what are the methods of neutral earthing in power transformers?

Neutral earthing in power transformers can be achieved through several methods, including solid earthing, resistance earthing, and reactance earthing. Solid earthing connects the neutral directly to the ground, providing a low-resistance path for fault currents. Resistance earthing limits fault current by incorporating a resistor in the neutral connection. Reactance earthing uses inductors to limit fault currents while allowing normal operation. Each method has its advantages and is chosen based on system requirements and safety considerations.