What is the procedure for filling oil in a transformer tank?

The procedure for filling oil in a transformer tank involves several key steps. First, ensure the transformer is de-energized and properly grounded. Next, connect the oil filling apparatus to the designated filling port. Carefully monitor the oil level during the filling process to avoid overfilling. It is crucial to filter the oil to remove impurities before filling. Finally, check for leaks and ensure all connections are secure after the filling is complete.