Connection; Preparations For Connecting The Power Cables - Siemens SINAMICS S120 Operating Instructions Manual

Electrical connection

5.3 Connection

I/O interfacing
● Create a low-impedance ground connection for additional cabinets, system components,
and distributed devices with the largest possible cross-section (at least 16 mm²).
● Ground unused lines at one end in the cabinet.
● Choose the greatest possible clearance between the power and signal cables (at least 20
cm). The greater the distance over which the cables are routed in parallel, the greater the
clearance must be. You must install additional shields if sufficient clearance cannot be
maintained.
● Avoid unnecessarily long cable loops.
● The operating coils for contactors and relays in the drive must be connected to overvoltage
limiters (e.g. RC elements or varistors).
● In order to reduce noise/interference entering or exiting via the cable, filter auxiliary voltages
in the control cabinet.
5.3 Connection
5.3.1

Preparations for connecting the power cables

● Disconnect the cabinets from the power supply.
● Ensure that all the necessary safety measures have been taken at the installation location.
● Allow unimpeded access to the cable clamping bar in the cabinets.
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Applications for Cabinet Modules, liquid cooled
Operating Instructions, 04/2015, A5E35974555A