CN206673575U - A kind of over-pressed protection module and electrical equipment - Google Patents
A kind of over-pressed protection module and electrical equipment Download PDFInfo
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- CN206673575U CN206673575U CN201720396716.7U CN201720396716U CN206673575U CN 206673575 U CN206673575 U CN 206673575U CN 201720396716 U CN201720396716 U CN 201720396716U CN 206673575 U CN206673575 U CN 206673575U
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Abstract
A kind of over-pressed protection module and electrical equipment, over-pressed protection module include the thermistor of solid discharging tube, piezo-resistance and positive temperature coefficient, wherein：The electrode of the electrode of the first surface of the thermistor valve block and the first surface of the varistor valve is electrically connected the output pin to form module, input pin of the electrode of the second surface of the thermistor valve block as module, the second surface of the first electrode of the solid discharging tube and the varistor valve is electrically connected, the common pin of the second electrode of the solid discharging tube as module.This protection module has abandoned traditional intrinsic simple piezo-resistance lightning protection thinking, limitation of the maximum working voltage to piezo-resistance operation voltage is breached using the thinking of new " clamps " and " switching device " hybrid protective, thunderbolt residual voltage is significantly reduced, the circuit sensitive to rear class provides the protection level of fully safety.
Description
Technical field
Power supply overvoltage protection technical field is the utility model is related to, is set more particularly to a kind of over-pressed protection module and electricity consumption
It is standby.
Background technology
Thunderbolt overvoltage is often invaded the power supply of equipment in a manner of cable conduction or electromagnetic induction by low-voltage power supply cable
Port, over-voltage and over-current is caused to impact the component of power unit, therefore the power port of nearly all electrical equipment is all taken
A certain degree of lightning protection measures, resist the threat of this thunderbolt overvoltage.Most typical lightning protection measures are to use a zinc oxide
Piezo-resistance (Metal Oxide Varistor, hereinafter referred to as：MOV power port both ends) are connected in parallel on, being released with bypass, it is electric to be struck by lightning
Stream, while the rise of the non-linear I-V characteristic suppression thunderbolt voltage using piezo-resistance, the component of protection power source port.This
The simple Lightning Protection of kind is applicable for most equipment, safety, but not all devices can use so
Simple Lightning Protection because circuit topological structure it is different power supply type it is widely different to the tolerance level of transient overvoltage, than
As eliminate the various voltage raising and reducing circuits of high-voltage energy storage capacitor to thunderbolt overvoltage just it is quite sensitive, it is necessary to use the two-stage of complexity
Even three-level lightning protection circuit effectively suppresses residual voltage of being struck by lightning.
Traditional lightning protection circuit is protected only with the clamper type lightning protection component (i.e. piezo-resistance) of single kind, due to
The direct current operation voltage of piezo-resistance can not be reduced arbitrarily, therefore reduce by the requirement and limitation of equipment maximum working voltage
The unique channel for residual voltage of being struck by lightning is exactly to reduce the thunder-strike current density of piezo-resistance, such as the diameter of increase piezo-resistance or increasing
Add the series of lightning Protection circuit, the thunder-strike current density of final stage piezo-resistance can be reduced.But to same action voltage
Piezo-resistance for, even if Ф 10 piezo-resistance to be replaced with to Ф 20 piezo-resistance, its thunder-strike current density is also only
4~5 times of difference (i.e. 4~5 times of the piezo-resistance brush silver area that the silver-colored area of brush of Ф 20 piezo-resistance is about Ф 10), this
Thunderbolt residual voltage difference very little caused by kind thunder-strike current difference.For example 3KV 1.2/50uS is struck by lightning voltage 10D51IK's
The dash current density formed in piezo-resistance is about 2KA/cm2, thunderbolt residual voltage is about 1000Vp；If 10D511K is changed
For 20D511K, then dash current density is reduced to 500A/cm2, thunderbolt residual voltage will be 800Vp, that is to say, that even if by pressure-sensitive electricity
The valve block diameter of resistance increases 1 times, and thunderbolt residual voltage can only also reduce about 20%.Therefore the thunder-strike current for only reducing piezo-resistance is close
Degree, thunderbolt residual voltage can not significantly be reduced.
Restricted by equipment maximum working voltage, the direct current operation voltage of the piezo-resistance in traditional schemes of prevention against lightning can not
Arbitrarily reduce, be 220V for declared working condition conditionACFor ± 30% equipment, the operation voltage of lightning protection piezo-resistance needs greatly
In 490VDC, generally 510V is selected in practical applicationDCThe piezo-resistance of operation voltage carries out lightning protection, to conventional small-sized pressure-sensitive electricity
Resistance 10D511K (i.e. a diameter of 10mm pressure sensitive voltages are 510VDC) is tested, and its residual voltage under different thunder-strike currents is horizontal
It is as shown in the table：
Test shows above, using traditional simple piezo-resistance lightning Protection Design, that is, allows to final stage piezo-resistance
Thunder-strike current be suppressed to 50~100A level, its residual voltage of being struck by lightning can also reach 800Vp level above, and thunderbolt residual voltage ratio exists
1.6~2.0 level.It can be seen that the scheme of the simple piezo-resistance lightning protection of traditional dependence, maximum factor is restricted to thunderbolt residual voltage
It is exactly the operation voltage of piezo-resistance.
Utility model content
The utility model purpose is to provide a kind of over-pressed protection module, it is intended to solves traditional piezo-resistance lightning Protection Design
The problem of opposition contradiction that the insurmountable piezo-resistance leakage current of scheme is bigger than normal and piezo-resistance output residual voltage is higher.
The utility model provides a kind of over-pressed protection module, including solid discharging tube, piezo-resistance and positive temperature coefficient
Thermistor, the valve block of the valve block of the thermistor and the piezo-resistance is respectively provided with two relative surface electrodes, its
In：
The first surface electrode of the thermistor valve block is led with the first surface electrode of the varistor valve with height
Thermal conductivity isoelectric substance is electrically connected, and draws the output pin of module；The second surface electrode of the thermistor valve block is as mould
The input pin of block；The first electrode of the solid discharging tube and the second surface electrode of the varistor valve electrically connect
Connect, the common pin of the second electrode of the solid discharging tube as module.
Preferably, in addition to a capacitor, the capacitor are connected with the piezo-resistance parallel coupled electrical.
In one embodiment, in addition to high heat conduction encapsulated layer, the high heat conduction encapsulated layer is by the solid discharging tube, pressure
In quick resistance and thermistor are encapsulated in.
Preferably, the first electrode of the solid discharging tube and the second surface electrode of the varistor valve electrically connect
Connect, and the solid discharging tube is close to the second surface electrode of the varistor valve.
In another embodiment, in addition to high heat conduction encapsulated layer and a metal extraction electrode, the high heat conduction encapsulated layer
The piezo-resistance and thermistor are encapsulated in interior, the second surface of the metal extraction electrode and the varistor valve
Electrode is electrically connected and at least partly exposes to the high heat conduction encapsulated layer.
Preferably, the first electrode of the solid discharging tube and the exposed parts of the metal extraction electrode are electrically connected.
Preferably, the high heat conduction encapsulated layer is silicone resin layer.
Preferably, the output pin is located at the first surface electrode of the thermistor valve block and the piezo-resistance valve
Part between the first surface electrode of piece is flat.
Preferably, the solid discharging tube is that TSS manages (Thyristor Surge Suppressor, voltage switch type wink
State suppresses diode).
The utility model additionally provides a kind of electrical equipment, has live wire input terminal, zero line input terminal and load electricity
Road, including above-mentioned over-pressed protection module, wherein, input pin, output pin and the common pin of the over-pressed protection module
Sequentially it is electrically connected respectively with the live wire input terminal, load circuit and zero line input terminal.
Above-mentioned over-pressed protection module abandons intrinsic traditional lightning protection thinking, using new " clamps " and " derailing switch
The thinking of part " hybrid protective, limitation of the maximum working voltage to piezo-resistance operation voltage is breached, it is residual effectively to reduce thunderbolt
Pressure, the circuit sensitive to rear class provide the protection level of fully safety.
Brief description of the drawings
Fig. 1 is the application schematic diagram of over-pressed protection module in the utility model embodiment；
Fig. 2 is the circuit structure diagram of over-pressed protection module in the utility model first embodiment；
Fig. 3 is the structural representation of over-pressed protection module in the utility model first embodiment；
Fig. 4 is the structural representation of over-pressed protection module in the utility model second embodiment；
Fig. 5 is " piezo-resistance+discharge tube " mixed type lightning protection circuit structure chart in the utility model first embodiment；
Fig. 6 is TSS pipe VA characteristic curve figures；
Fig. 7 is the circuit structure diagram of over-pressed protection module in the utility model second embodiment.
Embodiment
In order that the technical problems to be solved in the utility model, technical scheme and beneficial effect are more clearly understood, below
With reference to drawings and Examples, the utility model is further elaborated.It should be appreciated that specific implementation described herein
Example only to explain the utility model, is not used to limit the utility model.
Referring to Fig. 1, the over-pressed protection module 10 in preferable embodiment, it can be applicable to AC electric equipment
On, it is generally located between power port (not shown) the backend load circuit 50 of electrical equipment (not shown), to load circuit
50 carry out overvoltage protection.Input pin 11 of the over-pressed protection module 10 with electrical power source port live wire input terminal Li,
The output pin 12 of electrical connected load circuit 50 and connection power port zero line input terminal N common pin 13.
Specifically, Fig. 2 and 3 are referred to, over-pressed protection module 10 includes positive temperature coefficient (Positive Temperature
Coefficient, PTC) thermistor 14, piezo-resistance 15 and solid discharging tube 16, the valve block of thermistor 14 has two
Individual relative surface, and two electrodes are drawn respectively from two relative surfaces；The valve block of piezo-resistance 15 also has two phases
To surface, and also draw two electrodes respectively from two relative surfaces.
Wherein, the first surface electrode of the valve block of thermistor 14 is close to simultaneously with the first surface electrode of the valve block of piezo-resistance 15
It is electrically connected with high heat-conductivity conducting material, and draws the output pin 12 of module 10, output pin 12 is metal electrode, itself and heat
The first surface electrode of the quick valve block of resistance 14 and/or the first surface electrode welding of the valve block of piezo-resistance 15, wherein high heat conduction thing
Matter 17 is high silver content tin cream, such as silver content more than 3.5%.The second surface electrode of the valve block of thermistor 14 is as module 10
Input pin 11, it can draw metal electrode, can also be not brought up；The first electrode of solid discharging tube 16 and piezo-resistance 15
The second surface electrical connection (as weld) of valve block, the common pin 13 of the second electrode of solid discharging tube 16 as module 10,
It can draw metal electrode, can also be not brought up.Form " the three-in-one composite protective module " of three pins.
In one embodiment, referring to Fig. 3, over-pressed protection module 10 utilizes high heat conduction sealing resin by solid discharging tube
16th, in piezo-resistance 15 and thermistor 14 are encapsulated in so that outside input pin 11, output pin 12 and the part of common pin 13
Dew.In this way, " the three-in-one composite protective module " of total incapsulation is by thermistor 14, piezo-resistance 15 and solid discharging tube 16 3
Element is welded and encapsulated together back-to-back, heat is quickly conducted between three elements, and three elements form one
The individual entirety for absorbing heat, its " equivalent thermal capacity " is increased substantially for discrete component, therefore overvoltage is anti-
The ability that shield module 10 absorbs thunderbolt pulse energy is effectively strengthened.Under the thunderbolt impulse action of large energy, if mistake
The operating temperature that the energy that pressure protection module 10 absorbs makes its temperature exceed thermistor 14, the resistance of the meeting of thermistor 14
It can also quickly increase, suppress the pulse current of over-pressed protection module 10 automatically, be pressed down the thunderbolt temperature rise of over-pressed protection module 10
System also corresponds to enhance the pulse energy tolerance level of thunder strike circuit within relatively low safe temperature range.
In the embodiment, the first electrode 161 of solid discharging tube 16 and the second surface electrode electricity of the valve block of piezo-resistance 15
Gas connects, the connected mode specifically welded.And solid discharging tube 16 is close to the second surface electricity of the valve block of piezo-resistance 15
Gas, resin filling is entered if having gap between the two, improves heat conduction efficiency between the two.
Preferably, the surface electrode of the surface electrode of the valve block of thermistor 14 and the valve block of piezo-resistance 15 is by silver coating shape
Into for improving heat transfer and electrical efficiency.In addition, it is similarly raising heat conduction efficiency, the surface of the valve block of thermistor 14
The opposite face of the surface electrode of electrode and the valve block of piezo-resistance 15 is set.For further shorten heat and conductive conduction time and
Path, output pin 12 is located to the first surface electricity of the first surface electrode and the valve block of piezo-resistance 15 of the valve block of thermistor 14
Part between pole is arranged to flat, to shorten the distance between two valve blocks；It is it is of course also possible to output pin 12 is overall
It is arranged to flat.
In another embodiment, Fig. 2 and Fig. 4 are referred to, to solid discharging tube 16 without encapsulating, is individually shifted out
It is electrically connected as independent individual with " the pressure-sensitive composite component of temperature-sensitive ", " the three-in-one composite protective mould of part encapsulating
Block ", it can also reach function similar in the composite protective module that three elements weld together back-to-back.In this way, the present embodiment
In, an in addition to metal extraction electrode 151, in piezo-resistance 15 and thermistor 14 are encapsulated in by high heat conduction encapsulated layer 18, gold
The second surface electrode for belonging to extraction electrode 151 and the valve block of piezo-resistance 15 is electrically connected, and at least partly exposes to high heat conduction bag
Sealing 18, treat to be electrically connected with the first electrode of solid discharging tube 16 161.It should be noted that " the pressure-sensitive composite component of temperature-sensitive "
The application circuit being electrically connected after being separated with solid discharging tube 16, the type selecting of its operation principle even component all with
" three-in-one composite protective module " is mutually similar, therefore still belongs to the protection domain of this patent.It is in this way, over-pressed in this embodiment
Protection module 10, the electrode welding that the first electrode of solid discharging tube 16 is drawn with the second surface of the valve block of piezo-resistance 15.
Hereinafter, labor explanation will be carried out to the operation principle of over-pressed protection module 10.
Traditional lightning protection circuit uses single clamper type piezo-resistance lightning protection component, and it is inclined can not to solve piezo-resistance leakage current
The opposition contradiction higher with piezo-resistance output residual voltage greatly, it is necessary to insertion switch type lightning protection component, form " pincers as shown in Figure 5
The mixed type lightning protection circuit structure of bit unit series switching devices ", could have on the basis of piezo-resistance inherently safe is ensured
Effect ground reduces thunderbolt output residual voltage, horizontal to reliable lightning Protection is provided by protection circuit.
Hybrid protective circuit shown in Fig. 5 is after switching device Z1 is sealed in, clamper pressure cell (i.e. piezo-resistance) MOV
The operation voltage of (hereinafter referred to as MOV) can do reduction by a relatively large margin, and hybrid circuit thunderbolt residual voltage is greatly lowered to reach
Design object；, can be with order to ensure the amplitude of the power frequency tolerance level of lightning protection circuit does not reduce, and is reduced MOV operation voltages
Compensated with the switching device Z1 of series connection " blocking voltage ", as long as ensureing that " clamper pressure cell operation voltage " adds " switch
Device blocking voltage " sum is more than default " peak value of maximum continuous work exchange voltage ", it is possible to reaches the power frequency of setting
Voltage tolerance level, meet the design mesh of " thunderbolt residual voltage is greatly reduced in the case where not reducing maximum continuous operating voltage "
Mark.
But while clamper pressure cell operation voltage is significantly dropped, the power frequency continued flow of circuit threatens risk also to increase simultaneously
Greatly, the key of both relation of balance is the determination of switching device Z1 type selecting and its parameter, because switching device Z1 volt
Peace characteristic determines many security parameters of hybrid circuit, the tolerance of discreteness, maximum power-frequency voltage such as direct current operation voltage
Horizontal, thunderbolt follows breaking time of power frequency continued flow etc..If using the switching mode lightning protection component gas-discharge tube that tradition is common
(GDT, Gas Discharge Tube) is used as series element, it will the stability even security of hybrid circuit is caused seriously
Influence because the discreteness of the several characterisitic parameters of GDT is too big, such as：Direct current operation voltage discreteness is very big, glow voltage
Fluctuating range is very big, the switching current of aura and arc light is unstable, gas returns to time uncertainty of inert condition etc.,
Make GDT suitable for application in residual voltage of in the mixed type lightning protection circuit structure of " clamp members series switching devices ", being struck by lightning to reduction
Without too big help.
In addition, there is the semiconductor discharge tube that one kind is commonly called as " solid discharging tube " in over-pressed protective device, such as TSS pipes, it is
A kind of switching device for characteristic of being turned back with negative resistance, possesses excellent switch overflow performance, its VA characteristic curve such as Fig. 6 institutes
Show.
" V of the TSS pipes with quite stableDRMBlocking voltage " parameter, this characteristic are allowed to be used in series it with piezo-resistance
Afterwards, both series direct current operation voltages have stably and controllable characteristic, and this characteristic is that series mixing circuit is safe and reliable
Important leverage.And the direct current operation voltage of conventional lightning protection GDT pipes is generally put in the range of ± the 20% of its nominal operation voltage
Dynamic, discreteness is too big, can not ensure the stability of the operation voltage after being connected with piezo-resistance.
Another important parameter " I of TSS pipesSThe numerical value of conducting trigger current " it is larger (generally reach 600~
800mA), this characteristic further ensure " MOV connects stability of the TSS " hybrid circuits to power network power-frequency voltage tolerance value,
Because under the conditions of nominal situation, power network power-frequency voltage either by MOV equivalent parallel electric capacity (generally 0.1~
10nF) or MOV itself leakage current can not all form the so big continuous power currents of 500mA, can not manage TSS naturally
Into " conducting state ", the stability without series mixing circuit under thunderbolt state has been ensured.And " the aura electricity of traditional GDT pipes
Stream " numerical value very little (generally only has 0.1~10mA), equivalent capacity of the power network by MOV or the leakage current institute by MOV itself
The power current amplitude of formation, it is possible to which unexpected triggering GDT pipes enter " aura state ", and then make GDT pipes fast transition to complete
" the arc light state " turned on entirely forms power current that is continuous, can not extinguishing, and therefore " MOV series connection GDT " hybrid circuit exists
Extremely unstable working condition is under line voltage stress, the stability and security of protection circuit itself can not be ensured.
The turn-off characteristic of " current over-zero be turn off " of TSS pipes TSS pipes effectively to interdict to follow in thunderbolt pulse
Power frequency afterwards continues electric current.Thunderbolt overvoltage pulse and grid stress double action under TSS pipes enter " conducting state " and
The power frequency continued flow followed is formd, because the alternating characteristics of power network power-frequency voltage cause power frequency continued flow to be bound to half of power frequency week
Zero-current point is passed through in phase, the TSS pipes after " zero passage " will return to " cut-off state " at once, as long as next power-frequency voltage
Peak value is less than " MOV operation voltages and TSS pipe blocking voltages sum ", and TSS pipes will maintain blocking state always, therefore the arteries and veins that is struck by lightning
Punching formed power frequency continued flow duration is not over 10 milliseconds.As long as the parameter type selecting of MOV and TSS pipes is proper, work
The amplitude of frequency afterflow is controllable, in the 10mS times caused temperature rise be also unlikely to that MOV valve block is caused to damage with TSS pipes.
And GDT pipes are not present the characteristic of " electric current zero just recovers blocking state " of similar TSS pipes, GDT pipes recover blocking state when
Between it is very uncertain, because returning to inertia by thunderbolt ionized gas in its pipe, the time of state of insulation does not ensure, test is frequent
It was found that within certain time after pulse of being struck by lightning, the gas in GDT pipes also in faint aura ionized state, if under
One power network crest voltage higher than " MOV operation voltages and GDT pipe glow voltages sum ", then GDT pipes will by line voltage after
Continuous triggering, power frequency continued flow be will be unable to extinguish, and MOV valve blocks and GDT pipes will be all among excess temperature danger, therefore in the design
GDT pipes can not substitute TSS to manage.
But TSS pipes are intended only as over-pressed protective device and applied not exchange in FPDP, FPDP for a long time
Electrical potential difference, power current problem, and the thunder-strike current ballistic throw of FPDP in most cases are followed in the absence of after thunderbolt
Degree is little, thus the thunderbolt current levels of conventional TSS pipes and the resistance to flow horizontal of power frequency be not high, for example packing forms are SMC's
Solid discharging tube, its 8/20uS waveform thunderbolt through-current capability are less than 500A, and continuous power frequency through-current capability is typically smaller than 20A.If
TSS pipes are simply applied to AC power port, TSS pipes are easy to by thunder-strike current or power current puncture short, because
This must fully assess the security feature of TSS pipes again.
TSS pipes are applied to power port, it is necessary to solve two problems in advance：First, the peak value for reducing thunder-strike current is allowed to
Fall within the thunder-strike current tolerance range of conventional TSS pipes；Second, the amplitude for reducing power network power frequency continued flow is allowed in conventional TSS
Within the tolerance range of pipe.Only solve the two problems, traditional TSS pipes are only possible to safely be applied to power port.
How to solve the problems, such as the reliable blocking of power frequency continued flow, be the key factor of this Novel lightning-proof design circuit feasibility.
It can see from analysis above, want greatly to reduce thunderbolt residual voltage, pressure must just be greatly reduced
The operation voltage of quick resistance, using the piezo-resistance of relatively low operation voltage just determine thunderbolt be followed by power frequency continued flow can not
Avoid；And under the working condition more than its maximum working voltage, the amplitude of caused power current also can be higher.Both
The generation of right power frequency continued flow be it is inevitable, and the amplitude of power current be also impossible to it is very low, then protection piezo-resistance
Unique channel with TSS pipes is exactly to consider how to shorten power current duration, is damaged in piezo-resistance with TSS pipes by high temperature
Power network power frequency continued flow is rapidly switched off before bad.The function of this high temperature cut-off current is realized, most suitable element is exactly PTC
(Positive Temperature Coefficient, positive temperature coefficient) thermistor.As can be seen here, in above-described embodiment
Solid discharging tube optional TSS pipes, or the solid discharging tube of other similar natures.
With reference to Fig. 2 and Fig. 3, the temperature of piezo-resistance 15 is detected and most having for high temperature cut-out is carried out to power network current
Effect means, the thermistor 14 with ptc characteristics is exactly printed into silver-colored valve block print silver-colored valve block with piezo-resistance 15 and directly carry on the back
Weld together backrest.Ensure that heat can efficiently conduct between two ceramic valve plates, make varistor and thermovalve
It is overall that piece forms a unified accumulation of heat, allows temperature-sensitive valve block effectively perceive and following the temperature change of varistor, in temperature
Default (such as 200~300 DEG C) after controlling warm area are raised to, using the resistance nonlinear transitions characteristic of temperature-sensitive valve block, make electricity
Net is supplied to the power current of piezo-resistance 15 to drastically reduce to the level of security of milliampere rank, prevents varistor temperature
Continue to rise, it is pressure-sensitive so as to prevent the temperature of varistor from entering the destructive warm area (generally at 500~600 DEG C) of danger
Valve block has just obtained effective Thermal protection.
Fig. 2 and Fig. 3 are referred to, the valve block of the valve block of thermistor 14 and piezo-resistance 15 is fit together weldering back-to-back
Connect, with regard to forming " the pressure-sensitive composite component of temperature-sensitive " that is commonly called as." the pressure-sensitive composite component of temperature-sensitive " is cascaded with TSS pipes, with regard to shape
Into " the pressure-sensitive compound low residual voltage lightning protection circuit of temperature-sensitive " as shown in Figure 3.
At initial stage caused by power current, PTC thermistor 14 does not reach its Curie temperature (being commonly called as " operating temperature ") also,
Its resistance value is maintained near normal temperature resistance, and power current caused Joule heat on varistor is EV=∫ uidt, power frequency electric
Stream caused Joule heat on thermistor 14 is ER=∫ i2Rdt.Because piezo-resistance 15 belongs to nonlinear device, actually flow through
The electric current i of temperature-sensitive and piezo-resistance 15 is not the sine-wave current of rule, thus Joule energy caused by reality preferably by
The voltage x current sampled data of digital oscilloscope carries out convolutional calculation.Exemplified by the circuit of figure 3 above, if the value of thermistor 14
10 Ω, operation voltage value 240VDC, the TSS pipe nominal voltage value 150VDC of piezo-resistance 15, this circuit is applied
320VAC power-frequency voltage, capture thermistor 14 and 15 respective voltage waveform data of piezo-resistance and flow through both electricity
Wave data is flowed, integral and calculating is carried out to Joule heat of the piezo-resistance 15 in 10mS respectively, obtains EV=6J, ER=1J, anti-mistake
To calculate to obtain both heating electric power PV=600W, PR=100W.
It can be seen that same electric current caused electrical power on thermistor 14 and piezo-resistance 15 has huge difference
Different, the electrical power of piezo-resistance 15 is almost 6 times of thermistor 14, it is meant that the temperature rate-of-rise of piezo-resistance 15 will
It is more faster than thermistor 14, if temperature-sensitive valve block is belonging respectively to two independent elements with varistor, do not deposit between the two
In thermal coupling, it is contemplated that when the temperature of piezo-resistance 15 reaches the invalid temperature of zinc oxide grain, thermistor 14
Temperature do not reach its effective high value warm area also, quick inhibitory action can not be formed to power network current, it is seen that the heat of separation
Quick resistance 14 can not protect the piezo-resistance 15 that power current flows through.
Only when two valve blocks of thermistor 14 and piezo-resistance 15 be welded into back-to-back an accumulation of heat it is overall when
Wait, the heat of the valve block of piezo-resistance 15 can quickly be conducted to the valve block of thermistor 14, even if both electrical power difference
Very big, the temperature of the valve block of thermistor 14 still can quickly follow the rate of rise in temperature of the valve block of piezo-resistance 15, because
Temperature rising for the valve block of thermistor 14 eliminates the reliance on simple power current heating effect, second, relying primarily on pressure-sensitive electricity
The direct heat transfer for hindering 15 valve blocks rises to produce temperature, therefore when the valve block temperature of piezo-resistance 15 crosses 200 DEG C,
The temperature of the valve block of thermistor 14 also quickly reaches 200 DEG C.In this warm area, the resistance of thermistor 14 has reached hundreds of
K Ω level, the power current that power network is formed by thermistor 14 and the loop of piezo-resistance 15 can also be reduced to several milliamperes
Level, electrical power caused by this faint electric current only have 1W or so, the heat consumption aproll already close to protection module to air
It is flat, therefore the temperature of protection module is maintained near 200 DEG C, does not continue to rise, and be efficiently avoid module and is reached pressure-sensitive electricity
Hinder the destruction warm area of 15 crystal grain (more than 300 DEG C).
Heat transfer has the time of a hysteresis in practical application, and the length of this lag time depends on heat in two valves
The resistance (being commonly called as " thermal resistance ") conducted between piece.Welding material and weld horizontal height between the size of " thermal resistance " and two valve blocks
It is related, it is necessary to increase the contact area of two valve blocks as much as possible and using the more preferable electrode material of heat conductivility and welding material
Material, so as to improve tolerance level of the composite protective module to power current.
Except " thermal resistance " factor, " equivalent thermal capacity " parameter of thermistor 14 and the valve block of piezo-resistance 15 is also design
The key parameter of " the pressure-sensitive multiple device of temperature-sensitive ".The equivalent thermal capacity of the valve block of thermistor 14 is also known as " action thermal capacity ", refers to
It is that the resistance value of thermistor 14 rises to its Curie temperature T for 25 DEG C from normal temperatureCThe energy absorbed.The valve block of piezo-resistance 15
" maximum thermal capacity " then refers to that varistor temperature rises to its energy damaged temperature and absorbed for 25 DEG C from normal temperature.Due to
The presence of " thermal resistance " between two valve blocks, the valve block of thermistor 14 follow lag time can not to the valve block temperature of piezo-resistance 15
Exist with avoiding, this factor is to influence the key factor that " hot pressing multiple device " impacts security to amplitude power current.
In order to reduce risk that varistor burnt by power current, it is necessary to increase " the maximum thermal capacity " of varistor as much as possible,
Reduce " the action thermal capacity " of temperature-sensitive valve block as far as possible simultaneously, make " actuation time " of the valve block of thermistor 14 much smaller than pressure-sensitive
" burn through time " of valve block, it is ensured that the security under power frequency dash current as defined in multiple device possesses certain allowance.
Because heat freely can quickly conduct between three parts of module, (heat of TSS pipes is first conducted to pressure-sensitive
Valve block, temperature-sensitive valve block is then conducted to again), therefore temperature-sensitive valve block can perceive and follow varistor and the temperature of TSS pipes
Situation of change, as long as the thermistor 14 of selection appropriate action thermal capacity, the can of thermistor 14 is to varistor and TSS
Pipe provides the overheat protector of safety, effectively prevents power current from, to varistor and the high temperature failure of TSS pipes, ensureing protection module
The safety of itself.
" three-in-one composite protective module " possessed barrier propterty of total incapsulation：
If carrying out Selection and Design according to working condition (220VAC ± 30%, the horizontal 3KV_1.2/50uS of lightning Protection),
It can determine that the parameter difference of " three-in-one " compound lightning-protection module various components inside is as follows：
Thermistor：R25=10 Ω ± 10%, TC=110 DEG C, valve block diameter 8mm, throttle slice thickness 3mm；
Piezo-resistance：UV=240VDC± 10%, valve block diameter 10mm, throttle slice thickness 1.2mm；
TSS is managed：Nominal operation voltage 180VDC± 10%, nominal 8/20uS discharge currents 400A.
Protection module sample progress 3KV_1.2/50uS lightning tests encapsulate will be welded and (while give module application
The maximum operation power-frequency voltages of 300VAC)：
1st, plus 300VAC alternating currents, 90 ° in voltage sine wave carry out thunderbolt impact with 270 ° of angles, and thunderbolt residual voltage is such as
Under：
Thunderbolt residual voltage：Uo1<600Vp (wave head peak voltage, t<1uS)
Thunderbolt residual voltage：Uo2<480Vp (terrace part voltage, t>1uS)
Follow current interrupt situation：Power frequency continued flow is held time less than 10mS after pulse.
2nd, apply 440VAC/5A simulating grid power-frequency overvoltage between 1,3 pin in module, test protection module 2,3
Output voltage amplitude between pin, as a result for：Uop<460Vp.
From test data, " three-in-one " lightning-protection module does not produce lasting power frequency continued flow electricity after pulse of being struck by lightning
Stream, 300VAC maximum operation grid conditions can be met.But the residual voltage of wave head spike is higher, although wave head pulsewidth is very narrow
(only 0.2uS), but can still threat be produced to late-class circuit.
Improved " three-in-one " protection module：
In further embodiment, referring to Fig. 7, over-pressed protection module 10 is in the ripple that is struck by lightning caused by lightning test
Over-pressed spike is by the operation voltage of solid discharging tube 16 and the clamp voltage of piezo-resistance 15 while caused by being superimposed, in order to disappear
Except the overvoltage of this wave head spike, it is necessary to which allowing 16 leading triggering and conducting of solid discharging tube and makes its both ends pressure drop as little as 5VDC, Ran Houzai
Open the progress thunder-strike current of piezo-resistance 15 to release, the wave head trigger voltage (about 200Vp) of such solid discharging tube 16 would not
Occur to be superimposed simultaneously with the clamp voltage of piezo-resistance 15.
Over-pressed protection module 10 utilizes the wave head that is struck by lightning by way of in the both ends high-voltage capacitors connected in parallel 19 of piezo-resistance 15
The characteristics of rising steepness is higher, the trigger current (about 0.8Ap) of solid discharging tube 16 is provided by electric capacity 19, avoid solid discharge
The trigger current of pipe 16 flows through piezo-resistance 15 and produces synergistic effect, reaches the effect for eliminating thunderbolt wave head spike.
In the present embodiment, 16 preferred TSS of solid discharging tube pipes.The value of electric capacity 19 will select with caution, avoid capacity too small
So that enough pulse currents can not be provided to trigger TSS pipes, while also excessive capacity is avoided to make normal 300VAC
Power-frequency voltage surprisingly triggers TSS pipes.
In addition, in the case that over-pressed protection module 10 is total incapsulation " three-in-one composite protective module ", electric capacity 19 can be with
It is encapsulated in using high heat conduction encapsulating resin interior.Over-pressed protection module 10 is the feelings of part encapsulating " three-in-one composite protective module "
Under condition, electric capacity 19 can be encapsulated in interior using high heat conduction encapsulating resin or is independently separately provided outside.
Improved " three-in-one " lightning-protection module is carried out into same thunderbolt shock-testing again to test with power frequency overvoltage, as a result
It is as follows：
1st, plus 300VAC alternating currents, 90 ° in voltage sine wave carry out thunderbolt impact with 270 ° of angles, as a result as follows：
Thunderbolt residual voltage：Uo<500Vp (random time), power frequency continued flow is held time less than 10mS after pulse.
2nd, 440VAC/5A simulating grid power-frequency overvoltage, test protection are applied between 1,3 pin in composite protective module
Output voltage amplitude between module 2,3 pin, as a result for：Uop<460Vp.
It can see by test result above, reach 300V in Operating VoltageACIn the case of, this patent design
The 3KV thunderbolts residual voltage of " three-in-one " lightning-protection module is very low, and only 500Vp, thunderbolt residual voltage is only than power network crest voltage 420Vp
About 80Vp is higher by, i.e., " residual voltage ratio " is only 1.2, is turned into real " lightning-protection module of ultra-low residual pressure ".And in traditional lightning protection side
In case, if protected using single 10D511K piezo-resistance 15, its 3KV thunderbolts residual voltage will be up to 1100Vp, and thunderbolt is residual
Pressure ratio reaches 2.2.It can be seen that the protection module of this patent design is highly effective in terms of residual voltage of being struck by lightning is reduced, prevent relative to traditional
Thunder and lightning road, the thunderbolt residual voltage of " three-in-one " compound protection module reduce 45%, have obvious performance advantage.
The further advantage of over-pressed protection module in this patent：
1st, over-pressed protection module can provide " the continuing power frequency overvoltage protection " of safety to equipment.
So-called " lasting power frequency overvoltage " refers to that supply voltage (for example zero line missing, single-phase connects for some reason
Earth fault, wiring error, power network itself fluctuation etc.) caused by voltage rise voltage magnitude is continued to exceed the maximum operation electricity of equipment
The phenomenon of pressure.Prolonged power frequency overvoltage will cause the damage that can not recover to device power supply (DPS), especially to work in power circuit
Two quite sensitive parts of frequency overvoltage：Lightning protection circuit piezo-resistance 15 and high-voltage energy storage electrochemical capacitor.
For considering for thunderbolt residual voltage is reduced, in traditional simple piezo-resistance Lightning Protection, the action of piezo-resistance is electric
Press peak value of the value mostly just than equipment maximum working voltage high by 10~20%, when the voltage pulsation amplitude of power network is super for a long time
When crossing+the 30% of its maximum working voltage, the piezo-resistance of lightning protection circuit will enter the active region that electric current is tens milliamperes,
Under the heat effect of this electric current, it is only necessary to which the time of 30 seconds to 1 minute or so, piezo-resistance will produce excess temperature short circuit and lose
Effect, may then smolder on fire burst.
The DC break down voltage for the high-voltage energy storage capacitor commonly used in the equipment of single phase power supply is two kinds of rule of 400VDC and 450VDC
Lattice, if power network power-frequency voltage continues to exceed+the 30% of equipment maximum working voltage, the voltage after rectification will exceed well over
500VDC, make the leakage of high-voltage aluminium electrolysis capacitance valve opening or even explode.
Traditional lightning protection circuit does not possess the rejection ability of continuous power frequency overvoltage.And this patent design is " three-in-one compound
Protection module ", as long as suitably choosing the direct current operation voltage parameter of varistor and TSS pipes, make both direct current operation voltages it
With less than 430VDC, it is possible to when power network crest voltage is more than 430VDC, triggering TSS pipe with varistor flows through power frequency
Electric current, heat caused by both directly heat to temperature-sensitive valve block, the resistance rapid transition of temperature-sensitive valve block is turned to height
Resistance value state, now the output power-frequency voltage of module is effectively suppressed exports in below 450VDC, to protect behind rectifier
450VDC high-voltage aluminium electrolysis capacitances, while composite protective module itself will not also produce damage, when power network power-frequency overvoltage failure
After exclusion, the cool time of 2~3 minutes is only needed, composite protective module can return to normal working condition again.
It can be seen that utilizing " three-in-one composite protective module ", accurately operation voltage characteristic can suppress power network power-frequency overvoltage
Output voltage amplitude, the damage of the sensitive components of effective protection equipment from power network fluctuation.
2nd, over-pressed protection module is resistant to the transient overvoltage TOV of longer time impact.
Frequency Transient Overvoltage is commonly called as TOV (English full name：Temporary over-voltage), it is to be passed through in supply network
Power network short time (0.1~5S) wave phenomenon often occurred, the reason for causing TOV overvoltage, have a lot, common are：It is perceptual big
The operation of type motor switch, the switching manipulation of Large Copacity capacitive load, grid cut-off power on operation, the transfer of power network high-pressure side earth fault
Overvoltage etc..Harm of the TOV overvoltage to piezo-resistance is very big, also can be pressure-sensitive because even being the zero point overvoltage of several seconds
Great power current heat is produced above resistance, for example for 510VDC piezo-resistance, overvoltage amplitude is
480VAC (10 Ω internal resistances) false voltage loads 1 second, and its caused heat in piezo-resistance is up to 800 joules.This
Heat levels are higher by 10 times than the nominal ceiling capacity tolerance value (being usually 70~80J) of 10D511K piezo-resistance, because
In the case where being impacted by the TOV of 480VAC (10 Ω internal resistances) 1S clocks, varistor valve will produce this 10D511K piezo-resistance
Cross warm type and burn short circuit, if not connecting suitable breaking release unit, the encapsulated layer of piezo-resistance will be by high-temperature baking
Smolder, or even catching fire.
In " three-in-one composite protective module ", the valve block of thermistor is to be bonded weldering back-to-back with the valve block of piezo-resistance
It is connected together, if the temperature of varistor rises the operating temperature for reaching thermistor under TOV impacts, then temperature-sensitive electricity
The resistance of resistance will be with " exponential law " sharp increase, so as to quickly suppress to flow through the power frequency electric of " three-in-one composite protective module "
Stream, finally makes aftercurrent maintain several mA level, under this aftercurrent, heat that current heating amount and module distribute
Reach balance, module stops temperature rise, and the temperature of whole lightning-protection module is effectively controlled below 300 DEG C, thus fully avoided
Varistor temperature touches its dangerous " crystal transition " warm area (generally at 500~600 DEG C), has ensured that piezo-resistance exists
Security under TOV impacts.When TOV in the past after, the temperature of protection module can be reduced gradually, be finally returned to normality temperature after
Continuous work.
It can be seen that " three-in-one " protection module thoroughly solves common piezo-resistance easily burns short-circuit failure under TOV impacts
Persistent ailment.
3rd, the online service life of over-pressed protection module significantly improves.
In the case where piezo-resistance is used alone, due to take into account thunderbolt residual voltage level, the operation voltage of piezo-resistance
Value is often only higher than power network crest voltage by 10~20%, i.e. and " chargeability " coefficient of piezo-resistance is often as high as 0.8~
0.9, in the case of so high on-load voltage, when voltage ripple of power network raises, the leakage current for flowing through piezo-resistance will
Quick increase, increased leakage current raises varistor temperature, because pressure-sensitive electric resistance ceramic powder generally has " negative temperature system
The characteristic of number ", temperature, which rises, makes the reduction of piezo-resistance operation voltage, and then increases leakage current, and temperature is higher, and leakage current is got over
Greatly, such vicious circle, the temperature that varistor is ultimately resulted in after the time is longer progressively reach damage temperature, make piezo-resistance
Short-circuit failure is burnt by high temperature.
And the varistor of " three-in-one composite protective module " has been connected and power network is just accessed after TSS is managed, as long as pressure
The operation voltage of quick valve block is with the blocking voltage sum of TSS pipes always above the crest voltage of power network, and there will be no leakage current stream
Cross varistor, therefore in the case where line voltage is less than the maximum working voltage of protection module, varistor it is " charged
Rate " is extremely low, does not almost have voltage stress above piezo-resistance, and its life-span, which has been inherently derived, significantly to be extended.
Therefore the online service life of whole " three-in-one composite protective module " is solely dependent upon its be struck by lightning pulse life-span and TOV
The life-span is impacted, it is also negative with " leakage current baking effect " by " long-term charged stress " not as single piezo-resistance 15
Influence, therefore the online service life of this protection module is significantly improved.
In addition, the maximum differential of " three-in-one composite protective module " with traditional " lightning protection circuit " in structure is, it is multiple
Three parts for closing protection module are not simply to be existed using separate " discrete element " as traditional lightning protection circuit
Together, but by way of " back-to-back direct heat transfer ", temperature-sensitive valve block and varistor are managed with TSS for electrical communication
Hard-pressed bale seamlessly welds together in a manner of " back-to-back ", farthest reduces what heat conducted between two valve blocks
" thermal resistance ", three parts is formed an excellent hot conductor, therefore these three elements can be made full use of respective non-thread
Property feature interacts protection, so as to possess following defencive function：
Raised using the resistance of thermistor with temperature and the thermo-responsive characteristic of index transition is presented, by temperature-sensitive valve block and pressure
Closely fitting welds together quick valve block, it is possible to which controlling stream crosses the current duration of piezo-resistance, suppresses varistor
Temperature elevation amplitude, prevent piezo-resistance power current effect under enter its " destruction warm area ", protect piezo-resistance not by
Excess temperature damages；
Increased and increased clamping performance with electric current using the pressure drop of piezo-resistance both ends, piezo-resistance is connected in series to TSS pipes
On, it is possible to suppress the amplitude of " following power frequency continued flow " after being struck by lightning, protection TSS pipes, protect it from excessive power current
Impact and damage；
The characteristics of leakage current is extremely low under blocking voltage using TSS pipes, TSS is managed and connected with piezo-resistance, can be hindered
Only under the conditions of nominal situation grid power leakage stream generation, the charged stress of piezo-resistance is greatly reduced, effectively extends pressure-sensitive electricity
The online service life of resistance；
When power network TOV crest voltages exceed the maximum working voltage of protection module, the power frequency of varistor is flowed through
Electric current makes varistor produce substantial amounts of heat, and this heat to the temperature-sensitive valve block for being close to varistor quickly add simultaneously
Heat, produce the resistance of temperature-sensitive valve block and quickly rise to, the power current for flowing through protection module is reduced to milliampere rank rapidly
Level of security, persistently riseing for protection module temperature is prevented, prevent protection module itself by high temperature failure.
The maximum differential of " three-in-one composite protective module " with traditional " lightning-protection module " functionally is, composite protective
Module is also equipped with " power network power frequency overvoltage protection " function of uniqueness except possessing the over-pressed safeguard function of transient state thunderbolt：It can be incited somebody to action
Transient state or continuous power-frequency overvoltage from power network are suppressed under the amplitude of a safety to be exported to rear level power supply again, is had
Imitate the voltage-sensitive component (such as high-voltage energy storage capacitor, semiconductor switch device) in protection power source circuit.It is and traditional " anti-
Thunder module " is that do not possess " continuous power frequency overvoltage " tolerance, is continuously exceeding the power network peak value of 1.2 times of its operation voltage
Under voltage effect, piezo-resistance 15 will damage excess temperature quickly.Therefore " the power network power frequency overvoltage of " three-in-one composite protective module " is said
Protection " function phase is a kind of innovative safeguard function for traditional schemes of prevention against lightning, and this function is using electric equipment with very
Low cost realizes the protection to power network abnormal overvoltage, enhances adaptability of the equipment to power network fluctuation, improves equipment
Security.
The maximum differential of " three-in-one composite protective module " with traditional " lightning-protection module " on lightning protection properties is, " three
Unify composite protective module " have that the thunderbolt residual voltage more much lower than traditional lightning-protection module is horizontal, it belongs to truly " super
The lightning-protection module of low residual voltage ".By being connected under varistor with the TSS switching-type devices for stablizing blocking voltage characteristic,
The type selecting of the operation voltage of piezo-resistance 15 can be allowed to break away from the restriction of " chargeability " factor suffered by traditional piezo-resistance 15,
Allow its operation voltage that (relative to traditional lightning protection circuit its highest range of decrease up to 50%) is greatly lowered, effectively to reduce
The thunderbolt residual voltage level of module creates necessary condition, because varistor operation voltage is greatly reduced, makes entirely to protect
The output thunderbolt residual voltage level of module also correspondingly reduces same amplitude (maximum decreases by 50%), makes composite protective mould
The thunderbolt " residual voltage ratio " of block is once reduced to 1.2 level by 2.2 levels of traditional circuit, and being struck by lightning, residual pressure drop is low to be had very much
The amplitude imitated and reduced is considerable.
The quick excess temperature cut-off current characteristics of " temperature-sensitive+pressure-sensitive " composite component are utilized, composite module has effectively and rapidly been interdicted and has existed
Power frequency continued flow is followed after thunderbolt, thoroughly eliminates existing power frequency after being greatly lowered due to the operation voltage of varistor
Afterflow risk, ensure composite protective module from the safety and reliability of the long-term work under maximum working voltage.
Creatively TSS thyristors are incorporated among the lightning Protection Design of AC port, form " piezo-resistance 15
The mixing lightning protection circuit of clamp members series connection TSS switching devices ", ingenious " current over-zero is the characteristic of shut-off " using TSS pipes,
The duration for following power frequency continued flow formed after pulse of being struck by lightning is controlled within 10 milliseconds, makes the power frequency after thunderbolt
Afterflow is accomplished controllable and safe.
Both ends pressure drop after being turned on due to TSS pipes is very low (about 5VDC), under power current impact, the electrical power of TSS pipes
Relatively low, its caloric value is far smaller than varistor connected in series, and TSS pipes are to the heating effect of temperature-sensitive valve block relative to pressure sensitive valve
It is much lower for piece, therefore even if TSS pipes are individually shifted out from composite protective module as independent individual with " temperature-sensitive+
Pressure-sensitive composite component " is electrically connected, and can also reach the composite protective module phase that three devices weld together back-to-back
Near function.But the application circuit that " the pressure-sensitive composite component of temperature-sensitive " is electrically connected after being separated with TSS pipes, its operation principle
Even the type selecting of component is all mutually similar with " three-in-one composite protective module ", therefore still belongs to the protection model of this patent
Enclose.
By piezo-resistance connect TSS pipes connected mode, by the operation voltage of piezo-resistance significantly in a creative way
50% is reduced, in the case of the power frequency tolerance level of protection module is not reduced, thunderbolt residual voltage level is effectively reduced 45%,
A kind of design path that is reliable, disclosure satisfy that ultralow thunderbolt residual voltage level is started.
" piezo-resistance operation voltage " and " TSS blocking voltages " sum in composite protective module is chosen at 450VDC
Under, protection module is first clamped power network output voltage when by being impacted higher than the continuous overvoltage of 320VAC power network
Position in below 480VDC exports the high-voltage rectifier to power supply again, 450VDC high pressures storage that can effectively in protection equipment power supply
Energy electric capacity, has started a kind of Technology Ways that are economical and practical, can realizing the continuous power-frequency overvoltage defencive function of power network.
In addition, referring to Fig. 1, additionally providing a kind of electrical equipment, there is live wire input terminal Li, zero line input terminal N
With load circuit 50, in addition to above-mentioned over-pressed protection module 10, input pin 11, the output pin of over-pressed protection module 10
12 and common pin 13 sequentially respectively with live wire input terminal Li, load circuit 50 and zero line input terminal N be electrically connected.
Above example is only to illustrate the technical solution of the utility model, rather than its limitations；Although with reference to foregoing reality
Example is applied the utility model is described in detail, it will be understood by those within the art that：It still can be to preceding
State the technical scheme described in each embodiment to modify, or equivalent substitution is carried out to which part technical characteristic；And these
Modification is replaced, and the essence of appropriate technical solution is departed from the essence of each embodiment technical scheme of the utility model embodiment
God and scope.
Claims (10)
- A kind of 1. over-pressed protection module, it is characterised in that the temperature-sensitive electricity including solid discharging tube, piezo-resistance and positive temperature coefficient The valve block of resistance, the valve block of the thermistor and the piezo-resistance is respectively provided with two relative surface electrodes, wherein：The first surface electrode of the thermistor valve block is close to and with height with the first surface electrode of the varistor valve Thermal conductivity material is electrically connected, and draws the output pin of module；The second surface electrode conduct of the thermistor valve block The input pin of module；The first electrode of the solid discharging tube and the second surface electrode of the varistor valve electrically connect Connect, the common pin of the second electrode of the solid discharging tube as module.
- 2. over-pressed protection module as claimed in claim 1, it is characterised in that also including a capacitor, the capacitor and institute State the connection of piezo-resistance parallel coupled electrical.
- 3. over-pressed protection module as claimed in claim 1, it is characterised in that also including high heat conduction encapsulated layer, the high heat conduction The solid discharging tube, piezo-resistance and thermistor are encapsulated in interior by encapsulated layer.
- 4. over-pressed protection module as claimed in claim 3, it is characterised in that the first electrode of the solid discharging tube with it is described The second surface electrode electrical connection of varistor valve, and the solid discharging tube is close to the of the varistor valve Two surface electrodes.
- 5. over-pressed protection module as claimed in claim 1, it is characterised in that also drawn including high heat conduction encapsulated layer and a metal Electrode, in the piezo-resistance and thermistor are encapsulated in by the high heat conduction encapsulated layer, the metal extraction electrode with it is described Varistor valve second surface electrode electrical connection and, at least partly expose to the high heat conduction encapsulated layer.
- 6. over-pressed protection module as claimed in claim 5, it is characterised in that the first electrode of the solid discharging tube with it is described The exposed parts electrical connection of metal extraction electrode.
- 7. the over-pressed protection module as described in claim 3 or 5, it is characterised in that the high heat conduction encapsulated layer is organosilicon tree Lipid layer.
- 8. over-pressed protection module as claimed in claim 1, it is characterised in that the output pin is located at the thermistor valve Part between the first surface electrode of piece and the first surface electrode of the varistor valve for flat.
- 9. over-pressed protection module as claimed in claim 1, it is characterised in that the solid discharging tube is managed for TSS.
- 10. a kind of electrical equipment, there is live wire input terminal, zero line input terminal and load circuit, it is characterised in that also include Over-pressed protection module described in any one of claim 1 to 9, wherein, input pin, the output pin of the over-pressed protection module Sequentially it is electrically connected respectively with the live wire input terminal, load circuit and zero line input terminal with common pin.
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| CN201720396716.7U CN206673575U (en) | 2017-04-14 | 2017-04-14 | A kind of over-pressed protection module and electrical equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106972474A (en) * | 2017-04-14 | 2017-07-21 | 陆饶丹 | A kind of over-pressed protection module and electrical equipment |
| EP3832825A4 (en) * | 2018-11-28 | 2021-09-29 | Xiamen Set Electronics Co., Ltd | Surge protection device and system |
-
2017
- 2017-04-14 CN CN201720396716.7U patent/CN206673575U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106972474A (en) * | 2017-04-14 | 2017-07-21 | 陆饶丹 | A kind of over-pressed protection module and electrical equipment |
| EP3832825A4 (en) * | 2018-11-28 | 2021-09-29 | Xiamen Set Electronics Co., Ltd | Surge protection device and system |
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