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It is recommended that the user of REL 301/302 equipment become acquainted with the information in this in-
struction leaflet and in I.L. 40-386.1 before energizing the system. Failure to do so may result in injury to per-
sonnel or damage to the equipment, and may affect the equipment warranty. If the REL 301/302 relay system
is mounted in a cabinet, the cabinet must be bolted to the floor, or otherwise secured before REL 301/302 in-
stallation, to prevent the system from tipping over.
All integrated circuits used on the modules are sensitive to and can be damaged by the discharge of static elec-
tricity. Electrostatic discharge precautions should be observed when handling modules or individual
components.
ABB does not assume liability arising out of the application or use of any product or circuit described herein.
ABB reserves the right to make changes to any products herein to improve reliability, function or design. Spec-
ifications and information herein are subject to change without notice. All possible contingencies which may
arise during installation, operation, or maintenance, and all details and variations of this equipment do not pur-
port to be covered by these instructions. If further information is desired by purchaser regarding a particular in-
stallation, operation or maintenance of equipment, the local ABB representative should be contacted.
Trademarks
All terms mentioned in this book that are known to be trademarks or service marks are listed below. In addition,
terms suspected of being trademarks or service marks have been appropriately capitalized. ABB Power T&D
Company Inc. cannot attest to the accuracy of this information. Use of a term in this book should not be regarded
as affecting the validity of any trademark or service mark.
IBM and PC are registered trademarks of the International Business Machines Corporation
WRELCOM is the registered trademark of the ABB Power T&D Company Inc.
INCOM is the registered trademark of the Westinghouse Electric Corporation
Copyright © ASEA BROWN BOVERI, ABB Power T&D Company Inc. 1993, 1994, 1995, 1996, 1997
This document contains information that is protected by copyright. All rights are reserved. Reproduction, adaptation, or
translation without prior written permission is prohibited, except as allowed under the copyright laws.
ABB does not convey any license under its patent rights nor the rights of others.
!
CAUTION
i
I.L. 40-386.12
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