Kaco blueplanet 29.0TL3 Serie Manual página 76

10 | Specifications
– The number of parallel inverters does not affect the reliability of this function.
– This method also ensures that the impact on the distribution grid is kept to a minimum.
– In normal operation no effects on harmonic content, flicker and grid stability are detected.
This detection method is combined with a two stage passive rate of change of frequency (ROCOF) ob-
servation. If the ROCOF of the grid exceeds the configured disconnection threshold (stage 1) for the
configured disconnection time, the device switches to zero current mode. If the ROCOF of the grid ex-
ceeds the configured shutdown threshold (stage 2) for the configured shutdown time, the device shuts
down. In case of an island, this will shut down the island instantaneously. If the grid stabilizes, what
might be the case if the ROCOF event was due to a short disturbance in the power grid, the inverter
will resume normal operation. In the event of active stage 1, the device switches to zero current mode,
and re-starts the infeed after a few 100ms. At stage 2, the device has shut down and the set recon-
nection conditions apply.
Página 76
Manual
Kaco blueplanet 29.0TL3