How to check Earthing with Megger 2020 | Grounding Testing Megger
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How to check Earthing with
How to check Earthing with Megger 2020 | Grounding Testing Megger
Earthing and earthing test is briefly explained in this video
Earth Resistance
Definition: The resistance offered by the earth electrode to the flow of current into the ground is known as the earth resistance or resistance to earth. The earth resistance mainly implies the resistance between the electrode and the point of zero potential. Numerically, it is equal to the ratio of the potential of the earth electrode to the current dissipated by it. The resistance between the earthing plate and the ground is measured by the potential fall method.
The value of the earth resistance for different power stations is shown below
earthing \ earthing test
Large Power Station – 0.5 ohms
Major Power Station – 1.0 ohms
Small Substation – 2.0 ohms
In all other cases – 8.0 ohms
The region around the earth in which the electrode is driven is known as the resistance area or potential area of the ground. The fault current which is injected from the earth electrode is passing away from the electrode in all directions shown below in the figure. The flow of current into the grounds depends on the resistivity of the soil in which the earth electrode is placed. The resistivity of the soil may vary from 1 to 1000 ohm-m depends on the nature of the soil for earthing with earthing test.
How to check Earthing with Megger 2020 | Grounding Testing Megger
grounding test procedure,earthing,grounding,earthing system,lightning,earth,rod,earth pit,lightning rod,protection
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Earthing and earthing test is briefly explained in this video
Earth Resistance
Definition: The resistance offered by the earth electrode to the flow of current into the ground is known as the earth resistance or resistance to earth. The earth resistance mainly implies the resistance between the electrode and the point of zero potential. Numerically, it is equal to the ratio of the potential of the earth electrode to the current dissipated by it. The resistance between the earthing plate and the ground is measured by the potential fall method.
The value of the earth resistance for different power stations is shown below
earthing \ earthing test
Large Power Station – 0.5 ohms
Major Power Station – 1.0 ohms
Small Substation – 2.0 ohms
In all other cases – 8.0 ohms
The region around the earth in which the electrode is driven is known as the resistance area or potential area of the ground. The fault current which is injected from the earth electrode is passing away from the electrode in all directions shown below in the figure. The flow of current into the grounds depends on the resistivity of the soil in which the earth electrode is placed. The resistivity of the soil may vary from 1 to 1000 ohm-m depends on the nature of the soil for earthing with earthing test.
How to check Earthing with Megger 2020 | Grounding Testing Megger
grounding test procedure,earthing,grounding,earthing system,lightning,earth,rod,earth pit,lightning rod,protection
Subscribe to our channel: evergreenele..
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5 سال پیش
در تاریخ 1398/07/08 منتشر شده
است.
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