CN205565678U - Overvoltage protector - Google Patents
Overvoltage protector Download PDFInfo
- Publication number
- CN205565678U CN205565678U CN201620367387.9U CN201620367387U CN205565678U CN 205565678 U CN205565678 U CN 205565678U CN 201620367387 U CN201620367387 U CN 201620367387U CN 205565678 U CN205565678 U CN 205565678U
- Authority
- CN
- China
- Prior art keywords
- power line
- circuit
- reference voltage
- outfan
- voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses an overvoltage protector, include and be used for acquireing power wire output's alternating voltage and carrying out the rectification to it and handle sampling circuit, the reference voltage generating circuit who is used for generating reference voltage who exports the DC voltage, the size that is used for comparison DC voltage and reference voltage to control the comparison circuit that switches on between self first output and the second output when the DC voltage is greater than reference voltage, is used for the circuit breaker of deenergization line and is used for controlling the release of circuit breaker disconnection. The utility model discloses can be on the power cord control circuit breaker deenergization line during overtension, the load of having avoided linking to each other with the power cord received the high voltage and the circumstances about burning out appears, the security is high.
Description
Technical field
This utility model relates to supply line's resist technology field, particularly relates to a kind of overvoltage protection dress
Put.
Background technology
In order to ensure the normal work of supply line, need in supply line, arrange chopper, ensure to work as
Timely open-circuit line when supply line occurs abnormal, thus avoid being connected to supply line and with supply line
Load cause damage.
But, the protection mechanism of current supply line mostly is overcurrent protection and earth leakage protective etc., and when supplying
Open circuit can not be carried out in time during voltage excessive (such as effects of lightning etc.) in electric line, cause and power supply
The load that circuit is connected is easily subject to overvoltage and burns out, and safety is low.
Therefore, the overvoltage protection how providing a kind of safety high is that those skilled in the art need at present
Problem to be solved.
Utility model content
The purpose of this utility model is to provide a kind of overvoltage protection, it is possible to overtension on the power line
Time control chopper deenergization line, it is to avoid the load being connected with power line is burnt out by too high voltages
Situation occurs, safety is high.
For solving above-mentioned technical problem, this utility model provides a kind of overvoltage protection, including for
Obtain the alternating voltage of power line output and it is carried out rectification process the output sample circuit of DC voltage, use
In generating the reference voltage generating circuit of reference voltage, for relatively described DC voltage and described reference voltage
Size, and control self the first outfan and second when described DC voltage is more than described reference voltage
The comparison circuit of conducting between outfan, for disconnecting the chopper of described power line and described for controlling
The electrical apparatus release that chopper disconnects；Wherein:
The input of described sample circuit is connected with described power line, and the outfan of described sample circuit is with described
The positive input terminal of comparison circuit is connected；
The outfan of described reference voltage generating circuit is connected with the negative input end of described comparison circuit；
First end of described electrical apparatus release is connected with the first outfan of described comparison circuit, and passes through fairing
It is connected with described power line；Second end of described electrical apparatus release is connected with the second outfan of described comparison circuit.
Preferably, described comparison circuit is photo-coupler；Described overvoltage protection also includes for for institute
Stating electrical apparatus release and provide the silicon controlled rectifier of starting current, the positive pole of described silicon controlled rectifier is with described
Second end of electrical apparatus release is connected, the first end phase of the negative pole of described silicon controlled rectifier and described electrical apparatus release
Even, the trigger electrode of described silicon controlled rectifier is connected with the second outfan of described comparison circuit.
Preferably, described power line is single phase poaer supply line.
Preferably, described fairing includes multiple diode being cascaded.
Preferably, described power line is three-phase four-wire power line, and mutually the most described power line is provided with one
Described sample circuit, a described reference voltage generating circuit and a described comparison circuit, and on three-phase
The first outfan of three described comparison circuits respectively the most corresponding connected with the second outfan.
Preferably, described fairing includes the multiple diodes being connected on respectively on power line described in each phase,
Wherein, on mutually the most described power line, the number of the described diode of series connection is no less than one.
Preferably, described electrical apparatus release is magnetictrip.
Preferably, described reference voltage generating circuit is three end adjustable shunt reference voltage sources.
This utility model provides a kind of overvoltage protection, generates electricity including sample circuit, reference voltage
Road, comparison circuit, electrical apparatus release and chopper, when the DC voltage of sample circuit output is more than reference voltage
Time, show the overtension on power line, now comparison circuit controls self the first outfan and second defeated
Going out and turn between end, on electrical apparatus release, energising starts, thus controls chopper deenergization line.Therefore this practicality is new
Type can on the power line overtension time control chopper deenergization line, it is to avoid be connected with power line
The situation that load is burnt out by too high voltages occurs, safety is high.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme in this utility model embodiment, below will to prior art and
In embodiment, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only
It is only embodiments more of the present utility model, for those of ordinary skill in the art, is not paying creation
Property work on the premise of, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
The structural representation of a kind of overvoltage protection that Fig. 1 provides for this utility model；
The electrical block diagram of a kind of overvoltage protection that Fig. 2 provides for this utility model；
Wherein, in Fig. 2:
Taking in the sample circuit in BR1 A phase, the sample circuit in BR2 B phase, BR3 C phase
Sample circuit, R6, R13, R17 adjustable resistance, TL431I tri-end adjustable shunt reference voltage source, OCA
Photo-coupler in photo-coupler in A phase, the photo-coupler in OCB B phase, OCC C phase,
TK electrical apparatus release, R8 varistor, T1 silicon controlled rectifier, D10, D11, D12, D13
Fairing in Zener diode, D7～D9 A phase, the fairing in D4～D6 B phase,
Fairing in D1～D3 C phase.
Detailed description of the invention
Core of the present utility model is to provide a kind of overvoltage protection, it is possible to overtension on the power line
Time control chopper deenergization line, it is to avoid the load being connected with power line is burnt out by too high voltages
Situation occurs, safety is high.
For making the purpose of this utility model embodiment, technical scheme and advantage clearer, below in conjunction with this
Accompanying drawing in utility model embodiment, carries out clear, complete to the technical scheme in this utility model embodiment
Ground describes, it is clear that described embodiment is a part of embodiment of this utility model rather than whole realities
Execute example.Based on the embodiment in this utility model, those of ordinary skill in the art are not making creative labor
The every other embodiment obtained under dynamic premise, broadly falls into the scope of this utility model protection.
This utility model provides a kind of overvoltage protection, shown in Figure 1, and Fig. 1 is that this practicality is new
The structural representation of a kind of overvoltage protection that type provides；
This device includes the alternating voltage for obtaining power line output and it is carried out rectification process output directly
Flow the sample circuit 11 of voltage, for generating the reference voltage generating circuit 12 of reference voltage, being used for comparing
The size of DC voltage and reference voltage, and the first defeated of self is controlled when DC voltage is more than reference voltage
Go out end with the second outfan between conducting comparison circuit 13, for deenergization line chopper 15 and
For controlling the electrical apparatus release 14 that chopper 15 disconnects；Wherein:
The input of sample circuit 11 is connected with power line, the outfan of sample circuit 11 and comparison circuit
The positive input terminal of 13 is connected；
The outfan of reference voltage generating circuit 12 is connected with the negative input end of comparison circuit 13；
First end of electrical apparatus release 14 is connected with the first outfan of comparison circuit 13, and passes through fairing
16 are connected with power line；Second end of electrical apparatus release 14 is connected with the second outfan of comparison circuit 13.
It is understood that when DC voltage is more than reference voltage, show that the magnitude of voltage on power line is too high,
Now turn between the first outfan and second outfan of comparison circuit 13, and then make the of electrical apparatus release 14
Between one end and the second end, conducting forms loop, owing to electrical apparatus release 14 first end is by fairing 16 and electricity
Source line is connected, so time electrical apparatus release 14 band electrically activate, thus control chopper 15 and trip, deenergization line.
As preferably, comparison circuit 13 is photo-coupler；Overvoltage protection also includes for for de-
Button device 14 provides the silicon controlled rectifier of starting current, the positive pole of silicon controlled rectifier and electrical apparatus release 14
The second end be connected, the negative pole of silicon controlled rectifier is connected with the first end of electrical apparatus release 14, and controllable silicon is whole
The trigger electrode of fluid element is connected with the second outfan of comparison circuit 13.
It is understood that when comparison circuit 13 is photo-coupler, when turning on due to photo-coupler, the
Electric current between one outfan and the second outfan is the least, is not enough to support that electrical apparatus release 14 starts, therefore needs
Increase silicon controlled rectifier and the starting current of electrical apparatus release 14 is provided.As in figure 2 it is shown, Fig. 2 is this reality
Electrical block diagram with a kind of overvoltage protection of novel offer；The first output when photo-coupler
Between end and the second outfan during conducting, between trigger electrode and the negative pole of silicon controlled rectifier, form loop,
Triggering and turn between the both positive and negative polarity of silicon controlled rectifier, now electrical apparatus release 14 passes through silicon controlled rectifier
Forming loop, electric current is sufficiently large, can support that electrical apparatus release 14 starts.It addition, it is whole with controllable silicon in Fig. 2
The effect of the varistor that fluid element is in parallel is when silicon controlled rectifier powers on and flows through big, plays shunting
Effect, it is to avoid big electric current burns out silicon controlled rectifier.
Certainly, comparison circuit 13 can also use other kinds of components and parts, such as can be by control chip
Form with switching component, as long as being capable of the comparison circuit 13 of above-mentioned functions all of the present utility model
Within protection domain.
Wherein, power line here is single phase poaer supply line.Shown in Figure 2, overvoltage protection dress now
Put and only include A phase power line and zero line and the circuit part being connected with A phase power line.
It is further known that, now fairing 16 includes multiple diode being cascaded.
It addition, power line here can also be three-phase four-wire power line, every phase power line is provided with one
11, reference voltage generating circuit 12 of individual sample circuit and a comparison circuit 13, and on three-phase
First outfan of three comparison circuits 13 is the most corresponding with the second outfan to be connected.It is shown in Figure 2,
Now the most corresponding in parallel with the two of OCA outfans of two outfans of OCB with OCC.
It is further known that, now fairing 16 includes multiple two poles being connected on respectively on each phase power line
Pipe, wherein, on every phase power line, the number of the diode of series connection is no less than one.
Wherein, every phase power line can be connected respectively 3 diodes.It is understood that here whole
The effect of stream device 16 is the electric current of conveying on power line to be carried out halfwave rectifier process obtain unidirectional current, if
Only with a diode on every phase power line, reverse voltage endurance capability is inadequate, easily causes diode quilt
Reverse breakdown.Certainly, these are only that preferred version, this utility model are not limiting as on every phase power line series connection
The number of diode.
Meanwhile, when power line is three-phase four-wire power line, the outfan phase of the fairing 16 gone up mutually
After Lian, the first end with electrical apparatus release 14 is connected, as long as thus ensureing to have in a phase have electric electrical apparatus release 14 that is permissible
Having starting current, reliability is higher.
It addition, this utility model is for AC low-tension circuit, therefore when power line is single phase poaer supply line, base
Quasi-voltage is 220V, and when power line is three-phase four-wire power line, reference voltage is 380V.
As preferably, electrical apparatus release 14 here is magnetictrip.
It is understood that magnetictrip includes coil and magnetic core, when, after coil electricity, open circuit being promoted
Device 15 trips.It is of course also possible to use other kinds of electrical apparatus release 14, this is not limited by this utility model
Fixed.
Wherein, reference voltage generating circuit 12 here is three end adjustable shunt reference voltage sources.Can also
Using other kinds of reference voltage generating circuit 12, this is not construed as limiting by this utility model.
This utility model provides a kind of overvoltage protection, generates electricity including sample circuit, reference voltage
Road, comparison circuit, electrical apparatus release and chopper, when the DC voltage of sample circuit output is more than reference voltage
Time, show the overtension on power line, now comparison circuit controls self the first outfan and second defeated
Going out and turn between end, on electrical apparatus release, energising starts, thus controls chopper deenergization line.Therefore this practicality is new
Type can on the power line overtension time control chopper deenergization line, it is to avoid be connected with power line
The situation that load is burnt out by too high voltages occurs, safety is high.
It should be noted that in this manual, the relational terms of such as first and second or the like is only used
One entity or operation are separated with another entity or operating space, and not necessarily requires or imply
Relation or the order of any this reality is there is between these entities or operation.And, term " includes ",
" comprise " or its any other variant is intended to comprising of nonexcludability, so that include a series of wanting
Process, method, article or the equipment of element not only include those key elements, but also include being not expressly set out
Other key elements, or also include the key element intrinsic for this process, method, article or equipment.
In the case of there is no more restriction, statement " including ... " key element limited, it is not excluded that at bag
Include and the process of described key element, method, article or equipment there is also other identical element.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses this
Utility model.Multiple amendment to these embodiments will be aobvious and easy for those skilled in the art
Seeing, generic principles defined herein can be in the situation without departing from spirit or scope of the present utility model
Under, realize in other embodiments.Therefore, this utility model be not intended to be limited to shown in this article these
Embodiment, and it is to fit to the widest scope consistent with principles disclosed herein and features of novelty.
Claims (8)
1. an overvoltage protection, it is characterised in that include the exchange for obtaining power line output
Voltage also carries out the sample circuit of rectification process output DC voltage, for generating the benchmark of reference voltage to it
Voltage generation circuit, size for relatively described DC voltage with described reference voltage, and at described direct current
The ratio of conducting between the first outfan of self and the second outfan is controlled when voltage is more than described reference voltage
Relatively circuit, for disconnect described power line chopper and for control described chopper disconnect dropout
Device；Wherein:
The input of described sample circuit is connected with described power line, and the outfan of described sample circuit is with described
The positive input terminal of comparison circuit is connected；
The outfan of described reference voltage generating circuit is connected with the negative input end of described comparison circuit；
First end of described electrical apparatus release is connected with the first outfan of described comparison circuit, and passes through fairing
It is connected with described power line；Second end of described electrical apparatus release is connected with the second outfan of described comparison circuit.
Device the most according to claim 1, it is characterised in that described comparison circuit is photo-coupler；
Described overvoltage protection also includes the silicon controlled rectifier unit for providing starting current for described electrical apparatus release
Part, the positive pole of described silicon controlled rectifier is connected with the second end of described electrical apparatus release, described silicon controlled rectifier
The negative pole of element is connected with the first end of described electrical apparatus release, and the trigger electrode of described silicon controlled rectifier is with described
Second outfan of comparison circuit is connected.
Device the most according to claim 1, it is characterised in that described power line is single phase poaer supply line.
Device the most according to claim 3, it is characterised in that described fairing includes multiple string
The diode being linked togather.
Device the most according to claim 1, it is characterised in that described power line is three-phase and four-line electricity
Source line, mutually the most described power line is provided with a described sample circuit, a described reference voltage generation
Circuit and a described comparison circuit, and the first outfan of three described comparison circuits on three-phase and
Two outfans correspondence respectively is connected.
Device the most according to claim 5, it is characterised in that described fairing includes going here and there respectively
The multiple diodes being associated on power line described in each phase, wherein, described two that mutually the most described power line is connected
The number of pole pipe is no less than one.
Device the most according to claim 1, it is characterised in that described electrical apparatus release is magnetictrip.
Device the most according to claim 1, it is characterised in that described reference voltage generating circuit is
Three end adjustable shunt reference voltage sources.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620367387.9U CN205565678U (en) | 2016-04-27 | 2016-04-27 | Overvoltage protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620367387.9U CN205565678U (en) | 2016-04-27 | 2016-04-27 | Overvoltage protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205565678U true CN205565678U (en) | 2016-09-07 |
Family
ID=56807886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620367387.9U Expired - Fee Related CN205565678U (en) | 2016-04-27 | 2016-04-27 | Overvoltage protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205565678U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107911038A (en) * | 2017-12-12 | 2018-04-13 | 成都爱特联科技有限公司 | Power-supply system based on over-and under-voltage design protection |
-
2016
- 2016-04-27 CN CN201620367387.9U patent/CN205565678U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107911038A (en) * | 2017-12-12 | 2018-04-13 | 成都爱特联科技有限公司 | Power-supply system based on over-and under-voltage design protection |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160907 Termination date: 20180427 |