Inverter Active Power Setting : Over-Frequency Curve - Kaco blueplanet 25.0 NX3 M3 Manual

2.2.9 Inverter active power setting : over-frequency curve

The inverter may be capable of activating active power response to over-frequency at a programmable frequency threshold
with a programmable droop. There are four mode can be chosen here.
Fix gradient and non-hysteresis: ∆P is the active power as a percentage of Pn, the inverter provide non-hysteresis in the
control of active power response to over-frequency.
Fix gradient and hysteresis: ∆P is the active power as a percentage of Pn, the inverter provide hysteresis in the control of
active power response to over-frequency.
Variable gradient and non-hysteresis: ∆P is the active power as a percentage of PM, the inverter provide non-hysteresis in
the control of active power response to over-frequency.
Variable gradient and hysteresis: ∆P is the active power as a percentage of PM, the inverter provide hysteresis in the
control of active power response to over-frequency.
The below figure descripts the difference between hysteresis and non-hysteresis control
Here,
fn: The rated frequency
freset: Reset frequency
fstart: Starting frequency
fstop: Stopping frequency
∆P : Active power in percentage during reducing
Intentional delay time for P(f) is only active for the activation of the function after the frequency over fstart, and the
intentional delay time plus inherent dead time shall be less than 2s
Min. delay time for active power release is the delay time that the active power can increase after the frequency below
freset.
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