Emc Compliant Design - Siemens Sinamics G120P Operating Instructions Manual

Table 4- 2
Category C1
Category C2
Category C3
Category C4
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
remove the insulating layer.
● Use unpainted, de-oiled mounting plates.
● Establish a central connection between ground and the protective conductor system
(ground).
Shield gaps
● Bridge shield gaps (at terminals, circuit breakers, contactors, and so on) with minimum
impedance and the greatest possible surface area.
Using large cross-sections
● Use underground and grounding cables with large cross-sections or, better still, with litz
wires or flexible cables.
Laying the motor supply cable separately
● The distance between the motor cable and signal cable should be > 20 cm. Do not lay
signal cables and motor cables in parallel to each other.
Laying the equipotential bonding cable
● It is recommended to lay the equipotential bonding cable parallel to the control lines with
a minimum cross-section of 16 mm
Inverter cabinet units
Operating Instructions, 12/2014, A5E32923362A
Definition of categories C1 ... C4
Definition of categories C1 ... C4
Rated voltage <1000 V; unrestricted use in the first environment.
Rated voltage for stationary drive systems <1000 V; for use in the second
environment. For use in the first environment only when sold and installed
by skilled personnel.
Rated voltage <1000 V; use in the second environment only.
Rated voltage ≥1000 V or for rated currents ≥ 400 A in complex systems in
the second environment.
.
2
Electrical installation
4.5 EMC compliant design
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