Operation; Introduction To Emc; Emc-Compliant Installation - Siemens SINAMICS G150 Operating Manual
Converter cabinet units 75 kw to 800 kw
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11/03
4.4
Introduction to EMC
Electromagnetic compatibility (EMC) describes the capability of an electrical device
to function satisfactorily in an electromagnetic environment without itself causing
interference unacceptable for other devices in the environment.
EMC, therefore, represents a quality standard for the following:
• Internal noise immunity: resistance against internal electrical disturbances
• External noise immunity: resistance against external electromagnetic
disturbances
• Noise emission level: environmental effects caused by electromagnetic
emissions
To ensure that the cabinet unit functions satisfactorily in the system, the
environment subject to interference must not be neglected. For this reason, special
requirements exist regarding the structure and the EMC of the system.
Operational Reliability and Noise Immunity
Measures must be taken by the converter manufacturer and the operator to ensure
the greatest possible level of operational reliability and noise immunity within the
entire system (converters, automation systems, drive motors, and so on). Only
when all of these measures have been taken are the satisfactory function of the
converter and compliance with the legal requirements (89/336/EEC) ensured.
Noise Emissions
Product standard EN 61800 - 3 specifies requirements for converters with
operating voltages less than 1000 V. Provided that the following are taken into
account, the converters meet the requirements for use in industrial applications.
4.5
EMC-Compliant Installation
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).
SINAMICS G150
Operating Manual
Electrical Installation
4-7
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