CN205846698U - There is the RCCB of overvoltage protection and low-voltage protection - Google Patents
There is the RCCB of overvoltage protection and low-voltage protection Download PDFInfo
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- CN205846698U CN205846698U CN201620715352.XU CN201620715352U CN205846698U CN 205846698 U CN205846698 U CN 205846698U CN 201620715352 U CN201620715352 U CN 201620715352U CN 205846698 U CN205846698 U CN 205846698U
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Abstract
The utility model discloses the RCCB with overvoltage protection and low-voltage protection; its zero sequence current mutual inductor outfan one end is connected to rectifier bridge stack negative pole of output end; the other end connects the positive pole of the 4th diode; the negative pole of the 4th diode and the 5th resistance one end are connected, and the other end of the 5th resistance and the control pole of the first thyristor or grid are connected；The anode of the first conductor switch element is connected with rectifier bridge stack output head anode, and the negative electrode of the first thyristor is connected with rectifier bridge stack negative pole of output end；Second capacitor two ends respectively with the negative electrode of the first thyristor or source electrode and control pole or delete and be connected；Second diode and the 4th resistor coupled in parallel, and the parallel connected end of the positive pole of corresponding second diode is connected with the negative electrode of the first thyristor.This utility model can not only circuit occur electric leakage time deenergization protect personal safety, it is also possible to supply voltage overvoltage or under-voltage time disconnection, it is to avoid have an accident.
Description
Technical field
This utility model relates to RCCB, particularly to a kind of band over-voltage protecting function and low-voltage protection function
RCCB.
Background technology
RCCB (or steelyard slepsydra electric switch) is commonly used low-voltage distribution device for switching, is used for protecting person peace
Entirely.
Due to reasons such as power supply network fault, equipment switching, misphase, circuit resonance, often can cause supply line that power frequency occurs
Overvoltage fault, power-frequency overvoltage can make electrical equipment overload even burn.
On the other hand, due to electric power system self load problem or fault, supply voltage may be made to reduce, when power supply electricity
After pressure drops to less than the 80% of rated voltage, the rotating speed causing motor being decreased obviously, so that being forced stall, making motor
Burn because of stall.Meanwhile, too low supply voltage also will result in the release of low voltage switch contact, makes the control circuit can not
Normal work, causes the damage of personal injury and plant equipment.
Therefore, if when overvoltage occurs in power supply or under-voltage reaches certain limit, by dump, electric power can be protected
Electronic equipments safety and personal safety, avoid having an accident, improve equipment dependability.
General RCCB does not have overvoltage or low-voltage protection function, and existing have overvoltage/under-voltage guarantor
The RCCB of protective function or there is the electricity that the assembly of overvoltage/low-voltage protection function typically uses operational amplifier to be base
Voltage is detected by pressure comparison circuit, but this circuit exists following deficiency: is easily disturbed, needs to increase anti-interference setting
Meter；Need configuring direct current working power；The assembly of voltage/low-voltage protection function needs to increase installing space and causes small product size
More much bigger than common RCCB；Cost of manufacture is higher.
Utility model content
In order to overcome the disadvantages mentioned above of prior art with not enough, the purpose of this utility model is to provide a kind of band overvoltage
With the RCCB of low-voltage protection function, not only there is creepage protection function, and there is overvoltage and low-voltage protection
Function, its safety and reliability is much higher than the RCCB of prior art, and band overvoltage of the present utility model and
The RCCB of low-voltage protection function is suitable with existing common RCCB volume.
The purpose of this utility model is achieved through the following technical solutions:
There is the RCCB of overvoltage protection and low-voltage protection, including the first thyristor, the second half
Conductor switch element, the first non-linear to voltage element, the second non-linear to voltage element, the first diode, the first resistance, the second electricity
Resistance, the first capacitor, relay, zero sequence current mutual inductor and rectifier bridge stack；Described relay is by dropout link gear and breaks
Way switch connects, and the input of disconnect switch is connected with power supply, and the outfan of disconnect switch connects two copper cash, these two copper cash
Load is connected after zero sequence current mutual inductor；The coil of relay is connected with the input of rectifier bridge stack, two ends after series connection
It is connected with two terminals of outfan of disconnect switch；
Described zero sequence current mutual inductor outfan one end is connected to rectifier bridge stack negative pole of output end, and the other end connects the four or two
The positive pole of pole pipe, the negative pole of the 4th diode and the 5th resistance one end are connected, and the other end and first quasiconductor of the 5th resistance are opened
The control pole or the grid that close element are connected；The anode of the first conductor switch element is connected with rectifier bridge stack output head anode, and first
The negative electrode of thyristor is connected with rectifier bridge stack negative pole of output end；Second capacitor two ends are opened with the first quasiconductor respectively
Close negative electrode or the source electrode of element and control pole or delete connected；Second diode and the 4th resistor coupled in parallel, and the corresponding 2nd 2
The parallel connected end of the positive pole of pole pipe is connected with the negative electrode of the first thyristor, the parallel connected end of the negative pole of corresponding second diode
It is connected with the negative pole of the 4th diode；One end and the output of rectifier bridge stack after second non-linear to voltage element and the second resistant series
Rectifying the most connected, the negative pole of the other end and the 4th diode connects；The negative electrode of the second thyristor or source electrode and rectification
Bridge heap negative pole of output end is connected, and anode or the drain electrode of the second thyristor are connected with one end of the 3rd resistance, the 3rd electricity
The other end of resistance is connected with the output head anode of rectifier bridge stack；The positive pole of the 3rd diode and the sun of the second thyristor
Pole or drain electrode are connected, and the negative pole of the 3rd diode and the negative pole of the 4th diode connect；First non-linear to voltage element and first
After resistant series, one end is connected with the output head anode of rectifier bridge stack, the control pole of the other end and the second thyristor or
Grid is connected；First diode and the first capacitor are in parallel, and the parallel connected end of corresponding first diode cathode is opened with the second quasiconductor
The control pole or the grid that close element are connected, the parallel connected end of corresponding first diode cathode and the negative pole of output end phase of rectifier bridge stack
Even.
For realizing this utility model purpose further, it is preferable that described RCCB also includes test resistance and test
Button；After test resistance is connected with test button, an outfan of one end and disconnect switch is directly connected to, the line of the other end
It is connected with another outfan of disconnect switch.
Preferably, described first thyristor and the second thyristor are all one-way SCR, two-way
Controllable silicon or field effect transistor.First thyristor preferably employs one-way SCR (IGCT)；Second semiconductor switch
Element can use one-way SCR, it would however also be possible to employ low pressure small-power field effect transistor.
Preferably, described first non-linear to voltage element and the second non-linear to voltage element are varistor or quasiconductor wink
State voltage suppression diode.
Preferably, one-way SCR all selected by described first thyristor and the second thyristor, point
It is not the first one-way SCR and the second one-way SCR；The first resistance to forcing up the targets of one-way SCR is more than the 2 of supply voltage peak value
Times, the second one-way SCR chooses the resistance to forcing up the targets controllable silicon more than 25V；3rd resistance is the 10 of the resistance of the 4th resistance
Times；First diode and the second diode all use 2.4V Zener diode；First resistance and the second resistance are current-limiting resistance, adopt
It is 100K 500K low-power resistance by resistance；5th resistance, as current-limiting resistance, uses 330 ohmages；First capacitor and
Second capacitor all uses 0.1 micro farad capacitor.
Preferably, described first one-way SCR uses pressure 800V controllable silicon.
Preferably, using the first controllable silicon as the first thyristor, N-channel field effect transistor is led as the second half
Body switch element；Use the first varistor and the second varistor respectively as the first non-linear to voltage device and the second voltage
Nonlinear device.
Preferably, described N-channel field effect transistor selects trigger voltage parameter VTFor 1V, pressure 30V, maximum conducting electric current 1A
Field effect transistor；The pressure sensitive voltage parameter of described first varistor and the second varistor is respectively 242V and 382V；3rd
Resistance is 10 times of the resistance of the 4th resistance；First diode and the second diode all use 2.4V Zener diode；The
One resistance and the second resistance are current-limiting resistance, and using resistance is 100k 500k low-power resistance；5th resistance is as current limliting electricity
Resistance, uses 330 ohmages；First capacitor and the second capacitor all use 0.1 micro farad capacitor.
Preferably, described first thyristor and the second thyristor are the most all selected unidirectional controlled
Silicon, the respectively first one-way SCR and the second one-way SCR；Described first non-linear to voltage element and the second voltage non-thread
Property element is the first quasiconductor Transient Suppression Diode and the second quasiconductor Transient Suppression Diode.
Preferably, described first quasiconductor Transient Suppression Diode and the electric conduction of the second quasiconductor Transient Suppression Diode
Pressure parameter is respectively 240V and 380V.
This utility model dropout link gear T is worked by the adhesive action of electromagnetic type relay K, when relay K is led to
During electricity adhesive, mechanical release device is promoted to make disconnect switch SW disconnect.
Earth leakage protective triggers circuit and includes: zero sequence current mutual inductor L, rectifier bridge stack Z, the first thyristor, the
Four diode D4, the 5th resistor R5, the second diode D2, the second capacitor C2, relay K and be connected with relay K de-
Button link gear T.When the circuit being connected with the RCCB of this utility model band overvoltage and low-voltage protection leaks electricity
Time, the total current through zero sequence current mutual inductor L is not zero, and the outfan loop of zero sequence current mutual inductor L has electric current to flow through,
This electric current reaches to trigger the first thyristor conducting during scheduled current, so that the relay K being attached thereto obtains electric, touches
Loss of hairs button link gear T makes chopper disconnect.The most normally work for detection leakage protection circuit, be also provided with leak(age) test and return
Road, including test resistance RTWith test button SK, when this utility model band overvoltage and low-voltage protection RCCB just
When often working, press test button SK, test resistance RTWith power supply UNICOM, this resistance has electric current to flow through so that zero-sequence current is mutual
The outfan loop of sensor L has electric current to flow through, and this current trigger first thyristor turns on, so that be attached thereto
Relay obtains electric, triggers dropout link gear T and makes chopper disconnect.
Low-voltage protection triggers circuit and includes: rectifier bridge stack Z, the first thyristor, the first non-linear to voltage unit
Part, the first capacitor C1, the first resistance R1, the 3rd resistance R3, the 4th resistance R4, the 5th resistance R5, the first diode D1, second
Diode D2, the 3rd diode D3, the second thyristor, relay K and the dropout link gear being connected with relay K
T.When the supply voltage being connected with this utility model RCCB is less than the lower voltage limit of design, the first non-linear to voltage unit
Part is not turned on, and the second thyristor is not turned on, and the 3rd resistance R3, the 3rd diode D3 and the 4th resistance R4 form series connection
Circuit, this series circuit is connected in parallel on rectifier bridge stack Z outfan, and the dividing potential drop on the 4th resistance R4 triggers the first thyristor
Conducting, so that the relay K being attached thereto obtains electric, triggers dropout link gear and makes chopper disconnect；When with this utility model
When the supply voltage that RCCB connects is higher than the lower voltage limit designed, the first non-linear to voltage element conductive, this electric conduction
Stream triggers the second thyristor, changes the 3rd resistance R3, the 3rd diode after the second thyristor conducting
The series circuit intrinsic standoff ratio that D3 and the 4th resistance R4 is formed, the dividing potential drop on the 4th resistance R4 is substantially reduced so that the first quasiconductor
Switch element is in cut-off state, and dropout link gear T is failure to actuate.
Overvoltage protection triggers circuit and includes: rectifier bridge stack Z, the first thyristor, the second non-linear to voltage unit
Part, the second resistance R2, the 4th resistance R4, the 5th resistance R5, the second diode D2 (Zener diode), the second capacitor C2, continue
Electrical equipment K and the dropout link gear T being connected with relay K.When the supply voltage being connected with this utility model RCCB surpasses
When crossing design upper voltage limit, the second non-linear to voltage element conductive, conducting electric current dividing potential drop on the 4th resistance R4 triggers first
Thyristor turns on, so that the relay K being attached thereto obtains electric, triggers dropout link gear T and makes chopper disconnect.
Compared with prior art, this utility model has the following advantages and beneficial effect:
1) band overvoltage of the present utility model and the RCCB of low-voltage protection function, can not only occur at circuit
During electric leakage, deenergization is to protect personal safety, it is also possible to supply voltage overvoltage or under-voltage time disconnect, it is to avoid have an accident；
2) RCCB of band overvoltage of the present utility model and low-voltage protection function need not external over-and under-voltage
Protection assembly, saves installing space, and small product size is suitable with existing common RCCB；
3) RCCB of band overvoltage of the present utility model and low-voltage protection function uses non-linear to voltage element
Realize overvoltage and under-voltage Detection & Controling, low cost of manufacture higher than the over-and under-voltage protector reliability of prior art.
Accompanying drawing explanation
Fig. 1 is band overvoltage and the RCCB circuit company of low-voltage protection function of embodiment 1 of the present utility model
Connect schematic diagram.
Fig. 2 is band overvoltage and the RCCB circuit company of low-voltage protection function of embodiment 2 of the present utility model
Connect schematic diagram.
Fig. 3 is band overvoltage and the RCCB circuit company of low-voltage protection function of embodiment 3 of the present utility model
Connect schematic diagram.
Shown in figure: first controllable silicon SCR the 1, second controllable silicon SCR 2, N-channel field effect transistor NMOS, the first varistor
RV1, the second varistor RV2, the first quasiconductor Transient Suppression Diode TVS1, the second quasiconductor Transient Suppression Diode TVS2,
First diode D1, the second diode D2, the 3rd diode D3, the 4th diode D4, the first resistance R1, the second resistance R2,
Three resistance R3, the 4th resistance R4, the 5th resistance R5, the first capacitor C1, the second capacitor C2, relay K, dropout link gear
T, zero sequence current mutual inductor L, rectifier bridge stack Z, disconnect switch SW.Wherein the first diode D1 and the second diode D2 is voltage stabilizing two
Pole pipe, test resistance RT, test button SK.
Detailed description of the invention
For being more fully understood that this utility model, with embodiment, this utility model is said further below in conjunction with the accompanying drawings
Bright, but embodiment of the present utility model is not limited to this.
Embodiment 1
The present embodiment uses first controllable silicon SCR the 1, second controllable silicon SCR 2 as the first thyristor and second
Thyristor；Use the first varistor RV1, the second varistor RV2 respectively as the first non-linear to voltage device and
Second non-linear to voltage device.
As it is shown in figure 1, a kind of RCCB with overvoltage protection and low-voltage protection, including the first controllable silicon
SCR1, second controllable silicon SCR the 2, first varistor RV1, the second varistor RV2, the first diode D1, the second diode D2,
3rd diode D3, the 4th diode D4, the first resistance R1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4, the 5th electricity
Resistance R5, the first capacitor C1, the second capacitor C2, relay K, dropout link gear T, zero sequence current mutual inductor L, rectifier bridge
Heap Z, disconnect switch SW, test resistance RT, test button SK.
Relay K is connected with disconnect switch SW by dropout link gear T, and the input of disconnect switch SW is with power supply even
Connecing, the outfan of disconnect switch SW connects two copper cash, and these two copper cash connect load after zero sequence current mutual inductor L；
Relay K controls disconnect switch SW by dropout link gear T, promotes linkage of threading off when the coil of relay K obtains electric adhesive
Mechanism T makes disconnect switch SW disconnect；Test resistance RTOne end and an output of disconnect switch SW after connecting with test button SK
End is directly connected to, and the other end is connected with another outfan through the disconnect switch SW after zero sequence current mutual inductor L；Relay K
Coil connect with the input of rectifier bridge stack Z, after series connection, two ends are connected with two terminals of outfan of disconnect switch SW, due to
Article two, whether connecting line does not affect through zero sequence current mutual inductor L the effect of this utility model circuit, for easy to connect, this
The two junction point correspondence is connected on above-mentioned test resistance R by embodimentTWith test button SK series loop two ends.
Zero sequence current mutual inductor L outfan one end is connected to rectifier bridge stack Z negative pole of output end, and the other end connects the four or two pole
The positive pole of pipe D4, the negative pole of the 4th diode D4 and the 5th resistance R5 one end are connected, and the other end and first of the 5th resistance R5 can
The control of control silicon SCR1 is the most connected.The anode of the first controllable silicon SCR 1 is connected with rectifier bridge stack Z output head anode, the first controllable silicon
The negative electrode of SCR1 is connected with rectifier bridge stack Z negative pole of output end.Second capacitor C2 two ends respectively with the moon of the first controllable silicon SCR 1
Pole is extremely connected with control；Second diode D2 and the 4th resistance R4 is in parallel, and the parallel connected end of the positive pole of corresponding second diode D2
It is connected with the negative electrode of the first controllable silicon SCR 1, the parallel connected end of the negative pole of corresponding second diode D2 and the negative pole of the 4th diode D4
Connect；Second varistor RV2 are connected with the output head anode of rectifier bridge stack Z with one end after the second resistance R2 series connection, the other end
It is connected with the negative pole of the 4th diode D4；The negative electrode of the second controllable silicon SCR 2 is connected with rectifier bridge stack Z negative pole of output end, and second can
The anode of control silicon SCR2 and one end of the 3rd resistance R3 are connected, and the other end of the 3rd resistance R3 is rectified with the output of rectifier bridge stack Z
The most connected；The positive pole of the 3rd diode D3 and the anode of the second controllable silicon SCR 2 are connected, the negative pole and the 4th of the 3rd diode D3
The negative pole of diode D4 connects；First varistor RV1 connect with the first resistance R1 after the output of one end and rectifier bridge stack Z rectify
The most connected, the control of the other end and the second controllable silicon SCR 2 is the most connected；First diode D1 and the first capacitor C1 is in parallel, corresponding
The parallel connected end of the first diode D1 negative pole is extremely connected with the control of the second controllable silicon SCR 2, and corresponding first diode D1 positive pole is also
Connection end is connected with the negative pole of output end of rectifier bridge stack Z.
Earth leakage protective triggers circuit and includes: zero sequence current mutual inductor L, rectifier bridge stack Z, the first controllable silicon SCR the 1, the 4th 2
Pole pipe D4, the 5th resistance R5, the second diode D2, the second capacitor C2, relay K, dropout link gear T and disconnect switch
SW.When the circuit being connected with the RCCB of this utility model band overvoltage and low-voltage protection occurs electric leakage, through zero
The total current of sequence current transformer L is not zero, and the outfan loop of zero sequence current mutual inductor L has electric current to flow through, and this electric current is through
Four diode rectifications, then the control pole of the first controllable silicon SCR 1 is flowed to by the 5th resistance R5, break when electric current reaches predetermined electric leakage
Trigger the first controllable silicon SCR 1 during the device specification electric current of road to turn on, make the outfan short circuit of rectifier bridge stack Z, cause and rectifier bridge stack Z
Input series connection relay K energized action, trigger dropout link gear T make disconnect switch SW disconnect.Above-mentioned work process
In, zero sequence current mutual inductor L outfan loop current is carried out rectification by the 4th diode, and triggers after the 5th resistance R5 current limliting
First controllable silicon SCR 1；Second diode D2 is Zener diode, for protection the first controllable silicon SCR 1, it is to avoid input first can
It is damaged by the overtension of control silicon SCR1；Second capacitor C2 is used for absorbing interference signal and prevents the first controllable silicon SCR 1
False triggering.
The most normally work for checking leakage protection circuit, be also provided with leak(age) test loop, including test resistance RTWith
Test button SK；When the RCCB of this utility model band overvoltage and low-voltage protection normally works, press test by
Button SK, test resistance RTElectric current is had to flow through, owing to this current path is unidirectional through zero sequence current mutual inductor so that through zero sequence electricity
The total current of current transformer L is not zero, and the outfan loop of zero sequence current mutual inductor L has electric current to flow through, this current trigger first
Controllable silicon SCR 1 turns on, so that the relay K being attached thereto obtains electric, triggers dropout link gear T and makes disconnect switch SW disconnect.
Low-voltage protection triggers circuit and includes: rectifier bridge stack Z, first controllable silicon SCR the 1, first varistor RV1, first
Resistance R1, the 3rd resistance R3, the 4th resistance R4, the first capacitor C1, the 5th resistance R5, the first diode D1, the second diode
D2, the 3rd diode D3, the second controllable silicon SCR 2, relay K and the dropout link gear T being connected with relay K, disconnect switch
SW。
Low-voltage protection operation principle is: when the supply voltage being connected with this utility model RCCB is less than design
During lower voltage limit, the first varistor RV1 is not turned on, and the second controllable silicon SCR 2 is not turned on, the 3rd resistance R3, the 3rd diode D3
And the 4th be connected in parallel on the outfan of rectifier bridge stack Z after resistance R4 series connection, the dividing potential drop on the 4th resistance R4 triggers the first controllable silicon
SCR1 turns on, and makes the outfan short circuit of rectifier bridge stack Z, causes the relay K connected with the input of rectifier bridge stack Z to obtain electronic
Make, trigger dropout link gear T and make disconnect switch SW disconnect, i.e. when supply voltage too low (under-voltage), circuit breaker trip, from
And play low-voltage protection effect.When the supply voltage being connected with this utility model RCCB is higher than the lower voltage limit of design
Time, the first varistor RV1 conducting, this conducting current trigger second controllable silicon SCR 2, reduces after the second controllable silicon SCR 2 conducting
Dividing potential drop on 4th resistance R4 so that the first controllable silicon SCR 1 is in cut-off state, dropout link gear T is failure to actuate.Above-mentioned
In work process, the first resistance R1 is for limiting the first varistor RVThe conducting electric current of 1；First diode D1 is voltage stabilizing two pole
Pipe, for protection the second controllable silicon SCR 2, it is to avoid input that the trigger voltage of the second controllable silicon SCR 2 is too high to be damaged it；The
One capacitor C1 is used for absorbing interference signal and prevents the second controllable silicon SCR 2 false triggering.Second diode D2 is Zener diode,
For protecting the first controllable silicon SCR 1, it is to avoid it is damaged by the overtension inputting the first controllable silicon SCR 1.
Overvoltage protection triggers circuit and includes: rectifier bridge stack Z, first controllable silicon SCR the 1, second varistor RV2, second
Resistance R2, the 4th resistance R4, the 5th resistance R5, the second diode D2, the second capacitor C2, relay K and being connected with relay K
Dropout link gear T.
Overvoltage protection operation principle is: when the supply voltage being connected with this utility model RCCB exceedes in design
During voltage limit, the second varistor RV2 conductings, although now the second controllable silicon SCR 2 is also switched on, but owing to there being the 3rd diode
The buffer action of D3, the second varistor RVThe conducting electric current dividing potential drop on the 4th resistance R4 of 2 triggers the first controllable silicon SCR 1
Conducting, so that the relay K energized action being attached thereto, triggers dropout link gear T and makes disconnect switch SW disconnect.I.e. work as electricity
During source overtension (overvoltage), circuit breaker trip, thus play overvoltage protection effect.Second resistance R2 is current-limiting resistance, limit
Second varistor R during overtension processedV2 conducting electric currents, to protect the first controllable silicon SCR 1；Second capacitor C2 is used for absorbing
Interference signal prevents the first controllable silicon SCR 1 false triggering.
The first varistor R that the present embodiment usesV1 and the second varistor RVThe pressure sensitive voltage parameter of 2 is respectively
235V and 375V.
In order to verify the working condition of the RCCB of this utility model band overvoltage and low-voltage protection function, incite somebody to action this
Utility model band overvoltage power frequency supply adjustable with voltage with the RCCB power end of low-voltage protection function is connected.
When power frequency regulated power supply voltage is adjusted to below 165VAC, the first varistor RV1 leaks under this voltage
Electric current the least (being not turned on), the second controllable silicon SCR 2 is not turned on, and the dividing potential drop on the 4th resistor R4 is more than the first controllable silicon SCR 1
Trigger voltage, make the first controllable silicon SCR 1 turn on, after the first controllable silicon SCR 1 conducting, to be equivalent to rectifier bridge stack Z outfan short
Connecing, the relay K coil connected with rectifier bridge stack Z input obtains electric and action, triggers dropout link gear T and makes disconnect switch SW
Disconnect.
When power frequency regulated power supply voltage being adjusted to 165～265VAC scopes, the first varistor RV1 leakage current is bigger
(conducting), triggers the second controllable silicon SCR 2 and turns on, and reduces the dividing potential drop on the 4th resistance R4, make after the second controllable silicon SCR 2 conducting
The first controllable silicon SCR 1 be in cut-off state, dropout link gear T is failure to actuate, this supply voltage scope (165～
265VAC), this utility model has the RCCB of overvoltage protection and low-voltage protection and is in normal operating conditions.
When power frequency regulated power supply voltage is adjusted to more than 265VAC, the first varistor RV1 conducting, triggering second can
Control silicon SCR2 conducting, now the second varistor RV2 are also switched on, and have the 3rd diode D3 isolation, dividing on the 4th resistance R4
Pressure be enough to trigger the first controllable silicon SCR 1, is equivalent to rectifier bridge stack Z outfan short circuit, with rectification after the first controllable silicon SCR 1 conducting
The relay K coil energized action of bridge heap Z input series connection, triggers dropout link gear T and makes disconnect switch SW disconnect.
In the present embodiment, the first resistance to forcing up the targets of controllable silicon SCR 1 should be greater than 2.0 times of supply voltage peak value, and the present embodiment is adopted
With pressure 800V controllable silicon；Second controllable silicon SCR 2 chooses the resistance to forcing up the targets controllable silicon more than 25V；3rd resistance R3 resistance is
10 times of the resistance of four resistance R4；First diode D1 and the second diode D2 all uses 2.4V Zener diode；Three or two pole
Pipe D3 and the 4th diode D4 is without particular/special requirement, and the first resistance R2 and the second resistance R2 is current-limiting resistance, can use the resistance to be
100k to 500k low-power resistance；5th resistance R5 is as current-limiting resistance, but its resistance is relevant to residual operating current, this enforcement
Example uses 330 ohmages to make residual operating current be adjusted to 30mA；First capacitor C1 and the second capacitor C2 all uses 0.1
Micro farad capacitor.First controllable silicon SCR 1 and the second controllable silicon SCR 2 all safeguard one-way SCR.
Embodiment 2
The present embodiment 2 uses the first controllable silicon SCR 1 as the first thyristor, N-channel field effect transistor (NMOS)
As the second thyristor；Use the first varistor RV1, the second varistor RV2 respectively as the first voltage non-thread
Property device and the second non-linear to voltage device.
As in figure 2 it is shown, a kind of RCCB with overvoltage protection and low-voltage protection, compare with embodiment 1, this
Embodiment uses N-channel field effect transistor (NMOS) to replace the second controllable silicon SCR 2 in embodiment 1, each element connected mode with
Embodiment 1 is identical, and operation principle is same as in Example 1.The source S of N-channel field effect transistor NMOS of the present embodiment, drain D, grid
The negative electrode of the second controllable silicon SCR 2, anode, control pole in the most corresponding embodiment 1 of pole G.
The first varistor R that the present embodiment is usedV1 and the second varistor RVThe pressure sensitive voltage parameter of 2 is respectively
242V and 382V.
In order to verify the working condition of the RCCB of this utility model band overvoltage and low-voltage protection function, incite somebody to action this
Utility model band overvoltage power frequency supply adjustable with voltage with the RCCB power end of low-voltage protection function is connected.
When power frequency regulated power supply voltage is adjusted to below 170VAC, the first varistor RV1 leaks under this voltage
Electric current the least (being not turned on), field effect transistor NMOS is not turned on, and the dividing potential drop on the 4th resistor R4 is more than the first controllable silicon SCR 1
Trigger voltage, is equivalent to rectifier bridge stack Z outfan short circuit after the first controllable silicon SCR 1 conducting, connects with rectifier bridge stack Z input
Relay K coil obtain electric and action, trigger dropout link gear T and make disconnect switch SW disconnect.
When power frequency regulated power supply voltage being adjusted to 170～270VAC scopes, the first varistor RV1 leakage current is bigger
(conducting), triggers the conducting of field effect transistor NMOS, reduces the dividing potential drop on the 4th resistance R4 after the conducting of field effect transistor NMOS so that
First controllable silicon SCR 1 is in cut-off state, and dropout link gear T is failure to actuate, and this utility model has overvoltage protection and owes electricity
The RCCB of pressure protection is in normal operating conditions.
When power frequency regulated power supply voltage is adjusted to more than 270VAC, although now the first varistor RV1 conducting, touches
Send out the conducting of field effect transistor NMOS, due to now the second varistor RV2 are also switched on, and have the 3rd diode D3 isolation, the 4th electricity
Dividing potential drop on resistance R4 be enough to trigger the first controllable silicon SCR 1, is equivalent to rectifier bridge stack Z outfan after the first controllable silicon SCR 1 conducting
Short circuit, the relay K coil connected with rectifier bridge stack Z input obtains electric, triggers dropout link gear T and makes disconnect switch SW break
Open.
Component parameters selects: the present embodiment uses N-channel field effect transistor NMOS to replace the second controllable silicon in embodiment 1
SCR2, due to when circuit works this N-channel field effect transistor NMOS to bear voltage and current the least, so selecting trigger voltage ginseng
Number VT=1V, pressure 30V, the NMOS of maximum conducting electric current 1A；Other component parameters select same as in Example 1.
Embodiment 3
The present embodiment uses the first controllable silicon SCR 1 as thyristor 1, and the second controllable silicon SCR 2 is as partly leading
Body switch element 2；Use the first quasiconductor Transient Suppression Diode TVS1, the second quasiconductor Transient Suppression Diode TVS2 respectively
As non-linear to voltage device 1 and non-linear to voltage device 2.
As it is shown on figure 3, a kind of RCCB with overvoltage protection and low-voltage protection, compare with embodiment 1, this
Embodiment uses the first quasiconductor Transient Suppression Diode TVS1, the second quasiconductor Transient Suppression Diode TVS2 to replace reality respectively
Execute the first varistor R in example 1V1 and the second varistor RV2, each element connected mode is same as in Example 1, works former
Manage same as in Example 1.
The first quasiconductor Transient Suppression Diode TVS1 that the present embodiment is used, the second quasiconductor Transient Suppression Diode
The conducting voltage parameter of TVS2 is respectively 240V and 380V, owing to the first quasiconductor Transient Suppression Diode TVS1 and the second half leads
The most only by smaller current (the mA order of magnitude) during body Transient Suppression Diode TVS2 work conducting, so except requiring suitably to lead
Logical voltage parameter, other parameters are without considering especially.Other component parameters in the present embodiment select same as in Example 1.
In order to verify the working condition of the RCCB of this utility model band overvoltage and low-voltage protection function, incite somebody to action this
Utility model band overvoltage power frequency supply adjustable with voltage with the RCCB power end of low-voltage protection function is connected.
When power frequency regulated power supply voltage is adjusted to below 170VAC, the first quasiconductor Transient Suppression Diode TVS1 exists
Leakage current the least (being not turned on) under this voltage, the second controllable silicon SCR 2 is not turned on, and the dividing potential drop on the 4th resistor R4 is more than the
The trigger voltage of one controllable silicon SCR 1, is equivalent to rectifier bridge stack Z outfan short circuit, with rectification after the first controllable silicon SCR 1 conducting
The relay K coil of bridge heap Z input series connection obtains electric and action, triggers dropout link gear T and makes disconnect switch SW disconnect.
When power frequency regulated power supply voltage being adjusted to 170～270VAC scopes, the first quasiconductor Transient Suppression Diode
TVS1 leakage current is relatively big (conducting), triggers the second controllable silicon SCR 2 and turns on, and reduces the 4th electricity after the second controllable silicon SCR 2 conducting
Dividing potential drop on resistance R4 so that the first controllable silicon SCR 1 is in cut-off state, and dropout link gear T is failure to actuate, this utility model has
The RCCB having overvoltage protection and low-voltage protection is in normal operating conditions.
When power frequency regulated power supply voltage is adjusted to more than 270VAC, although now the first quasiconductor transient state suppresses two poles
Pipe TVS1 turns on, and triggers the second controllable silicon SCR 2 and turns on, owing to now the second quasiconductor Transient Suppression Diode TVS2 is also switched on,
And having the 3rd diode D3 isolation, the dividing potential drop on the 4th resistance R4 be enough to trigger the first controllable silicon SCR 1, the first controllable silicon SCR 1
Being equivalent to rectifier bridge stack Z outfan short circuit after conducting, the relay K coil connected with rectifier bridge stack Z input obtains electric, triggers de-
Button link gear T makes disconnect switch SW disconnect.
Embodiment of the present utility model is also not restricted by the embodiments, other any without departing from this utility model
Spirit and principle under made change, modify, substitute, combine, simplify, all should be the substitute mode of equivalence, all comprise
Within protection domain of the present utility model.
Claims (10)
1. there is the RCCB of overvoltage protection and low-voltage protection, it is characterised in that include the first semiconductor switch unit
Part, the second thyristor, the first non-linear to voltage element, the second non-linear to voltage element, the first diode, the first electricity
Resistance, the second resistance, the first capacitor, relay, zero sequence current mutual inductor and rectifier bridge stack；Described relay is linked by dropout
Mechanism is connected with disconnect switch, and the input of disconnect switch is connected with power supply, and the outfan of disconnect switch connects two copper cash, should
Article two, copper cash connects load after zero sequence current mutual inductor；The coil of relay is connected with the input of rectifier bridge stack, string
After connection, two ends are connected with two terminals of outfan of disconnect switch；
Described zero sequence current mutual inductor outfan one end is connected to rectifier bridge stack negative pole of output end, and the other end connects the 4th diode
Positive pole, the negative pole of the 4th diode and the 5th resistance one end be connected, and the other end of the 5th resistance is first with the first semiconductor switch
The control pole of part or grid are connected；The anode of the first conductor switch element is connected with rectifier bridge stack output head anode, and the first half lead
The negative electrode of body switch element is connected with rectifier bridge stack negative pole of output end；Second capacitor two ends are first with the first semiconductor switch respectively
The negative electrode of part or source electrode and control pole or delete and be connected；Second diode and the 4th resistor coupled in parallel, and corresponding second diode
The parallel connected end of positive pole be connected with the negative electrode of the first thyristor, the parallel connected end of the negative pole of corresponding second diode and the
The negative pole of four diodes connects；After second non-linear to voltage element and the second resistant series, one end is rectified with the output of rectifier bridge stack
The most connected, the negative pole of the other end and the 4th diode connects；The negative electrode of the second thyristor or source electrode and rectifier bridge stack
Negative pole of output end is connected, and anode or the drain electrode of the second thyristor are connected with one end of the 3rd resistance, the 3rd resistance
The other end is connected with the output head anode of rectifier bridge stack；The positive pole of the 3rd diode and the anode of the second thyristor or
Drain electrode is connected, and the negative pole of the 3rd diode and the negative pole of the 4th diode connect；First non-linear to voltage element and the first resistance
After series connection, one end is connected with the output head anode of rectifier bridge stack, the control pole of the other end and the second thyristor or grid
It is connected；First diode and the first capacitor are in parallel, the parallel connected end of corresponding first diode cathode and the second semiconductor switch unit
The control pole of part or grid are connected, and the corresponding parallel connected end of the first diode cathode is connected with the negative pole of output end of rectifier bridge stack.
The RCCB with overvoltage protection and low-voltage protection the most according to claim 1, it is characterised in that institute
State RCCB and also include test resistance and test button；Test resistance connect with test button after one end and disconnect switch
One outfan is directly connected to, and the line of the other end is connected with another outfan of disconnect switch.
The RCCB with overvoltage protection and low-voltage protection the most according to claim 1, it is characterised in that
Described first thyristor and the second thyristor are all one-way SCR, bidirectional triode thyristor or field effect
Pipe.
The RCCB with overvoltage protection and low-voltage protection the most according to claim 1, it is characterised in that institute
State the first non-linear to voltage element and the second non-linear to voltage element is varistor or quasiconductor transient voltage suppressor diode.
The RCCB with overvoltage protection and low-voltage protection the most according to claim 3, it is characterised in that institute
State the first thyristor and the second thyristor all selects one-way SCR, the respectively first one-way SCR
With the second one-way SCR；The first resistance to forcing up the targets of one-way SCR is more than 2 times of supply voltage peak value, and the second one-way SCR selects
Take the resistance to forcing up the targets controllable silicon more than 25V；3rd resistance is 10 times of the resistance of the 4th resistance；First diode and second
Diode all uses 2.4V Zener diode；First resistance and the second resistance are current-limiting resistance, and using resistance is that 100k 500k is low
Power resistor；5th resistance, as current-limiting resistance, uses 330 ohmages；First capacitor and the second capacitor all use 0.1
Micro farad capacitor.
The RCCB with overvoltage protection and low-voltage protection the most according to claim 5, it is characterised in that institute
State the first one-way SCR and use pressure 800V controllable silicon.
The RCCB with overvoltage protection and low-voltage protection the most according to claim 1, it is characterised in that adopt
With the first controllable silicon as the first thyristor, N-channel field effect transistor is as the second thyristor；Use the
One varistor and the second varistor are respectively as the first non-linear to voltage device and the second non-linear to voltage device.
The RCCB with overvoltage protection and low-voltage protection the most according to claim 7, it is characterised in that institute
State N-channel field effect transistor and select trigger voltage parameter VTFor 1V, pressure 30V, the field effect transistor of maximum conducting electric current 1A；Described
The pressure sensitive voltage parameter of one varistor and the second varistor is respectively 242V and 382V；3rd resistance is the 4th resistance
10 times of resistance；First diode and the second diode all use 2.4V Zener diode；First resistance and the second resistance are
Current-limiting resistance, using resistance is 100K 500K low-power resistance；5th resistance, as current-limiting resistance, uses 330 ohmages；
First capacitor and the second capacitor all use 0.1 micro farad capacitor.
The RCCB with overvoltage protection and low-voltage protection the most according to claim 1, it is characterised in that institute
State the first thyristor and one-way SCR the most all selected by the second thyristor, respectively first unidirectional can
Control silicon and the second one-way SCR；Described first non-linear to voltage element and the second non-linear to voltage element were the first quasiconductor wink
State suppression diode and the second quasiconductor Transient Suppression Diode.
The RCCB with overvoltage protection and low-voltage protection the most according to claim 9, it is characterised in that
The conducting voltage parameter of described first quasiconductor Transient Suppression Diode and the second quasiconductor Transient Suppression Diode is respectively
240V and 380V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620715352.XU CN205846698U (en) | 2016-07-07 | 2016-07-07 | There is the RCCB of overvoltage protection and low-voltage protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620715352.XU CN205846698U (en) | 2016-07-07 | 2016-07-07 | There is the RCCB of overvoltage protection and low-voltage protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205846698U true CN205846698U (en) | 2016-12-28 |
Family
ID=58150910
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620715352.XU Withdrawn - After Issue CN205846698U (en) | 2016-07-07 | 2016-07-07 | There is the RCCB of overvoltage protection and low-voltage protection |
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| Country | Link |
|---|---|
| CN (1) | CN205846698U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106026017A (en) * | 2016-07-07 | 2016-10-12 | 华南理工大学 | Leakage breaker with over-voltage protection and under-voltage protection |
-
2016
- 2016-07-07 CN CN201620715352.XU patent/CN205846698U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106026017A (en) * | 2016-07-07 | 2016-10-12 | 华南理工大学 | Leakage breaker with over-voltage protection and under-voltage protection |
| CN106026017B (en) * | 2016-07-07 | 2019-01-18 | 华南理工大学 | A kind of leakage circuit breakers with overvoltage protection and low-voltage protection |
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Granted publication date: 20161228 Effective date of abandoning: 20190118 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20161228 Effective date of abandoning: 20190118 |