Flying Loads - Danfoss VLT Pocket Manual

Flying Loads: Are soft starters suitable for use
with a fl ying load?
Soft starters can be used with fl ying loads (motors that are already
rotating), without any special wiring or confi guration.
As a general rule, the faster the motor is rotating in the forward
direction, the shorter the start time will be.
If the motor is rotating in the reverse direction, it will be slowed to
a standstill before accelerating in the forward direction. In this case
allow for the extended start time when rating the soft starter.
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20 VLT Soft Starter Pocket Guide