CN102761116B - Triple suppression circuit of power grid abnormity - Google Patents
Triple suppression circuit of power grid abnormity Download PDFInfo
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- CN102761116B CN102761116B CN201110444963.7A CN201110444963A CN102761116B CN 102761116 B CN102761116 B CN 102761116B CN 201110444963 A CN201110444963 A CN 201110444963A CN 102761116 B CN102761116 B CN 102761116B
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Abstract
The invention relates to a protection circuit and discloses a triple suppression circuit of power grid abnormity. The triple suppression circuit comprises a power grid shock suppression module, a surge current suppression module and a power grid voltage suppression module which are sequentially connected between an output end of a power grid and an AC (Alternating Current) input end of a power supply in series. The triple suppression circuit of the power grid abnormity has the advantages of effectively preventing lightning stroke and preventing impacts to equipment of wide current fluctuation of the voltage and the current of the power grid so as to protect the equipment.
Description
Technical field
The present invention relates to protective circuit, especially relate to a kind of triple suppression circuit of electrical network exception.
Background technology
At the equipment be electrically connected with city, because some equipment is connected on electrical network always, and electrical network is easily introduced thunderbolt at thunder and lightning weather and caused equipment by instantaneous pressure punch through damage, the load variations simultaneously in civil power also can cause the impact of first mate's fluctuation to equipment of line voltage, electric current.When being connected near powerful device, as harbour, large-scale light of stage, heavy construction building site etc., when the frequent switch of these powerful devices, being very big on the impact of electrical network, very easily causing peripheral equipment damaged.As the road lamp power supply etc. of LED, be easy to disturbed and damage.
Summary of the invention
For overcoming the equipment of tradition long-term access electrical network because of thunderbolt, or due to around load variations also can cause first mate's fluctuation of line voltage, electric current to the impact of equipment impaired shortcoming, the triple suppression circuit of the electrical network exception providing a kind of AC of sealing in input that the voltage of the equipment that is input to can be made smoothly, not to be hit.
The object of the invention is to be realized by following technical measures, a triple suppression circuit for electrical network exception, comprises the electrical network thunder suppression module, Inrush current restraining module and the line voltage suppression module that are serially connected in successively between electrical network output and power supply AC input;
Electrical network thunder suppression module, is connected to the live wire of electrical network output, the neutral line and ground wire, for absorbing the crest voltage that electrical network transmits, suppresses thunderbolt;
Inrush current restraining module, connects the live wire of electrical network output, effectively suppresses for the impulse current transmitted electrical network;
Line voltage suppression module, is connected between electrical network output and power supply AC input, for when the overtension that electrical network exports, disconnects electric network protection equipment.
Concrete, described electrical network thunder suppression module comprises the TMOV1 (overtemperature prote type piezo-resistance), TMOV2 and TMOV3 that connect electrical network output.
More specifically, the Indication of Losing Efficacy circuit be made up of resistance R1, Indication of Losing Efficacy LED D2 and diode D1 is serially connected with between the piezo-resistance of described TMOV1 and temperature sensor and between the piezo-resistance of TMOV2 and temperature sensor.
Concrete, described Inrush current restraining module is the low frequency differential mode inductance L 1 of a connection electrical network output live wire.
Concrete, described line voltage suppression module comprises the electric capacity C1 being connected to and carrying out step-down between live wire and the neutral line, diode D3, the diode D5 of rectifying and wave-filtering and electric capacity C2, resistance R3, resistance R4, electric capacity C3, the resistance R5 of the level and smooth sampling of shunting, and switching tube Q1, relay switch K1, relay switch K1 negative peak value absorption diode D4; When the overtension that electrical network exports, relay switch K1 adhesive, thus disconnect the live wire inputing to power supply AC input.
Electrical network thunder suppression module of the present invention can prevent the thunderbolt of 15-20KV; The characteristic that Inrush current restraining module utilizes the electric current of low frequency inductance to suddenly change, effectively suppresses the impulse current that electrical network transmits; When line voltage is too high, line voltage suppression module can disconnect electrical network in time, and proterctive equipment is not burnt.After the present invention being sealed in the AC input of device power supply (DPS), effectively can prevent thunderbolt, and the electric current of the equipment that is input to can be made level and smooth, equipment can also be avoided to be burnt by high pressure.
Accompanying drawing explanation
Fig. 1 is structured flowchart of the present invention;
Fig. 2 is circuit theory diagrams of the present invention.
Embodiment
Contrast accompanying drawing below in conjunction with embodiment the present invention is described in further detail.
As shown in Figure 1, Figure 2, be arranged at the abnormal triple suppression circuit of electrical network of LED street lamp power supply front end, comprise the electrical network thunder suppression module 2, Inrush current restraining module 3 and the line voltage suppression module 4 that are serially connected in successively between electrical network output 1 and LED street lamp power supply AC input 5;
Electrical network thunder suppression module 2, comprises the TMOV1 (overtemperature prote type piezo-resistance), TMOV2 and TMOV3 that connect electrical network output 1, for absorbing the crest voltage that electrical network transmits, suppresses thunderbolt; The Indication of Losing Efficacy circuit be made up of resistance R1, Indication of Losing Efficacy LED D2 and diode D1 is serially connected with, for the inefficacy as identification TMOV1 between the piezo-resistance of TMOV1 and temperature sensor and between the piezo-resistance of TMOV2 and temperature sensor;
Inrush current restraining module 3, is the low frequency differential mode inductance L 1 of connection electrical network output 1 live wire, effectively suppresses for the impulse current transmitted electrical network;
Line voltage suppression module 4, comprise the electric capacity C1 being connected to and carrying out step-down between live wire and the neutral line, diode D3, the diode D5 of rectifying and wave-filtering and electric capacity C2, resistance R3, resistance R4, electric capacity C3, the resistance R5 of the level and smooth sampling of shunting, and switching tube Q1, relay switch K1, relay switch K1 negative peak value absorption diode D4; When the overtension that electrical network exports, relay switch K1 adhesive, thus disconnect the live wire inputing to power supply AC input 5.
More than that the triple suppression circuit of electrical network exception of the present invention is set forth; the present invention is understood for helping; but embodiments of the present invention are not restricted to the described embodiments; any do not deviate from the principle of the invention under do change, modification, substitute, combination, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (1)
1. a triple suppression circuit for electrical network exception, is characterized in that: comprise the electrical network thunder suppression module, Inrush current restraining module and the line voltage suppression module that are serially connected in successively between electrical network output and power supply AC input, electrical network thunder suppression module, is connected to the live wire of electrical network output, the neutral line and ground wire, for absorbing the crest voltage that electrical network transmits, suppresses thunderbolt, Inrush current restraining module, connects the live wire of electrical network output, effectively suppresses for the impulse current transmitted electrical network, line voltage suppression module, be connected between electrical network output and power supply AC input, for when the overtension that electrical network exports, disconnect electric network protection equipment, wherein, described electrical network thunder suppression module comprises and connects electrical network output TMOV1, TMOV2 and TMOV3, be serially connected with between the piezo-resistance of described TMOV1 and temperature sensor and between the piezo-resistance of TMOV2 and temperature sensor by resistance R1, the Indication of Losing Efficacy circuit that Indication of Losing Efficacy LED D2 and diode D1 forms, described Inrush current restraining module is the low frequency differential mode inductance L 1 of a connection electrical network output live wire, described line voltage suppression module comprises the electric capacity C1 being connected to and carrying out step-down between live wire and the neutral line, the diode D3 of rectifying and wave-filtering, diode D5 and electric capacity C2, the resistance R3 of the level and smooth sampling of shunting, resistance R4, electric capacity C3, resistance R5, and switching tube Q1, relay switch K1, the negative peak value absorption diode D4 of relay switch K1, when the overtension that electrical network exports, relay switch K1 adhesive, thus disconnect the live wire inputing to power supply AC input.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110444963.7A CN102761116B (en) | 2011-12-26 | 2011-12-26 | Triple suppression circuit of power grid abnormity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110444963.7A CN102761116B (en) | 2011-12-26 | 2011-12-26 | Triple suppression circuit of power grid abnormity |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102761116A CN102761116A (en) | 2012-10-31 |
| CN102761116B true CN102761116B (en) | 2015-07-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110444963.7A Active CN102761116B (en) | 2011-12-26 | 2011-12-26 | Triple suppression circuit of power grid abnormity |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108111012A (en) * | 2017-12-14 | 2018-06-01 | 北京卫星制造厂 | A kind of high-power power supply and high-voltage motor drive module match circuit |
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| CN201051668Y (en) * | 2007-03-30 | 2008-04-23 | 毛灿豪 | A lightning prevention circuit |
| CN101359820A (en) * | 2007-11-27 | 2009-02-04 | 朱玉光 | Practical electric leakage protector detecting dangerous leakage voltage value |
| CN201234130Y (en) * | 2008-06-24 | 2009-05-06 | 中兴通讯股份有限公司 | Lightning arrester circuit for communication equipment |
| CN201274409Y (en) * | 2008-10-07 | 2009-07-15 | 上海协同科技股份有限公司 | RS485 communication port with enhanced protection |
| CN201636674U (en) * | 2009-06-10 | 2010-11-17 | 黄爱国 | Lightning protection led street lamp |
| CN201656470U (en) * | 2010-04-15 | 2010-11-24 | 公牛集团有限公司 | Lightning protection circuit with overcurrent protection function |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101976830A (en) * | 2010-11-18 | 2011-02-16 | 南京信息工程大学 | Surge protection device of high-definition network video camera |
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2011
- 2011-12-26 CN CN201110444963.7A patent/CN102761116B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201051668Y (en) * | 2007-03-30 | 2008-04-23 | 毛灿豪 | A lightning prevention circuit |
| CN101359820A (en) * | 2007-11-27 | 2009-02-04 | 朱玉光 | Practical electric leakage protector detecting dangerous leakage voltage value |
| CN201234130Y (en) * | 2008-06-24 | 2009-05-06 | 中兴通讯股份有限公司 | Lightning arrester circuit for communication equipment |
| CN201274409Y (en) * | 2008-10-07 | 2009-07-15 | 上海协同科技股份有限公司 | RS485 communication port with enhanced protection |
| CN201636674U (en) * | 2009-06-10 | 2010-11-17 | 黄爱国 | Lightning protection led street lamp |
| CN201656470U (en) * | 2010-04-15 | 2010-11-24 | 公牛集团有限公司 | Lightning protection circuit with overcurrent protection function |
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| CN102761116A (en) | 2012-10-31 |
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