How grounding resistance could be measured?

1.	How grounding resistance could be measured?
Answer» There are few methods, which can give approximately true value. These are described below. a. Fall of potential method: This method is applicable for small grid or sub station where induction effect of voltage is less. b. Measurement of earth resistance by 61.8% distance rule: c. Alternate – 1 of fall of potential method: This method is influenced by induction effect. d. Alternate – 2 of fall of potential method:

Answer»

There are few methods, which can give approximately true value. These are described below.

a. Fall of potential method: This method is applicable for small grid or sub station where induction effect of voltage is less.

b. Measurement of earth resistance by 61.8% distance rule:

c. Alternate – 1 of fall of potential method: This method is influenced by induction effect.

d. Alternate – 2 of fall of potential method:

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How grounding resistance could be measured?

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