Date: 2022/03/21
Page
: 17 of 25
2.9 Inrush Current Limiter (Option)
The Power Distribution Unit provides an inrush current limiter for each phase as an option.
The inrush current limiter is designed for capacitive loads. In the moment of switching-on the
system the inrush current of the connected load will be limited for the defined time Ton.
Independent from the previous inrush level; the current limiting is always strict. After Ton
elapses the current limiting circuit of the inrush current limiter will be bypassed. Then the load
is directly connected to the AC. If an AC dump overshoots the defined time Toff, it will be
detected by the inrush current limiter. As soon as the AC recovers the inrush will be limited,
again. The inrush current limiter provides an internal temperature control. In case of a failure
the device shuts down to safely prevent from overheating or fire.
