V7.00
24905_EDEBD
A0272-5019-1_EN
71
System operation
System operation
Mode U
3
Q/P rated (change by voltage curve):
With the setting U
3
Q (change by voltage curve), the Q/Pn value is determined by means
of a configurable curve. The voltage is measured either at the basic module or at the
multimess D4 additional module. The parameters refer to P rated (rated active power
of the power plant). With a measured input to the basic module of UPh-N = 230 V,
the measured voltage is projected to a rated voltage (Un) of 400 V Ph-Ph.
The Q/Pn2 value (power recovery) has no function in this mode.
The Q/Pn1 value (power consumption) is used for the baseline between the adaption
ramps.
A hysteresis can be programmed using the “hyst.” parameter.
The transition to the new Q/Pn value can be attenuated using the “t-delay” parameter.
New values are adopted once per second.
NOTE
When connecting a multimess D4 additional module, the measuring voltage of this
module is automatically evaluated (three-phase measurement). The crucial factor is the
greatest measured voltage UPh-Ph.
Example settings:
Q/Pn1 0.00
Power consumption
P rated
150kW
Mode U
3
Q
t-delay
000 seconds
Q/Pn A (bottom)
0.33 cap.
from 90%
to 95%
Q/Pn B (top)
0.33 ind.
from 105%
to 110%
U rated 400V Ph-Ph
Hysteresis
2.50% (=10V Ph-Ph)
Function:
In the event of a change in the measuring voltage in the 360 V to 440 V Ph-Ph range, the
Q/Pn value will change from 0.33 capacitive to 0.33 inductive.