V7.00
24905_EDEBD
A0272-5019-1_EN
64
System operation
System operation
Mode P
3
φ (change by active power curve):
With the setting P
3
φ (change by active power curve), the target cos-phi is determined
by means of 10 configurable control points (total active power determined through the
main current transformer by three-phase projection). The parameters refer to Pn (rated or
maximum active power).
Cos-phi2 (power recovery) has no function in this mode.
A hysteresis can be programmed using the “hyst.” parameter.
The transition to the new target cos-phi can be attenuated using the “t-delay” parameter.
New values are adopted once per second.
Example 1: Settings:
Mode P
3
φ
Cosphi1 1.0
Power consumption
P rated=Pmax.
150kW (=100%)/for power recovery systems -150kW
t-delay
000 seconds
Hysteresis
8% (= 12kW, +/- 6kW)
Point 1
P= 46%
cosφ = 0.95 cap.
Point 2
P= 66%
cosφ = 1.0.
Point 3
P= 86%
cosφ = 0.95 ind.
Point 4
P= 100%
cosφ = 0.95 ind.
NOTE
Points 5 to Point 10 are no longer taken into account
since point 4 already has the maximum of 100%.
Function:
In the event of a change in the active power in the 69 kW to 129 kW range, the target
cos-phi will change from 0.95 capacitive to 0.95 inductive. In the event of instantaneous
power of approx. 100 kW, the target cos-phi is 1.0.
Outside the curve (e.g. below 10% P+ or over 100% P+) the target cos-phi 1.0.