Siemens Sinamics S120 Manual page 138

Line connection and line-side power components
3.11 Line connection variants
Note
Permissible line supplies
In combination with the drive system, the motors are generally approved for operation on TN
and TT systems with grounded neutral point and on IT systems.
Fire hazard for the motor due to overload of the insulation
There is higher stress on the motor insulation through a ground fault in an IT system or
grounded line the conductor.
TT line supply systems generally have a grounded line conductor.
A possible result is the failure of the insulation with a risk for personnel as a result of smoke
and fire.
• For IT line supplies, use a monitoring device that signals an insulation fault.
• Correct the fault as quickly as possible in IT systems so the motor insulation is not
• For line supplies with grounded line conductor, use an isolating transformer with
NOTICE
Destruction of the motor when directly connected to the three-phase line supply
The motor will be destroyed if it directly connected to the three-phase line supply.
• Connect the motor according to the circuit diagram provided (see the connection
138
WARNING
overloaded.
grounded neutral point (on the secondary) between the line supply and the drive
system.
examples for the Motor Module).
Booksize Power Units
Manual, (GH2), 04/2014, 6SL3097-4AC00-0BP6