Contents1. Application.........................................................................32. Available functions...........................................................103. Differential protection.......................................................174. Impedance protection......................................................205. Current protection............................................................206. Voltage protection............................................................237. Frequency protection.......................................................258. Multipurpose protection...................................................269. Secondary system supervision.........................................2710. Control...........................................................................2711. Logic..............................................................................2912. Monitoring......................................................................3013. Metering.........................................................................3214. Basic IED functions.........................................................3215. Human machine interface...............................................3216. Station communication ..................................................3317. Remote communication..................................................3418. Hardware description......................................................3419. Connection diagrams......................................................3820. Technical data................................................................4721. Ordering.........................................................................95Disclaimer© Copyright 2012 ABB.All rights reserved.TrademarksABB and Relion are registered trademarks of ABB Group. All other brand or product names mentioned in this document may be trademarks or registered trademarks oftheir respective holders.Generator protection REG670 ANSI 1MRK 502 031-BUS BCustomizedProduct version: 1.22 ABB