{"id":98676,"date":"2024-01-15T12:16:09","date_gmt":"2024-01-15T10:16:09","guid":{"rendered":"https:\/\/gahzly.com\/%d9%83%d9%8a%d9%81%d9%8a%d8%a9-%d9%82%d9%8a%d8%a7%d8%b3-%d9%85%d9%82%d8%a7%d9%88%d9%85%d8%a9-%d8%a7%d9%84%d8%aa%d8%a3%d8%b1%d9%8a%d8%b6\/"},"modified":"2024-01-15T12:22:10","modified_gmt":"2024-01-15T10:22:10","slug":"how-to-measure-grounding-resistance","status":"publish","type":"post","link":"https:\/\/gahzly.com\/en\/\u0645\u0642\u0627\u0644\/how-to-measure-grounding-resistance\/","title":{"rendered":"How to measure grounding resistance"},"content":{"rendered":"
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How to measure grounding resistance<\/span><\/span><\/h2>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
\"How
How to measure grounding resistance<\/span><\/span><\/figcaption><\/figure>\n

Grounding resistance is vital in the field of electricity, playing a crucial role in ensuring the safety of personnel and equipment. Measuring ground resistance is a necessary procedure to check the efficiency of electrical systems and ensure that the connection between the system and the ground is made correctly. In this article, we will take a look at how to measure grounding resistance and its importance in keeping the environment and individuals safe.<\/span><\/span><\/p>\n

The importance of measuring grounding resistance:<\/span><\/span><\/strong><\/p>\n

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  1. Ensuring the Safety of Personnel:<\/span><\/span><\/strong> Measuring grounding resistance is an essential part of electrical safety procedures, as it helps determine whether the ground is capable of effectively discharging excess electrical currents, reducing the risk of Exposure to electric shock.<\/span><\/span><\/li>\n
  2. Equipment Protection:<\/span><\/span><\/strong> The grounding resistance measurement measures the effectiveness of the connection between the electrical system and the ground, thus protecting the equipment from damage resulting from excessive currents and ensuring its efficient operation.<\/span><\/span><\/li>\n
  3. Standards Compliance:<\/span><\/span><\/strong> Most electrical standards and regulations require grounding resistance measurement as part of regular maintenance of electrical systems, to ensure compliance with industry and safety standards.<\/span><\/span><\/li>\n<\/ol>\n

    How to measure grounding resistance:<\/span><\/span><\/strong><\/p>\n

    Earthing resistance is measured using a device known as an \u201cearth resistance meter.\u201d Or “ohm meter”. The main steps to measure grounding resistance include:<\/span><\/span><\/p>\n

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    1. Site Preparation:<\/span><\/span><\/strong> This step involves ensuring that the ground is well connected and free of obstructions. Sites designated for grounding measurement must be cleaned of dust and dirt.<\/span><\/span><\/li>\n
    2. Connecting the terminals:<\/span><\/span><\/strong>The technician connects the terminals of the grounding resistance measuring device to the ground and the electrical system to be examined.<\/span><\/span><\/li>\n
    3. Resistance measurement:<\/span><\/span><\/strong> The device is turned on and the grounding resistance between the system and the ground is measured. The grounding resistance is specified in \u201cohms\u201d, and the value displayed on the device screen is read.<\/span><\/span><\/li>\n
    4. Compliance verification:<\/span><\/span><\/strong>The measured value is compared to the values \u200b\u200bspecified in industry standards and local regulations to ensure compliance.<\/span><\/span><\/li>\n<\/ol>\n
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      Calculating grounding resistance using the voltage drop method:<\/span><\/span><\/strong><\/p>\n

      The fall-of-potential method is one of the main methods used to measure grounding resistance. The measurement is made using an Earth tester, and the test is performed before connecting the electrical service to the consumer. The process includes the following:<\/span><\/span><\/p>\n

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      1. Determining measurement points:<\/span><\/span><\/strong> The reference electrode whose resistance will be measured is selected, and two auxiliary electrodes are buried at a depth ranging from 30 to 60 cm in the soil. One electrode is used to measure current C, and the other to measure voltage P.<\/span><\/span><\/li>\n
      2. Connecting the device:<\/span><\/span><\/strong> The earth resistance measuring device is connected to the reference electrode and two auxiliary electrodes. The device is set to measure using a voltage drop method.<\/span><\/span><\/li>\n
      3. Generate a test current:<\/span><\/span><\/strong>The device generates a test current (C) flowing through the ground and the voltage drop between the reference electrode and the auxiliary electrode (P) is measured.<\/span><\/span><\/li>\n
      4. Voltage and Current Measurement:<\/span><\/span><\/strong> The voltage (P) generated by the test current and the current (C) passing through the ground are measured. Both readings are recorded.<\/span><\/span><\/li>\n
      5. Calculating grounding resistance:<\/span><\/span><\/strong>The grounding resistance is calculated using the relationship: <\/span><\/span>\ufffd=\ufffd\ufffd<\/span><\/span><\/span>R<\/span>R a><\/span><\/span><\/span><\/span><\/span><\/span><\/span> where <\/span> is the current Test.<\/span>I<\/span><\/span><\/span><\/span><\/span><\/span>\ufffd<\/span><\/span><\/span><\/span> is the voltage drop (P voltage), and <\/span> V<\/span><\/span><\/span><\/span><\/span><\/span>\ufffd<\/span><\/span><\/span><\/span> is the grounding resistance,<\/span>R<\/span><\/span><\/span><\/span><\/span><\/span><\/span>\ufffd<\/span><\/span><\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>V<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>I<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>=<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/li>\n
      6. Analysis of readings:<\/span><\/span><\/strong> Compares the calculated grounding resistance value with accepted values \u200b\u200band industry standards to ensure compliance and system safety.<\/span><\/span><\/li>\n<\/ol>\n

        This method is considered reliable and effective for estimating grounding resistance, and contributes to ensuring the safety of electrical systems and their users.<\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

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        \"How
        How to measure grounding resistance<\/span><\/span><\/figcaption><\/figure>\n

        Measuring grounding resistance using Ohm’s law:<\/span><\/span><\/strong><\/p>\n

        The voltage drop method is used to measure grounding resistance, whereby an alternating current<\/span><\/span>\ufffd<\/span><\/span><\/span>I<\/span><\/span><\/span><\/span><\/span><\/span><\/span>is passed through the external electrode<\/span>, at a midpoint between them. The device follows Ohm’s law to calculate ground resistance.<\/span> \/span><\/span>\ufffd<\/span><\/span><\/span><\/span>, and the voltage is measured across an internal electrode<\/span>C<\/span><\/span><\/span><\/span><\/span><\/span><\/span>\ufffd<\/span><\/span><\/span><\/span><\/span><\/p>\n

        Measurement steps:<\/span><\/span><\/strong><\/p>\n

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        1. Clarification of the two situations:<\/span><\/span><\/strong>\n