Siemens SINAMICS G130 Engineering Manual page 233

V
Line
t
Transformer
Z
Line
Interference current route when a shielded motor cable is used in combination with an EMC filter in the converter
To achieve the intended reduction in interference, it is essential to install the entire drive system correctly. The
installation must be such that the interference current I
interruptions or weak points from the shield of the motor cable to the PE or EMC shield busbar and the line filter back
to the inverter.
Compliance with categories C2 and C3 of EMC product standard EN 61800-3 therefore requires the use of a
shielded cable to make the connection between converter and motor. For high power outputs in the power range of
SINAMICS Chassis and cabinet units, a symmetrical, three-core, three-phase cable should be used whenever
possible.
Shielded cables with symmetrically arranged three-phase conductors L1, L2 and L3 and an integrated, 3-wire,
symmetrically arranged PE conductor, such as the PROTOFLEX EMV-FC, type 2XSLCY-J 0.6/1 kV illustrated below
which is supplied by Prysmian, are ideal.
Shielded, symmetrically arranged three-phase cable with 3-wire PE conductor
Alternatively, it is also possible to use a shielded cable containing only three-phase conductors L1, L2 and L3 in a
symmetrical arrangement, for example, 3-wire cables of type Protodur NYCWY. In this case, the PE conductor must
be routed separately as close as possible and in parallel to the 3-wire motor cable.
For outputs in the Booksize and Blocksize unit power range, and for lower outputs in the Chassis and cabinet unit
power range, it is also possible to use shielded, asymmetrical, 4-wire cables (L1, L2, L3 plus PE) such as power
cables of type MOTION-CONNECT.
L1
PE PE
L2 L3
PE
ideal symmetrical 3-wire cable plus
symmetrically arranged PE conductor
Shielded three-phase cables with concentric shield
Converter cabinet unit
Chassis unit
Line filter
category C3
PE busbar or EMC shield busbar in the converter cabinet unit
L2
symmetrical 3-wire cable with
separately routed PE conductor
EMC Installation Guideline
IGBT inverter
I
l
Z
Ground
can find a continuous, low-inductance path without
I
L1
L3
PE
asymmetrical 4-wire cable
including the PE conductor
SINAMICS Engineering Manual – November 2015
Engineering Information
Motor cable
C C
P
I
l
t
L2 L1
L3 PE
233/528
Ó Siemens AG
Motor
P