Answer / g.abobaker

earth charges is zero and by connecting the neutral pole to earth you giving the reference zero to ensure the value zero to the neutral pole , other wise fluctuation would happen and voltage difference will be exist between neutral and earth which will effect the performance and safety issues it the load side

Answer / anand

transformer nuetral is connected to earth to discharge the unbalanced current in the circuit.
Ct's secondary side also earthed to discharge secondary voltage and current to avoid flashing.

Answer / k.prakashchandra

Neutral is connected to earth to make available everywhere in the earth . CT secondary is earthed to remove the presence of primary voltage in the secondary due to capacitance between primary and secondary

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