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ABB and Relion are registered trademarks of the ABB Group. All other brand or product names mentioned in this document may be trademarks or registeredABB Oy assumes no responsibility for any errors that may appear in this document. © Copyright 2009 ABB Oy. All rights reserved. Trademarks. ABB and Relion are permission from ABB, and the contents thereof must not be imparted to a third party, REF615. REM615. RET615. Positive-sequence undervoltage protection. Please inquire about the terms of warranty from your nearest ABB representative. ABB Oy. Distribution Automation. P.O. Box 699. FI-65101 Vaasa, Finland. Consult ABB Oy Distribution Automation's entire Feeder Protection and Control REF615 Product Guide catalogue on DirectIndustry. Page: 1/68. permission from ABB, and the contents thereof must not be imparted to a third party, nor used for any unauthorized purpose. The software or hardware described Transformer Protection and Control 1MRS756891 B RET615 Product version: 2.0 Issued: 01.10.2009 character and absolute selectivity REF does 3. Protections ABB and Relion are registered trademarks of ABB Group. All other brand or First product from 615 series REF615 released with configurations A-D. REF615 is a dedicated feeder IED (intelligent electronic device) designed for the protection, control, measurement and supervision of utility.