Emc Installation Guidelines; Connections And Interference Suppression; Basic Emc Rules; Electrical Installation - Siemens SINAMICS G110M Operating Instructions Manual

Installation

4.3 Electrical Installation

NOTICE
UL transient surge suppression requirements
To ensure that the electrical installation of this equipment complies with the UL
requirements for transient surge protection, the following requirement must be strictly
adhered to:
Transient surge suppression shall be installed on the line side of this equipment and shall
be rated 480 v (phase to ground), 480 v (phase to phase), suitable for overvoltage category
III and shall provide protection for a VPR maximum of 2 kv, type 1 or type 2 SPD
application.
Note
Optional 24 V PSU loss of power
The optional 24 V PSU derives power from the mains supply to the converter. Should the
mains supply be removed from the converter, the 24 V PSU will not longer provide power to
the control and communications components of the
converter.
4.3.2

EMC installation guidelines

4.3.2.1

Connections and interference suppression

All connections should be made so that they are permanent. Screwed connections on
painted or anodized metal components must be made either by means of special contact
washers, which penetrate the isolating surface and establish a metallically conductive
contact, or by removing the isolating surface on the contact points.
Contactor coils, relays and solenoid valves must have interference suppressors to reduce
high-frequency radiation when the contacts are opened (RC elements or varistors for AC
current operated coils, and freewheeling diodes for DC current-operated coils). The
interference suppressors must be connected directly on each coil.
4.3.2.2

Basic EMC rules

Measures to limit Electromagnetic Interference (EMI)
In the following list are the necessary measures that must be taken to ensure the correct
installation of the Converter within a system, which should minimize the effects of EMI.
60
Distributed converter for SIMOGEAR geared motors
Operating Instructions, 06/2016, FW V4.7.6, A5E31298649B AG