(19-08-2019, 11:51 AM)ppppenguin Wrote: Terry, that patent is for an ordinary current operated ELCB or RCD are they are now known. An RCBO includes both an RCD and a MCB so it can protect against overcurrent and earth leakage.
I'm well aware of that, Jeffrey, but it is the RCD element which is important here. It matters not if the MCB is included or separate. It's different in a consumer unit where taking up two positions would be a bit restrictive (assuming we want individual circuit protection).
