Siemens SINAMICS G130 - EMC-Compliant Design

Electrical installation
4.5 EMC-compliant design
Inverter chassis units
Operating Instructions, 07/2016, A5E00331449A
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Table 4- 2 Definition of categories C1 ... C4
Definition of categories C1 ... C4
Category C1
Rated voltage <1000 V; unrestricted use in the first environment.
Category C2 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.
Category C3
Rated voltage <1000 V; use in the second environment only.
Category C4 Rated voltage ≥1000 V or for rated currents ≥ 400 A in complex systems in
the second environment.
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
2
.