Can MDGF be combined with ZSI when Ground Fault Alarm is selected using breakers with micrologic 5.0P or H or 5.0x LSI?

No .When GF alarm is selected in a double or multiple ended substation and when tie or ties breakers are present, short time function must be self restrained and since GF protection is not available in the trip unit . ZSI option must be deselected.

Released for:Schneider Electric USA