Thanks Mike. Indeed a tap change of 2.5% or even 5% is not going to be felt much by the installation and as you already mentioned the impedance will be dominated by the cables at some point. Its just i wanted to have the answer of the question lands from the client.
Andy, I am cautious as the transformer is private with the closest DB like 15m from the main switchboard. A bump on the 11kV like 6% which is i believe within the DNO fluctuation limits results at a 456V LL which is pretty high. This is a good 14% over 400V.
Thanks Mike. Indeed a tap change of 2.5% or even 5% is not going to be felt much by the installation and as you already mentioned the impedance will be dominated by the cables at some point. Its just i wanted to have the answer of the question lands from the client.
Andy, I am cautious as the transformer is private with the closest DB like 15m from the main switchboard. A bump on the 11kV like 6% which is i believe within the DNO fluctuation limits results at a 456V LL which is pretty high. This is a good 14% over 400V.
