Connecting To The Infeed; Connecting The Motor Cables - Siemens SINAMICS S120 Manual

4.6.5.4

Connecting to the infeed

Description
The voltages provided on the auxiliary power supply system must be produced by an
auxiliary power supply (e.g. by an Auxiliary Power Supply Module or by Option K76 "Auxiliary
voltage generating unit in the Line Connection Module").
If an Auxiliary Power Supply Module is not available to supply power to the auxiliary power
supply system or if the Auxiliary Power Supply Module and the Cabinet Modules to be
supplied are installed in different parts of the cabinet line-up, an auxiliary power module in
the Line Connection Module can be used to feed power to the auxiliary power supply
system. Further alternatives for feeding power are in the first or last auxiliary power module
of the drive line-up. The maximum current-carrying capacity of the auxiliary power supply
system is 80 A. In the case of the external power supply, this must be fuse protected on the
line side.
4.6.6

Connecting the motor cables

Preparatory steps
● Install and secure the cabinet units properly.
● Disconnect the cabinet units from the power supply.
● Make sure that all the necessary safety measures have been taken at the installation
● Observe the "five safety rules".
Hazardous electrical voltage
When connecting permanently excited synchronous machines, you must ensure that the
motor has been shut down or is electrically isolated; otherwise, the voltage generated can
be lethal.
Cabinet Modules
Manual, 03/2013, A5E03263538A
location.
DANGER
Electrical installation
4.6 Connections
89