Contents1. Application..................................................................... 32. Available functions..........................................................53. Current protection........................................................ 124. Voltage protection........................................................ 135. Multipurpose protection................................................136. Secondary system supervision..................................... 137. Control......................................................................... 148. Logic............................................................................ 159. Monitoring.................................................................... 1610. Metering......................................................................1811. Human machine interface............................................1812. Basic IED functions..................................................... 1913. Station communication ...............................................1914. Hardware description.................................................. 1915. Connection diagrams.................................................. 2216. Technical data............................................................. 2317. Ordering for pre-configured IED...................................6518. Ordering for Accessories............................................. 68DisclaimerThe information in this document is subject to change without notice and should not be construed as a commitment by ABB. ABB assumes no responsibility for anyerrors that may appear in this document. Drawings and diagrams are not binding.© Copyright 2016 ABB.All rights reserved.TrademarksABB and Relion are registered trademarks of the ABB Group. All other brand or product names mentioned in this document may be trademarks or registeredtrademarks of their respective holders.1MRK 505 358-BEN BBreaker protection REQ650 2.1 IECProduct version: 2.12 ABB