WO2003023803A1 - Procede permettant d'eviter les arcs electriques et moyen de suppression d'arc transitoire a l'aide dudit procede - Google Patents
Procede permettant d'eviter les arcs electriques et moyen de suppression d'arc transitoire a l'aide dudit procede Download PDFInfo
- Publication number
- WO2003023803A1 WO2003023803A1 PCT/CN2002/000620 CN0200620W WO03023803A1 WO 2003023803 A1 WO2003023803 A1 WO 2003023803A1 CN 0200620 W CN0200620 W CN 0200620W WO 03023803 A1 WO03023803 A1 WO 03023803A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- resistor
- contact
- current
- arc extinguishing
- extinguishing device
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
- H01H33/16—Impedances connected with contacts
- H01H33/161—Variable impedances
Definitions
- the invention belongs to the field of electricity, and relates to a method for avoiding arc generation when a power switch is turned on and a device for preventing arc generation designed according to the method.
- the power switch working in the power system is mainly used to disconnect, connect the load current and change the wiring mode.
- the power switch will generate a large arc when breaking the load current or fault current.
- the powerful energy of the arc usually affects the service life of the switch. When it is severe, it will cause the switch to explode. Therefore, the arc must be extinguished inside the power switch.
- Installation Arc extinguishing device Currently, oil-immersed cooling, elongation, and the use of zero crossings of alternating current are used to extinguish the arc, but the effect is not ideal, especially when encountering capacitive or inductive load current and DC current. Summary of the invention:
- the invention designs a new arc extinguishing method and an arc extinguishing device adopting the method, which can completely eliminate the arc when the switch is disconnected, connect the load current and change the wiring mode, and realize efficient and safe arc extinguishing.
- the content of the present invention is: A method for avoiding the occurrence of an arc, in which a composite resistor is connected in series in a switching circuit, and the resistance value of the series compound resistance is gradually increased with the start of the switch disconnection, and then the circuit is disconnected when the maximum value is reached.
- a transient arc extinguishing device adopting the above method includes a moving contact and a static contact, and a composite resistor is extended on the moving contact or the static contact.
- the above composite resistor is formed by stacking a plurality of current resistors directly contacting a static contact or a moving contact with a plurality of resistors at the time of breaking.
- the above-mentioned composite resistor is formed by connecting a plurality of current-sharing pieces which are directly in contact with the static contact or the moving contact and are fixed on the insulation plate when they are disconnected, respectively.
- the composite resistor is mounted on a moving contact, it is cylindrical.
- the composite resistor When the composite resistor is mounted on a static contact, it is cylindrical.
- the composite resistor may be square.
- the material of the resistor is zinc oxide.
- the resistance piece close to the composite resistor and the corresponding contact is made of a high-current resistance material.
- the above-mentioned high-current resistance material is carbon.
- the composite resistance is connected in series in the switching circuit and gradually increases with the breaking resistance of the switch, that is, the series resistance is a sliding resistance.
- the voltage is constant according to Ohm's law, the current is inversely proportional to the resistance. The current is minimized, and the circuit is disconnected at this time.
- the composite resistor extends on the moving contact or static contact, so when the switch is turned off, with the relative movement of the dynamic and static contact, the composite resistance is gradually connected in series between the dynamic and static contact.
- the voltage divided by the composite resistor also gradually increases, and the current carried by the dynamic and static contacts through the composite resistor gradually decreases.
- the switch is turned off. That is, an arc that may be generated by a large current when the dynamic and static contacts of a circuit breaker carrying a large current or an inductor or a capacitor is broken, cannot be formed due to the large current being divided by the composite resistor, thereby achieving the purpose of efficient and safe arc extinguishing.
- the composite resistor used in the present invention that functions as a sliding variable resistor is formed by stacking a plurality of current sharing plates and resistor plates spaced apart.
- the contact between the dynamic and static contacts is mainly to reduce the contact resistance with the contacts and to prevent the uneven current distribution inside the resistor sheet.
- the resistor chip uses zinc oxide non-linear varistor, which can divide voltage well, reduce the volume compared with conventional linear resistors, and the first or second resistor chip that first contacts the corresponding moving or static contact when breaking, because it may carry a large current Materials that can withstand large currents, such as alloy materials similar to electric furnace wires, constantan materials, carbon, etc. should be used to improve the ability to withstand large currents.
- FIG. 1 is a schematic structural diagram of a composite arc resistor with a static contact extended by a transient arc extinguishing device placed in a fuel tank.
- FIG. 2 is a schematic structural diagram of a moving contact extension composite resistor placed in a fuel tank by a transient arc extinguishing device.
- FIG. 3 is a schematic diagram of the interval setting of the composite resistance current sharing sheet and the resistor sheet of the present invention.
- FIG. 4 is a schematic structural diagram of a compound resistor extending on the conductive rod of the present invention when the conductive rod is a moving contact.
- FIG. 5 is a schematic structural diagram of an embodiment in which a composite resistor and a switch of the present invention are connected in series. detailed description:
- Embodiment 1 shows a composite resistor extending from the static contact.
- the fuel tank 1 is provided with a fuel tank cap 2, the moving contact 3 penetrates into the static contact 4, and a composite resistor 5 extends above the static contact 4.
- the composite resistor 5 is cylindrical, and the composite resistor 5 is composed of multiple The resistor sheet 6 and the current sharing sheet 7 are superimposed and spaced apart (see Figure 3).
- the diameter of the current sharing sheet 7 is larger than that of the resistor sheet 6.
- the resistor 5 is shunted into the switch circuit in series to shunt the voltage between the dynamic and static contacts and reduce the current through the resistor chip.
- the switch is completely disconnected, the connected resistance is the largest and the current is reduced to the minimum. At this time, simply high voltage cannot form. Arc, so as to achieve the purpose of efficient arc extinguishing.
- Embodiment 2 A cylindrical composite resistor 5 is extended on the moving contact 3.
- the composite resistor 5 is also formed by stacking a plurality of resistor plates 6 and current sharing plates 7 at intervals. When the dynamic and static contacts are separated, the current sharing plates 7 are in contact with the static contacts 4 respectively, that is, the composite resistor 5 is connected in series to the switching circuit. Diversion is performed to achieve the purpose of efficient arc extinguishing.
- a compound resistor is connected in series to the SN1-10 switch for arc extinguishing.
- Example 3 See FIG. 4, where a compound resistor is connected in series to a compound switch used in a reactive power compensation cabinet for arc extinguishing.
- the conductive rod of the present invention is a moving contact 3 on which a composite resistor 5 is extended.
- the composite resistor 5 is sequentially connected to each Static contacts 4, when the static contact 4 and the moving contact 3 are completely disconnected, the composite resistor 5 and the static contact 4
- the contact area is the largest and the resistance is the largest, which can effectively prevent the generation of an arc.
- the composite resistor 5 in this embodiment is square.
- the composite resistor is installed inside the switch, and is connected with the moving contact or the static contact as a whole.
- the composite resistor can also be constituted by a sliding resistance formed with the conductive rod on the outside of the switch and connected in series with the switch. Such as making a current limiter separately and using the existing switch in series.
- the composite resistor of FIG. 5 is composed of an electrode plate 7 ′ used as a current-sharing sheet, and a plurality of electrode plates 7 ′ are fixed on the insulating plate 8.
- the plurality of electrode plates 7 ′ are connected to the respective resistors 6 ′ through wires, and the current is uniformly distributed.
- the sheet is only used as the electrode plate 7 ', and the resistor 6' is not superimposed on the current plate with a resistor plate, but can be placed elsewhere and only connected to the electrode plate 7 'serving as a current plate.
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
Description
避免电弧产生的方法和使用该方法的过渡灭弧装置 技术领域：
本发明属于电气领域， 涉及电力开关断合时避免电弧产生的方法和依 照该方法设计的避免电弧产生的装置。 技术背景：
工作于电力系统的电力开关， 主要作用是分断、 连通负荷电流和改变 接线方式。 电力开关在分断负荷电流或故障电流时会产生很大的电弧， 电 弧所具有的强大能量通常会影响开关的使用寿命， 严重时会引起开关爆炸， 故电力开关内部必须采用熄灭电弧的方法， 安装熄灭电弧的装置。 目前通 常采用油浸冷却、 拉长和利用交流电的过零点来熄灭电弧， 但是效果并不 理想， 特别当遇到电容性或电感性负荷电流和直流电时很难熄灭电弧。 发明内容：
本发明设计一种新的灭弧方法和采用该方法的灭弧装置， 能够彻底消 除开关分断、 连通负荷电流和改变接线方式时的电弧， 实现高效安全灭弧。
本发明的内容是： 一种避免电弧产生的方法， 在开关回路中串联复合 电阻,并且使所串联的复合电阻的电阻值随着开关分断的开始逐渐变大， 直 到最大时回路再分断。
一种采用上述方法的过渡灭弧装置， 它包括一动触头和一静触头， 在 所述的动触头或静触头上延伸出一个复合电阻。
上述复合电阻由多个分断时直接与静触头或动触头接触的均流片同多 个电阻片间隔叠加而成。
上述复合电阻由多个分断时直接与静触头或动触头接触的且固定在绝 缘板上的均流片分别同多个电阻相联接而成。
上述复合电阻装在动触头上时为圆柱状。
上述复合电阻装在静触头上时为圆筒状。
上述复合电阻还可以是方形。
上述电阻片的材料采用氧化锌。
上述复合电阻与对应触头相接近的电阻片采用耐大电流电阻材料。 上述耐大电流电阻材料选用炭精。
本发明由于在开关回路中串联复合电阻并且随着开关的分断电阻逐渐 变大， 即所串联的复合电阻为一滑变电阻， 根据欧姆定律电压一定时电流 和电阻成反比， 当电阻到最大时电流到最小,此时回路断开，断口上虽然有很 高的电压可以击穿气隙，但是没有电流或电流极小无法提供能量电弧无法形 成， 从而起到避弧的目的。 也即由于在动触头或静触头上延伸出一个复合 电阻， 这样在开关分断时， 随着动静触头的相对运动， 复合电阻逐渐被串 联进动静触头之间， 由于复合电阻的逐渐导入， 被复合电阻分载的电压也 逐渐增大， 而动静触头经复合电阻承载的电流就逐渐减小， 当电流减小到 几豪安时再分断开关。 即承载大电流或电感或电容的断路器动静触头分断 时大电流可能产生的电弧由于大电流被复合电阻分压而无法形成， 从而达 到高效安全灭弧的目的。 本发明采用的起滑变电阻作用的复合电阻由多个 均流片和电阻片间隔叠加而成， 开关在分断时上述的均流片与对应的静、 动触头接触， 而电阻片不与动静触头接触， 这样做主要是为了减少与触头 的接触电阻和防止电阻片内部的电流分布不均。 电阻片使用氧化锌非线性 压敏电阻可以很好分压，比常规线性电阻减小体积， 在分断时与对应动或静 触头首先接触的第一或第二片电阻片由于可能承载大电流， 应采用耐大电 流的材料， 如与电炉丝同类的合金材料， 康铜材料， 炭精等以提高承受大 电流的能力。
附图的简要说明- 图 1是过渡灭弧装置置于油箱内静触头延伸复合电阻的结构示意图。 图 2是过渡灭弧装置置于油箱内动触头延伸复合电阻的结构示意图。 图 3是本发明复合电阻均流片和电阻片的间隔设置示意图。
图 4是本发明导电杆为动触头时其上延伸复合电阻的结构示意图。 图 5是本发明复合电阻与开关进行串接使用的实施例结构示意图。 具体实施方式：
实施例 1 : 附图 1所显示的是在静触头上延伸出一个复合电阻。图中油 箱 1设置有油箱盖 2， 动触头 3探入静触头 4内，在静触头 4上部延伸一复 合电阻 5，在此复合电阻 5为圆筒状， 复合电阻 5由多个电阻片 6和均流片 7间隔叠合而成（见图 3 )， 均流片 7径长大于电阻片 6， 在动静触头分开时 均流片 7分别与动触头接触， 也即将复合电阻 5串联进开关电路进行分流， 通过电阻片将动静触头间的电压分载并削弱电流， 当开关完全分断时连入 的电阻最大， 电流被削减到最小， 此时单纯有高电压无法形成电弧， 从而 实现高效灭弧的目的。
实施例 2: 在动触头 3上延伸一圆柱状复合电阻 5。 所述复合电阻 5同 样由多个电阻片 6和均流片 7间隔叠合而成， 当动静触头分开时均流片 7 分别与静触头 4接触， 也即将复合电阻 5串联进开关电路进行分流， 从而 实现高效灭弧的目的。
实施例 1和实施例 2均是在 SN1-10开关上串接复合电阻进行灭弧 实施例 3 : 见图 4， 是在无功补偿柜中用的复合开关上串接复合电阻进 行灭弧。 图中的静触头 4有多个， 本发明导电杆为动触头 3 , 其上延伸复合 电阻 5， 当动触头依次从各个静触头 4上退出时， 复合电阻 5依次接入每个 静触头 4， 在该静触头 4与动触头 3完全断开时， 复合电阻 5与该静触头 4
接触面积最大， 电阻最大， 能有效阻止电弧的产生， 本实施例的复合电阻 5 为方形。
实施例 4:上述实施例均是将复合电阻装在开关内部， 与动触头或静触 头连为一体， 复合电阻还可以和导电杆构成滑变电阻独立地装在开关外边 和开关串联， 如单独做成限流器和现有的开关串联使用。 图 5 的复合电阻 由作为均流片使用的电极板 7'， 多个电极板 7' 固定在绝缘板 8上， 多个 电极板 7' 通过导线与各自的电阻 6'相连， 在此均流片只是作为电极板 7' 使用， 电阻 6' 也不是以电阻片与均流片叠加， 而是可以放在其他地方只是 和起均流片作用的电极板 7' 相连。
Claims
1 . 一种避免电弧产生的方法， 其特征是在开关回路中串联复合电阻, 并且使所串联的复合电阻的电阻值随着开关分断的开始逐渐变大， 直到最 大时回路再分断。
2. 根据权利要求 1所述的避免电弧产生的方法， 其特征在于所述复合 电阻由多个分断时直接与静触头或动触头接触的均流片同多个电阻片间隔 叠加而成。
3. 根据权利要求 1所述的避免电弧产生的方法， 其特征在于所述复合 电阻由多个分断时直接与静触头或动触头接触的且固定在绝缘板上的均流 片分别同多个电阻相联接而成。
4. 一种采用上述方法的过渡灭弧装置， 它包括一动触头和一静触头， 其特征在于在所述的动触头或静触头上延伸出一个复合电阻。
5. 根据权利要求 4所述的过渡灭弧装置， 其特征在于所述复合电阻由 多个分断时直接与静触头或动触头接触的均流片同多个电阻片间隔叠加而 成。
6. 根据权利要求 5或 4所述的过渡灭弧装置， 其特征在于所述复合电 阻装在动触头上时为圆柱状。
7. 根据权利要求 5或 4所述的过渡灭弧装置， 其特征在于所述复合电 阻装在静触头上时为圆筒状。
8. 根据权利要求 5所述的过渡灭弧装置， 其特征在于所述电阻片的材 料采用氧化锌。
9. 根据权利要求 5所述的过渡灭弧装置， 其特征在于所述复合电阻与 对应触头最接近的电阻片釆用耐大电流电阻材料。
10. 根据权利要求 9所述的过渡灭弧装置， 其特征在于所述耐大电流 电阻材料选用炭精。
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01142058 CN1251262C (zh) | 2001-09-10 | 2001-09-10 | 避免电弧产生的方法和使用该方法的过渡灭弧装置 |
| CN01142058.8 | 2001-09-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2003023803A1 true WO2003023803A1 (fr) | 2003-03-20 |
Family
ID=4676594
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/CN2002/000620 WO2003023803A1 (fr) | 2001-09-10 | 2002-09-05 | Procede permettant d'eviter les arcs electriques et moyen de suppression d'arc transitoire a l'aide dudit procede |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN1251262C (zh) |
| WO (1) | WO2003023803A1 (zh) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105206448A (zh) * | 2014-06-30 | 2015-12-30 | 赵劲帅 | 一种安全电力开关 |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106653492A (zh) * | 2015-10-29 | 2017-05-10 | 茆敦华 | 具有串阻式电路分合系统的交(直)流无弧接触器 |
| CN113725047A (zh) * | 2020-05-26 | 2021-11-30 | 国网福建省电力有限公司 | 一种静触头和开关装置 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5276285A (en) * | 1991-05-17 | 1994-01-04 | Gec Alsthom Sa | High rupture capacity circuit-breaker |
| CN2157585Y (zh) * | 1993-06-30 | 1994-02-23 | 吴江开关总厂 | 复合型真空有载分接开关的动触头机构 |
| CN2189350Y (zh) * | 1994-01-24 | 1995-02-08 | 王勇雄 | 消弧线圈负荷开关 |
| DE20008036U1 (de) * | 2000-05-04 | 2000-08-03 | Sero Schroeder Elektronik Rohr | Schaltungsanordnung zur Unterdrückung eines Lichtbogens bei einem Schaltkontakt |
| JP2000311536A (ja) * | 1999-04-26 | 2000-11-07 | Toshiba Corp | ガス絶縁開閉器 |
-
2001
- 2001-09-10 CN CN 01142058 patent/CN1251262C/zh not_active Expired - Fee Related
-
2002
- 2002-09-05 WO PCT/CN2002/000620 patent/WO2003023803A1/zh not_active Application Discontinuation
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5276285A (en) * | 1991-05-17 | 1994-01-04 | Gec Alsthom Sa | High rupture capacity circuit-breaker |
| CN2157585Y (zh) * | 1993-06-30 | 1994-02-23 | 吴江开关总厂 | 复合型真空有载分接开关的动触头机构 |
| CN2189350Y (zh) * | 1994-01-24 | 1995-02-08 | 王勇雄 | 消弧线圈负荷开关 |
| JP2000311536A (ja) * | 1999-04-26 | 2000-11-07 | Toshiba Corp | ガス絶縁開閉器 |
| DE20008036U1 (de) * | 2000-05-04 | 2000-08-03 | Sero Schroeder Elektronik Rohr | Schaltungsanordnung zur Unterdrückung eines Lichtbogens bei einem Schaltkontakt |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105206448A (zh) * | 2014-06-30 | 2015-12-30 | 赵劲帅 | 一种安全电力开关 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1404085A (zh) | 2003-03-19 |
| CN1251262C (zh) | 2006-04-12 |
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