CN105633937A - Single-phase power supply series-wound type overvoltage protector - Google Patents
Single-phase power supply series-wound type overvoltage protector Download PDFInfo
- Publication number
- CN105633937A CN105633937A CN201610113095.7A CN201610113095A CN105633937A CN 105633937 A CN105633937 A CN 105633937A CN 201610113095 A CN201610113095 A CN 201610113095A CN 105633937 A CN105633937 A CN 105633937A
- Authority
- CN
- China
- Prior art keywords
- limiting circuit
- voltage
- pressure limiting
- protector
- overvoltage protector
- 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.)
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/041—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage using a short-circuiting device
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/005—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection avoiding undesired transient conditions
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
- H02H9/026—Current limitation using PTC resistors, i.e. resistors with a large positive temperature coefficient
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention relates to a single-phase power supply series-wound type overvoltage protector. The overvoltage protector comprises a first voltage-limiting circuit and a second voltage-limiting circuit that are connected. The overvoltage protector has the two-level voltage-limiting circuits, so that surge voltage on a power transmission line can be reduced a lot; a positive temperature coefficient thermistor is added in the voltage-limiting circuits, so that electric current shock can be reduced in equipment starting up; and in addition, the protector has a low cost, a simple structure and wide adaptability.
Description
Technical field
The present invention relates to a kind of serially connected superpotential protector of power supply, it is specially the serially connected superpotential protector in a kind of single-phase electricity source.
Background technology
Along with a large amount of popularization and applications of electronic product; the decline of various ultra-large unicircuit proof voltage; electronic product is caused and endangers greatly by the various overvoltage surges occurred on power supply lines, is the safe operation of proterctive equipment, it is necessary to power input is carried out meticulous protection.
In order to the overvoltage surge protection problem solved on power supply lines, Chinese patent discloses the patent application (patent No. is 2008201085774) of " a kind of lightning-protection system ". This patent have employed common mode, difference mould and meticulous protection; when overvoltage surge occurs in transmitting line, altogether poor mould protection voltage dependent resistor is that to crossing, power supply carries out pressure limiting to low-resistance by high resistive rapidly; TVS also enters clamping state simultaneously; when surge voltage exceedes certain value; ground voltage dependent resistor and portable protective gaps are that to crossing, zero-power line carries out pressure limiting to low-resistance by high resistive by zero line simultaneously; equipment is provided and effectively protects, but, at least have the following disadvantages:
It is one years old, the input terminus of this lightning-protection system directly and has connected a discharging gap, and the action voltage in gap is set between 311V �� 380V, when meeting with superpotential or Lightning Over-voltage, gap very easily produces electric discharge, the afterflow of discharging gap just cannot be cut off when a discharge occurs, thus produces to burn out insurance or air switch tripping operation.
They are two years old, the output terminal of this lightning-protection system directly and has connected a TVS pipe, due to TVS pipe be applied in AC power time, its peak point current is very low, maximum peak point current also can not more than 1A, therefore when there is superpotential in electrical network TVS very easily occur puncture short cause burn out insurance or air switch tripping operation.
Summary of the invention
Technical problem solved by the invention is to provide a kind of serially connected superpotential protector of power supply, to solve above-mentioned background technical disadvantages.
Technical problem solved by the invention realizes by the following technical solutions:
A kind of single-phase serially connected superpotential protector, it mainly comprises: the first pressure limiting circuit. and the 2nd pressure limiting circuit, described first pressure limiting circuit is connected with the 2nd pressure limiting circuit.
In the present invention, it is characterised in that described R1, R2 is positive temperature system thermistor, and R3, R4 are Zinc-oxide piezoresistor.
Useful effect is; the present invention has two grades of pressure limiting circuit, can the surge voltage on transmitting line be dropped to very low, owing to adding posistor in pressure limiting circuit; can also reducing electric current during device power-up to impact, this protector also has that cost is low, structure is simple, wide adaptability.
Accompanying drawing explanation
Fig. 1 is the schematic circuit diagram of 2008201085774 patent No.s.
Fig. 2 is the schematic block circuit diagram of the present invention.
Fig. 3 is the schematic circuit diagram of the present invention.
Embodiment
For the present invention is realized technique means, creation characteristic, be easy to understand with function with reaching order, below in conjunction with concrete diagram, set forth the present invention further.
See Fig. 2, the schematic block circuit diagram of a kind of single-phase serially connected superpotential protector, comprising: the first pressure limiting circuit. and the 2nd pressure limiting circuit, the first pressure limiting circuit is connected with the 2nd pressure limiting circuit.
See Fig. 3; the schematic circuit diagram of a kind of single-phase serially connected superpotential protector; first pressure limiting circuit is made up of R1 and R4 series winding; one end of R1 is connected with L, and the other end is connected with the upper end of R4, and the lower end of R4 is connected with N; 2nd pressure limiting circuit is made up of R2 and R3 series winding; one end of R2 is connected with the series winding mid point of R1 with R4, and the other end is connected with the upper end of R3, and the lower end of R3 is connected with N.
When power input has overvoltage surge or thunder and lightning superpotential enters, the voltage dependent resistor R4 of the first pressure limiting circuit is low-resistance by high resistive rapidly; R1 then turns into high resistance from low-resistance; when the voltage of the first pressure limiting circuit is higher than the trigger voltage of the 2nd pressure limiting circuit; the voltage dependent resistor R3 of the 2nd pressure limiting circuit is low-resistance by high resistive rapidly, and R2 then is turned into high having hindered whole voltage-limiting protection process from low-resistance.
More than show and describe the ultimate principle of the present invention and the advantage of main feature and the present invention; the technician of the industry should understand; the present invention is not restricted to the described embodiments; the principle that the present invention is just described described in above-described embodiment and specification sheets; do not departing under spirit and scope of the invention; the present invention also has various changes and modifications; these changes and improvements all fall within the scope of claimed invention, and the claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (3)
1. the serially connected superpotential protector in single-phase electricity source, it mainly comprises: the first pressure limiting circuit. and the 2nd pressure limiting circuit, described first pressure limiting circuit is connected with the 2nd pressure limiting circuit.
2. a kind of single-phase serially connected superpotential protector as claimed in claim 1; it is characterized in that: the first described pressure limiting circuit is made up of R1 and R4 series winding; one end of R1 is connected with L; the other end is connected with the upper end of R4; the lower end of R4 is connected with N, and the 2nd pressure limiting circuit is made up of R2 and R3 series winding, and one end of R2 is connected with the series winding mid point of R1 with R4; the other end is connected with the upper end of R3, and the lower end of R3 is connected with N.
3. R1, R2 as claimed in claim 1 or 2 are posistor, and R3, R4 are Zinc-oxide piezoresistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610113095.7A CN105633937A (en) | 2016-02-29 | 2016-02-29 | Single-phase power supply series-wound type overvoltage protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610113095.7A CN105633937A (en) | 2016-02-29 | 2016-02-29 | Single-phase power supply series-wound type overvoltage protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105633937A true CN105633937A (en) | 2016-06-01 |
Family
ID=56048605
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610113095.7A Pending CN105633937A (en) | 2016-02-29 | 2016-02-29 | Single-phase power supply series-wound type overvoltage protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105633937A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110445082A (en) * | 2019-08-20 | 2019-11-12 | 长沙理工大学 | The single-phase mounting structure and its test method of the parallel connection gaps of 10kV distribution line |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202997542U (en) * | 2012-08-08 | 2013-06-12 | 雷施盾(北京)科技有限公司 | Lightning protection device adapter box of filtering type telephone |
| CN103457251A (en) * | 2013-08-30 | 2013-12-18 | 武汉联创恒业科技有限公司 | Protective circuit based on PTC thermistor |
| CN203774778U (en) * | 2014-01-08 | 2014-08-13 | 成都新欣神风电子科技有限公司 | Transient interference-suppressing protection circuit |
| US20150085417A1 (en) * | 2008-10-14 | 2015-03-26 | Black Hawk Energy Products Llc | Electrical energy saving system |
-
2016
- 2016-02-29 CN CN201610113095.7A patent/CN105633937A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150085417A1 (en) * | 2008-10-14 | 2015-03-26 | Black Hawk Energy Products Llc | Electrical energy saving system |
| CN202997542U (en) * | 2012-08-08 | 2013-06-12 | 雷施盾(北京)科技有限公司 | Lightning protection device adapter box of filtering type telephone |
| CN103457251A (en) * | 2013-08-30 | 2013-12-18 | 武汉联创恒业科技有限公司 | Protective circuit based on PTC thermistor |
| CN203774778U (en) * | 2014-01-08 | 2014-08-13 | 成都新欣神风电子科技有限公司 | Transient interference-suppressing protection circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110445082A (en) * | 2019-08-20 | 2019-11-12 | 长沙理工大学 | The single-phase mounting structure and its test method of the parallel connection gaps of 10kV distribution line |
| CN110445082B (en) * | 2019-08-20 | 2020-12-01 | 长沙理工大学 | Single-phase installation structure of parallel gap of 10kV distribution line and test method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160601 |
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| WD01 | Invention patent application deemed withdrawn after publication |