Parameter Value range Description
"Backup Under-
voltage Protec-
tion Limit U<
[pu]"
0 ‑ 2%V The setting value is used to set the limit
value for switching off backup power
mode,
e. g. setting value 0.9 = 90% of the nomin-
al voltage.
"Backup Under-
voltage Protec-
tion Time U<"
0.04 ‑ 20 s Triggering time for falling below the
backup power undervoltage protection
limit value.
"Backup Over-
voltage Protec-
tion Limit U>
[pu]"
0 ‑ 2%V The setting value is used to set the limit
value for switching off backup power
mode,
e. g. setting value 1.1 = 110% of the nom-
inal voltage.
"Backup Over-
voltage Protec-
tion Time U>"
0.04 ‑ 20 s Triggering time for exceeding the backup
power overvoltage protection limit value.
"Backup Re-
start Delay"
0 ‑ 600 s Is the waiting time for resumption of
backup power mode after a shutdown.
"Backup Re-
start Attempts"
1 ‑ 10 Is the max. number of automatic restart
attempts. When the max. number of auto-
matic restart attempts is reached, the ser-
vice message 1177 must be acknowledged
manually.
"Backup Ex-
ternal Fre-
quency Check"
(Italy only)
Off The function is deactivated
On For backup power mode (Full Backup) in
Italy, the external frequency check must
be activated. Before ending backup power
mode, the grid frequency is checked.
When the grid frequency is in the allowed
limit range, the loads are connected to the
public grid.
"Backup Short
Circuit Trip
Time"
0.001 ‑ 60 s If a short circuit occurs in backup power
mode, this mode is interrupted within the
set time.
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