User Manual Chapter 1 - Safety Precautions 9
1.1 Power and ground connections
1) TDE Macno S.P.A. drives are designed for use with standard three phase mains power supplies, symmetrical with
respect to ground (TN or TT mains supplies).
Single phase drives must be connected to one phase, neutral and ground. Three phase drives must be connected
to all three phases plus ground.
2) In the case of an IT mains supply, use a star/delta transformer with secondary wiring referenced to ground.
If IT mains power is used, loss of insulation in onen of the other devices connected to the same circuit
can cause the drive to malfunction if no star/delta transformer is provided.
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