Also, would it be to much to ask for a pic of the table regarding distributed and none distributed neutrals?
The problem is after the 1st fault you might have 133V to earth (if N-E faulted) or you might have 230V to earth (if either of L1-L3 are faulted).So basically TN vs IT? I can't picture at 133/230Y TN system needing the same disconection time as 230 volt IT. Both are none distributed neutral systems.
Right, but picture a 133/230Y TN system. Highest voltage to earth will be 133 volts no matter the network conditions.
Reply to the thread, titled "Disconnection Time for IT system" which is posted in UK Electrical Forum on Electricians Forums.