Substation is fundamentally called instrument power station and we need this on the grounds that our transmission line voltage is 132kv without changing over this high voltage we can’t utilize the voltage to our household purposes. This change is vital for customer wellbeing. We have utilize 230V or 400V in our residential purposes. On the off chance that we have utilize 132kv or 230kv line in our household region it will be destructive for the buyer. That is the reason we need a substation where we can lessen the high voltage to low voltage in light of the fact that the hazard will turn out to be less.