CN204407881U - A kind of safe extinguishing arc pressure limiting device - Google Patents
A kind of safe extinguishing arc pressure limiting device Download PDFInfo
- Publication number
- CN204407881U CN204407881U CN201520144806.8U CN201520144806U CN204407881U CN 204407881 U CN204407881 U CN 204407881U CN 201520144806 U CN201520144806 U CN 201520144806U CN 204407881 U CN204407881 U CN 204407881U
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- gndcb
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- limiting device
- overvoltage protector
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Abstract
The utility model discloses a kind of safe extinguishing arc pressure limiting device, include respectively from protection end line A1, B1, C1 that the triple line A of protected system, B, C draw, protection end line A1, B1, C1 are connected to overvoltage protector GNDCB, the lower end ground connection of overvoltage protector GNDCB, is parallel with over-voltage detection circuit at the node at overvoltage protector GNDCB switch S 1 two ends; Protection end line A1, B1, C1 of being positioned at overvoltage protector GNDCB front are connected to high-tension fuse RD2, voltage transformer pt and controller KWX successively, protection end line A1, B1, C1 of being positioned at high-tension fuse D2 front are connected to successively ground connection after current limiting fuse RD1 and vacuum contactor JZa, JZb, JZc.Both can eliminate arc grounding over-voltage in the utility model, the overvoltage of other form in electric power system can be suppressed again, and overvoltage protection ability is strong.
Description
Technical field
The utility model relates to power circuit security technology area, is specially a kind of safe extinguishing arc pressure limiting device.
Background technology
In electric power system, in order to system safety operation and power supply reliable, the power distribution network of most 6 ~ 66kV adopts isolated neutral mode, when there is single-phase earthing, flow through the capacity current being normally no more than 10A of earth point, this electric arc is not enough to smooth combustion, but the intermittent electric arc formed off and on, this, by causing the vibration of system inductance capacitor loop, causes arcing ground, and system is overvoltage condition.Original extinguishing arc on market, harmonic elimination apparatus eliminate the fruitful proterctive equipment of arc grounding over-voltage, but in electric power system superpotential form not only only this is a kind of, also have atmospheric over-voltage, switching overvoltage, resonance overvoltage etc.Address these problems, more advanced, reliable new departure must be found
Utility model content
The purpose of this utility model is to provide a kind of safe extinguishing arc pressure limiting device, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
A kind of safe extinguishing arc pressure limiting device, include respectively from protection end line A1, B1, C1 that the triple line A of protected system, B, C draw, protection end line A1, B1, C1 are connected to overvoltage protector GNDCB, the lower end ground connection of overvoltage protector GNDCB, over-voltage detection circuit is parallel with at the node at overvoltage protector GNDCB switch S 1 two ends, over-voltage detection circuit comprises the resitstance voltage divider and bidirectional triode thyristor Q1 that are composed in series by resistance R1 and resistance R2, resistance R1 is positioned at cold end, and the component voltage on resistance R1 exports the control pole of bidirectional triode thyristor Q1 to; Protection end line A1, B1, C1 of being positioned at overvoltage protector GNDCB front are connected to high-tension fuse RD2, voltage transformer pt and controller KWX successively, protection end line A1, B1, C1 of being positioned at high-tension fuse D2 front are connected to successively ground connection after current limiting fuse RD1 and vacuum contactor JZa, JZb, JZc.
As the utility model further technical scheme, described resistance R1 is adjustable resistance.
As the utility model further technical scheme, described resistance R1 two end node shunt capacitance C2.
As the utility model further technical scheme, the control end of described vacuum contactor JZa, JZb, JZc is by wire access controller KWX.
Compared with prior art, overvoltage protection device GNDCB in the utility model is as over-voltage suppression Primary Component, be the product that arc-extinction device and over-voltage suppression device are fused into one, both can eliminate arc grounding over-voltage, the overvoltage of other form in electric power system can be suppressed again; Overvoltage protection part is constituted by bidirectional triode thyristor Q1, adjustable resistance R1, resistance R2, electric capacity C1.When voltage is normal by the undertension fallen after adjustable resistance R1 and resistance R2 dividing potential drop (this voltage can be adjusted by R1) on adjustable resistance R1 to trigger Q1 conducting; thus produce loop to leakage current not affect (being in off state), protector normally runs.When (such as: misphase, neutral line break and thunder and lightning etc.) causes the voltage fallen on adjustable resistance R1 during line over-voltage to be greater than electronic switch threshold value for a certain reason; be enough to trigger bidirectional triode thyristor Q1 conducting; simulate leakage current generation loop after bidirectional triode thyristor Q1 conducting and be in channel status; be equivalent to press switch S 1; then protector tripping operation is cut off the electricity supply, and serves overvoltage protection effect.
Accompanying drawing explanation
Fig. 1 is the electrical block diagram of a kind of safe extinguishing arc pressure limiting device of the utility model.
Embodiment
Be described in more detail below in conjunction with the technical scheme of embodiment to this patent.
Refer to Fig. 1, a kind of safe extinguishing arc pressure limiting device, include respectively from the triple line A of protected system, B, the protection end line A1 of the upper extraction of C, B1, C1, protection end line A1, B1, C1 is connected to overvoltage protector GNDCB, the lower end ground connection of overvoltage protector GNDCB, over-voltage detection circuit is parallel with at the node at overvoltage protector GNDCB switch S 1 two ends, over-voltage detection circuit comprises the resitstance voltage divider and bidirectional triode thyristor Q1 that are composed in series by resistance R1 and resistance R2, resistance R1 is positioned at cold end, component voltage on resistance R1 exports the control pole of bidirectional triode thyristor Q1 to, in the present embodiment, resistance R1 is adjustable resistance, resistance R1 two end node shunt capacitance C2, protection end line A1, B1, C1 of being positioned at overvoltage protector GNDCB front are connected to high-tension fuse RD2, voltage transformer pt and controller KWX successively, protection end line A1, B1, C1 of being positioned at high-tension fuse D2 front are connected to successively ground connection after current limiting fuse RD1 and vacuum contactor JZa, JZb, JZc, the control end of vacuum contactor JZa, JZb, JZc is by wire access controller KWX.
Vacuum contactor JZa, JZb, JZc with the output signal of controller KWX for switch controlling signal source.Vacuum contactor JZa, JZb, JZc are the actuator of arc-extinction device; Vacuum contactor JZa, JZb, JZc could effectively must work for switch controlling signal source with the output signal of controller KWX, complete parameter preset protection and service requirement.Overvoltage protection device GNDCB, as over-voltage suppression Primary Component, is product arc-extinction device and over-voltage suppression device fused into one, both can eliminates arc grounding over-voltage, can suppress again the overvoltage of other form in electric power system;
Overvoltage protection part is constituted by bidirectional triode thyristor Q1, adjustable resistance R1, resistance R2, electric capacity C1.When voltage is normal by the undertension fallen after adjustable resistance R1 and resistance R2 dividing potential drop (this voltage can be adjusted by R1) on adjustable resistance R1 to trigger Q1 conducting; thus produce loop to leakage current not affect (being in off state), protector normally runs.When (such as: misphase, neutral line break and thunder and lightning etc.) causes the voltage fallen on adjustable resistance R1 during line over-voltage to be greater than electronic switch threshold value for a certain reason; be enough to trigger bidirectional triode thyristor Q1 conducting; simulate leakage current generation loop after bidirectional triode thyristor Q1 conducting and be in channel status; be equivalent to press switch S 1; then protector tripping operation is cut off the electricity supply, and serves overvoltage protection effect.
Above the better embodiment of this patent is explained in detail, but this patent is not limited to above-mentioned execution mode, in the ken that one skilled in the relevant art possesses, various change can also be made under the prerequisite not departing from this patent aim.
Claims (4)
1. a safe extinguishing arc pressure limiting device, it is characterized in that, include respectively from the triple line A of protected system, B, the protection end line A1 of the upper extraction of C, B1, C1, protection end line A1, B1, C1 is connected to overvoltage protector GNDCB, the lower end ground connection of overvoltage protector GNDCB, over-voltage detection circuit is parallel with at the node at overvoltage protector GNDCB switch S 1 two ends, over-voltage detection circuit comprises the resitstance voltage divider and bidirectional triode thyristor Q1 that are composed in series by resistance R1 and resistance R2, resistance R1 is positioned at cold end, component voltage on resistance R1 exports the control pole of bidirectional triode thyristor Q1 to, protection end line A1, B1, C1 of being positioned at overvoltage protector GNDCB front are connected to high-tension fuse RD2, voltage transformer pt and controller KWX successively, protection end line A1, B1, C1 of being positioned at high-tension fuse D2 front are connected to successively ground connection after current limiting fuse RD1 and vacuum contactor JZa, JZb, JZc.
2. the safe extinguishing arc pressure limiting device of one according to claim 1, is characterized in that, described resistance R1 is adjustable resistance.
3. the safe extinguishing arc pressure limiting device of one according to claim 1, is characterized in that, described resistance R1 two end node shunt capacitance C2.
4. the safe extinguishing arc pressure limiting device of one according to claim 1, is characterized in that, the control end of described vacuum contactor JZa, JZb, JZc is by wire access controller KWX.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520144806.8U CN204407881U (en) | 2015-03-14 | 2015-03-14 | A kind of safe extinguishing arc pressure limiting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520144806.8U CN204407881U (en) | 2015-03-14 | 2015-03-14 | A kind of safe extinguishing arc pressure limiting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204407881U true CN204407881U (en) | 2015-06-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520144806.8U Expired - Fee Related CN204407881U (en) | 2015-03-14 | 2015-03-14 | A kind of safe extinguishing arc pressure limiting device |
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| CN (1) | CN204407881U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107294079A (en) * | 2017-07-01 | 2017-10-24 | 合肥东玖电气有限公司 | A kind of Intelligent arc extinguishing and overvoltage protection system |
| CN111327034A (en) * | 2018-12-17 | 2020-06-23 | 安徽伟创电力科技有限公司 | Novel high-efficiency arc extinction and overvoltage protection device |
-
2015
- 2015-03-14 CN CN201520144806.8U patent/CN204407881U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107294079A (en) * | 2017-07-01 | 2017-10-24 | 合肥东玖电气有限公司 | A kind of Intelligent arc extinguishing and overvoltage protection system |
| CN111327034A (en) * | 2018-12-17 | 2020-06-23 | 安徽伟创电力科技有限公司 | Novel high-efficiency arc extinction and overvoltage protection device |
| CN111327034B (en) * | 2018-12-17 | 2022-02-18 | 安徽伟创电力科技有限公司 | Arc extinction and overvoltage protection device |
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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: 20150617 Termination date: 20170314 |
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| CF01 | Termination of patent right due to non-payment of annual fee |