WOW!!! Where in the world is industry going with buzz words.
GFI-------ground fault interrupt.............which most everybody understands
ELCI------equipment leakage current interrupter
RCD------residual current device
RCBO----residual current breaker with overload protection
CRAZY!!!! All variations of a GFI. Wait awhile, somebody is sure to respond with something such as: "no sir, you don't understand. The benefits provided by the C$%B apply only to ....." Again---crazy