CN106329504A - Backup protection circuit breaker of surge protector and application method of backup protection circuit breaker - Google Patents
Backup protection circuit breaker of surge protector and application method of backup protection circuit breaker Download PDFInfo
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- CN106329504A CN106329504A CN201510373048.1A CN201510373048A CN106329504A CN 106329504 A CN106329504 A CN 106329504A CN 201510373048 A CN201510373048 A CN 201510373048A CN 106329504 A CN106329504 A CN 106329504A
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- current
- backup protection
- surge protector
- control unit
- detection
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Abstract
A backup protection circuit breaker of a surge protector comprises a mechanical contact, a current transformer, a detection and control unit and a tripper assembly, wherein the mechanical contact is used for closing or breaking electrical connection of the surge protector and a trunk circuit, the current transformer is provided with an energization circuit in a penetrating way, the energization circuit is connected to the surge protector from the trunk circuit, the current transformer is used for sensing a current size of the energization circuit, the detection and control unit is used for judging whether the current size lies within a preset range or not and generating a current pulse signal if the current size is larger than the preset range, the tripper assembly is actuated in response to the current pulse signal so as to drive the mechanical contact to break the electrical connection.
Description
Technical field
The application relates to a kind of backup protection breaker for surge protector and the method wherein used.
Background technology
Surge protector (SPD) by detecting that the generation of surge current is changed into low resistance state, thus
Can release surge current, the safety of the power circuit that protection is in parallel.For traditional surge protector
Back-up protection device, typically use miniature circuit breaker (MCB) or fuse.Because tolerating certain
Surge current, the rated current of miniature circuit breaker or fuse have to be sufficiently high.But, at electricity
Surge protector produces the overcurrent in addition to surge current (such as from 1 ampere to miniature circuit breaker
Or the overcurrent of 5 times of the rated current of fuse) time, miniature circuit breaker or fuse can not be fast
Overcurrent is opened in quick-break, thus causes the varistor short circuit in surge protector to be burnt, and causes safety to ask
Topic.
In terms of data, miniature circuit breaker is typically greater than 5 times of rated current could start to thread off, but
Even if be the varistor in surge protector (be 63 amperes according to general rated current at 300 amperes
Calculating, less than 5 times of rated current) time of being resistant to below has been much smaller than 100 milliseconds,
In the shortest time, common miniature circuit breaker cannot in time turn-off current to protect varistor.For
For fuse, because rated current is selected the highest, and self fusing feature, its overload protection performance
Worse, it can be made to carry out the electric current of action in 100 milliseconds also much larger than 5 times of rated current, come at all
Not as good as protection varistor.
Summary of the invention
According to an aspect of this disclosure, it is provided that a kind of backup protection breaker for surge protector,
Comprising: mechanical contact, for being switched on or switched off the electrical connection of described surge protector and backbone circuits；
Current transformer, wherein through there being the conductive track being connected to described surge protector from described backbone circuits,
Described current transformer is in order to sense the size of current in described conductive track；Detection and control unit, sentence
Whether disconnected described size of current is in preset range, if described size of current is in described preset range,
Then generate current pulse signal；And electrical apparatus release assembly, it activated in response to described current pulse signal,
To drive described mechanical contact to disconnect described electrical connection.
According to another aspect of the disclosure, it is provided that a kind of backup protection breaker for surge protector
The method of middle use, including: Current Mutual Inductance step, sense connecting from backbone circuits through current transformer
Receive the size of current in the conductive track of described surge protector；Current impulse generation step, it is judged that institute
State whether size of current is in preset range, if described size of current is in described preset range, then
Generate current pulse signal；Dropout step, in response to described current pulse signal, drives mechanical contact to break
Open the electrical connection of described surge protector and described backbone circuits.
The special backup protection breaker of surge protector that the disclosure provides and the method wherein used, profit
By detection and control unit and realize overcurrent and short circuit by the electrical apparatus release assembly of miniature circuit breaker
The function quickly disconnected under electric current, it can provide at overcurrent and short circuit current to surge protector
In the case of gamut protection.
Accompanying drawing explanation
Combining from the specific embodiment of the disclosure the following description of accompanying drawing, other advantages and features will become
Becoming apparent from substantially, these specific embodiments are merely to nonrestrictive purpose and shown in the drawings,
Reference same in accompanying drawing is for representing same parts or unit, wherein:
Fig. 1 is to illustrate the backup protection breaker for surge protector according to embodiment of the disclosure
Schematic block diagram；
Fig. 2 (a) to Fig. 2 (d) be illustrate another embodiment according to the disclosure for surge protector
Backup protection breaker structure arrange block diagram；And
Fig. 3 is to illustrate according in the backup protection breaker for surge protector that embodiment of the disclosure
The flow chart of the method used.
Detailed description of the invention
It is more fully described the specific embodiment of the disclosure below with reference to accompanying drawings.Although accompanying drawing shows
Multiple specific embodiments of the disclosure, however, it is to be appreciated that may be realized in various forms the disclosure and not
Should be limited by embodiments set forth here.On the contrary, it is provided that these embodiments are to make the disclosure be managed
Solve more thorough and complete, and the scope of the present disclosure intactly can be conveyed to the technology of this area
Personnel.
Fig. 1 is to illustrate the backup protection breaker for surge protector according to embodiment of the disclosure
Schematic block diagram.
As it is shown in figure 1, according to the backup protection breaker for surge protector that embodiment of the disclosure
100 are connected between backbone circuits 101 and surge protector 102, wherein backbone circuits 101 such as but
It is not limited to include four conductive track L1, L2, L3, N.In conductive track L1, L2, L3, N
Each by backup protection breaker 100 respectively with surge protector 1021、1022、1023、1024
(following do not refer in particular to time be collectively expressed as 102) in one be connected.According to another of the disclosure
Individual embodiment, backbone circuits 101 can include less or more conductive track, the quantity of conductive track
Can determine according to the concrete requirement of power system.
As it is shown in figure 1, backup protection breaker 100 can include one or more current transformer 1031、
1032、1033、1034(following do not refer in particular to time be collectively expressed as 103).The most such as, live wire
Road L1 passes current transformer 1031With surge protector 1021Being connected, conductive track L2 is mutual through electric current
Sensor 1032With surge protector 1022Being connected, conductive track L3 passes current transformer 1033With surge
Protector 1023Being connected, conductive track N passes current transformer 1034With surge protector 1024It is connected.
It is connected to surge protector 102 from backbone circuits 101 owing to each current transformer 103 passing to have
In conductive track L1, L2, L3, N one, it is possible to the size of current in sensing conductive track.
As it is shown in figure 1, backup protection breaker 100 can include one or more mechanical contact 1041、
1042、1043、1044(following do not refer in particular to time be collectively expressed as 104).These mechanical contacts 104
It is connected between conductive track L1, L2, L3, N and current transformer 103, or connects respectively
Any position between conductive track L1, L2, L3, N and surge protector 102, for connect or
Disconnect the electrical connection of surge protector 102 and backbone circuits 101.
As it is shown in figure 1, backup protection breaker 100 can include detection and control unit 105.Detection
It is connected with current transformer 103 with control unit 105, is felt to represent from current transformer 103 reception
The signal of the size of current in the described conductive track surveyed.Detection and control unit 105 are always according to described letter
Number judge whether the described size of current in described conductive track is in preset range, if described electric current
Size is in described preset range, then generate current pulse signal.One according to the disclosure unrestricted
Property embodiment, above-mentioned preset range may refer to 1 ampere (A) to described backup protection breaker 100
The scope of 5 times of rated current.The rated current of backup protection breaker 100 refers to that this equipment is just
Often allow the maximum current passed through during work.In this case, it is assumed that rated current is 63A, then
Above-mentioned preset range is 1A to 315A.
The concrete numerical value scope the most of this disclosure of above-mentioned preset range is construed as limiting, another according to the disclosure
One non-limiting example, owing to the current transformer 103 according to the disclosure can sense milliampere (mA)
Level electric current is to the scope of kilo-ampere (KA) level electric current, and the most above-mentioned preset range can also be milliampere level electric current
Any less scope to the scope of kilo-ampere level electric current, or this scope.As an example, should
Scope is such as but not limited to being the scope of 10mA to 100KA, or the scope of 10A to 10KA, etc.
Deng.
An embodiment according to the disclosure, above-mentioned detection and control unit 105 can be, but not limited to by believing
Number filter circuit and dedicated test chip realize.
As it is shown in figure 1, backup protection breaker 100 can include electrical apparatus release assembly 106.Electrical apparatus release group
One end of part 106 is connected to mechanical contact 104, and the other end is connected with detection and control unit 105.
Electrical apparatus release assembly 106 activated in response to detection and the current pulse signal of control unit 105 generation,
To drive mechanical contact 1041、1042、1043、1044In one or more disconnect surge protector
102 with the electrical connection of backbone circuits 101.
An embodiment according to the disclosure, backup protection breaker 100 also includes power supply power supply unit
107.Power supply power supply unit 107 1 aspect electrically connects with described conductive track, with power taking from which, another
Aspect electrically connects with detection and control unit 105 and electrical apparatus release assembly 106, with to described detection respectively
Power supply is provided with control unit 105 and described electrical apparatus release assembly 106.Power supply power supply unit 107 also has
One terminal and simulation it is connected.An embodiment according to the disclosure, above-mentioned power supply power supply unit 107
Can be, but not limited to be realized by rectification voltage reduction module.
An embodiment according to the disclosure, electrical apparatus release assembly 106 one end is connected to power supply power supply unit
107, also terminal and simulation it is connected, and is connecting between electrical apparatus release assembly 106 in simulation
There is switch controller 108.Switch controller 108 has a terminal and detection and control unit 105 defeated
Go out end to be connected, to receive the current pulse signal of detection and control unit 105 generation as control signal.
When switch controller 108 receives current pulse signal from detection and control unit 105, control switch
Controller 108 turn on by power supply power supply unit 107, electrical apparatus release assembly 106 and simulation constitute logical
Electricity loop so that electrical apparatus release assembly 106 activated, and then make electrical apparatus release assembly 106 drive machinery to touch
104 electrical connections disconnecting surge protectors 102 and backbone circuits 101.A reality according to the disclosure
Executing example, above-mentioned switch controller 108 such as can be, but not limited to be switching transistor element.
According to another embodiment of the disclosure, the detection in backup protection breaker 100 and control unit
105 can also judge the state whether varistor in surge protector 102 deteriorates and deteriorate.Tool
Body ground, when surge protector 102 normally works, if detection and control unit 105 judge
Flow through the electric current of conductive track between backbone circuits 101 and surge protector 102 process over time
And be gradually increased, then may determine that the varistor in surge protector 102 exists deterioration condition, and can
To judge its deterioration state, the degree i.e. deteriorated.
According to another embodiment of the disclosure, the detection in backup protection breaker 100 and control unit
105 can also judge to flow through the electric current of the conductive track between backbone circuits 101 and surge protector 102
Whether it is surge current, it is possible to calculate the number of times that surge current occurs.
In the disclosure, each conductive track towards surge protector 102 has a current transformer
103 are used for detecting the size of the electric current flowing through surge protector 102, and power supply power supply unit 107 is then from master
Dry circuit 101 power taking, provides power supply, detection and control unit 105 to whole backup protection breaker 100
Output current pulse signal be used for control electrical apparatus release assembly 106 so that this current pulse signal can so that
Dynamic electrical apparatus release assembly 106, and thus make mechanical contact 104 disconnect rapidly surge protector 102 and trunk
The electrical connection of circuit 101.
When the varistor in surge protector 102 flows through overcurrent because of overvoltage, (such as 1 pacifies
5 times of electric currents the most higher of the training extremely rated current of described backup protection breaker 100) time, pressure-sensitive
The time that resistance is resistant to is limited, without the outside quick turn-off current of disconnector, pressure-sensitive electricity
Resistance can be quickly short-circuit until burning.The backup protection breaker of this surge protector 102 according to the disclosure
100 because making Current Transformer and detection of electrons and control unit etc., it is possible at such as 30ms (in the least
Second) within disconnect rapidly overcurrent, it is to avoid the burning of varistor in surge protector and there is safety
Accident.
Backup protection breaker 100 according to the disclosure is by mechanical contact 104 therein and electrical apparatus release group
Part 106 (can be such as magnetic trip assembley therefor) is capable of 25kA (kiloampere) the most higher short circuit
Current protecting function.
Backup protection breaker 100 according to the disclosure can tolerate 8/20 certain surge current, its
Surge protector 102 release the normal work of surge current time be failure to actuate.Above-mentioned 8/20 surge current refers to
Peak value can be reached at 8 μ s, and 20 μ s thereafter drop to the surge current of half of peak value.
Backup protection breaker 100 according to the disclosure, can by detection and the function of control unit 105
With the deterioration state of the varistor (not shown) in monitoring surge protector 102, calculate surge current
The number of times occurred.Further, at the backup protection breaker 100 of the surge protector 102 according to the disclosure
In, surge current does not flows through detection and control unit 105, it is to avoid backup protection breaker 100 liang
End produces unnecessary residual voltage.
Fig. 2 (a) to Fig. 2 (d) be illustrate another embodiment according to the disclosure for surge protector
Backup protection breaker structure arrange block diagram.
As in figure 2 it is shown, include according to the backup protection breaker 200 of the disclosure: current transformer 203,
Detection and control unit 205, mechanical contact and electrical apparatus release assembly 210.Here, mechanical contact and electrical apparatus release
Assembly 210 is equivalent to the combination of the function of mechanical contact 104 and electrical apparatus release assembly 106 in previous embodiment.
As shown in (a) in Fig. 2, the current transformer 203 in backup protection breaker 200 is arranged in
Mechanical contact and the lower section of electrical apparatus release assembly 210, constitute L-type splicing with detection and control unit 205.
Here, the implication of L-type refers to current transformer 203 and detection and the connection layout side of control unit 205
Formula is close to English alphabet " L ", and wherein current transformer 203 is equivalent to the horizontal stroke of bottom of L, detection and
Control unit 205 is equivalent to the perpendicular of L.In (a) of Fig. 2, current transformer 203 and detection and control
The L that unit 205 processed is constituted is positioned at mechanical contact and the right side of electrical apparatus release assembly 210.
As shown in (b) in Fig. 2, the current transformer 203 in backup protection breaker 200 is arranged in
Mechanical contact and the lower section of electrical apparatus release assembly 210, constitute L-type with described detection and control unit 205 and spell
Connect.In (b) of Fig. 2, the L that current transformer 203 is constituted with detection and control unit 205 is positioned at
Mechanical contact and the left side of electrical apparatus release assembly 210.
As shown in (c) in Fig. 2, the current transformer 203 in backup protection breaker 200 is arranged in
Detection and the lower section of control unit 205, constitute left right model splicing with mechanical contact and electrical apparatus release assembly 210.
In (c) of Fig. 2, current transformer 203 and detection and control unit 205 are positioned at mechanical contact and take off
The right side of button device assembly 210.
As shown in (d) in Fig. 2, the current transformer 203 in backup protection breaker 200 is arranged in
Detection and the lower section of control unit 205, constitute left right model splicing with mechanical contact and electrical apparatus release assembly 210.
In (d) of Fig. 2, current transformer 203 and detection and control unit 205 are positioned at mechanical contact and take off
The left side of button device assembly 210.
Fig. 3 is to illustrate according in the backup protection breaker for surge protector that embodiment of the disclosure
The flow chart of the breaking method used.
As it is shown on figure 3, in step S301, sense being connected to from backbone circuits through current transformer
Size of current in the conductive track of surge protector.In step s 302, it is judged that described size of current is
No it is in preset range, if described size of current is in described preset range, then generates current impulse
Signal.In step S303, in response to the generation of described current pulse signal, driven by electrical apparatus release assembly
Dynamic mechanical contact disconnects the electrical connection of described surge protector and described backbone circuits.
In the above-described embodiments, step S301 is by the current transformer 103 shown in Fig. 1 or figure
Current transformer 203 shown in 2 realizes, and step S302 is by the detection shown in Fig. 1 and control
Detection shown in unit 105 or Fig. 2 processed and control unit 205 realize, and step S303 is to pass through
Electrical apparatus release assembly 106 shown in Fig. 1 and the mechanical contact shown in mechanical contact 104 or Fig. 2
Realize with electrical apparatus release assembly 210.
In the breaking method used in the backup protection breaker that basis embodiment of the disclosure, described pre-
Determine scope and refer to 5 times of 1 ampere of rated current to described backup protection breaker 100.
In the breaking method used in the backup protection breaker that basis embodiment of the disclosure, described pre-
Determine scope refer to milliampere level electric current to the scope of kilo-ampere level electric current, or any less scope in this scope.
According to the breaking method used in the backup protection breaker that embodiment of the disclosure also includes step
Rapid: under the normal operating conditions of described surge protector, it is judged that the electric current flowing through described conductive track is
No over time through and be gradually increased, thereby determine that the deterioration of the varistor of described surge protector
State.
According to the breaking method used in the backup protection breaker that embodiment of the disclosure also includes step
Rapid: to detect the surge current flow through in described conductive track, and calculate the number of times that described surge current occurs.
The annexation of the unit (functional module, chip etc.) in each embodiment of the disclosure and
Constituent relation protection domain the most of this disclosure is construed as limiting, and they can merge into an independent unit
Realize, or multiple unit that discrete cell therein can also be divided into function less realize.
Each block diagram in accompanying drawing shows that the earth leakage protective device according to disclosure embodiment is in the cards
Structure, function and operation.In this, each square frame in block diagram can represent a module, described
Module comprises the executable instruction of one or more logic function for realizing regulation.As replacement
In implementation, the function marked in square frame can also occur to be different from the order marked in accompanying drawing.
Such as, two continuous print square frames can essentially perform substantially in parallel, and they sometimes can also be by the contrary
Order perform, this is depending on involved function.It is also noted that each square frame in block diagram can
To realize with the special hardware based ASIC performing predetermined function or action, or can be with specially
Realize with the combination of hardware with computer instruction.
Being described above the presently disclosed embodiments, described above is exemplary, and non-exclusive
, and it is also not necessarily limited to each disclosed embodiment.At the model without departing from each illustrated embodiment
Enclose with spirit in the case of, many modifications and changes are all for those skilled in the art
It is apparent from.The selection of term used herein, it is intended to explain best each embodiment principle,
Actual application or the improvement to the technology in market, or make other those of ordinary skill of the art
It is understood that each embodiment disclosed herein.
Industrial usability
Backup protection breaker according to the disclosure goes for protecting surge protector.
Claims (10)
1. for a backup protection breaker for surge protector, including:
Mechanical contact, for being switched on or switched off the electrical connection of described surge protector and backbone circuits；
Current transformer, wherein through there being the energising being connected to described surge protector from described backbone circuits
Circuit, described current transformer is in order to sense the size of current in described conductive track；
Detection and control unit, it is judged that whether described size of current is in preset range, if described electric current
Size is in described preset range, then generate current pulse signal；And
Electrical apparatus release assembly, activated in response to described current pulse signal, to drive described mechanical contact
Disconnect described electrical connection.
2. backup protection breaker as claimed in claim 1, wherein said preset range refers to 1 ampere
To the rated current of described backup protection breaker 5 times.
3. backup protection breaker as claimed in claim 1, wherein said preset range refers to milliampere level
Electric current is to the scope of kilo-ampere level electric current, or any less scope in this scope.
4. backup protection breaker as claimed in claim 1, also includes:
Power supply power supply unit, electrically connects with described conductive track, with to described detection and control unit and
Described electrical apparatus release assembly provides power supply.
5. backup protection breaker as claimed in claim 1, wherein said detection and control unit are also sentenced
Disconnected, under the normal operating conditions of described surge protector, flow through the electric current of described conductive track whether with
The process of time and be gradually increased, thereby determine that the deterioration state of the varistor of described surge protector.
6. backup protection breaker as claimed in claim 1, wherein said detection and control unit are also examined
Survey the generation of surge current, and calculate the number of times that described surge current occurs.
7. backup protection breaker as claimed in claim 1, wherein said current transformer is arranged in institute
State mechanical contact and the lower section of electrical apparatus release assembly, constitute L-type splicing with described detection and control unit.
8. backup protection breaker as claimed in claim 1, wherein said current transformer is arranged in institute
State the lower section of detection and control unit, constitute left right model splicing with described mechanical contact and electrical apparatus release assembly.
9. the method used in the backup protection breaker of surge protector, including:
Current Mutual Inductance step, sensing is connected to described surge protection through current transformer from backbone circuits
Size of current in the conductive track of device；
Current impulse generation step, it is judged that whether described size of current is in preset range, if described electricity
Stream size is in described preset range, then generate current pulse signal；
Dropout step, in response to described current pulse signal, drives mechanical contact to disconnect described surge protection
Device and the electrical connection of described backbone circuits.
10. method as claimed in claim 9, wherein said preset range refers to 1 ampere to after the most described
5 times of the rated current of standby protective breaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510373048.1A CN106329504A (en) | 2015-06-30 | 2015-06-30 | Backup protection circuit breaker of surge protector and application method of backup protection circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510373048.1A CN106329504A (en) | 2015-06-30 | 2015-06-30 | Backup protection circuit breaker of surge protector and application method of backup protection circuit breaker |
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| Publication Number | Publication Date |
|---|---|
| CN106329504A true CN106329504A (en) | 2017-01-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510373048.1A Pending CN106329504A (en) | 2015-06-30 | 2015-06-30 | Backup protection circuit breaker of surge protector and application method of backup protection circuit breaker |
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| CN (1) | CN106329504A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109728573A (en) * | 2019-01-08 | 2019-05-07 | 江苏嘉顿威尔电气有限公司 | A kind of electronics adjusting formula surge back protection system |
| CN109738726A (en) * | 2019-01-08 | 2019-05-10 | 江苏嘉顿威尔电气有限公司 | A kind of on-line monitoring surge protector thermal stability system |
| CN110907713A (en) * | 2018-09-18 | 2020-03-24 | 施耐德电气工业公司 | Surge protector detection |
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| CN204391726U (en) * | 2014-11-10 | 2015-06-10 | 孙麓轩 | A kind of Novel electric surge protector |
| CN204391728U (en) * | 2014-11-10 | 2015-06-10 | 孙麓轩 | A kind of Novel electric surge protector |
| CN104734131A (en) * | 2015-04-03 | 2015-06-24 | 四川蓝讯宝迩电子科技有限公司 | Lightning arrester monitoring system with audible alarm function |
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| CN103545785A (en) * | 2013-10-25 | 2014-01-29 | 上海臻和防雷电气技术有限责任公司 | Power supply MOV surge protection device failure fault current cyclic wave monitoring device and method |
| CN204391726U (en) * | 2014-11-10 | 2015-06-10 | 孙麓轩 | A kind of Novel electric surge protector |
| CN204391728U (en) * | 2014-11-10 | 2015-06-10 | 孙麓轩 | A kind of Novel electric surge protector |
| CN104734131A (en) * | 2015-04-03 | 2015-06-24 | 四川蓝讯宝迩电子科技有限公司 | Lightning arrester monitoring system with audible alarm function |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110907713A (en) * | 2018-09-18 | 2020-03-24 | 施耐德电气工业公司 | Surge protector detection |
| CN109728573A (en) * | 2019-01-08 | 2019-05-07 | 江苏嘉顿威尔电气有限公司 | A kind of electronics adjusting formula surge back protection system |
| CN109738726A (en) * | 2019-01-08 | 2019-05-10 | 江苏嘉顿威尔电气有限公司 | A kind of on-line monitoring surge protector thermal stability system |
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