A kind of power circuit lightning protection and the counterattack of ground potential high pressure suppress protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206226003U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105846416A (en) * | 2016-06-07 | 2016-08-10 | 贵州电网有限责任公司电力科学研究院 | Lightning prevention and ground potential high-voltage counterattack suppression protection circuit of power line |
| CN110071399A (en) * | 2019-06-04 | 2019-07-30 | 南京信息工程大学 | A kind of intelligent socket with lightning protection function |
| CN110401045A (en) * | 2019-07-04 | 2019-11-01 | 云南电网有限责任公司丽江供电局 | A kind of route defense sector potential counterattack Special grounding device |
| CN113949051A (en) * | 2021-10-08 | 2022-01-18 | 国网黑龙江省电力有限公司伊春供电公司 | Cable metal sheath circulating current restraining device and method |
| CN114002548A (en) * | 2021-10-29 | 2022-02-01 | 沈阳铁路信号有限责任公司 | Lightning protection monitoring method and system with evaluation function |
| TWI771754B (en) * | 2020-09-11 | 2022-07-21 | 張丞輝 | Distribution joint box protector |
-
2016
- 2016-06-07 CN CN201620544505.9U patent/CN206226003U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105846416A (en) * | 2016-06-07 | 2016-08-10 | 贵州电网有限责任公司电力科学研究院 | Lightning prevention and ground potential high-voltage counterattack suppression protection circuit of power line |
| CN110071399A (en) * | 2019-06-04 | 2019-07-30 | 南京信息工程大学 | A kind of intelligent socket with lightning protection function |
| CN110401045A (en) * | 2019-07-04 | 2019-11-01 | 云南电网有限责任公司丽江供电局 | A kind of route defense sector potential counterattack Special grounding device |
| TWI771754B (en) * | 2020-09-11 | 2022-07-21 | 張丞輝 | Distribution joint box protector |
| CN113949051A (en) * | 2021-10-08 | 2022-01-18 | 国网黑龙江省电力有限公司伊春供电公司 | Cable metal sheath circulating current restraining device and method |
| CN114002548A (en) * | 2021-10-29 | 2022-02-01 | 沈阳铁路信号有限责任公司 | Lightning protection monitoring method and system with evaluation function |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206226003U (en) | A kind of power circuit lightning protection and the counterattack of ground potential high pressure suppress protection device | |
| CN104617571B (en) | A kind of electronic electric equipment over-voltage and over-current protector | |
| US10944252B2 (en) | Surge protection device | |
| CN107731635A (en) | A kind of standby breaker protector for surge protector | |
| CN103683225B (en) | Nuclear power station low-voltage distribution system full supply district earth-fault protection method | |
| CN101350514A (en) | Current-limiting arc-extinguishing shunted exciter tripping type earthing short circuit protection device | |
| CN201210614Y (en) | Residual current controlling and monitoring protector | |
| CN105048437B (en) | A kind of combined type neutral ground composite control apparatus | |
| CN107863765A (en) | Improve arc current transfevent AC fault current limiter and current-limiting method | |
| CN208209520U (en) | A kind of active power lightning protection Duplicate protective box | |
| CN105846416A (en) | Lightning prevention and ground potential high-voltage counterattack suppression protection circuit of power line | |
| CN206076936U (en) | A kind of power circuit lightning protection circuit module and intelligent lightning protection device | |
| CN208890344U (en) | A kind of protection circuit and electronic equipment | |
| RU2619777C2 (en) | Device for protection of electrical consumers from overvoltage in single-phase ac networks | |
| CN207426664U (en) | Voltage detection type earth leakage protective device | |
| CN106129992A (en) | A kind of lightning protection for power supply target formula back-up protection circuit | |
| CN209282645U (en) | Protection type high pressure compensation cabinet | |
| CN109217238B (en) | Protection circuit and electronic equipment | |
| CN201478826U (en) | Matrix type lightning surge protector | |
| CN204230854U (en) | Siganl thunder-proof device | |
| CN206293872U (en) | A kind of SPD back-up protection devices based on electromagnetic differential | |
| CN205123244U (en) | Surge protector | |
| CN203811749U (en) | Single-phase ground fault monitoring device for non-grounded system | |
| CN107611956A (en) | A kind of small high voltage switch cubicle | |
| CN102412509B (en) | Contact network overvoltage protection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220427 Address after: No.17 Binhe Road, Nanming District, Guiyang City, Guizhou Province Patentee after: Guizhou Power Grid Co.,Ltd. Address before: 550002 No. 32, Jiefang Road, Guizhou, Guiyang Patentee before: ELECTRIC POWER RESEARCH INSTITUTE, GUIZHOU POWER GRID Co.,Ltd. Patentee before: Shenzhen leibosi Technology Co., Ltd |