Fronius Primo GEN24, Operating Instructions Manual

Page: 22 / 76

and frequency must be fulfilled for a certain time.
A distinction is made between:
- "Startup": switching on the inverter during a normal startup process (e. g. at
sunrise) and
- "Reconnection": the reconnection of the inverter after a grid fault (see table
"Grid faults") (e. g. if a fault occurs in the AC grid during the day which
causes the inverter to disconnect).
Which limit values are used when checking the connection conditions depends
on whether a mains fault has occurred and which "Mode" is defined. The "Mode"
only influences the limit values and not the monitoring time. The monitoring time
is determined by the parameters described in "General" / "Startup and Recon-
nection". The monitoring time used depends on whether it is "Startup" or "Recon-
nection" and applies equally to frequency and voltage limits. After the grid mon-
itoring has expired, the previously mentioned "Interface Protection" values are
active. In backup power mode these "Startup and Reconnection" parameters are
not active.
Parameter Description
"Mode" The following modes are available:
- "Startup Values are used for Startup / Recon-
nection Values are used for Reconnection": In
a normal startup process, the startup values
are used as connection conditions. When re-
connecting after a mains fault, the reconnec-
tion values are used as connection conditions.
- "Startup Values are used for Startup and Re-
connection": Regardless of the type of connec-
tion, the startup values are always used as con-
nection conditions.
"Reconnection Minimum
Voltage" Lower value of the voltage for reconnection in [V]
"Reconnection Maxim-
um Voltage" Upper value of the voltage for reconnection in [V]
"Startup Minimum
Voltage" Lower value of the voltage for the normal start pro-
cess in [V]
"Startup Maximum
Voltage" Upper value of the voltage for the normal start pro-
cess in [V]
The following errors are defined by the inverter as grid errors for this function-
ality:
Name Description "StateCode"
name "StateCode"
number
"Overvoltage" Mains voltage exceeds an
overvoltage limit ("Inner,
Middle, or Outer Limit
Overvoltage"). "AC voltage
too high" 1114
"Undervoltage" Mains voltage falls below
an undervoltage limit ("In-
ner, Middle or Outer Limit
Undervoltage"). "AC voltage
too low" 1119
22