Fronius GEN24 Operating Instructions Manual page 67

Parameter Range of val-
ues
0 % ‑ 100 %
"Lock-Out P-
Dependent (%
of Nominal Ap-
parent Power)"
0.01 s ‑ 60 s
"Time Constant
(τ)"
Q(P) - Power dependent Reactive Power Characteristic
This function controls the reactive power depending on the momentary effective
power according to a characteristic curve. The characteristic curve is defined by
four data points (1‑2‑3‑4). If fewer data points are required, the identical para-
meters can be set for two points. The function is limited by the maximum appar-
Description
Effective power in
percent [%] related
to the nominal ap-
parent power S . If
N
this value is under-
shot, the Cos φ(P)
characteristic is de-
activated.
Time constant (1
Tau) in seconds [s].
Whenever the set
value is changed,
this new set value is
not triggered ab-
ruptly, but smoothly
in accordance with a
PT1 response. The
time constant de-
scribes how quickly
the new set value is
reached. (After three
time constants the
final value 95 % is
reached)
Supplementary de-
scription
With the effective
power-dependent
lock-out values, it
can be set that the
cos φ(P) control is
deactivated for small
effective powers.
For characteristic
curves with a cos φ
not equal to 1 at
data point 1, a cos φ
of 1 is approached
again when the ef-
fective power value
falls below this
value. Otherwise, for
effective powers
that are lower than
defined in data point
1, the cos φ belong-
ing to data point 1
remains active.
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