Siemens SINAMICS G120 Hardware Installation Manual page 12

Safety notes
Electrical installation
Warning
Power and motor connections
The SINAMICS G120 inverter must always be grounded. If the SINAMICS G120 inverter is
not grounded correctly, extremely dangerous conditions may arise which could prove
potentially fatal.
Isolate the mains electrical supply before making or changing connections to the unit.
Ensure that the SINAMICS G120 inverter is configured for the correct supply voltage – the
SINAMICS G120 inverter must not be connected to a higher voltage supply.
When synchronous motors are connected or when coupling several motors in parallel, the
SINAMICS G120 inverter must be operated with V/f control characteristics (P1300 = 0, 2 or
3).
Note
TT-/IT power systems can only be used with unfiltered drives.
Caution
Cables
The control cables must be laid separately from the power cables. The connection must be
carried out as shown in the installation section in this manual, to prevent inductive and
capacitive interference from affecting the correct function of the system.
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Hardware Installation Manual, 2006-04-04, A5E00807525B AA
Power Modules PM240