Answer / Arpit

The impedance of a DG set (Distributed Generation) depends on various factors, including the generator type, transformer rating, cable length, and load characteristics. A typical value for impedance in a DG set can range from 5% to 10%. The exact impedance may vary depending on specific system configurations.

To calculate the earthing conductor size for a DG set, you need to consider factors like the fault level, earth resistance, and safety margins. You can use formulae such as Berg Formula or Mega-ohm meter method to estimate the earth resistance and then determine the required earthing conductor size based on safety standards and guidelines.

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