CN205123244U - Surge protector - Google Patents
Surge protector Download PDFInfo
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- CN205123244U CN205123244U CN201520826569.3U CN201520826569U CN205123244U CN 205123244 U CN205123244 U CN 205123244U CN 201520826569 U CN201520826569 U CN 201520826569U CN 205123244 U CN205123244 U CN 205123244U
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- lightning protection
- discharge tube
- gas discharge
- protection circuit
- detecting unit
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Abstract
The utility model discloses a surge protector, including the lightning protection circuit, the lightning protection circuit is including first lightning protection circuit, first lightning protection circuit includes a detecting element and the 2nd detecting element, a detecting element is coupled and is used for the real -time detection overvoltage in the live wire, and export first detected signal, the 2nd detecting element is coupled and is used for the real -time detection overvoltage on the zero line, and output second detected signal, a detecting element and the 2nd detecting element all are coupled in a gas discharge tube, a gas discharge tube opens and close with the realization in response to first detected signal or second detected signal, a gas discharge tube during operation provides first clamping voltage, and first clamping voltage connects in implementation of circuit, and implementation of circuit includes master module, provides a reference voltage, compare the module, the output compare signal, the executable module, output executive signal, still met protection switch between first lightning protection circuit and the load, protection switch is controlled by the executive signal disconnection.
Description
Technical field
The utility model relates to a kind of power protector, and more particularly, it relates to a kind of Surge Protector.
Background technology
Surge Protector (surge protector) is also known as lightning protection device; be called for short (SPD) to be applicable to exchange 50/60HZ; in the electric power system (or communication system) of rated voltage 220V to 380V; the surge of indirect thunder and lightning and direct effects of lightning or other instantaneous overvoltages is protected; be applicable to the requirement of home dwelling, the tertiary industry and industrial circle surge protection, there is relative phase, relatively; phase center line, center line over the ground and the protected mode such as combination.
Surge is also surging, as the term suggests be exactly the transient overvoltage exceeding normal working voltage.Essentially, surge occurs in the violent pulse of one in only millions of/mono-second time, the reason of surge may be caused to have: jumbo, short circuit, electrical source exchange or big-block engine.And the product containing surge insulation device can absorb the huge energy of burst effectively, impaired to protect connection device to avoid.
Surge Protector, is also lightning protection device, and being a kind ofly provides the electronic installation of security protection for various electronic equipment, instrument and meter, communication line.When producing suddenly peak current or voltage because of extraneous interference in electric loop or communication line, Surge Protector can be shunted within the extremely short time in conducting, thus avoids surge to the infringement of other equipment in loop.
But there is a problem in Surge Protector; although be provided with lightning protection circuit; but when the lightning protection effect of anti-thunder tube (discharge tube) can not be released completely; still larger impact can be produced on load; and now; if peak current continues for some time, so this also cannot can be transmitted directly to subsequent conditioning circuit by the big current of releasing, and directly affects the normal use of power consumption equipment.
Utility model content
For the deficiency that prior art exists, the purpose of this utility model is to provide a kind of when discharging current cannot be released completely, automatically detects the Surge Protector of protection load.
For achieving the above object, the utility model provides following technical scheme: a kind of Surge Protector, comprise lightning protection circuit, described lightning protection circuit includes the first lightning protection circuit, described first lightning protection circuit comprises the first detecting unit and the second detecting unit, described first detecting unit is coupled to live wire for being detected voltage in real time, and export the first detection signal, described second detecting unit is coupled on zero line for being detected voltage in real time, and export the second detection signal, described first detecting unit and the second detecting unit are all coupled to the first gas discharge tube, described first gas discharge tube in response to the first detection signal or the second detection signal to realize opening and closing, there is provided the first clamping voltage during described first gas discharge tube work, described first clamping voltage is connected to executive circuit, and described executive circuit comprises base modules, provides a reference voltage, comparison module, receives reference voltage and the first clamping voltage respectively, when the first clamping voltage is higher than reference voltage, exports comparison signal, Executive Module, is coupled to comparison module, when receiving comparison signal, exports executive signal, also be connected to protection switch between first lightning protection circuit and load, described protection switch is controlled by executive signal and disconnects, and also comprise the second lightning protection circuit, described second lightning protection circuit is coupled between the first lightning protection circuit and load.
By such setting, Surge Protector generally just comprises even similar structures described in first lightning protection circuit, but disclose the first detecting unit and the second detecting unit in the utility model, realized keying during overcurrent by the action of the first detecting unit and the second detecting unit one, compare like this and original directly gas discharge tube is set, the effect preventing from disturbing can be played, ensure that gas discharge tube can not on-line operation under normal circumstances, only have when overcurrent appears in live wire or any one end of zero line, gas discharge tube just meeting action, and during gas discharge tube work (occurring peak current), peak overvoltage can be carried out clamp, there is a clamping voltage, proof load can not damage because of unexpected large voltage, but, now there is a problem, if peak current is too high, and electric current cannot be offset completely by means of only the electric discharge of discharge tube, so now clamping voltage there will be the phenomenon of " unstability ", so detected clamping voltage by executive circuit, once clamping voltage is higher than preset value, with regard to disconnecting consumers, by this technology, realize the protection to load, now carry out releasing only by discharge tube and the clamp of voltage.
The utility model can be set to further: described first detecting unit and the second detecting unit are piezo-resistance.
The utility model can be set to further: described first gas discharge tube is two pole discharge tubes.
The utility model can be set to further: described second lightning protection circuit comprises the second gas discharge tube, the second coil, the 3rd gas discharge tube and tertiary coil, described second gas discharge tube is series on live wire, described second coils from parallel connection of coils is in the second gas discharge tube, described 3rd gas discharge tube is series on zero line, and described tertiary coil is parallel to the 3rd gas discharge tube.
By adopting technique scheme, ensure that gas discharge tube can not on-line operation under normal circumstances, only have when overcurrent appears in live wire or any one end of zero line, gas discharge tube just meeting action, and during gas discharge tube work (occurring peak current), peak overvoltage can be carried out clamp, there is a clamping voltage, proof load can not damage because of unexpected large voltage, but, now there is a problem, if peak current is too high, and electric current cannot be offset completely by means of only the electric discharge of discharge tube, so now clamping voltage there will be the phenomenon of " unstability ", so detected clamping voltage by executive circuit, once clamping voltage is higher than preset value, with regard to disconnecting consumers, by this technology, realize the protection to load, now carry out releasing only by discharge tube and the clamp of voltage.
Accompanying drawing explanation
Fig. 1 is the discharge circuit schematic diagram of the utility model embodiment;
Fig. 2 is the utility model executive circuit schematic diagram.
Reference numeral: 10, the first lightning protection circuit; 11, the first detecting unit; 12 second detecting units; 20, the second lightning protection circuit; 30, detection control circuit; 40, indicating circuit; 111, base modules; 112, comparison module; 113, Executive Module; 114, anti-interference module.
Embodiment
Referring to figs. 1 through Fig. 2, the utility model embodiment is described further.
With reference to shown in Fig. 1, lightning protection circuit is provided with the first lightning protection circuit 10, first lightning protection circuit 10 comprises the first gas discharge tube GDT1, first lightning protection circuit 10 comprises the first detecting unit 11 and the first detecting unit 12, first detecting unit 11 is piezo-resistance RV1, and the first detecting unit 12 is piezo-resistance RV2.
The operation principle of piezo-resistance is as follows: when being added in the threshold value of the voltage in piezo-resistance lower than it, the electric current flowing through it is minimum, and it is equivalent to the infinitely-great resistance of resistance.That is, when being added in the voltage above it lower than its threshold value, it is equivalent to the switch of an off-state; When being added in the voltage in piezo-resistance and exceeding its threshold value, the electric current flowing through it increases sharply, and it is equivalent to the infinitesimal resistance of resistance.That is, when being added in the voltage above it higher than its threshold value, it is equivalent to the switch of a closure state.
First detecting unit 11 is coupled to live wire for being detected voltage in real time, and export the first detection signal, first detecting unit 12 is coupled on zero line for being detected voltage in real time, and export the second detection signal, first detecting unit 11 and the first detecting unit 12 are all coupled to the first gas discharge tube GDT1, first gas discharge tube GDT1 in response to the first detection signal or the second detection signal to realize opening and closing, first gas discharge tube GDT1 is two pole discharge tubes, one end of two pole discharge tubes and piezo-resistance RV1, piezo-resistance RV2 connects, other end ground connection, by the first detecting unit 11, first detecting unit 12 pairs live wire, zero line detects in real time, avoid forgetting that the situation causing electrical equipment to damage lightning protection function unlatching occurs.
The operation principle of gas discharge tube is gas discharge, when applied voltage increases above the dielectric strength of gas, the gap of two interpolars is by discharge breakdown, be converted into conduction state by original state of insulation, the voltage after conducting between discharge tube the two poles of the earth maintains the residual voltage level of putting electric arc channel and determining.
By the effect of piezo-resistance RV1 and piezo-resistance RV2, to being struck by lightning, the high voltage produced detects, by piezo-resistance RV1, live wire is detected, and piezo-resistance RV2 detects zero line, if the resistance of piezo-resistance RV1 diminishes, then high voltage live wire existing and is struck by lightning and causes is described; If the resistance of piezo-resistance RV2 diminishes, then high voltage zero line existing and is struck by lightning and causes is described; If the resistance of the resistance of piezo-resistance RV1 and piezo-resistance RV2 all diminishes, then high voltage zero line, live wire all existing and is struck by lightning and causes is described; No matter in which kind of situation above-mentioned, all the electric current of the surge brought of being struck by lightning is flowed into the first gas discharge tube GDT1 and carry out earial drainage.
Lightning protection circuit also comprises the second lightning protection circuit 20, second lightning protection circuit 20 is coupled between the first lightning protection circuit 10 and load, second lightning protection circuit 20 comprises the second gas discharge tube GDT2, the second coil L2, the 3rd gas discharge tube GDT3 and tertiary coil L3, second gas discharge tube GDT2 is series on live wire, second coil L2 is parallel to the second gas discharge tube GDT2,3rd gas discharge tube GDT3 is series on zero line, and tertiary coil L3 is parallel to the 3rd gas discharge tube GDT3.
Because the electric current of the surge brought of being struck by lightning is very large, and can there is the risk increased sharply electric current cannot let out completely in the first lightning protection circuit 10, so arranging a second lightning protection electric current, do not produced infringement by having let out to electrical equipment to prevent the electric current increased sharply.
Detection control circuit 30 is provided with between first lightning protection circuit 10 and load, detection control circuit 30 is piezo-resistance RV3, one end of detection control circuit 30 is coupled to live wire, the other end is coupled to zero line, detecting unit is used for being detected voltage in real time, and in response to overvoltage with by lightning protection circuit short circuit, when the first lightning protection circuit 10 damages due to fault, then earial drainage is not carried out to the electric current increased sharply, thus detect by piezo-resistance RV3 the high voltage that thunderbolt produces, the resistance of piezo-resistance RV3 is diminished, electric current directly flows into zero line from live wire through piezo-resistance RV3, thus by whole lightning protection circuit short circuit, avoid causing damage to the load of access wiring board, and when the first lightning protection circuit 10 can normally work, then detection control circuit 30 does not work.
Indicating circuit 40 is provided with between first lightning protection circuit 10 and detection control circuit 30; indicating circuit 40 comprises protective resistance and indicator light; be coupled between live wire and zero line after protective resistance R9 and indicator light LED strip join; when the first lightning protection circuit 10 normally works; then indicator light LED can normally light; if when the first lightning protection circuit 10 damages, then detection control circuit 30 works and by this lightning protection circuit short circuit, and indicator light LED extinguishes simultaneously.
First lightning protection circuit 10, indicating circuit 40, detection control circuit 30 and the second lightning protection circuit 20 are coupled between live wire and zero line successively.
With reference to shown in Fig. 2, executive circuit includes base modules 111, for providing a reference voltage; Comparison module 113, comparison module is set to comparator and is set to LM355, is coupled to the first clamping voltage V and base modules 111, when sampled voltage is less than reference voltage, exports comparison signal; Described base modules 111 comprises the first resistance R11, the second resistance R12 and the 3rd resistance R13 that are arranged in series successively, and the node that described first resistance R11 and the second resistance R12 couples provides reference voltage.Described 3rd resistance R13 is adjustable resistance.Described Executive Module 113 comprises comparator, and the negative input end of described comparator receives sampled voltage, and the positive input terminal of described comparator receives reference voltage, when sampled voltage is less than reference voltage, exports comparison signal.Executive Module 113 be connected to comparison module 112, its output is coupled with the 5th resistance R15 and the 6th resistance R16 that are arranged in series, the node that 5th resistance R15 and the 6th resistance R16 couples is connected to the base stage of NPN pipe, NPN pipe collector is connected to relay coil KM1, like this when the ion earthing unit humidity of correspondence is too low, not needing just can unusual circumstance by field observation.Described second resistance R12 has been arranged in parallel anti-interference module 114, and described anti-interference module 114 comprises the 4th resistance R14 and the switch element be arranged in series, and the controlled terminal of described switch element is coupled to comparison signal.Switch element is set to metal-oxide-semiconductor.
The above is only preferred implementation of the present utility model, protection range of the present utility model be not only confined to above-described embodiment, and all technical schemes belonged under the utility model thinking all belong to protection range of the present utility model.It should be pointed out that for those skilled in the art, do not departing from the some improvements and modifications under the utility model principle prerequisite, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (4)
1. a Surge Protector, comprise lightning protection circuit, it is characterized in that: described lightning protection circuit includes the first lightning protection circuit, described first lightning protection circuit comprises the first detecting unit and the second detecting unit, described first detecting unit is coupled to live wire for being detected voltage in real time, and export the first detection signal, described second detecting unit is coupled on zero line for being detected voltage in real time, and export the second detection signal, described first detecting unit and the second detecting unit are all coupled to the first gas discharge tube, described first gas discharge tube in response to the first detection signal or the second detection signal to realize opening and closing, there is provided the first clamping voltage during described first gas discharge tube work, described first clamping voltage is connected to executive circuit, and described executive circuit comprises base modules, provides a reference voltage,
Comparison module, receives reference voltage and the first clamping voltage respectively, when the first clamping voltage is higher than reference voltage, exports comparison signal;
Executive Module, is coupled to comparison module, when receiving comparison signal, exports executive signal;
Also be connected to protection switch between first lightning protection circuit and load, described protection switch is controlled by executive signal and disconnects;
Also comprise the second lightning protection circuit, described second lightning protection circuit is coupled between the first lightning protection circuit and load.
2. a kind of Surge Protector according to claim 1, is characterized in that: described first detecting unit and the second detecting unit are piezo-resistance.
3. a kind of Surge Protector according to claim 2, is characterized in that: described first gas discharge tube is two pole discharge tubes.
4. a kind of Surge Protector according to claim 1; it is characterized in that: described second lightning protection circuit comprises the second gas discharge tube, the second coil, the 3rd gas discharge tube and tertiary coil; described second gas discharge tube is series on live wire; described second coils from parallel connection of coils is in the second gas discharge tube; described 3rd gas discharge tube is series on zero line, and described tertiary coil is parallel to the 3rd gas discharge tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520826569.3U CN205123244U (en) | 2015-10-22 | 2015-10-22 | Surge protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520826569.3U CN205123244U (en) | 2015-10-22 | 2015-10-22 | Surge protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205123244U true CN205123244U (en) | 2016-03-30 |
Family
ID=55578820
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520826569.3U Expired - Fee Related CN205123244U (en) | 2015-10-22 | 2015-10-22 | Surge protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205123244U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113113902A (en) * | 2021-04-07 | 2021-07-13 | 深圳市优威电气技术有限公司 | LED power supply protection device and method based on separation control |
-
2015
- 2015-10-22 CN CN201520826569.3U patent/CN205123244U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113113902A (en) * | 2021-04-07 | 2021-07-13 | 深圳市优威电气技术有限公司 | LED power supply protection device and method based on separation control |
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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 |
Granted publication date: 20160330 Termination date: 20181022 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |