What is standard of electrical cable for 220KVA transformer?

The standard electrical cable size for a 220 kVA transformer typically depends on factors such as the type of insulation, installation conditions, and ambient temperature. Generally, for a three-phase transformer, a commonly used cable size might be around 50 mm² to 95 mm² copper conductors, or larger if considering longer distances or higher temperature ratings. It is essential to consult local electrical codes and perform load calculations to ensure compliance and safety. Additionally, proper protection devices should be included in the installation to prevent overload and short circuits.