Emc-Compliant Design - Siemens SINAMICS S150 Operating Instructions Manual

Electrical installation

4.5 EMC-compliant design

4.5 EMC-compliant design
The following section provides some basic information and guidelines that will help you
comply with the EMC and CE guidelines.
cabinet assembly
● Connect painted or anodized metal components using toothed self-locking screws or
● Use unpainted, de-oiled mounting plates.
● Establish a central connection between ground and the protective conductor system
Shield gaps
● Bridge shield gaps (at terminals, circuit-breakers, contactors, and so on) with minimum
Using large cross-sections
● Use underground and grounding cables with large cross-sections or, better still, with litz
Laying the motor supply cable separately
● The distance between the motor supply cable and signal cable should be > 20 cm. Do not
Securing the potential to ground between modules with widely differing interference potential
● Lay an equalizing cable parallel to the control cable (the cable cross-section must be at
● If relays, contactors, and inductive or capacitive loads are connected, the switching relays
Cable installation
● Cables that are subject to or sensitive to interference should be laid as far apart from
● Noise immunity increases when the cables are laid close to the ground potential. For this
● Ground the spare cables on at least one end.
● Long cables should be shortened or laid in noise resistant areas to avoid additional
50
remove the insulating layer.
(ground).
impedance and the greatest possible surface area.
wires or flexible cables.
lay power cables and motor supply cables in parallel to each other.
least 16 mm²).
or contactors must be provided with anti-interference elements.
each other as possible.
reason, you are advised to lay these cables in corners and at ground potential.
connecting points.
Drive converter cabinet units
Operating Instructions, 07/07, A5E00288214A