Rockwell Automation Low-Voltage Switchgear and Controlgear - Manual (Page 3)

Disclaimer
The present document is designed to provide general technical information about the selection
and application of low-voltage switching and control devices and does not claim to provide a
comprehensive or conclusive presentation of the considered material. Errors or changes – for
example as a consequence of changed standards or technical progress – cannot be excluded.
This documentation has been worked out with utmost diligence. Nevertheless the authors and
Rockwell Automation do not warrant the correctness of the contents and recommendations and
cannot exclude typing errors. Claims on the authors or Rockwell Automation based on this
documentation cannot be accepted. Rockwell Automation reserves the right to make changes at
any time and at its own discretion. Correspondingly, qualified professional advice should be
obtained before making decisions and initiating activities that could have an effect on technical
equipment.
The authors thank the International Electrotechnical Commission (IEC) for permission to
reproduce information from its International Standard:
IEC 60947-1 ed.5.0 (2007) / IEC 60947-4-1 Am2 (2005) / IEC 60947-2 ed.4.0 (2006) / IEC
60269-1 ed.4.0 (2006) / IEC 60947-8 ed.1.1 (2006) / IEC 60947-5-1 ed.3.0 (2003 ) / IEC 60038
ed.6.2 (2002) / IEC 60079-14 ed.4.0 (2007).
All such extracts are copyright of IEC, Geneva, Switzerland. All rights reserved. Further
information on the IEC is available from www.iec.ch. IEC has no responsibility for the placement
and context in which the extracts and contents are reproduced by the authors, nor is IEC in any
way responsible for the other content or accuracy therein.
Rockwell Automation would like to thank the authors of the present document and their assis-
tants for their valuable contributions.
Authors:
Dr. Werner Breer, Paul Hug, Urs Hunziker, Rey Kaltenrieder, Heinz Unterweger,
Dr. Hans Weichert
With the inclusion of other specialists
Copyright © 2009 by Rockwell Automation, Milwaukee, USA
LVSAM-WP001A-EN-P - April 2009 0-3