ABB REU 610 Technical Reference Manual

Also see for REU 610: Installation manual Technical reference manual Operator's manual Technical reference manual Operator's manual

Contents

ABB REU 610 Technical Reference Manual Manual pdf 11 page image

113. Product overview3.1. Use of the relayThe voltage relay REU 610 is a versatile multifunction protection relaymainly designed for overvoltage and undervoltage protection and forsupervision of medium voltage distribution networks. The relay can also beused for protecting generators, motors and transformers.The relay is based on a microprocessor environment. A self-supervisionsystem continuously monitors the operation of the relay.The HMI includes a liquid crystal display (LCD) which makes the local useof the relay safe and easy.Local control of the relay via serial communication can be carried out with acomputer connected to the front communication port. Remote control can becarried out via the rear connector connected to the control and monitoringsystem through the serial communication bus.3.2. Features* Overvoltage protection with definite-time or IDMT characteristic, low-setelement* Overvoltage protection with definite-time or IDMT characteristic, high-setelement* Based on phase-to-phase voltage measurement or negative phase-sequence (NPS) voltage* Undervoltage protection with definite-time or IDMT characteristic, low-set element* Can also be used as alarm element* Undervoltage protection with definite-time or IDMT characteristic, high-set element* Based on phase-to-phase voltage measurement or positive phase-sequence (PPS) voltage* Residual overvoltage protection with definite-time characteristic, low-setelement* Residual overvoltage protection with definite-time characteristic, high-setelement* Circuit-breaker failure protection* Trip counters for circuit-breaker condition monitoring* Trip-circuit supervision with possibility to route the warning signal to anon-trip output* Trip lockout function* Four accurate voltage inputs* User-selectable rated voltage 100/110/115/120 V* User-selectable rated frequency 50/60 Hz1MRS755972 Voltage RelayTechnical Reference Manual - ANSI VersionREU 610