So with a TN-C-S supply we would likely lose the earth at the same time as we lose the neutral. So does the FE need to be independent of the DNO earth?Schneider Electric Australia wrote:What is the purpose of Functional Earth (FE) on Acti9 iC60 RCBO?
If there is a break in the neutral, the product is supplied by redundancy via the FE (Line to FE supply instead of Line to Neutral), allowing it to continue to perform its protection function.
This configuration allows the behavior of Voltage Dependent (VD) RCDs with FE to be compared with that of Voltage Independent (VI) RCDs.
