Potential Concept; Electrical Requirements; Table 6-1 Dimensioning Cables - Siemens SINAMICS SM150 Operating And Installation Instructions

Electrical connection

6.3 Potential concept

I/O connection
● Create a low-impedance ground connection for additional cabinets, system components,
● Ground unused lines at one end in the cabinet.
● Choose the greatest possible clearance between the power and signal cables (at least 20
● Avoid unnecessarily long cable loops.
● Surge suppressors, e.g. RC elements or varistors must be connected to the operating coils
● In order to reduce noise/interference entering or exiting via the cable, filter auxiliary voltages
6.3 Potential concept
A noise-free connection between the internal and external supply voltage can be achieved by
connecting the 0 V potentials to each other and grounding them. This also eliminates the need
for the control circuit insulation monitor required by DIN EN 60204-1.
Figure 6-3
6.4

Electrical requirements

Table 6-1
Object
Cable length (motor side)
Cable length (line side)
112
and distributed devices with the largest possible cross-section (at least 16 mm²).
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.
for contactors and relays in the converter.
in the control cabinet.
Potential concept
Dimensioning cables
Length
50 m with one or two parallel ca‐
bles;
Cables must be shielded
200 m with output reactor (option
L08)
70 m
Capacitance per unit length max.
0.45 µF/km
SINAMICS SM150 6SL3845-7NN46-7AA0
Operating Instructions 04/2017