Effective grounding

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2018-03-27 03:27:07

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To protect man from the harmful effects of the properties of electricity are subject to special protective devices, RCD, fuses, automatic circuit breakers (circuit breakers) and other security tools. The most popular system of human security is considered to be a ground loop. This is a specific grounding device, the purpose of which is to connect “ground” the individual parts of the electrical equipment. Or in other words, connected to each other in horizontal and vertical plane electrodes (divertors), placed under the surface of the ground to a predetermined depth.

The loop resistance is affected by:

  • The type structure and the condition of the soil;
  • Properties of electrodes;
  • The depth of the electrodes;
  • The number of electrodes.

grounding

Functionally, the ground is divided into two types:

  • Protective is designed to protect devices that run on electricity from a short circuit, the people from the harmful effects of dangerous currents that occur at the time of the fault.
  • Working – maintains the required performance of electric installation using its grounding of live parts.

The Process of creating a contour

Do not be afraid of the question of how to make a ground loop, because you can assemble it in practice raises serious difficulties. In the role of divertors for grounding may be suitable metal corners with face width of 45 mm and 60 mm, pipes of different diameter. The ground in a triangle is good because when a possible violation of the connection of the diverter in one of the lines parallel to the line remains in a healthy state.

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how to make groundingBest for mounting circuit peaty soil type is loam and clay with high degree of humidity. The worst type of soil-rocky soil.

It is Recommended to choose a certain place to collect the ground loop, the best place is the area around the switchgear. The grounding conductor shall be of copper alloy or of mild steel or galvanized without painting.

With a Shovel dug a trench in the shape of a triangle, the sides of 3 meters, the depth is small - about 0.5-0.8 meters. In the vertices of the triangle hammered steel ground wire length is 2,5-3 meters. The ends can be sharpened to the metal more easily into the ground. Above the ground leaving a bit, up to 20 cm, is welded thereto a horizontal steel strip leading to the power panel. The weld will not be superfluous to handle anti-rust paint or, for example, bitumen.measurement of grounding

After installation, measure the ground loop, which is carried out control measurement of level of resistance. This is done with instrument called a megger. Further repeated measurements do at least 1 time per year. To do this through the grounding device have to close the artificial circuit with electric current, then make control measurements of the voltage drop in the circuit. Adjacent to the main electrode placed auxiliary connect it to the source. A measuring device near the zero potential for a fixed value of the voltage drop on the primary electrode. By this method the ground loop is measured more often than other methods.


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Alin Trodden - author of the article, editor
"Hi, I'm Alin Trodden. I write texts, read books, and look for impressions. And I'm not bad at telling you about it. I am always happy to participate in interesting projects."

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