Permissible Line System Types - Siemens Simotics T-1FW6 Configuration Manual

Electrical connection

8.1 Permissible line system types

8.1 Permissible line system types
Permissible line system types and voltages
The following table shows the permissible line voltages of TN line supply systems for the
motors.
Table 8- 1
Permissible line
supply voltage
400 V
480 V
When using the SINAMICS S120 drive system, the motors are always approved for
operation on the following line supplies:
• TN line systems with grounded neutral point
• TT line systems with grounded neutral point
• IT line systems
When operated on IT line systems, a protective device should be provided that switches off
the drive system in the case of a ground fault.
In operation with a grounded external conductor, an isolating transformer with grounded
neutral (secondary side) must be connected between the line supply and the drive system.
This protects the winding insulation from excessive stress.
144
Permissible line voltages of TN line supply systems, resulting DC link voltages and
converter output voltages
Resulting DC link voltage U
600 V (controlled)
528 V (uncontrolled)
634 V (uncontrolled)
Converter output voltage (rms value)
DC
U
a max
425 V (controlled)
380 V (uncontrolled)
460 V (uncontrolled)
1FW6 external rotor built-in torque motors
Configuration Manual, 12/2020, A5E50516483B AA