CN201509072U - Protection device capable of preventing vacuum circuit breaker from producing cut-off overvoltage and arc restriking overvoltage - Google Patents
Protection device capable of preventing vacuum circuit breaker from producing cut-off overvoltage and arc restriking overvoltage Download PDFInfo
- Publication number
- CN201509072U CN201509072U CN2009200480520U CN200920048052U CN201509072U CN 201509072 U CN201509072 U CN 201509072U CN 2009200480520 U CN2009200480520 U CN 2009200480520U CN 200920048052 U CN200920048052 U CN 200920048052U CN 201509072 U CN201509072 U CN 201509072U
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- CN
- China
- Prior art keywords
- overvoltage
- nonlinear resistance
- cut
- protection device
- vacuum circuit
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- 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.)
- Expired - Lifetime
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Classifications
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- 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
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- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
Abstract
The utility model relates to the commutation and overvoltage protection technologies of electric equipment, particularly relates to a protection device capable of preventing vacuum circuit breaker from producing cut-off overvoltage and arc restriking overvoltage, wherein the valve body of the protection device is formed by assembling a ZnO nonlinear resistance cylindrical valve plate RN1, a SiC nonlinear resistance ring-shaped valve plate RN2 and a ZnO nonlinear resistance cylindrical valve plate RN3 in series-parallel connection, and the output ends are connected to the two ends of a DL dynamic main contact and a static main contact in parallel. The vacuum circuit breaker of the utility model has the functions of commutation and voltage limitation when great current is cut-off, and has the functions of preventing cut-off overvoltage and arc restriking overvoltage when low current is cut-off. When the circuit breaker is switched on, the current flows through the two ends of the main contact, and no current flows through the interior of the protection device, therefore the protection device is not subject to aging and no arc restriking overvoltage can be caused during the cut-off of the circuit, thereby protecting the main contact from burnout or reducing service life due to the arc restriking.
Description
Technical field
The utility model relates to the change of current and the over-voltage protection technique of electric equipment, is 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 to cause what electromagnetic viscosimeter produced in circuit.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.
The utility model content
The main technical problems to be solved in the utility model is: prevent that vacuum circuit-breaker from producing cut-off overvoltage and arc reignition overvoltage.
The technical scheme that its technical problem that solves the utility model adopts is: 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, connection in series-parallel is assembled into the valve body of protector mutually, output is parallel to the two ends of DL 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
N2V
10maVoltage almost is V
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 beneficial effects of the utility model are: vacuum circuit-breaker adopts the utility model technology, has the ability of change of current pressure limiting when high-current on-off; When cut-offfing, little electric current has the superpotential function of the cut-off overvoltage of preventing and arc reignition.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 drawings and Examples the utility model is further specified.
Fig. 1 is the utility model electrical block diagram.
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 DL 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 the RN2 two ends again again and form, then with the protector and the two ends of linking the circuit breaker main contact.
Claims (3)
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
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, connection in series-parallel is assembled into the valve body of protector mutually, output is parallel to the two ends of DL 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: 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 receiving the circuit breaker main contact.
3. 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
N2V
10maVoltage almost is V
1maTwice.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200480520U CN201509072U (en) | 2009-08-27 | 2009-08-27 | Protection device capable of preventing vacuum circuit breaker from producing cut-off overvoltage and arc restriking overvoltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200480520U CN201509072U (en) | 2009-08-27 | 2009-08-27 | Protection device capable of preventing vacuum circuit breaker from producing cut-off overvoltage and arc restriking overvoltage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201509072U true CN201509072U (en) | 2010-06-16 |
Family
ID=42470194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200480520U Expired - Lifetime CN201509072U (en) | 2009-08-27 | 2009-08-27 | Protection device capable of preventing vacuum circuit breaker from producing cut-off overvoltage and arc restriking overvoltage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201509072U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102394562A (en) * | 2011-10-28 | 2012-03-28 | 深圳可雷可科技股份有限公司 | ZnO and SiC composite circuit for generator rotor de-excitation and overvoltage protection |
| CN101661850B (en) * | 2009-08-27 | 2012-07-25 | 常州市明及电气技术开发有限公司 | Protector for preventing interception over-voltage and arc reignition over-voltage of vacuum circuit breaker |
| CN103326343A (en) * | 2013-06-24 | 2013-09-25 | 国家电网公司 | Method for restraining vacuum circuit breaker current interception based on waveform analysis |
| CN105356436A (en) * | 2014-08-18 | 2016-02-24 | 上海舒盈电气有限公司 | Multi-functional integrated circuit protection device |
-
2009
- 2009-08-27 CN CN2009200480520U patent/CN201509072U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101661850B (en) * | 2009-08-27 | 2012-07-25 | 常州市明及电气技术开发有限公司 | Protector for preventing interception over-voltage and arc reignition over-voltage of vacuum circuit breaker |
| CN102394562A (en) * | 2011-10-28 | 2012-03-28 | 深圳可雷可科技股份有限公司 | ZnO and SiC composite circuit for generator rotor de-excitation and overvoltage protection |
| CN102394562B (en) * | 2011-10-28 | 2014-02-26 | 深圳可雷可科技股份有限公司 | ZnO and SiC composite circuit for generator rotor de-excitation and overvoltage protection |
| CN103326343A (en) * | 2013-06-24 | 2013-09-25 | 国家电网公司 | Method for restraining vacuum circuit breaker current interception based on waveform analysis |
| WO2014206006A1 (en) * | 2013-06-24 | 2014-12-31 | 国家电网公司 | Method for waveform-analysis-based vacuum circuit breaker chopping current suppression method |
| CN105356436A (en) * | 2014-08-18 | 2016-02-24 | 上海舒盈电气有限公司 | Multi-functional integrated circuit protection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20100616 Effective date of abandoning: 20090827 |