CN101661850B - Protector for preventing interception over-voltage and arc reignition over-voltage of vacuum circuit breaker - Google Patents
Protector for preventing interception over-voltage and arc reignition over-voltage of vacuum circuit breaker Download PDFInfo
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- CN101661850B CN101661850B CN2009100343941A CN200910034394A CN101661850B CN 101661850 B CN101661850 B CN 101661850B CN 2009100343941 A CN2009100343941 A CN 2009100343941A CN 200910034394 A CN200910034394 A CN 200910034394A CN 101661850 B CN101661850 B CN 101661850B
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Abstract
The invention relates to a conversion current and over-voltage protection technology of electric equipment, in particular to a protector for preventing interception over-voltage and arc reignition over-voltage of a vacuum circuit breaker. A valve body of the protector is assembled by mutual series-parallel connection of a column-type valve plate RN1 of a ZnO non-linear resistor, a ring-type valve plate RN2of a Sic non-linear resistor, and a column-type valve plate RN3 of a ZnO non-linear resistor ; then output ends are connected to both ends of breaker movable and stationary main contacts in parallel. The vacuum circuit breaker has the ability of converting current and limiting voltage when the large current is switched on and off, and the function of preventing the interception over-voltage and the arc reignition over-voltage when the low current is switched on and off. When the circuit breaker closes the switch, the current flows from both ends of the main contacts and does not flow in the protector, thus the protector can not have the aging problem, a loop can not cause the reignition over-voltage in the process of switching on and off, thereby protecting the main contact against burning or shortening the service life due to the arc reignition.
Description
Technical field
The present invention relates to the change of current and the over-voltage protection technique of electric equipment, be specifically related to a kind of overvoltage protection device that prevents vacuum circuit-breaker cut-off overvoltage and arc reignition.
Background technology
Overvoltage of Vacuum Disconnectors in Operation is owing to exist inductance, capacitance energy storage element in the circuit, shifts because of energy produces in switching manipulation moment in circuit, to cause what electromagnetic viscosimeter produced.Operating Overvoltage of Vacuum Circuit Breaker is divided into three types: cut-off overvoltage, the overvoltage of repeatedly restriking and three-phase cut-off overvoltage simultaneously.Usually mainly contain the approach of two kinds of solutions: the one, improve structure of contact terminal; The 2nd, at the contact two ends and connecting resistance or adding between wiring on the external circuit or line overvoltage protection over the ground, but at the contact two ends and methods such as arrester valve piece made that connects or capacitance-resistance surge absorber all exist residual voltage and cross high certain technical problem.
Summary of the invention
The technical problem underlying that the present invention will solve is: prevent that vacuum circuit-breaker from producing cut-off overvoltage and the electric orphan overvoltage of restriking.
The technical solution adopted for the present invention to solve the technical problems is: a kind of vacuum circuit-breaker that prevents produces cut-off overvoltage and the superpotential protector of arc reignition; Comprise the ZnO nonlinear resistance column type valve block RN1 of C value for 100-120V/mm, the C value is the ring-like valve block R of the SiC nonlinear resistance of 40-50V/mm
N2With the C value be the ZnO nonlinear resistance column type valve block R of 60-80V/mm
N3, connection in series-parallel is assembled into the valve body of protector each other, output is parallel to the two ends of circuit breaker sound main contact.
Described a kind of vacuum circuit-breaker that prevents produces cut-off overvoltage and the superpotential protector of arc reignition, by ZnO nonlinear resistance column type valve block R
N1With the ring-like valve block R of SiC nonlinear resistance
N2Series connection, ZnO nonlinear resistance column type valve block R
N3Be connected in parallel on R
N2Two ends are formed, and then protector are parallel to the two ends of circuit breaker main contact.
Described ZnO nonlinear resistance column type valve block R
N1And R
N3, discharge capacity is big, can hold height, and non linear coefficient is good, guarantees that contact of breaker has lower residual voltage in the process of the disjunction and the change of current;
The ring-like valve block R of described SiC nonlinear resistance
N2Voltage U during through electric current 10mA
10mAIt is voltage U during through electric current 1mA
1mATwice, be connected in the circuit, the characteristic that its discharge capacity is little, residual voltage is high plays the current-limiting protection effect, protector can too high because of power-supply fluctuation (under the operating mode of maximum peak voltage), can guarantee the breaker safe reliability service yet;
Described ZnO nonlinear resistance column type valve block R
N3, be connected in parallel on the ring-like valve block R of SiC nonlinear resistance
N2Two ends, can limit R
N2Too high residual voltage appears in two ends, thereby makes the overvoltage protection of whole protecting device reach desired value.
The invention has the beneficial effects as follows: vacuum circuit-breaker adopts the present invention's technology, when high-current on-off, has the ability of change of current pressure limiting; , little electric current has the superpotential function of the cut-off overvoltage of preventing and arc reignition when cut-offfing.During breaker closing; Electric current flows through from main contact; Protector internal cause no current flows through and the problem of device aging can not occur, and the loop can not cause arc reignition and overvoltage after main contact dams, thereby the protection main contact can or not reduce useful life because of the arc reignition scaling loss.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
Fig. 1 is an electrical block diagram of the present invention.
Embodiment
As shown in Figure 1, a kind of vacuum circuit-breaker that prevents produces cut-off overvoltage and the superpotential protector of arc reignition, comprises the ZnO nonlinear resistance column type valve block R of C value for 100-120V/mm
N1, the C value is the ring-like valve block R of the SiC nonlinear resistance of 40-50V/mm
N2With the C value be the ZnO nonlinear resistance column type valve block R of 60-80V/mm
N3, the mutual protector valve body that is assembled into of connection in series-parallel is parallel to output at the two ends of circuit breaker sound main contact.
Described a kind of vacuum circuit-breaker that prevents produces cut-off overvoltage and the superpotential protector of arc reignition, by ZnO nonlinear resistance column type valve block R
N1With the ring-like valve block R of SiC nonlinear resistance
N2Series connection, ZnO nonlinear resistance column type valve block R
N3Be connected in parallel on R again again
N2Two ends are formed, then with the protector and the two ends of linking the circuit breaker main contact.
Claims (2)
1. one kind prevents that vacuum circuit-breaker from producing cut-off overvoltage and the superpotential protector of arc reignition, is characterized in that: be the ZnO nonlinear resistance column type valve block R of 100-120V/mm by the C value
N1With the C value be the ring-like valve block R of SiC nonlinear resistance of 40-50V/mm
N2Series connection is the ZnO nonlinear resistance column type valve block R of 60-80V/mm again with the C value
N3Be parallel to R
N2Two ends are assembled into the valve body of protector, output are parallel to the two ends of circuit breaker sound main contact again.
2. a kind of vacuum circuit-breaker that prevents according to claim 1 produces cut-off overvoltage and the superpotential protector of arc reignition, it is characterized in that: the ring-like valve block R of described SiC nonlinear resistance
N2U
10mAVoltage is U
1mATwice.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100343941A CN101661850B (en) | 2009-08-27 | 2009-08-27 | Protector for preventing interception over-voltage and arc reignition over-voltage of vacuum circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100343941A CN101661850B (en) | 2009-08-27 | 2009-08-27 | Protector for preventing interception over-voltage and arc reignition over-voltage of vacuum circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101661850A CN101661850A (en) | 2010-03-03 |
| CN101661850B true CN101661850B (en) | 2012-07-25 |
Family
ID=41789787
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100343941A Active CN101661850B (en) | 2009-08-27 | 2009-08-27 | Protector for preventing interception over-voltage and arc reignition over-voltage of vacuum circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101661850B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102254735A (en) * | 2011-07-08 | 2011-11-23 | 合肥凯高电气设备有限公司 | Protection device having functions of automatic control, energy moving and degradation self-separation for vacuum arc extinguish chamber |
| CN103310078B (en) * | 2013-07-09 | 2015-04-01 | 国家电网公司 | Automatic modeling analysis method for over-voltage level of switching reactor of vacuum circuit breaker |
| CN107069689A (en) * | 2017-05-18 | 2017-08-18 | 安徽天电气技术股份有限公司 | Switch limits device of restriking |
| CN111584175B (en) * | 2020-05-25 | 2021-12-10 | 常州市武进科华电力电子器材有限公司 | Low-voltage surge protector |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5276285A (en) * | 1991-05-17 | 1994-01-04 | Gec Alsthom Sa | High rupture capacity circuit-breaker |
| CN2779570Y (en) * | 2004-10-08 | 2006-05-10 | 朱仲彦 | High energy ZnO and PTC compound component |
| CN201247725Y (en) * | 2008-07-09 | 2009-05-27 | 芮骏 | 3 to 35kV vacuum switch restrike restrainer |
| CN201509072U (en) * | 2009-08-27 | 2010-06-16 | 常州市明及电气技术开发有限公司 | Protection device capable of preventing vacuum circuit breaker from producing cut-off overvoltage and arc restriking overvoltage |
-
2009
- 2009-08-27 CN CN2009100343941A patent/CN101661850B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5276285A (en) * | 1991-05-17 | 1994-01-04 | Gec Alsthom Sa | High rupture capacity circuit-breaker |
| CN2779570Y (en) * | 2004-10-08 | 2006-05-10 | 朱仲彦 | High energy ZnO and PTC compound component |
| CN201247725Y (en) * | 2008-07-09 | 2009-05-27 | 芮骏 | 3 to 35kV vacuum switch restrike restrainer |
| CN201509072U (en) * | 2009-08-27 | 2010-06-16 | 常州市明及电气技术开发有限公司 | Protection device capable of preventing vacuum circuit breaker from producing cut-off overvoltage and arc restriking overvoltage |
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| Publication number | Publication date |
|---|---|
| CN101661850A (en) | 2010-03-03 |
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| CP01 | Change in the name or title of a patent holder |
Address after: The southern city of Changzhou province Jiangsu Fengqi road 213166 Wujin high tech Development Zone No. 15 Patentee after: Jiangsu Ming and electric Limited by Share Ltd Address before: The southern city of Changzhou province Jiangsu Fengqi road 213166 Wujin high tech Development Zone No. 15 Patentee before: Changzhou Mecan Electrical Technology Development Co., Ltd. |