3ContentsCopyrights ................................................................................. 71. Introduction..............................................................91.1. This manual.............................................................. 91.2. Use of symbols ......................................................... 91.3. Intended audience ..................................................... 91.4. Product documentation ............................................. 101.5. Document conventions ............................................. 101.6. Document revisions.................................................. 102. Safety information................................................... 113. Product overview .................................................... 133.1. Use of the relay....................................................... 133.2. Features................................................................. 134. Application ............................................................. 154.1. Requirements.......................................................... 154.2. Configuration .......................................................... 155. Technical description .............................................. 195.1. Functional description............................................... 195.1.1. Product functions ......................................... 195.1.1.1. Protection functions ....................... 195.1.1.2. Inputs .......................................... 195.1.1.3. Outputs........................................ 205.1.1.4. Emergency start ............................ 205.1.1.5. Restart disable.............................. 205.1.1.6. Motor start up ............................... 215.1.1.7. Rated current of the protected unit ... 215.1.1.8. Disturbance recorder...................... 225.1.1.9. Front panel................................... 225.1.1.10. Non-volatile memory ...................... 235.1.1.11. Self-supervision............................. 235.1.1.12. Time synchronization ..................... 245.1.2. Measurements ............................................ 255.1.3. Configuration............................................... 265.1.4. Protection ................................................... 295.1.4.1. Block diagram............................... 295.1.4.2. Thermal overload protection ............ 305.1.4.3. Start-up supervision ....................... 355.1.4.4. Short-circuit protection.................... 375.1.4.5. Undercurrent protection .................. 385.1.4.6. Ground-fault protection ................... 395.1.4.7. Unbalance protection ..................... 40Motor Protection RelayTechnical Reference Manual - ANSI VersionREM 610REM 6101MRS755537Issued: 11.04.2005Version: C/31.12.2007