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  • 实验室装修设计接地系统的介绍!
    来源:最新澳门网址大全 浏览: 发布日期:2020-05-19
      在实验室地面设计中,应明确零线和接地线的定义和特点。零线是三相交流电的相位零。在理论状态下,三相交流电相位角之间的夹角为纯120°。当三相电流完全平衡时,中性点对地电压为0伏特,零序电流为0安培。但是,如果零线不接地,由于电流的不平衡,零线的电流会大于0安培,导致中性点漂移。因此,中性点和地球之间会有一定的电压。通过电抗器使发电机在中性点接地,可以避免这种情况。
      In the design of laboratory ground, the definition and characteristics of zero line and ground wire should be made clear. The zero line is the phase zero of three-phase alternating current. In the theoretical state, the angle between the phase angles of three-phase alternating current is pure 120 °. When the three-phase current is completely balanced, the neutral point to ground voltage is 0 V, and the zero sequence current is 0 a. However, if the zero line is ungrounded, the current of the zero line will be greater than 0 a due to the current imbalance, resulting in the neutral point drift. Therefore, there will be a certain voltage between the neutral point and the earth. This situation can be avoided by grounding the generator at the neutral point through the reactor.
      在实验室装修中,保护接地是对设备的金属外壳进行接地,防止漏电、过电压对设备和人体造成伤害的措施。考虑到防爆和设备的危害,一些特殊区域需要进行防静电接地。防静电接地的基本原理是防止静电的产生。有了静电,它可以迅速出口和直接排放到地球。
      In the laboratory decoration, the protective grounding is to ground the metal shell of the equipment to prevent the equipment and human body from being hurt by leakage and overvoltage. Considering the explosion-proof and equipment hazards, some special areas need to be grounded. The basic principle of anti-static grounding is to prevent the generation of static electricity. With static electricity, it can be quickly exported and directly discharged to the earth.
    实验室装修
      防雷接地是指屋顶防雷带直接与建筑物的接地系统连接,在架空线路中是通过避雷器与地面连接,一旦雷电直接放电到地面;混合接地是更常见的接地方式之一,是为了保护接地、设备接地、保护接地等进入同一接地网,与变压器中性点处于同一电位。
      Lightning protection grounding refers to that the roof lightning protection belt is directly connected with the grounding system of the building, in the overhead line, it is connected with the ground through the lightning arrester, once the lightning is discharged directly to the ground; hybrid grounding is one of the most common grounding methods, which is to protect the grounding, equipment grounding, protective grounding, etc. into the same grounding grid, and the neutral point of the transformer is at the same potential.
      接地装置是特殊的,一样的保护接地的一部分,但也有一些更特殊,并不是所有的设备接地可以做的混合系统,所以一些接地的设备需要做独立的接地网络,部分设备接地接地电阻是高于传统混合接地电阻值,也有部分设备接地只能做圆形单点接地禁止地面净。通过屏蔽接地等,也有一些接地设备是反应堆所需要的,如UPS或发电机等。
      The grounding device is a special part of the same protective grounding, but there are some more special, not all equipment grounding can do hybrid system, so some grounding equipment need to do independent grounding network, some equipment grounding resistance is higher than the traditional hybrid grounding resistance value, and some equipment grounding can only do circular single point grounding, forbidding ground cleaning. Through shielding grounding, there are also some grounding equipment needed by the reactor, such as UPS or generator, etc.
      等电位接地是将某些设备的金属外壳或金属管道元件等相当于接地干线的金属部件连接在一起,做相同的电位。
      Equipotential grounding is to connect the metal parts of some equipment, such as metal shell or metal pipe elements, which are equivalent to the grounding main line together to make the same potential.
      将有限设备的金属壳组与金属管道及部件连接在一起而不与接地干线连接而成的网络为局部等电位。
      The network formed by connecting the metal shell group of the limited equipment with the metal pipes and components instead of the grounding main line is local equipotential.
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