Frequency Limit Values - Fronius SnapINverter Serviceanleitung

U Outer Limit Min
Lower outer grid voltage limit value in V
U OL Min Trip Time
Trip time
U Reconnect max
Upper voltage limit value for reconnection to the public grid following disconnection due
to unauthorised parameter deviation
[V]
U Reconnect min
Lower voltage limit value for reconnection to the public grid following disconnection due
to unauthorised parameter deviation
[V]
U Longtime Limit
Voltage limit value in V for the 10 minute average voltage value
A)
B)
Frequency limit
values
Graphic illustrating the limits
Freq. Inner Limit Max
Upper inner grid frequency limit value in Hz
Freq IL Max TripTime
Trip time
Freq. Inner Limit Min
Lower inner grid frequency limit value in Hz
Freq IL Min TripTime
Trip time
Alt Freq Mode
For activating / deactivating alternative frequency limit values
ON / OFF
70
A)
for falling below the lower outer grid voltage limit value in cyl
Different trip times can be assigned to the inner limit value IL and outer limit value
OL.
For example: short trip time for a deviation from the outer limit value
long trip time for a deviation from the inner limit value
cyl = grid periods (cycles); 1 cyl corresponds to 20 ms at 50 Hz or 16.66 ms at 60
Hz
U / f
n n
(1)
OL
IL
t
OL Ox/Ux
t
IL Ox
IL
OL
(1)
U / f
n n
A)
for exceeding the upper inner grid frequency limit value in cyl
A)
for falling below the lower inner grid frequency limit value in cyl
IL
OL
(1)
t
IL Ux
t [s]
B)
"Inner limit" - inner limit value
"Outer limit" - outer limit value
Trip range
B)
B)