Parameter Range of val-
ues
Description
"Backup Under-
voltage Protection
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 nominal
voltage.
"Backup Under-
voltage Protection
Time U<"
0.04 ‑ 20 s Triggering time for falling below the backup
power undervoltage protection limit value.
"Backup Over-
voltage Protection
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 nominal
voltage.
"Backup Over-
voltage Protection
Time U>"
0.04 ‑ 20 s Triggering time for exceeding the backup
power overvoltage protection limit value.
"Backup Restart
Delay"
0 ‑ 600 s Is the waiting time for resumption of backup
power mode after a shutdown.
"Backup Restart
Attempts"
1 ‑ 10 Is the max. number of automatic restart at-
tempts. When the max. number of automatic
restart attempts is reached, the service mes-
sage 1177 must be acknowledged manually.
"Backup External
Frequency
Check"
(Italy only)
Off The function is deactivated
On For backup power mode (Full Backup) in Italy,
the external frequency check must be activ-
ated. Before ending backup power mode, the
grid frequency is checked. When the grid fre-
quency 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.
100
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