1- What is family of VSDs that can be applied for almost any application?
The ATV71 can be used for almost any application. it is the widest range offered by Schneider Electric and can be used for any standard or severe application.
The ATV71 can be used also for the applications of the ATV61. it can be connected to a pump or a fan.
but it is also important to be taken into consideration that the ATV71 may be more expensive than the ATV61.
to sum up the ATV71 can be used for all the applications of the ATV61 and the opposite of this sentence is not true.