For a 230 volt single phase supply, the permissible limits are +10% and -6%.
That means your local DNO can supply you a minimum supply voltage of 216.2V and a maximum of 253V at the cutout.
The allowances for the final circuit voltage drops need to consider these factors.
Just wait until they drop it to -10%.
I proved recently to a friend that the NVR switch on his router table will operate down to 208 volts, but below this the NVR will not "latch".
The issue for him was inadequate supply to his shed with voltage drop causing problems. Luckily for him he went overhead with his supply, so uprating isn't so much work.
That means your local DNO can supply you a minimum supply voltage of 216.2V and a maximum of 253V at the cutout.
The allowances for the final circuit voltage drops need to consider these factors.
Just wait until they drop it to -10%.
I proved recently to a friend that the NVR switch on his router table will operate down to 208 volts, but below this the NVR will not "latch".
The issue for him was inadequate supply to his shed with voltage drop causing problems. Luckily for him he went overhead with his supply, so uprating isn't so much work.
