Siemens SIMOTICS T-1FW68, Configuration Manual

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Electrical connection
8.1 Permissible line system types
1FW68 radial segment motors
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Configuration Manual, 08/2021, A5E51132930B AA
8.1 Permissible line system types
Permissible line system types and voltages
The following table shows the permissible TN line supply system voltages for the stator
segments.
Table 8- 1 Permissible line voltages of TN line supply systems, resulting DC link voltages and
converter output voltages
Permissible
line supply voltage
Resulting
DC link voltage U
DC
Converter output voltage
(rms value) U
a max
400 V 600 V (controlled) 425 V (controlled)
480 V 720 V (controlled) 510 V (controlled)
When using the SINAMICS S120 drive system, the stator segments are always certified
for operation on the following line supplies:
• TN line supply systems with grounded neutral point
• TN line supply systems with grounded neutral point
• IT line supply systems
When operated on IT line supply systems, a protective device must be installed 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 avoids the winding insulation being inadmissibly stressed.
8.2 Motor circuit diagram
The circuit diagram of a stator segment looks like this:
Figure 8-1 Circuit diagram of a stator segment