WO2018036311A1 - 一种断路器保护方法 - Google Patents

一种断路器保护方法 Download PDF

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Publication number
WO2018036311A1
WO2018036311A1 PCT/CN2017/093592 CN2017093592W WO2018036311A1 WO 2018036311 A1 WO2018036311 A1 WO 2018036311A1 CN 2017093592 W CN2017093592 W CN 2017093592W WO 2018036311 A1 WO2018036311 A1 WO 2018036311A1
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Prior art keywords
circuit breaker
protective casing
air
nitrogen gas
protection
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PCT/CN2017/093592
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English (en)
French (fr)
Inventor
葛轶群
杨晓冬
宗建伟
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江苏省如高高压电器有限公司
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Publication of WO2018036311A1 publication Critical patent/WO2018036311A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
    • H01H11/0062—Testing or measuring non-electrical properties of switches, e.g. contact velocity
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches

Definitions

  • the invention relates to a circuit breaker, in particular to a circuit breaker protection method.
  • ZW20-12 outdoor AC high voltage boundary vacuum circuit breaker is a user demarcation switch. It is mainly composed of three parts: ZW20-12 vacuum circuit breaker body, fault detection controller and external voltage transformer.
  • the conventional method directly fills the circuit breaker with sulfur hexafluoride to ensure its insulation performance.
  • the above-mentioned practice has the following drawbacks: when filling the circuit breaker with sulfur hexafluoride, it is necessary to ensure that the pressure difference between the internal pressure of the circuit breaker and the external pressure does not exceed 0.05 MPa, otherwise the circuit breaker may be broken.
  • the deformation of the casing affects its use; in addition, the circuit breaker itself does not achieve the effect of complete sealing, so there will definitely be some leakage of sulfur hexafluoride, and due to the characteristics of sulfur hexafluoride itself, after the leakage
  • the surrounding environment causes pollution.
  • the technical problem to be solved by the present invention is to provide a circuit breaker protection method, which can effectively avoid deformation of the circuit breaker casing when charging the shielding gas, and avoid leakage of the shielding gas to the environment.
  • the technical solution of the present invention is: a circuit breaker protection device, which is innovative in that the steps are:
  • the circuit breaker to be inflated is installed in a special protection device
  • the protection device comprises a protection unit
  • the protection unit comprises a protection housing
  • the protection housing is a two-end An open hollow cylindrical structure having a cavity mounted in the protective casing, the cavity having a horizontally disposed mounting plate, and a plurality of air ports at the upper end of the protective casing, all of which are connected a trachea, wherein one of the air tubes communicates with a cavity of the protective casing, and the remaining air pipes are connected to the air pipe interface on the circuit breaker installed in the protective casing through a hose, and the two ends of the protective casing are respectively hinged with left and right seals
  • the head unit further includes a gas supply unit, the gas supply unit includes a nitrogen gas chamber arranged in parallel, and an air gas chamber, wherein the air air chamber is connected to the air tube communicating with the cavity of the protection housing through the hose, and the remaining air tube Both are connected to the nitrogen gas chamber through a
  • the circuit breaker detects the leak. First, the helium gas is introduced into the circuit breaker installed in the protective casing through the hose from the corresponding air pipe to check the circuit breaker. If the test is qualified, the process proceeds to the next process. If it is qualified, the unqualified product will be taken out;
  • the circuit breaker is vacuumed, and the protective casing and the qualified circuit breaker installed in the protective casing are vacuumed by the vacuum pump respectively, and the vacuum degree is ⁇ 133 Pa.
  • the protective casing and the open circuit are controlled. The rate of vacuuming between the devices ensures that the pressure difference between the protective casing and the circuit breaker does not exceed 0.05 MPa;
  • the circuit breaker is inflated. After the vacuum is completed, the nitrogen gas chamber is filled with nitrogen gas into the circuit breaker. At the same time as the nitrogen gas is filled, air is introduced into the protective casing from the air chamber, and the inflation amount is one atmosphere. During the inflation process, the rate of inflation between the protective casing and the circuit breaker is controlled to ensure that the pressure difference between the protective casing and the circuit breaker does not exceed 0.05 MPa, and the sum of the inflation time and the vacuuming time is ⁇ 10 min.
  • the mounting plate is movably connected to the protective housing, and the upper end of the mounting plate further has a pair of side-by-side distributed circuit breaker mounted mounting rods.
  • a helium sensor is further mounted in the protective housing.
  • the invention has the advantages that: in the invention, when the circuit breaker is inflated and protected by the method, in the process of vacuuming and inflating, the internal and external pressure difference of the circuit breaker is controlled within 0.05 MPa, thereby effectively avoiding pumping Vacuum or charge protective gas When the circuit breaker case is deformed, the qualified rate of the product is effectively improved; in addition, nitrogen is used instead of the conventional sulfur hexafluoride as a shielding gas. On the basis of ensuring the insulation performance of the circuit breaker, the leakage of nitrogen is not around. The environment causes pollution.
  • the mounting plate and the protective casing By designing the mounting plate and the protective casing to be movably connected, the mounting plate can be removed from the protective casing when the circuit breaker is installed, and after the circuit breaker is installed, the mounting plate is sent into the protective casing to facilitate the circuit breaker. installation.
  • the circuit breaker by providing a helium gas sensor in the protective casing, the circuit breaker can be filled with helium gas for leak detection, and after the leak detection is completed, the gas is returned, and then the circuit breaker is filled with nitrogen gas, thereby ensuring good protection. Its insulation properties.
  • FIG. 1 is a schematic view of a circuit breaker protection device of the present invention.
  • circuit breaker protection method in the present invention is specifically realized by the following steps:
  • the circuit breaker is installed.
  • the circuit breaker 3 to be inflated is installed in a special protection device, as shown in FIG. Including
  • a protection unit comprising a protective housing 1 which is a hollow cylindrical structure with open ends, and a cavity 2 in which the circuit breaker 3 is mounted in the protective housing 1 2 has a horizontally disposed mounting plate 4, a movable connection between the mounting plate 4 and the protective casing 1, and a mounting rod 5 mounted on the upper end of the mounting plate 4 with a pair of side-by-side distributed circuit breakers 3.
  • air ports there are several air ports on the upper end of the protective casing 1, and all the air ports are connected with air pipes.
  • air pipes There are two types of air pipes, respectively, a gas pipe A6 communicating with the cavity of the protective casing 1, and a hose 8 and installation.
  • the air pipe B7 connected to the air pipe interface on the circuit breaker 3 in the protective casing 1 is connected.
  • a left head 9 and a right head 10 are respectively hinged at both ends of the protective casing 1.
  • a gas supply unit comprising a nitrogen gas chamber 11 and an air gas chamber 12 arranged in parallel, the air gas chamber 12 passing through the hose and the air tube A6 Connected, the nitrogen gas chamber 11 is connected to the gas pipe B7 through a hose.
  • a helium gas sensor is also installed in the protective casing 1.
  • the circuit breaker can be filled with helium gas for leak detection, and after the leak detection is completed, the gas is returned, and then the circuit breaker is charged. Nitrogen is introduced to ensure good insulation properties.
  • the circuit breaker detects the leak.
  • the helium gas is introduced into the circuit breaker installed in the protective casing through the hose in the corresponding air pipe, and the circuit breaker is leak-detected. If the test passes, the process proceeds to the next process. If the test fails, the defective product will be taken out.
  • the circuit breaker is evacuated, and the protective casing and the qualified circuit breaker installed in the protective casing are respectively vacuumed by the vacuum pump, and the vacuum degree is ⁇ 133 Pa, and the protective casing is controlled during the vacuuming process.
  • the rate of vacuuming between the circuit breaker and the circuit breaker ensures that the pressure difference between the protective casing and the circuit breaker does not exceed 0.05 MPa.
  • the circuit breaker is inflated.
  • the nitrogen gas chamber is filled with nitrogen gas into the circuit breaker, and while the nitrogen gas is filled, air is introduced into the protective casing from the air gas chamber, and the inflation amount is one atmosphere.
  • the rate of inflation between the protective casing and the circuit breaker is controlled to ensure that the pressure difference between the protective casing and the circuit breaker does not exceed 0.05 MPa, and the sum of the inflation time and the vacuuming time is ⁇ 10 min. .

Abstract

一种断路器保护方法，步骤为：首先，将待进行充气保护的断路器（3）安装在专用保护装置内，先从对应的气管内通过软管（8）向安装在保护壳体（1）内的断路器（3）内通入氦气，对断路器（3）进行检漏，然后通过抽真空泵分别对保护壳体（1）以及安装在保护壳体（1）内的合格的断路器（3）进行抽真空处理，在抽真空完成后，从氮气气室（11）向断路器（3）内充入氮气，在充入氮气的同时，从空气气室（12）向保护壳体（1）内通入空气，充气量为一个大气压。所述保护方法的优点在于：通过在断路器（3）的外端增加一保护壳体（1），能够有效的避免在充入保护气体时断路器壳体发生形变；另外采用氮气取代传统的六氟化硫作为保护气体，在保证断路器绝缘性能的基础上，氮气的泄露也不会对周围的环境造成污染。

Description

一种断路器保护方法 一种断路器保护方法
技术领域
本发明涉及一种断路器,特别涉及一种断路器保护方法。
背景技术
ZW20-12型户外交流高压分界真空断路器是一款用户分界开关. 主要由ZW20-12型真空断路器本体,故障检测控制器及外置电压互感器三大部分组成。
目前，对此种类型的断路器，为了确保其绝缘性能，传统的方式直接向断路器内充入六氟化硫，来确保其绝缘性能。但是上述这种做法，其存在着以下缺陷：在向断路器内充入六氟化硫时，需要确保断路器内部的压强与外部的压强之间的压强差不超过0.05MPa，否则会造成断路器壳体的变形，影响其使用；另外，断路器本身并不能达到完全密封的效果，因此肯定会有部分的六氟化硫泄露，而由于六氟化硫本身的特性，在泄露后会对周围的环境造成污染。
发明内容
本发明要解决的技术问题是提供一种断路器保护方法,能够有效的避免在充入保护气体时断路器壳体发生形变，并避免保护气体的泄露对环境造成污染。
为解决上述技术问题，本发明的技术方案为：一种断路器保护装置,其创新点在于：步骤为：
a）断路器安装，首先，将待进行充气保护的断路器安装在专用保护装置内，所述保护装置包括一保护单元，该保护单元包括一保护壳体，所述保护壳体为一两端开口的空心圆柱体结构，该保护壳体内具有容断路器安装的空腔，该空腔内具有一水平设置的安装板，在保护壳体的上端具有数个气口，所有的气口上均连接有气管，且其中一个气管与保护壳体的空腔相通，其余气管通过软管与安装在保护壳体内的断路器上的气管接口相连，所述保护壳体的两端分别铰接有左、右封头；还包括一供气单元，所述供气单元包括并列设置的一氮气气室、一空气气室，所述空气气室通过软管连接与保护壳体的空腔相通的气管，其余气管均通过软管与氮气气室相连；
b）断路器检漏，先从对应的气管内通过软管向安装在保护壳体内的断路器内通入氦气，对断路器进行检漏，若检测合格则进入下一工序，若检测不合格，则将不合格品取出；
c）断路器抽真空，通过抽真空泵分别对保护壳体以及安装在保护壳体内的合格的断路器进行抽真空处理，且真空度≤133Pa，在抽真空的过程中，控制保护壳体与断路器之间的抽真空的速率，保证保护壳体以及断路器之间的压强差不超过0.05MPa；
d）断路器充气，在抽真空完成后，从氮气气室向断路器内充入氮气，在充入氮气的同时，从空气气室向保护壳体内通入空气，充气量为一个大气压，在充气的过程中，控制保护壳体与断路器之间的充气的速率，保证保护壳体以及断路器之间的压强差不超过0.05MPa，充气的时间与抽真空的时间之和≤10min。
进一步的，所述安装板与保护壳体之间活动连接，在安装板的上端还具有一对并列分布的容断路器安装的安装杆。
进一步的，所述保护壳体内还安装有一氦气传感器。
本发明的优点在于：在本发明中，采用本方法对断路器进行充气保护时，在抽真空与充气的过程中，均控制断路器的内外压强差在0.05MPa内，从而有效的避免在抽真空或是充入保护气体 时，断路器壳体发生形变，有效的提高了产品的合格率；另外采用氮气取代传统的六氟化硫作为保护气体，在保证断路器绝缘性能的基础上，氮气的泄露也不会对周围的环境造成污染。
通过将安装板与保护壳体设计为活动连接，在安装断路器时，可以将安装板从保护壳体内移出，待断路器安装好后，再将安装板送入保护壳体内，从而方便断路器的安装。
在本发明中，通过在保护壳体内设置一氦气传感器，可以先对断路器充入氦气进行检漏，检漏完成后回气，然后再对断路器充入氮气，从而很好的保证其绝缘性能。
附图说明
下面结合附图和具体实施方式对本发明作进一步详细的说明。
图1为本发明的断路器保护装置的示意图。
具体实施方式
下面的实施例可以使本专业的技术人员更全面地理解本发明，但并不因此将本发明限制在所述的实施例范围之中。
本发明中的断路器保护方法具体通过下述步骤得以实现：
第一步，断路器安装，首先将待进行充气保护的断路器3安装在专用保护装置内，该专用保护装置如图1所示， 包括
一保护单元，该保护单元包括一保护壳体1，该保护壳体1为一两端开口的空心圆柱体结构，在保护壳体1内具有容断路器3安装的空腔2，该空腔2内具有一水平设置的安装板4，安装板4与保护壳体1之间活动连接，在安装板4的上端还具有一对并列分布的容断路器3安装的安装杆5。通过将安装板4与保护壳体1设计为活动连接，在安装断路器3时，可以将安装板4从保护壳体1内移出，待断路器3安装好后，再将安装板4送入保护壳体1内，从而方便断路器3的安装。
在保护壳体1的上端具有数个气口，所有的气口上均连接有气管，气管一共有两种，分别为与与保护壳体1的空腔相通的气管A6，以及通过软管8与安装在保护壳体1内的断路器3上的气管接口相连的气管B7。
在保护壳体1的两端分别铰接有左封头9、右封头10。
一供气单元，该供气单元包括并列设置的一氮气气室11、一空气气室12，空气气室12通过软管与气管A6 相连接，氮气气室11通过软管与气管B7相连接。
在保护壳体1内还安装有一氦气传感器，通过在保护壳体内设置一氦气传感器，可以先对断路器充入氦气进行检漏，检漏完成后回气，然后再对断路器充入氮气，从而很好的保证其绝缘性能。
第二步，断路器检漏，先从对应的气管内通过软管向安装在保护壳体内的断路器内通入氦气，对断路器进行检漏，若检测合格则进入下一工序，若检测不合格，则将不合格品取出。
第三步，断路器抽真空，通过抽真空泵分别对保护壳体以及安装在保护壳体内的合格的断路器进行抽真空处理，且真空度≤133Pa，在抽真空的过程中，控制保护壳体与断路器之间的抽真空的速率，保证保护壳体以及断路器之间的压强差不超过0.05MPa。
第四步，断路器充气，在抽真空完成后，从氮气气室向断路器内充入氮气，在充入氮气的同时，从空气气室向保护壳体内通入空气，充气量为一个大气压，在充气的过程中，控制保护壳体与断路器之间的充气的速率，保证保护壳体以及断路器之间的压强差不超过0.05MPa，充气的时间与抽真空的时间之和≤10min。
本行业的技术人员应该了解，本发明不受上述实施例的限制，上述实施例和说明书中描述的只是说明本发明的原理，在不脱离本发明精神和范围的前提下，本发明还会有各种变化和改进，这些变化和改进都落入要求保护的本发明范围内。本发明要求保护范围由所附的权利要求书及其等效物界定。

Claims (3)

  1. 一种断路器保护方法，其特征在于：步骤为：
    a）断路器安装，首先，将待进行充气保护的断路器安装在专用保护装置内，所述保护装置包括一保护单元，该保护单元包括一保护壳体，所述保护壳体为一两端开口的空心圆柱体结构，该保护壳体内具有容断路器安装的空腔，该空腔内具有一水平设置的安装板，在保护壳体的上端具有数个气口，所有的气口上均连接有气管，且其中一个气管与保护壳体的空腔相通，其余气管通过软管与安装在保护壳体内的断路器上的气管接口相连，所述保护壳体的两端分别铰接有左、右封头；还包括一供气单元，所述供气单元包括并列设置的一氮气气室、一空气气室，所述空气气室通过软管连接与保护壳体的空腔相通的气管，其余气管均通过软管与氮气气室相连；
    b）断路器检漏，先从对应的气管内通过软管向安装在保护壳体内的断路器内通入氦气，对断路器进行检漏，若检测合格则进入下一工序，若检测不合格，则将不合格品取出；
    c）断路器抽真空，通过抽真空泵分别对保护壳体以及安装在保护壳体内的合格的断路器进行抽真空处理，且真空度≤133Pa，在抽真空的过程中，控制保护壳体与断路器之间的抽真空的速率，保证保护壳体以及断路器之间的压强差不超过0.05MPa；
    d）断路器充气，在抽真空完成后，从氮气气室向断路器内充入氮气，在充入氮气的同时，从空气气室向保护壳体内通入空气，充气量为一个大气压，在充气的过程中，控制保护壳体与断路器之间的充气的速率，保证保护壳体以及断路器之间的压强差不超过0.05MPa，充气的时间与抽真空的时间之和≤10min。
  2. 根据权利要求1所述的断路器保护方法，其特征在于：所述安装板与保护壳体之间活动连接，在安装板的上端还具有一对并列分布的容断路器安装的安装杆。
  3. 根据权利要求1所述的断路器保护方法，其特征在于：所述保护壳体内还安装有一氦气传感器。
PCT/CN2017/093592 2016-08-26 2017-07-20 一种断路器保护方法 WO2018036311A1 (zh)

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CN106229183A (zh) * 2016-08-26 2016-12-14 江苏省如高高压电器有限公司 一种断路器保护方法
CN111678659A (zh) * 2020-06-09 2020-09-18 江苏省如高高压电器有限公司 一种瓷柱式断路器检漏方法

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