Siemens SINAMICS G120 Operating Instructions Manual page 39

Note
Use an unshielded cable for the mains connection of Power Modules with integrated filter.
Power Modules, which are connected to the line supply via an external filter, require a
shielded cable between the line filter and Power Module.
Cables inside the cabinet
● All power cables of the drive (line supply cables, cables to braking resistors, as well as
● Line supply cables running between the supply system and the line filter must be routed
● Signal and data cables, as well as filtered line supply cables, may only cross non-filtered
● All cable lengths must be minimized (excessive cable lengths must be avoided).
● All cables must be routed as closely as possible to grounded housing components, such
● Signal and data cables, as well as their associated equipotential bonding cables, must
● When unshielded single-wire cables are used within a zone, the feed and return lines
● Spare wires for signal and data cables must be grounded at both ends to create an
● Signal and data cables should enter the cabinet only at one point (e.g. from below).
SINAMICS G120C frequency converter
Operating Instructions, 03/2012, FW V4.5, A5E02999804B AB
motor cables) must be routed separately from signal and data cables. The minimum
distance should be approximately 25 cm / 9.84 in. Alternatively decoupling in the cabinet
can be implemented by means of separation plates connected to the mounting plate
(back plane) with excellent electrical conductivity.
separately from non-filtered power cables (cables to braking resistors as well as motor
cables).
power cables at right angles of 90° to minimize coupled-in interference.
as mounting plates or the cabinet frame. This reduces interference radiation as well as
coupled-in interference.
always be routed in parallel and with as short a distance as possible.
must be either routed in parallel with the minimum possible distance between them, or
twisted with one another.
additional shielding effect.
Installing
4.6 Connecting the converter
37