ABB REU 610, Техническое справочное руководство

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3. Product overview
3.1. Use of the relay
The voltage relay REU 610 is a versatile multifunction protection relay
mainly designed for overvoltage and undervoltage protection and for
supervision of medium voltage distribution networks. The relay can also be
used for protecting generators, motors and transformers.
The relay is based on a microprocessor environment. A self-supervision
system continuously monitors the operation of the relay.
The HMI includes a liquid crystal display (LCD) which makes the local use
of the relay safe and easy.
Local control of the relay via serial communication can be carried out with a
computer connected to the front communication port. Remote control can be
carried out via the rear connector connected to the control and monitoring
system through the serial communication bus.
3.2. Features
*
Overvoltage protection with definite-time or IDMT characteristic, low-set
element
*
Overvoltage protection with definite-time or IDMT characteristic, high-set
element
*
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-set
element
*
Residual overvoltage protection with definite-time characteristic, high-set
element
*
Circuit-breaker failure protection
*
Trip counters for circuit-breaker condition monitoring
*
Trip-circuit supervision with possibility to route the warning signal to a
non-trip output
*
Trip lockout function
*
Four accurate voltage inputs
*
User-selectable rated voltage 100/110/115/120 V
*
User-selectable rated frequency 50/60 Hz
1MRS755972
Voltage Relay
Technical Reference Manual - ANSI Version
REU 610