To All
Without the Neutral Earthed resistance installed at the distribution transformer. Our 50G will have to set to the range to protects the transformer from damage when they would have an incident of Earth fault at MEA. The relay will work quickly as instantaneous zone, then trips all the distribution transformer. If the relay have been set the maximum already but still faster than the 87L (Line Differential relay of MEA). Then we will be in the big trouble in the future that the transformer will be easily tripped before the MEA to clear the fault.
For me this shall be an big issues of to claim TTCL of how to install the Neutral Earth at all the star point of distribution transformer.