Connecting and starting work with the inverter

2.1. On your frequency converter with a single-phase power supply of ~220V, it is specifically indicated on the terminals where to connect the phase and where the zero. Does it have to be followed?

Will work for any connection. But in the event of an emergency shorting of current-carrying parts on the body, the correct connection increases the reliability of the protection operation. Of course, the input machine in front of the frequency converter must be in the phase circuit, this is not discussed!

2.2. What cross-section of wires should be at the entrance to the frequency converter and at the exit from it?

The rules are the same as for any other wiring. Approximately 6...10A/sq.mm for copper wire with polyvinyl chloride insulation. Practically, this means that for all frequency converters CFM210 and CFM310, which are currently produced, a three-wire copper cable 3x2.5 sq.mm is enough, for CFM110 3x1 sq.mm. If the length of the route exceeds 30 meters, it is desirable to increase the cross section of the loss reduction cable.

2.3. Your frequency converters with a three-phase power supply of ~380V have four input terminals, 3 phases and a neutral. Is it necessary to connect the neutral? Is it necessary to follow the order of phases indicated on the terminals?

Will work without neutral. But the effectiveness of the input jamming filter will be significantly reduced. The order of the input phases does not matter.