There was a suggestion, in one of the "Cahier Technique" papers I think, to include a resistance between star point and Earth in LV systems - but with the consumer's earth solidly connected to the supply's earth electrode. The big advantage being that during an earth fault all the earthed parts remain at substantially at true earth potential (rather than some being pulled up to a substantial fraction of line voltage as happens with conventional TN and TT systems). The disadvantage is that the earth fault current is small so neither fuses nor (overcurrent type) circuit breakers can be used for providing automatic disconnection - so you need complete reliance on RCDs - which of course is incompatible with most existing consumers.
There was a suggestion, in one of the "Cahier Technique" papers I think, to include a resistance between star point and Earth in LV systems - but with the consumer's earth solidly connected to the supply's earth electrode. The big advantage being that during an earth fault all the earthed parts remain at substantially at true earth potential (rather than some being pulled up to a substantial fraction of line voltage as happens with conventional TN and TT systems). The disadvantage is that the earth fault current is small so neither fuses nor (overcurrent type) circuit breakers can be used for providing automatic disconnection - so you need complete reliance on RCDs - which of course is incompatible with most existing consumers.
