Fronius GEN24 User Manual

RoCoF detection can be used as a passive stand-alone operation detection meth-
od.
Parameter Description
"Rate of Change of Fre-
quency (RoCoF) Protec-
tion."
Activate and deactivate the RoCoF protection.
"On" / "Off
"ROCOF Limit" Setting value of the frequency change protection in
[Hz/s]
"RoCoF Time" Setting value of time for the RoCoF protection in [s]
DC Injection DC injection means the injection of an AC current into the public grid that is un-
intentionally contaminated with a DC component. This DC component causes a
shift of the pure AC current on the Y-axis (offset).
Due to the way the inverter works, no DC injection takes place in normal opera-
tion. However, in order to be protected against faults or inaccuracies, many con-
nection rules require monitoring of the DC injection and shutdown if limit values
are exceeded.
Internal and external limits can be defined for the limit values. Inner limits have
tighter limits and longer protection times by default, outer limits have broader
limits and shorter protection times, so that shutdown occurs more quickly with
higher DC components. For both limit values there is a protection time which
defines the maximum overshoot duration.
"Inner Limit"
Parameter Range of val-
ues
Description
"Mode" Off Monitoring of the inner limit is deactiv-
ated.
Absolute DC component monitoring with an abso-
lute current limit in [A].
Relative DC component monitoring with a relative
current limit in [%] referred to the nominal
current of the inverter.
"DC Current
Absolute Value"
0.0 A ‑ 10.0 A Absolute DC current limit in [A] - If the
DC component of the injected AC current
exceeds this limit for the duration defined
with "DC Injection Time", feeding energy
into the grid is interrupted with status
code 1052.
This limit only applies to the "Absolute"
mode.
"DC Current
Relative Value"
0.0 % ‑ 10.0 % Relative DC current limit in [%] referred to
the nominal current of the inverter - If the
relative DC component of the injected AC
current exceeds this limit for the duration
defined with "DC Injection Time", feeding
energy into the grid is interrupted with
status code 1052.
This limit only applies to the "Relative"
mode.
27
EN

Fronius GEN24 Specifications

General

Type	Hybrid Inverter
Power Range	3.0 kW to 10.0 kW
Max. DC input voltage	1000 V
Number of MPP Trackers	2
Operating Temperature Range	-25°C to +60°C
Efficiency	98.2%
MPPT voltage range	200 - 800 V
Interfaces	Wi-Fi / Ethernet / USB / RS485
Warranty	5 years (extendable)
Cooling	Active cooling